Retarder lubricating oil filtering device, retarder and new energy vehicle

Abstract

The application belongs to the technical field of transmission devices, and particularly relates to a reducer lubricating oil filtering device, a reducer and a new energy vehicle. The reducer lubricating oil filtering device comprises a first filter screen, a second filter screen, a support frame and a cover body. The first filter screen is in a cylindrical shape, and the second filter screen is located in the first filter screen. One end of the support frame is provided with an oil outlet for lubricating oil filtered by the second filter screen, and the other end is connected with the cover body to be closed. The oil inlet side of the second filter screen is surrounded by the oil outlet side of the first filter screen, and the oil outlet is only communicated with the oil outlet side of the second filter screen. The filtering precision of the first filter screen is less than that of the second filter screen. The first filter screen is connected with the support frame, and at least part of the second filter screen is connected with the inner wall of the first filter screen. The application can improve the filtering precision of the reducer lubricating oil and avoid the blockage of the filter screen.

Description

Technical Field

[0001] This invention relates to the field of transmission technology, and in particular to a reducer lubricating oil filtration device, a reducer, and a new energy vehicle. Background Technology

[0002] The vehicle's reducer is a crucial transmission component. To ensure proper transmission, the lubricating oil inside the reducer needs to maintain a high level of cleanliness. However, after a period of operation, a large amount of impurities accumulate within the reducer housing. These impurities negatively impact the operation of the gearbox bearings, the sealing of the oil seal lips, and the contact of the gear teeth. As the cleanliness of the lubricating oil gradually deteriorates during reducer use, frequent replacement with lubricating oil that no longer meets cleanliness requirements is often necessary to maintain optimal transmission performance. This wastes resources, and the discarded lubricating oil also pollutes the environment. To address this, existing technologies have proposed installing magnets on the reducer housing to attract iron filings from the lubricating oil. For example, patent CN107939949A features a protrusion on the main reducer housing, into which a magnet is installed. However, due to the limited magnetism of the magnet, when a large amount of impurities are attracted to the magnet's surface, it loses its ability to further clean the lubricating oil. Patent CN213599044U proposes using a base shell and a sealing cap to form a filter chamber, with the filter element placed inside. Lubricating oil flows out after being filtered by the filter element within the chamber. However, the size of impurities in the lubricating oil varies. If a filter element with high filtration precision is used, it will quickly become clogged by larger impurities; if a filter element with low filtration precision is used, it will be unable to filter smaller impurities. Furthermore, the lubricating oil can only flow in from one side of the base shell, thus limiting the oil flow rate and reducing filtration efficiency. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a reducer lubricating oil filtration device, a reducer, and a new energy vehicle to solve the technical problem that existing reducers have low filtration efficiency and cannot maintain high filtration accuracy for a long time.

[0004] The technical solution adopted in this invention is:

[0005] In a first aspect, the present invention provides a speed reducer lubricating oil filtration device, comprising: a first filter screen, a second filter screen, a support frame and a cover, wherein the first filter screen is formed into a cylindrical shape, the second filter screen is located inside the first filter screen, one end of the support frame is provided with an oil outlet for the lubricating oil filtered by the second filter screen to flow out, and the other end is connected to the cover and then closed.

[0006] The oil inlet side of the second filter screen is surrounded by the oil outlet side of the first filter screen, and the oil outlet is only connected to the oil outlet side of the second filter screen.

[0007] The filtration accuracy of the first filter screen is less than that of the second filter screen;

[0008] The first filter screen is connected to the support frame, and at least a portion of the second filter screen is connected to the inner wall of the first filter screen.

[0009] Preferably, the second filter screen is folded to form multiple filter surfaces that are connected end to end in sequence.

[0010] Preferably, the junction of two adjacent filter surfaces abuts against the first filter screen, the fold line formed by the junction of the two adjacent filter surfaces is parallel to the axis of the oil outlet, and the second filter screen is folded and surrounds the axis of the oil outlet to form a circle.

[0011] Preferably, the end of the filter surface facing the first filter screen is bonded to the oil outlet side of the first filter screen and / or the side of the first filter screen facing the support frame is bonded to the support frame.

