Oil-cooled drive motor

Abstract

The utility model relates to oil cooling type driving motor. The utility model discloses a kind of oil cooling type driving motor including replaceable oil filter, oil cooling type driving motor is equipped with opening / closing device on oil flow path, to prevent oil leakage during oil filter replacement. More specifically, the utility model provides a kind of oil cooling type driving motor including replaceable oil filter, which is equipped with inlet opening / closing device and outlet opening / closing device;Inlet opening / closing device can seal the oil inlet for supplying oil to the oil filter space during the replacement of oil filter, and the outlet opening / closing device can block the oil flow path through which the filtered oil flows. In particular, the utility model provides an oil cooling type driving motor including replaceable oil filter, wherein the inlet opening / closing device and the outlet opening / closing device are configured to open or block the oil inlet and the oil flow path together with the rotation of the oil filter during replacement.

Description

Technical Field

[0001] This utility model relates to a liquid-cooled drive motor including a replaceable oil filter, and more specifically, to a liquid-cooled drive motor including a replaceable oil filter: the liquid-cooled drive motor is provided with an opening / closing device in the oil flow path to prevent oil leakage from the filter housing during oil filter replacement. Background Technology

[0002] Hybrid vehicles operate in either electric vehicle (EV) mode, which uses only the power of the drive motor, or hybrid electric vehicle (HEV) mode, which uses the rotational power of both the engine and the drive motor. The drive motor, which serves as the vehicle's power source, includes a stator core and a rotor core, wherein the stator core is connected within the motor housing, and the rotor core is disposed inside the stator core.

[0003] A refrigerant flow path is formed on the housing to cool the heat generated by the stator core and rotor core during motor operation, and the refrigerant flows through the flow path to cool the stator core and rotor core.

[0004] Therefore, directly cooling the inside of the motor with oil will cause foreign objects such as chips generated in the reducer to move with the oil. If they are not removed, they may cause problems with the operation of the motor.

[0005] Therefore, an oil filter is placed in the cooling flow path where the oil moves to filter chips and foreign matter along with the oil. Recently, oil filters have been designed to be replaceable, allowing the installed oil filter to be removed and a new one installed after a certain period of time, thereby improving foreign matter removal efficiency.

[0006] During filter removal, due to oil leakage, the conventional drive motor, including the replaceable oil filter, needs to completely drain the oil before the filter is replaced, and there is also a cumbersome oil replenishment process after the replacement.

[0007] Therefore, there is a need to develop a technology that blocks the oil flow path during oil filter replacement to prevent oil leakage. Utility Model Content

[0008] This invention is conceived to solve the above-mentioned problems, and one object of this invention is to provide an oil-cooled drive motor including a replaceable oil filter, wherein the oil-cooled drive motor is equipped with an opening / closing device in the oil flow path to prevent oil leakage during oil filter replacement.

[0009] Another object of this invention is to provide an oil-cooled drive motor including a replaceable oil filter, the oil-cooled drive motor being equipped with an inlet opening / closing device and an outlet opening / closing device; the inlet opening / closing device is capable of sealing the oil inlet supplying oil to the oil filter space during oil filter replacement, and the outlet opening / closing device is capable of blocking the upstream side of the oil flow path of the supplied filtered oil.

[0010] Another object of this invention is to provide an oil-cooled drive motor including a replaceable oil filter, wherein, during replacement, the inlet opening / closing device and the outlet opening / closing device are rotaryly interlocked with the oil filter to open or block the oil inlet and the oil flow path.

[0011] An oil-cooled drive motor according to an embodiment of the present invention includes: a housing housing in which a component is housed, the housing having an oil flow path through which refrigerant flows to cool the component; a filter housing formed on the housing; and a replaceable oil filter replaceably connected to the filter housing to filter foreign matter in the refrigerant, wherein the filter housing includes: a filter insertion space configured to permanently house the oil filter; an oil inlet configured to communicate the filter insertion space with the discharge side of the oil flow path to supply oil to the filter insertion space; an oil discharge pipe configured to communicate with the inlet side of the oil flow path to return oil filtered by the oil filter to the oil flow path, the oil discharge pipe protruding toward the filter insertion space; and an open / close door disposed on the inner surface of the filter insertion space, the open / close door being configured to seal the oil inlet by moving to one side in the circumferential direction and to open the oil inlet by moving to the other side in the circumferential direction.

