A gearbox with a variable planetary structure

Abstract

The application relates to the field of new energy automobile manufacturing, and specifically discloses a gearbox with a variable planetary structure, which comprises a shell, a planetary gear set installed in the shell, a first motor for driving the planetary gear set to operate, and a filtering lubricating system, wherein the filtering lubricating system comprises a rotating ring, filter elements and an oil pump; the rotating ring is rotationally connected and arranged with the axis being horizontal in the shell; a temporary oil storage groove is arranged opposite to the rotating ring at the bottom of the shell; the liquid inlet end of the oil pump is connected to the temporary oil storage groove, and the liquid outlet end of the oil pump is connected to one end of the shell away from the temporary oil storage groove; a plurality of filter elements are arranged on the circumference of the rotating ring and used for sequentially matching the temporary oil storage groove; a maintenance door is arranged opposite to the rotating ring on the shell, and the height of the maintenance door is greater than the highest liquid level of the lubricating oil in the shell. The application can make the maintenance of the filter elements more convenient and fast.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy vehicle manufacturing, and in particular to a gearbox with a variable planetary structure. BACKGROUND

[0002] At present, the gearbox is one of the main components of the automobile transmission system. The actual use of the automobile is very complex, such as starting, idling parking, low-speed or high-speed driving, acceleration, deceleration, climbing and reversing, etc., which requires the driving force and speed of the automobile to change in a relatively large range, while the output torque and speed range of the widely used piston engine is relatively small. In order to adapt to the frequently changing driving conditions and at the same time make the engine work in a favorable working condition (higher power and lower fuel consumption), a gearbox is provided in the transmission system.

[0003] In related technologies, in order to achieve smooth operation of various types of gearboxes such as new energy vehicles, the internal components need to be lubricated. During operation, impurities will inevitably be generated in the gearbox, and if not filtered, these impurities will circulate with the lubricating liquid, causing continuous damage to the precision moving pairs.

[0004] At present, the lubricating liquid is filtered by setting an internal filter system in the gearbox, which continuously filters the lubricating liquid inside the gearbox, ensures the performance of the lubricating liquid, reduces the wear of the moving parts, and prolongs the service life of the gearbox.

[0005] For the related technologies in the above, the following defects exist: the current filter system is mainly divided into two types; one is to install a filter element at the bottom of the gearbox, such as the "gearbox bottom shell with filtering function" of CN212407502U, which integrates the filter element at the bottom of the oil pan. Although it can contact the settled impurities, it has a fatal defect: the filter element needs to be disassembled after emptying all the lubricating liquid (usually 10-15L) in the gearbox, even if the lubricating oil has not reached the replacement period, it needs to be discarded, resulting in material waste and increased maintenance cost (single maintenance cost increased by 300-500 yuan). And its single-sided fixing structure limits the filtering area (≤0.15㎡), which is easy to trigger the maintenance requirement due to frequent impurity accumulation.

[0006] The second is to install an external filter element at the top of the gearbox, such as the "gearbox lubricating and filtering system" of CN117366211A, which sets the filter module at the top of the shell. Although it is convenient to disassemble, metal impurities (accounting for more than 60% of the total amount of impurities in the gearbox) are settled in the oil pan due to gravity and cannot be captured by the top filter element, resulting in wear of precision components such as planetary gear sets. The lubricating mechanism of CN212985992U also uses external filtration, which also has the problem of insufficient impurity capture rate (≤55%).

[0007] In summary, the current gearbox filtration system is difficult to meet the needs of fully capturing metal impurities and easy maintenance. During maintenance, the filter device maintenance is troublesome and the lubricating oil is wasted. SUMMARY

[0008] In order to make the maintenance of the filter core convenient and fast, the application provides a gearbox with variable planetary structure.

