Lubricating oil filter element and manufacturing method thereof

Abstract

A lubricating oil filter element, characterized in that it includes a connector, an end cover, a filter screen, a first nest, a first insert, a second nest and a second insert. The filter screen is cylindrical, with one end arranged on the first inner cavity wall of the aforementioned connector, and the other end arranged on the second inner cavity wall of the aforementioned end cover; the first insert is embedded in the aforementioned first nest inner cavity and the first nest is stretched open so that one end of the filter screen is fastened to the first inner cavity wall of the connector; the first insert has a central through hole and is connected to the oil outlet of the connector; the second insert is embedded in the aforementioned second nest inner cavity and the second nest is stretched open so that the other end of the filter screen is fastened to the second inner cavity wall of the end cover. The present invention also discloses a method for making a lubricating oil filter element. One end of the filter screen is fastened and assembled by the first insert and the first nest, and the other end is assembled by the second insert and the second nest. Both ends are firmly connected and not easy to disengage. The connection strength is much greater than that of the welding method; and the overall assembly is quick.

Description

Technical Field

[0001] The invention relates to a filter element and also to a method for manufacturing the filter element. The filter element can be used for filtering lubricating oil or lubricating grease. Background Art

[0002] As the oil source of the lubrication device, the lubrication pump can provide lubricating oil or grease at a regular interval and is widely used in the field of mechanical equipment. Its basic structure includes a motor, a pump body and an oil tank. The oil inlet end of the oil tank is often provided with a lubricating oil filter to filter and remove impurities from the lubricating medium entering the oil tank. The basic structure of the current lubricating oil filter includes a filter housing and a filter element arranged in the filter housing. The filter element generally consists of a frame and a filter screen arranged on the frame. The filter screen is generally connected to the frame by welding or filter screen insert injection molding. During the long-term use of the filter element with this structure, impurities accumulate on the filter screen to a certain extent, forming a large pressure difference, causing the weld to eventually detach and the filter element to fail. For related literature, please refer to the Chinese utility model patent "Compressor lubricating oil easily removable and cleanable filter" with patent number ZL201220511802.5 (authorization announcement number CN202860234); you can also refer to the Chinese utility model patent "A new energy-saving automatic lubrication pump" with patent number ZL202121219628.2 (authorization announcement number CN218062646U).

[0003] There is also a method of connecting by bonding, with reference to the Chinese utility model patent "Oil Filter" with patent number ZL200920103490.2 (authorization announcement number CN201454201U), which also has the disadvantage of loose connection. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a lubricating oil filter element with a firmly connected filter screen in view of the above-mentioned technical status quo.

[0005] The second technical problem to be solved by the present invention is to provide a method for manufacturing a lubricating oil filter element with a firmly connected filter screen in response to the above-mentioned technical status quo.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a lubricating oil filter element, characterized in that it includes

[0007] A connector, which is axially hollow to form an oil outlet and has a first inner cavity wall;

[0008] an end cap having a second inner cavity wall;

[0009] The filter screen is cylindrical, one end of which is arranged on the first inner cavity wall of the aforementioned connector, and the other end of which is arranged on the second inner cavity wall of the aforementioned end cover;

[0010] A first nesting, which is radially elastic and is disposed on the inner wall of one end of the aforementioned filter screen;

[0011] A first insert is embedded in the first nested inner cavity and expands the first nested cavity so that one end of the filter screen is fastened to the first inner cavity wall of the connector; the first insert has a central through hole and is connected to the oil outlet of the connector;

[0012] A second nest, which is radially elastic and is disposed on the inner wall of the other end of the filter screen; and

[0013] The second embedded block is embedded in the aforementioned second nested inner cavity and expands the second nested cavity so that the other end of the filter screen is fastened to the second inner cavity wall of the end cover.

[0014] Preferably, the inner diameter of the first nesting gradually decreases from top to bottom to form an inverted frustum, and correspondingly, the outer diameter of the first insert gradually decreases from top to bottom to form a frustum.

[0015] Preferably, the inner diameter of the second nesting gradually expands from top to bottom to form a frustum, and correspondingly, the outer diameter of the second embedded block gradually expands from top to bottom to form an inverted frustum.

[0016] Preferably, the first nest has a first notch and has radial elasticity, and the second nest has a second notch and has radial elasticity.

[0017] The filter screen comprises a skeleton filter screen and a peripheral filter screen arranged outside the skeleton filter screen, the filter hole diameter of the skeleton filter screen is larger than the filter hole diameter of the peripheral filter screen, and the skeleton filter screen is used to provide the overall strength of the filter screen.

