Filter element structure free of gluing connection

Abstract

The utility model discloses a filter element structure without gluing connection, which comprises two end covers and a filter element, the corresponding surfaces of the two end covers are provided with annular extrusion bulges, the filter element comprises an inner-layer stainless steel filter screen, an outer-layer stainless steel filter screen and a filter material, the two ends of the inner-layer stainless steel filter screen are respectively bent outwards to form extrusion deformation parts, and the outer-layer stainless steel filter screen is connected with the extrusion deformation parts. The annular extrusion bulge extrudes and bends the edge of the extrusion deformation part on the side part of the filter material, and the extrusion deformation part wraps the end part of the filter material. According to the utility model, the annular extrusion bulge and the annular extrusion groove are arranged on the end cover, and the end cover is extruded by external force, so that the annular extrusion bulge of the end cover is extruded between the filter material and the outer-layer stainless steel filter screen, the two ends of the filter material and the extrusion deformation part are embedded into the annular extrusion groove together, and the filter element does not need to be fixed by gluing. And the problems of bonding failure and the like caused by temperature change of the glue can be prevented. The oil filter is simple in structure, the filter element is convenient to install, and the defect that glue pollutes oil liquid can be overcome.

Description

Technical Field

[0001] The utility model relates to component parts of a filter, in particular to a filter element structure free of gluing connection. Background Art

[0002] At present, the filter element of the existing hydraulic oil filter generally includes two end covers, an outer stainless steel mesh cylinder, and an inner stainless steel mesh cylinder. A filter material is arranged between the outer stainless steel mesh cylinder and the inner stainless steel mesh cylinder. The outer stainless steel mesh cylinder, the inner stainless steel mesh cylinder and the filter material constitute the filter element body. The two ends of the filter element body are connected to the two end covers by glue bonding. When the temperature of the filtered hydraulic oil is high, the glue will be melted or softened by the high temperature. The melted glue will follow the medium into the equipment and pollute the medium. Moreover, after the glue is melted or softened, it cannot play the role of fixing the filter element body and the end covers. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to provide a filter element structure that does not require glue connection.

[0004] The purpose of the utility model is achieved through the following technical scheme: a filter element structure without glue connection, comprising two end covers and a filter element, the corresponding surfaces of the two end covers are provided with annular extrusion protrusions, the filter element comprises an inner stainless steel filter screen, an outer stainless steel filter screen and filter material, the two ends of the inner stainless steel filter screen are respectively bent outward to form an extrusion deformation portion, the annular extrusion protrusion extrude and bend the edge of the extrusion deformation portion onto the side of the filter material, and the extrusion deformation portion is wrapped around the end of the filter material.

[0005] As an improvement of the filter element structure of the utility model without glue connection, the corresponding surfaces of the two end covers are further provided with an annular extrusion groove, which is used to clamp the extrusion deformation part and the end of the filter material.

[0006] As an improvement of the filter element structure of the utility model without glue connection, the two ends of the filter material are wrapped and compressed by the extrusion deformation part, and are embedded in the annular extrusion groove together with the extrusion deformation part. The end cover is squeezed by external force, so that the annular extrusion protrusion of the end cover is squeezed from between the filter material and the outer stainless steel filter screen, so that the two ends of the filter material and the extrusion deformation part are embedded in the annular extrusion groove together, and there is no need to glue to fix the filter element. It can prevent the glue from failing due to temperature changes.

[0007] As an improvement of the filter element structure of the utility model without glue connection, the corresponding surfaces of the two end covers are also provided with embedding grooves, and the two ends of the outer stainless steel filter are embedded in the embedding grooves and fixed.

[0008] As an improvement on the filter element structure of the utility model without glue connection, the two end covers are respectively a front end cover and a rear end cover, a liquid outlet is provided in the middle of the front end cover, a sealing ring installation groove is provided on the inner side wall of the liquid outlet, an inner sealing ring is provided in the sealing ring installation groove, an extension portion extends from one end of the liquid outlet, and the extension portion extends into the filter element.

[0009] As an improvement to the filter element structure of the utility model without glue connection, the annular extrusion groove is located between the annular extrusion protrusion and the extending portion.

[0010] As an improvement of the filter element structure of the utility model without glue connection, oil enters from the outside of the filter element to the inside of the filter element, and is discharged from the liquid outlet after being filtered by the filter element.

[0011] The beneficial effect of the utility model is that the utility model sets an annular extrusion protrusion and an annular extrusion groove on the end cover, and squeezes the end cover by external force, so that the annular extrusion protrusion of the end cover is squeezed from between the filter material and the outer stainless steel filter screen, so that the two ends of the filter material and the extrusion deformation part are embedded in the annular extrusion groove together, and there is no need to glue to fix the filter element. It can prevent the glue from failing due to temperature changes. The utility model has a simple structure, is easy to install the filter element, and can prevent the disadvantage of glue contaminating the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the prior art;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 It is a cross-sectional view of the end cover of the utility model;

[0015] Figure 4 It is a schematic diagram of the filter element structure of the utility model;

