CN216044724U

CN216044724U - Improved sealing hydraulic oil cylinder

Info

Publication number: CN216044724U
Application number: CN202121480337.9U
Authority: CN
Inventors: 许科伟; 叶腾亮; 张艳成; 孙华昌
Original assignee: Changzhou Wujin Anwei Hydraulic Manufacturing Co ltd
Current assignee: Changzhou Wujin Anwei Hydraulic Manufacturing Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-03-15
Anticipated expiration: 2031-07-01

Abstract

The utility model relates to the field of machine manufacturing, in particular to an improved sealing hydraulic oil cylinder which is provided with a first sealing assembly and a second sealing assembly, wherein a first piston sealing sleeve is obliquely pressed on a first conical ring sleeve, a second conical ring sleeve is obliquely pressed on a second piston sealing sleeve, and when a piston rod and a piston assembly are respectively in contact sliding with a cylinder cover bush and the inner wall of a cylinder body while the sealing performance is kept, the first piston sealing sleeve and the second piston sealing sleeve are pressed through conical surfaces formed by the first conical ring sleeve and the second conical ring sleeve to enable the first piston sealing sleeve and the second piston sealing sleeve to be in stable contact sealing, so that the sealing of the hydraulic oil cylinder is prevented from being loosened after the hydraulic oil cylinder is used for a long time, and the sealing performance is reduced.

Description

Improved sealing hydraulic oil cylinder

Technical Field

The utility model relates to the technical field of machinery, in particular to an improved sealing hydraulic oil cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging 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. After the existing hydraulic oil cylinder is used for a long time, a gap can be formed between a sealing element and a cylinder body, and the sealing performance of the existing hydraulic oil cylinder can be reduced, so that the existing oil cylinder needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a sealing improved hydraulic oil cylinder.

The technical scheme for realizing the purpose of the utility model is as follows: the utility model provides a sealed improvement type hydraulic cylinder, has the cylinder body, the one end sealing connection cylinder cap and the cylinder cap bush of cylinder body, the other end sealing connection cylinder bottom of cylinder body, cylinder cap bush sliding connection has the piston rod, the piston rod has the piston assembly of sliding connection in the inner wall of cylinder body, piston assembly includes first piston, mirror symmetry in the second piston of first piston, first piston and second piston pass through a pair of first seal assembly swing joint in the inner wall of cylinder body of mirror symmetry in first piston, first seal assembly has the first piston seal cover, first toper ring cover, first wave form gasket, the buckle that connects gradually, cylinder cap and cylinder cap bush pass through second seal assembly sliding connection the piston rod, second seal assembly has the second piston seal cover, second toper ring cover, second wave form gasket, the buckle that connects gradually, The housing is sealed.

In the technical scheme, the first piston sealing sleeve is obliquely pressed on the first conical ring sleeve, the first corrugated gasket is positioned between the first conical ring sleeve and the buckle, and the buckle is buckled on the first conical ring sleeve.

According to the technical scheme, the first piston sealing sleeve is L-shaped, and is hermetically embedded between the first piston and the second piston and hermetically and slidably connected to the inner wall of the cylinder body.

According to the technical scheme, the first conical ring sleeve is made of stainless steel.

According to the technical scheme, the second conical sleeve is obliquely pressed on the second piston sealing sleeve, and the second corrugated gasket is located between the second conical sleeve and the sealing shell.

According to the technical scheme, the second piston sealing sleeve is embedded in the cylinder cover bushing and is connected to the piston rod in a sliding mode.

According to the technical scheme, the sealing shell is buckled between the first piston sealing sleeve and the cylinder cover and is connected to the piston rod in a sliding mode.

After the technical scheme is adopted, the utility model has the following positive effects:

the utility model is provided with a first sealing component and a second sealing component, wherein a first piston sealing sleeve is obliquely pressed on a first conical ring sleeve, a second conical ring sleeve is obliquely pressed on a second piston sealing sleeve, and when the sealing property is kept, and a piston rod and the piston component are respectively contacted and slid with a cylinder cover bush and the inner wall of a cylinder body, the first piston sealing sleeve and the second piston sealing sleeve are pressed through conical surfaces formed by the first conical ring sleeve and the second conical ring sleeve to be stably contacted and sealed, so that the sealing property is prevented from being reduced due to the sealing looseness after the hydraulic cylinder is used for a long time.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is an enlarged schematic view of B in fig. 1.

