Automatic alignment structure for oil return plug and oil return channel of filter element

Abstract

An automatic alignment structure of a filter element oil return plug and an oil return channel comprises a shell base and a filter element assembly, an oil outlet pipe and the oil return channel are arranged on the shell base, and a first inclined face is arranged at the upper end of the oil outlet pipe; the filter element assembly comprises a center pipe, the upper portion and the lower portion of the center pipe are connected with an upper end cover and a lower end cover respectively, a through hole and an oil return plug are arranged on the lower side of the lower end cover, an annular beam is fixedly arranged on the inner wall of the center pipe, and an axial guide strip is fixedly arranged on the inner wall of the center pipe and located on the lower side of the annular beam; a movable seat is arranged in the center pipe and located on the upper side of the oil outlet pipe, a second inclined face is arranged at the lower end of the movable seat and matched with the first inclined face, and an axial guide groove is formed in the side face of the movable seat. An independent valve of an oil return channel is omitted, the oil return plug is arranged on the filter element assembly, the structure is simplified, operation is easier and more convenient, meanwhile, an automatic alignment structure of the oil return plug and the oil return channel is arranged, and the filter element assembly is easier and more convenient to replace.

Description

Technical Field

[0001] This invention relates to the field of physics, and more particularly to filtration devices, especially an automatic alignment structure for the filter element return plug and return channel. Background Technology

[0002] The filtration device filters various oils through filter element assemblies. The oil return channel of the filtration device is usually located at the bottom of the housing. A valve is installed in the oil return channel. When replacing the filter element assembly, the valve of the oil return channel must be opened first to drain the oil accumulated in the housing through the oil return channel before the filter element assembly is replaced. This oil return channel structure is relatively complex, has high processing costs, and the operation of replacing the filter element assembly is not simple. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic alignment structure for the filter element return plug and return channel, which solves the technical problems of complex return channel structure and inconvenient operation of replacing filter element components in the prior art.

[0004] The present invention provides an automatic alignment structure for the return oil plug and return oil channel of a filter element, including a housing base and a filter element assembly. The housing base is provided with a centrally extending upward oil outlet pipe and an eccentric return oil channel. The upper end of the oil outlet pipe is provided with a first inclined surface.

[0005] The filter element assembly includes a central tube, which is sleeved on the outside of the oil outlet pipe. A filter medium is fixedly sleeved on the outside of the central tube. An upper end cap and a lower end cap are fixedly connected to the upper and lower ends of the central tube, respectively. A central through hole and an eccentric oil return plug are provided on the lower side of the lower end cap. The oil return plug cooperates with the oil return channel. An annular beam is fixedly provided on the inner wall of the central tube. An axial guide bar is fixedly provided on the inner wall of the central tube on the lower side of the annular beam.

[0006] The central tube is equipped with a movable seat, which is located above the oil outlet pipe. The lower end of the movable seat is provided with a second inclined surface, which cooperates with the first inclined surface. A connecting rod is coaxially fixed on the upper side of the movable seat. The diameter of the connecting rod is smaller than the diameter of the movable seat. An axial guide groove is provided on the side of the movable seat. The guide bar cooperates with the guide groove. The movable seat is located below the annular beam. A spring is provided between the movable seat and the annular beam. The spring is sleeved on the connecting rod and biases the movable seat downward.

[0007] Furthermore, a fixing block is provided on the lower end cover, and a fixing groove that cooperates with the fixing block is provided at the bottom of the central tube.

[0008] Furthermore, the guide groove is located at the lowest point of the second inclined surface of the movable seat.

[0009] Furthermore, a limiting block is provided at the upper end of the connecting rod, and the upper end of the movable seat passes through the ring beam and the limiting block overlaps the upper surface of the ring beam.