[0012] Furthermore, the replaceable oil filter is configured to be inserted into the filter insertion space in the axial direction and then constrained or released by rotation, and the replaceable oil filter includes a cylindrical filter body configured to filter the oil supplied to the filter insertion space as the oil moves radially inward toward the hollow portion of the filter body. The filter body includes a first-1 drive protrusion and a first-2 drive protrusion, the first-1 drive protrusion being formed on one side in the circumferential direction, and the first-2 drive protrusion being formed at intervals on the other side. On one side, the first-1 drive protrusion and the first-2 drive protrusion are both formed around the axial outer circumference of the filter body and protrude radially outward. When the replaceable oil filter is inserted into the filter insertion space, the first-1 drive protrusion and the first-2 drive protrusion are configured to assemble the circumferential end of the open / close door between the first-1 drive protrusion and the first-2 drive protrusion, such that during constraint or release, the open / close door reciprocates in the circumferential direction together with the rotation of the replaceable oil filter.

[0013] Furthermore, the open / close door is configured to open the oil inlet when the replaceable oil filter is constrained and to seal the oil inlet when the replaceable oil filter is released, wherein the replaceable oil filter is constrained in the filter insertion space by rotating to one side in the circumferential direction and is released from the filter insertion space by rotating to the other side in the circumferential direction.

[0014] Furthermore, the inner surface of the filter insertion space includes: a first track groove that is radially recessed outward along the circumferential direction and configured to guide the circumferential movement of the first-1 drive protrusion and the first-2 drive protrusion; and a second track groove that is radially recessed outward along the axial direction and configured to guide the axial movement of the first-1 drive protrusion and the first-2 drive protrusion.

[0015] Furthermore, the open / close door is formed as a plate with an arcuate cross-section, the plate being configured to slide along the inner surface of the filter insertion space, and the open / close door includes a first track protrusion on the outer peripheral surface of the open / close door, the first track protrusion being formed along the circumferential direction and projecting radially outward to insert into the first track groove.

[0016] Furthermore, the first-1 driving protrusion and the first-2 driving protrusion are formed on the axial outer side of the filter body, and the second-1 driving protrusion and the second-2 driving protrusion are formed at a certain distance inward in the axial direction from the first-1 driving protrusion and the first-2 driving protrusion of the filter body.

[0017] In addition, the filter insertion space includes a radially inwardly projecting stop configured to abut against a circumferential end on one side of the open / close door to prevent further circumferential movement when the open / close door seals the oil inlet.

[0018] In addition, the oil-cooled drive motor also includes an outlet opening / closing device configured to open or close the inlet side of the oil discharge pipe.

[0019] Furthermore, the oil-cooled drive motor also includes an outlet opening / closing device located at the end of the oil discharge pipe. The outlet opening / closing device is configured to open or close the oil discharge pipe. The outlet opening / closing device includes a rubber seal configured to close the oil discharge pipe under normal conditions and open the oil discharge pipe under pressure. The replaceable oil filter also includes a pressing protrusion configured to press the outlet opening / closing device during axial inward movement for installation and to release the pressure on the outlet opening / closing device during axial outward movement for removal. Attached Figure Description

[0020] Figure 1 This is a cross-sectional perspective view illustrating a filter housing and an oil flow path connected to a drive motor with an oil filter, according to an embodiment of the present invention.

[0021] Figure 2 This is a cross-sectional perspective view illustrating a filter housing, oil flow path, and inlet opening / closing device of a drive motor connected to an oil filter, according to an embodiment of the present invention.

[0022] Figure 3 This is a perspective cross-sectional view illustrating a filter housing according to an embodiment of the present invention;

[0023] Figure 4A and Figure 4B These are front and rear perspective views of the open / closed door according to embodiments of the present invention.

