Built-in separator assembly for an electronic limited slip differential device

Abstract

This invention relates to a built-in separator assembly for an electronic limited-slip differential (eLSD) device, comprising a shift guide, a piston, and a ball ramp operating unit. The shift guide slides to secure the outer and inner housings of the separator device. The piston presses against the multi-plate clutch of the electronic limited-slip differential (eLSD) device, engaging the multi-plate clutch. The ball ramp operating unit rotates via a drive motor and slides the shift guide and piston toward the separator device, wherein the ball ramp operating unit slides the shift guide to secure the separator device and then further rotates at a predetermined angle to slide the piston, thereby engaging the eLSD device in a secured state.

Description

Technical Field

[0001] The present invention relates to a built-in disconnector assembly for an electronic limited slip differential (eLSD) device, which can be used to sequentially operate the disconnector device and the eLSD device for a vehicle using a single actuator. Background Technology

[0002] Since four-wheel drive electric vehicles experience drag losses in the non-drive wheels when driving two wheels or during coasting, a separator device is provided to mechanically disconnect the connection between the non-drive wheels and the motor and reducer.

[0003] The separator device allows electric vehicles to selectively use four wheels and two wheels to reduce unloaded towing losses.

[0004] In addition, a separate electronic limited-slip differential (eLSD) is installed to improve vehicle handling performance and compensate for loss of driving force caused by wheel slippage. When an eLSD is installed, handling and starting performance are improved.

[0005] Both the separator unit and the eLSD unit need to be installed in the vehicle, which increases the vehicle's production cost and weight.

[0006] In particular, when the separator unit and eLSD unit are installed inside the vehicle, a significant amount of space is required, including space for installing the separator unit and eLSD unit, as well as space for installing the actuators used to operate them. Since the actuators are mounted outside the reducer, they require very little space for installation, and it is ideal to use actuators for operating the aforementioned wet multi-plate clutches (e.g., hydraulic actuators or dedicated motors for eLSD units). However, because the actuators are mounted outside the separator or eLSD unit, a considerable amount of space is inevitably required for their installation. Summary of the Invention

[0007] The present invention is provided to solve the above-mentioned problems and aims to provide a built-in separator assembly for an electronic limited-slip differential (eLSD) device, wherein the space required for installation and operation can be minimized by using a single drive motor to sequentially operate the separator device and the eLSD.

[0008] To achieve the above objectives, the built-in separator assembly for an electronic limited-slip differential (eLSD) device according to the present invention includes: a shift guide configured to slide such that the outer and inner housings of the separator device are secured; a piston configured to press a multi-plate clutch such that the multi-plate clutch of the eLSD device is engaged in a secured state; and a ball ramp operating unit rotated by a drive motor to cause the shift guide and piston to slide toward the separator device; wherein the ball ramp operating unit causes the shift guide to slide to secure the separator device, and then further rotates at a predetermined angle to cause the piston to slide, thereby engaging the eLSD device in a secured state.

[0009] The built-in separator assembly further includes: a sleeve that slides via the displacement guide; and a clutch ring that is integral with the sleeve, wherein a spline is formed along the circumference of the clutch ring, the clutch ring rotating integrally with the housing; wherein the housing and the inner housing are secured when the sleeve and the clutch ring move toward the inner housing.

[0010] The inner housing has another spline that engages with the spline of the clutch ring, and the clutch ring engages with the inner housing, thereby engaging the inner housing and the outer housing.

[0011] A guide receiving groove is formed at a predetermined depth along the circumference of the sleeve, and an engagement portion is formed on the inner surface of the displacement guide, the engagement portion being inserted into the guide receiving groove.

[0012] The ball ramp operating unit includes: the drive motor; a fixed ramp that rotates via the drive motor to cause the displacement guide to slide; a movable ramp that slides via the rotation of the fixed ramp and is configured to cause the piston to slide; and a ball located between the fixed ramp and the movable ramp and configured to push the movable ramp by the rotation of the fixed ramp.

[0013] A contoured slot is formed along the circumference of the displacement guide.

