Filter

Abstract

The utility model relates to a filter. The filter comprises a shell and a threaded cover plate, an opening is formed in one end of the shell, the shell is provided with a hemming part, the hemming part is arranged around the opening of the shell, the threaded cover plate is arranged at the opening of the shell, the hemming part wraps the edge of the threaded cover plate, and the threaded cover plate and the shell jointly define the inner space of the filter. The threaded cover plate is provided with a friction piece which abuts against the hemming part. According to the filter, the friction piece is additionally arranged, the hemming part of the shell abuts against the friction piece, the friction force generated when the threaded cover plate and the shell rotate relatively is increased, then the tightening torque generated when the threaded cover plate is installed on the shell is increased, slipping is prevented, the installation stability of the threaded cover plate can be improved, and the service life of the threaded cover plate is prolonged. And the dismounting difficulty of the threaded cover plate can also be reduced.

Description

Technical Field

[0001] This application relates to the field of filter technology, and in particular to a filter. Background Technology

[0002] Filters are essential components in automotive and other mechanical equipment, and can be broadly categorized into oil filters and fuel filters. Taking oil filters as an example, they typically consist of a housing and a threaded cover, with the cover mounted on the housing. The threaded cover has threaded holes, allowing maintenance personnel to easily screw it onto or remove it from the housing using tools, making filter replacement more efficient. Furthermore, the threaded cover can connect to the engine's oil filter housing, ensuring a secure installation and allowing the filter to withstand vibrations generated by engine operation during vehicle operation.

[0003] However, when installing or removing the threaded cover from the housing, the threaded cover often slips easily between itself and the housing due to insufficient friction. This affects the filter's sealing performance and reduces the efficiency of filter maintenance or filter element replacement. Utility Model Content

[0004] Therefore, it is necessary to provide a filter to address the problem of insufficient tightening torque between the threaded cover and the housing.

[0005] A filter includes a housing and a threaded cover. One end of the housing has an opening, and the housing has a rolled edge surrounding the opening. The threaded cover is disposed at the opening of the housing, and the rolled edge wraps around the edge of the threaded cover. The threaded cover and the housing together define the internal space of the filter. The threaded cover has a friction element that abuts against the rolled edge.

[0006] In one embodiment, the threaded cover plate is provided with a groove, the friction element is disposed in the groove, and at least a portion of the rolled edge is located in the groove and abuts against the friction element.

[0007] In one embodiment, the groove is a square groove, which has side walls and a bottom wall.

[0008] In one embodiment, the friction element is connected to the sidewall and the bottom wall of the square groove.

[0009] In one embodiment, the friction element is connected only to the bottom wall of the square groove.

[0010] In one embodiment, the housing has an inner wall opposite to the threaded cover plate, the square groove is an annular groove, and the sidewalls of the square groove include a first sidewall and a second sidewall, the first sidewall being located between the second sidewall and the inner wall, and the height of the first sidewall being less than the height of the second sidewall.

[0011] In one embodiment, the groove is an arc-shaped groove.

[0012] In one embodiment, the friction element is in the shape of a rectangular block.

[0013] In one embodiment, the friction element has an arc-shaped edge that abuts against the rolled edge.

[0014] In one embodiment, the number of friction elements is multiple, and the multiple friction elements are spaced apart.

[0015] The filter is equipped with a friction element, which abuts the rolled edge of the housing against the friction element, increasing the friction between the threaded cover and the housing when they rotate relative to each other. This increases the tightening torque when the threaded cover is installed on the housing, preventing slippage. This not only improves the installation stability of the threaded cover but also reduces the difficulty of disassembling it. Attached Figure Description

[0016] Figure 1 This is an exploded view of a filter according to an embodiment of this application.

[0017] Figure 2 For the filter in one embodiment of this application Figure 1 A cross-sectional view along the α plane.

[0018] Figure 3 The housing of the filter in one embodiment of this application is along Figure 1 A cross-sectional view along the α plane.

