Disconnecting device with limited slip differential function

Abstract

The invention relates to a disconnecting device with a limited slip differential function, and the device comprises a housing; a first pressure ring and a second pressure ring provided on both sides of the housing so as to face each other with a gap therebetween, the first pressure ring and the second pressure ring having a first claw portion on an outer diameter portion; and a clutch ring coupled to an outer diameter portion of the housing and connected to a sleeve operated by driving of an actuator device, the clutch ring moving in a meshing direction when the sleeve is operated by the actuator device, and the clutch ring being engaged with the sleeve while moving in the meshing direction when the sleeve is operated by the actuator device. A second claw portion provided on an inner diameter portion of an end portion on one side inside the housing is engaged with the first claw portions of the first pressure ring and the second pressure ring, thereby achieving four-wheel drive.

Description

Technical Field

[0001] The invention relates to a disconnect device with limited slip differential function. Background Art

[0002] Generally, the disconnect device is a device that switches power between two-wheel drive (2WD) and four-wheel drive (4WD) according to driving conditions, thereby minimizing unnecessary power loss.

[0003] The Limited Slip Differential (LSD) is a device that limits the differential speed by friction when the left and right drive wheels rotate relative to each other. When one drive wheel is stuck in a muddy road or a puddle, the Limited Slip Differential (LSD) transmits force to the other drive wheel, making it easier for the other drive wheel to disengage, or prevents the wheels from slipping when turning, thereby improving driving safety.

[0004] However, a device integrating the disconnect function and the limited slip differential function has not yet been developed.

[0005] Prior art documents

[0006] Patent Documents

[0007] (Patent Document 1) Korean Patent Publication No. 10-2006-0066806 (published on June 19, 2006) Summary of the invention

[0008] In order to solve the above-mentioned problems, the purpose of the present invention is to provide a disconnect device with limited slip differential function that can realize power switching from two-wheel drive to four-wheel drive, and when a rotational resistance difference occurs between the two drive wheels during vehicle driving, the friction force of the friction member acts on the half-shaft gears on both sides to realize limited slip differential.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a disconnect device with limited slip differential function, which includes: a housing; a first pressure ring and a second pressure ring, which are arranged on both sides of the housing at a distance from each other and have a first claw portion on the outer diameter portion; and a clutch ring, which is connected to the outer diameter portion of the housing and is connected to a sleeve that is actuated by an actuator device. When the sleeve is actuated by the actuator device, it moves in the meshing direction, and the second claw portion arranged on the inner diameter portion of one side end portion located inside the housing meshes with the first claw portions of the first pressure ring and the second pressure ring, thereby realizing four-wheel drive.

[0010] Furthermore, preferably, the second claw portions are provided on both sides of the inner diameter portion of one end portion of the clutch ring.

[0011] Furthermore, preferably, a pinion gear and side gears on both sides meshing with the pinion gear are provided inside the first pressure ring and the second pressure ring, and the pinion gear is rotatably connected to a pinion shaft provided between the side gears on both sides.

[0012] Furthermore, preferably, a cam portion is provided at an end portion of the pinion shaft, and the cam portion passes through the pinion and is inserted into a cam groove provided on the first pressure ring and the second pressure ring.

[0013] In addition, preferably, the first pressure ring and the second pressure ring are arranged between friction members provided on both sides of the interior of the housing, and the friction members on both sides are connected to the outer sides of the side gears on both sides.

[0014] Furthermore, preferably, the friction member is a multi-plate clutch.

[0015] In addition, preferably, when a preset rotational resistance difference is generated between the driving wheels on both sides during driving of the vehicle, a relative rotational torque is generated between the pinion shaft and the housing, whereby, as the cam portion inserted into the cam groove moves in the direction of the limited slip differential, the pressure rings on both sides are pushed in the direction of the friction members on both sides and press the friction members on both sides, so that the friction force of the friction members on both sides acts on the half-shaft gears on both sides to achieve a limited slip differential state.

[0016] The present invention can realize power switching from two-wheel drive to four-wheel drive.

