CN210397324U

CN210397324U - Direct return type oil return filter

Info

Publication number: CN210397324U
Application number: CN201921013311.6U
Authority: CN
Inventors: 张海洋
Original assignee: Wuxi Haizhuo Like Hydraulic Machinery Co ltd
Current assignee: Wuxi Haizhuo Like Hydraulic Machinery Co ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-04-24
Anticipated expiration: 2029-07-01

Abstract

The utility model relates to the technical field of hydraulic oil filters, in particular to a direct return type oil return filter, which comprises a filter cover, a filter cylinder, a shell, a filter element and a buffer protection device; the buffer protection device comprises a protection device shell, a tripod, a first spring, a thimble, a flower sheet, a clamp spring, a nut and a valve core; the upper surface of the protection device shell is provided with an opening, the tripod is fixed in the protection device shell and is positioned right below the opening, the tripod is vertically provided with a sliding block matched with the shape of the opening in a sliding mode, the bottom of the sliding block is fixed to the top of the first spring, the bottom of the first spring is fixed to the ejector pin, and the first spring is always in a compressed state; the flower piece and the clamp spring are sequentially sleeved on the thimble from top to bottom and are fixed through the screw cap; the bottom of the thimble fixes the valve core. The utility model provides a direct return type oil return filter can play the self preservation of buffering when the oil pressure is very big and protect the effect, prolongs the life of filter.

Description

Direct return type oil return filter

Technical Field

The utility model relates to a hydraulic oil filter technical field, especially a direct return type oil return filter.

Background

The direct return type oil return filter is used for oil return fine filtration of a hydraulic system, and filtering metal particles generated by abrasion of elements in the hydraulic system and pollutants such as rubber impurities of a sealing piece, so that oil flowing back to an oil tank is kept clean. The filter is arranged at the top of the oil tank, the cylinder body is partially immersed in the oil tank, and the filter is provided with a bypass valve, a diffuser, a filter element pollution blocking signal transmitter and other devices, and has the advantages of compact structure, convenience in installation, high oil passing capacity, low pressure loss, convenience in filter element replacement and the like.

The utility model discloses a chinese utility model patent that application number before this company is CN208526011U discloses a miniature formula oil return filter that returns directly of RFA series, including filter cap, O type circle, filter head, pagoda, sealed pad, filter core, bypass valve, strain a section of thick bamboo and end cap, bypass valve fixed mounting is in the upper end of end cap, and the lower extreme of filter core is contradicted on the by-pass valve, and sealed pad is installed in the junction of filter head and a section of thick bamboo, and the pagoda is installed in the filter head, and the lower extreme of pagoda is contradicted in the upper end of filter core, and filter cap fixed mounting is in the upper end of filter head, and the junction at filter cap and filter head is installed to O type circle, and the middle part of filter cap is equipped with rather than the column that compresses tightly of autobody, and the lower extreme that compresses tightly the column. The beneficial effects of the utility model are that not only the structure is pleasing to the eye, be convenient for processing and equipment moreover, great improvement production and assembly efficiency, be convenient for realize the installation of filter core, improved filter housing's life effectively. However, when the pressure of hydraulic oil is high, the filter provided by the above patent has no protection device, and the filter element is likely to be crushed, so that the product is scrapped.

In view of the above, it is desirable to provide a straight return type oil return filter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a direct return type oil return filter can play the self preservation of buffering when the oil pressure is very big and protect the effect, prolongs the life of filter.

In order to achieve the purpose of the utility model, the direct return type oil return filter comprises a filter cover, a filter cylinder, a shell, a filter element and a buffer protection device;

the filter cover is fixed on the top of the filter cylinder through a bolt, a connecting part for sleeving the filter cylinder is arranged on the lower surface of the filter cover, and the filter cover is sleeved on the filter cylinder through the connecting part and fixed through the bolt;

an oil inlet is formed in the side wall of the filter cylinder, the lower surface of the filter cylinder is sleeved on the shell, an oil return joint is arranged at the bottom of the shell, the filter element is located in the shell, and the upper end of the filter element abuts against the buffer protection device;

the buffer protection device comprises a protection device shell, a tripod, a first spring, a thimble, a flower sheet, a clamp spring, a nut and a valve core; the upper surface of the protection device shell is provided with an opening, the tripod is fixed inside the protection device shell and located right below the opening, a sliding block matched with the shape of the opening is vertically arranged on the tripod in a sliding mode, the bottom of the sliding block is fixed to the top of the first spring, the bottom of the first spring is fixed to the ejector pin, and the first spring is always in a compressed state; the flower piece and the clamp spring are sequentially sleeved on the thimble from top to bottom and are fixed through a screw cap; and a valve core is fixed at the bottom of the thimble.

Preferably, a plurality of through holes are uniformly formed in the side wall of the shell of the protection device.

Preferably, the upper surface of the buffering protection device is vertically provided with a second spring, and the top of the second spring is connected with the lower surface of the filter cover.

Preferably, a ring of O-shaped rubber ring is arranged at the sleeving connection position between the filter cover and the filter cylinder.

Preferably, a plurality of reinforcing ribs are arranged on the outer side wall of the shell.

The working principle is as follows: hydraulic oil is at first through straining the oil inlet on the section of thick bamboo, enter into and strain a section of thick bamboo in, and filter through the filter core and then flow away through oil return joint, when the oil pressure is too big, first spring is shrink under the effect of hydraulic pressure oil pressure, the slider slides down on the tripod, the opening of buffering protection device upper surface is opened, hydraulic oil part enters into the protection device casing, and flow into the filter core through the through-hole on the protection device casing in, play the effect that reduces the oil pressure, the life of extension filter.