[0019] Figure 4 for Figure 2 Enlarged diagram of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the threaded cover plate of a filter in another embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1. Outer shell; 11. Accommodating space; 12. Inner wall; 2. Threaded cover plate; 21. Threaded hole; 22. Protrusion; 23. Groove; 231. First side wall; 232. Second side wall; 233. Bottom wall; 24. Protruding ridge; 3. Rolled edge; 31. Extension end; 32. First segment; 33. Second segment; 34. Third segment; 4. Friction element; 41. First edge; 411. First end; 412. Second end; 42. Second edge; 421. Third end; 422. Fourth end; 43. Third edge; 44. Fourth edge; 5. Filter element; 51. Inner hole. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] See Figure 1 , Figure 2 and Figure 3 An embodiment of this application provides a filter including a housing 1, a threaded cover plate 2, and a rolled edge portion 3. One end of the housing 1 has an opening, and the housing 1 is provided with a rolled edge portion 3, which surrounds the opening of the housing 1. The threaded cover plate 2 is disposed at the opening of the housing 1, and the rolled edge portion 3 wraps around the edge of the threaded cover plate 2. The threaded cover plate 2 and the housing 1 together define the internal space of the filter. The threaded cover plate 2 is provided with a friction element 4, which abuts against the rolled edge portion 3.

[0028] When the threaded cover 2 is installed on the housing 1, the rolled edge 3 abuts against the friction element 4, which increases the friction between the threaded cover 2 and the housing 1 when they rotate relative to each other. This increases the tightening torque when the threaded cover 2 is installed on the housing 1, preventing slippage. This not only improves the installation stability of the threaded cover 2, but also reduces the difficulty of disassembling the threaded cover 2.

[0029] Continue to refer to Figures 1 to 3 ,by Figures 1 to 3 Taking the filter shown as an example, the outer shell 1 is approximately a cylindrical structure with one end closed. The inner side of the outer shell 1 is provided with an annular inner wall 12, which is opposite to the threaded cover plate 2. The closed end of the outer shell 1 is the bottom, and the open end of the outer shell 1 is the top. The top of the outer shell 1 has an opening (not marked in the figure), which is used to insert or remove the filter element 5 and install components such as the threaded cover plate 2.

[0030] In this embodiment, the threaded cover 2 is a rotating body, and the threaded cover 2, the outer shell 1, and the filter element 5 are all coaxially arranged. The threaded cover 2 and the outer shell 1 together define the internal space of the filter, that is, the accommodating space 11. For ease of understanding, in Figure 3 The area of ​​the accommodating space 11 is indicated by a dashed line. In other embodiments, when the thickness of the threaded cover plate 2 is thinner or thicker than that in this embodiment, the volume of the accommodating space 11 may not be limited to this, that is, the position of the dashed line can be appropriately moved up or down. A filter element 5 is disposed in the accommodating space 11. Optionally, the filter element 5 is coaxially disposed with the outer shell 1, so that the center of gravity of the entire filter is closer to the center, improving stability. The filter element 5 and the outer shell 1 share the axis X1-X1 as the central axis, and the filter element 5 is provided with an inner hole 51 along the length direction of the axis X1-X1.

[0031] The threaded cover plate 2 is provided with a threaded hole 21, which is arranged along the direction of the axis X1-X1, that is, the threaded hole 21 penetrates the rotating body vertically. A protrusion 22 is provided on the bottom side of the threaded cover plate 2. The protrusion 22 is approximately in the shape of a flattened cylinder. In this embodiment, the protrusion 22 is coaxially arranged with both the outer shell 1 and the filter element 5. The diameter of the protrusion 22 is slightly smaller than the diameter of the inner hole 51. Therefore, the protrusion 22 can protrude into the inner hole 51 to facilitate the positioning and installation of the threaded cover plate 2. The internal thread of the threaded hole 21 facilitates the tightening or loosening of the threaded cover plate 2 using tools, thereby making it easier to install or remove the threaded cover plate 2.

[0032] In other embodiments, the threaded cover plate 2 may not be a rotating body, but a rotationally symmetric body or an asymmetric body, etc., and this application does not limit it in this regard.

[0033] In this embodiment, the threaded cover plate 2 is installed on the top of the housing 1 and located inside the housing 1. The threaded cover plate 2 being located inside the housing 1 can mean that the threaded cover plate 2 is completely inside the housing 1 and the periphery of the threaded cover plate 2 is opposite to the inner wall 12, or it can mean that a part of the threaded cover plate 2 is inside the housing 1 and the other part protrudes out of the housing 1 along the axis X1-X1.

