Fluid filter and method of producing the same

Abstract

This invention discloses a fluid filter and its manufacturing method. A front seat is located inside one end of the outer casing, and a rear seat is located inside the other end. A connecting pipe is provided between the front and rear seats, and filter paper is fitted around the outer ring of the connecting pipe. A limiting groove is formed on the inner wall of the front seat on the opposite side of the connecting pipe, and a movable rod is slidably connected to the inner wall of the limiting groove. This invention has the following advantages: When the engine is running, engine oil pushes a silicone ring through the oil inlet, which in turn pushes a mounting ring. The mounting ring then pushes the movable rod to compress a first spring, facilitating the entry of engine oil into the filter. When the engine stops running, the mounting ring is pushed by the spring force of the first spring, which in turn pushes the silicone ring to seal the oil inlet, thus preventing oil backflow. This effectively avoids the situation where the sealing effect is reduced due to prolonged use of silicone or rubber check valves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a fluid filter and a production method thereof. BACKGROUND

[0002] The filter refers to the accessory that filters impurities or gas through filter paper, and generally refers to the automobile filter, which is an accessory of the engine. The oil filter is located in the lubricating system of the engine, the upstream of which is the oil pump, and the downstream of which is each part that needs to be lubricated in the engine. The oil filter filters out harmful impurities in the oil from the oil sump to provide clean oil to the moving pairs such as the crankshaft, connecting rod, camshaft, supercharger and piston ring, so as to play the roles of lubrication, cooling and cleaning, thereby prolonging the service life of these parts.

[0003] In the existing spin-on oil filter, in order to avoid the backflow of oil in the filter and pipeline after the engine stops, a silica gel or rubber check valve is usually arranged at the oil inlet hole of the filter. However, the deformation recovery ability of the silica gel or rubber check valve will decrease after long-term use and deformation caused by high oil temperature, so that the check valve cannot seal the oil inlet hole after the engine stops, resulting in the backflow of oil. SUMMARY

[0004] The technical problem to be solved by the present application is that in the existing spin-on oil filter, in order to avoid the backflow of oil in the filter and pipeline after the engine stops, a silica gel or rubber check valve is usually arranged at the oil inlet hole of the filter. However, the deformation recovery ability of the silica gel or rubber check valve will decrease after long-term use and deformation caused by high oil temperature, so that the check valve cannot seal the oil inlet hole after the engine stops, resulting in the backflow of oil. Therefore, the present application provides a fluid filter and a production method thereof to solve the above problems.

[0005] The technical solution adopted by the present application to solve the technical problem is: a fluid filter and a production method thereof, which comprise: an outer shell, an inner front seat is arranged at one end of the outer shell, an inner rear seat is arranged at the other end of the outer shell, a communication pipe is arranged between the front seat and the rear seat, a filter paper is sleeved on the outer circle of the communication pipe, a limiting groove is formed in the inner wall of the side of the front seat opposite to the communication pipe, an activity rod is slidably connected to the inner wall of the limiting groove, a first spring is sleeved on the outer wall of one end of the activity rod outside the front seat, a mounting ring is fixedly connected to the end of the activity rod penetrating through the first spring, and a silica gel ring is arranged on the side of the mounting ring opposite to the activity rod.

[0006] As a preferred technical solution of the present application, a silica gel pad is arranged at the middle of the same side of the front seat and the silica gel ring, the silica gel pad is located in the middle of the silica gel ring, and a corrugated silica gel ring is sealingly connected between the silica gel ring and the silica gel pad.

[0007] As a preferred technical scheme of the present application, the front seat is provided with a front sealing seat opposite to one end of the communication pipe, the rear seat is provided with a rear sealing seat opposite to one end of the communication pipe, the front sealing seat and the rear sealing seat are of the same size, and the outer circle of the front sealing seat and the rear sealing seat correspondingly sleeves the two ends of the communication pipe.

[0008] As a preferred technical scheme of the present application, the rear seat is provided with a spring clamping seat opposite to one side of the rear sealing seat, the inside of the shell is provided with an internal thread ring opposite to one side of the spring clamping seat, and the internal thread ring is threadedly connected with an external thread ring.

[0009] As a preferred technical scheme of the present application, the external thread ring is fixedly connected with a second spring at one end of the rear seat, and the second spring is sleeved on the spring clamping seat at one end of the rear seat.

