Hydraulic oil backflow filtering device of servo oil cylinder

Abstract

The utility model relates to the related technical field of material pumping machines, in particular to a servo oil cylinder hydraulic oil backflow filtering device which comprises a filtering cylinder body, a first sealing plate, a liquid inlet, a second sealing plate, a liquid outlet, a connecting piece, a filtering inner cylinder and a fixing assembly. According to the hydraulic oil backflow filtering device of the servo oil cylinder, the liquid inlet and the first sealing plate are integrally formed, the liquid outlet and the second sealing plate are integrally formed, the first sealing plate and the second sealing plate can be conveniently connected through the connecting assembly, then the filtering barrel body can be conveniently and rapidly disassembled and assembled, and therefore the filtering inner barrel can be conveniently overhauled; as the filtering inner cylinder is arranged to be of a detachable structure, the filtering inner cylinder can be conveniently removed from the filtering cylinder body, and residual impurities on the filtering inner cylinder can be cleaned.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of servo oil cylinder, especially relates to a servo oil cylinder hydraulic oil backflow filtering device. BACKGROUND

[0002] Hydraulic systems are an integral part of modern industry, widely used in various mechanical equipment, such as excavators, road rollers, cranes, etc. With the wide application of hydraulic systems, the requirements for its operation reliability and service life are also increasing. Hydraulic oil, as an important medium of hydraulic system, directly affects the performance and service life of the system. Hydraulic oil in the hydraulic system will work in high pressure, high temperature, wear and tear and other harsh environments for a long time, and is easily contaminated by various impurities. These impurities include metal powder, fibers, moisture, colloids and deposits produced by oil oxidation, which can seriously affect the normal operation of system components and the service life of the entire system. In order to ensure the normal operation of the hydraulic system and prolong its service life, the hydraulic oil must be effectively filtered.

[0003] The utility model discloses a kind of hydraulic oil filtering devices with publication number CN222152395U, and it relates to the technical field of filtration, comprising: base, upper cover, limit board, support frame and magnet, the base and upper cover are fixedly connected by support frame, the base and upper cover are parallel to each other, the support frame and the base are perpendicular to each other, the limit board is semicircular ring, there are multiple limit boards, multiple limit boards are arranged on support frame and parallel to each other, the limit board and support frame are fixed by welding, the limit board and the base are parallel to each other, the magnet is placed on limit board. By support frame connecting base and upper cover, a vertical frame structure is formed, which is convenient to install and disassemble, and by the setting of multiple limit boards, the installation of magnet is facilitated, and the iron filings impurities in hydraulic oil are absorbed by magnet.

[0004] The pipe bending machine in the above-mentioned technology has the problems of limited filtering precision, small filter surface area, and low filtering efficiency due to its design characteristics. Therefore, it is necessary to develop a more efficient and reliable hydraulic oil filtering technology to meet the needs of modern industrial development. UTILITY MODEL CONTENTS

[0005] The utility model solves the problems in the related art, and provides a servo oil cylinder hydraulic oil backflow filtering device. The clamping assembly can fix the port of the pipe rod in the molding process. The driving assembly drives the molding wheel to rotate, and the feeding unit feeds the pipe rod body in the molding process, effectively ensuring the efficiency of pipe bending molding of the pipe rod body. In addition, the feeding unit achieves the purpose of automatic feeding of the pipe rod in the bending molding process through a compact mechanical structure, avoiding the use of electrical equipment and saving resources.

[0006] In order to solve the above technical problems, the utility model is through the following technical scheme realizes: a servo oil cylinder hydraulic oil backflow filter device, including filter cylinder, first sealing plate of setting on the filter cylinder upper end face, with first sealing plate intercommunication's liquid inlet, second sealing plate of setting in the filter cylinder lower end face, with second sealing plate intercommunication's liquid outlet, be used for connecting first sealing plate and second sealing plate's connecting piece, filter inner tube of setting in the filter cylinder and be used for fixing filter inner tube's fixed assembly.

[0007] Through adopting above technical scheme, liquid inlet and first sealing plate are integrally formed, liquid outlet and second sealing plate are integrally formed, connecting assembly is convenient for connecting first sealing plate and second sealing plate, and then it is convenient to complete the quick disassembly of filter cylinder, so that it is convenient to overhaul filter inner tube, in addition, because filter inner tube is set as detachable structure, it is convenient to remove filter inner tube from filter cylinder, and the impurities remaining on filter inner tube are cleaned.

