Filter element with positioning characteristic and filter

Abstract

The utility model discloses a filter element with a positioning characteristic and a filter, the filter element comprises an annular filter medium, a first end cover and a second end cover, the first end cover and the second end cover are connected to the two ends of the annular filter medium, and the annular filter medium is provided with a central cavity arranged around the central axis of the annular filter medium; an oil return plug is eccentrically arranged on the end face of the first end cover, provided with a positioning outline extending outwards and used for being matched with an internal component of the filter assembly, so that when the filter element is installed in the filter assembly, the oil return plug enters and seals the oil return channel. According to the technical scheme, an operator can guide by means of visual alignment and the positioning contour, the situation that the position of the oil return plug is adjusted in a rotating mode is avoided, the filter element can be installed without too much operation experience, meanwhile, under the condition that the filter element is not correctly positioned, the screw cap and the assembly cannot be in threaded connection, and the assembly cannot be damaged. Oil shortage and damage of parts caused by pressure loss of engine oil due to wrong assembly can be effectively prevented, and products are easy to machine and low in requirement for deviation.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to a filter element and a filter with positioning features. Background Art

[0002] During the maintenance and replacement of the filter element, in order to avoid oil overflow and cause environmental pollution, an oil return channel is provided in the filter assembly, and an oil return plug and a guide (positioning piece) are provided on the filter element. When the filter element is correctly installed, the guide (positioning piece) makes the oil return plug of the filter element close the oil return channel to ensure normal system oil pressure. During the removal of the filter element, the oil return channel needs to be opened to discharge the oil in the filter assembly.

[0003] Generally, during the installation of the filter, the operator must accurately adjust the rotational position between the guide and the oil return plug when installing the annular filter element into the filter housing, which is prone to errors based on experience. In addition, in actual applications, due to the different structures of the filter element and the matching filter assembly, it is necessary to strictly control the position between these parts during rotation to complete the assembly of the filter element and ensure that its position does not shift. Therefore, the processing process of the filter element becomes complicated and difficult to control, and it is easy to have processing position deviations that lead to product scrapping, and the cost of the product is also high. Utility Model Content

[0004] The main purpose of the utility model is to provide a filter element and a filter with positioning features, aiming to solve the technical problems that the filter element with a guide piece is difficult to operate during use and has complicated processing.

[0005] To achieve the above purpose, the filter element with positioning features proposed by the utility model includes:

[0006] an annular filter medium having a central cavity defined about a central axis thereof;

[0007] A first end cap and a second end cap connected to both ends of the annular filter medium;

[0008] The end face of the first end cover is eccentrically provided with an oil return plug, and has a positioning contour extending outwards, which is used to match the internal components of the filter assembly so that when the filter element is installed in the filter assembly, the oil return plug enters and closes the oil return channel.

[0009] Optionally, the positioning contour is a wall extending axially outward from an end surface of the first end cover.

[0010] Optionally, the wall includes at least one bent section to facilitate positioning within the filter assembly.

[0011] Optionally, a bent section of one of the walls is provided with a snap-in notch extending in the axial direction for positioning and cooperating with a snap-in block in the filter assembly.

[0012] Optionally, the wall is annular, and the inner periphery of the annular wall and the outer periphery of the internal component of the filter assembly are positioned and matched.

[0013] Optionally, the oil return plug is located outside the annular wall.

[0014] Optionally, an opening leading into the central cavity is provided at the center of the first end cover, and the positioning contour is arranged around the opening.

[0015] Optionally, a ring is formed extending outwardly along the opening, and a reinforcing rib is connected between the positioning contour and the ring.

[0016] The utility model also proposes a filter, which comprises:

[0017] The above-mentioned filter element with positioning features;

[0018] A filter assembly is provided with a matching contour that matches the positioning contour.

[0019] Optionally, the filter assembly is provided with a central tube connected to the central cavity, and the coordination profile is formed on the central tube.

