An external filter structure

Abstract

This utility model discloses an external filter structure, relating to the field of automotive filter technology, aiming to solve the problems of redundant parts and large space occupation in traditional transmission oil filters. The technical solution adopted includes an upper end cover, an inner frame, and a lower end cover. The inner frame is a cylindrical shell with open ends, and oil passage holes are formed on the side walls of the inner frame. Multiple sets of oil passage holes are provided. The upper end cover and the lower end cover are respectively connected to the two ends of the inner frame. Both the upper end cover and the lower end cover are provided with sealing components for sealing during installation. A filter element filter layer is also fitted on the outside of the inner frame. An outer sealing ring and a metal bushing are provided on the upper end cover. Compared with traditional products, this reduces the number of parts, saves radial and axial space, and reduces the cost and weight of the product, contributing to the industry's goal of integration and lightweight development.

Description

Technical Field

[0001] This utility model relates to the field of automotive filter technology, specifically to an external filter structure. Background Technology

[0002] Lightweighting of automobiles can improve fuel economy, acceleration performance, braking performance, handling stability, and driving range. Integration helps reduce weight, make parts more compact and save space. At the same time, integration can reduce assembly steps, improve production efficiency and reduce costs. Therefore, lightweighting and integration of automobiles are inevitable directions for development.

[0003] During operation, the oil in a motor vehicle's engine and transmission produces impurities due to high temperatures, friction, and oxidation, including metal particles that wear off. Without an oil filter, these impurities can exacerbate wear on moving parts and even lead to engine or transmission failure. Therefore, the oil filter is an indispensable component in a motor vehicle.

[0004] However, existing transmission oil filters still have shortcomings in their structural design and connection methods that are inconsistent with the trends of automotive lightweighting and integration. Specifically, traditional transmission oil filters need to be connected to the transmission cylinder block through a maintenance end cap, which increases the number of parts and does not meet the requirements of integration and weight reduction. At the same time, the presence of the maintenance end cap will occupy additional radial and axial space, resulting in a less compact arrangement of the oil filter in the engine compartment, low space utilization, and the multi-part assembly process also reduces production and maintenance efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide an external filter structure that can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model discloses an external filter structure. The technical solution adopted includes an upper end cover, an inner frame, and a lower end cover. The inner frame is a cylindrical shell with open ends, and oil passage holes are provided on the side wall of the inner frame. Multiple sets of oil passage holes are provided. The inner frame is connected to the upper end cover and the lower end cover at both ends respectively. Both the upper end cover and the lower end cover are provided with sealing components, which are used for sealing during installation. The inner skeleton is also fitted with a filter element and filter layer. The upper end cover and the lower end cover are provided with an outer convex edge structure and an inner convex edge structure on their facing surfaces. The outer convex edge structure and the inner convex edge structure are respectively used for the installation and positioning of the filter element filter layer and the inner skeleton. By incorporating an outer sealing ring and metal bushing into the upper end cover, the number of parts is reduced compared to traditional products, saving radial and axial space and lowering product cost and weight, thus contributing to the industry's goal of integration and lightweight development.

[0007] As a preferred embodiment of this utility model, the outer diameter of the filter element layer is smaller than the outer diameter of the upper end cover and the lower end cover.

[0008] As a preferred technical solution of this utility model, the outer convex edge structure includes a first outer convex edge and a second outer convex edge. The filter element filter layer is installed between the outer convex edge structure and the inner skeleton. The oil passage hole design of the inner skeleton ensures smooth flow of filtered oil. The precise positioning of the filter element filter layer ensures that the oil enters the system after complete filtration. It can effectively intercept impurities such as metal particles and protect the engine and transmission from wear.

[0009] As a preferred technical solution of this utility model, the sealing assembly includes an outer sealing ring and an inner sealing ring. An outer sealing groove and an inner sealing groove are respectively provided on the first outer protrusion and the second outer protrusion. The outer sealing ring and the inner sealing ring are respectively snapped into the outer sealing groove and the inner sealing groove. The sealing ring is positioned by a dedicated sealing groove to avoid displacement or deformation during assembly, effectively preventing oil leakage from external gaps and internal short circuits, and meeting the sealing requirements of hydraulic and lubrication systems.

[0010] As a preferred embodiment of the present invention, the inner convex edge structure includes a first inner convex edge and a second inner convex edge, wherein a first annular groove and a second annular groove are respectively formed on the first inner convex edge and the second inner convex edge, and a protrusion adapted to the first annular groove and the second annular groove is provided on the inner wall of the inner skeleton.