[0009] The gearbox with variable planetary structure provided by the application adopts the following technical scheme:

[0010] The gearbox with variable planetary structure comprises a housing, a planetary gear set installed in the housing, and a first motor for driving the planetary gear set to operate, characterized in that it further comprises a filtration lubrication system, wherein the filtration lubrication system comprises:

[0011] A diameter expansion ring is coaxially installed at one end of the housing, an inner wall of the diameter expansion ring is provided with an annular groove coaxial with the housing and communicating with the inner cavity of the housing, and a temporary oil storage groove is located at the bottom of the annular groove, and the temporary oil storage groove is located at the lowest position in the housing;

[0012] A rotating ring is coaxially and rotatably arranged in the annular groove;

[0013] A plurality of filter cores are distributed on the rotating ring along the circumferential direction of the rotating ring, and the lubricating oil in the housing flows into the temporary oil storage groove after being filtered by the filter core at the lowest position;

[0014] A sealing plate is used to seal the liquid inlet of the filter core except the filter core at the lowest position, and the highest position of the sealing plate is higher than the highest liquid level of the lubricating oil in the housing;

[0015] An access door is installed on the diameter expansion ring and located above the highest liquid level of the lubricating oil in the housing, and the filter core can be maintained by opening the access door;

[0016] An oil pump is connected to the temporary oil storage groove at the liquid inlet end and connected to the other end of the housing at the liquid outlet end.

[0017] By adopting the technical scheme, when the gearbox is running, the oil pump is started to draw the lubricating oil at the bottom of the shell to the filter element at the lowest position, impurities are intercepted by the filter element, and the filtered lubricating oil enters the temporary oil storage groove, and then is drawn to the other end of the shell by the oil pump, thereby lubricating the planetary gear set and other components in the shell. The sealing plate only exposes the liquid inlet of the filter element at the lowest position, ensures the sealing of the non-working filter element, and avoids the unfiltered oil directly entering the filter element outside the lowest position. When the filter element at the temporary oil storage groove is blocked, the remaining new filter elements can be sequentially matched with the temporary oil storage groove through the rotation of the rotating ring, thereby realizing continuous filtering function and prolonging the service life of the filtering system. When the filter element needs to be replaced, since the height of the maintenance door is greater than the highest liquid level of the lubricating oil in the shell, after the blocked filter element is rotated to the maintenance door, the maintenance door can be directly opened for disassembly and other maintenance operations, without worrying about the overflow of lubricating oil. At the same time, the current gearbox maintenance also avoids the situation that the lubricating oil in the gearbox needs to be completely discharged in order to take out the filter element, thereby making the maintenance of the filter element convenient and fast.

[0018] Optionally, one end of the rotating ring is provided with a coaxially connected internal gear ring, the inner top of the internal gear ring is provided with a driving gear in meshing connection, and the driving gear is connected with a second motor installed on the shell.

[0019] By adopting the above technical scheme, the second motor drives the driving gear to rotate, the driving gear drives the meshing internal gear ring to rotate, the rotating ring rotates synchronously with the internal gear ring, and then the rotating drive of the rotating ring is realized.

[0020] Optionally, the sealing plate is provided with an oil outlet hole opposite to the temporary oil storage groove.

[0021] By adopting the above technical scheme, the oil outlet hole, the filter element at the lowest position and the temporary oil storage groove can form a vertical oil passage, which is beneficial to the smooth flow of lubricating oil through the oil outlet hole, the filter element at the lowest position and the temporary oil storage groove.

[0022] Optionally, the oil outlet hole is located at the lowest position in the shell.

[0023] And the inner bottom of the shell on both sides of the sealing plate is upwardly inclined.

[0024] By adopting the above technical scheme, the lubricating oil in the shell cavity naturally converges to the oil outlet hole at the lowest position due to gravity, and then flows into the temporary oil storage groove of the annular groove in a directional manner, thereby forming an oil passage path of "low-level convergence + precise flow guide", and ensuring that the lubricating oil in the shell enters the filtering system through the oil outlet hole to the greatest extent.

[0025] Optionally, a plurality of accommodating grooves corresponding to the plurality of filter elements are arranged on the outer side wall of the rotating ring.