[0014] The slot of the displacement guide includes: a first rotating section formed at a predetermined angle in the circumferential direction of the displacement guide and fastening the outer shell and the inner shell from a separated state; an inclined section connected to the first rotating section; and a second rotating section connected to the inclined section, formed in the circumferential direction of the displacement guide such that it is positioned closer to the fixed ramp than the first rotating section, in which a multi-plate clutch is pressed.

[0015] As the fingers of the fixed ramp move in the second rotation section, the fixed ramp pushes the movable ramp to press the multi-plate clutch.

[0016] The fixed ramp has an extension extending toward the displacement guide and a finger formed at the end of the extension and inserted into the slot.

[0017] A driven gear unit is formed at a predetermined angle along the circumference of the fixed ramp, and the driven gear unit meshes with a drive gear unit disposed on the output shaft of the drive motor.

[0018] The fixed ramp has a ball receiving groove formed along the circumference of the fixed ramp on the surface facing the movable ramp, and the movable ramp has another ball receiving groove formed along the circumference of the movable ramp on the surface facing the fixed ramp, which is also formed to receive the ball.

[0019] When the fixed ramp rotates and the ball disengages from one of the two adjacent ball receiving slots, the movable ramp is pushed toward the multi-plate clutch, causing the piston to press against the multi-plate clutch.

[0020] A first connecting portion protruding toward the clutch ring is formed along the circumference of the sleeve, and a second connecting portion protruding toward the sleeve is formed along the circumference of the clutch ring, and the first connecting portion and the second connecting portion are fastened together.

[0021] A through hole is formed in the housing, the first connecting portion and the second connecting portion are fastened after passing through the through hole, and the housing rotates integrally with the sleeve and the clutch ring.

[0022] According to the invention, the built-in separator assembly for an eLSD device having the above configuration, as the clutch ring is inserted into the inner housing, the inner housing and the clutch ring are fastened by splines, thereby securing the separator assembly and thus reducing the overall length and outer diameter of the separator assembly.

[0023] Furthermore, since the direction of movement of the clutch ring is set to be the same as the direction of movement of the piston, the overall length of the separator assembly is further reduced.

[0024] Furthermore, since the eLSD device is secured within a certain time interval after the separator device is secured by the contour of the shift guide, the separator device and the eLSD device will not interfere with each other during operation, thereby improving reliability. Attached Figure Description

[0025] Figure 1This is a cross-sectional view showing a built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0026] Figure 2 This is a perspective view showing a built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0027] Figure 3 This is a perspective view showing a displacement guide in a built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0028] Figure 4A This is a perspective view showing the assembly state of the sleeve and clutch ring in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0029] Figure 4B This is an exploded perspective view showing the sleeve and clutch ring in the built-in separator assembly for an electronic limited-slip differential device according to the present invention, assembled after passing through the housing.

[0030] Figure 5 This is a perspective view showing an assembly of a multi-plate clutch, piston, and ball ramp operating unit in a built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0031] Figure 6 This is a cutaway perspective view showing the main components of the electronic limited-slip differential device in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0032] Figure 7A This is a side view showing the state in which neither the separator device nor the electronic limited-slip differential device is fastened in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0033] Figure 7B This is a cross-sectional view showing the state in which neither the separator device nor the electronic limited-slip differential device is fastened in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0034] Figure 8A This is a side view showing the state in which the separator device is secured and the electronic limited-slip differential device is not secured in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0035] Figure 8B This is a cross-sectional view showing the state in which the separator device is secured and the electronic limited-slip differential device is not secured in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0036] Figure 8C yes Figure 8BEnlarged view of the main components.

[0037] Figure 9A This is a side view showing the state in which both the separator device and the electronic limited-slip differential device are secured in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0038] Figure 9B This is a cross-sectional view showing the state in which both the separator device and the electronic limited-slip differential device are fastened in the built-in separator assembly for an electronic limited-slip differential device according to the present invention.

