Gearbox oil filter structure with filter element and end cover connected and sealed

Abstract

The utility model discloses a gearbox oil filter structure connected and sealed by a filter element and an end cover, which comprises a filter element, the filter element comprises a central framework, a hole enclosed by the central framework is used as an oil inlet hole, a filter layer is arranged outside the central framework in a surrounding manner, an upper end cover and a lower end cover are respectively arranged at two axial ends of the filter layer, an oil inlet is arranged on the upper end cover, and an oil outlet is arranged on the lower end cover. The oil inlet is downwards communicated with the oil inlet hole, the lower end cover is axially downwards integrally connected with a connecting part, and the circumferential outer surface of the connecting part is provided with an external thread used for being connected with a gearbox cylinder body. By the adoption of the structure, a maintenance end cover is omitted, and the connecting part is in threaded connection with the gearbox cylinder body. Due to the fact that the filter element does not need to be enclosed by the connecting part, the size of the filter element is greatly reduced compared with that of a maintenance end cover, the material consumption is reduced, the weight of the transmission oil filter is reduced, and the purposes of light weight of the transmission oil filter and light weight of an assisted whole vehicle are achieved. After the maintenance end cover is removed, the overall filter resistance of the filter is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile transmission oil filters. Background Art

[0002] Lightweighting vehicles can improve fuel efficiency, reduce fuel consumption, reduce emissions, improve acceleration and handling, extend the range of electric vehicles, reduce wear on tires, brakes, and suspension systems, and improve safety. Therefore, lightweighting has become a key trend in modern automotive design and manufacturing.

[0003] During operation, a motor vehicle's transmission fluid accumulates impurities, including metal particles from wear and tear, due to high temperatures, friction, and oxidation. Without a transmission oil filter, these impurities can exacerbate wear on moving parts and even cause transmission failure. Therefore, transmission oil filters are essential components in motor vehicles.

[0004] At present, the transmission oil filter in the prior art is as follows Figure 1 As shown, the filter element includes a filter element placed in a maintenance end cover 1, the filter element includes a filter layer 2, a central skeleton 3 is provided at the center of the filter layer 2, and a hole surrounded by the central skeleton 3 serves as an oil inlet; an upper end cover 4 and a lower end cover 5 are provided at the axial ends of the filter layer 2, and an oil inlet 6 is provided on the upper end cover 4, and the oil inlet 6 is downwardly connected to the oil inlet hole;

[0005] The gearbox cylinder body has a motion sub-cavity and an oil pan cavity, the oil pan cavity is provided with an oil pump, and the oil inlet 6 is connected to the oil outlet pipe of the oil pump. The circumferential outer surface of the filter layer 2 is connected to the motion sub-cavity.

[0006] Maintenance cover 1 encloses the filter element and has external threads 7 on its outer surface. This is used to assemble the cover to the transmission's cylinder block. During operation, the oil pump pumps lubricating oil (engine oil) from the oil pan into the oil inlet. The oil then flows radially through the filter layer from the oil inlet hole into the moving pair cavity, lubricating the moving pair. The oil then falls into the oil pan, forming a lubricating oil cycle.

[0007] The design goal of this utility model is to reduce the material usage of the transmission oil filter, reduce the weight of the transmission oil filter, achieve the lightweighting of the transmission oil filter, and contribute to the goal of lightweighting the entire vehicle. Utility Model Content

[0008] The purpose of the utility model is to provide a transmission oil filter structure with a filter element end cover connected and sealed, eliminating the maintenance end cover of the filter element, and connecting it to the cylinder body of the transmission through a connecting portion integrally extended from the lower end cover of the filter element, thereby reducing the weight of the transmission oil filter and reducing the filtration resistance of the transmission oil filter.

[0009] To achieve the above-mentioned purpose, the utility model provides a transmission oil filter structure with a filter element end cover connected and sealed, including a filter element, the filter element including a central skeleton, the hole surrounded by the central skeleton serving as an oil inlet, a filter layer arranged around the outside of the central skeleton, an upper end cover and a lower end cover respectively provided at the axial ends of the filter layer, an oil inlet provided on the upper end cover, the oil inlet communicating downwardly with the oil inlet, and a connecting portion integrally connected to the lower end cover axially downwardly, the circumferential outer surface of the connecting portion being provided with an external thread for connecting to a transmission cylinder body.