In the figure: cylinder block 1, cylinder head 2, cylinder head bush 3, cylinder bottom 4, first piston 51, second piston 52, first piston seal cover 61, first taper ring cover 62, first wave form gasket 63, buckle 64, second piston seal cover 71, second taper ring cover 72, second wave form gasket 73, sealed shell 74, first piston seal cover notch 521, second piston seal cover notch 31.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" 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 in specific cases to those skilled in the art.

(example 1)

Referring to fig. 1, 2 and 3, the utility model provides an improved sealing hydraulic cylinder, which comprises a cylinder body 1, wherein one end of the cylinder body 1 is hermetically connected with a cylinder cover 2 and a cylinder cover bushing 3, the other end of the cylinder body 1 is hermetically connected with a cylinder bottom 4, the cylinder cover bushing 3 is slidably connected with a piston rod 4, the piston rod 4 is provided with a piston assembly slidably connected with the inner wall of the cylinder body 1, the piston assembly comprises a first piston 51 and a second piston 52 which is in mirror symmetry with the first piston 51, and the first piston 51 and the second piston 52 are movably connected with the inner wall of the cylinder body 1 through a pair of first sealing assemblies which are in mirror symmetry with the first piston 51. The first sealing assembly is provided with a first piston sealing sleeve 61, a first conical ring sleeve 62, a first wave-shaped gasket 63 and a buckle 64 which are connected in sequence from right to left, and the cylinder cover 2 and the cylinder cover bushing 3 are slidably connected with the piston rod 4 through a second sealing assembly, which is shown in fig. 2. The second seal assembly has two sets, taking the second seal assembly of fig. 3 as an example, the second seal assembly has a second piston gland 71, a second conical ring sleeve 72, a second wave washer 73, and a seal housing 74 connected in sequence from right to left. The first piston gland 61 is used to ensure the tightness between the piston assembly and the inner wall of the cylinder 1. The first wave-shaped gasket 63 may be, but not limited to, an elastic member such as a wave spring, the first wave-shaped gasket 63 is located between the first tapered collar 62 and the buckle 64, and may provide an axial buffering force and an axial pressure, and the axial pressure, that is, the first wave-shaped gasket 63 may tightly press the first tapered collar 62 to the first piston sealing sleeve 61 through an elastic force, so as to ensure that the first piston sealing sleeve 61 can be slidably sealed on the inner wall of the cylinder body 1 without a gap, and at the same time, the first piston sealing sleeve 61 can also have good sealing performance after long-term use. Likewise, the second piston gland 71 is used to ensure the tightness between the cylinder head bushing 3 and the piston rod 4. Second wave washer 73 may be, but not limited to, an elastic member such as a wave spring, and second wave washer 73 is located between second cone-shaped collar 72 and seal housing 74, which may also provide axial damping force and axial pressure, and the axial pressure of second wave washer 73, i.e. second wave washer 73, may make second cone-shaped collar 72 tightly press against second piston sealing sleeve 71 by the elastic force. The second piston sealing sleeve 71 can be ensured to be sealed on the piston rod 4 in a gapless sliding manner, and meanwhile, the second piston sealing sleeve 71 can also have good sealing performance after long-term use.

The first piston gland 61 is pressed obliquely against the first tapered collar 62, the first wave washer 63 is located between the first tapered collar 62 and the buckle 64, and the buckle 64 is fastened to the first tapered collar 62. In order to make the first piston sealing sleeve 61 press fit with the first tapered ring sleeve 62 better, the pressing surfaces of the first piston sealing sleeve 61 and the first tapered ring sleeve 62 are both designed as inclined surfaces.