[0026] The liquid inlet of the filter element is arranged at the top of the accommodating groove, and is used for receiving the lubricating oil flowing out of the oil outlet hole;

[0027] The lowest opening of the accommodating groove is in communication with the temporary oil storage groove.

[0028] By adopting the above technical scheme, the filter element is arranged in the groove one by one, and the liquid inlet of the filter element is arranged at the top of the accommodating groove, so that the installation of the filter element is realized. When the rotating ring rotates, the lubricating oil flowing into the shell through the oil outlet hole enters the filter element opposite to the oil outlet hole, and then flows to the temporary oil storage groove after being filtered, so that directional filtering is realized.

[0029] Optionally, the filter element comprises:

[0030] The side filter screen plate is tubular and is arranged in the accommodating groove in a spaced manner;

[0031] The bottom filter screen plate is arranged at one end of the side filter screen plate;

[0032] The neck ring is arranged at the other end of the side filter screen plate;

[0033] The oil inlet pipe is arranged at the other end of the side filter screen plate.

[0034] By adopting the above technical scheme, the filter screen pipe, the bottom filter screen plate, the neck ring and the oil inlet pipe form a necked bottle-shaped filter element main structure, so that the filter residue in the filter element is not easy to come out of the liquid inlet of the filter element. The side filter screen plate is arranged in the accommodating groove in a spaced manner, so that the oil outlet of the filter element is not blocked.

[0035] Optionally, the side filter screen plate and the bottom filter screen plate are both provided with a magnetic attraction member.

[0036] By adopting the above technical scheme, the magnetic attraction member is used for adsorbing small metal waste scraps in the lubricating liquid which are not easy to be intercepted by the filter screen.

[0037] Optionally, the oil inlet end of the oil inlet pipe is provided with a one-way door, and the one-way door is opened towards the inside of the filter element under the oil pressure of the lubricating oil.

[0038] By adopting the above technical scheme, when the filter element at the lowest position is blocked, the oil pump is first closed, and then the one-way door is closed under the oil pressure at the oil outlet hole, so that the filter residue is not re-entered into the lubricating liquid during the subsequent movement of the filter element, and then the subsequent maintenance of the blocked filter element is facilitated.

[0039] Optionally, the one-way door has two, and the two one-way doors are symmetrically arranged at the oil inlet end of the oil inlet pipe.

[0040] Two said one-way doors are hinged to the oil inlet pipe at one end away from each other;

[0041] Two said one-way doors are hinged to the oil inlet pipe at one end away from each other;

[0042] Two said one-way doors are hinged to the oil inlet pipe at one end away from each other;

[0043] Two said one-way doors are hinged to the oil inlet pipe at one end away from each other;

[0044] Two said one-way doors are hinged to the oil inlet pipe at one end away from each other;

[0045] By adopting the above technical scheme, the oil pump is opened, and under the action of oil pressure, when the oil flows from the oil inlet pipe to the filter element, the pressure pushes away the one-way door (the torsional spring deforms) to enter the inside of the filter element for purification. If the filter element at the temporary oil storage tank needs to be replaced, the oil pump is stopped, the torsional spring is reset to drive the one-way door to close, the limiting beam limits the transition rotation, a one-way passage is formed, and backflow of lubricating liquid and impurities in the filter element is avoided, then the rotating ring can be rotated according to actual needs to switch the filter element at the temporary oil storage tank or replace the filter element at the maintenance door. The limiting beam is used to limit the reset position of the one-way door.

