CN220929836U - Single-acting oil cylinder and working machine - Google Patents

Abstract

The utility model relates to the field of hydraulic elements, and provides a single-acting oil cylinder and a working machine. The single-acting oil cylinder comprises a cylinder body, a piston rod, a sealing element and a guide ring; the piston rod is connected with the cylinder body in a sliding mode, one end of the piston rod is arranged in the cylinder body, the other end of the piston rod extends out of the cylinder body, the sealing element and the guide ring are arranged on the inner wall of the cylinder body, the inner wall of the guide ring and the inner wall of the sealing element are in sliding fit with the piston rod, and a groove capable of containing oil is formed in the inner wall of the guide ring. Through set up the recess that can hold fluid on the inner wall of guide ring for the fluid can be stored to the inner wall of guide ring, thereby improves the lubrication effect between guide ring and the piston rod, reduces the frictional force between guide ring and the piston rod, and then reduces the wearing and tearing of guide ring.

Description

Single-acting oil cylinder and working machine

Technical Field

The utility model relates to the technical field of hydraulic elements, in particular to a single-acting oil cylinder and a working machine.

Background

The single-acting cylinder generally comprises a cylinder body and a piston rod in sliding fit with the cylinder body, and the piston rod extends from the cylinder body and is used for supporting an object. A guide ring and a seal are typically provided on the inner wall of the cylinder. The sealing piece is in sliding fit with the piston rod and is used for sealing a gap between the piston rod and the cylinder body. The guide ring is in sliding fit with the piston rod and is used for supporting and guiding the piston rod, so that the problem that the sealing element is damaged due to eccentric wear caused by the inclination of the piston rod is solved.

The lubrication effect between the guide ring and the piston rod in the prior art is poor, so that the friction force between the piston rod and the guide ring is large, the guide ring is easy to wear, and the service life is short.

Disclosure of utility model

The utility model provides a single-acting oil cylinder and an operation machine, which are used for solving or improving the defect that in the prior art, the friction force between a piston rod and a guide ring is large, so that the guide ring is easy to wear, and realizing the effect of reducing the wear of the guide ring.

The utility model provides a single-acting oil cylinder which comprises a cylinder body, a piston rod, a sealing element and a guide ring, wherein the cylinder body is provided with a cylinder body;

The piston rod is connected with the cylinder body in a sliding mode, one end of the piston rod is arranged in the cylinder body, the other end of the piston rod extends out of the cylinder body, the sealing element and the guide ring are arranged on the inner wall of the cylinder body, the inner wall of the guide ring and the inner wall of the sealing element are in sliding fit with the piston rod, and a groove capable of containing oil is formed in the inner wall of the guide ring.

According to the single-acting oil cylinder provided by the utility model, the guide ring is arranged on one side of the sealing element, which is close to the cylinder bottom of the cylinder body, and one side of the sealing element, which is far away from the cylinder bottom.

According to the single-acting oil cylinder provided by the utility model, at least two guide rings are arranged on one side, close to the cylinder bottom, of the cylinder body, of the sealing element.

According to the single-acting oil cylinder provided by the utility model, the side wall of the guide ring is provided with the through groove, the through groove extends along the axial direction of the guide ring and is arranged in a through way, and the through groove penetrates through the side wall of the guide ring.

According to the single-acting oil cylinder provided by the utility model, the guide ring is of a plastic structure.

According to the single-acting oil cylinder provided by the utility model, the guide ring is arranged as a polyimide guide ring.

According to the single-acting oil cylinder provided by the utility model, the outer wall of the cylinder body is provided with the connecting lug, and the connecting lug is provided with the connecting hole.

According to the single-acting oil cylinder provided by the utility model, the single-acting oil cylinder further comprises a dust ring, wherein the dust ring is arranged on one side, away from the cylinder bottom of the cylinder body, of the sealing element, the dust ring is arranged on the inner wall of the cylinder body, and the inner wall of the dust ring is in sliding fit with the piston rod.

According to the single-acting oil cylinder provided by the utility model, the sealing element comprises at least two sealing rings which are distributed in sequence along the axial direction of the cylinder body.

The utility model also provides a working machine comprising the single-acting oil cylinder.

According to the single-acting oil cylinder, the piston rod is connected with the cylinder body in a sliding mode, and the piston rod can extend out to drive an object under the action of oil. Through setting up sealing member and piston rod sliding fit on the cylinder body inner wall, can seal the clearance between piston rod and the cylinder body, reduce the problem that fluid leaked. Through the guide ring and the piston rod sliding fit who sets up on the cylinder body inner wall, can support and direction the piston rod, reduce the piston rod and appear the problem of skew. Through set up the recess that can hold fluid on the inner wall of guide ring for the fluid can be stored to the inner wall of guide ring, thereby improves the lubrication effect between guide ring and the piston rod, reduces the frictional force between guide ring and the piston rod, and then reduces the wearing and tearing of guide ring.

