Connecting piece, filter element assembly and filter

Abstract

The utility model discloses a connecting piece, a filter element assembly and a filter, the connecting piece comprises a hollow support and an end disc connected with one end of the support, and the support is arranged on the periphery of a filter element in a surrounding mode and used for limiting the filter element in the radial direction; an oil return plug is eccentrically arranged on the outer end face of the end disc and used for sealing an oil return channel in the filter assembly. According to the technical scheme, when the filter element is assembled, an operator can firstly install the connecting piece with the oil return plug into the filter assembly, meanwhile, the oil return plug on the end disc also enters and seals the oil return channel in the assembly, then the filter element is installed in the screw cap or placed into the connecting piece, and finally the screw cap is screwed on the assembly. When the filter element is disassembled, after the screw cap is unscrewed, the screw cap takes out the filter element, and meanwhile, the filter element is taken out of the connecting piece. According to the scheme, the situation that the position of the oil return plug is adjusted in a rotating mode can be avoided, the filter element assembly can be installed without too much operation experience, product machining is easy, and the requirement for deviation is low.

Description

Technical Field

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

[0002] During the maintenance and replacement of the filter element assembly, 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 assembly. When the filter element assembly is correctly installed, the guide (positioning piece) makes the oil return plug of the filter element assembly close the oil return channel to ensure normal system oil pressure. During the disassembly of the filter element assembly, 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 assembly 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 assembly and the matched filter assembly, it is necessary to strictly control the position between these parts during rotation to complete the assembly of the filter element assembly and ensure that its position does not shift. Therefore, the processing process of the filter element assembly 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 connector, a filter element assembly and a filter, aiming to solve the technical problems that a filter element with a guide piece is difficult to operate during use and has complicated processing.

[0005] To achieve the above-mentioned purpose, the connecting piece proposed by the utility model includes:

[0006] A hollow bracket is arranged around the outer periphery of the filter element and is used to radially limit the filter element;

[0007] An end plate connected to one end of the bracket has an outer end surface of the end plate eccentrically provided with an oil return plug for closing the oil return channel in the filter assembly.

[0008] Optionally, the bracket is provided with a connecting portion for connecting the filter element, so that during the process of removing the filter element, the connecting portion is removed together with the filter element, the oil return plug is removed and the oil return channel is opened.

[0009] Optionally, there are multiple connecting parts, and they are evenly arranged along the circumferential direction.

[0010] Optionally, the end plate is hollow.

[0011] Optionally, the bracket and the end plate are integrally injection molded.

[0012] The utility model also provides a filter element assembly, which includes a filter element and the above-mentioned connecting piece;

[0013] The filter element comprises:

[0014] an annular filter medium having a central cavity defined about a central axis thereof;

[0015] A first end cap and a second end cap connected to both ends of the annular filter medium;

[0016] Wherein, the support surrounds the outer circumference of the annular filter medium.

[0017] Optionally, one of the first end cover and the second end cover is connected to the bracket.

[0018] Optionally, the first end cover is arranged close to the end plate, and the first end cover and the end plate are respectively provided with a first opening and a second opening entering the central cavity.

[0019] The utility model also proposes a filter, which is characterized by comprising:

[0020] The filter element assembly described above;

[0021] A filter assembly is provided with an oil return passage.

[0022] Optionally, the filter assembly is provided with a central tube connected to the central cavity.

[0023] Optionally, when the oil return plug closes the oil return passage in the filter assembly, the other end of the bracket is flush with the open end of the filter assembly so that the rotary cover and the filter assembly are threadedly connected.

[0024] Optionally, when the oil return plug does not close the oil return passage in the filter assembly, the rotary cover and the filter assembly cannot be threadedly connected.

[0025] In the technical solution of the utility model, when assembling the filter element, the operator can first install the connector with the oil return plug into the interior of the filter assembly, and at the same time, the oil return plug on the end plate also enters and closes the oil return channel in the assembly, and then installs the filter element into the screw cap or puts it into the connector, and finally tightens the screw cap onto the assembly. When removing the filter element, after unscrewing the screw cap, the screw cap will bring out the filter element, and the filter element will bring out the connector. The above solution can avoid the use of rotation to adjust the position of the oil return plug, and the filter element assembly can be installed without much operating experience, and the product processing is simple and has low deviation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 This is a three-dimensional structural diagram of an embodiment of a connecting piece provided by the utility model;

[0028] Figure 2 yes Figure 1 Bottom view of

[0029] Figure 3 This is a three-dimensional structural diagram of an embodiment of a filter element assembly provided by the utility model;

[0030] Figure 4 This is an exploded view of an embodiment of a filter provided by the utility model;

[0031] Figure 5 yes Figure 4 A top view of the middle filter assembly;

[0032] Figure 6 It is a cross-sectional view of an embodiment of a filter provided by the utility model.