[0046] In summary, the present application has at least one of the following beneficial technical effects:

[0047] 1. In the present application, when the filter element is replaced, the oil pump is closed, at this time, under the reset elastic force of the torsional spring, the one-way door rotates and resets against the limiting beam, and then the liquid inlet of the filter element, that is, the oil inlet pipe, is sealed, so that the filter residue in the filter element does not come out during the subsequent movement. Then the rotating ring is rotated to move the blocked filter element to the maintenance hole, the maintenance door is opened, the bolt connection between the side connecting rod and the rotating ring is removed, the filter element is pulled out through the handle, then a new filter element is installed in the receiving groove, and the maintenance door is closed. Since the maintenance door is located above the oil level inside the shell, the lubricating oil does not need to be discharged, and the maintenance door can be directly opened to replace the filter element, and the condition of oil leakage at the bottom of the shell due to the maintenance door is also avoided.

[0048] 2. In the present application, since multiple filter elements are arranged circumferentially on the rotating ring, when the oil passage is not smooth, if the filter element is not convenient to replace by disassembly and assembly, or if all the filter elements are not used up and the filter element is not intended to be replaced temporarily, the rotating ring can be directly driven to rotate by a certain angle, so that the adjacent new filter element is aligned with the oil outlet hole and the temporary oil storage tank. In this way, without disassembling and assembling a new filter element, the filter element at the oil outlet hole and the temporary oil storage tank can be replaced with a new one. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0050] Figure 1 is a schematic diagram of the overall structure of a gearbox with a variable planetary structure according to an embodiment of the present application;

[0051] Figure 2 is a schematic diagram of the axial cross-sectional structure of a gearbox with a variable planetary structure according to an embodiment of the present application;

[0052] Figure 3 is a schematic diagram of the radial cross-sectional structure of the diameter expansion ring part according to an embodiment of the present application;

[0053] Figure 4 is Figure 3 is an enlarged schematic diagram of part A in

[0054] Figure 5 is a schematic diagram of the overall structure of the filter core from the top;

[0055] Figure 6 is a schematic diagram of the overall structure of the filter core from the bottom;

[0056] Figure 7 is a schematic diagram of the combined structure of the rotating ring, the ring gear, the driving gear and the second motor.

[0057] Reference signs:

[0058] 1, housing; 11, planetary gear set; 12, first motor; 2, filter lubrication system; 21, diameter expansion ring; 2101, annular groove; 2102, temporary oil storage groove; 2103, maintenance hole; 22, maintenance door; 23, sealing plate; 2301, oil outlet hole; 24, rotating ring; 2401, accommodating groove; 241, ring gear; 242, driving gear; 243, second motor; 25, filter core; 251, side filter screen plate; 252, bottom filter screen plate; 253, neck ring; 254, oil inlet pipe; 255, one-way door; 256, torsional spring; 257, limiting beam; 258, side connecting rod; 259, handle; 250, magnetic attraction accessory; 26, oil pump; 261, oil outlet pipe. DETAILED DESCRIPTION

[0059] The present application will be described in further detail below. Figures 1-7 The present application will be described in further detail below.

[0060] The present application discloses a gearbox with a variable planetary structure.

[0061] Referring to Figure 1 and Figure 2 , a gearbox with a variable planetary structure comprises a housing 1, a planetary gear set 11 mounted in the housing 1, and a first motor 12 for driving the planetary gear set 11 to operate, wherein the planetary gear set 11 and the first motor 12 are both prior art.

[0062] Referring to Figure 1 , Figure 2 and Figure 3 , the gearbox with a variable planetary structure further comprises a filtered lubrication system 2 arranged on one side of the housing 1, the filtered lubrication system 2 comprising a diameter expansion ring 21, an access door 22, a sealing plate 23, a rotating ring 24, a filter element 25, and an oil pump 26, wherein the diameter expansion ring 21 is a circular ring, the diameter expansion ring 21 is sleeved and mounted on the housing 1, the diameter expansion ring 21 is coaxially arranged with the planetary gear set 11, the axis of the diameter expansion ring 21 is horizontally arranged, and the diameter expansion ring 21 and the housing 1 are integrally formed.