[0010] As a preferred technical scheme of the present application, one side of the middle part of the rear seat is slidingly connected with a limiting rod, one end of the limiting rod is fixedly connected with a circular plate at one end of the communication pipe, a third spring is sleeved on one end of the limiting rod, a sealing ring is sleeved between the circular plate and the rear seat, and the sealing ring is fixedly connected with the circular plate.

[0011] As a preferred technical scheme of the present application, a bypass oil return hole is formed in the side of the rear seat opposite to the sealing ring, and a plurality of bypass oil return holes are arranged.

[0012] As a preferred technical scheme of the present application, the front seat and the rear seat are provided with sealing silica gel at the two ends of the communication pipe, the inside of the shell is provided with a sealing plate at one end of the front seat, one side of the sealing plate is attached with a silica gel pad, and the middle part of the sealing plate is provided with a total oil return port.

[0013] As a preferred technical scheme of the present application, the shell is provided with a connecting seat on the outer wall at one end of the sealing plate, and the connecting seat is provided with an oil inlet hole in the side opposite to the silica gel ring of the sealing plate.

[0014] The production method of the fluid filter comprises the following steps:

[0015] S1: first, the second spring is fixed by being threadedly connected in the internal thread ring inside the shell through the external thread ring;

[0016] S2: then, the rear seat is clamped on the second spring inside the shell through the spring clamping seat, one end of the communication pipe is sleeved on the rear sealing seat, and the front seat is sleeved on the other end of the communication pipe through the front sealing seat;

[0017] S3: the sealing plate is abutted and attached on the silica gel pad in the front seat, then the shell at one end of the sealing plate is crimped by a machine, so that the sealing plate is fixed inside the shell, finally, the connecting seat is crimped on the shell at one end of the sealing plate, and the connecting seat is attached to the sealing plate.

[0018] The present application has the following advantages: when the engine is running, the oil pushes the silica gel ring through the oil inlet hole, the silica gel ring pushes the mounting ring, the movable rod is pushed to compress the first spring through the mounting ring, and the operation is convenient for the oil to enter the inside of the filter, when the engine stops running, the mounting ring can be pushed under the elastic force of the first spring, the silica gel ring is pushed to seal the oil inlet hole through the mounting ring, so that the backflow of the oil can be prevented, and the situation that the sealing effect is reduced due to long-time use of the silica gel or rubber check valve can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure schematic view of a preferred embodiment of the present application;

[0020] Figure 2 is a sectional structure schematic view of a preferred embodiment of the present application;

[0021] Figure 3 is a structure schematic view of a second spring and an outer thread ring of a preferred embodiment of the present application;

[0022] Figure 4 is a sectional structure schematic view of a front seat of a preferred embodiment of the present application;

[0023] Figure 5 is a sectional structure schematic view of a rear seat of a preferred embodiment of the present application;

[0024] Figure 6 is a sectional structure schematic view of a rear seat of a preferred embodiment of the present application; Figure 4 is an enlarged schematic view of structure A.

[0025] Explanation of reference signs: 1, shell; 2, front seat; 3, rear seat; 4, communication pipe; 5, filter paper; 6, limiting groove; 7, movable rod; 8, first spring; 9, mounting ring; 10, silica gel ring; 11, silica gel pad; 12, corrugated silica gel ring; 13, front sealing seat; 14, rear sealing seat; 15, spring clamping seat; 16, inner thread ring; 17, outer thread ring; 18, second spring; 19, limiting rod; 20, round plate; 21, third spring; 22, sealing ring; 23, bypass oil return hole; 24, sealing silica gel; 25, sealing plate; 26, connecting seat; 27, oil inlet hole; 28, total oil return port. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The present application will be further described below with reference to the drawings.

[0029] Please refer to Figures 1-6 The present application is a kind of fluid filter and its production method, comprising: shell 1, one end of shell 1 is internally provided with front seat 2, the other end of shell 1 is internally provided with rear seat 3, communication pipe 4 is arranged between front seat 2 and rear seat 3, filter paper 5 is sleeved on the outer ring of communication pipe 4, limit groove 6 is opened on the inner wall of the side opposite to communication pipe 4 of front seat 2, movable rod 7 is slidably connected in limit groove 6, first spring 8 is sleeved on the outer wall of one end of movable rod 7 located outside front seat 2, mounting ring 9 is fixedly connected and installed on one end of movable rod 7 penetrating first spring 8, silica gel ring 10 is arranged on the side opposite to movable rod 7 of mounting ring 9.