The first piston sealing sleeve 61 is L-shaped, and the first piston sealing sleeve 61 is hermetically fitted between the first piston 51 and the second piston 52 and is hermetically slidably connected to the inner wall of the cylinder 1. The second piston 52 is provided with two first piston sealing sleeve notches 521 which are matched with the first piston sealing sleeve 61, and the L-shaped first piston sealing sleeve 61 is embedded into the two first piston sealing sleeve notches 521 and then is tightly matched between the first piston 51 and the second piston 52.

The first tapered collar 62 is made of stainless steel.

Second conical sleeve 72 is pressed diagonally against second piston sealing sleeve 71, and second wave washer 73 is located between second conical sleeve 72 and seal housing 74. In order to provide for better compression of second conical ring sleeve 72 against second piston sealing sleeve 71, the compression surfaces of second conical ring sleeve 72 and second piston sealing sleeve 71 are both of a beveled design.

The second piston gland 71 is embedded in the cylinder head bushing 3 and is slidably connected to the piston rod 4, the connection and the matching are compact, and the cylinder head bushing 3 is provided with a corresponding second piston gland groove opening 31.

The seal housing 74 is fastened between the first piston gland 71 and the cylinder head 2 and is slidably connected to the piston rod 4. Specifically, the sealing housing 74 is "2" shaped, one end of which is attached to the second wave washer 73 and is slidably connected to the piston rod 4, and the other end of which is fastened in the first piston sealing sleeve 71 and is tightly attached to the cylinder head 2.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sealed improvement type hydraulic cylinder which characterized in that: the cylinder is provided with a cylinder body (1), one end of the cylinder body (1) is connected with a cylinder cover (2) and a cylinder cover bush (3) in a sealing way, the other end of the cylinder body (1) is connected with a cylinder bottom (4) in a sealing way, the cylinder cover bush (3) is connected with a piston rod (4) in a sliding way, the piston rod (4) is provided with a piston assembly which is connected with the inner wall of the cylinder body (1) in a sliding way, the piston assembly comprises a first piston (51) and a second piston (52) which are in mirror symmetry with the first piston (51), the first piston (51) and the second piston (52) are movably connected with the inner wall of the cylinder body (1) through a pair of first sealing assemblies which are in mirror symmetry with the first piston (51), each first sealing assembly is provided with a first piston sealing sleeve (61), a first conical ring sleeve (62), a first waveform gasket (63) and a buckle (64) which are connected in sequence, the cylinder cover (2) and the cylinder cover bush (3) are connected with the piston rod (4) in a sliding way through a second sealing assembly, the second sealing assembly is provided with a second piston sealing sleeve (71), a second conical ring sleeve (72), a second corrugated gasket (73) and a sealing shell (74) which are connected in sequence.

2. A seal-improved hydraulic ram according to claim 1, characterised in that: the first piston sealing sleeve (61) is obliquely pressed on the first conical ring sleeve (62), the first corrugated gasket (63) is positioned between the first conical ring sleeve (62) and the buckle (64), and the buckle (64) is buckled on the first conical ring sleeve (62).

3. A seal-improved hydraulic ram according to claim 2, characterised in that: the first piston sealing sleeve (61) is L-shaped, and the first piston sealing sleeve (61) is hermetically embedded between the first piston (51) and the second piston (52) and is hermetically and slidably connected to the inner wall of the cylinder body (1).

4. A seal-improved hydraulic ram according to claim 1, characterised in that: the first conical ring sleeve (62) is made of stainless steel.

5. A seal-improved hydraulic ram according to claim 1, characterised in that: the second conical sleeve (72) is pressed obliquely against the second piston sealing sleeve (71), the second wave-shaped gasket (73) being located between the second conical sleeve (72) and the sealing housing (74).

6. A seal-improved hydraulic ram according to claim 5, characterised in that: the second piston sealing sleeve (71) is embedded in the cylinder cover bushing (3) and is connected to the piston rod (4) in a sliding mode.

7. A seal-improved hydraulic ram according to claim 5, characterised in that: the sealing shell (74) is buckled between the first piston sealing sleeve (71) and the cylinder cover (2) and is connected with the piston rod (4) in a sliding mode.