Oil cylinder buffering device

Abstract

The utility model relates to a hydraulic oil cylinder, in particular to an oil cylinder buffering device which comprises a shell and a piston rod, the piston rod is arranged in an inner cavity of the shell in a penetrating mode along the second end of the shell, a piston is fixedly arranged at the first end of the piston rod in a sleeved mode, and the oil cylinder buffering device further comprises a base fixedly connected with the first end of the shell. The second end of the base is provided with an end used for abutting against the first end of the piston, a first cavity is formed between the end and the first end of the piston, and the base is provided with an axially-formed mounting hole. The buffer mechanism is detachably fixed in the mounting hole, the second end of the buffer mechanism comprises a tubular part, at least part of the tubular part is arranged in the inner cavity of the shell in a penetrating mode, and a second cavity is defined by the tubular part; the first end of the piston rod comprises a third cavity, and a through hole is formed in the tubular part. The piston rod can be buffered through the detachable buffering mechanism, and maintenance and replacement are easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydraulic oil cylinder, especially an oil cylinder buffer device. BACKGROUND

[0002] The description in this part only provides the background information related to the utility model disclosure and does not constitute the prior art.

[0003] The piston rod of the oil cylinder is generally abutted by the base at the bottom position during rapid retraction, but in the existing part of the fast-moving oil cylinder, in order to avoid the noise of the piston rod retraction abutment, a buffer modification for cooperating with the piston rod is arranged at the position of the base, the purpose is to realize the buffering of the piston rod by means of hydraulic or other mechanical principles, but the buffering component is easy to cause structural damage due to long-time high-frequency stress, and the existing buffering structure is not easy to maintain and replace, which increases the maintenance difficulty.

[0004] It should be noted that the above introduction to the technical background is only to facilitate the clear and complete description of the technical scheme of the utility model, and to facilitate the understanding of the technical personnel in the art. The above technical scheme cannot be considered as known by the technical personnel in the art only because it is described in the background technology part of the utility model. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing an oil cylinder buffer device, which can buffer the piston rod through a detachable buffer mechanism, and is easy to maintain and replace.

[0006] In order to achieve the above-mentioned purpose, the utility model discloses an oil cylinder buffer device, which comprises a shell and a piston rod, the shell has a first end and a second end arranged oppositely, the piston rod is arranged in the inner cavity of the shell along the second end of the shell, and the first end of the piston rod is sleeved with a piston.

[0007] The second end of the base is provided with an end portion for abutting with the first end of the piston, a first cavity is formed between the end portion and the first end of the piston, and the base is provided with an installation hole arranged in the axial direction.

[0008] The buffer mechanism is detachably installed on the base, the second end of the buffer mechanism comprises a tubular portion, at least part of the tubular portion is arranged in the inner cavity of the shell, and the tubular portion forms a second cavity.

[0009] The first end of the tubular part comprises a first connecting hole arranged radially, the base comprises a second connecting hole arranged radially and communicated with the first connecting hole, the second connecting hole is communicated with an external oil tank, the first end of the piston rod comprises a third cavity for accommodating the tubular part, the first cavity, the second cavity and the third cavity contain oil, the tubular part is provided with a through hole, and the through hole is used for exchanging the oil between the first cavity, the second cavity and the third cavity when the tubular part of the buffer mechanism is displaced relative to the piston rod.

[0010] As further description of the above technical solution, the outer wall between the first end and the second end of the buffer mechanism is provided with an external thread, the mounting hole of the base is provided with an internal thread, the external thread and the internal thread are matched in size, and the buffer mechanism is threadedly connected with the base.

[0011] As further description of the above technical solution, the first end of the piston rod comprises a collar groove, a collar is arranged in the collar groove, the collar is sleeved on the tubular part, and the inner diameter of the collar is matched with the diameter of the tubular part.

[0012] As further description of the above technical solution, the first end of the piston rod comprises a collar groove, a collar is arranged in the collar groove, the collar is sleeved on the tubular part, and the inner diameter of the collar is matched with the diameter of the tubular part.

[0013] As further description of the above technical solution, the outer wall of the tubular part and the mounting hole of the base are provided with a gasket for sealing.

[0014] As further description of the above technical solution, the first end of the tubular part comprises a first connecting hole arranged radially, the base comprises a second connecting hole arranged radially and communicated with the first connecting hole, the second connecting hole is communicated with an external oil tank, the first end of the piston rod comprises a third cavity for accommodating the tubular part, the first cavity, the second cavity and the third cavity contain oil, the tubular part is provided with a through hole, and the through hole is used for exchanging the oil between the first cavity, the second cavity and the third cavity when the tubular part of the buffer mechanism is displaced relative to the piston rod.

[0015] As further description of the above technical solution, the first end of the buffer mechanism has a flange part, and the flange part abuts against the first end face of the base.