[0030] As shown in Figure 4 and Figure 6 , wherein the same side of front seat 2 and silica gel ring 10 is provided with silica gel pad 11 in the middle, which facilitates the sealing between the sealing plate 25 and the silica gel pad 11, the silica gel pad 11 is located in the middle of the silica gel ring 10, the silica gel ring 10 and the silica gel pad 11 are sealingly connected with corrugated silica gel ring 12, which facilitates the silica gel ring 10 and the silica gel pad 11 to form an integral structure, front sealing seat 13 is arranged on one end of front seat 2 opposite to communication pipe 4, rear sealing seat 14 is arranged on one end of rear seat 3 opposite to communication pipe 4, front sealing seat 13 and rear sealing seat 14 are the same size, communication pipe 4 is sleeved on the inner wall of the outer ring of front sealing seat 13 and rear sealing seat 14, which facilitates the sealing connection of the two ends of communication pipe 4, in combination with Figure 5As shown, the rear seat 3 is provided with a spring holder 15 on the side opposite to the rear sealing seat 14, the inner thread ring 16 is provided inside the shell 1 opposite to the spring holder 15, the outer thread ring 17 is threadedly connected to the inner thread ring 16, the second spring 18 is fixedly connected to one end of the outer thread ring 17, and the second spring 18 is sleeved on the spring holder 15 at one end of the rear seat 3, so as to fix the second spring 18 inside the shell 1.

[0031] The limiting rod 19 is slidably connected to one side of the middle part of the rear seat 3, the circular plate 20 is fixedly connected to one end of the communicating pipe 4, the third spring 21 is sleeved on one end of the limiting rod 19, the sealing ring 22 is sleeved between the circular plate 20 and the rear seat 3, and the sealing ring 22 is fixedly connected to the circular plate 20. When the filter paper 5 is blocked, the oil bypasses the bypass oil return holes 23 and enters the communicating pipe 4, the sealing ring 22 is fixedly connected to the circular plate 20, the bypass oil return holes 23 are arranged on the side of the rear seat 3 opposite to the sealing ring 22, the communicating pipe 4 is provided with the sealing silica gel 24 at both ends, the sealing plate 25 is arranged inside one end of the shell 1, the sealing plate 25 is attached to the silica gel pad 11 on one side, the total oil return hole 28 is arranged in the middle of the sealing plate 25, the connecting seat 26 is arranged on the outer wall of one end of the shell 1, and the connecting seat 26 is provided with the oil inlet hole 27 on the side opposite to the silica gel ring 10.

[0032] A production method of a fluid filter, comprising the following steps:

[0033] S1: first, the second spring 18 is fixed by being threadedly connected to the inner thread ring 16 inside the shell 1 through the outer thread ring 17;

[0034] S2: then, the rear seat 3 is clamped on the second spring 18 inside the shell 1 through the spring holder 15, one end of the communicating pipe 4 is sleeved on the rear sealing seat 14, and the front seat 2 is sleeved on the other end of the communicating pipe 4 through the front sealing seat 13;

[0035] S3: the sealing plate 25 is abutted and attached to the silica gel pad 11 in the front seat 2, then the one end of the shell 1 is pressure-welded by a machine, so that the sealing plate 25 is fixed inside the shell 1, finally, the connecting seat 26 is pressure-welded on the one end of the shell 1 located at the sealing plate 25, and the connecting seat 26 is attached to the sealing plate 25.

[0036] Specifically, when the engine is running, the oil is transported to the oil inlet hole 27, the oil pushes the silica gel ring 10 through the oil inlet hole 27, the silica gel ring 10 pushes the mounting ring 9, and the movable rod 7 is pushed to compress the first spring 8 through the mounting ring 9, so that the oil enters the filter inside. When the engine stops running, the mounting ring 9 can be pushed under the elastic force of the first spring 8, the silica gel ring 10 is pushed to seal the oil inlet hole 27 through the mounting ring 9, so that the oil backflow can be prevented.