[0034] Continue to refer to Figure 1 and Figure 3 For example, the rolled edge 3 is located at the top of the outer shell 1 and surrounds the opening of the outer shell 1. Since the opening of the outer shell 1 is circular, the rolled edge 3 is also annular. Specifically, in this embodiment, the rolled edge 3 is integrally formed with the outer shell 1, that is, the rolled edge 3 is formed by bending inward from the top edge of the outer shell 1. In some other embodiments, the rolled edge 3 and the outer shell 1 can also be connected by bonding, welding, etc., and this application does not limit this. The side of the rolled edge 3 near the axis X1-X1 is the extension end 31. It can be understood that the threaded cover plate is in Figure 2In the middle, the extension end 31 is located on the top side of the threaded cover plate 2 to wrap around the threaded cover plate 2. The rolled edge 3 wraps around the top edge of the threaded cover plate 2 to prevent the threaded cover plate 2 from detaching from the housing 1. Figure 3 As can be seen, in this embodiment, the end of the rolled edge portion 3 that is away from the extension end 31 is smoothly connected to the top of the outer shell 1, that is, the connection between the rolled edge portion 3 and the inner wall 12 is a smooth transition shape.

[0035] The rolled edge 3 can be made of elastic metal or plastic, so that it can undergo elastic deformation when the threaded cover 2 is installed, allowing the threaded cover 2 to be smoothly inserted into the inside of the housing 1.

[0036] The threaded cover plate 2 is provided with a friction element 4. For example, refer to... Figure 1 , Figure 2 and Figure 4 The friction element 4 is disposed on the top side of the threaded cover plate 2. When the threaded cover plate 2 is disposed on the top of the outer casing 1, the friction element 4 abuts against the rolled edge portion 3 to increase the frictional force between the threaded cover plate 2 and the outer casing 1 in the direction of relative rotation around the axis X1-X1. This reduces the probability of slippage during installation of the threaded cover plate 2 and optimizes the experience of installing and removing the threaded cover plate 2. On the other hand, since the friction element 4 abuts against the rolled edge portion 3, the friction element 4 increases the elastic deformation of the rolled edge portion 3, thereby increasing the downward pressure of the rolled edge portion 3 on the threaded cover plate 2 and improving the fixing effect of the threaded cover plate 2. In several embodiments of this paper, the friction element 4 is a protrusion structure.

[0037] In some embodiments, reference Figure 1 , Figure 4 as well as Figure 5 The threaded cover plate 2 is provided with a groove 23, and the friction element 4 is disposed within the groove 23. At least a portion of the rolled edge 3 is located within the groove 23 and abuts against the friction element 4. Exemplarily, the top side of the threaded cover plate 2 is provided with an annular groove 23. Preferably, the groove 23 is an annular groove with the axis X1-X1 as its central axis. The groove 23 is close to the outer peripheral edge of the threaded cover plate 2 in the radial direction. Due to the recessed groove 23, a ridge 24 is formed between the groove 23 and the outer peripheral edge of the threaded cover plate 2. Understandably, the ridge 24 is also annular. The friction element 4 is disposed within the groove 23, and the portion of the rolled edge 3 near the extension end 31 protrudes into the groove 23 in a direction close to the axis X1-X1 and abuts against the friction element 4. Understandably, the friction element 4 is provided in the groove 23, and the rolled edge 3 not only abuts against the friction element 4, but also abuts against the protruding edge 24 of the threaded cover plate 2, which increases the contact area between the outer shell 1 and the threaded cover plate 2, further optimizing the experience of installing and removing the threaded cover plate 2.

[0038] Furthermore, with Figure 4 For example, the rolled edge 3 includes a first segment 32, a second segment 33, and a third segment 34 connected in sequence. For ease of understanding, in Figure 2 The first segment 32, the second segment 33, and the third segment 34 are separated by dashed lines. In this embodiment, the first segment 32, the second segment 33, and the third segment 34 are integrally formed. In other embodiments, the three segments can also be fixedly connected by means of bonding, welding, etc. The first segment 32 is arc-shaped. When the threaded cover plate 2 is installed on the outer shell 1, the first segment 32 overlaps and abuts against the protruding ridge 24. The second segment 33 is inclined. Specifically, at least a portion of the side of the second segment 33 near the extension end 31 is located within the groove 23, such that the height of the side of the second segment 33 away from the extension end 31 is higher than the height of the side of the second segment 33 near the extension end 31. The third segment 34 is horizontally positioned and located within the groove 23. Of course, the third segment 34 can also be inclined at a certain angle to the horizontal direction; it does not necessarily have to be horizontal.