[0016] Through the above technical solution, the beneficial effects of the present application are as follows:

[0017] The oil cylinder buffering device can buffer the piston rod through the detachable buffering mechanism, the buffering mechanism is detachably installed in the mounting hole of the base, specifically, the buffering mechanism forms an intermediary between the external oil tank and the first cavity, the second cavity and the third cavity, exchanges oil through the through hole of the pipe-shaped part, and realizes the buffering effect through the resistance of the oil, therefore, the buffering mechanism as a key component is vulnerable to impact damage, but the detachable design can enable the operator to quickly replace the buffering mechanism without disassembling the oil cylinder shell, is beneficial to maintenance, and has lower installation cost.

[0018] To further understand the features and technical contents of the utility model, please refer to the following detailed description and drawings of the utility model, however, the provided drawings are only used for providing reference and description, and are not used to limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment or prior art of the present specification, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments in the present specification, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0020] Figure 1 is a cross-sectional schematic view of an oil cylinder buffering device provided by the embodiment of the present specification;

[0021] Figure 2 is a three-dimensional schematic view of an oil cylinder buffering device provided by the embodiment of the present specification;

[0022] In the drawings:

[0023] 1, shell;

[0024] 2, piston rod;21, collar;22, snap ring;

[0025] 3, piston;

[0026] 4, base;41, second connecting hole;

[0027] 5, buffering mechanism;51, pipe-shaped part;511, through hole;512, gasket;513, first connecting hole;52, flange part. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the technical solutions in the specification, the technical solutions in the specification will be clearly and completely described below in combination with the drawings in the specification. Obviously, the described embodiments are only a part of the embodiments of the specification, not all. Based on the embodiments in the specification, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the specification.

[0029] The following is to illustrate the embodiments of the utility model by specific specific embodiments, and the person skilled in the art can understand the advantages and effects of the utility model from the disclosed content of the specification. The utility model can be implemented or applied by other different specific embodiments, and each detail in the specification can be modified and changed based on different viewpoints and applications without departing from the concept of the utility model. In addition, the drawings of the utility model are only simple schematic illustrations, not the depiction of actual size, and the prior declaration is made. The following embodiments will further illustrate the related technical content of the utility model, but the disclosed content is not used to limit the protection scope of the utility model.

[0030] It should be understood that although the terms "first", "second", "third" and the like may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or more combinations of the associated listed items.

[0031] Please refer to Figures 1-2 , an oil cylinder buffering device, comprising a shell 1 and a piston rod 2, the shell 1 has a first end and a second end arranged oppositely, the piston rod 2 is arranged in the inner cavity of the shell 1 along the second end of the shell 1, and the first end of the piston rod 2 is sleeved with a piston 3, wherein the oil cylinder buffering device comprises:

[0032] A base 4 is fixedly connected with the first end of the shell 1, the second end of the base 4 has an end portion for abutting with the first end of the piston 3, a first cavity is formed between the end portion and the first end of the piston 3, and the base 4 has an installation hole arranged in the axial direction;

[0033] A buffering mechanism 5 is detachably fixed in the installation hole, the second end of the buffering mechanism 5 comprises a tubular portion 51, at least part of the tubular portion 51 is arranged in the inner cavity of the shell 1, and the tubular portion 51 forms a second cavity;

[0034] The tubular section 51 has a first connecting hole 513 arranged radially at its first end. The base 4 has a second connecting hole 41 arranged radially and communicating with the first connecting hole 513. The second connecting hole 41 communicates with the external oil tank. The piston rod 2 has a third cavity for accommodating the tubular section 51. The first cavity, the second cavity and the third cavity contain oil. The tubular section 51 has a through hole 511. The through hole 511 is used to allow oil to be exchanged between the first cavity, the second cavity and the third cavity when the tubular section 51 of the buffer mechanism 5 is displaced relative to the piston rod 2.

[0035] With the above-described structure, during operation, when the cylinder starts running, the piston rod 2 pushes the piston 3 towards the first end. The oil in the first chamber on the left side of the piston 3 is pushed towards the tubular section 51 under pressure. Specifically, since the tubular section 51 is provided with a through hole 511, under pressure, the oil is transferred to the second or third chamber through the through hole 511, and then transferred from the second end of the tubular section 51 to the first end, until it flows through the first connecting hole 513 of the tubular section 51 to the second connecting hole 41 of the base 4, and is discharged to the external oil tank, thus completing one stroke. The transfer of oil, combined with the through hole 511 of a preset size, creates resistance to the oil, resulting in a certain buffering effect during the piston 3's return, preventing vibration, noise, or even damage caused by a hard collision between the piston 3 and the end face of the base 4.

[0036] With the above structure, when the buffer mechanism 5 needs maintenance, the operator can simply separate the buffer mechanism 5 from the base 4. In other words, in... Figure 1 The buffer mechanism 5 can be removed from the base 4 from right to left. Similarly, to install a new buffer mechanism 5, simply insert the tubular part 51 of the buffer mechanism 5 into the housing 1 through the mounting hole of the base 4. Compared with the existing design where the buffer mechanism 5 is set inside the housing 1, there is no need to completely remove the housing 1. Operators can quickly and conveniently maintain the buffer mechanism 5, etc., which greatly improves the convenience of maintenance.