The working machine provided by the utility model comprises the single-acting oil cylinder provided by the utility model, so that all the advantages of the single-acting oil cylinder are simultaneously contained.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a single-acting ram provided in some embodiments of the utility model;

fig. 2 is a schematic view of a guide ring provided in some embodiments of the utility model.

Reference numerals:

1. A cylinder; 2. a cylinder bottom; 201. pit; 202. an oil port; 3. a piston rod; 4. a guide ring; 401. a groove; 402. a through groove; 5. a connecting lug; 501. a connection hole; 6. a dust ring; 7. and (3) sealing rings.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the prior art, a single-acting cylinder generally comprises a cylinder body and a piston rod in sliding fit with the cylinder body, and the piston rod extends out of the cylinder body and is used for supporting an object. A guide ring and a seal are typically provided on the inner wall of the cylinder. The sealing piece is in sliding fit with the piston rod and is used for sealing a gap between the piston rod and the cylinder body. The guide ring is in sliding fit with the piston rod and is used for supporting and guiding the piston rod, so that the problem that the sealing element is damaged due to eccentric wear caused by the inclination of the piston rod is solved. The lubrication effect between the guide ring and the piston rod in the prior art is poor, so that the friction force between the piston rod and the guide ring is large, the guide ring is easy to wear, and the service life is short.

In order to solve or improve the technical problem that the friction force between a piston rod and a guide ring is large in the prior art, so that the guide ring is easy to wear, and the technical effect of reducing the wear of the guide ring is achieved, the utility model provides a single-acting oil cylinder and a working machine.

The following describes a single-acting cylinder according to an embodiment of the present utility model with reference to fig. 1 to 2.

Specifically, the single-acting cylinder includes a cylinder body, a piston rod 3, a seal, and a guide ring 4.

The cylinder body comprises a cylinder tube 1 and a cylinder bottom 2. The cylinder 1 is of a cylinder structure, and the cylinder bottom 2 is connected to one end of the cylinder 1 and seals the cylinder 1. Optionally, the cylinder 1 is welded to the cylinder bottom 2.

The piston rod 3 is slidably connected with the cylinder, and one end of the piston rod 3 is disposed in the cylinder, and the other end of the piston rod 3 protrudes from the cylinder.

The sealing element and the guide ring 4 are arranged on the inner wall of the cylinder body. Optionally, the inner wall of the cylinder body is provided with a ring groove, the sealing element and the guide ring 4 are arranged in the corresponding ring grooves, the ring groove can axially position the sealing element and the guide ring 4, and the sealing element and the guide ring 4 are prevented from moving along the axial direction of the cylinder body. The inner walls of both the guide ring 4 and the sealing member are in sliding fit with the piston rod 3, i.e. the inner walls of both the guide ring 4 and the sealing member are in fit with the outer wall of the piston rod 3. The inner wall of the guide ring 4 is provided with a groove 401 which can contain oil.

According to the single-acting oil cylinder provided by the embodiment of the utility model, the piston rod 3 is connected with the cylinder body in a sliding way, and under the action of oil, the piston rod 3 can extend out to drive an object. Through setting up sealing member and piston rod 3 sliding fit on the cylinder body inner wall, can seal the clearance between piston rod 3 and the cylinder body, reduce the problem that fluid leaked. Through the guide ring 4 and the piston rod 3 sliding fit who sets up on the cylinder body inner wall, can support and direction piston rod 3, reduce the problem that piston rod 3 appears the skew. Through set up the recess 401 that can hold fluid on the inner wall of guide ring 4 for the fluid can be stored to the inner wall of guide ring 4, thereby improves the lubrication effect between guide ring 4 and the piston rod 3, reduces the frictional force between guide ring 4 and the piston rod 3, and then reduces the wearing and tearing of guide ring 4.

Optionally, the guide ring 4 is provided with a plurality of grooves 401, and the plurality of grooves 401 are distributed on the inner wall of the guide ring 4. By arranging the plurality of grooves 401 on the inner wall of the guide ring 4, more oil can be contained on the inner wall of the guide ring 4, thereby further improving the lubrication effect between the guide ring 4 and the piston rod 3.

Alternatively, the groove 401 may be provided as a circular groove or a polygonal groove.

In the related art, the side of the sealing member away from the cylinder bottom 2 of the cylinder body is generally not provided with the guide ring 4, because if the guide ring 4 is provided at the side of the sealing member away from the cylinder bottom 2, oil in the cylinder body basically does not enter the side of the sealing member away from the cylinder bottom 2 due to the sealing effect of the sealing member, and the guide ring 4 itself does not have the function of containing oil, so that the lubrication effect between the guide ring 4 and the piston rod 3 is poor, and dry grinding is easy to occur between the guide ring 4 and the piston rod 3, resulting in damage to the guide ring 4.

