Oil filter with composite check valve

Abstract

The utility model discloses an engine oil filter with a composite check valve. The engine oil filter comprises a shell barrel, a shell top cover, a filter element and the composite check valve. The composite check valve comprises a first check valve and a second check valve, the first check valve is arranged between the shell top cover and the filter element, a sealing ring protruding upwards is arranged on the top face of the first check valve around the round edge of the first check valve, a protruding edge is formed at the bottom of the shell top cover, and the protruding edge abuts against the upper portion of the round edge and abuts against the side of the sealing ring. The sealing effect is better, and the stress burden of a peripheral structure is reduced through supporting of the convex edge; the second check valve is of an elastic annular structure expanding outwards from the shell top cover, and the outer circle edge of the second check valve abuts against the side wall of the shell barrel. When the engine flames out, the first check valve and the second check valve can reset respectively and play a non-return role independently, and even if one of the check valves fails accidentally due to the influence of aging, abrasion or high temperature and the like, the other check valve can provide backup guarantee.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil filter, especially an oil filter with a composite check valve. BACKGROUND

[0002] The oil filter is a filter commonly used in the automobile engine, and the main function is to filter the pollutants and metal particles and other impurities in the engine oil, maintain the cleanliness and stability of the engine oil, and thus prolong the service life of the engine, the oil filter is usually composed of a shell and a filter element, the filter paper in the filter element can filter out the above-mentioned impurities in the engine oil, prevent them from entering the engine interior, and prevent the engine from being worn and corroded.

[0003] In the conventional oil filter, a check valve is attached to the bottom surface of the shell top cover to cover each oil inlet hole on the shell top cover, the check valve is generally made of elastic material, when the engine is working, the engine oil flowing into the oil inlet hole can open the check valve by oil pressure and enter, and finally be guided out of the shell through the filtration of the filter element, the function of the check valve is that when the engine is stopped, the check valve can reset to the attached shell by its elasticity, block the engine oil in the filter from flowing back to the oil inlet hole, and ensure that a certain amount of engine oil is always retained in the oil filter, which can provide engine oil lubrication immediately when the engine starts, and effectively prevent the occurrence of air grinding phenomenon.

[0004] However, the check valve is only composed of a single elastic piece, and as the use time increases, the single elastic piece may lack sufficient elasticity due to aging, wear or high temperature, resulting in poor sealing, once the check valve fails, the engine oil flows back to the oil inlet hole and the air grinding phenomenon occurs, which will cause damage to the engine oil pump and engine parts, and the conventional check valve lacks backup protection. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model aims to provide an oil filter with a composite check valve to solve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides an oil filter with a composite check valve, which comprises a shell cylinder, a shell top cover, a filter element and a composite check valve.

[0008] The shell cylinder constitutes an open-top cylindrical accommodating space; the shell top cover is provided with a central pipeline opening and an oil inlet hole arranged around the central pipeline opening, and covers the opening of the shell cylinder; the filter element is accommodated in the shell cylinder, and a central pipeline is arranged in the filter element, the upper portion of the central pipeline is connected to the central pipeline opening, so that the engine oil entering from the oil inlet hole can pass through the filter element and flow out from the central pipeline opening of the shell top cover; the composite check valve comprises a first check valve and a second check valve, the first check valve is arranged between the shell top cover and the filter element, and the second check valve is fixed above the filter element.

[0009] The first check valve is a bowl-shaped structure with elasticity, a sealing ring protruding upward is arranged around the circular edge of the top surface of the first check valve, a convex edge is formed at the bottom of the shell top cover, the upper portion of the circular edge of the first check valve abuts against the convex edge, and the side portion of the sealing ring abuts against the convex edge, so as to block the backflow of the engine oil to the oil inlet hole through the first check valve; the second check valve is an elastic annular structure expanding outward from the shell top cover, and the outer circular edge of the second check valve abuts against the side wall of the shell cylinder, so as to block the backflow of the engine oil to the oil inlet hole through the second check valve.

[0010] Preferably, the cross sections of the convex edge and the sealing ring at the positions where the convex edge and the sealing ring contact each other in the radial direction of the shell top cover are circular arc surfaces.

[0011] Preferably, the first check valve is open at the center, is sleeved on the connection between the central pipeline opening and the central pipeline through the opening, and gradually decreases in thickness from the center to the circular edge.