[0063] Referring to Figure 2 , Figure 3 and Figure 4 , the inner wall of the diameter expansion ring 21 is provided with a coaxial annular groove 2101, and the groove opening of the annular groove 2101 is communicated with the inner cavity of the housing 1. The bottom of the lowest position of the annular groove 2101 is provided with a temporary oil storage groove 2102. The upper part of the annular groove 2101 is provided with an access hole 2103, and the height of the access hole 2103 is greater than the highest liquid level of the lubricating oil injected into the inner cavity of the housing 1. For example, the height of the lubricating oil in the conventional housing 1 is generally between 1 / 3 and 2 / 3 of the height of the inner cavity of the housing 1, and the height of the access hole 2103 here needs to be greater than 2 / 3 of the height of the inner cavity of the housing 1, but in actual application, the actual highest lubricating oil level of the corresponding type of gearbox should be used as the reference, and it is ensured that the lubricating oil will not flow out of the access hole 2103 when the vehicle is parked horizontally. The access door 22 is mounted on the housing 1 at the position of the access hole 2103, and is used to seal the access hole 2103.

[0064] Referring to Figure 2 , Figure 3 and Figure 4 , the sealing plate 23 is arranged inside the groove opening of the annular groove 2101, the two ends of the sealing plate 23 in the width direction are connected with the inner walls of the housing 1 on both sides of the annular groove 2101, and the two ends of the sealing plate 23 in the width direction are sealingly connected with the housing 1. An oil outlet hole 2301 is arranged at the lowest position of the sealing plate 23 and opposite to the temporary oil storage groove 2102, and in order to ensure that all the lubricating oil in the housing 1 can pass through the oil outlet hole 2301, referring to Figure 2The inner bottom of the shell 1 on both sides of the sealing plate 23 is upwardly inclined, so that the oil outlet hole 2301 is at the lowest position in the inner cavity of the shell 1, and the two ends of the sealing plate 23 in the width direction are also smoothly connected with the inner wall of the shell 1. The two ends of the sealing plate 23 in the length direction are higher than the highest liquid level of the lubricating oil in the shell 1, and the top slot of the annular groove 2101 cannot be blocked. Specifically, the width direction of the sealing plate 23 is the axis direction of the shell 1, and the sealing plate 23 is fixedly connected with the inner wall of the shell 1. Moreover, the cross-sectional shape of the sealing plate 23 is not limited, as long as it can block the other accommodation grooves 2401 except the lowest position, and the highest position of the sealing plate 23 is higher than the highest liquid level of the lubricating oil in the shell 1. Preferably, the cross-sectional shape of the sealing plate 23 is U-shaped or crescent-shaped.

[0065] With reference to Figure 2 , Figure 3 and Figure 4 , a rotating ring 24 coaxial with the ring-shaped groove 2101 is arranged between the sealing plate 23 and the enlarged diameter ring 21. The rotating ring 24 is arranged outside the slot of the ring-shaped groove 2101, and can rotate relative to the enlarged diameter ring 21 and the sealing plate 23.

[0066] With reference to Figure 2 and Figure 7 , an inner gear ring 241 coaxial with the rotating ring 24 is arranged on the inner side of the end of the rotating ring 24 away from the shell 1. The inner gear ring 241 is fixedly connected with the rotating ring 24 coaxially, and the inner side top of the inner gear ring 241 is provided with a driving gear 242 engaged therewith. The driving gear 242 is driven by a second motor 243, and the sealing structure involved in the installation process of the second motor 243 can be installed in a conventional manner conforming to the production standard of the gearbox. Here, the inner gear ring 241 is not in contact with other components except being coaxially connected with the rotating ring 24 and engaged with the driving gear 242, thereby avoiding the influence of the rotating ring 24 and other components outside the driving gear 242 on the operation of the inner gear ring 241, and ensuring smooth driving of the rotating ring 24. Specifically, the second motor 243 drives the driving gear 242, the driving gear 242 drives the inner gear ring 241, the rotating ring 24 rotates synchronously with the inner gear ring 241, thereby realizing the rotary driving of the rotating ring 24.