[0033] Explanation of reference numerals: connector 100, bracket 1, connecting portion 1a, end plate 2, second opening 2a, oil return plug 21, filter element 200, annular filter medium 201, central cavity 201a, first end cover 202, first opening 202a, second end cover 203, snap-on portion 203a, filter assembly 300, oil return channel 300a, oil inlet channel 300b, oil outlet channel 300c, central tube 301, screw cap 400, fitting portion 400a, filter 1000.

[0034] 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

[0035] 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.

[0036] 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 utility model creation of the present application, any of the currently described embodiments or preferred methods.

[0037] 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. Therefore, they cannot be understood as limitations on the present invention.

[0038] 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.

[0039] 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 assembly 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 assembly and the matched filter assembly, it is necessary to strictly control the position between these parts during rotation to complete the assembly of the filter element assembly and ensure that its position does not shift. Therefore, the processing process of the filter element assembly 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.

[0040] In view of this, the utility model provides a connecting piece, which is mainly used for installation in a fuel filter or an oil filter. Figure 1 and Figure 2 This is an embodiment of the connector provided by the utility model. Figure 1 and Figure 2 The connecting member 100 includes a hollow bracket 1 and an end plate 2 connected to one end of the bracket 1 .

[0041] Specifically, the bracket 1 is an annular structure extending in the axial direction, and the annular structure is hollowed out to form a plurality of holes for passing oil. The filter element 200 is detachably mounted on the inner side of the annular bracket 1, or sleeved on the outer side of the annular bracket 1, thereby limiting the movement of the filter element 200 in the radial direction; one end of the bracket 1 extending in the axial direction is connected to the end plate 2, and an oil return plug 21 is eccentrically provided on the outer end surface of the end plate 2. Of course, the shape of the bracket 1 can also be set to other shapes, such as being composed of a plurality of support rods extending in the axial direction, and the filter element 200 is detachably mounted on the inner side or outer side of each support rod. It should be understood that the oil return plug 21 includes a pin and a sealing ring sleeved on the pin (not shown in the figure).

[0042] In the technical solution of the utility model, when assembling the filter element, the operator can first install the connector 100 with the oil return plug 21 into the interior of the filter assembly 300, and at the same time, the oil return plug 21 on the end plate 2 also enters and closes the oil return channel 300a in the assembly, and then installs the filter element 200 into the screw cap 400 or puts it into the connector 100, and finally tightens the screw cap 400 onto the assembly 300. When disassembling the filter element 200, after unscrewing the screw cap 400, the screw cap 400 will bring out the filter element 200, and the filter element 200 will bring out the connector 100. The above solution can avoid the use of rotation to adjust the position of the oil return plug, and the filter element can be installed without much operating experience. It also avoids the high cost of installation damage caused by the oil return plug being installed on the filter element, and the product processing is simple and the deviation requirement is low.

[0043] In order to enable the support 1 to axially limit the filter element 200, the support 1 is provided with a connecting portion 1a, see Figure 1 and Figure 3 In one embodiment of the utility model, the connecting portion 1a is a plurality of buckles provided on the bracket 1, each buckle extending in the axial direction; the buckles are elastically deformed radially outward by the extrusion of the filter element 200, and finally are mutually engaged with the end cover of the filter element 200, so that the bracket 1 and the filter element 200 are connected and the axial movement of the filter element 200 is limited, but the filter element 200 can still rotate relative to the bracket 1. Thus, in the process of the filter element 200 being removed from the filter assembly 300, the connecting member 100 can be removed together with the filter element 200, so that the oil return plug 21 is removed and the oil return channel 300a is opened, and the oil in the assembly returns to the oil tank. Of course, the implementation of the utility model is not limited to this, and the connecting portion 1a can also be a bump or other structure that can limit the axial movement of the filter element 200, and the connection method between the connecting portion 1a and the filter element 200 can also be interference fit, elastic connection, etc., which will not be described in detail here.

[0044] Furthermore, in one embodiment of the present invention, the number of the connecting parts 1a is 4, that is, 3 buckles are evenly distributed along the circumference. Of course, in other embodiments of the present invention, the number of the connecting parts 1a may also be other, preferably 3 or more.