[0012] Preferably, the inner side of the second check valve away from the outer circular edge protrudes upward to form a supporting ring, the supporting ring abuts against the bottom of the first check valve, and the abutting position of the first check valve and the supporting ring is located in the region between the circular edge of the first check valve and the center of the first check valve.

[0013] Preferably, the top of the filter element is provided with an upper mounting plate, the upper mounting plate is provided with a mounting groove, the bottom of the second check valve downwardly extends to form a fixing ring for being inserted into the mounting groove, and the fixing ring is located below the supporting ring.

[0014] Preferably, the cross section of the supporting ring in the radial direction of the second check valve is a circular arc surface.

[0015] Preferably, the first check valve and the second check valve are silicone valve bodies or rubber valve bodies.

[0016] The technical effects achieved by the technical scheme of the utility model mainly include:

[0017] The oil filter with the composite check valve can be used, when the engine is stopped, the first check valve and the second check valve can be reset respectively to block the passage of the oil to the filter element through the oil inlet hole and the passage between the side wall and the filter element, the first check valve and the second check valve can independently play the check valve effect, even if one of them is unexpectedly failed due to aging, wear or high temperature, the other can provide backup protection to prevent the oil from flowing back to the oil inlet hole and the phenomenon of air grinding, and long-term check valve protection effect is provided for the oil pump and engine parts;

[0018] The circular edge of the first check valve and the sealing ring are respectively in abutment with the convex edge, which helps to enhance the sealing effect of the first check valve, and the convex edge can provide support for the peripheral structure of the first check valve, reduce the stress burden of the peripheral structure of the first check valve, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A front view of the oil filter with the composite check valve is provided in the utility model;

[0020] Figure 2 A structure split view of the oil filter is provided;

[0021] Figure 3 A sectional view of the oil filter corresponding to the AA' section line in Figure 1 ;

[0022] Figure 4 A local enlarged view of the circular dotted line frame area A in Figure 3 ;

[0023] Figure 5 A composite check valve state schematic view when the oil entering from the oil inlet hole passes through the filter element and enters the central pipeline in Figure 3 ;

[0024] The various reference signs in the above drawings are as follows:

[0025] The shell cylinder 1, the side wall 11 of the shell cylinder;

[0026] The shell top cover 2, the central pipeline port 201, the oil inlet hole 202, the convex edge 21;

[0027] The filter element 3, the central pipeline 301, the upper mounting plate 31, the mounting groove 310;

[0028] The first check valve 4, the circular edge 4a of the first check valve, the sealing ring 41;

[0029] The second check valve 5, the outer circular edge 5a of the second check valve, the support ring 51, the fixed ring 52. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear, the specific implementation manners of the utility model are described in detail below in combination with the drawings. The examples of these preferred implementation manners are exemplified in the drawings. The implementation manners of the utility model shown in the drawings and described according to the drawings are merely exemplary, and the utility model is not limited to these implementation manners.

[0031] In order to avoid the utility model being obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme according to the utility model are shown in the drawings, and other details not closely related are omitted.

[0032] As shown in Figures 1 to 3 The utility model embodiment provides a filter for oil with composite check valve, it includes shell cylinder 1, shell top 2, filter core 3 and composite check valve.

[0033] The shell cylinder 1 constitutes the cylindrical accommodating space of upper opening;

[0034] The shell top 2 is set with center pipeline mouth 201 and the oil inlet hole 202 around center pipeline mouth 201 is arranged, the shell top 2 covers on the opening of shell cylinder 1;

[0035] As shown in Figure 2 And Figure 3 The filter core 3 is accommodated in shell cylinder 1, the center pipeline 301 is set in the filter core 3, as shown in Figure 3 And Figure 5 The dashed arrow in Figure 5 The upper side of center pipeline 301 is connected with center pipeline mouth 201, for making the oil entering from oil inlet hole 202 can pass through filter core 3 and enter center pipeline 301, and flows out from center pipeline mouth 201 on shell top 2;

[0036] The composite check valve includes first check valve 4 and second check valve 5, the first check valve 4 is arranged between shell top 2 and filter core 3, and the second check valve 5 is fixed above filter core 3;

[0037] As shown in Figure 3 And Figure 4As shown in the drawings, the first check valve 4 is a bowl-shaped structure with elasticity, that is, the first check valve 4 is gradually concave downward from its circular edge 4a to the center thereof, and a sealing ring 41 is arranged on the top surface of the first check valve 4 around the circular edge 4a and protrudes upward, and a convex edge 21 is formed on the bottom of the shell top cover 2, the convex edge 21 abuts against the upper side of the circular edge 4a of the first check valve 4, and the convex edge 21 also abuts against the side of the sealing ring 41 to block the backflow of the engine oil through the first check valve 4 to the oil inlet hole 202.