[0010] Compared with existing technologies, the advantages of this invention are positive and significant. This invention eliminates the separate valve for the return oil channel, instead installing a return oil plug on the filter element assembly, simplifying the structure, making operation easier, and reducing production costs. Furthermore, the automatic alignment structure between the return oil plug and the return oil channel makes installation and replacement of the filter element assembly even simpler. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the first installation process of an automatic alignment structure for the filter element return oil plug and return oil channel according to the present invention.

[0012] Figure 2 This is a schematic diagram of the second installation process of an automatic alignment structure for the filter element return oil plug and return oil channel according to the present invention.

[0013] Figure 3 This is a schematic diagram of the housing base in an automatic alignment structure for the filter element return oil plug and return oil channel according to the present invention.

[0014] Figure 4 This is a schematic diagram of the filter element assembly in the automatic alignment structure of the filter element return plug and return channel according to the present invention.

[0015] Figure 5 This is a schematic diagram of the movable seat in the automatic alignment structure of the filter element return oil plug and return oil channel according to the present invention.

[0016] Figure 6 This is a schematic diagram of the central tube in the automatic alignment structure of the filter element return oil plug and return oil channel according to the present invention.

[0017] Figure 7 This is a schematic diagram of the lower end cover in an automatic alignment structure for the filter element return oil plug and return oil channel according to the present invention.

[0018] Figure 8 This is a three-dimensional schematic diagram of the first installation process of an automatic alignment structure for a filter element return oil plug and return oil channel according to the present invention.

[0019] Figure 9 This is a three-dimensional schematic diagram of the second installation process of an automatic alignment structure for the filter element return oil plug and return oil channel according to the present invention.

[0020] Figure 10 This is a three-dimensional schematic diagram of the third installation process of an automatic alignment structure for the filter element return oil plug and return oil channel according to the present invention. Detailed Implementation

[0021] 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 of the present invention should be included within the scope of protection of the present invention. The use of directional terms such as up, down, front, back, left, right, center, 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.

[0022] like Figures 1-10 As shown, the present invention provides an automatic alignment structure for the filter element return oil plug and return oil channel, including a housing base 2 and a filter element assembly 3. The housing base 2 is provided with a centrally extending upward oil outlet pipe 4 and an eccentric return oil channel 5. The upper end of the oil outlet pipe 4 is provided with a first inclined surface 6.

[0023] The filter element assembly 3 includes a central tube 9, which is sleeved on the outside of the oil outlet pipe 4. The filter medium 12 is fixedly sleeved on the outside of the central tube 9. The upper end and the lower end of the central tube 9 are respectively fixedly connected to an upper end cap 7 and a lower end cap 8. The lower end cap 8 is provided with a central through hole 13 and an eccentric return oil plug 14 on its lower side. The return oil plug 14 cooperates with the return oil channel 5. An annular beam 19 is fixedly provided on the inner wall of the central tube 9. An axial guide bar 18 is fixedly provided on the inner wall of the central tube 9 on the lower side of the annular beam 19.

[0024] A movable seat 11 is provided in the central tube 9. The movable seat 11 is located above the oil outlet tube 4. A second inclined surface 15 is provided at the lower end of the movable seat 11. The second inclined surface 15 cooperates with the first inclined surface 6. A connecting rod 1 is coaxially fixed on the upper side of the movable seat 11. The diameter of the connecting rod 1 is smaller than the diameter of the movable seat 11. An axial guide groove 16 is provided on the side of the movable seat 11. The guide bar 18 cooperates with the guide groove 16. The movable seat 11 is located below the annular beam 19. A spring 10 is provided between the movable seat 11 and the annular beam 19. The spring 10 is sleeved on the connecting rod 1. The spring 10 biases the movable seat 11 downward.

[0025] Furthermore, a fixing block 21 is provided on the lower end cover 8, and a fixing groove 20 that cooperates with the fixing block 21 is provided at the bottom of the central tube 9.

[0026] Furthermore, the guide groove 16 is located at the lowest point of the second inclined surface 15 of the movable seat 11.

