Filtering device

Abstract

The utility model discloses a filtering device which comprises an upper installation assembly and a filter element assembly installed on the upper installation assembly, the upper installation assembly is installed on a shell so that the filter element assembly can be fixed in an installation cavity, and the upper installation assembly comprises an upper connector and a lower connector coaxially connected with the upper connector. The upper connector comprises an upper end body, a first connecting ring, a second connecting ring and a third connecting ring, the first connecting ring, the second connecting ring and the third connecting ring are sequentially and integrally formed on the peripheral face of the upper end body from top to bottom, the annular upper end face of the shell is covered with the first connecting ring, the second connecting ring is inserted into the upper end of the shell, and the third connecting ring is inserted into the upper end of the shell. And the sealing ring is hermetically attached to the inner side wall of the shell. Sealing is conducted by means of a certain interference amount between the multiple connecting rings and the shell, and due to the fact that no rubber ring is involved, the cost in the aspects of design, material, installation, experiment and the like of the sealing piece is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of engine oil filtering devices, in particular to a filtering device. Background Art

[0002] Currently, most oil filters on the market are sealed with rubber O-rings. Since O-rings are rubber parts, their cost accounts for a large proportion compared to other filter components, including: material, design, mold, production, measurement, experimental verification, installation and other costs; and rubber parts also have a destructive effect on the earth's environment to a certain extent. Since rubber parts will age over time, there will also be certain negative effects on component recycling. Summary of the invention

[0003] The utility model aims to provide a filtering device without sealing ring, which greatly reduces the cost in design, material, installation, experiment and the like.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a filter device, which is used to filter engine oil, the flow channel of the engine oil is arranged in a shell body, the upper end of the shell is open and forms an installation cavity for installing the filter device, the filter device comprises: an upper mounting assembly, a filter element assembly installed on the upper mounting assembly, the upper mounting assembly is installed on the shell body so that the filter element assembly is fixed in the installation cavity, the upper mounting assembly comprises an upper connecting head and a lower connecting head coaxially connected to the upper connecting head, the upper connecting head comprises an upper end body, and a first connecting ring, a second connecting ring and a third connecting ring integrally formed on the outer peripheral surface of the upper end body in sequence from top to bottom, the first connecting ring cover is arranged on the annular upper end surface of the shell body, the second connecting ring is inserted in the upper end portion of the shell, the third connecting ring is inserted in the upper end portion of the shell body, and is sealed and fitted with the inner side wall of the shell.

[0005] In another embodiment, the filter element assembly includes a central tube with hollow holes penetrating radially on the peripheral surface, filter paper wrapped on the outer peripheral surface of the central tube, a filter element upper cover fixedly sleeved on the upper end of the central tube and covering the upper end surface of the filter paper, and a filter element lower cover fixed on the lower end of the central tube and covering the lower end surface of the filter paper, and the lower connector axially penetrates and connects to the central tube. The filter element upper cover and the filter element lower cover respectively cover the upper end surface and the lower end surface of the filter element, so that the engine oil flows from the outer peripheral surface of the filter paper into the central tube, so that the engine oil can be fully filtered, and the lower connector is coaxial with the central tube and sleeved, which is convenient for the rapid assembly of the upper mounting assembly and the filter element assembly.

[0006] In another embodiment, a positioning convex ring is formed on the lower end surface of the filter element lower cover, the positioning convex ring corresponds to the oil inlet at the bottom of the installation cavity and has a gap with the oil inlet, which is the first gap, and a gap is formed between the lower end surface of the filter element lower cover and the bottom of the installation cavity, which is the second gap. The first gap and the second gap provide a flow channel for the oil to flow to the outer peripheral surface of the filter paper, and the flow directions of the oil in the first gap and the second gap are perpendicular, which can effectively reduce the oil flow rate and fully filter the oil.

[0007] In another embodiment, a plurality of first protrusions are formed on the circumferential surface of the filter element lower cover, and the first protrusions provide a gap between the circumferential surface of the filter element lower cover and the inner side wall of the housing, and the gap is the third gap. The flow direction of the engine oil in the third gap is perpendicular to the second gap, which can further reduce the flow rate of the engine oil and further filter the engine oil.

[0008] In another embodiment, the inner side of the upper body has a second protrusion in the shape of a bowl and protruding downward, the lower end of the second protrusion is connected to the upper end of the lower connecting head and has an inner tube inside that is connected to the hollow lower connecting head, and the unfiltered engine oil passes through the first gap, the second gap, the third gap, the filter paper, the center tube, the lower connecting head and the inner tube in sequence, and the unfiltered engine oil flows from the outer circumferential surface of the filter paper to the inner circumferential surface of the filter paper to complete the filtration.

[0009] In another embodiment, an inner wall of the installation cavity of the shell is provided with an internal thread, and an outer peripheral surface of the lower connecting head below the third connecting ring is formed with an external thread that cooperates with the installation cavity of the shell. The filter device and the shell are fixedly connected by the thread. After the filter device is screwed into the shell, the third connecting ring and the inner wall of the shell are also sealed.