[0012] Preferably, the first filter screen is a folded filter screen, the direction of the fold line of the first filter screen is perpendicular to the axial direction of the oil outlet, at least a portion of the fold lines of the second filter screen are perpendicular to the axial direction of the oil outlet, the support frame is a support frame that can extend and retract along the axial direction of the oil outlet, the two ends of the first filter screen and the second filter screen are respectively connected to the two ends of the support frame, and the cross-sectional thickness of the second filter screen gradually decreases from the cover towards the oil outlet.

[0013] Preferably, the support frame includes a nut, a bolt, a first component, and a second component. The cover is connected to the first component, and the oil outlet is disposed on the second component. The first component and the second component are connected in a manner that allows them to move relative to each other along the axis of the oil outlet. The bolt is disposed along the axis of the oil outlet and is located outside the first filter screen. The nut is connected to the first component, and the bolt is connected to the second component. The bolt is threadedly connected to the nut. When the bolt rotates, it drives the second component to move relative to the first component along the axis of the oil outlet, thereby causing the support frame to extend and retract.

[0014] Preferably, the broken line on the filter surface near the oil outlet axis is parallel to the oil outlet axis, and the broken line away from the oil outlet axis gradually approaches the oil outlet axis from the cover towards the oil outlet.

[0015] In a second aspect, the present invention provides a speed reducer, including the speed reducer lubricating oil filtering device described in the first aspect, wherein the speed reducer lubricating oil filtering device is disposed on the speed reducer lubricating oil passage.

[0016] Preferably, the device further includes a reducer oil plug, which comprises a body and a spherical magnetic component. The body is provided with a connection structure for detachable connection with the reducer housing. A shielding portion is provided at one end of the body facing the interior of the reducer. The center of mass of the magnetic component is the center of the sphere of the magnetic component. The magnetic component is rotatably connected to the shielding portion, and its axis of rotation passes through the center of the sphere of the magnetic component and is perpendicular to the direction of gravity. The magnetic component is divided into a first part and a second part by a first reference plane. The first part is shielded by the shielding portion. The first reference plane is a plane that passes through the axis of rotation and has an angle of 8 degrees to 20 degrees with the horizontal plane.

[0017] Thirdly, the present invention provides a new energy vehicle, including the reducer lubricating oil filtering device described in the first aspect, or the reducer described in the second aspect.

[0018] Beneficial Effects: The reducer lubricating oil filtration device, reducer, and new energy vehicle of the present invention first use a first filter screen with lower filtration precision to perform coarse filtration of the reducer lubricating oil, and then use a second filter screen with higher filtration precision to perform a fine filtration of the lubricating oil filtered by the first filter screen. Because the reducer lubricating oil filtration device of the present invention adopts a method of initial filtration followed by fine filtration, larger foreign objects can be filtered out during the coarse filtration process, preventing foreign objects from clogging the second filter screen with higher precision, while the second filter screen can provide overall filtration precision. In this embodiment, by connecting the first filter screen to the support frame and connecting at least a portion of the second filter screen to the inner wall of the first filter screen, the two filter screens have a certain spacing space and are effectively supported, stably maintaining the expected shape, thereby ensuring that the filtration device always maintains a good filtration effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the reducer lubricating oil filtration device of the present invention;

[0021] Figure 2 This is a longitudinal sectional view of the reducer lubricating oil filtration device of the present invention;

[0022] Figure 3 This is an exploded view of the reducer lubricating oil filtration device of the present invention;

[0023] Figure 4 This is a cross-sectional view of the reducer lubricating oil filtration device of the present invention;

[0024] Figure 5 This is a three-dimensional structural schematic diagram of a second filter screen according to one embodiment of the present invention;

[0025] Figure 6 This is a three-dimensional structural diagram of a first or second filter screen according to one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the second filter screen with uneven thickness distribution in the present invention;

[0027] Figure 8 This is a schematic diagram of the transmission oil plug using a rotatable spherical magnetic component according to the present invention;

[0028] Parts and their numbers in the diagram:

[0029] Cover 1, second filter screen 2, filter surface 21, fold line 22, first filter screen 3, support frame 4, annular support bar 41, vertical support bar 42, oil outlet 43, seal 5, main body 111, shielding part 30, first reference plane 40, first part 51, second part 52, horizontal plane 70. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, the element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Where there is no conflict, embodiments of the present invention and the various features thereof can be combined with each other, all of which are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 and Figure 3 As shown, this embodiment provides a speed reducer lubricating oil filtration device, including: a first filter screen 3, a second filter screen 2, a support frame 4 and a cover 1. One end of the support frame 4 is provided with an oil outlet 43 for the lubricating oil after being filtered by the second filter screen 2 to flow out, and the other end is connected to the cover 1 and then closed.

[0033] like Figure 2 As shown, the reducer lubricating oil filter device of this embodiment has two ends. One end is provided with a cover 1, which is connected to the support frame 4 to close the end. The other end is provided with an oil outlet 43. In this way, the lubricating oil filtered by the first filter screen 3 and the second filter screen 2 can only flow to the reducer components from the oil outlet 43 at the other end. The support frame 4 in this embodiment mainly serves to support and install other components, so that the reducer lubricating oil filter device can form and maintain the expected shape after all components are installed.

[0034] like Figure 4As shown, the first filter screen 3 is formed into a cylindrical shape, and the second filter screen 2 is located inside the first filter screen 3. The oil inlet side of the second filter screen 2 is surrounded by the oil outlet side of the first filter screen 3, and the oil outlet 43 is only connected to the oil outlet side of the second filter screen 2. Since the first filter screen 3 is formed into a cylindrical shape, after the reducer lubricating oil filter device in this embodiment is placed in the reducer lubricating oil passage, the lubricating oil in the reducer passage can flow from the outside of the cylindrical first filter screen 3 into the inside of the first filter screen 3 at the same time. In the process of the lubricating oil flowing from the outside of the first filter screen 3 into the inside of the first filter screen 3 at the same time, the first filter screen 3 performs the first filtration of the lubricating oil. Therefore, the lubricating oil flowing into the inside of the first filter screen 3 is the lubricating oil that has been preliminarily filtered by the first filter screen 3.

[0035] The side from which the lubricating oil flows out of the first filter screen 3 after filtration is the oil outlet side of the first filter screen 3. The side from which lubricating oil flows into the second filter screen 2 from the outside is the oil inlet side of the second filter screen 2, and the side from which the lubricating oil flows out of the second filter screen 2 after filtration is the oil outlet side of the second filter screen 2.

[0036] Because the oil inlet side of the second filter screen 2 is surrounded by the oil outlet side of the first filter screen 3, the lubricating oil filtered by the first filter screen 3 surrounds the second filter screen 2 and can flow to the second filter screen 2 from all directions. As this lubricating oil enters from the oil inlet side and flows out from the oil outlet side of the second filter screen 2, the second filter screen 2 performs a second filtration of the lubricating oil. Since the oil outlet 43 is only connected to the oil outlet side of the second filter screen 2, the lubricating oil flowing to the reducer components through the oil outlet 43 is lubricating oil that has undergone secondary filtration by the second filter screen 2, thus fully ensuring the filtration effect of the reducer lubricating oil.

[0037] In this embodiment, the filtration accuracy of the first filter screen 3 is less than that of the second filter screen 2. The first filter screen 3 is a coarse filter, and the second filter screen 2 is a fine filter.

[0038] In this embodiment, the lubricating oil enters the first filter screen 3 from the outside of the first filter screen, then enters the interior of the first filter screen 3, and finally flows out of the oil outlet 43 after being filtered by the second filter screen 2. That is, the lubricating oil first passes through the first filter screen 3 and then through the second filter screen 2. Since the filtration accuracy of the first filter screen 3 is less than that of the second filter screen 2 in the reducer lubricating oil filtration device of this embodiment, the first filter screen 3 first performs coarse filtration on the lubricating oil, and the lubricating oil that has been filtered out of larger foreign objects then passes through the second filter screen 2. This can prevent larger foreign objects in the lubricating oil from clogging the second filter screen 2. The second filter screen 2 uses a higher precision filter screen, which can both prevent the filter screen from clogging and achieve higher precision lubricating oil filtration, so that the first filter screen plays the role of supporting and protecting the second filter screen. The first filter screen can be a filter screen with a mesh size of 18 / 2.54 and a pore size of 0.96mm, while the second filter screen can be a stainless steel filter screen with a mesh size of 150 and a filtration accuracy of 100μm.