[0024] Figure 5 This is a cross-sectional perspective view illustrating a filter housing with an open / close door according to an embodiment of the present invention;

[0025] Figure 6 This is a perspective cross-sectional view of a filter housing with an oil inlet sealed by an opening / closing door, according to an embodiment of the present invention.

[0026] Figure 7 This is a perspective view of an oil filter including an inlet opening / closing device according to an embodiment of the present invention;

[0027] Figure 8 This is a cross-sectional perspective view illustrating a filter housing including an outlet opening / closing device according to an embodiment of the present invention;

[0028] Figure 9 This is a cross-sectional perspective view of an oil filter according to an embodiment of the present invention; and

[0029] Figure 10 This is a cross-sectional perspective view illustrating the opening / closing mechanism of the outlet opening / closing device caused by the connection between the filter housing and the oil filter according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures

[0031] 1000: Drive motor

[0032] 100: Casing

[0033] 110: Oil flow path

[0034] 200: Filter housing

[0035] 210: Oil discharge pipe

[0036] 220: Oil Inlet

[0037] 230: Stop component

[0038] 250: Filter insertion space

[0039] 251: Track Slot 1-1

[0040] 252: Track slots 1-2

[0041] 253: Second track slot

[0042] 300: Oil filter

[0043] 310: Filter body

[0044] 311: Top Cover

[0045] 312: Connection Frame

[0046] 315: Hollow Section

[0047] 320: Filter cover

[0048] 340: Press the protrusion

[0049] 600: Open / Close Door

[0050] 610: First track protrusion

[0051] 620: Second orbital bulge

[0052] 710: First drive protrusion

[0053] 720: Second drive protrusion

[0054] 800: Exit Opening / Closing Device Detailed Implementation

[0055] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0056] Figure 1 This is a perspective cross-sectional view of a filter housing 200 and an oil flow path 110 on a drive motor housing 100 connected to an oil filter 300, according to an embodiment of the present invention.

[0057] As shown in the figure, the oil-cooled drive motor 1000 according to an embodiment of the present invention includes a housing 100 and a filter housing 200; the housing 100 accommodates the stator and rotor of the drive motor, and the filter housing 200 is integrally formed with the housing 100 and accommodates an oil filter 300.

[0058] The housing 100 has an oil flow path 110 through which refrigerant flows to cool the components, and a filter housing 200 for connecting the oil filter 300 can be integrally formed with the housing 100.

[0059] The filter housing 200 is a cylinder with an internally formed filter insertion space 250, its inner end sealed by the housing 100, and its outer end open. At the inner end of the filter housing 200, an oil discharge pipe 210 can protrude outward at its center. The upstream side of the oil discharge pipe 210 is connected to the inlet side of the oil flow path 110 to supply filtered oil from the oil filter 300 to the oil flow path 110. Additionally, the filter housing 200 has an oil inlet 220 for introducing oil into the oil filter 300 (see...). Figure 4A , Figure 4B Furthermore, the oil inlet 220 can be connected to the discharge side formed at the end of the oil flow path 110.

[0060] The oil filter 300 includes a cylindrical filter body 310 and a filter cover 320. The filter cover 320 is located at the outer end of the filter body 310 to seal the opening side of the filter housing 200 and fix the filter body 310 to the filter housing 200. The filter body 310 and the filter cover 320 can be integrally formed as in this embodiment, or they can be formed separately. The filter body 310 can be a hollow cylinder along its longitudinal direction, wherein the oil discharge pipe 210 passes through the inner end of the hollow portion to discharge oil from the hollow portion to the oil flow path 110. Therefore, the oil introduced into the filter housing 200 through the oil inlet 220 passes through the filter body 310 for filtration, flows into the radially inner hollow portion of the filter body 310, and returns to the inlet side of the oil flow path 110 through the oil discharge pipe 210.

[0061] Figure 2 This is a cross-sectional perspective view illustrating a filter housing 200, an oil flow path 110, and an inlet opening / closing device connected to a drive motor of an oil filter 300, according to an embodiment of the present invention.