[0020] In the technical solution of the utility model, by setting a positioning contour extending outward on the first end cap connected to one end of the annular filter medium, the operator can visually align and then use the positioning contour for guidance until the filter element is positioned in the filter assembly, and the oil return plug on the first end cap also closes the oil return channel in the housing. The above solution can avoid the use of a rotation method to adjust the position of the oil return plug, and the filter element can be installed without much operating experience, and the product processing is simple and has low deviation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional structural diagram of an embodiment of a filter element with positioning features provided by the utility model;

[0023] Figure 2 yes Figure 1 Side view of

[0024] Figure 3 This is an exploded view of an embodiment of a filter provided by the utility model;

[0025] Figure 4 yes Figure 3 The three-dimensional structure diagram of the filter assembly;

[0026] Figure 5 yes Figure 4 Top view of the center filter assembly.

[0027] Explanation of reference numerals: filter element 100, annular filter medium 1, assembly line 1a, central cavity 11, first end cover 2, opening 2a, oil return plug 21, positioning profile 22, bending section 22a, ring 23, reinforcing rib 24, second end cover 3, filter 1000, filter assembly 200, oil return channel 200a, clean oil channel 200b, internal thread 200c, center tube 201, matching profile 201a, screw hole 201b, screw cap 300, external thread 300a.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the invention of the present application, any of the currently described embodiments or preferred methods.

[0031] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate that the device referred to must have a specific direction or operate in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] Generally, during the installation of the filter, the operator must accurately adjust the rotational position between the guide and the oil return plug when installing the annular filter element into the filter housing, which is prone to errors based on experience. In addition, in actual applications, due to the different structures of the filter element and the matching filter assembly, it is necessary to strictly control the position between these parts during rotation to complete the assembly of the filter element and ensure that its position does not shift. Therefore, the processing process of the filter element becomes complicated and difficult to control, and it is easy to have processing position deviations that lead to product scrapping, and the cost of the product is also high.

[0034] In view of this, the utility model provides a filter element with positioning features. Figure 1 and Figure 2 This is an embodiment of a filter element with positioning features provided by the utility model. Figure 1 and Figure 2 The filter element 100 with positioning features includes an annular filter medium 1 and a first end cap 2 and a second end cap 3 connected to both ends of the annular filter medium 1 .

[0035] Specifically, the annular filter medium 1 has a central cavity 11 set around its central axis, and the outer side of the annular filter medium 1 constitutes a clean side and a non-clean side respectively; wherein, an oil return plug 21 is eccentrically provided on the end face of the first end cover 2, and the end face of the first end cover 2 also has a positioning profile 22 extending outward, and the positioning profile 22 and the internal component of the filter assembly 200 (i.e., the matching profile 201a) are matched, and after visual alignment along the axial direction, the filter element 100 is positioned or directly plugged into the filter assembly 200, and the oil return plug 21 enters and closes the oil return channel 200a in the filter assembly 200. It should be noted that the oil return plug 21 is composed of a pin and a sealing ring.

[0036] In the technical solution of the present utility model, by setting a positioning profile 22 extending outward on the first end cap 2 connected to one end of the annular filter medium 1, the operator can visually align and then use the positioning profile 22 for guidance until the filter element 100 is positioned in the filter assembly 200, and the return oil plug 21 on the first end cap 2 also closes the return oil channel 200a in the housing 200. The above solution can avoid the use of a rotation method to adjust the position of the return oil plug 21. At the same time, if the filter element is not correctly positioned, the rotary cover 300 and the filter assembly 200 cannot be threadedly connected, which can effectively prevent the loss of oil pressure and the damage of the machine parts due to lack of oil caused by incorrect assembly. The filter element 100 can be installed without much operating experience, and the product processing is simple and the deviation requirement is low.