[0039] In this embodiment, the first filter screen 3 is connected to the bracket, and at least a portion of the second filter screen 2 is connected to the inner wall of the first filter screen 3. After the first filter screen 3 is connected to the bracket, the support frame 4 supports the first filter screen, keeping it in a cylindrical shape. Since the first filter screen can maintain its desired shape, when at least a portion of the second filter screen 2 is connected to the inner wall of the first filter screen 3, the second filter screen can be supported by the first filter screen and form and maintain its desired shape stably for a long time without the need for additional support structures.

[0040] like Figure 5 As shown, in this embodiment, the second filter screen 2 is folded to form a plurality of filter surfaces 21 connected end to end. After the second filter screen is folded, each filter surface 21 can filter the lubricating oil in the reducer. The area of ​​the filter surface 21 used for filtering lubricating oil in the second filter screen 2 is multiplied, thereby further improving the filtration efficiency of the filter device.

[0041] In this embodiment, the junction of two adjacent filter surfaces 21 abuts against the first filter screen 3, and the fold line 22 formed by the junction of the two adjacent filter surfaces 21 is parallel to the axis of the oil outlet 43. The second filter screen 2 is folded and forms a circle around the axis of the oil outlet 43. In this embodiment, the fold line 22 of the second filter screen 2 is parallel to the axis of the oil outlet 43, and the second filter screen 2 is folded and forms a circle around the axis of the oil outlet 43. After being filtered by the second filter screen, the lubricating oil can flow quickly from all positions and directions of the second filter screen towards the oil outlet 43, thereby reducing the resistance to the flow of lubricating oil and allowing the lubricating oil to pass through the second filter screen 2 more quickly.

[0042] In this embodiment, the end of the filter surface 21 facing the first filter screen is bonded to the oil outlet side of the first filter screen. The second filter screen 2 can be bonded to the first filter screen 3 at the fold line 22. This embodiment adopts the aforementioned connection method of bonding at the folded position after folding. This allows the second filter screen 2 to maintain its desired shape with the support of the first filter screen 3, while also leaving a certain space between each filter surface 21 and the first filter screen 3, allowing the lubricating oil between the first filter screen 3 and the second filter screen 2 to flow more smoothly, thereby further improving filtration efficiency.

[0043] In this embodiment, the first filter screen 3 is bonded to the support frame 4 on the side facing the support frame 4. This embodiment uses bonding to connect the first filter screen 3 to the support frame 4, which is not only low-cost but also convenient.

[0044] The mounting components in this embodiment include a filter cover and a support frame 4, located at opposite ends of the first filter screen 3 and the second filter screen 2, respectively. The first filter screen 3 and the second filter screen 2 are bonded to the filter cover and the support frame 4 with adhesive. After bonding, the lubricating oil must pass through the coarse filter screen and the pleated fine filter screen, and then flow to the reducer components through the through hole in the middle of the support frame 4. After being filtered by the coarse filter screen and the pleated fine filter screen, the clean lubricating oil flows to the reducer components through the hole in the middle of the support frame 4.

[0045] like Figure 1 and Figure 2 As shown, in this embodiment, a sealing element 5 is provided on the outer wall of the end of the support frame 4 where the oil outlet 43 is located. The sealing element 5 can be an O-ring. In this embodiment, the sealing element 5 serves a sealing function, which can effectively prevent unfiltered lubricating oil from flowing out.

