An oil drain filter device with easy replacement of the filter element

Abstract

An oil drain filter device with convenient filter element replacement includes an oil filter assembly. A lower cover is threadedly connected to the lower end of the oil filter assembly, and a filter element assembly is installed in the lower cover. A fixing seat is fixedly installed on the lower outer edge of the filter element assembly, and a nut is fixedly installed in the fixing seat. An oil drain hole is provided at the bottom of the lower cover, and a fixing sleeve is fixedly installed below the oil drain hole. An oil drain bolt is provided in the oil drain hole, and the upper end of the oil drain bolt has an external thread, which is threaded to the nut. A first radial pin hole is provided in the lower side wall of the oil drain bolt, and a second radial pin hole is provided in the side wall of the fixing sleeve. A safety pin passes through both the second and first radial pin holes. In normal operation, the oil drain bolt is threadedly connected to the filter element assembly. When the filter element assembly needs to be replaced, simply remove the safety pin and the oil drain bolt to drain the oil, and then replace the filter element assembly. The structure is simple, the oil draining operation is convenient, and the filter element assembly replacement is easy.

Description

Technical Field

[0001] This utility model relates to the field of physics, and more particularly to filtration devices, especially an oil drain filter device with convenient filter element replacement. Background Technology

[0002] When the engine is running, engine oil needs to be supplied to the interaction surfaces of the engine's friction components to form a protective oil film, reducing damage to the components caused by friction and carrying away frictional heat. As the engine continues to operate, the engine oil becomes contaminated with oxides, and metal particles, carbon particles, and other impurities produced during engine operation, along with other impurities generated after oil oxidation, remain in the oil passages. If the engine continues to operate with contaminated engine oil, the working surfaces of the engine's friction components, such as the crankshaft and cylinders, will gradually wear and become damaged. If further deterioration is allowed, it can lead to melting and pose a safety hazard. Therefore, continuously maintaining the cleanliness of the engine oil is crucial, directly affecting the engine's lifespan and performance. Thus, a filter device needs to be installed in the engine oil circulation circuit to continuously ensure the cleanliness of the engine oil. When the engine is running, the engine oil, under the action of the pump, enters the oil reservoir of the oil filter assembly through the inlet. After being filtered by the filter paper, impurities and dust are trapped on one side of the reservoir, while the clean oil flows into the clean chamber on the center side and is then supplied to the engine crankshaft, cylinders, and other components through the outlet. When a vehicle travels a certain number of kilometers, the dust and impurities collected by the old filter element reach saturation during operation, causing extensive clogging of the filter paper surface. This increases the resistance in the oil supply circuit of the engine oil lubrication system, affecting the normal operation of the engine, and thus requires replacement of the filter element assembly.

[0003] In the prior art, the filter device disclosed in patent document (EP3034147B1) has an overly complex oil discharge structure. The lower support plate of the filter has a rotating groove at the bottom, and a slider is installed at the bottom of the drain pin. The longitudinal length of the slider is greater than the inlet width of the rotating groove, and the lateral width is less than the inlet width of the groove. When the slider is rotated at different angles, it is in two states: locked in the rotating groove and unlocked in the rotating groove, so as to realize the normal operation of the filter and the state of oil discharge and filter element replacement. This solution has a complex structure, wastes materials, has high manufacturing costs, is cumbersome to operate, and has low efficiency in replacing and installing filter element components. Utility Model Content

[0004] The purpose of this utility model is to provide an oil drain filter device with convenient filter element replacement, which solves the technical problems of complex oil drain structure, cumbersome operation and low filter element replacement efficiency in the prior art.