[0039] In some embodiments, the groove 23 is a square groove, and the friction member 4 is disposed within the square groove. For example, as... Figure 1 , Figure 4 , Figure 5 As shown, the groove 23 has two opposing sidewalls and a bottom wall 233. The sidewall furthest from the axis X1-X1 is defined as the first sidewall 231, and the sidewall closest to the axis X1-X1 is defined as the second sidewall 232. The first sidewall 231 is located between the second sidewall 232 and the inner wall 12. The bottom wall 233 connects the bottom sides of the first sidewall 231 and the second sidewall 232, and the bottom wall 233 is perpendicular to the first sidewall 231 and the second sidewall 232. Of course, the included angle between the bottom wall 233 and the first sidewall 231 and the second sidewall 232 can be slightly larger or slightly smaller than a right angle. The friction element 4 is disposed within the groove 23. That is, the friction element 4 can be disposed on the bottom wall 233 and connected only to the bottom wall 233, or disposed on the first side wall 231 and connected only to the first side wall 231, or connected to both the first side wall 231 and the bottom wall 233. This embodiment does not impose any restrictions on this. In this way, the second segment 33 of the rolled edge portion 3 abuts against the friction element 4 to increase the tightening torque when the threaded cover plate 2 is installed on the outer casing 1.

[0040] In some embodiments, the height of the first sidewall 231 is less than the height of the second sidewall 232. For example... Figure 4As shown, in the vertical direction, the distance between the top side of the first sidewall 231 and the bottom wall 233 is less than the distance between the top side of the second sidewall 232 and the bottom wall 233, that is, the height of the first sidewall 231 is less than the height of the second sidewall 232. Understandably, the sum of the heights of the first segment 32 mounted on the protruding rib 24 and the first sidewall 231 can be less than the height of the second sidewall 232. Thus, in the vertical direction, the end of the threaded cover plate 2 furthest from the accommodating space 11 (i.e., the top side of the second sidewall 232) can protrude from the top of the outer shell 1 (i.e., the top sides of the first segment 32 and the second segment 33 of the rolled edge portion 3), making it easier to tighten and loosen for disassembly.

[0041] In this embodiment, the friction element 4 is connected to both the sidewall and the bottom wall 233 of the groove 23. Specifically, refer to... Figure 1 , Figure 4 and Figure 5 Multiple friction elements 4 are simultaneously connected to both the first sidewall 231 and the bottom wall 233. In this case, the contact area between the friction elements 4 and the threaded cover plate 2 is larger, making the connection between the threaded cover plate 2 and the friction elements 4 more secure. Of course, the multiple friction elements 4 can also be connected only to the first sidewall 231, or multiple friction elements 4 can be connected only to the bottom wall 233, or some of the friction elements 4 can be connected only to the first sidewall 231, while others can be connected only to the bottom wall 233. This application does not limit this.

[0042] In some embodiments, the groove 23 is an arc-shaped groove, that is, the groove wall of the groove 23 is an arc-shaped wall, and its side wall and bottom wall 233 are smoothly connected without obvious boundary.

[0043] In some embodiments, the number of friction elements 4 is multiple, and the multiple friction elements 4 are all disposed within the groove 23 and spaced apart. For example, in this embodiment, the number of friction elements 4 is 8, and the 8 friction elements 4 are evenly disposed within the groove 23. Thus, in the circumferential direction of the groove 23, the rolled edge 3 and the 8 friction elements 4 can generate a more uniform tightening torque. Of course, in other embodiments, the number of friction elements 4 can be other than 8. Furthermore, when the number of friction elements 4 is two or more, the multiple friction elements 4 can also be unevenly distributed in the circumferential direction of the groove 23. Therefore, this application does not limit the number of friction elements 4 or the uniformity of their distribution within the groove 23.