[0062] As illustrated, the drive motor also includes an inlet opening / closing device to open or close the oil inlet 220 formed on the filter housing 200 (see Figure 200). Figure 3 The inlet opening / closing device includes an opening / closing door 600 and a first drive protrusion 710 and a second drive protrusion 720; the opening / closing door 600 is disposed on the inner circumferential surface of the filter insertion space 250 and reciprocates in the circumferential direction; the first drive protrusion 710 and the second drive protrusion 720 are disposed on the filter body 310 so as to allow the opening / closing door 600 to slide circumferentially during the rotation of the oil filter 300 about its axis for replacement.

[0063] During installation, the oil filter 300 is axially inserted into the filter housing 200 and rotated circumferentially by a certain angle to secure it to the filter housing 200, achieving a stable connection. During removal, the oil filter 300 is rotated in the opposite direction by a certain angle to release the fixation and then moved axially to separate it from the filter housing 200. Therefore, by providing a first drive protrusion 710 and a second drive protrusion 720 on the filter body 310 to move the open / close door 600, the open / close door 600 slides circumferentially by a certain angle together with the rotation of the oil filter 300, thereby opening or sealing the oil inlet 220.

[0064] The following description, in conjunction with the accompanying drawings, will provide a more detailed account of an inlet opening / closing device having the above-described structure according to an embodiment of the present invention.

[0065] Figure 3This is a perspective cross-sectional view of the inner surface of the filter insertion space 250 of the filter housing 200 according to an embodiment of the present invention.

[0066] As illustrated, the inner surface of the filter insertion space 250 has an oil inlet 220, which communicates with the downstream side of the oil flow path 110 to supply oil into the filter insertion space 250. Additionally, at the internal center of the filter insertion space 250, an oil discharge pipe 210 can protrude toward the filter insertion space 250, which communicates with the upstream side of the oil flow path 110 to supply filtered oil to the oil flow path 110. Here, the inner surface of the filter insertion space 250 can be formed with a first track groove to guide the sliding of the opening / closing door 600 and the circumferential movement of the first drive protrusion 710 and the second drive protrusion 720. The first track groove is formed circumferentially, including a first-1 track groove 251 formed on the outer side and a first-2 track groove 252 spaced inwardly from the first-1 track groove 251. The first track groove can be radially recessed outward from the inner surface of the filter insertion space 250.

[0067] Additionally, a second track groove 253 may be formed on the inner surface of the filter insertion space 250 to guide the axial movement of the first drive protrusion 710 and the second drive protrusion 720. The second track groove 253 is formed in the axial direction and may be recessed radially outward from the inner surface of the filter insertion space 250.

[0068] Oil inlet 220 can be formed between the first-1 track groove 251 and the first-2 track groove 252.

[0069] Furthermore, when the opening / closing door 600 moves to one side to seal the oil inlet 220 and to the other side to open the oil inlet 220, a stop 230 can be formed at a position corresponding to the circumferential end of the opening / closing door 600 to prevent further movement in the sealed state. The stop 230 protrudes radially inward from the inner surface of the filter insertion space 250 and can be formed in the axial direction.

[0070] Figure 4A and Figure 4B These are front and rear perspective views of the opening / closing door 600 of this utility model.

[0071] As illustrated, the opening / closing door 600 can be a plate with an arcuate cross-section to slide along the inner surface of the filter insertion space 250. Additionally, a first track protrusion 610 can be formed on the outer side of the longitudinal direction of the outer peripheral surface of the opening / closing door 600, and a second track protrusion 620 can be formed on the inner side. The first track protrusion 610 and the second track protrusion 620 project radially outward, and when the opening / closing door 600 is positioned on the inner surface of the filter insertion space 250, the first track protrusion 610 inserts into the first-1 track groove 251, and the second track protrusion 620 inserts into the first-2 track groove 252. Therefore, the opening / closing door 600 is configured to move smoothly in the circumferential direction.

[0072] Figure 5 This is a cross-sectional perspective view illustrating a filter housing with an opening / closing door 600 connected according to an embodiment of the present invention, and... Figure 6 This is a perspective cross-sectional view of a filter housing 200 with an open / close door 600 and a sealed oil inlet 220, according to an embodiment of the present invention.