[0005] This utility model provides an oil drain filter device for convenient replacement of filter element assemblies, including an oil filter assembly. A lower cover is threadedly connected to the lower end of the oil filter assembly. A filter element assembly is installed in the lower cover. A fixing seat is fixedly disposed on the lower side of the filter element assembly adjacent to its outer edge. A nut is fixedly embedded in the fixing seat. An oil drain hole is provided at the bottom of the lower cover. A fixing sleeve is fixedly disposed on both the upper and lower sides of the oil drain hole. The oil drain hole communicates with the inner cavity of the lower cover through the upper end port of the fixing sleeve. The seat and the drain hole are coaxially arranged. An oil drain bolt is provided in the drain hole. The upper end of the oil drain bolt is provided with an external thread. The upper end of the oil drain bolt is threaded to the nut through the external thread. A sealing groove is provided on the side of the oil drain bolt. A sealing ring is provided in the sealing groove. The sealing ring is provided in a sealing fit between the oil drain bolt and the inner wall of the oil drain hole. A first radial pin hole is provided in the lower side wall of the oil drain bolt. A second radial pin hole is provided in the side wall of the fixing sleeve, which is coaxial with the first radial pin hole. A safety pin passes through the second radial pin hole and the first radial pin hole.

[0006] Furthermore, the filter element assembly includes a central support frame, with filter paper sleeved on the outside of the central support frame. An upper support plate and a lower support plate are fixedly connected to the upper and lower sides of the central support frame, respectively, and the fixing seat is fixedly connected to the lower support plate.

[0007] Compared with the prior art, the advantages of this invention are positive and significant. During normal operation, the drain bolt is threadedly connected to the filter element assembly, and a sealing ring forms a closed oil reservoir within the filter assembly. When the filter element assembly needs replacement, simply remove the safety pin and drain bolt to drain the oil, and then replace the filter element assembly. This invention uses a bolt-drain structure, which is simple in structure, easy to operate, convenient to replace the filter element assembly, and cost-effective. Attached Figure Description

[0008] Figure 1 This is a cross-sectional schematic diagram of an oil drain filter device with a convenient filter element replacement according to the present invention.

[0009] Figure 2 This is a top view schematic diagram of the filter element assembly in an oil drain filter device with convenient filter element replacement according to the present invention.

[0010] Figure 3 for Figure 2 A cross-sectional view.

[0011] Figure 4 This is a schematic diagram illustrating the filter element replacement process of an oil drain filter device with a convenient filter element replacement according to the present invention.

[0012] Figure 5This is a schematic diagram illustrating the filter element replacement process of an oil drain filter device with a convenient filter element replacement according to the present invention.

[0013] Figure 6 This is a schematic diagram illustrating the filter element replacement process of an oil drain filter device with a convenient filter element replacement according to the present invention.

[0014] Figure 7 This is a schematic diagram illustrating the filter element replacement process of an oil drain filter device with a convenient filter element replacement according to the present invention.

[0015] Figure 8 This is a schematic diagram illustrating the filter element replacement process of an oil drain filter device with a convenient filter element replacement according to the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included in the protection scope of the present invention. The use of directional terms such as up, down, front, back, left, right, middle, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0017] like Figures 1-8 As shown, this utility model provides an oil drain filter device with convenient filter element replacement, including an oil filter assembly 1. A lower cover 2 is threadedly connected to the lower end of the oil filter assembly 1. A filter element assembly 3 is installed in the lower cover 2. A fixing seat 4 is fixedly installed on the lower side of the filter element assembly 3 adjacent to its outer edge. A nut 5 is fixedly embedded in the fixing seat 4. An oil drain hole 6 is provided at the bottom of the lower cover 2. A fixing sleeve 7 is fixedly installed on both the upper and lower sides of the oil drain hole 6. The oil drain hole 6 communicates with the inner cavity of the lower cover 2 through the upper end port of the fixing sleeve 7. The fixing seat 4 and... The oil drain hole 6 is coaxially arranged, and an oil drain bolt 8 is provided in the oil drain hole 6. The upper end of the oil drain bolt 8 is provided with external thread, and the upper end of the oil drain bolt 8 is threadedly connected to the nut 5 through the external thread. A sealing groove is provided in the side of the oil drain bolt 8, and a sealing ring 9 is provided in the sealing groove. The sealing ring 9 is provided in a sealing fit between the oil drain bolt 8 and the inner wall of the oil drain hole 6. A first radial pin hole 10 is provided in the lower side wall of the oil drain bolt 8, and a second radial pin hole 11 coaxial with the first radial pin hole 10 is provided in the side wall of the fixing sleeve 7. A safety pin 12 passes through the second radial pin hole 11 and the first radial pin hole 10.