[0044] In some embodiments, the friction element 4 is in the form of a rectangular block. Specifically, refer to... Figure 5The friction element 4 has a first edge 41, a second edge 42, and a third edge 43. The first edge 41 has a first end 411 and a second end 412, and the second edge 42 has a third end 421 and a fourth end 422. The first edge 41 and the second edge 42 are arranged opposite to each other. The first edge 41 is connected to the edge of the protruding ridge 24 through its first end 411, and the second edge 42 is connected to the edge of the protruding ridge 24 through its third end 421. The two ends of the third edge 43 are connected to the second end 412 and the fourth end 422, respectively. The first edge 41, the second edge 42, and the third edge 43 are all straight lines, and the angle between the third edge 43 and the first edge 41 at the second end 412 is a right angle, as is the angle between the third edge 43 and the second edge 42 at the fourth end 422. In this embodiment, the first edge 41, the second edge 42, and the third edge 43 are all located on the same plane as the protruding ridge 24. In this embodiment, the rectangular block-shaped friction element 4 is integrally formed with the threaded cover plate 2, and one of the long side surfaces of the friction element 4 is engaged with the first sidewall 231 without being exposed. Thus, when the threaded cover plate 2 is installed on the outer casing 1, the bottom side of the second segment 33 of the rolled edge portion 3 abuts against the first edge 41, the second edge 42, and the third edge 43, causing both the rolled edge portion 3 and the friction element 4 to undergo a certain deformation, increasing the frictional force between the rolled edge portion 3 and the friction element 4, and consequently increasing the tightening torque when the threaded cover plate 2 is installed on the outer casing 1.

[0045] In some embodiments, the friction element 4 has an arc-shaped edge that abuts against the rolled edge 3. (See reference) Figure 1 For example, unlike the aforementioned rectangular block-shaped friction element 4, the friction element 4 in this embodiment is provided with a fourth edge 44, which is arc-shaped, and both ends of the fourth edge 44 are connected to the edge of the protruding ridge 24. Combined with... Figure 1 and Figure 4 When the threaded cover plate 2 is installed on the outer casing 1, the bottom side of the second segment 33 of the rolled edge 3 abuts against the fourth edge 44, causing both the rolled edge 3 and the friction element 4 to deform to a certain extent. This increases the friction between the rolled edge 3 and the friction element 4, and consequently increases the tightening torque when the threaded cover plate 2 is installed on the outer casing 1. Moreover, because the friction element 4 in this embodiment has an arc-shaped edge, the relative rotation between the threaded cover plate 2 and the outer casing 1 is smoother during the installation or removal of the threaded cover plate 2, resulting in a better installation experience.

[0046] It is important to note that Figure 4 The second segment 33 and the friction element 4 interfere with each other structurally. In fact, both the second segment 33 and the friction element 4 will undergo certain deformation to maintain their mutual contact.

[0047] The filters mentioned in this article are not limited to oil filters; they can also be used in fuel filters such as diesel filters, as well as air filters.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A filter, characterized in that, The filter includes: The outer casing has an opening at one end and a rolled edge that surrounds the opening. A threaded cover plate is disposed at the opening of the housing, and the rolled edge wraps around the edge of the threaded cover plate. The threaded cover plate and the housing together define the internal space of the filter; wherein... The threaded cover plate is provided with a friction element, which abuts against the rolled edge portion.

2. The filter according to claim 1, characterized in that, The threaded cover plate is provided with a groove, and the friction element is disposed in the groove, with at least a portion of the rolled edge located in the groove and abutting against the friction element.

3. The filter according to claim 2, characterized in that, The groove is a square groove, and the square groove is provided with side walls and bottom walls.

4. The filter according to claim 3, characterized in that, The friction element is connected to the sidewall and bottom wall of the square groove.

5. The filter according to claim 3, characterized in that, The friction element is only connected to the bottom wall of the square groove.

6. The filter according to claim 3, characterized in that, The outer casing has an inner wall opposite to the threaded cover plate. The square groove is an annular groove. The sidewall of the square groove includes a first sidewall and a second sidewall. The first sidewall is located between the second sidewall and the inner wall. The height of the first sidewall is less than the height of the second sidewall.

7. The filter according to claim 2, characterized in that, The groove is an arc-shaped groove.

8. The filter according to claim 1, characterized in that, The friction element is in the shape of a rectangular block.

9. The filter according to claim 1, characterized in that, The friction element has an arc-shaped edge, and the arc-shaped edge of the friction element abuts against the rolled edge portion.

10. The filter according to any one of claims 2-9, characterized in that, The number of friction elements is multiple, and the multiple friction elements are arranged at intervals.

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