[0038] The second check valve 5 is an elastic annular structure that expands outward from the shell top cover 2, and the outer circular edge 5a of the second check valve 5 abuts against the side wall 11 of the shell cylinder 1 to block the backflow of the engine oil through the second check valve 5 to the oil inlet hole 202.

[0039] By contrast Figure 3 And Figure 5 As shown in the drawings, based on the above-mentioned composite check valve of the oil filter, when the engine is working, the engine oil entering from the oil inlet hole 202 can sequentially push open the first check valve 4 and the second check valve 5 to enter, the peripheral structure of the first check valve 4 is folded downward, the circular edge 4a of the first check valve 4 is separated from the contact of the sealing ring 41 and the convex edge 21, and the passage from the oil inlet hole 202 to the filter element 3 is opened, and the peripheral structure of the second check valve 5 is folded downward, the outer circular edge 5a of the second check valve 5 is separated from the contact of the side wall 11 of the shell cylinder 1, and the passage between the side wall 11 and the filter element 3 is opened, and then the engine oil can pass through the filter element 3 for filtration and finally flow out from the central pipeline 301 in the filter element 3 to the central pipeline port 201;

[0040] When the engine stops working, the first check valve 4 and the second check valve 5 can be reset respectively to block the passage of the engine oil to the filter element 3 through the above-mentioned oil inlet hole 202 and the passage between the side wall 11 and the filter element 3, and the first check valve 4 and the second check valve 5 can independently play the check valve role, that is, even if one of them is unexpectedly failed due to aging, wear or high temperature, etc., the other one can also provide backup protection to prevent the backflow of the engine oil to the oil inlet hole 202 and the occurrence of the air grinding phenomenon, thereby providing long-term check valve protection effect for the oil pump and engine parts.

[0041] Since the circular edge 4a of the first check valve 4 and the sealing ring 41 abut against the convex edge 21 in the extending directions perpendicular to each other, it is helpful to enhance the sealing effect of the first check valve 4, and the convex edge 21 can be used to provide support for the peripheral structure of the first check valve 4, thereby reducing the stress burden of the peripheral structure of the first check valve 4 and prolonging the service life thereof.

[0042] The outer circular edge 5a of the second check valve 5 is provided with a downward extending portion closely attached to the surface of the side wall 11, which further improves the sealing effect of the second check valve 5.

[0043] In the radial direction of the top cover 2, the cross section of the convex edge 21 and the contact position of the sealing ring 41 are both circular arc, which makes the sealing ring 41 easily slide along the convex edge 21, and the sealing ring 41 can quickly reset to play the check effect when the engine is shut down.

[0044] Specifically, the first check valve 4 is opened at the center, and is fixed by being sleeved on the connection between the center pipe port 201 and the center pipe 301. The thickness of the first check valve 4 gradually decreases from the center to the circular edge 4a, so that the peripheral structure of the first check valve 4 is easy to fold.

[0045] Further, the second check valve 5 is upwardly protruded from the inner side of the outer circular edge 5a to form a supporting ring 51, which abuts against the bottom of the first check valve 4. The abutting position of the first check valve 4 and the supporting ring 51 is located between the circular edge 4a of the first check valve 4 and the center of the first check valve 4. The supporting ring 51 can provide support for the first check valve 4, reduce the stress burden of the peripheral structure of the first check valve 4, prolong the service life, and not affect the oil passing through by selecting the appropriate support point position.

[0046] In the radial direction of the second check valve 5, the cross section of the supporting ring 51 is a circular arc, which makes the first check valve 4 easy to fold with the supporting ring 51 as the fulcrum, and helps to protect the first check valve 4.

[0047] As an exemplary installation mode of the second check valve 5, the top of the filter element 3 is provided with an upper installation plate 31, and the upper installation plate 31 is provided with an installation groove 310. The bottom of the second check valve 5 is downwardly extended to form a fixing ring 52 for being inserted into the installation groove 310, and the fixing ring 52 is located below the supporting ring 51.