[0008] As a preferred scheme, the liquid inlet is integrally formed with the first sealing plate, and the liquid outlet is integrally formed with the second sealing plate.

[0009] Through adopting above technical scheme, liquid inlet and first sealing plate are integrally formed, liquid outlet and second sealing plate are integrally formed, and connecting assembly is designed to facilitate connecting first sealing plate and second sealing plate, so that the whole filter cylinder can be quickly disassembled, and the filter inner tube is convenient to overhaul.

[0010] As a preferred scheme, the outer diameter of the liquid inlet is smaller than the inner diameter of the filter inner tube, and the outer diameter of the filter inner tube is smaller than the inner diameter of the filter cylinder.

[0011] Through adopting above technical scheme, high-efficiency and accurate filtering effect is realized, and the core lies in that the outer diameter of the liquid inlet is smaller than the inner diameter of the filter inner tube, and the outer diameter of the filter inner tube is smaller than the inner diameter of the filter cylinder, so that the hydraulic oil must flow in the gradually narrowing space, and the larger impurities are intercepted through the filtering effect of the filter inner tube, and the filtering precision is improved, when the hydraulic oil flows to the filter cylinder, first enters the liquid inlet, then passes through the filter inner tube in the narrowed space, and finally flows out of the filter cylinder, in the process, the impurities are intercepted by the filter inner tube, and finally the high-efficiency impurity removal function is realized, and the hydraulic oil is purified.

[0012] As a preferred solution, the connecting piece comprises a first connecting lug plate fixedly arranged on both sides of the first sealing plate respectively, a second connecting lug plate fixedly arranged on both sides of the second sealing plate respectively, a connecting rod for connecting the first connecting lug plate and the second connecting lug plate, a first fixing nut arranged at the connecting position of the connecting rod and the first connecting lug plate, and a second fixing nut arranged at the connecting position of the connecting rod and the second connecting lug plate, the first connecting lug plate and the second connecting lug plate are respectively provided with a connecting hole matched with the connecting rod, and the inner wall of the connecting hole is provided as a smooth circular arc surface.

[0013] By adopting the above technical solution, the connection is reliable and convenient to disassemble and assemble, specifically, the first connecting lug plate and the second connecting lug plate are fixedly arranged on the first sealing plate and the second sealing plate respectively, and a circular arc connecting hole matched with the connecting rod is reserved on the edge thereof, the connecting rod passes through the connecting holes on the two connecting lug plates and is fixedly connected by the first fixing nut and the second fixing nut, after the nuts are screwed, the connecting rod is tightly combined with the first connecting lug plate and the second connecting lug plate, and a firm connection is formed between the sealing plates, since the inner wall of the connecting hole is a smooth circular arc surface, the connecting rod can be easily inserted and taken out, which facilitates the disassembly and assembly process.

[0014] As a preferred solution, the fixing assembly comprises a mounting check ring fixedly arranged on the inner wall of the upper end face of the filter cartridge body, a fixing plate fixedly arranged on the outer periphery of the filter inner cylinder, a limiting column uniformly arranged on the lower end face of the fixing plate, and a limiting groove arranged on the upper end face of the mounting check ring matched with the limiting column.

[0015] By adopting the above technical solution, the fixing device composed of the mounting check ring, the fixing plate, the limiting column and the limiting groove realizes the fixation and positioning of the filter inner cylinder, the mounting check ring is arranged on the inner wall of the upper end face of the filter cartridge body, the fixing plate is fixedly arranged on the outer periphery of the filter inner cylinder, the limiting column is uniformly arranged on the lower end face of the fixing plate, and the limiting groove is arranged on the upper end face of the mounting check ring matched with the limiting column, when the filter inner cylinder is assembled, a fixing action is formed between the limiting groove and the limiting column, thereby ensuring the horizontal stability of the filter inner cylinder, effectively preventing the deviation or falling off of the filter inner cylinder, and ensuring the safe operation and filtering efficiency of the filter inner cylinder.

[0016] As a preferred solution, it further comprises a positioning groove arranged on the inner wall of the first sealing plate and the second sealing plate matched with the filter cartridge body respectively, and the inner wall of the positioning groove is provided with a sealing washer.

[0017] By adopting the technical scheme, the positioning groove matched with the filter cylinder body is arranged on the inner wall of the first sealing plate and the second sealing plate, and the sealing gasket is arranged on the inner wall, so that the air tightness between the filter cylinder body and the sealing plate is effectively ensured, thereby avoiding the leakage of hydraulic oil in the filtering process.