[0018] The technical solution adopted by the present invention to solve the above second technical problem is: a method for manufacturing a lubricating oil filter element, comprising the following steps:

[0019] Insert the first nest and the first insert into one end of the filter in advance, and place one end of the filter on the first inner cavity wall of the connector. When external force acts on the first insert, the first insert moves and causes the first nest to open, thereby fastening one end of the filter to the connector. Then, insert the second nest and the second insert into the other end of the filter, and place the other end of the filter on the second inner cavity wall of the end cover. When external force acts on the second insert, the second insert moves and causes the second nest to open, thereby fastening the other end of the filter to the end cover, thereby completing the assembly of the filter element.

[0020] The external force adopts a cylinder, which includes a cylinder body and a push rod that can be extended and retracted relative to the cylinder body. The push rod can act on the first embedded block and the second embedded block.

[0021] Compared with the prior art, the advantages of the present invention are: one end of the filter is fastened and assembled by the first embedding block and the first nesting, and the other end is assembled by the second embedding block and the second nesting. Both ends are firmly connected and not easy to come off. The connection strength is much greater than that of the welding method; moreover, the overall assembly is quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an enlarged schematic diagram of the lubricating oil filter.

[0023] Figure 2 This is a schematic diagram of the structure of the lubricating oil filter from another perspective.

[0024] Figure 3 for Figure 1 Exploded diagram of .

[0025] Figure 4 for Figure 3 Exploded view of the filter element.

[0026] Figure 5 for Figure 4 Exploded view of the middle filter.

[0027] Figure 6 A cross-sectional view of a lubricating oil filter.

[0028] Figure 7 This is a state diagram in which the first nest and the first insert are pre-stuck into one end of the filter.

[0029] Figure 8 for Figure 7 A three-dimensional cross-sectional view of .

[0030] Fig. 9 This is a state diagram in which the second nest and the second insert are pre-stuck into the other end of the filter.

[0031] Fig.10 for Fig. 9 A three-dimensional cross-sectional view of .

[0032] Fig.11 Schematic diagram of the cylinder structure as an external force. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2 As shown, the lubricating oil filter in this embodiment includes a filter housing 1 and a filter element 10 arranged in the filter housing 1. The filter housing 1 has an oil inlet port 11 and an oil outlet port.

[0035] like Figure 3 , Figure 4 and Figure 6As shown, the filter element 10 in this embodiment includes a connector 8, an end cover 2, a filter screen 5, a first nest 7, a first insert 6, a second nest 3 and a second insert 4.

[0036] The connector 8 is axially hollow to form an oil outlet 81 and has a first inner cavity wall; the outer end of the connector 8 has an outer thread 82 adapted to the inner thread of the oil outlet port of the filter housing 1. The end cover 2 has a second inner cavity wall;

[0037] The filter screen 5 is cylindrical, one end of which is arranged on the first inner cavity wall of the connector 8, and the other end of which is arranged on the second inner cavity wall of the end cover 2; Figure 5 As shown, the filter screen 5 in this embodiment includes a skeleton filter screen 51 and a peripheral filter screen 52 arranged outside the skeleton filter screen 51 , and the filter hole diameter of the skeleton filter screen 51 is larger than the filter hole diameter of the peripheral filter screen 52 .

[0038] The first nest 7 is radially elastic and is placed on the inner wall of one end of the filter 5; the first embedded block 6 is embedded in the inner cavity of the first nest 7 and the first nest 7 is opened to fasten one end of the filter 5 to the first inner cavity wall of the connector 8; the first embedded block 6 has a central through hole and is connected to the oil outlet 81 of the connector 8.

[0039] The second nest 3 is radially elastic and is placed on the inner wall of the other end of the filter 5 ; the second insert 4 is embedded in the inner cavity of the second nest 3 and opens the second nest 3 so that the other end of the filter 5 is fastened to the second inner cavity wall of the end cover 2 .

[0040] The inner diameter of the first nest 7 gradually decreases from top to bottom and presents an inverted frustum shape. Correspondingly, the outer diameter of the first insert 6 gradually decreases from top to bottom and presents a frustum shape. The inner diameter of the second nest 3 gradually increases from top to bottom and presents a frustum shape. Correspondingly, the outer diameter of the second insert 4 gradually increases from top to bottom and presents an inverted frustum shape. The first nest 7 has a first notch 71 and has radial elasticity. The second nest 3 has a second notch 31 and has radial elasticity. Both the first notch 71 and the second notch 31 are inclined.