[0045] See also Figure 1 and Figure 2 Since each buckle is arranged near the end plate 2, after the filter element 200 is installed, its end cover and the end plate 2 of the connecting piece 100 are in close contact with each other. In order to prevent the two from being in close contact and generating adsorption force, in one embodiment of the utility model, the end plate 2 is hollowed out, so that the oil in the gap between the end cover of the filter element 200 and the end plate 2 can leak out, which can reduce the adsorption force between the end cover of the filter element 200 and the end plate 2 of the connecting piece 100, so that the filter element 200 can be easily detached from the connecting piece 100.

[0046] In order to improve the strength of the connector 100, in one embodiment of the present invention, the bracket 1 and the end plate 2 are integrally injection molded. The end of the annular bracket 1 is connected to the outer periphery of the end plate 2, and the oil return plug 21 is molded on the other end surface of the end plate 2 relative to the bracket 1. Of course, the connector 100 can also be made of other materials, such as metal.

[0047] The utility model also proposes a filter element assembly. Figure 3 This is an embodiment of the filter element assembly provided by the utility model. Figure 3 The filter element assembly includes a filter element 200 and the above-mentioned connecting member 100.

[0048] Specifically, the filter element 200 includes an annular filter medium 201 and a first end cap 202 and a second end cap 203 connected to both ends of the annular filter medium 201. The annular filter medium 201 has a central cavity 201a set around its central axis, which and the outer side of the annular filter medium 201 respectively constitute a clean side and a non-clean side. Among them, the annular bracket 1 of the connector 100 surrounds the outer periphery of the annular filter medium 201 to limit the movement of the filter element 200 in the radial direction. In addition, the bracket 1 can be connected to the outer periphery of the annular filter medium 201, or it can be unconnected. In this embodiment, the bracket 1 is only connected to the first end cap 202 of the filter element 200. Of course, in other embodiments, the bracket 1 can also be connected to the second end cap 203 of the filter element 200.

[0049] In order to allow the oil to be pumped into the central cavity 201a or pumped out of the central cavity 201a, in one embodiment of the utility model, the first end cover 202 and the end plate 2 are in contact with each other, and the first end cover 202 and the end plate 2 are respectively provided with a first opening 202a and a second opening 2a for entering the central cavity 201a. The first opening 202a and / or the second opening 2a are used to be sealed and connected with the central tube 301 in the filter assembly 300, so that the oil containing particulate matter can be pumped in or the clean oil can be pumped out.

[0050] Among them, a sealing ring is provided on the inner wall of the first opening 202a. When the filter element 200 is installed, the contact between the outer periphery of the central tube 301 in the filter assembly 300 and the sealing ring in the first opening 202a gradually becomes tight, thereby sealing the first opening 202a of the central cavity 201a.

[0051] The utility model also proposes a filter, which is mainly used for filtering engine oil or fuel. Figure 4-6 This is an embodiment of the filter provided by the utility model. Figure 4-6 The filter 1000 includes the above-mentioned filter element assembly and a filter assembly 300. The filter assembly 300 is provided with an oil return passage 300a connected to the oil tank and an oil inlet passage 300b for the oil containing particulate matter.

[0052] See also Figure 5 and Figure 6 In one embodiment of the present invention, the filter assembly 300 is provided with a central tube 301 having one end connected to the central cavity 201a. In addition, a clean oil channel 300c is provided at the bottom of the filter assembly 300, and the other end of the central tube 301 is connected to the clean oil channel 300c to pump the filtered oil.

[0053] Of course, the filter also includes a screw cap 400 for closing the filter assembly 300, and the filter assembly 300 and the screw cap 400 are detachably connected via threads.

[0054] As a preferred embodiment, to achieve the correct installation of the connector 100 or the filter element assembly, please refer to Figure 6 When the oil return plug 21 completely enters and closes the oil return channel 300a in the filter assembly 300, the other end of the bracket 1 is flush with the open end of the filter assembly 300, to prompt the operator that the connector 100 or the filter element assembly has been installed, so that the screw cap 400 can be screwed in and fully threadedly connected with the filter assembly 300.

[0055] Furthermore, when installing the rotary cover 400, a matching portion 400a is provided on the inner periphery of the rotary cover 400, and a clamping portion 203a is provided on the second end cover 203 of the filter element 200, and the two can be clamped with each other. In this embodiment, the matching portion 400a is an annular bayonet, and the clamping portion 203a is a circumferentially arranged buckle, so that after the rotary cover 400 is connected to the filter element 200, the two can rotate relative to each other. Therefore, the operator can choose the following multiple ways to install the filter element 200.