[0010] In another embodiment, the filter element upper cover sealing sleeve is arranged on the lower connecting head, and the upper end surface of the filter element upper cover is sealed on the lower end surface of the upper end body.

[0011] In another embodiment, a plurality of third protrusions are formed on the outer circumferential surface of the filter element upper cover, and the third protrusions create a gap between the circumferential surface of the filter element upper cover and the inner wall of the shell. The gap is the fourth gap. The third protrusions ensure that the filter element upper cover can contact the inner wall of the shell and prevent the filter element upper cover and the inner wall of the shell from being over-limited.

[0012] In another embodiment, a downwardly extending positioning protrusion is formed on the outer peripheral surface of the filter element upper cover, and a slot or mark corresponding to the positioning protrusion is provided on the inner wall of the shell, so that the filter device can be installed on the shell more quickly and accurately.

[0013] Due to the application of the above technical scheme, the utility model has the following advantages compared with the prior art: the utility model relies on a certain interference amount between its own multiple connecting rings and the shell to perform sealing. Since there is no rubber ring involved, the cost of design, material, installation, and experimentation on the seal is greatly reduced; it also has a certain positive effect on rubber recycling and environmental protection, and meets the current requirements of low-carbon and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is the front view of the utility model after being installed in the housing;

[0016] Figure 3 for Figure 2 Section view AA in;

[0017] Figure 4 for Figure 3 Magnified view at B in the middle;

[0018] Figure 5 for Figure 3 Magnified view at center C. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, the filter device is used to filter the engine oil, and the flow channel of the engine oil is arranged in the housing 0, the upper end of the housing 0 is open and forms a mounting cavity for mounting the filter device. The filter device comprises: an upper mounting assembly 1, and a filter element assembly 2 mounted on the upper mounting assembly 1.

[0020] Specifically

[0021] The upper mounting assembly 1 is installed on the shell 0 so that the filter element assembly 2 is fixed in the mounting cavity. The upper mounting assembly 1 includes an upper connector 11 and a lower connector 12 coaxially connected to the upper connector 11. The upper connector 11 includes an upper end body 13, and a first connecting ring 14, a second connecting ring 15 and a third connecting ring 16 integrally formed on the outer peripheral surface of the upper end body 13 in sequence from top to bottom. The first connecting ring 14 is covered on the annular upper end surface of the shell 0, the second connecting ring 15 is inserted into the upper end portion of the shell 0, and the third connecting ring 16 is inserted into the upper end portion of the shell 0 and is sealed and fitted with the inner wall of the shell 0.

[0022] The filter element assembly 2 includes a central tube 21 with hollow holes penetrating radially on the circumference, a filter paper 22 wrapped on the outer circumference of the central tube 21, a filter element upper cover 23 fixedly sleeved on the upper end of the central tube 21 and covering the upper end of the filter paper 22, a filter element lower cover 24 fixed on the lower end of the central tube 21 and completely covering the lower end of the filter paper 22, and a lower connector 12 axially penetrates and is connected to the central tube 21. The filter element upper cover 23 and the filter element lower cover 24 respectively cover the upper end and lower end of the filter element, so that the engine oil flows from the outer circumference of the filter paper 22 into the central tube 21, so that the engine oil can be fully filtered, and the lower connector 12 is coaxial with the central tube 21 and sleeved, which is convenient for the rapid assembly of the upper mounting assembly 1 and the filter element assembly 2.

[0023] A positioning convex ring 25 is formed on the lower end surface of the filter element lower cover 24, and the positioning convex ring 25 corresponds to the oil inlet 01 at the bottom of the installation cavity and has a gap between the oil inlet 01, which is the first gap 31. There is a gap between the lower end surface of the filter element lower cover 24 and the bottom of the installation cavity, which is the second gap 32. The first gap 31 and the second gap 32 provide a flow channel for the engine oil to flow to the outer peripheral surface of the filter paper, and the flow directions of the engine oil in the first gap 31 and the second gap 32 are perpendicular, which can effectively reduce the oil flow rate and fully filter the engine oil.

[0024] A plurality of first protrusions 41 are formed on the circumferential surface of the filter element lower cover 24. The first protrusions 41 provide a gap between the circumferential surface of the filter element lower cover 24 and the inner wall of the housing 0. The gap is the third gap 33. The flow directions of the engine oil in the third gap 33 and the second gap 32 are perpendicular, which can further effectively reduce the flow rate of the engine oil and further filter the engine oil.

[0025] The filter element upper cover 23 is sealed on the lower connector 12 , and the upper end surface of the filter element upper cover 23 is sealed on the lower end surface of the upper body 13 .