[0067] With reference to Figure 2 , Figure 3 and Figure 4The outer side wall of the rotating ring 24 is provided with a plurality of accommodating grooves 2401 arranged radially. The plurality of accommodating grooves 2401 are uniformly distributed along the circumference of the rotating ring 24, and by rotating the rotating ring 24, the plurality of accommodating grooves 2401 are sequentially matched with the oil outlet hole 2301 and the temporary oil storage groove 2102. For example, when one of the accommodating grooves 2401 is at the lowest position of the rotating ring 24, the accommodating groove 2401, the temporary oil storage groove 2102 and the oil outlet hole 2301 can be coaxially communicated to form a vertical oil channel. In order to ensure the smoothness of the vertical oil channel, the inner diameter of the vertical oil channel needs to be equal or increasing from top to bottom, and thus the inner diameter of the accommodating groove 2401 is greater than or equal to the inner diameter of the oil outlet hole 2301, and the inner diameter of the temporary oil storage groove 2102 is greater than or equal to the inner diameter of the accommodating groove 2401.

[0068] Referring to Figure 3 , Figure 4 , Figure 5 and Figure 6 , each of the accommodating grooves 2401 is provided with a filter element 25. The filter element 25 includes a side filter screen plate 251, a bottom filter screen plate 252, a neck ring 253 and an oil inlet pipe 254. Referring to Figure 5 and Figure 6 , the side filter screen plate 251 is a rectangular tubular filter screen. In other embodiments, the side filter screen plate 251 can also be a circular tube, a prism tube or other various shapes of filter screen. The tubular side filter screen plate 251 is coaxially and spacedly arranged in the accommodating groove 2401. The upper end of the side filter screen plate 251 is provided with a coaxial neck ring 253, and the inner hole of the neck ring 253 is provided with an oil inlet pipe 254 for communicating with the oil outlet hole 2301. The lower end of the side filter screen plate 251 is provided with a bottom filter screen plate 252, and thus the side filter screen plate 251, the bottom filter screen plate 252, the neck ring 253 and the oil inlet pipe 254 form a necked bottle-shaped filter element 25 main structure, which can prevent the filter residue from coming out of the liquid inlet of the filter element 25 main structure, i.e. the oil inlet pipe 254. In order to make the installation of the filter element 25 more stable, a plurality of side connecting rods 258 are arranged on the sidewall of the filter element 25, and the side connecting rods 258 are connected with the rotating ring 24 by bolts.

[0069] Referring to Figure 3 , Figure 4 , Figure 5 and Figure 6, the main impurities of the lubricating oil generated during the operation of the gearbox are solid impurities mainly metal abrasion generated by the operation of the planetary gear set 11 and other components, the main structure of the filter element 25 is to filter the slightly larger solid impurities in the lubricating oil, and some small metal abrasion is removed by magnetic adsorption. Here, the magnetic adsorption members 250 are arranged at intervals on the inner walls of the side filter screen plate 251, the bottom filter screen plate 252 and the necked ring 253. When the main structure of the filter element 25 at the oil outlet hole 2301 is blocked and needs to be cleaned or replaced, the second motor 243 drives the rotating ring 24 to rotate, so that the blocked filter element 25 moves to the maintenance hole 2103, and the filter element 25 is taken out by opening the maintenance door 22. In order to facilitate the movement of the filter element 25, a handle 259 is arranged on the back of the bottom filter screen plate 252.