[0017] In addition, according to the present invention, when a rotation resistance difference occurs between the driving wheels on both sides during the vehicle running, the friction force of the friction member can be used to act on the half-shaft gears on both sides to realize the limited slip differential.

[0018] In addition, the present invention not only improves the fuel efficiency of the electric vehicle through the disconnector function, but also applies a multi-plate clutch limited slip differential to perform the limited slip differential function during high-speed cornering, thereby ensuring driving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view of a disconnect device with limited slip differential function according to a preferred embodiment of the present invention.

[0020] Figure 2 It is a partially cutaway stereoscopic view of a disconnect device with limited slip differential function according to a preferred embodiment of the present invention.

[0021] Figure 3 It is a side sectional view of a disconnect device with limited slip differential function according to a preferred embodiment of the present invention.

[0022] Figure 41 is a diagram showing a state in which a cam portion provided at an end portion of a pinion shaft according to a preferred embodiment of the present invention is inserted into a cam groove provided on pressure rings on both sides.

[0023] Figure 5 1 is a diagram showing a state in which the first claws of the double-sided pressure ring engage with the second claws of the clutch ring according to a preferred embodiment of the present invention.

[0024] In the figure:

[0025] 10: housing, 21: first pressure ring, 211: first claw portion, 212: cam groove, 22: second pressure ring, 221: first claw portion, 222: cam groove, 30: clutch ring, 32: second claw portion, 40: pinion, 51: one side axle gear, 52: other side axle gear, 60: pinion shaft, 61: cam portion, 70: friction member, 80: actuator device, 81: shift fork, 90: sleeve, S: spacer DETAILED DESCRIPTION

[0026] Below, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that when marking the components of each drawing, the same components should be marked with the same reference numerals as much as possible even in different drawings. In addition, when describing the present invention, if it is determined that the specific description of the relevant known structure or function will make the gist of the present invention unclear, the detailed description will be omitted. In addition, although the following describes a preferred embodiment of the present invention, the technical concept of the present invention is not limited to or restricted thereto, and can be modified and implemented in various ways by ordinary technicians in the field.

[0027] Figure 1 is a perspective view of a disconnect device with limited slip differential function according to a preferred embodiment of the present invention, Figure 2 is a partially cutaway perspective view of a disconnect device with a limited slip differential function according to a preferred embodiment of the present invention, Figure 3 is a side cross-sectional view of a disconnect device with limited slip differential function according to a preferred embodiment of the present invention, Figure 4 1 is a diagram showing a state in which a cam portion provided at an end portion of a pinion shaft according to a preferred embodiment of the present invention is inserted into a cam groove provided at pressure rings on both sides.

[0028] like Figures 1 to 4 As shown, the present invention may include a disconnect device and a multi-plate clutch limited slip differential (mLSD).

[0029] The disconnect device may include the clutch ring 30 and the actuator device 80 .

[0030] The multi-plate clutch limited slip differential may include: a first pressure ring 21 and a second pressure ring 22 , a pinion shaft 60 , and a friction member 70 .

[0031] The present invention may include a housing 10, first and second pressure rings 21 and 22, and a clutch ring 30. The housing 10 may be configured as a split type.

[0032] The first pressure ring 21 and the second pressure ring 22 may be disposed opposite to each other at both sides of the housing 10 with a gap S therebetween. The first pressure ring 21 and the second pressure ring 22 may include first claw portions 211 and 221 at their outer diameter portions.

[0033] The first pressure ring 21 and the second pressure ring 22 may include a pinion gear 40 and differential gears such as side gears.

[0034] The clutch ring 30 may be connected to a sleeve 90. The sleeve 90 may be connected to the actuator device 80 via a shift fork 81.

[0035] By operating the actuator device 80 , the sleeve 90 coupled to the exterior of the housing 10 may be moved along the housing 10 in an engaging direction.

[0036] When the sleeve 90 moves, the clutch ring 30 connected to the sleeve 90 may move in the engagement direction.

[0037] The clutch ring 30 may include second claw portions 32 on both sides of the inner diameter portion of one end portion facing the first pressure ring 21 and the second pressure ring 22 .