[0073] As illustrated, the open / close door 600 is connected to the inner surface of the filter insertion space 250 to slide circumferentially. Here, the axial outer end of the open / close door 600 has a first track protrusion 610 and a second track protrusion 620; the first track protrusion 610 is inserted into the first-1 track groove 251 to slide circumferentially; the second track protrusion 620 is inserted into the first-2 track groove 252 to slide circumferentially.

[0074] Additionally, such as Figure 5 As shown, when moving to the other side in the circumferential direction, the oil inlet 220 opens; as Figure 6 As shown, the oil inlet 220 is sealed when moved to one side in the circumferential direction. Furthermore, the open / close door 600 is configured to prevent disengagement in one direction while sealing the oil inlet 220 via a stop 230.

[0075] Here, one side in the circumferential direction can be the direction of rotation for releasing the oil filter, and the other side in the circumferential direction can be the direction of rotation for locking the oil filter. Therefore, when the oil filter is rotated to one side in the circumferential direction for removal, the open / close door 600 moves to one side in the circumferential direction together, thereby sealing the oil inlet 220 to prevent oil in the oil flow path 110 from leaking through the oil inlet 220; when the oil filter is rotated to the other side in the circumferential direction for installation, the open / close door 600 moves to the other side in the circumferential direction together, thereby opening the oil inlet 220 to allow oil in the oil flow path 110 to be supplied to the filter insertion space 250.

[0076] Figure 7This is a perspective view illustrating an oil filter 300 including an inlet opening / closing device according to an embodiment of the present invention.

[0077] As shown in the figure, the filter body 310 of the oil filter 300 includes a first drive protrusion 710 and a second drive protrusion 720 to move together with the rotation of the oil filter 300 to open / close the door 600.

[0078] A first drive protrusion 710 is formed around the outer axial circumference of the filter body 310 and can protrude radially outward. The first drive protrusion 710 includes a first-1 drive protrusion 710-1 and a first-2 drive protrusion 710-2; the first-1 drive protrusion 710-1 is formed on one side in the circumferential direction, and the first-2 drive protrusion 710-2 is formed at intervals on the other side in the circumferential direction. During axial movement for installing the oil filter 300, the first drive protrusion 710 is inserted into and moves along the second track groove 253; and after the axial movement is completed, the circumferential end of the open / close door 600 is fitted between the first-1 drive protrusion 710-1 and the first-2 drive protrusion 710-2.

[0079] Therefore, during the rotation of the oil filter 300, the opening / closing door 600, which is fitted between the first-1 drive protrusion 710-1 and the first-2 drive protrusion 710-2, slides circumferentially together. During the rotation of the oil filter 300, the first drive protrusion 710 can be configured to slide within the first-1 track groove 251.

[0080] The second drive protrusion 720 is formed around the axial inner circumference of the filter body 310 and can protrude radially outward. The second drive protrusion 720 includes a second-1 drive protrusion 720-1 and a second-2 drive protrusion 720-2; the second-1 drive protrusion 720-1 is formed on one side in the circumferential direction, and the second-2 drive protrusion 720-2 is formed at a distance on the other side in the circumferential direction. During axial movement for installing the oil filter 300, the second drive protrusion 720 is inserted into and moves along the second track groove 253; and after the axial movement is completed, the circumferential end of the open / close door 600 is fitted between the second-1 drive protrusion 720-1 and the second-2 drive protrusion 720-2.

[0081] Therefore, during the rotation of the oil filter 300, the opening / closing door 600, fitted between the second-1 drive protrusion 720-1 and the second-2 drive protrusion 720-2, slides circumferentially together. During the rotation of the oil filter 300, the second drive protrusion 720 can be configured to slide within the first-2 track groove 252.

[0082] Figure 8This is a cross-sectional perspective view of a filter housing 200 including an outlet opening / closing device 800 according to an embodiment of the present invention.