[0010] A lower annular sealing groove is provided on the circumferential outer surface of the connecting portion below the external thread, and a lower annular sealing ring is embedded in the lower annular sealing groove; an upper annular sealing groove is provided on the circumferential outer surface of the oil inlet, and an upper annular sealing ring is embedded in the upper annular sealing groove.

[0011] A bypass valve is provided at the bottom of the oil inlet hole, which is used to connect the gearbox motion sub-cavity and the oil inlet hole when the filter layer is blocked; the bypass valve includes a valve core, which is used to upwardly block the bottom opening of the center skeleton; the valve core is connected to a spring downward, the lower end of the spring presses on the bracket, and the bracket is fixedly connected to the lower end cover.

[0012] The utility model has the following advantages:

[0013] The structure of this utility model eliminates the need for a maintenance cover, with the connection section threadedly connected to the transmission cylinder body. Because the connection section no longer needs to enclose the filter element, its volume is significantly smaller than that of a maintenance cover, thereby reducing material usage and the weight of the transmission oil filter, achieving a lighter transmission oil filter and contributing to the goal of lighter vehicles overall.

[0014] Since there is no maintenance end cover surrounding the filter element, the filtered lubricating oil (i.e., transmission oil) no longer flows out from the axial end opening of the maintenance end cover, but can flow out freely on the entire circumferential surface of the filter element (to the moving auxiliary cavity), thereby reducing the filtration resistance of the transmission oil filter.

[0015] The lower annular sealing ring is used to ensure the seal between the transmission oil filter and the transmission cylinder body, and the upper annular sealing ring is used to ensure the seal between the oil outlet pipe and the oil inlet hole of the oil pump in the transmission to prevent unfiltered lubricating oil from entering the motion sub-cavity during normal operation.

[0016] The bypass valve has a simple structure and can automatically open when the filter layer is clogged, allowing unfiltered lubricating oil to enter the moving pair cavity, avoiding dry grinding of the moving pair due to lack of lubricating oil, and avoiding damage to the moving pair of the motor vehicle gearbox or shortening the service life of the moving pair due to dry grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a transmission oil filter in the prior art.

[0018] Figure 2 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0019] The up and down directions in the present invention refer to the up and down directions during the production and assembly of the filter element; when the present invention is installed on the transmission cylinder body, the axis direction of the present invention is basically the horizontal direction.

[0020] like Figure 2 As shown, a transmission oil filter structure with a filter element end cover connected and sealed in the utility model includes a filter element, which includes a central skeleton 8. The hole surrounded by the central skeleton 8 serves as an oil inlet hole. A filter layer 9 is provided around the outside of the central skeleton 8. An upper end cover 10 and a lower end cover 11 are respectively provided at the axial ends of the filter layer 9. An oil inlet 12 is provided on the upper end cover 10, and the oil inlet 12 is communicated with the oil inlet hole downwardly. The oil inlet 12 is communicated with the oil outlet pipe of the oil pump; the lower end cover 11 is integrally connected with a connecting portion 13 axially downwardly, and the circumferential outer surface of the connecting portion 13 is provided with an external thread 14 for connecting to the transmission cylinder body.

[0021] The structure of this utility model eliminates the need for a maintenance cover, with the connection portion 13 threadedly connected to the transmission cylinder. Because the connection portion 13 does not need to enclose the filter element, its volume is significantly smaller than that of the maintenance cover, thereby reducing material usage and the weight of the transmission oil filter, achieving a lighter transmission oil filter and contributing to the goal of lighter vehicles.

[0022] Since there is no maintenance end cover surrounding the filter element, the filtered lubricating oil (i.e., transmission oil) no longer flows out from the axial end opening of the maintenance end cover, but can flow out freely on the entire circumferential surface of the filter element (to the moving auxiliary cavity), thereby reducing the filtration resistance of the transmission oil filter.

[0023] The circumferential outer surface of the connecting portion 13 below the external thread 14 is provided with a lower annular sealing groove, in which a lower annular sealing ring 15 is embedded; the circumferential outer surface of the oil inlet 12 is provided with an upper annular sealing groove, in which an upper annular sealing ring 16 is embedded.