[0056] 1. Connect the filter element 200 and the connector 100 and install them as a component in the filter assembly 300. After the end of the bracket 1 is flush with the open end of the filter assembly 300, press the screw cap 400 down and connect it to the filter element 200. Finally, rotate the screw cap 400 to achieve a complete threaded connection with the filter assembly 300.

[0057] 2. Install the connecting piece 100 separately in the filter assembly 300. After the end of the bracket 1 is flush with the open end of the filter assembly 300, connect the screw cap 400 and the filter element 200. Then press them down together to connect the first end cover 202 of the filter element 200 and the connecting piece 100. Finally, rotate the screw cap 400 to achieve a complete threaded connection with the filter assembly 300.

[0058] 3. Install the connector 100, the filter element 200 and the screw cap 400 to the filter assembly 300 in sequence.

[0059] Fourth, the connecting piece 100, the filter element 200 and the screw cap 400 are connected in sequence and then installed together to the filter assembly 300.

[0060] On the other hand, when the filter element 200 is disassembled, after the rotary cap 400 is twisted open, the rotary cap 400 brings out the filter element 200, and the filter element 200 brings out the connector 100, and the disassembly is completed.

[0061] It should be noted that when the oil return plug 21 does not close the oil return passage 300a in the filter assembly 300, the screw cap 400 and the filter assembly 300 cannot be threadedly connected. That is, when the oil return plug 21 does not enter the oil return passage 300a, the external thread of the screw cap 400 and the internal thread of the filter assembly 300 cannot be connected to prevent incorrect installation. It should be understood that the length of the oil return plug 21 should correspond to the thread length of the screw cap 400. When the connector 100 is not installed normally, the bracket 1 will be significantly higher than the open end face of the filter assembly 300, which will be discovered by the operator, thereby further preventing incorrect installation.

[0062] 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.

[0063] 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 connector, characterized in that: include: A hollow support (1) is disposed around the outer circumference of the filter element (200) and is used to radially limit the filter element (200); An end plate (2) connected to one end of the bracket (1), wherein an outer end surface of the end plate (2) is eccentrically provided with an oil return plug (21) for closing an oil return passage (300a) in the filter assembly.

2. The connector according to claim 1, characterized in that The bracket (1) is provided with a connecting portion (1a) for connecting to the filter element (200), so that during the process of removing the filter element (200), the connecting portion (1a) is removed together with the filter element (200), the oil return plug (21) is removed and the oil return channel (300a) is opened.

3. The connector according to claim 2, characterized in that The connecting parts (1a) are multiple and are evenly arranged along the circumferential direction.

4. The connector according to claim 1, characterized in that The end plate (2) is hollow.

5. The connector according to claim 1, characterized in that: The bracket (1) and the end plate (2) are integrally injection molded.

6. A filter element assembly, characterized in that: The filter element assembly comprises a filter element (200) and a connecting piece according to any one of claims 1 to 5; The filter element comprises: An annular filter medium (201), the annular filter medium (201) having a central cavity (201a) set around its central axis; A first end cap (202) and a second end cap (203) connected to both ends of the annular filter medium (201); Wherein, the support (1) surrounds the outer circumference of the annular filter medium (201).

7. The filter element assembly according to claim 6, characterized in that: One of the first end cover (202) and the second end cover (203) is connected to the bracket (1).

8. The filter element assembly according to claim 6, characterized in that: The first end cover (202) is arranged close to the end plate (2), and the first end cover (202) and the end plate (2) are respectively provided with a first opening (202a) and a second opening (2a) for entering the central cavity (201a).

9. A filter, characterized in that: include: The filter element assembly according to any one of claims 6 to 8; A filter assembly (300), wherein the filter assembly is provided with an oil return passage (300a); The screw cap (400) is threadedly connected to the open end of the filter assembly (300) to seal it.

10. The filter according to claim 9, characterized in that The filter assembly (300) is provided with a central tube (301) connected to the central cavity (201a).

11. The filter according to claim 9, characterized in that When the oil return plug (21) closes the oil return passage (300a) in the filter assembly, the other end of the bracket (1) is flush with the open end of the filter assembly, so that the rotary cover (400) and the filter assembly (300) are threadedly connected.

12. The filter according to claim 9, characterized in that When the oil return plug (21) does not seal the oil return passage (300a) in the filter assembly, the rotary cover (400) and the filter assembly (300) cannot be threadedly connected.

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