[0038] When the clutch ring 30 is engaged, the second claw portion 32 can be engaged with the first claw portions 211 and 221 respectively provided on the first pressure ring 21 and the second pressure ring 22. Thus, four-wheel drive can be achieved.

[0039] One end of the clutch ring 20 facing the first pressure ring 21 and the second pressure ring 22 is located inside the housing 10 , and the other end facing the sleeve 90 passes through the housing 10 and is connected to the sleeve 90 located outside the housing 10 .

[0040] The side gears 51 on one side and the side gear 52 on the other side disposed on the left and right sides inside the first pressure ring 21 and the second pressure ring 22 may mesh with the pinion gear 40 .

[0041] The pinion gear 40 may be rotatably coupled to a pinion shaft 60 disposed between the one side side gear 51 and the other side side gear 52 .

[0042] The pinion shaft 60 may be provided with a cam portion 61 at its end. The cam portion 61 may pass through the pinion 40 and be inserted into the cam grooves 212 and 222 provided on the first pressure ring 21 and the second pressure ring 22 .

[0043] The cam portion 61 may be configured in a shape such as “◇”. The cam grooves 212 , 222 may be configured in a shape such as “<>”.

[0044] The first pressure ring 21 and the second pressure ring 22 may be disposed between friction members 70 disposed on both sides of the housing 10. The friction members 70 on both sides may be coupled to the outer sides of the side gears 51 and 52 on one side. For example, the friction member 70 may be a multi-plate clutch.

[0045] Through the pressing of the first pressure ring 21 and the second pressure ring 22 , the friction force of the friction members 70 on both sides acts on the side gears 51 on one side and the side gears 52 on the other side, thereby realizing a limited slip differential.

[0046] The side gear 51 on one side may be connected to a driving wheel on one side (not shown), and the side gear 52 on the other side may be connected to a driving wheel on the other side (not shown).

[0047] Next, the operation of the clutch ring of the present invention will be described.

[0048] Figure 5 1 is a diagram showing a state in which the second claw portion of the clutch ring according to a preferred embodiment of the present invention is engaged with the first claw portions of the pressure rings on both sides.

[0049] like Figure 5 As shown, in the two-wheel drive state where the engagement between the first claw portions 211, 221 of the first pressure ring 21 and the second pressure ring 22 and the second claw portion 32 of the clutch ring 30 is released, the four-wheel drive state can be achieved when the second claw portions 21 of the clutch ring 30 arranged on both sides of the inner diameter portion of the first pressure ring 21 and the second pressure ring 22 engage with the first claw portions 211 of the first pressure ring 21 and the second pressure ring 22.

[0050] Specifically, by operating the actuator device 80 , the sleeve 90 connected to the fork 81 may be moved along the housing 10 in the engagement direction.

[0051] When the clutch ring 30 connected to the sleeve 90 moves in the meshing direction by the movement of the sleeve 90, the second claw portion 32 of the clutch ring 30 can mesh with the first claw portions 211 and 221 of the first and second pressure rings 21. Thus, four-wheel drive can be achieved.

[0052] For example, in a four-wheel drive state, the power of a driving motor (not shown) may be transmitted to the housing 10 via a ring gear (not shown) coupled to the outside of the housing 10 .

[0053] Next, the limited slip differential operation of the present invention will be described.

[0054] Reference Figures 3 to 5 When a rotational resistance difference occurs between the driving wheels on both sides (not shown) during the vehicle running, a relative rotational torque may occur between the pinion shaft 60 and the housing 10 .

[0055] When the cam portion 61 inserted into the cam grooves 212 and 222 moves in the limited slip differential direction F due to the relative rotation torque, the interval S between the first pressure ring 21 and the second pressure ring 22 widens. At this time, the first pressure ring 21 and the second pressure ring 22 are pushed toward the friction members 70 on both sides, and press the friction members 70 on both sides.

[0056] When the friction members 70 on both sides are compressed by the pressure of the first pressure ring 21 and the second pressure ring 22 , the friction force of the friction members 70 on both sides acts on the side gear 51 on one side and the side gear 52 on the other side. Thus, a limited slip differential state can be achieved.