[0018] Furthermore, the filter element assembly 3 includes a central support frame 13, with filter paper 14 sleeved on the outside of the central support frame 13. An upper support plate 15 and a lower support plate 16 are fixedly connected to the upper and lower sides of the central support frame 13, respectively, and the fixing seat 4 is fixedly connected to the lower support plate 16.

[0019] Specifically, the filter paper 14 is a corrugated folded filter paper, made of a high-precision filtration efficiency and high dust holding capacity environmentally friendly new resin fiber material. The oil drain nut 5 is an oxidation-resistant hard metal part. The oil drain bolt 8, lower support plate 16, central support frame 13, upper support plate 15, and safety pin 12 are injection molded from high and low temperature resistant and diesel fuel resistant polymer engineering plastics.

[0020] Specifically, the specific structure and principle of the oil filter assembly 1 and the filter element assembly 3 in this utility model, as well as other aspects not described in detail, all adopt well-known solutions in the prior art, which are understood and implemented by those skilled in the art, and will not be elaborated here.

[0021] The replacement steps for filter element assembly 3 are as follows:

[0022] (1) Remove the safety pin 12 and unlock the drain bolt 8.

[0023] (2) Rotate the drain bolt 8 to unscrew it, and the oil will be discharged from the drain hole 6.

[0024] (3) such as Figure 4 As shown, the lower cover 2, along with the filter element assembly 3, is screwed off from the oil filter assembly 1, and then the old filter element assembly 3 is removed from the lower cover 2.

[0025] (4) such as Figure 5 As shown, the new filter element assembly 3 (with the drain bolt 8 already installed) is installed into the lower cover 2, and the drain bolt 8 is installed into the drain hole 6.

[0026] (5) such as Figure 6 As shown, the lower cover 2 is fixed to the oil filter assembly 1 by threaded installation, and the drain bolt 8 is finely adjusted so that the first radial pin hole 10 on the drain bolt 8 is aligned with the second radial pin hole 11 on the lower cover 2.

[0027] (6) For example Figure 7 , Figure 8 As shown, the safety pin 12 is inserted into the first radial pin hole 10 and the second radial pin hole 11, and the replacement and installation of the filter element assembly 3 is completed.

[0028] When the present invention is working normally, the drain bolt 8 is threadedly connected to the filter element assembly 3. The sealing ring 9 forms a sealed oil storage chamber inside the filter assembly 1. When the filter element assembly 3 needs to be replaced, simply remove the safety pin 12 and the drain bolt 8 to drain the oil first, and then the filter element assembly 3 can be replaced. The present invention adopts a bolt drain structure, which is simple in structure, easy to drain oil, convenient to replace the filter element assembly 3, and saves costs.

Claims

1. An oil drain filter device with convenient filter element replacement, characterized in that, The system includes an oil filter assembly. The lower end of the oil filter assembly is threadedly connected to a lower cover. A filter element assembly is installed in the lower cover. A fixing seat is fixedly installed on the lower side of the filter element assembly adjacent to its outer edge. A nut is fixedly embedded in the fixing seat. An oil drain hole is provided at the bottom of the lower cover. A fixing sleeve is fixedly installed on both the upper and lower sides of the oil drain hole. The oil drain hole communicates with the inner cavity of the lower cover through the upper end of the fixing sleeve. The fixing seat is coaxially arranged with the oil drain hole. An oil drain bolt is provided in the oil drain hole. The upper end of the oil drain bolt has an external thread, which is threaded to the nut. A sealing groove is provided on the side of the oil drain bolt, and a sealing ring is provided in the sealing groove. The sealing ring is sealed between the oil drain bolt and the inner wall of the oil drain hole. A first radial pin hole is provided in the lower side wall of the oil drain bolt. A second radial pin hole, coaxial with the first radial pin hole, is provided in the side wall of the fixing sleeve. Safety pins pass through the second and first radial pin holes.

2. The oil drain filter device for convenient replacement of filter element assembly according to claim 1, characterized in that, The filter element assembly includes a central support frame, with filter paper sleeved on the outside of the central support frame. An upper support plate and a lower support plate are fixedly connected to the upper and lower sides of the central support frame, respectively, and the fixing seat is fixedly connected to the lower support plate.

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