[0048] Exemplarily, the first check valve 4 and the second check valve 5 are silicone valve bodies or rubber valve bodies, which are suitable for the mixed oil in the oil filter and the environment with a certain temperature.

[0049] It is to be noted that, as used in this document, the term "indicia" is intended to encompass any type of data, information, or other content, whether in the form of text, graphics, images, video, audio, or otherwise. It is to be further noted that, as used in this document, the terms "coupled" and "connected," along with derivatives thereof, can be used to mean one or more of the following: in electrical communication with; physically contacting with; in long-distance communication with; and / or not in direct contact with. It is to be further noted that, as used in this document, the terms "include" and "comprise," along with derivatives thereof, can be used to indicate inclusion of one or more elements or steps; these terms are not intended to, nor do they, imply that any or all functionality can be included with any or all elements or steps; and / or any such elements or steps are each independently repeatable both logically and temporally. In addition, the term "exemplary" is intended to refer to a non-limiting example, embodiment, or aspect. Moreover, the term "in response to" is intended to mean that a particular action is performed in response to one or more events or conditions, but not necessarily directly or immediately in response to the one or more events or conditions.

[0050] The foregoing is merely illustrative of the principles of this application and various modifications can be made by those skilled in the art, without departing from the spirit and scope of the application. Accordingly, the above description is not intended to limit the scope of the application.

Claims

1. An oil filter with a composite check valve, characterized in that, include: The outer shell (1) forms a cylindrical receiving space with an opening at the top; The outer shell top cover (2) has a central pipe opening (201) and an oil inlet hole (202) arranged around the central pipe opening (201). The outer shell top cover (2) covers the opening of the outer shell cylinder (1). The filter element (3) is housed in the outer shell cylinder (1). The filter element (3) has a central pipe (301) in it. The upper part of the central pipe (301) is connected to the central pipe opening (201) so that the oil entering from the oil inlet (202) can pass through the filter element (3) into the central pipe (301) and flow out from the central pipe opening (201) on the top cover of the outer shell (2). A composite check valve, comprising a first check valve (4) and a second check valve (5), wherein the first check valve (4) is disposed between the top cover (2) of the outer shell and the filter element (3), and the second check valve (5) is fixed above the filter element (3); The first check valve (4) has an elastic bowl-shaped structure. A sealing ring (41) with an upward protrusion is provided on the top surface of the first check valve (4) around its circular edge (4a). A protruding edge (21) is formed at the bottom of the outer shell top cover (2). The protruding edge (21) abuts against the top of the circular edge (4a) of the first check valve (4) and against the side of the sealing ring (41) to prevent the oil from flowing back to the oil inlet hole (202) through the first check valve (4). The second check valve (5) is an elastic annular structure that expands outward from the top cover (2) of the outer casing. The outer edge (5a) of the second check valve (5) abuts against the side wall (11) of the outer casing (1) to prevent the oil from flowing back to the oil inlet (202) through the second check valve (5).

2. The oil filter with a composite check valve according to claim 1, characterized in that, Along the radial direction of the top cover (2), the cross-section of the convex edge (21) and the sealing ring (41) at the point of contact is a circular arc surface.

3. The oil filter with a composite check valve according to claim 1, characterized in that, The first check valve (4) has an opening at its center, and is fixed by fitting the opening around the connection between the central pipe opening (201) and the central pipe (301). The thickness of the first check valve (4) gradually decreases from its center toward the circular edge (4a).

4. The oil filter with a composite check valve according to claim 1, characterized in that, The second check valve (5) has a support ring (51) protruding upward on the inner side away from its outer circular edge (5a). The support ring (51) abuts against the bottom of the first check valve (4). The abutment point between the first check valve (4) and the support ring (51) is located in the area between the circular edge (4a) of the first check valve (4) and the center of the first check valve (4).

5. The oil filter with a composite check valve according to claim 4, characterized in that, The filter element (3) is provided with an upper mounting plate (31) on its top. The upper mounting plate (31) has an installation groove (310) on it. The bottom of the second check valve (5) extends downward to form a fixing ring (52) for insertion into the installation groove (310). The fixing ring (52) is located below the support ring (51).

6. The oil filter with a composite check valve according to claim 4, characterized in that, Along the radial direction of the second check valve (5), the cross-section of the support ring (51) is an arc surface.

7. The oil filter with a composite check valve according to any one of claims 1 to 6, characterized in that, The first check valve (4) and the second check valve (5) are silicone valve bodies or rubber valve bodies.

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