[0057] In the present invention, when the left and right driving wheels (not shown) rotate relative to each other, the friction force of the friction members 70 on both sides acts on the side gear 51 on one side and the side gear 52 on the other side to limit the differential speed of the two driving wheels (not shown) connected to the two driving wheels on both sides, so that even if one driving wheel is stuck in a dangerous place such as a muddy road or a puddle, the power can be transmitted to the other driving wheel to easily escape from the dangerous place. In addition, when driving on a curved road, rainy road, or snowy road, the differential speed of the left and right driving wheels (not shown) can be limited to ensure driving stability.

[0058] The present invention may be applied to electric vehicles, such as dual-motor full-time four-wheel drive (full-time 4WD) electric vehicles (EV).

[0059] It can be seen that the present invention can realize the power switching from two-wheel drive (2WD) to four-wheel drive (4WD). In addition, in the present invention, when there is a difference in rotational resistance between the driving wheels on both sides when the vehicle is running, the limited slip differential can be realized by applying the friction force of the friction member to the half-shaft gears on both sides. In addition, the present invention not only improves the fuel efficiency of the electric vehicle through the disconnector function, but also applies a multi-plate clutch limited slip differential to perform the limited slip differential function when turning at high speed, thereby ensuring driving stability.

[0060] The above description is only used to exemplify the technical spirit of the present invention, and ordinary technicians in the field to which the present invention belongs can make various modifications, changes and substitutions without departing from the essential features of the present invention. Therefore, the embodiments and drawings disclosed in the present invention are not intended to limit but to illustrate the technical spirit of the present invention, and the scope of the technical spirit of the present invention should not be limited by the above embodiments and drawings. The scope of protection of the present invention should be interpreted by the scope of the attached claims, and it should be interpreted that all technical ideas within the scope equivalent to them should be included in the scope of the claims of the present invention.

Claims

1. A disconnect device with limited slip differential function, wherein: include: case; A first pressure ring and a second pressure ring are disposed on opposite sides of the housing at a distance from each other and have first claws on their outer diameters; and The clutch ring is connected to the outer diameter portion of the shell and is connected to a sleeve that is actuated by the drive of an actuator device. When the sleeve is actuated by the actuator device, it moves in the engagement direction and a second claw portion arranged on the inner diameter portion of one side end portion located inside the shell engages with the first claw portions of the first pressure ring and the second pressure ring, thereby realizing four-wheel drive.

2. The disconnect device with limited slip differential function according to claim 1, wherein: The second claw portions are provided on both sides of the inner diameter portion of one end portion of the clutch ring.

3. The disconnect device with limited slip differential function according to claim 1, wherein: A pinion gear and side gears on both sides meshing with the pinion gear are provided inside the first pressure ring and the second pressure ring, and the pinion gear is rotatably connected to a pinion shaft provided between the side gears on both sides.

4. The disconnect device with limited slip differential function according to claim 3, wherein: A cam portion is provided at an end portion of the pinion shaft. The cam portion passes through the pinion and is inserted into a cam groove provided on the first pressure ring and the second pressure ring.

5. The disconnect device with limited slip differential function according to claim 4, wherein: The first pressure ring and the second pressure ring are arranged between friction members provided on both sides of the housing, and the friction members on both sides are connected to the outer sides of the side gears on both sides.

6. The disconnect device with limited slip differential function according to claim 5, wherein: The friction member is a multi-plate clutch.

7. The disconnect device with limited slip differential function according to claim 5, wherein: When a preset rotational resistance difference is generated between the driving wheels on both sides during vehicle driving, a relative rotational torque is generated between the pinion shaft and the housing. As a result, as the cam portion inserted into the cam groove moves in the direction of the limited slip differential, the pressure rings on both sides are pushed in the direction of the friction members on both sides and press the friction members on both sides. As a result, the friction force of the friction members on both sides acts on the half-shaft gears on both sides to achieve a limited slip differential state.

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