[0070] With reference to Figure 3 , Figure 4 and Figure 5 , in order to further avoid the filter residue from the liquid inlet of the filter element 25 during the movement of the filter element 25, two one-way doors 255 are symmetrically arranged at the oil inlet end of the oil inlet pipe 254, one end of each of the two one-way doors 255 is hinged to the oil inlet pipe 254, and a torsional spring 256 is further connected between the one-way door 255 and the oil inlet pipe 254. Specifically, the one-way door 255 is hinged to the outer top of the oil inlet pipe 254 by a conventional hinge, the torsional spring 256 is sleeved on the shaft part in the middle of the hinge, one torsional arm of the torsional spring 256 is connected to the one-way door 255, and the other torsional arm of the torsional spring 256 is connected to the oil inlet pipe 254, so that the torsional spring 256 can exert a torsional force on the one-way door 255 to rotate and reset upward when the one-way door 255 does not bear the pressure of the lubricating oil. The opposite ends of the two one-way doors 255 are inclined to the direction of the bottom filter screen plate 252. The side of the two one-way doors 255 away from the bottom filter screen plate 252 is provided with a limiting beam 257 installed on the outer top of the oil inlet pipe 254, and the opposite ends of the two one-way doors 255 are in contact with the limiting beam 257.

[0071] With reference to Figure 1 , the bottom of the temporary oil storage tank 2102 is connected to the oil pump 26 through the oil outlet pipe 261, and the oil outlet end of the oil pump 26 is connected in communication with the inner cavity of the housing 1 away from the oil outlet hole 2301 through the backflow pipe. The oil outlet end of the oil pump 26 is also provided with a hydraulic oil pressure gauge, which can determine whether the oil circulation is blocked and whether the filter element 25 is blocked by the change of oil pressure. Specifically, if the oil circulation is blocked, the oil pressure is high, and if the circulation is smooth, the oil pressure is normal.

[0072] With reference to Figure 1 , Figure 2 , Figure 3 and Figure 4When the filter element 25 is working, under the action of the pressure of the lubricating oil and the suction force of the oil pump 26, the one-way door 255 at the oil outlet hole 2301 rotates downward to open, so that the lubricating oil can flow smoothly into the filter element 25, thereby realizing the filtration of the lubricating oil. Among them, the inlet pipe of the oil pump 26 in Figure 1 is marked with an arrow indicating the flow direction of the lubricating oil, and the flow direction of the lubricating oil in the vertical oil channel formed by the oil outlet hole 2301, the accommodating groove 2401, and the temporary oil storage groove 2102 in Figure 2 is marked. When cleaning and replacing the filter element 25, the oil pump 26 is turned off, at this time, under the restoring force of the torsional spring 256, the one-way door 255 rotates and resets against the limiting beam 257, thereby sealing the inlet of the filter element 25, that is, the oil inlet pipe 254, to prevent the filter residue from coming out of the filter element 25 during subsequent movement. Then, the second motor 243 is driven to rotate the rotating ring 24, so that the blocked filter element 25 moves to the inspection hole 2103, the inspection door 22 is opened, the bolt connection between the side connecting rod 258 and the rotating ring 24 is removed, and then the filter element 25 is pulled out through the handle 259. Since the inspection door 22 is arranged above the oil level inside the shell 1, it is not necessary to discharge the lubricating oil to directly open the inspection door 22 to replace the filter element 25, and the condition of oil leakage at the bottom of the shell 1 due to the inspection door 22 is also avoided.

[0073] In addition, since the rotating ring 24 is provided with a plurality of filter elements 25 circumferentially, when the oil passage is not smooth, if the filter element 25 is inconvenient to replace by disassembly and assembly, or since all the filter elements 25 have not been used up, it is temporarily not intended to replace the filter element 25, the second motor 243 can be directly driven to rotate the rotating ring 24 by a certain angle, so that the adjacent new filter element 25 is aligned with the oil outlet hole 2301 and the temporary oil storage groove 2102. In this way, without disassembling and assembling a new filter element 25, the filter element 25 at the oil outlet hole 2301 and the temporary oil storage groove 2102 can be replaced with a new one.