[0039] Figure 9C yes Figure 9B Enlarged view of the main components. Detailed Implementation

[0040] The built-in separator assembly for an electronic limited-slip differential device according to the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Reference Figure 1 and Figure 2 The built-in disconnector assembly for an electronic limited slip differential (eLSD) device according to the present invention includes: a shift guide 33 that slides to secure the outer shell 11 and inner shell 12 of the disconnector assembly 10; a piston 34 that presses the multi-plate clutch 23 of the electronic limited slip differential (eLSD) device 20 to engage the multi-plate clutch 23; and a ramp operating unit 30 that rotates by a drive motor 31 and slides the shift guide 33 and the piston 34 toward the disconnector assembly 10, wherein the ramp operating unit 30 slides the shift guide 33 to secure the disconnector assembly 10, and then further rotates by a predetermined angle to slide the piston 34, thereby engaging the eLSD device 20.

[0042] The separator device 10 includes a housing 11, an inner housing 12, and an output shaft 13. Rotational force is input from the outside into the housing 11. The inner housing 12 is disposed inside the housing 11, and the output shaft 13 is installed to pass through the housing 11.

[0043] The separator device 10 has a pinion 15 mounted on the output shaft 13 and a half-shaft gear 14 mounted on the inner housing 12, and the pinion 15 meshes with the half-shaft gear 14.

[0044] When the outer shell 11 and the inner shell 12 are not fastened, the rotational force input to the outer shell 11 will not be transmitted to the inner shell 12. However, when the outer shell 11 and the inner shell 12 are engaged, the rotational force input to the outer shell 11 is output to the output shaft 13 through the inner shell 12, the half-shaft gear 14 and the pinion 15.

[0045] The eLSD device 20 is connected to the output shaft 13. A multi-plate clutch 23 is installed in the eLSD device 20 to prevent rotational force from being concentrated on one side of the output shaft 13 in the separator device 10 and not transmitted to the other side.

[0046] The eLSD device 20 includes a multi-plate clutch 23. The multi-plate clutch 23 includes plates spaced apart between discs on the inner surface of the inner housing 12, the discs being spaced apart on the hub 24. When the multi-plate clutch 23 is pressed axially, the discs contact the plates, thus engaging the multi-plate clutch 23, enabling it to transmit power. The engaged multi-plate clutch 23 restricts the rotation of the output shaft 13 mounted inside the eLSD device 20, and the eLSD device 20 enters a locked state. Therefore, rotational force is prevented from being transmitted to only one side in the separator device 10.

[0047] The outer shell 11 and the inner shell 12 are fastened or separated by a sleeve 16 that slides along the axial direction of the output shaft 13.

[0048] like Figure 7B As shown, a first spline 12a is formed on the inner surface of the inner shell 12.

[0049] When the sleeve 16 slides, the inner shell 12 and the outer shell 11 are connected, and the separator device 10 enters a tightened state.

[0050] Since the sleeve 16 is connected to the displacement guide 33 which slides along the axial direction of the output shaft 13, the sleeve 16 also slides along the axial direction of the output shaft 13 when the displacement guide 33 slides.

[0051] When the outer shell 11 and the inner shell 12 are fastened, the sleeve 16 fastens the outer shell 11 and the inner shell 12 through the clutch ring 17.

[0052] The clutch ring 17 has a second spline 17a formed around its outer surface and engaging with the first spline 12a. When the clutch ring 17 slides toward the inner housing 12 via the sleeve 16, the second spline 17a engages with the first spline 12a, thereby securing the clutch ring 17 to the inner housing 12.

[0053] Furthermore, the clutch ring 17 is integrally fastened to the sleeve 16, and the clutch ring 17 and the sleeve 16 are respectively arranged inside and outside the housing 11, so that the clutch ring 17 and the sleeve 16 rotate integrally with the housing 11.

[0054] like Figure 4A As shown, a first connecting portion 16b and a second connecting portion 17b extending toward each other are formed on the sleeve 16 and the clutch ring 17, respectively. Furthermore, the first connecting portion 16b of the sleeve 16 protruding toward the clutch ring 17 is formed along the circumference of the sleeve 16, and the second connecting portion 17b of the clutch ring 17 protruding toward the sleeve 16 is formed along the circumference of the clutch ring 17.

[0055] The first connecting portion 16b and the second connecting portion 17b are fastened by the engaging pin 18, so that the clutch ring 17 and the sleeve 16 are integrated.