[0011] As a preferred technical solution of this utility model, the upper end cover is also provided with a support lug for connection, and the support lug is provided with a metal bushing. By setting an outer sealing ring and a metal bushing on the upper end cover, the sealing reliability of the connection between the upper end cover and the cylinder body is ensured, and the structural strength of the connection part is enhanced by the metal bushing, avoiding connection failure caused by repeated disassembly and assembly.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting an outer sealing ring and a metal bushing on the upper end cover, this utility model reduces the number of parts, saves radial and axial space, and reduces the cost and weight of the product, thus helping the industry achieve the goal of integration and lightweight development.

[0013] By setting an outer sealing ring and a metal bushing on the upper end cover, the sealing reliability of the connection between the upper end cover and the cylinder body is ensured, and the structural strength of the connection part is enhanced by the metal bushing, avoiding connection failure caused by repeated disassembly and assembly. The design of the oil passage holes in the inner skeleton ensures smooth flow of filtered oil, and the precise positioning of the filter element and filter layer ensures that the oil is completely filtered before entering the system. It can effectively intercept impurities such as metal particles and protect the engine and transmission from wear. The sealing ring is positioned by a special sealing groove to prevent displacement or deformation during assembly, effectively preventing oil leakage from external gaps and internal short circuits, and meeting the sealing requirements of hydraulic and lubrication systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a partial sectional view of the present invention.

[0015] In the diagram: 1. Top cap; 2. Outer sealing ring; 3. Inner skeleton; 4. Filter element / filter layer; 5. Bottom cap; 6. Inner sealing ring; 7. Metal bushing; 11. Outer sealing groove; 12. First outer protrusion; 13. First inner protrusion; 14. First annular groove; 15. Support lug; 31. Protrusion; 32. Oil passage hole; 51. Inner sealing groove; 52. Second outer protrusion; 53. Second inner protrusion; 54. Second annular groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0017] like Figures 1 to 4 As shown, this utility model discloses an external filter structure. The technical solution adopted is as follows: it includes an upper end cover 1, an inner frame 3 and a lower end cover 5. The inner frame 3 is a cylindrical shell with open ends, and oil passage holes 32 are provided on the side wall of the inner frame 3. Multiple sets of oil passage holes 32 are provided. The inner frame 3 is connected to the upper end cover 1 and the lower end cover 5 at both ends respectively. Both the upper end cover 1 and the lower end cover 5 are provided with sealing components, which are used for sealing during installation. The inner frame 3 is also fitted with a filter element and filter layer 4.

[0018] It includes an upper end cover 1, an outer sealing ring 2, an inner skeleton 3, a filter element filter layer 4, a lower end cover 5, and an inner sealing ring 6. The upper end cover 1 of the filter element is integrally injection molded and includes a metal bushing 7 and a support lug 15. The upper end cover 1 of the filter element is equipped with an outer sealing ring 2, and the lower end cover 5 of the filter element is equipped with an inner sealing ring 6.

[0019] The inner skeleton 3 is a cylindrical shell with open ends. Multiple sets of oil passage holes 32 are evenly opened on its side wall. The oil passage holes 32 are used to allow the filtered oil to enter the internal channel of the inner skeleton 3, so as to realize the conduction of oil.

[0020] The inner frame 3 is connected to an upper end cover 1 and a lower end cover 5 at its two axial ends, and both the upper end cover 1 and the lower end cover 5 are provided with sealing components to achieve the sealing between the filter and the external mounting structure and to prevent leakage of internal oil.

[0021] The sealing assembly includes an outer sealing ring 2 and an inner sealing ring 6: an outer sealing groove 11 is provided on the surface of the upper end cover 1 and the lower end cover 5 facing each other, and the outer sealing ring 2 is engaged in the outer sealing groove 11; an inner sealing groove 51 is provided on the surface of the lower end cover 5 and the upper end cover 1 facing each other, and the inner sealing ring 6 is engaged in the inner sealing groove 51.

[0022] The upper end cover 1 and the lower end cover 5 have outwardly protruding edge structures on their facing surfaces, specifically the first outwardly protruding edge 12 of the upper end cover 1 and the second outwardly protruding edge 52 of the lower end cover 5. The filter element filter layer 4 is fitted outside the inner frame 3, and the two axial ends of the filter element filter layer 4 abut against the upper end cover 1 and the lower end cover 5 respectively. That is, the filter element filter layer 4 is limited between the outwardly protruding edge structure and the inner frame 3 to achieve precise positioning and avoid axial movement. At the same time, the outer diameter of the filter element filter layer 4 is smaller than the outer diameter of the upper end cover 1 and the lower end cover 5. That is, the outer side wall of the filter element filter layer 4 is connected to the first outwardly protruding edge 12 and the second outwardly protruding edge 52 to ensure that the end cover can protect the filter layer and prevent the filter layer from being damaged by bumps during assembly or use.