[0016] The accompanying drawings are marked as: 1. end cover, 2. filter element, 3. annular extrusion protrusion, 4. annular extrusion groove, 5. embedding groove, 6. liquid outlet hole, 7. sealing ring installation groove, 8. inner sealing ring, 9. extension part, 21. inner stainless steel filter screen, 22. outer stainless steel filter screen, 23. filter material, 24. extrusion deformation part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0020] like Figure 2-Figure 4 As shown, a filter element structure without glue connection includes two end covers 1 and a filter element 2, and the corresponding surfaces of the two end covers 1 are provided with an annular extrusion protrusion 3. The filter element 2 includes an inner stainless steel filter screen 21, an outer stainless steel filter screen 22 and a filter material 23. The filter material is located between the inner stainless steel filter screen 21 and the outer stainless steel filter screen 22. The two ends of the inner stainless steel filter screen 21 are respectively bent outward to form an extrusion deformation portion 24. The annular extrusion protrusion 3 extrude and bend the edge of the extrusion deformation portion 24 on the side of the filter material 23, and the extrusion deformation portion 24 is wrapped around the end of the filter material 23.

[0021] Preferably, the corresponding surfaces of the two end caps 1 are further provided with an annular extrusion groove 4. The annular extrusion groove 4 is used to clamp the extrusion deformation portion 24 and the end of the filter material 23. When the filter material 23 is extruded, the extruded part of the filter material 23 is compressed.

[0022] Preferably, both ends of the filter material 23 are wrapped and compressed by the extrusion deformation part 24, and are embedded in the annular extrusion groove 4 together with the extrusion deformation part 24. By extruding the end cap 1 with external force, the annular extrusion protrusion 3 of the end cap 1 is squeezed from between the filter material 23 and the outer stainless steel filter screen 22, so that both ends of the filter material 23 and the extrusion deformation part 24 are embedded in the annular extrusion groove 4 together, and there is no need to glue the filter element. This can prevent the glue from failing due to temperature changes.

[0023] Preferably, corresponding surfaces of the two end covers 1 are further provided with embedding grooves 5, and both ends of the outer stainless steel filter screen 22 are embedded in the embedding grooves 5 and fixed.

[0024] Preferably, the two end covers 1 are respectively a front end cover and a rear end cover, a liquid outlet 6 is provided in the middle of the front end cover, a sealing ring mounting groove 7 is provided on the inner side wall of the liquid outlet 6, an inner sealing ring 8 is provided in the sealing ring mounting groove 7, an extension portion 9 extends from one end of the liquid outlet 6, and the extension portion 9 extends into the filter element.

[0025] Preferably, the annular extrusion groove 4 is located between the annular extrusion protrusion 3 and the protruding portion 9 .

[0026] Preferably, the oil enters the filter element 2 from the outside to the inside of the filter element 2 , and is filtered by the filter element 2 and then discharged from the liquid outlet 6 .

[0027] The utility model provides an annular extrusion protrusion and an annular extrusion groove on the end cover, and extrudes the end cover by external force, so that the annular extrusion protrusion of the end cover is squeezed from between the filter material and the outer stainless steel filter screen, so that both ends of the filter material and the extrusion deformation part are embedded in the annular extrusion groove together, and there is no need to glue to fix the filter element. It can prevent the glue from failing due to temperature changes. The utility model has a simple structure, is easy to install the filter element, and can prevent the disadvantage of glue contaminating the oil.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and structures of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter element structure without glue connection, characterized in that: It includes two end covers and a filter element, and the corresponding surfaces of the two end covers are provided with annular extrusion protrusions. The filter element includes an inner stainless steel filter screen, an outer stainless steel filter screen and filter material. The two ends of the inner stainless steel filter screen are respectively bent outward to form an extrusion deformation part. The annular extrusion protrusion extrude and bend the edge of the extrusion deformation part on the side of the filter material, and the extrusion deformation part is wrapped around the end of the filter material.

2. The filter element structure without glue connection according to claim 1, characterized in that: The corresponding surfaces of the two end covers are also provided with an annular extrusion groove.

3. The filter element structure without glue connection according to claim 2, characterized in that: Both ends of the filter material are wrapped and compressed by the extrusion deformation portion, and are embedded in the annular extrusion groove together with the extrusion deformation portion.

4. The filter element structure without glue connection according to claim 1, characterized in that: The corresponding surfaces of the two end covers are also provided with embedding grooves, and the two ends of the outer stainless steel filter screen are embedded in the embedding grooves and fixed.

5. The filter element structure without glue connection according to claim 2, characterized in that: The two end covers are respectively a front end cover and a rear end cover, a liquid outlet is provided in the middle of the front end cover, a sealing ring installation groove is provided on the inner side wall of the liquid outlet, an inner sealing ring is provided in the sealing ring installation groove, an extension portion extends from one end of the liquid outlet, and the extension portion extends into the filter element.

6. The filter element structure for glue-free connection according to claim 5, characterized in that: The annular extrusion groove is located between the annular extrusion protrusion and the protruding portion.

7. The filter element structure without glue connection according to claim 5, characterized in that: The oil enters the filter element from the outside and is then filtered by the filter element and then discharged from the liquid outlet.

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