In some embodiments of the utility model, the side of the seal close to the bottom 2 of the cylinder and the side of the seal remote from the bottom 2 of the cylinder are provided with guide rings 4.

In this embodiment, the sealing member is far away from the guide ring 4 on one side of the cylinder bottom 2, and is also provided with the groove 401 capable of containing oil, so that in the actual use process, the sealing member is far away from the guide ring 4 on one side of the cylinder bottom 2 and can also store oil, so that a lubrication effect is formed on the guide ring 4 and the piston rod 3, a better lubrication effect is provided between the guide ring 4 and the piston rod 3, and the abrasion problem between the guide ring 4 and the piston rod 3 is reduced.

In addition, set up guide ring 4 in the one side that the sealing member kept away from cylinder bottom 2, guide ring 4 can be closer to the one end that piston rod 3 stretched out, when piston rod 3 stretched out the cylinder body, can reduce the arm of force of piston rod 3 to make guide ring 4 can provide better supporting effect for piston rod 3, reduce the slope problem of piston rod 3. Meanwhile, the guide rings 4 are arranged on two sides of the sealing piece, so that the span of the distribution of the guide rings 4 is large, and a more stable supporting effect can be provided for the piston rod 3.

In some embodiments of the utility model, the side of the seal close to the cylinder bottom 2 of the cylinder is provided with at least two guide rings 4.

In this embodiment, by providing at least two guide rings 4, the span of the distribution of the guide rings 4 is increased, and a better supporting effect can be provided for the piston rod 3.

Referring to fig. 2, in some embodiments provided by the present utility model, a through groove 402 is provided in the sidewall of the guide ring 4. The through groove 402 extends in the axial direction of the guide ring 4 and is provided so as to penetrate the side wall of the guide ring 4, and the through groove 402 penetrates the side wall.

In the present embodiment, the through groove 402 is provided in the side wall of the guide ring 4, and the through groove 402 is provided so as to extend in both the axial direction and the wall thickness direction of the guide ring 4, so that the guide ring 4 can be compressed or pressed when the guide ring 4 is mounted in the cylinder, and the diameter of the guide ring 4 can be reduced so that the guide ring 4 can be mounted in the cylinder.

In some embodiments provided by the present utility model, the guide ring 4 is provided as a plastic structure.

In this embodiment, the guide ring 4 is configured as a plastic structure, so that on one hand, the cost of the guide ring 4 can be reduced, on the other hand, the plastic structure has a better impact resistance effect, on the other hand, the plastic structure generally has a better self-lubricating effect, and finally, the plastic structure has a hardness relative to the piston rod 3, so that the piston rod 3 is not worn and the noise is smaller when the piston rod 3 is rubbed.

In some embodiments provided by the present utility model, the guide ring 4 is provided as a polyimide guide ring 4.

In this embodiment, by setting the guide ring 4 as the polyimide guide ring 4, polyimide has extremely high thermal stability, can maintain excellent performance at high temperature, polyimide has good wear resistance, can maintain excellent performance under frictional wear conditions, polyimide has high impact resistance, and can maintain excellent performance under severe environments such as impact, vibration, and the like. Therefore, by providing the guide ring 4 as the polyimide guide ring 4, the service life of the guide ring 4 can be improved.

In some embodiments provided by the utility model, the outer wall of the cylinder body is provided with a connecting lug 5, and the connecting lug 5 is provided with a connecting hole 501. The connecting hole 501 is used for passing through a connecting piece, and the connecting piece is used for connecting the connecting lug 5 with the installation position of the single-acting oil cylinder. The connection may be a threaded connection.

In this embodiment, the connecting lugs 5 are arranged on the outer wall of the cylinder body, so that the single-acting oil cylinder is convenient to install and fix.

Further, the number of the connection lugs 5 is set to at least two, and at least two connection holes 501 are provided on each connection lug 5. Through setting up at least two engaging lugs 5 to every engaging lug 5 all is equipped with two at least connecting holes 501, can improve the fixed effect to the single-acting cylinder.

In some embodiments provided by the utility model, the single-acting cylinder further comprises a dust ring 6, wherein the dust ring 6 is arranged on one side of the sealing element away from the cylinder bottom 2 of the cylinder body, the dust ring 6 is arranged on the inner wall of the cylinder body, and the inner wall of the dust ring 6 is in sliding fit with the piston rod 3.

In the present embodiment, by providing the dust ring 6, it is possible to reduce the problem that dust or gravel enters the cylinder and damages the piston rod 3.