[0023] The facing surfaces of the upper end cover 1 and the lower end cover 5 are also provided with an inner protruding edge structure, specifically a first inner protruding edge 13 of the upper end cover 1 and a second inner protruding edge 53 of the lower end cover 5; the inner wall of the first inner protruding edge 13 is provided with a first annular groove 14, the inner wall of the second inner protruding edge 53 is provided with a second annular groove 54, and the inner wall of the inner frame 3 is integrally formed with a protrusion 31 that matches the first annular groove 14 and the second annular groove 54; during assembly, the two ends of the inner frame 3 are respectively fitted into the inner sides of the first inner protruding edge 13 and the second inner protruding edge 53, and the protrusion 31 is inserted into the corresponding annular groove, so as to achieve a stable connection between the inner frame 3 and the end cover.

[0024] The upper cover 1 has an integrally formed support ear 15 on its outer peripheral wall. The support ear 15 has a mounting hole, and a metal bushing 7 is press-fitted into the mounting hole. The metal bushing 7 can prevent the mounting bolt from directly contacting the plastic support ear 15, prevent repeated disassembly from causing wear on the support ear 15, and extend its service life. At the same time, the filter can be quickly fixed to the external mounting base through the support ear 15, improving assembly efficiency.

[0025] The working principle of this utility model: By setting an outer sealing ring 2 and a metal bushing 7 on the upper end cover 1, it is directly pressed into the engine or transmission cylinder block and connected with bolts. Radial sealing is achieved through the outer sealing ring 2 to ensure that the product is sealed and does not leak. Tightening the bolts ensures that the product does not loosen.

[0026] The hydraulic oil to be filtered enters from the external space of the filter and passes through the filter element layer 4 under the action of system pressure. Metal fragments and impurities in the oil are intercepted by the filter element layer 4. The filtered clean oil enters the internal channel of the inner skeleton 3 through the oil passage 32 on the side wall of the inner skeleton 3, and then flows out from the lower end of the inner skeleton 3 into the downstream pipeline of the hydraulic system.

[0027] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0028] Components not described in detail in this article are existing technologies.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external filter structure, characterized in that: It includes an upper end cover (1), an inner frame (3) and a lower end cover (5). The inner frame (3) is a cylindrical shell with open ends, and oil passage holes (32) are provided on the side wall of the inner frame (3). Multiple sets of oil passage holes (32) are provided. The inner frame (3) is connected to the upper end cover (1) and the lower end cover (5) at both ends respectively. Both the upper end cover (1) and the lower end cover (5) are provided with sealing components, which are used for sealing during installation. The inner skeleton (3) is also fitted with a filter element (4) on the outside. The upper end cover (1) and the lower end cover (5) are provided with an outer convex edge structure and an inner convex edge structure on their facing surfaces. The outer convex edge structure and the inner convex edge structure are used for the installation and positioning of the filter element filter layer (4) and the inner skeleton (3), respectively.

2. The external filter structure according to claim 1, characterized in that: The outer diameter of the filter element (4) is smaller than the outer diameter of the upper end cap (1) and the lower end cap (5).

3. An external filter structure according to claim 1 or 2, characterized in that: The outer convex edge structure includes a first outer convex edge (12) and a second outer convex edge (52), and the filter element filter layer (4) is installed between the outer convex edge structure and the inner skeleton (3).

4. The external filter structure according to claim 3, characterized in that: The sealing assembly includes an outer sealing ring (2) and an inner sealing ring (6). An outer sealing groove (11) and an inner sealing groove (51) are respectively provided on the first outer protrusion (12) and the second outer protrusion (52). The outer sealing ring (2) and the inner sealing ring (6) are respectively engaged in the outer sealing groove (11) and the inner sealing groove (51).

5. The external filter structure according to claim 1, characterized in that: The inner convex edge structure includes a first inner convex edge (13) and a second inner convex edge (53). A first annular groove (14) and a second annular groove (54) are respectively provided on the first inner convex edge (13) and the second inner convex edge (53). The inner wall of the inner skeleton (3) is provided with a protrusion (31) that matches the first annular groove (14) and the second annular groove (54).

6. The external filter structure according to claim 1, characterized in that: The upper end cap (1) is also provided with a support lug (15) for connection, and the support lug (15) is provided with a metal bushing (7).

Images