[0074] Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the usual meaning understood by a person with ordinary skills in the art to which the present application belongs. The terms "first", "second", "third" and the like used in the specification and claims of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "one" or "a" and the like do not represent a quantity limitation, but represent the existence of at least one. The terms "including", "containing" and the like mean that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0075] The above are all optional embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A gearbox with a variable planetary structure, comprising a housing (1), a planetary gear set (11) mounted in the housing (1), and a first electric motor (12) driving the planetary gear set (11) in operation, characterized in that: Also comprising a filtering lubricating system (2) comprising: a diameter expanding ring (21) coaxially installed at one end of the shell (1), an inner wall of the diameter expanding ring (21) being provided with an annular groove (2101) coaxial with the shell (1) and communicating with an inner cavity of the shell (1) and a temporary oil storage groove (2102) located at a groove bottom of the annular groove (2101), the temporary oil storage groove (2102) being located at a lowest position in the shell (1); a rotating ring (24) coaxially and rotatably arranged in the annular groove (2101); a plurality of filter elements (25) distributed on the rotating ring (24) along a circumferential direction of the rotating ring (24), lubricating oil in the shell (1) flowing to the temporary oil storage groove (2102) after being filtered by the filter elements (25) at the lowest position; a sealing plate (23) for sealing liquid inlets of the filter elements (25) except those at the lowest position, a highest position of the sealing plate (23) being higher than a highest liquid level of the lubricating oil in the shell (1); an inspection door (22) installed on the diameter expanding ring (21) and located above the highest liquid level of the lubricating oil in the shell (1), the filter elements (25) being capable of being maintained by opening the inspection door (22); an oil pump (26) with an inlet end connected to the temporary oil storage groove (2102) and an outlet end connected to the other end of the shell (1); the sealing plate (23) being provided with an oil outlet hole (2301) opposite to the temporary oil storage groove (2102); the rotating ring (24) being provided with a plurality of accommodating grooves (2401) corresponding to the plurality of filter elements (25) on an outer side wall thereof; the filter element (25) comprising: a side filter screen plate (251) being tubular and being arranged in the accommodating groove (2401) in a spaced manner; a bottom filter screen plate (252) arranged at one end of the side filter screen plate (251); a necking ring (253) arranged at the other end of the side filter screen plate (251); an oil inlet pipe (254) having one end installed in an inner hole of the necking ring (253) and the other end arranged at a groove top of the accommodating groove (2401) for receiving lubricating oil flowing out of the oil outlet hole (2301); the oil inlet end of the oil inlet pipe (254) being provided with a one-way door (255), the one-way door (255) being capable of being opened towards an inside of the filter element (25) under oil pressure of the lubricating oil; the one-way door (255) having two, the two one-way doors (255) being symmetrically arranged at the oil inlet end of the oil inlet pipe (254); the two one-way doors (255) being hinged to the oil inlet pipe (254) at one ends thereof away from each other; the two one-way doors (255) being connected with torsional springs (256) at the one ends thereof away from each other; the two one-way doors (255) being arranged in a tilted manner towards the inside of the filter element (25) at opposite ends thereof; the two one-way doors (255) being provided with a limiting beam (257) installed on the oil inlet pipe (254) at sides thereof away from the bottom filter screen plate (252). The opposite ends of the two one-way doors (255) are in contact with the limiting beam (257).

2. A gearbox with a variable planetary structure according to claim 1, characterized in that: One end of the rotating ring (24) is provided with an internal gear ring (241) coaxially connected. The inner top of the internal gear ring (241) is provided with a meshing drive gear (242). The drive gear (242) is connected to a second motor (243) installed on the housing (1).

3. A gearbox with a variable planetary structure according to claim 1, characterized in that: The oil outlet (2301) is located at the lowest position inside the housing (1); Furthermore, the inner bottom of the shell (1) on both sides of the sealing plate (23) is inclined upward.

4. A gearbox with a variable planetary structure according to claim 1, characterized in that: The inlet of the filter element (25) is located at the top of the receiving tank (2401) to receive the lubricating oil flowing out of the oil outlet (2301); The opening of the lowest position of the receiving tank (2401) can communicate with the temporary oil storage tank (2102).

5. A gearbox with a variable planetary structure according to claim 1, characterized in that: The inner walls of the side filter plate (251) and the bottom filter plate (252) are provided with magnetic adsorption components (250).

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