[0037] The above merely illustrates the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

[0038] Other parts not described in the present application are all prior art, and thus will not be described here.

[0039] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid filter comprising: The shell (1) is characterized in that the shell (1) is internally provided with a front seat (2) at one end, the shell (1) is internally provided with a rear seat (3) at the other end, a communication pipe (4) is arranged between the front seat (2) and the rear seat (3), a filter paper (5) is sleeved on the outer ring of the communication pipe (4), a limiting groove (6) is formed in the inner wall of the side opposite to the communication pipe (4) of the front seat (2), a movable rod (7) is slidably connected to the inner wall of the limiting groove (6), a first spring (8) is sleeved on the outer wall of one end of the movable rod (7) outside the front seat (2), a mounting ring (9) is fixedly connected to one end of the movable rod (7) penetrating through the first spring (8), a silica gel ring (10) is arranged on the side opposite to the mounting ring (7) of the movable rod (7); A silica gel pad (11) is arranged on the same side of the front seat (2) and the silica gel ring (10) and located in the middle of the silica gel ring (10), and a corrugated silica gel ring (12) is sealingly connected between the silica gel ring (10) and the silica gel pad (11); A front sealing seat (13) is arranged on one end of the front seat (2) opposite to the communication pipe (4), a rear sealing seat (14) is arranged on one end of the rear seat (3) opposite to the communication pipe (4), the front sealing seat (13) and the rear sealing seat (14) are the same in size and specification, and the communication pipe (4) is sleeved on the outer ring of the front sealing seat (13) and the rear sealing seat (14) corresponding to the inner ring; A spring clamping seat (15) is arranged on the side opposite to the rear sealing seat (14) of the rear seat (3), an internal thread ring (16) is arranged inside the shell (1) opposite to the spring clamping seat (15), and an external thread ring (17) is threadedly connected to the inner ring of the internal thread ring (16); The external thread ring (17) is fixedly connected to a second spring (18) at one end of the rear seat (3), and the second spring (18) is sleeved on the spring clamping seat (15) at one end of the rear seat (3); A limiting rod (19) is slidably connected to one side of the middle of the rear seat (3), a circular plate (20) is fixedly connected to one end of the limiting rod (19) opposite to the communication pipe (4), a third spring (21) is sleeved on one end of the limiting rod (19), a sealing ring (22) is sleeved on the limiting rod (19) between the circular plate (20) and the rear seat (3), and the sealing ring (22) is fixedly connected to the circular plate (20).

2. A fluid filter as claimed in claim 1, wherein A bypass oil return hole (23) is formed on the side of the rear seat (3) opposite to the sealing ring (22), and a plurality of bypass oil return holes (23) are arranged.

3. A fluid filter as claimed in claim 1, wherein Sealing silica gel (24) is arranged on the two ends of the communication pipe (4) of the front seat (2) and the rear seat (3), a sealing plate (25) is arranged inside the shell (1) at one end of the front seat (2), the sealing plate (25) is attached to the silica gel pad (11) on one side, and a total oil return port (28) is arranged in the middle of the sealing plate (25).

4. A fluid filter as claimed in claim 1, wherein A connecting seat (26) is arranged on the outer wall of one end of the shell (1), an oil inlet hole (27) is formed in the connecting seat (26) opposite to the silica gel ring (10) of the sealing plate (25).

5. A method of producing a fluid filter according to any one of claims 1 to 4, wherein The method comprises the following steps: S1: first, the second spring (18) is fixed by the outer thread ring (17) in the inner thread ring (16) inside the shell (1); S2: then, the back seat (3) is clamped on the second spring (18) inside the shell (1) through the spring clamp seat (15), then the communication pipe (4) is sleeved on the rear sealing seat (14), and then the front seat (2) is sleeved on the other end of the communication pipe (4) through the front sealing seat (13); S3: the sealing plate (25) is abutted and fitted on the silica gel pad (11) in the front seat (2), then the shell (1) is pressure-welded at one end of the sealing plate (25) by a machine, so that the sealing plate (25) is fixed inside the shell (1), and finally the connecting seat (26) is pressure-welded at one end of the shell (1) of the sealing plate (25), and the connecting seat (26) is abutted with the sealing plate (25).

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