[0037] To facilitate the positioning and matching of the positioning contour 22 and the matching contour 201a, please refer to Figure 1 and Figure 2 In one embodiment of the present invention, the positioning profile 22 is a wall extending axially outward from the end surface of the first end cover 2. Correspondingly, the matching profile 201a in the filter assembly 200 can also be an axially extending wall, or a structure such as a bump or boss. It should be noted that the positioning profile 22 and the matching profile 201a are not mutually engaged, but only play a guiding role during the axial installation process of the filter element 100.

[0038] Based on the axially matched positioning profile 22 and matching profile 201a, the pin of the oil return plug 21 also extends axially on the end surface of the first end cover 2 so that it can be inserted into the oil return channel 200a along the axial direction. Of course, it should be understood that the extension direction of the pin of the oil return plug 21 is consistent with the positioning profile 22, and can be other directions except the axial direction.

[0039] For further information, see Figure 1 In one embodiment of the present invention, the wall forming the positioning profile 22 includes four bent sections 22a, so that the end surface of the wall is approximately in a diamond shape. When the filter element 100 is positioned and installed in the filter assembly 200, the operator can align the matching profile 201a of the filter assembly 200 with the bent sections 22a of the wall. Of course, the embodiments of the present invention are not limited thereto, and the bent sections 22a of the wall can also be set to other numbers, and the end surface of the wall can be made into an elliptical structure.

[0040] Since the end surface of the wall is a symmetrical rhombus, in order to prevent the inlet of the oil return channel 200a from being missed during alignment, resulting in reverse installation. Figure 1 and Figure 2In one embodiment of the utility model, one of the bending sections 22a of the wall is provided with a bayonet for positioning with a block in the filter assembly 200. It should be understood that the four bending sections 22a are symmetrically arranged in pairs, wherein the end surfaces of two symmetrical bending sections 22a are lower than the other two, and the bayonet is provided in one of the two bending sections 22a with lower end surfaces, so that during the process of positioning the filter element 100 in the filter assembly 200, the bayonet can first contact the block and perform positioning. In addition, it should be noted that the bayonet and the block both extend axially and are not mutually engaged, and only play a certain guiding role during the axial installation of the filter element 100.

[0041] Of course, the implementation of the present invention is not limited thereto. In another embodiment, a block may be provided on the bending section 22 a , and a bayonet may be provided on the internal component of the filter assembly 200 .

[0042] See also Figure 1 In one embodiment of the utility model, the wall is annular, and the inner periphery of the annular wall and the outer periphery of the matching profile 201a realize axial guidance so that the filter element 100 is positioned in the filter assembly 200.

[0043] Of course, the implementation of the present invention is not limited to this. In another embodiment, the outer periphery of the annular wall and the inner periphery of the matching contour realize axial guidance, which depends on the internal structure of the filter assembly 200.

[0044] Furthermore, when the filter element 100 is installed in the axial direction, the oil return plug 21 and the matching profile 201a are not prevented from interfering with each other. Figure 1 In one embodiment of the present invention, the oil return plug 21 is located outside the annular wall. If the outer periphery of the annular wall and the inner periphery of the matching profile 201a are guided and matched, the oil return plug 21 is located inside the annular wall.

[0045] To position the filter element, refer to Figure 1 In one embodiment of the utility model, an opening 2a is provided at the center of the first end cover 2 to enter the central cavity 11, and the opening is sealed and connected to the central tube 201 in the filter assembly 200 to facilitate the pumping out of the filtered clean oil. Based on the design of the opening, the positioning contour 22 is arranged around the opening 2a, preferably symmetrically around the opening 2a.

[0046] Among them, a sealing ring is arranged in the opening 2a. When the filter element is positioned and installed under the cooperation of the positioning contour 22 and the matching contour 201a, the connection between the central tube 201 and the sealing ring of the opening 2a gradually becomes tight. Figure 2To indicate that the installation is complete, a circle of assembly line 1a is provided on the outer circumference of the annular filter medium 1. When the assembly line 1a is flush with the port of the filter assembly 200, it indicates that the installation is in place and the operator can stop the installation.