Optionally, an annular groove for installing the dust ring 6 is arranged on the inner wall of the cylinder body, and the dust ring 6 is arranged in the annular groove. A guide ring 4 on the side of the seal remote from the cylinder bottom 2 is arranged between the seal and the dust ring 6.

In some embodiments of the utility model, the seal comprises at least two sealing rings 7 distributed in succession along the axial direction of the cylinder.

In the present embodiment, the sealing effect between the piston rod 3 and the cylinder can be improved by providing the seal rings 7 distributed in order along the axial direction of the cylinder.

In some embodiments provided by the utility model, the cylinder bottom 2 is provided with a pit 201, the sectional area of the pit 201 is smaller than that of the piston rod 3, and an oil port 202 on the cylinder bottom 2 is communicated with the pit 201.

If the pit 201 is not arranged, when the oil is pumped into the cylinder body, the acting area of the oil on the piston rod 3 is equal to the area of the oil port 202, so that the acting force of the oil on the piston rod 3 is smaller. In the present embodiment, by providing the pit 201 in the cylinder bottom 2, when pumping oil into the cylinder, the acting area of the oil on the piston rod 3 is equal to the area of the pit 201, so that the acting force of the oil on the piston rod 3 is greater, and the piston rod 3 can be driven to move better.

The embodiment of the utility model also provides a working machine.

Specifically, the work machine includes the single-acting cylinder as described above.

It should be noted that, the working machine includes the single-acting cylinder, and all the advantages of the single-acting cylinder are also included, which is not described herein.

Work machines of the present disclosure include, but are not limited to, wheel excavators.

Further, the cylinder body of the single-acting oil cylinder is connected with an axle of the working machine through a connecting lug 5, and a piston rod 3 of the single-acting oil cylinder abuts against the bottom of the cab. The single-acting oil cylinders are arranged on the left side and the right side of the cab, and are used for keeping balance of the cab.

Further, the piston rod 3 of the single-acting cylinder is located at one end of the cylinder body and is set to be a ball head structure, the piston rod 3 is set at one end outside the cylinder body and is set to be a ball head structure, so that the piston rod 3 can be abutted against an object to be supported, such as a cab, through the ball head structure, even if the included angle between the piston rod 3 and the object to be supported changes, the ball body structure can always keep effective contact with the object to be supported, and the single-acting cylinder can provide a stable supporting effect for the object to be supported.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In the description of the present specification, reference to the terms "one embodiment," "first aspect embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The single-acting oil cylinder is characterized by comprising a cylinder body, a piston rod (3), a sealing element and a guide ring (4);

The cylinder body is characterized in that the piston rod (3) is connected with the cylinder body in a sliding mode, one end of the piston rod (3) is arranged in the cylinder body, the other end of the piston rod (3) extends out of the cylinder body, the sealing element and the guide ring (4) are arranged on the inner wall of the cylinder body, the guide ring (4) and the inner wall of the sealing element are in sliding fit with the piston rod (3), and a groove (401) capable of containing oil is formed in the inner wall of the guide ring (4).

2. Single-acting cylinder according to claim 1, characterized in that the side of the seal close to the cylinder bottom (2) of the cylinder body and the side of the seal remote from the cylinder bottom (2) are both provided with the guide ring (4).

3. Single-acting cylinder according to claim 1, characterized in that the side of the seal close to the cylinder bottom (2) of the cylinder body is provided with at least two guide rings (4).

4. The single-acting cylinder according to claim 1, wherein a through groove (402) is provided in a side wall of the guide ring (4), the through groove (402) extends in an axial direction of the guide ring (4) and is provided so as to extend therethrough, and the through groove (402) penetrates through the side wall of the guide ring (4).

5. Single-acting cylinder according to claim 1, characterized in that the guide ring (4) is provided in a plastic construction.

6. Single-acting cylinder according to claim 5, characterized in that the guide ring (4) is provided as a polyimide guide ring (4).

7. The single-acting cylinder according to any one of claims 1 to 6, characterized in that a connecting lug (5) is provided on the outer wall of the cylinder body, and a connecting hole (501) is provided on the connecting lug (5).

8. The single-acting cylinder according to any one of claims 1-6, further comprising a dust ring (6), the dust ring (6) being arranged at a side of the sealing element remote from the cylinder bottom (2) of the cylinder, the dust ring (6) being arranged on an inner wall of the cylinder, and the inner wall of the dust ring (6) being in sliding engagement with the piston rod (3).

9. A single-acting cylinder according to any one of claims 1-6, characterized in that the sealing member comprises at least two sealing rings (7) distributed in sequence in the axial direction of the cylinder body.

10. A work machine comprising a single-acting ram as claimed in any one of claims 1 to 9.