[0046] In this embodiment, the support frame 4 includes annular support bars 41 and several vertical support bars 42. The vertical support bars 42 extend from one end of the support frame 4 with an oil outlet 43 to the end of the support frame 4 connected to the cover 1. The annular support bars 41 and the vertical support bars 42 are intersecting and connected. The annular support bars 41 are arranged along the circumferential direction of the reducer lubricating oil filter device. The intersecting connection of the annular support bars 41 and the vertical support bars 42 gives the support frame 4 good rigidity, which can support the first filter screen 3 and better maintain its cylindrical shape. Lubricating oil can also flow into the first filter screen 3 from the cavity formed by the annular support bars 41 and the vertical support bars 42.

[0047] In this embodiment, since the oil outlet 43 is located at one end of the second filter screen 2, the distance between different parts of the second filter screen 2 and the oil outlet 43 varies. If the flow rate of lubricating oil filtered by the second filter screen 2 near the oil outlet 43 is larger, while the flow rate of lubricating oil filtered by the second filter screen 2 near the oil outlet 43 is smaller, the continuity of the lubricating oil is disrupted during the process of the lubricating oil flowing from the second filter screen 2 to the oil outlet 43, which can easily lead to cavitation.

[0048] In this embodiment, the fold line 22 on the filter surface 21 near the axis of the oil outlet 43 is parallel to the axis of the oil outlet 43, while the fold line 22 away from the axis of the oil outlet 43 gradually approaches the axis of the oil outlet 43 from the cover 1 towards the oil outlet 43. With this arrangement, the fold lines 22 around each filter surface 21 in the second filter screen 2 are inclined towards the central axis of the filter device, so the filter surface area of ​​each filter surface 21 gradually decreases from the cover 1 towards the oil outlet 43. That is, the filter surface area of ​​the second filter screen 2 away from the oil outlet 43 is large, and the filter surface area of ​​the second filter screen 2 near the oil outlet 43 is small. Therefore, the flow rate of lubricating oil filtered at the location of the second filter screen 2 away from the oil outlet 43 is greater than the flow rate of lubricating oil filtered at the location of the second filter screen 2 near the oil outlet 43. The lubricating oil filtered at the location of the second filter screen 2 away from the oil outlet 43 can promptly replenish the flow rate of lubricating oil near the outlet, effectively preventing the generation of cavitation bubbles in the filtered lubricating oil.

[0049] Different speed reducers have different filtration requirements for the lubricating oil circulation system, and therefore the length of the filtration device used will also vary. For example... Figure 6 As shown, this embodiment also provides a reducer lubricating oil filtering device that can adapt to different length requirements. In this embodiment, the first filter screen 3 is a folded filter screen, the direction of the fold line 22 of the first filter screen 3 is perpendicular to the axial direction of the oil outlet 43, at least a portion of the fold line 22 of the second filter screen 2 is perpendicular to the axial direction of the oil outlet 43, the support frame 4 is a support frame 4 that can extend and retract along the axial direction of the oil outlet 43, and the two ends of the first filter screen 3 and the second filter screen 2 are respectively connected to the two ends of the support frame 4, as shown. Figure 7 As shown, the cross-sectional thickness of the second filter screen 2 gradually decreases from the cover 1 toward the oil outlet 43.

[0050] In this embodiment, both the first filter screen 3 and the second filter screen 2 are configured as folded filters, and both are folded in a direction perpendicular to the axis. By controlling the degree of folding of the first filter screen 3 and the second filter screen 2, the length of the two filters along the axis of the oil outlet 43 can be controlled. When the angle formed by the folding line 22 on both sides of the first filter screen 3 or the second filter screen 2 becomes smaller, the length of the filter screen shortens; when the angle formed by the folding line 22 on both sides of the first filter screen 3 or the second filter screen 2 becomes larger, the length of the filter screen lengthens. In specific implementation, the length of the first filter screen 3 or the second filter screen 2 can be changed by applying tension to both ends of the first filter screen 3 or the second filter screen 2 through other components. To facilitate the adjustment of the length of the reducer lubricating oil filter device, this embodiment uses a support frame 4 that can extend and retract along the axis of the oil outlet 43, and connects the two ends of the first filter screen 3 and the second filter screen 2 to the two ends of the support frame 4 respectively. Thus, the reducer lubricating oil filter device can extend and retract simultaneously with the first filter screen 3 and the second filter screen 2.