[0056] The clutch ring 17 is located inside the housing 11, and the sleeve 16 is located outside the housing 11. A through hole 11a is formed in the housing 11 through which the first connecting portion 16b and the second connecting portion 17b pass. Therefore, when the clutch ring 17 and the sleeve 16 rotate, the first connecting portion 16b and the second connecting portion 17b are engaged in the through hole 11a, and the housing 11 also rotates integrally.

[0057] The ball ramp operating unit 30 engages the clutch ring 17 with the inner housing 12 and operates the multi-plate clutch 23.

[0058] Reference Figure 5 The ball ramp operating unit 30 includes: a drive motor 31; a fixed ramp 32 that rotates via the drive motor 31 and causes the displacement guide 33 to slide; a movable ramp 36 that slides via the rotation of the fixed ramp 32 and causes the piston 34 to slide; and a ball 35 disposed between the fixed ramp 32 and the movable ramp 36 and configured to push the movable ramp 36 via the rotation of the fixed ramp 32, the displacement guide 33 sliding via the fixed ramp 32, and the piston 34 for operating the multi-plate clutch 23 sliding via the movable ramp 36.

[0059] When power is applied, the drive motor 31 rotates. The drive gear unit 31a is formed on the output shaft of the drive motor 31.

[0060] The fixed ramp 32 does not move in the axial direction and rotates in place to allow the displacement guide 33 to slide or push the movable ramp 36.

[0061] Driven gear unit 32a is formed around fixed ramp 32. Driven gear unit 32a meshes with drive gear unit 31a formed on the output shaft of drive motor 31. For example, drive gear unit 31a and driven gear unit 32a may be composed of worm gear and worm wheel.

[0062] Here, the driven gear unit 32a is formed only at a predetermined angle in the circumferential direction of the fixed ramp 32. Therefore, not only can the size of the fixed ramp 32 be reduced, but the fixed ramp 32 can also be allowed to rotate only within the predetermined angle.

[0063] The extension 32c extends from the fixed ramp 32 toward the displacement guide 33.

[0064] A finger 32d is formed at the end of the extension 32c, which engages with the displacement guide 33. The finger 32d is formed to protrude from the end of the extension 32c toward the center of the shaft.

[0065] As the fixed ramp 32 rotates, it causes the displacement guide 33 to move in the axial direction.

[0066] The ball receiving groove 32b of the fixed ramp 32 is formed in one side surface of the fixed ramp 32, that is, on the surface facing the movable ramp 36. The ball receiving groove 32b can be formed as a plurality of ball receiving grooves spaced apart along the circumferential direction of the fixed ramp 32.

[0067] The displacement guide 33 slides axially by rotating the fixed ramp 32. A slot 33a is formed in the displacement guide 33 for inserting the finger 32d.

[0068] The slot 33a has the following profile.

[0069] Reference Figure 6 A first rotating section S1 is formed at a predetermined angle in the circumferential direction of the displacement guide 33, and in this section, the outer shell 11 and the inner shell 12 are fastened from a separated state. An inclined section S2 is formed and connected to the first rotating section S1. Furthermore, a second rotating section S3 is formed and connected to the inclined section S2, and is formed in the circumferential direction of the displacement guide 33 closer to the fixed ramp 32 than the first rotating section S1, and in the second rotating section, the multi-plate clutch is pressed.

[0070] To allow the displacement guide 33 to slide on the sleeve 16, a guide receiving groove 16a is formed at a predetermined depth on the circumference of the sleeve 16, and an engagement portion 33b is formed on the inner surface of the displacement guide 33, which is inserted into the guide receiving groove 16a. By inserting the engagement portion 33b into the guide receiving groove 16a, the displacement guide 33 and the sleeve 16 slide together in the axial direction.

[0071] The movable ramp 36 is arranged on one side surface of the fixed ramp 32, that is, the surface of the fixed ramp 32 facing the housing 11. When the fixed ramp 32 rotates, the movable ramp 36 is pushed by the fixed ramp 32 and slides in the axial direction.

[0072] Another ball receiving groove 36a is formed on the surface of the movable ramp 36 facing the fixed ramp 32.