The utility model discloses a straight return type oil return filter compares with prior art and has following advantage:

(1) the utility model provides a direct return type oil return filter, the buffering protection device arranged on the device plays a certain buffering role under the condition of overlarge hydraulic oil pressure, and protects the filter;

(2) the second spring on the buffering protection device can effectively fix the buffering protection device, so that the buffering protection device cannot float upwards, and the filtering effect of hydraulic oil is enhanced;

(3) simple structure, convenient use and good filtering effect.

Drawings

Fig. 1 is a cross-sectional view of a direct return type oil return filter of the present invention;

fig. 2 is a cross-sectional view of a buffer protection device in a direct return type oil return filter according to the present invention;

FIG. 3 is an enlarged view of a portion of the oil return joint of FIG. 1;

fig. 4 is a cross-sectional view of a filter cartridge in a straight return type oil return filter of the present invention;

fig. 5 is a top view of a filter cartridge in a straight return type oil return filter according to the present invention;

fig. 6 is a cross-sectional view of a filter cover of a direct return type oil return filter according to the present invention;

fig. 7 is a top view of a filter cover in a direct return type oil return filter according to the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-7, a straight-return type oil return filter comprises a filter cover 1, a filter cartridge 4, a shell 7, a filter element 6 and a buffer protection device 5;

the filter cover 1 is fixed on the top of the filter cartridge 4 through bolts, a connecting part 18 for sleeving the filter cartridge 4 is arranged on the lower surface of the filter cover 1, and the filter cover 1 is sleeved on the filter cartridge 4 through the connecting part 18 and fixed through bolts; in order to prevent the connecting part 18 from being in rigid contact with the outer side wall of the filter cylinder 4, a ring of O-shaped rubber ring 2 is arranged at the sleeving part between the filter cover 1 and the filter cylinder 4, so that a certain protection and sealing effect is achieved;

an oil inlet 17 is formed in the side wall of the filter cartridge 4, the lower surface of the filter cartridge 4 is sleeved on the shell 7, an oil return joint 8 is arranged at the bottom of the shell 7, the filter element 6 is positioned in the shell 7, and the upper end of the filter element 6 abuts against the buffer protection device 5;

the buffer protection device 5 comprises a protection device shell 9, a tripod 10, a first spring 11, a thimble 12, a flower sheet 13, a clamp spring 14, a nut 15 and a valve core 16; an opening is formed in the upper surface of the protection device shell 9, the tripod 10 is fixed inside the protection device shell 9 and is located right below the opening, a sliding block matched with the shape of the opening is vertically arranged on the tripod 10 in a sliding mode, the bottom of the sliding block is fixed to the top of the first spring 11, the bottom of the first spring 11 is fixed to the ejector pin 12, and the first spring 11 is always in a compressed state; the flower sheet 13 and the clamp spring 14 are sequentially sleeved on the thimble 12 from top to bottom and are fixed through a screw cap 15; a valve core 16 is fixed at the bottom of the thimble 12; the main effect of the flower piece 13 is to fix the first spring 11, the screw hole is arranged on the flower piece 13, the opening pressure of the buffer protection device 5 in the work process can be improved when the valve core is screwed upwards, the opening pressure of the buffer protection device 5 in the work process can be reduced through reverse loosening, the buffer protection device 5 of the filter can be randomly allocated according to the machine type required by a client, and the clamp spring 14 is mainly used for fixing the flower piece and preventing the flower piece from falling off.

Further, evenly be equipped with a plurality of through-holes on the lateral wall of protection device casing 9, the purpose of through-hole is in flowing back the hydraulic oil in the protection device casing to filter core 6, conveniently discharges.

Further, in order to enhance the strength of the housing 7, a plurality of reinforcing ribs are arranged on the outer side wall of the housing 7.

For better fixed buffering protection device, the upper surface of buffering protection device 5 is vertical to be equipped with second spring 3, the top of second spring 3 meets the department with the lower surface of straining lid 1, so sets up, and the second spring plays the effect that compresses tightly buffering protection device 5.

Description of the operation: hydraulic oil firstly enters the filter cylinder 4 through an oil inlet on the filter cylinder 4, and is filtered by the filter element 6 and then flows away through the oil return joint 8, when the oil pressure is overlarge, the first spring 11 contracts under the action of the hydraulic oil pressure, the sliding block slides downwards on the tripod 10, an opening on the upper surface of the buffering protection device 5 is opened, the hydraulic oil partially enters the protection device shell 9, and flows into the filter element 6 through a through hole on the protection device shell 9, the function of reducing the oil pressure is achieved, and the service life of the filter is prolonged.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A straight-return type oil return filter is characterized by comprising a filter cover, a filter cylinder, a shell, a filter element and a buffer protection device;

2. The straight return oil filter of claim 1 wherein the protective device housing has a plurality of apertures formed in the side walls.

3. The direct return type oil return filter according to claim 1 or 2, wherein a second spring is vertically arranged on the upper surface of the buffering protection device, and the top of the second spring is connected with the lower surface of the filter cover.

4. The straight-return oil return filter according to claim 1 or 2, wherein a ring of O-shaped rubber ring is arranged at the sleeving joint between the filter cover and the filter cylinder.

5. The straight-return oil return filter according to claim 1 or 2, wherein the outer side wall of the housing is provided with a plurality of reinforcing ribs.