[0083] As shown in the figure, the filter housing 200 is a cylinder with a filter insertion space 250 formed inside, its inner end is sealed by the housing 100, and its outer end is open. At the inner end of the filter housing 200, the oil discharge pipe 210 can protrude outward in the axial direction at the center; and as described above, the oil discharge pipe 210 is connected to the inlet side of the oil flow path 110 to supply oil filtered by the oil filter 300 from the hollow part of the filter to the oil flow path 110.

[0084] At this time, the outlet opening / closing device 800 is provided at the inlet end of the oil discharge pipe 210 to open or close the inlet end of the oil discharge pipe 210. The outlet opening / closing device 800 is made of rubber material, which seals the oil discharge pipe 210 under normal conditions, and may have a rubber sealing structure that opens under pressure.

[0085] Figure 9 This is a cross-sectional perspective view illustrating an oil filter 300 according to an embodiment of the present invention, and Figure 10 This is a cross-sectional perspective view illustrating the opening / closing mechanism of the outlet opening / closing device 800 caused by the connection between the filter housing 200 and the oil filter 300 according to an embodiment of the present invention.

[0086] As shown in the figure, the oil filter 300 has the following configuration to press and open the outlet opening / closing device 800.

[0087] The oil filter 300 includes a cylindrical filter body 310 and a filter cover 320. The filter cover 320 is located at the outer end of the filter body 310 to seal the opening side of the filter housing 200 and fix the filter body 310 to the filter housing 200. The filter body 310 includes an upper cover 311 formed on its axial inner side and a connecting frame 312 for connecting the upper cover 311 and the filter cover 320. A hollow portion 315 through which an oil discharge pipe 210 passes can be formed on the upper cover 311. At this time, a pressing protrusion 340 can be formed on the connecting frame 312 so that when the oil filter 300 is installed and the oil discharge pipe 210 is inserted into the hollow portion 315 of the upper cover 311, the pressing protrusion 340 presses and opens the outlet opening / closing device 800. The pressing protrusion 340 is located at the axial center of the connecting frame 312, is formed in the axial direction, and its axial outer end can be fixed to the connecting frame 312.

[0088] Therefore, as Figure 9 and Figure 10As shown, when the oil filter 300 is moved inward in the axial direction for installation, the pressing protrusion 340 presses the outlet opening / closing device 800 to open it; when the oil filter 300 is moved outward in the axial direction for removal, the pressing protrusion 340 disengages from the outlet opening / closing device 800, thereby allowing the outlet opening / closing device 800 to seal the oil discharge pipe 210 due to its elasticity.

[0089] The oil-cooled drive motor with the above-described structure according to this utility model has the advantage of preventing oil leakage from the oil flow path to the oil filter insertion space by blocking the oil inlet and oil flow path during oil filter replacement.

[0090] Additionally, the oil-cooled drive motor including an oil filter according to this invention has the advantage of eliminating the need to completely drain the leaked oil before replacing the filter and then replenish the oil afterwards, thereby preventing oil waste, simplifying the filter replacement process and reducing working time.

[0091] Furthermore, the oil-cooled drive motor including an oil filter according to this invention has the advantage of further simplifying the filter replacement process and reducing working time by allowing the oil flow path to open or close together with the rotation of the oil filter during replacement without separate steps or devices.

[0092] The technical concept of this utility model should not be construed as limited to the above-described embodiments. Its application scope is wide, and various modifications can be made by those skilled in the art without departing from the spirit of the utility model claimed in the claims. Therefore, any improvements and modifications that are obvious to those skilled in the art fall within the protection scope of this utility model.

[0093] Cross-references to related applications

[0094] This application claims priority to Korean Patent Application No. 10-2024-0134737, filed on October 4, 2024, the entire contents of which are incorporated herein by reference for all purposes.