[0073] Ball 35 is inserted into ball receiving grooves 32b and 36a respectively formed in the fixed ramp 32 and the movable ramp 36. When ball 35 is received in both the ball receiving groove 32b formed in the fixed ramp 32 and the ball receiving groove 36a formed in the movable ramp 36, the fixed ramp 32 and the movable ramp 36 are arranged adjacent to each other. However, when ball 35 disengages from the ball receiving groove 32b formed in the fixed ramp 32 or the ball receiving groove 36a formed in the movable ramp 36 due to rotation of the fixed ramp 32, the displacement of the fixed ramp 32 and the movable ramp 36 is the same as the displacement of ball 35.

[0074] At least one of the ball receiving groove 32b formed in the fixed ramp 32 and the ball receiving groove 36a formed in the movable ramp 36 can be formed at a predetermined angle in the circumferential direction of the fixed ramp 32 or the movable ramp 36. This is because the fixed ramp 32 rotates at the predetermined angle, and then the movable ramp 36 needs to separate from the fixed ramp 32. That is, while the finger 32d is in the first rotating section S1 and the inclined section S2, the fixed ramp 32 and the movable ramp 36 should not separate even if the fixed ramp 32 rotates.

[0075] Piston 34 is arranged to contact movable ramp 36. One end of piston 34 is arranged to contact movable ramp 36, and the other end is arranged at a predetermined distance from multi-plate clutch 23.

[0076] As the movable ramp 36 is pushed and slid by the rotation of the fixed ramp 32, the other end of the piston 34 presses against the multi-plate clutch 23, thereby engaging the multi-plate clutch 23. Simultaneously with the movement of the finger 32d, the fixed ramp 32 pushes the movable ramp 36, causing the piston 34 to press against the multi-plate clutch 23.

[0077] The operation of the built-in separator assembly for an eLSD device having the above configuration according to the present invention will now be described.

[0078] exist Figure 7A , Figure 8A and Figure 9A In the diagram, the position of the finger 32d is indicated by L, and the position of the engagement pin 18 that fastens the sleeve 16 and the clutch ring 17 is indicated by L_1, L_2 or L_3.

[0079] Figure 7A and Figure 7B The separator device 10 and the eLSD device 20 are shown to be in an unsecured state.

[0080] Because the separator assembly 10 is in a loose state, the clutch ring 17 and the inner housing 12 are not engaged. Because the eLSD assembly 20 is also in a loose state, the piston 34 does not press the multi-plate clutch 23.

[0081] When the separator device 10 and the eLSD device 20 are each in a loose state, the engagement pin 18 remains in the initial position L_1.

[0082] Figure 8A and Figure 8B The image shows the separator device 10 being secured while the eLSD device 20 is not secured.

[0083] When the drive motor 31 is running with both the separator device 10 and the eLSD device 20 unsecured, the fixed ramp 32 begins to rotate.

[0084] As the fixed ramp 32 rotates, the finger 32d moves in the first rotating section S1 and then through the inclined section S2. When the finger 32d begins to move in the first rotating section S1, the displacement guide 33 maintains its initial position L_1. However, as the finger 32d passes through the first rotating section S1 and enters the inclined section S2, the displacement guide 33 slides in a direction away from the fixed ramp 32 (from right to left in the figure).

[0085] In this way, as the displacement guide 33 moves away from the fixed ramp 32, the sleeve 16 and the clutch ring 17 also move with the displacement guide 33. That is, the engagement pin 18 moves from L_1 to L_2. Therefore, as the sleeve 16 moves away from the fixed ramp 32, the sleeve 16 engages with the inner housing 12. That is, the first spline 12a and the second spline 17a engage through the movement of the sleeve 16. Therefore, since the sleeve 16 rotates integrally with the outer housing 11, when the first spline 12a and the second spline 17a engage, the outer housing 11 and the inner housing 12 are finally secured, and thus the separator assembly 10 is secured.

[0086] Meanwhile, as the fingers 32d of the fixed ramp 32 move in the first rotating section S1 and the tilting section S2 by the operation of the drive motor 31, the movable ramp 36 is essentially not separated from the fixed ramp 32.

[0087] Figures 9A to 9C The fastened state of the separator device 10 and the eLSD device 20 is shown.

[0088] When the drive motor 31 rotates continuously from the state where only the separator device 10 is tightened, the separator device 10 remains in the tightened state, and the eLSD device 20 also changes from the untightened state to the tightened state.