[0037] Furthermore, an external thread is provided on the outer wall between the first and second ends of the buffer mechanism 5, and an internal thread is provided on the mounting hole of the base 4. The external and internal threads are sized to allow for threaded connection between the buffer mechanism 5 and the base 4. In this embodiment, the threaded connection method allows for easy and quick assembly and disassembly of the buffer mechanism 5, while also providing good sealing and low processing difficulty.

[0038] Further, the first end of the piston rod 2 comprises a collar groove, a collar 21 is installed in the collar groove, the collar 21 is sleeved on the pipe-shaped part 51, and the inner diameter of the collar 21 matches the diameter size of the pipe-shaped part 51. Specifically, the first end of the piston rod 2 comprises a clamping ring groove, a C-shaped clamping ring 22 is installed in the clamping ring groove, the inner diameter of the clamping ring 22 is smaller than the outer diameter of the collar 21, and the clamping ring 22 is used to limit the collar 21 in the collar groove. Specifically, during installation, the operator first sleeves the collar 21, and then changes the size of the C-shaped clamping ring 22 by pinching, and clamps it in the clamping ring groove to reset, so as to realize the installation of the clamping ring 22 and the limiting of the collar 21. Specifically, the collar 21 can play a guiding role for the pipe-shaped part 51, and the left and right sides of the collar 21 also have certain oil exchange control functions. The size of the collar 21 can be used to control the oil flow, so as to provide different intensity resistance buffering effect.

[0039] Further, a gasket 512 for sealing is arranged between the outer wall of the pipe-shaped part 51 and the mounting hole of the base 4. The gasket 512 can enhance the sealing effect before and after the buffer mechanism 5, and avoid oil leakage from the second end side.

[0040] Further, the first end of the buffer mechanism 5 has a flange part 52, which abuts on the first end face of the base 4. The flange part 52 can improve the sealing effect between the buffer mechanism 5 and the base 4, and the flange part 52 itself can be used as a nut for easy disassembly.

[0041] The above disclosed content is only the preferred feasible embodiment of the utility model, and does not limit the patent application range of the utility model, so that any equivalent technical change made by applying the content of the utility model specification and drawings is included in the patent application range of the utility model.

[0042] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0043] Although the present application is described through embodiments, those skilled in the art know that the present application has many modifications and changes without departing from the spirit of the present application, and it is hoped that the attached embodiments include these modifications and changes without departing from the present application.

Claims

1. A cylinder damping device comprising a housing having a first end and a second end disposed opposite each other, and a piston rod disposed in a cavity of the housing along the second end of the housing, a first end of the piston rod being provided with a piston, characterized in that, The oil cylinder buffer device comprises: a base fixedly connected with a first end of the shell, a second end of the base having an end portion for abutting against a first end of the piston, a first cavity being formed between the end portion and the first end of the piston, the base having an axially arranged mounting hole; a buffer mechanism detachably mounted on the base, a tubular portion of a second end of the buffer mechanism, at least part of the tubular portion being arranged in the inner cavity of the shell, the tubular portion enclosing a second cavity; wherein a first connecting hole radially arranged at a first end of the tubular portion, the base comprising a second connecting hole radially arranged and in communication with the first connecting hole, the second connecting hole being in communication with an external oil tank, a first end of the piston rod comprising a third cavity for accommodating the tubular portion, the first cavity, the second cavity and the third cavity containing oil, the tubular portion having a through hole for the oil to exchange between the first cavity, the second cavity and the third cavity when the tubular portion of the buffer mechanism is displaced relative to the piston rod.

2. The cylinder cushioning device of claim 1, wherein: An outer thread is arranged on an outer wall between the first end and the second end of the buffer mechanism, an inner thread is arranged on the mounting hole of the base, the outer thread and the inner thread being matched in size for thread connection between the buffer mechanism and the base.

3. The cylinder cushioning device of claim 1, wherein: A first end of the piston rod comprises a collar groove, a collar is mounted in the collar groove, the collar being sleeved on the tubular portion, and an inner diameter of the collar being matched in size with a diameter of the tubular portion.

4. The cylinder cushioning device of claim 3, wherein: A first end of the piston rod comprises a snap ring groove, a C-shaped snap ring is mounted in the snap ring groove, an inner diameter of the snap ring being smaller than an outer diameter of the collar, the snap ring being used for limiting the collar in the collar groove.

5. The cylinder cushioning device of claim 1, wherein: A gasket for sealing is arranged between an outer wall of the tubular portion and the mounting hole of the base.

6. The cylinder cushioning device of claim 1, wherein: A first end of the buffer mechanism has a flange portion abutting against a first end face of the base.

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