[0018] First, the liquid inlet is connected with the oil outlet of the servo oil cylinder, the hydraulic oil enters the filter cylinder body through the liquid inlet, and the clean hydraulic oil is discharged through the liquid outlet after being filtered by the filter inner cylinder, and the liquid outlet is connected with the oil inlet of the servo oil cylinder, and the clean hydraulic oil enters the servo oil cylinder;

[0019] When the filter inner cylinder needs to be repaired, the filter cylinder body is quickly disassembled by using the connecting assembly, the filter inner cylinder is taken out, the filter inner cylinder is cleaned, and finally the filter inner cylinder is put back into the filter cylinder body and connected with the sealing plate, so that the use can be restored.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] 1. The liquid inlet is integrally formed with the first sealing plate, the liquid outlet is integrally formed with the second sealing plate, and the connecting assembly is designed to facilitate the connection of the first sealing plate and the second sealing plate, so that the entire filter cylinder body can be quickly disassembled and assembled, and the filter inner cylinder can be conveniently repaired;

[0022] 2. The filter inner cylinder is fixed in the filter cylinder body by the fixing device composed of the retaining ring, the fixing plate, the limiting column and the limiting groove, so as to ensure horizontal stability and effectively prevent the filter inner cylinder from deviating or falling off. In order to ensure the air tightness, the positioning groove is arranged between the filter cylinder body and the first sealing plate and the second sealing plate, and the sealing gasket is arranged on the inner wall to prevent the leakage of hydraulic oil. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the overall structure schematic view of the servo oil cylinder hydraulic oil backflow filter device of the utility model;

[0024] Figure 2 is the structure schematic view of the partial half sectional view of the overall structure in the servo oil cylinder hydraulic oil backflow filter device of the utility model;

[0025] Figure 3 is the structure schematic view of the front view of the servo oil cylinder hydraulic oil backflow filter device in the utility model; Figure 2

[0026] Figure 4 ​Is the structure diagram of the filter inner cylinder in the servo oil cylinder hydraulic oil backflow filtering device of the utility model.

[0027] Figure 5 Is the structure diagram of the second sealing plate in the servo oil cylinder hydraulic oil backflow filtering device of the utility model.

[0028] In the figure,

[0029] 1, filter cylinder body; 10, mounting check ring; 101, limiting groove; 21, liquid inlet; 22, liquid outlet; 31, first sealing plate; 311, first connecting ear plate; 32, second sealing plate; 321, second connecting ear plate; 41, connecting rod; 421, first fixed nut; 422, second fixed nut; 5, filter inner cylinder; 51, fixed plate; 511, limiting column; 6, positioning groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0032] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0033] In the description of the present application, it is necessary to understand that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated by the orientation or position relationship shown in the drawings are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0034] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0035] In addition, it should be noted that the use of the words "first", "second" and the like to define parts of components is only for the convenience of distinguishing the corresponding parts of components, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0036] AsFigures 1 to 5 As shown, a servo oil cylinder hydraulic oil backflow filtering device, comprising a filter cylinder body 1, a first sealing plate 31 arranged on the upper end surface of the filter cylinder body 1, a liquid inlet 21 in communication with the first sealing plate 31, a second sealing plate 32 arranged on the lower end surface of the filter cylinder body 1, a liquid outlet 22 in communication with the second sealing plate 32, the liquid inlet 21 is integrally formed with the first sealing plate 31, the liquid outlet 22 is integrally formed with the second sealing plate 32, the liquid inlet 21 is integrally formed with the first sealing plate 31, the liquid outlet 22 is integrally formed with the second sealing plate 32, and the connecting assembly is designed to facilitate the connection of the first sealing plate 31 and the second sealing plate 32, so that the entire filter cylinder body 1 can be quickly disassembled and the filter inner cylinder 5 can be easily maintained.