[0089] Since the finger 32d in the displacement guide 33 has entered the second rotation section S3 from the end of the inclined section S2, the sleeve 16 and the clutch ring 17 remain continuously pushed toward the inner housing 12, and the separator device 10 remains in a fastened state.

[0090] Simultaneously, as the fixed ramp 32 rotates, the ball 35 disengages from the ball receiving groove 32b formed in the fixed ramp 32. When the ball 35 disengages from the ball receiving groove 32b, the ball 35 pushes the movable ramp 36 in a direction away from the fixed ramp 32, causing the movable ramp 36 to slide.

[0091] In this way, as the movable ramp 36 slides away from the fixed ramp 32, the piston 34 slides toward the multi-plate clutch 23 via the sliding of the movable ramp 36. When the piston 34 presses against the multi-plate clutch 23, power can be transmitted through the multi-plate clutch 23, and thus the eLSD device 20 is also secured.

[0092] In this state, the finger 32d moves in the second rotation section S3, causing the displacement guide 33 to not slide the sleeve 16, but the fixed ramp 32 pushes the movable ramp 36, and thus the engagement pin 18 moves to L_3.

[0093] In order to change the separator device 10 and the eLSD device 20 from a fastened state to a loosened state, the drive motor 31 rotates in the opposite direction.

[0094] When the drive motor 31 rotates in the opposite direction, the corresponding process is the opposite of the above process. Therefore, the eLSD device 20 first changes from a fastened state to a loose state, and then the separator device 10 also enters a loose state.

[0095] Although the invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and are not limited to the exemplary embodiments disclosed herein. Therefore, it should be noted that such substitutions or modifications fall within the scope of the claims, and the scope of the invention should be interpreted based on the appended claims.

Claims

1. A built-in separator assembly for an electronic limited-slip differential device, comprising: The displacement guide is configured to slide so that the outer and inner shells of the separator assembly are secured. A piston configured to press a multi-plate clutch, causing the multi-plate clutch to engage. as well as A ball ramp operating unit configured to rotate via a drive motor and configured to slide the displacement guide and the piston toward the separator device; The ball ramp operating unit is configured to slide the displacement guide to secure the separator device, and rotate at a predetermined angle to slide the piston, thereby bringing the electronic limited-slip differential device into a secured state.

2. The built-in separator assembly for an electronic limited-slip differential device according to claim 1, further comprising: A sleeve configured to slide via the displacement guide; and A clutch ring, which is integrally mounted with the sleeve, wherein a spline is formed along the circumference of the clutch ring, and the clutch ring is configured to rotate integrally with the housing; When the sleeve and the clutch ring move toward the inner shell, the outer shell and the inner shell are fastened.

3. The built-in separator assembly for an electronic limited-slip differential device according to claim 2, wherein, The inner housing includes another spline that engages with the spline of the clutch ring, such that the inner housing and the outer housing are engaged.

4. The built-in separator assembly for an electronic limited-slip differential device according to claim 2, wherein: A guide receiving groove is formed at a predetermined depth along the circumference of the sleeve; The inner surface of the displacement guide includes a mating portion that is inserted into the guide receiving groove.

5. The built-in separator assembly for an electronic limited-slip differential device according to claim 1, wherein, The ball ramp operation unit includes: The drive motor; A fixed ramp, configured to rotate via the drive motor, causing the displacement guide to slide; A movable ramp configured to slide by rotation of the fixed ramp, and configured to allow the piston to slide; and A ball, located between the fixed ramp and the movable ramp, is configured to push the movable ramp by rotation of the fixed ramp.

6. The built-in separator assembly for an electronic limited-slip differential device according to claim 5, wherein, A slot with a predetermined profile is formed along the circumference of the displacement guide.

7. The built-in separator assembly for an electronic limited-slip differential device according to claim 6, wherein, The predetermined contour of the slot of the displacement guide includes: A first rotating section is formed at a predetermined angle in the circumferential direction of the displacement guide and is configured to secure the outer shell and the inner shell; An inclined section, which connects to the first rotating section; and A second rotating section, connected to the inclined section, is formed in the circumferential direction of the displacement guide and positioned closer to the fixed ramp than the first rotating section, in which a multi-plate clutch is pressed.