[0051] like Figure 7 As shown, in this embodiment, the cross-sectional thickness of the second filter screen 2 gradually decreases from the cover 1 towards the oil outlet 43. With the aforementioned structure, the second filter screen 2 is thinner near the oil outlet 43 and thicker away from it. Thus, when the second filter screen 2 is subjected to tension at both ends due to the change in the length of the support frame 4, the thinner portion near the oil outlet 43 is stretched longer, resulting in a smaller effective filtration area 21 and thus a smaller flow rate of filtered lubricating oil. Conversely, the thicker portion away from the oil outlet 43 is stretched shorter, resulting in a larger effective filtration area 21 and thus a larger flow rate of filtered lubricating oil. Therefore, with the aforementioned structure, regardless of how the length of the reducer lubricating oil filter is adjusted, the flow rate of lubricating oil filtered by the portion of the second filter screen 2 away from the oil outlet 43 can be greater than the flow rate of lubricating oil filtered by the portion of the second filter screen 2 near the oil outlet 43. The filtered lubricating oil, located away from the second filter screen 2 and away from the oil outlet 43, can promptly replenish the flow of lubricating oil near the outlet, effectively preventing the generation of cavitation bubbles in the filtered lubricating oil.

[0052] This embodiment provides the following structure to achieve the extension and retraction of the support frame 4 along the axis of the oil outlet 43. In this embodiment, the support frame 4 includes a nut, a bolt, a first component, and a second component. The cover 1 is connected to the first component, and the oil outlet 43 is disposed on the second component. The first component and the second component are connected in a manner that allows them to move relative to each other along the axis of the oil outlet 43. The bolt is disposed along the axis of the oil outlet and is located outside the first filter screen 3. The nut is connected to the first component, and the bolt is connected to the second component. The bolt and the nut are threaded together. When the bolt rotates, it drives the second component to move relative to the first component along the axis of the oil outlet 43, thus extending and retracting the support frame 4.

[0053] In this embodiment, the bolt in the support frame 4 can be rotated. The threaded engagement of the bolt and nut causes the bolt to move relative to the nut along the axis of the oil outlet 43 during rotation, thereby causing the second component of the support frame 4 to move relative to the first component along the axis of the oil outlet 43. Thus, this embodiment uses the rotation of the bolt to move the second component relative to the first component along the axis of the oil outlet 43, achieving the extension and retraction of the support frame 4. Since the bolt is located outside the first filter screen 3, the length of the reducer lubricating oil filter device can be easily adjusted by rotating the bolt from outside the filter screen.

[0054] Example 2

[0055] This embodiment provides a speed reducer, including the speed reducer lubricating oil filter device described in Embodiment 1, wherein the speed reducer lubricating oil filter device is disposed on the speed reducer lubricating oil passage.

[0056] The reducer in this embodiment also includes a reducer oil plug, which includes a main body and a spherical magnetic component. The main body is provided with a connection structure for detachable connection with the reducer housing. A shielding part is provided at one end of the main body facing the inside of the reducer. The center of mass of the magnetic component is the center of the sphere of the magnetic component. The magnetic component is rotatably connected to the shielding part, and its axis of rotation passes through the center of the sphere of the magnetic component and is perpendicular to the direction of gravity. The magnetic component is divided into a first part and a second part by a first reference plane. The first part is shielded by the shielding part. The first reference plane is a plane that passes through the axis of rotation and has an angle of 8 degrees to 20 degrees with the horizontal plane.

[0057] The detachable connection structures include, but are not limited to, snap-fit, plug-in, and threaded connections.

[0058] When the oil plug is installed onto the oil inlet or drain hole of the reducer housing in this embodiment, the oil plug blocks the oil inlet and drain holes of the reducer, preventing lubricating oil inside the reducer from leaking from the oil inlet or drain hole. At this time, one end of the oil plug is inside the reducer, and the other end protrudes outside the reducer for easy removal. When the oil plug body 111 is installed onto the oil inlet or drain hole, the magnetic component faces the inside of the reducer, allowing the magnetic force generated by the magnetic field to attract iron filings in the lubricating oil inside the reducer to the magnetic component. When it is necessary to clean the iron filings attracted to the oil plug, simply remove the oil plug from the reducer housing, completely remove the iron filings attracted to the oil plug, and then reinstall the oil plug onto the oil inlet or drain hole. In this embodiment, the oil plug with attracted iron filings can also be removed from the reducer housing and replaced with a new oil plug.