[0037] For details, please refer to Figure 1 , Figure 2 and Figure 3 The outer diameter of the liquid inlet 21 is smaller than the inner diameter of the filter inner cylinder 5, and the outer diameter of the filter inner cylinder 5 is smaller than the inner diameter of the filter cylinder body 1, so as to realize high-efficiency and precise filtering effect. The core is that the outer diameter of the liquid inlet 21 is smaller than the inner diameter of the filter inner cylinder 5, and the outer diameter of the filter inner cylinder 5 is smaller than the inner diameter of the filter cylinder body 1, so that the hydraulic oil must flow in the gradually narrowing space, and the larger size impurities are intercepted by the filter inner cylinder 5 to improve the filtering precision. When the hydraulic oil flows to the filter cylinder body 1, it will first enter the liquid inlet 21, then pass through the filter inner cylinder 5 in the narrowed space, and finally flow out of the filter cylinder body 1. In this process, impurities are intercepted by the filter inner cylinder 5, and finally realize high-efficiency impurity removal function to purify hydraulic oil.

[0038] For details, please refer to Figure 2 and Figure 3The connecting piece is used for connecting the first sealing plate 31 and the second sealing plate 32, and comprises first connecting ear plates 311 fixedly arranged on both sides of the first sealing plate 31 respectively, second connecting ear plates 321 fixedly arranged on both sides of the second sealing plate 32 respectively, a connecting rod 41 used for connecting the first connecting ear plates 311 and the second connecting ear plates 321, a first fixing nut 421 arranged at a position where the connecting rod 41 is connected with the first connecting ear plates 311, and a second fixing nut 422 arranged at a position where the connecting rod 41 is connected with the second connecting ear plates 321, the first connecting ear plates 311 and the second connecting ear plates 321 are respectively provided with connecting holes matched with the connecting rod 41, and the inner walls of the connecting holes are provided with smooth arc surfaces, so that the connecting reliability is achieved and the convenient dismounting mode is realized. Specifically, the first connecting ear plates 311 and the second connecting ear plates 321 are fixed on the first sealing plate 31 and the second sealing plate 32 respectively, and arc-shaped connecting holes matched with the connecting rod 41 are reserved on the edges of the first connecting ear plates 311 and the second connecting ear plates 321, the connecting rod 41 passes through the connecting holes on the two connecting ear plates and is fixedly connected by the first fixing nut 421 and the second fixing nut 422, after the nuts are screwed, the connecting rod 41 is tightly combined with the first connecting ear plates 311 and the second connecting ear plates 321, firm connection is formed between the sealing plates, and because the inner walls of the connecting holes are smooth arc surfaces, the connecting rod 41 can be easily inserted and taken out, so that the dismounting and assembling processes are facilitated.

[0039] Specifically refer to Figure 2 and Figure 3 The filter inner cylinder 5 arranged in the filter cylinder body 1 and a fixing assembly used for fixing the filter inner cylinder 5, the fixing assembly comprises a mounting check ring 10 fixedly arranged on the inner wall of the upper end face of the filter cylinder body 1, a fixing plate 51 fixedly arranged on the outer periphery of the filter inner cylinder 5, limiting columns 511 uniformly arranged on the lower end face of the fixing plate 51, and a limiting groove 101 arranged on the upper end face of the mounting check ring 10 and matched with the limiting columns 511, the mounting check ring 10, the fixing plate 51, the limiting columns 511 and the limiting groove 101 constitute a fixing device, the fixing and positioning of the filter inner cylinder 5 are realized, the mounting check ring 10 is arranged on the inner wall of the upper end face of the filter cylinder body 1, the fixing plate 51 is fixed on the outer periphery of the filter inner cylinder 5, the limiting columns 511 are uniformly arranged on the lower end face of the fixing plate 51, the limiting groove 101 is arranged on the upper end face of the mounting check ring 10 and matched with the limiting columns 511, when the filter inner cylinder 5 is assembled, the fixing action is formed between the limiting groove 101 and the limiting columns 511, so that the horizontal stability of the filter inner cylinder 5 is ensured, the deviation or falling off of the filter inner cylinder 5 is effectively prevented, and the safe operation and the filtering efficiency of the filter inner cylinder 5 are ensured.

[0040] Specifically refer to Figure 4 and Figure 5, in order to ensure that the first sealing plate 31 and the second sealing plate 32 are connected with the filter cylinder body 1, the air tightness also includes the positioning groove arranged in the inner wall of the first sealing plate 31 and the second sealing plate 32 and matched with the filter cylinder body 1, and the inner wall of the positioning groove is provided with a sealing gasket, the positioning groove 6 is arranged in the inner wall of the first sealing plate 31 and the second sealing plate 32 and matched with the filter cylinder body 1, and the sealing gasket is mounted on the inner wall, so that the air tightness between the filter cylinder body 1 and the sealing plate is effectively ensured, and the hydraulic oil is prevented from leaking during the filtration process. The design effect is that the filter cylinder body 1 is connected with the sealing plate through the positioning groove 6 and sealed by the sealing gasket, so that the hydraulic oil is prevented from leaking from the connection. When the hydraulic oil is filtered through the filter cylinder body 1, due to the perfect sealing of the sealing gasket, the hydraulic oil can only be filtered through the filter inner cylinder 5, and the leakage phenomenon does not occur.