[0027] Furthermore, a limiting block 17 is provided at the upper end of the connecting rod 1, and the limiting block 17 overlaps the upper surface of the ring beam 19 after the upper end of the movable seat 11 passes through the ring beam 19.

[0028] Working principle of the invention:

[0029] During installation, hold the filter element assembly 3 by hand, place the central tube 9 onto the oil outlet pipe 4, and press down on the filter element assembly 3. In the first stage, the movable seat 11 self-aligns: under the interaction of the first inclined surface 6 at the upper end of the oil outlet pipe 4 and the second inclined surface 15 at the lower end of the movable seat 11, the movable seat 11 rotates adaptively until the second inclined surface 15 of the movable seat 11 is completely in contact with the first inclined surface 6 of the oil outlet pipe 4. Figure 8 , Figure 9 As shown, the movable seat 11 no longer rotates and the filter element assembly 3 can no longer move downwards; the second stage is the alignment of the return oil plug 14 and the return oil channel 5: rotate the filter element assembly 3 until you feel that the filter element assembly 3 has moved downwards significantly. At this time, as shown... Figure 1 , Figure 2 , Figure 10 As shown, the guide bar 18 on the inner wall of the central tube 9 aligns with the guide groove 16 of the movable seat 11 and enters the guide groove 16. The central tube 9 moves downward relative to the movable seat 11, compressing the spring 10. At the same time, the return oil plug 14 aligns with the return oil channel 5 and is inserted into the return oil channel 5. When the filter element assembly 3 is disassembled, the spring 10 pushes the movable seat 11 to reset, assisting in disassembly.

[0030] This invention eliminates the valve of the separate oil return channel 5 and instead sets an oil return plug 14 on the filter element assembly 3, which simplifies the structure, makes operation easier, and reduces production costs. At the same time, the automatic alignment structure between the oil return plug 14 and the oil return channel 5 makes the installation and replacement of the filter element assembly 3 easier.

Claims

1. An automatic alignment structure for the filter element return oil plug and return oil channel, characterized in that, It includes a housing base and a filter element assembly. The housing base is provided with a centrally extending upward oil outlet pipe and an eccentric oil return channel. The upper end of the oil outlet pipe is provided with a first inclined surface. The filter element assembly includes a central tube, which is sleeved on the outside of the oil outlet pipe. A filter medium is fixedly sleeved on the outside of the central tube. An upper end cap and a lower end cap are fixedly connected to the upper and lower ends of the central tube, respectively. A central through hole and an eccentric oil return plug are provided on the lower side of the lower end cap. The oil return plug cooperates with the oil return channel. An annular beam is fixedly provided on the inner wall of the central tube. An axial guide bar is fixedly provided on the inner wall of the central tube on the lower side of the annular beam. A movable seat is provided in the central tube, located above the oil outlet pipe. A second inclined surface is provided at the lower end of the movable seat, which cooperates with the first inclined surface. A connecting rod is coaxially fixed on the upper side of the movable seat, and the diameter of the connecting rod is smaller than the diameter of the movable seat. An axial guide groove is provided on the side of the movable seat, and the guide bar cooperates with the guide groove. The movable seat is located below the annular beam. A spring is provided between the movable seat and the annular beam, and the spring is sleeved on the connecting rod, causing the movable seat to be biased downward.

2. The automatic alignment structure for the filter element return oil plug and return oil channel according to claim 1, characterized in that, The lower end cover is provided with a fixing block, and the bottom of the central tube is provided with a fixing groove that cooperates with the fixing block.

3. The automatic alignment structure for the filter element return oil plug and return oil channel according to claim 1, characterized in that, The guide groove is located at the lowest point of the second inclined surface of the movable seat.

4. The automatic alignment structure for the filter element return oil plug and return oil channel according to claim 1, characterized in that, The upper end of the connecting rod is provided with a limiting block, and the upper end of the movable seat passes through the ring beam and the limiting block overlaps the upper surface of the ring beam.

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