[0059] In this embodiment, the outer surface of the main body 111 is provided with threads, and the reducer oil plug is detachably connected to the reducer housing through the threads of the main body 111. This ensures that the transmission oil plug reliably seals the oil filling hole or oil drain hole, and also facilitates the disassembly of the transmission oil plug.

[0060] In this embodiment, the magnetic component is spherical, and a shielding portion 30 is provided at one end of the main body 111 facing the interior of the reducer. The center of mass of the magnetic component is the center of the sphere. The magnetic component is rotatably connected to the shielding portion 30, and its axis of rotation passes through the center of the sphere and is perpendicular to the direction of gravity. The magnetic component is divided into a first part 51 and a second part 52 by a first reference plane 40. The first part 51 is shielded by the shielding portion 30. The first reference plane 40 is the angle between the axis of rotation and the horizontal plane 70. Figure 8 Angle A in the plane is a plane ranging from 8 degrees to 20 degrees.

[0061] In this embodiment, the magnetic component and the main body 111 are rotatably connected, allowing the magnetic component to rotate. When the magnetic component rotates to different angles, the part of the magnetic component facing the inside of the reducer also changes. This rotation allows for the full utilization of all parts of the magnetic component to attract iron filings from the reducer's lubricating oil. In this embodiment, the magnetic component is spherical, with the axis of rotation passing through its center. Since the center of mass of the magnetic component is the center of its sphere, the torque generated by the component's gravity on the axis of rotation is zero. Therefore, when the magnetic component is not attracting iron filings, it is in a relatively stable state. However, when iron filings are attracted to the magnetic component, the center of mass of the entire assembly of the magnetic component and the iron filings is not necessarily located at the center of the sphere, resulting in eccentricity. When the center of mass is not on the axis of rotation, the iron filings generate a torque relative to the axis of rotation, causing the magnetic component with the attracted iron filings to rotate around that axis.

[0062] In this embodiment, the shielding part 30 shields the magnetic component at the center of the sphere. The shielded part of the magnetic component cannot directly attract iron filings, while the unshielded part can. This embodiment divides the magnetic component into two parts using the first reference plane 40 as the boundary. One part is not shielded by the shielding part 30 and can attract iron filings from the reducer lubricating oil, while the other part is shielded and cannot attract iron filings from the reducer lubricating oil. Since the first reference plane 40, which serves as the decomposition plane between the unshielded part 30 and the shielded part 30, is a plane passing through the axis of rotation and forming an angle of 8 to 20 degrees with the horizontal plane 70, the center of mass of the part of the magnetic component that can attract iron filings does not pass through the axis of rotation, but is biased towards the left side of the magnetic component in the figure. Therefore, after the unshielded part 30 attracts iron filings, the center of mass of the magnetic component and the attracted iron filings as a whole also does not pass through the axis of rotation, but is biased to one side. The iron filings attracted by the magnetic component will generate a torque relative to the axis, causing the magnetic component to rotate around the axis. This embodiment employs the aforementioned asymmetrical shielding method, causing the center of mass of the entire assembly of the magnetic component and the iron filings to deviate from the axis of rotation of the magnetic component. This allows the magnetic component to rotate automatically while continuously attracting iron filings without external intervention from the reducer. This also allows the orientation of the magnetic component towards the reducer to change, enabling the use of more of the magnetic component to attract iron filings and increasing the amount of iron filings that can be attracted within a single cleaning cycle.

[0063] In this embodiment, the mounting structure further includes a rotating shaft. The magnetic component has a through hole passing through the center of the sphere. The rotating shaft passes through the through hole and is press-fitted with it. The shielding portion 30 has a first mounting hole and a second mounting hole, whose axes coincide. Both ends of the rotating shaft are respectively inserted into the first and second mounting holes, and the rotating shaft rotates within these holes. To better facilitate rotation relative to the two mounting holes, bearings can be installed in each of the two mounting holes, and then the two ends of the rotating shaft can be installed in the inner rings of the bearings.