[0024] The lower annular sealing ring 15 is used to ensure the seal between the transmission oil filter and the transmission cylinder body, and the upper annular sealing ring 16 is used to ensure the seal between the oil outlet pipe and the oil inlet hole of the oil pump in the transmission to prevent unfiltered lubricating oil from entering the motion sub-cavity during normal operation.

[0025] A bypass valve is located at the bottom of the oil inlet. This valve is used to connect the transmission's motion sub-chamber and the oil inlet when filter layer 9 becomes clogged. The bypass valve includes a valve core 17, which is used to upwardly block the bottom opening of the central frame. A spring 18 is connected downwardly to valve core 17, the lower end of which presses against a bracket 19, which is fixedly connected to lower end cover 11. Bracket 19 is a hollow structure, so when the bypass valve is opened, lubricating oil can flow out of the utility model through bracket 19 and into the motion sub-chamber.

[0026] The bypass valve has a simple structure and can automatically open when the filter layer 9 is blocked, allowing unfiltered lubricating oil to enter the moving pair cavity, thereby avoiding dry grinding of the moving pair due to lack of lubricating oil, and avoiding damage to the moving pair of the motor vehicle gearbox or shortening the service life of the moving pair due to dry grinding.

[0027] During use, the present invention is threadedly connected to the transmission cylinder of a motor vehicle via the connection portion 13, with the axis of the present invention generally horizontal. The lower annular sealing ring 15 compresses the transmission cylinder, ensuring a tight seal. During normal operation, the oil pump pumps lubricating oil from the transmission oil sump to the oil inlet 12. After entering the oil inlet, the lubricating oil radially passes through the filter layer 9, where impurities in the lubricating oil are trapped. The filtered lubricating oil then flows radially outward from the filter layer 9 into the gearbox's moving element chamber, lubricating the moving elements and preventing dry wear. After passing through the moving element chamber, the lubricating oil falls into the oil sump, completing the lubricating oil circulation process. If the filter layer 9 becomes clogged, the filtration resistance increases significantly, causing the oil pressure in the oil inlet chamber to rise. Under the action of the oil pressure, the valve core 17 compresses the spring 18 and moves away from the bottom opening of the central frame, releasing the oil inlet bottom portion blocked by the valve core 17. The lubricating oil in the oil inlet can then flow downward through the bypass valve and into the moving element chamber, thus preventing dry wear of the moving elements. The most significant feature of the present invention is that the maintenance end cover is eliminated and a connecting portion 13 is added. Since the volume of the connecting portion 13 is substantially smaller than that of the maintenance end cover, the transmission oil filter is lightweight.

[0028] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A transmission oil filter structure with a filter element and end caps connected and sealed, comprising a filter element, the filter element comprising a central frame, a hole enclosed by the central frame serving as an oil inlet, a filter layer disposed around the central frame, an upper end cap and a lower end cap disposed at each axial end of the filter layer, an oil inlet disposed on the upper end cap, the oil inlet downwardly communicating with the oil inlet, and characterized by: The lower end cover is integrally connected with a connecting portion axially downward, and a circumferential outer surface of the connecting portion is provided with an external thread for connecting with a transmission cylinder body.

2. The transmission oil filter structure with a filter element end cover connected and sealed according to claim 1, characterized in that: A lower annular sealing groove is provided on the circumferential outer surface of the connecting portion below the external thread, and a lower annular sealing ring is embedded in the lower annular sealing groove; an upper annular sealing groove is provided on the circumferential outer surface of the oil inlet, and an upper annular sealing ring is embedded in the upper annular sealing groove.

3. The transmission oil filter structure with a filter element end cover connected and sealed according to claim 1, characterized in that: A bypass valve is provided at the bottom of the oil inlet hole, which is used to connect the gearbox motion sub-cavity and the oil inlet hole when the filter layer is blocked; the bypass valve includes a valve core, which is used to upwardly block the bottom opening of the center skeleton; the valve core is connected to a spring downward, the lower end of the spring presses on the bracket, and the bracket is fixedly connected to the lower end cover.

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