[0026] The inner wall of the installation cavity of the housing 0 is provided with an internal thread 02, and the outer peripheral surface of the lower connector 12 below the third connecting ring 16 is formed with an external thread 18 that matches the installation cavity of the housing 0. The filter device is fixedly connected to the housing 0 through the threaded connection. After the filter device is screwed into the housing 0, the third connecting ring 16 and the inner wall of the housing 0 are also sealed. The inner side of the upper end body 13 has a bowl-shaped second protrusion 42 that protrudes downward. The lower end of the second protrusion 42 is connected to the upper end of the lower connector 12 and has an inner tube 17 that communicates with the hollow lower connector 12. The unfiltered oil passes through the first gap 31, the second gap 32, the third gap 33, the filter paper 22, the center tube 21, the lower connector 12 and the inner tube 17 in sequence. The upper port of the inner tube 17 is the outlet of the filtered oil. The unfiltered oil flows from the outer peripheral surface of the filter paper 22 into the inner peripheral surface of the filter paper 22 to complete the filtration.

[0027] A plurality of third protrusions 43 are formed on the outer peripheral surface of the filter element upper cover 23. The third protrusions 43 create a gap between the peripheral surface of the filter element upper cover 23 and the inner wall of the shell 0. The gap is the fourth gap 34. The third protrusions 43 ensure that the filter element upper cover 23 can contact the inner wall of the shell 0 and prevent the filter element upper cover 23 from being over-limited with the inner wall of the shell 0.

[0028] A downwardly extending positioning protrusion 44 is formed on the outer peripheral surface of the filter element upper cover 23, and a slot or mark corresponding to the positioning protrusion 44 is provided on the inner wall of the housing 0, so that the filter device can be installed on the housing 0 more quickly and accurately.

[0029] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A filter device for filtering engine oil, wherein a flow channel of the engine oil is provided in a housing, an upper end of the housing is open and has a mounting cavity for mounting the filter device, and the filter device comprises: An upper mounting assembly and a filter element assembly mounted on the upper mounting assembly, wherein the upper mounting assembly is mounted on the shell so that the filter element assembly is fixed in the mounting cavity, and is characterized in that: the upper mounting assembly includes an upper connecting head and a lower connecting head coaxially connected to the upper connecting head, the upper connecting head includes an upper end body, and a first connecting ring, a second connecting ring and a third connecting ring integrally formed on the outer peripheral surface of the upper end body in sequence from top to bottom, the first connecting ring cover is arranged on the annular upper end surface of the shell, the second connecting ring is inserted into the upper end portion of the shell, and the third connecting ring is inserted into the upper end portion of the shell and is sealed and fitted with the inner side wall of the shell.

2. The filtering device according to claim 1, characterized in that: The filter element assembly includes a central tube with hollow holes radially extending through the circumference, filter paper wrapped on the outer circumference of the central tube, a filter element upper cover fixedly sleeved on the upper end of the central tube and covering the upper end of the filter paper, and a filter element lower cover fixed on the lower end of the central tube and covering the lower end of the filter paper, and the lower connector axially penetrates and is connected to the central tube.

3. The filtering device according to claim 2, characterized in that: A positioning convex ring is formed on the lower end surface of the filter element lower cover, and the positioning convex ring corresponds to the oil inlet at the bottom of the installation cavity and has a gap with the oil inlet, which is the first gap. There is a gap between the lower end surface of the filter element lower cover and the bottom of the installation cavity, which is the second gap.

4. The filtering device according to claim 3, characterized in that: A plurality of first protrusions are formed on the circumferential surface of the filter element lower cover, and the first protrusions provide a gap between the circumferential surface of the filter element lower cover and the inner side wall of the housing, and the gap is a third gap.

5. The filtering device according to claim 4, characterized in that: The inner side of the upper end body has a second protrusion in the shape of a bowl and protruding downward, the lower end of the second protrusion is connected to the upper end of the lower connecting head and has an inner tube inside that is connected to the hollow lower connecting head, and the unfiltered engine oil passes through the first gap, the second gap, the third gap, the filter paper, the center tube, the lower connecting head and the inner tube in sequence, and the unfiltered engine oil flows from the outer circumferential surface of the filter paper into the inner circumferential surface of the filter paper to complete the filtration.

6. The filtering device according to claim 1, characterized in that: An inner side wall of the installation cavity of the shell is provided with an internal thread, and an outer peripheral surface of the lower connecting head below the third connecting ring is formed with an external thread matching with the installation cavity of the shell.

7. The filtering device according to claim 1, characterized in that: The filter element upper cover sealing sleeve is arranged on the lower connecting head.

8. The filtering device according to claim 2, characterized in that: A plurality of third protrusions are formed on the outer peripheral surface of the filter element upper cover, and the third protrusions allow a gap to be spaced between the peripheral surface of the filter element upper cover and the inner side wall of the shell, and the gap is a fourth gap.

9. The filtering device according to claim 1, characterized in that: A positioning protrusion extending downward is formed on the outer peripheral surface of the filter element upper cover.

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