[0064] In this embodiment, the rotating shaft can also be fixedly connected to the shielding part 30, so that the through hole of the magnetic component can rotate around the rotating shaft.

[0065] Example 3

[0066] This embodiment provides a new energy vehicle, which includes the reducer lubricating oil filtering device described in Embodiment 1, or the reducer described in Embodiment 2.

[0067] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A speed reducer, characterized in that, It includes a reducer lubricating oil filter and a reducer oil plug, with the reducer lubricating oil filter installed on the reducer lubricating oil passage; A gear reducer lubricating oil filtration device includes a first filter screen, a second filter screen, a support frame, and a cover. The first filter screen is formed into a cylindrical shape, and the second filter screen is located inside the first filter screen. One end of the support frame is provided with an oil outlet for the lubricating oil filtered by the second filter screen to flow out, and the other end is connected to the cover and then closed. The oil inlet side of the second filter screen is surrounded by the oil outlet side of the first filter screen, and the oil outlet is only connected to the oil outlet side of the second filter screen. The filtration accuracy of the first filter screen is less than that of the second filter screen; The first filter screen is connected to the support frame, and at least a portion of the second filter screen is connected to the inner wall of the first filter screen; The reducer oil plug includes a main body and a spherical magnetic component. The main body is provided with a connection structure for detachable connection with the reducer housing. A shielding part is provided at one end of the main body facing the inside of the reducer. The center of mass of the magnetic component is the center of the sphere of the magnetic component. The magnetic component is rotatably connected to the shielding part. Its axis of rotation passes through the center of the sphere of the magnetic component and is perpendicular to the direction of gravity. The magnetic component is divided into a first part and a second part by a first reference plane. The first part is shielded by the shielding part. The first reference plane is a plane that passes through the axis of rotation and has an angle of 8 degrees to 20 degrees with the horizontal plane.

2. The reducer according to claim 1, characterized in that, The second filter screen is folded to form multiple filter surfaces that are connected end to end.

3. The reducer according to claim 2, characterized in that, The junction of two adjacent filter surfaces abuts against the first filter screen, and the fold line formed by the junction of the two adjacent filter surfaces is parallel to the axis of the oil outlet. The second filter screen is folded and surrounds the axis of the oil outlet to form a circle.

4. The reducer according to claim 2, characterized in that, The end of the filter surface facing the first filter screen is bonded to the oil outlet side of the first filter screen and / or the side of the first filter screen facing the support frame is bonded to the support frame.

5. The reducer according to claim 2, characterized in that, The first filter screen is a folded filter screen, and the direction of the fold line of the first filter screen is perpendicular to the axial direction of the oil outlet. The direction of at least a portion of the fold line of the second filter screen is perpendicular to the axial direction of the oil outlet. The support frame is a support frame that can extend and retract along the axial direction of the oil outlet. The two ends of the first filter screen and the second filter screen are respectively connected to the two ends of the support frame. The cross-sectional thickness of the second filter screen gradually decreases from the cover towards the oil outlet.

6. The reducer according to claim 5, characterized in that, The support frame includes a nut, a bolt, a first component, and a second component. The cover is connected to the first component, and the oil outlet is located on the second component. The first component and the second component are connected in a manner that allows them to move relative to each other along the axis of the oil outlet. The bolt is located along the axis of the oil outlet and is situated outside the first filter screen. The nut is connected to the first component, and the bolt is connected to the second component. The bolt is threadedly connected to the nut. When the bolt rotates, it causes the second component to move relative to the first component along the axis of the oil outlet, thereby extending and retracting the support frame.

7. The reducer according to claim 2, characterized in that, The broken line on the filter surface near the oil outlet axis is parallel to the oil outlet axis, and the broken line away from the oil outlet axis gradually approaches the oil outlet axis from the cover towards the oil outlet.

8. A new energy vehicle, characterized in that, The reducer includes any one of claims 1 to 7.

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