[0041] The method for making a filter element comprises the following steps:

[0042] like Figure 7 and Figure 8 As shown, the first nest 7 and the first insert 6 are inserted into one end of the filter screen 5 in advance, and one end of the filter screen 5 is placed on the first inner cavity wall of the connector 8. External force acts on the first insert 6, the first insert 6 moves and opens the first nest 7, thereby fastening one end of the filter screen 5 to the connector 8; then, as shown in FIG. Fig. 9 and Fig.10As shown, the second nest 3 and the second insert 4 are inserted into the other end of the filter screen 5, and the other end of the filter screen 5 is placed on the second inner cavity wall of the end cover 2. External force acts on the second insert 4, the second insert 4 moves and opens the second nest 3, and then the other end of the filter screen 5 is fastened to the end cover 2 to complete the assembly of the filter element 10. The filter element 10 is connected to the filter housing 1 by threads.

[0043] Combination Fig.11 As shown, the external force is applied by a cylinder 1a, which includes a cylinder body 11a and a push rod 12a which can be extended and retracted relative to the cylinder body 11a, and the push rod 12a can act on the first insert block 6 and the second insert block 4.

[0044] One end of the filter is fastened and assembled by the first insert and the first nest, and the other end is assembled by the second insert and the second nest. Both ends are firmly connected and not easy to be detached. The connection strength is much greater than that of welding. Moreover, the overall assembly is quick.

Claims

1. A lubricating oil filter element, characterized in that include A connector (8) which is axially hollow to form an oil outlet and has a first inner cavity wall; An end cover (2) having a second inner cavity wall; The filter screen (5) is cylindrical, one end of which is arranged on the first inner cavity wall of the aforementioned connector (8), and the other end of which is arranged on the second inner cavity wall of the aforementioned end cover (2); A first nest (7) having radial elasticity and disposed on the inner wall of one end of the filter screen (5); A first insert (6) is embedded in the inner cavity of the first nest (7) and expands the first nest (7) so that one end of the filter screen (5) is fastened to the first inner cavity wall of the connector (8); the first insert (6) has a central through hole and is connected to the oil outlet of the connector (8); A second nest (3) having radial elasticity and disposed on the inner wall of the other end of the aforementioned filter screen (5); as well as A second insert (4) is embedded in the inner cavity of the second nest (3) and opens the second nest (3) so that the other end of the filter screen (5) is fastened to the second inner cavity wall of the end cover (2); The inner diameter of the first nest (7) gradually decreases from top to bottom and presents an inverted frustum shape, and correspondingly, the outer diameter of the first insert (6) gradually decreases from top to bottom and presents a frustum shape; The inner diameter of the second nest (3) gradually expands from top to bottom to present a frustum shape, and correspondingly, the outer diameter of the second insert (4) gradually expands from top to bottom to present an inverted frustum shape.

2. The lubricating oil filter element according to claim 1, characterized in that The first nest (7) has a first notch (71) and has radial elasticity.

3. The lubricating oil filter element according to claim 1, characterized in that The second nest (3) has a second notch (31) and has radial elasticity.

4. The lubricating oil filter element according to claim 1, characterized in that The filter screen (5) comprises a skeleton filter screen (51) and a peripheral filter screen (52) arranged outside the skeleton filter screen (51), and the filter hole diameter of the skeleton filter screen (51) is larger than the filter hole diameter of the peripheral filter screen (52).

5. A method for manufacturing a lubricating oil filter element according to any one of claims 1 to 4, comprising the following steps: The first nest (7) and the first insert (6) are inserted into one end of the filter screen (5) in advance, and one end of the filter screen (5) is placed on the first inner cavity wall of the connector (8). External force acts on the first insert (6), the first insert (6) moves and causes the first nest (7) to open, thereby fastening one end of the filter screen (5) to the connector (8); then, the second nest (3) and the second insert (4) are inserted into the other end of the filter screen (5), and the other end of the filter screen (5) is placed on the second inner cavity wall of the end cover (2). External force acts on the second insert (4), the second insert (4) moves and causes the second nest (3) to open, thereby fastening the other end of the filter screen (5) to the end cover (2), thereby completing the assembly of the filter element.

6. The method for manufacturing a lubricating oil filter element according to claim 5, characterized in that The external force is provided by a cylinder (1a), which comprises a cylinder body (11a) and a push rod (12a) which can be extended and retracted relative to the cylinder body (11a), and the push rod (12a) can act on the aforementioned first insert block (6) and the second insert block (4).

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