[0041] In the embodiment, first, the liquid inlet 21 is connected with the oil outlet of the servo oil cylinder, the hydraulic oil enters the filter cylinder body 1 through the liquid inlet 21, and the clean hydraulic oil is discharged through the liquid outlet 22 after being filtered through the filter inner cylinder 5, and the liquid outlet 22 is connected with the oil inlet of the servo oil cylinder, and the clean hydraulic oil enters the servo oil cylinder to work.

[0042] When the filter inner cylinder 5 needs to be overhauled, the filter cylinder body 1 is quickly disassembled by using the connecting assembly, the filter inner cylinder 5 is taken out, the filter inner cylinder 5 is cleaned, and finally the filter inner cylinder 5 is put into the filter cylinder body 1 again, and the first sealing plate 31 and the second sealing plate 32 are connected, so that the use can be restored.

[0043] The above is the preferred embodiment of the utility model, and the person skilled in the art of the utility model can change and modify the above embodiment, therefore, the utility model is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by the person skilled in the art on the basis of the utility model belongs to the protection scope of the utility model.

Claims

1. A servo cylinder hydraulic oil return filter apparatus, characterized by: The utility model provides a filter cartridge, including filter cylinder (1), first sealing plate (31) of setting on the upper end surface of filter cylinder (1), with first sealing plate (31) intercommunication's liquid inlet (21), setting second sealing plate (32) of filter cylinder (1) lower end surface, with second sealing plate (32) intercommunication's liquid outlet (22), be used for connecting first sealing plate (31) and second sealing plate (32) connecting piece, filter inner cylinder (5) for setting in filter cylinder (1) and be used for the fixed fixed assembly of filter inner cylinder (5).

2. The hydraulic oil return filtering device of a servo oil cylinder according to claim 1, characterized in that: The liquid inlet (21) is integrally formed with the first sealing plate (31), and the liquid outlet (22) is integrally formed with the second sealing plate (32).

3. The hydraulic oil return filter device for a servo cylinder according to claim 1, characterized in that: The outer diameter of the liquid inlet (21) is less than the inner diameter of the filter inner cylinder (5), and the outer diameter of the filter inner cylinder (5) is less than the inner diameter of the filter cylinder (1).

4. The hydraulic oil return filter device for a servo cylinder according to claim 3, characterized in that: The connecting piece includes first connecting ear plates (311) fixedly arranged on both sides of the first sealing plate (31), second connecting ear plates (321) fixedly arranged on both sides of the second sealing plate (32), connecting rods (41) for connecting the first connecting ear plates (311) and the second connecting ear plates (321), first fixed nuts (421) arranged at the connecting positions of the connecting rods (41) and the first connecting ear plates (311), and second fixed nuts (422) arranged at the connecting positions of the connecting rods (41) and the second connecting ear plates (321).

5. The hydraulic oil return filter device for a servo cylinder according to claim 3, characterized in that: The first connecting ear plates (311) and the second connecting ear plates (321) are respectively provided with connecting holes matched with the connecting rods (41), and the inner walls of the connecting holes are smooth arc surfaces.

6. The hydraulic oil return filter device for a servo cylinder according to claim 2, characterized by: The fixed assembly includes mounting check rings (10) fixedly arranged on the inner walls of the upper end surfaces of the filter cylinder (1), fixed plates (51) fixedly arranged on the outer peripheries of the filter inner cylinders (5), limiting columns (511) uniformly arranged on the lower end surfaces of the fixed plates (51), and limiting grooves (101) arranged on the upper end surfaces of the mounting check rings (10) and matched with the limiting columns (511).

7. The hydraulic oil return filter device for a servo cylinder according to claim 6, characterized by: The utility model also includes positioning grooves (6) arranged on the inner walls of the first sealing plate (31) and the second sealing plate (32) and matched with the filter cylinder (1), and the inner walls of the positioning grooves (6) are provided with sealing washers.

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