8. The built-in separator assembly for an electronic limited-slip differential device according to claim 7, wherein, As the fingers of the fixed ramp move in the second rotation section, the fixed ramp pushes the movable ramp to press the multi-plate clutch.

9. The built-in separator assembly for an electronic limited-slip differential device according to claim 6, wherein, The fixed ramp includes: An extension that extends toward the displacement guide; and A finger-like object formed at the end of the extension and configured to be inserted into the slot.

10. The built-in separator assembly for an electronic limited-slip differential device according to claim 5, wherein: A driven gear unit is formed at a predetermined angle along the circumference of the fixed ramp. The driven gear unit meshes with the drive gear unit located on the output shaft of the drive motor.

11. The built-in separator assembly for an electronic limited-slip differential device according to claim 5, wherein: The surface of the fixed ramp facing the movable ramp includes a first ball receiving groove configured to receive the ball along the circumference of the fixed ramp; The surface of the movable ramp facing the fixed ramp includes a second ball receiving groove configured to receive the ball along the circumference of the movable ramp.

12. The built-in separator assembly for an electronic limited-slip differential device according to claim 11, wherein, When the fixed ramp rotates and the ball disengages from either the first or second ball receiving slot, the movable ramp is pushed toward the multi-plate clutch, causing the piston to press against the multi-plate clutch.

13. The built-in separator assembly for an electronic limited-slip differential device according to claim 2, wherein: A first connecting portion protruding toward the clutch ring is formed on the sleeve along the circumference of the sleeve; A second connecting portion protruding toward the sleeve is formed along the circumference of the clutch ring; The first connecting portion and the second connecting portion are fastened together.

14. The built-in separator assembly for an electronic limited-slip differential device according to claim 13, wherein, The housing includes a through hole, through which the first connecting portion and the second connecting portion are fastened, and the housing is configured to rotate integrally with the sleeve and the clutch ring.

15. An electronic limited-slip differential device, comprising: A separator device having a built-in separator assembly, the built-in separator assembly comprising: A displacement guide configured to secure the outer casing of the separator device to the inner casing of the separator device; Piston, configured to operate a multi-plate clutch; and A ball ramp operating unit includes a drive motor configured to rotate the ball ramp operating unit, wherein the ball ramp operating unit is configured to slide the displacement guide and the piston toward the separator device; The ball ramp operating unit is configured to slide the displacement guide to secure the separator device, and to rotate it at a predetermined angle to slide the piston, thereby securing the electronic limited-slip differential device.

16. The electronic limited-slip differential device according to claim 15, wherein, The ball ramp operating unit further includes: A fixed ramp, configured to rotate via the drive motor, thereby operating the displacement guide; A movable ramp configured to slide via rotation of the fixed ramp, and configured to operate the piston; and A ball is positioned between the fixed ramp and the movable ramp, wherein the ball is configured to push the movable ramp by rotation of the fixed ramp.

17. The electronic limited-slip differential device according to claim 16, wherein, A slot is formed along the circumference of the displacement guide.

18. The electronic limited-slip differential device according to claim 17, wherein, The slot of the displacement guide includes: A first rotating section is formed at a predetermined angle in the circumferential direction of the displacement guide and configured to fasten the outer shell to the inner shell; An inclined section, which connects to the first rotating section; and A second rotating section, which is connected to the inclined section and formed in the circumferential direction of the displacement guide, is positioned closer to the fixed ramp than the first rotating section, in which a multi-plate clutch is pressed.

19. The electronic limited-slip differential device according to claim 16, wherein: The surface of the fixed ramp facing the movable ramp includes a first ball receiving groove configured to receive the ball along the circumference of the fixed ramp; The surface of the movable ramp facing the fixed ramp includes a second ball receiving groove configured to receive the ball along the circumference of the movable ramp.

20. The electronic limited-slip differential device according to claim 15, wherein, The built-in separator assembly further includes: A sleeve configured to operate via the displacement guide; and A clutch ring, which is integrally mounted with the sleeve, wherein a spline is formed along the circumference of the clutch ring, and the clutch ring is configured to rotate integrally with the housing; When the sleeve and the clutch ring move toward the inner shell, the outer shell and the inner shell are fastened.

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