Claims

1. An oil-cooled drive motor, the oil-cooled drive motor comprising: A housing containing components, the housing having an oil flow path through which refrigerant flows to cool the components; A filter housing, the filter housing being formed on the housing; as well as A replaceable oil filter, which is interchangeably connected to the filter housing, is provided to filter out foreign matter from the refrigerant. The filter housing is characterized in that it comprises: A filter insertion space, the filter insertion space being configured to permanently accommodate the oil filter; An oil inlet is configured to communicate the filter insertion space with the discharge side of the oil flow path to supply oil to the filter insertion space; An oil discharge pipe, configured to communicate with the inlet side of the oil flow path to return oil filtered by the oil filter to the oil flow path, the oil discharge pipe protruding toward the filter insertion space; and An open / close door is disposed on the inner surface of the filter insertion space. The open / close door is configured to seal the oil inlet by moving to one side in the circumferential direction and to open the oil inlet by moving to the other side in the circumferential direction.

2. The oil-cooled drive motor according to claim 1, characterized in that, The replaceable oil filter is configured to be inserted axially into the filter insertion space and then constrained or released by rotation. The replaceable oil filter includes a cylindrical filter body configured to filter the oil supplied to the filter insertion space as the oil moves radially inward toward a hollow portion of the filter body. The filter body includes a first-1 drive protrusion and a second drive protrusion, the first-1 drive protrusion being formed on one side in the circumferential direction, and the first-2 drive protrusions being spaced apart on the other side. On the side, the first-1 drive protrusion and the first-2 drive protrusion are both formed around the axial outer circumference of the filter body and protrude radially outward. When the replaceable oil filter is inserted into the filter insertion space, the first-1 drive protrusion and the first-2 drive protrusion are configured to assemble the circumferential end of the open / close door between the first-1 drive protrusion and the first-2 drive protrusion, such that during constraint or release, the open / close door reciprocates in the circumferential direction together with the rotation of the replaceable oil filter.

3. The oil-cooled drive motor according to claim 2, characterized in that, The open / close door is configured to open the oil inlet when the replaceable oil filter is constrained, and to seal the oil inlet when the replaceable oil filter is released. The replaceable oil filter is constrained in the filter insertion space by rotating to one side in the circumferential direction, and is released from the filter insertion space by rotating to the other side in the circumferential direction.

4. The oil-cooled drive motor according to claim 2, characterized in that, The inner surface of the filter insertion space includes: A first track groove, the first track groove being radially recessed outward along the circumferential direction, the first track groove being configured to guide the circumferential movement of the first-1 driving protrusion and the first-2 driving protrusion; and The second track groove is radially recessed outward along the axial direction and is configured to guide the axial movement of the first-1 drive protrusion and the first-2 drive protrusion.

5. The oil-cooled drive motor according to claim 4, characterized in that, The open / close door is formed as a plate with an arcuate cross-section, the plate being configured to slide along the inner surface of the filter insertion space, and the open / close door includes a first track protrusion on the outer peripheral surface of the open / close door, the first track protrusion being formed along the circumferential direction and projecting radially outward to insert into the first track groove.

6. The oil-cooled drive motor according to claim 4, characterized in that, The first-1 driving protrusion and the first-2 driving protrusion are formed on the axial outer side of the filter body, and the second-1 driving protrusion and the second-2 driving protrusion are formed at a certain distance inward in the axial direction from the first-1 driving protrusion and the first-2 driving protrusion of the filter body.

7. The oil-cooled drive motor according to claim 2, characterized in that, The filter insertion space includes a radially inwardly projecting stop configured to abut against a circumferential end on one side of the open / close door to prevent further circumferential movement when the open / close door seals the oil inlet.

8. The oil-cooled drive motor according to claim 1, characterized in that, The oil-cooled drive motor also includes an outlet opening / closing device configured to open or close the inlet side of the oil discharge pipe.

9. The oil-cooled drive motor according to claim 8, characterized in that, The oil-cooled drive motor further includes an outlet opening / closing device located at the end of the oil discharge pipe. The outlet opening / closing device is configured to open or close the oil discharge pipe. The outlet opening / closing device includes a rubber seal configured to close the oil discharge pipe under normal conditions and open the oil discharge pipe under pressure. The replaceable oil filter further includes a pressing protrusion configured to press the outlet opening / closing device during axial inward movement for installation and to release the pressure on the outlet opening / closing device during axial outward movement for removal.

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