[0047] To increase the strength of the wall forming the positioning profile 22, see Figure 1 In one embodiment of the utility model, a ring 12 is formed extending outward from the opening, and a reinforcing rib 24 is connected between the outer periphery of the positioning profile 22 and the inner periphery of the ring 23, thereby enhancing the stability of the positioning profile 22. Of course, the strength of the oil return plug 21 can also be improved, and the support of the oil return plug 21 and the positioning profile 22 are integrally formed, which also enhances the stability of the oil return plug 21.

[0048] The utility model also proposes a filter, which is mainly used for oil filtering. Figure 3-5 This is an embodiment of the filter provided by the utility model. Figure 3-5 The filter 1000 includes the above-mentioned filter element 100 with positioning features, and a filter assembly 200. The filter assembly 200 is provided with a matching contour 201a that matches the positioning contour 22, and an oil return channel 200a connected to the oil tank.

[0049] See also Figure 3 In one embodiment of the utility model, the filter assembly 200 is provided with a central tube 201 having one end connected to the central cavity 11, the coordination profile 201a is formed at the bottom of the central tube 201, and the coordination profile 201a is provided with a screw hole 201b, and the central tube 201 is fixedly installed in the filter assembly 200 by screws. The other end of the central tube is connected to the clean oil channel 200b to pump the filtered oil.

[0050] Of course, the filter 1000 also includes a screw cap 300 for closing the filter assembly 200. The filter assembly 200 and the screw cap 300 are respectively provided with an internal thread 200c and an external thread 300a for threaded connection. During the installation of the filter element 100, the screw cap 300 and the filter assembly 200 can be completely threadedly connected only when the assembly line 1a of the annular filter medium 1 and the port of the filter assembly 200 are flush. This design can prevent incorrect assembly and prevent the oil pressure loss and oil shortage damage caused by the oil return plug 21 not closing the oil return channel 200a.

[0051] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A filter element with positioning features, characterized in that: include: An annular filter medium (1), the annular filter medium (1) having a central cavity (11) set around its central axis; A first end cap (2) and a second end cap (3) connected to both ends of the annular filter medium (1); The end surface of the first end cover (2) is eccentrically provided with an oil return plug (21) and has a positioning profile (22) extending outwards, which is used to match the internal components of the filter assembly (200), so that when the filter element is installed in the filter assembly (200), the oil return plug (21) enters and closes the oil return channel (200a).

2. The filter element with positioning features according to claim 1, characterized in that: The positioning profile (22) is a wall extending axially outward from the end surface of the first end cover (2).

3. The filter element with positioning features as claimed in claim 2, characterized in that: The wall includes at least one bent section (22a) to position it within the filter assembly (200).

4. The filter element with positioning features according to claim 3, characterized in that: One of the bent sections (22a) of the wall is provided with a bayonet (22b) extending in the axial direction, and is used for positioning and matching with a bayonet block (201b) in the filter assembly.

5. The filter element with positioning features according to claim 2, characterized in that: The wall is annular in shape, and the inner periphery of the annular wall is positioned and matched with the outer periphery of the internal component of the filter assembly (200).

6. The filter element with positioning features according to claim 5, characterized in that: The oil return plug (21) is located outside the annular wall.

7. The filter element with positioning features according to claim 1, characterized in that: An opening (2a) entering the central cavity (11) is provided at the center of the first end cover (2), and the positioning contour (22) is arranged around the opening (2a).

8. The filter element with positioning features according to claim 7, characterized in that: A ring (23) is formed by extending outwardly along the opening (2a), and a reinforcing rib (24) is connected between the positioning contour (22) and the ring (23).

9. A filter, characterized in that: include: A filter element with positioning features as claimed in any one of claims 1 to 8; A filter assembly (200) is provided with an oil return channel (200a) and a matching contour (201a) matched with the positioning contour (22).

10. The filter according to claim 9, characterized in that The filter assembly (200) is provided with a central tube (201) connected to the central cavity (11), and the coordination profile (201a) is formed on the central tube (201).

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