Disconnector apparatus with limited slip differential function

Abstract

To provide a disconnector apparatus with a limited slip differential function, which enables switching of power between two-wheel drive and four-wheel drive, and performs differential limitation through the action of frictional force of a friction member on both side gears when a rotational resistance difference in both drive wheels occurs during vehicle travel.SOLUTION: A disconnector apparatus includes: a casing; first and second pressure rings provided at two opposite sides while opposing each other at an interval in the casing and having first dog portions provided on outer-diameter portions thereof; and a clutch ring coupled to an outer-diameter portion of the casing and connected to a sleeve configured to be operated by an operation of an actuator device, in which the clutch ring moves in a meshing direction when the sleeve is operated by the actuator device, such that second dog portions provided on an inner-diameter portion of one end positioned in the casing mesh with first dog portions of the first and second pressure rings, such that four-wheel drive is implemented.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a disconnector device including a limited slip differential function. [Background technology]

[0002] In general, a disconnector device is a device that can minimize unnecessary power loss by switching power between two-wheel drive (2WD) and four-wheel drive (4WD) depending on driving conditions.

[0003] A limited slip differential (LSD) is a device that limits the differential movement by friction when a relative rotational movement occurs between the left and right driving wheels. When one driving wheel falls into a muddy road or a puddle, the limited slip differential (LSD) transmits force to the other driving wheel to allow it to easily escape, or prevents wheel slippage when driving around a corner, ensuring driving safety.

[0004] However, a device that combines a disconnector function and a differential limiting function has not yet been developed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Republic of Korea Patent Publication No. 10-2006-0066806 (Published on June 19, 2006) Summary of the Invention [Problem to be solved by the invention]

[0006] In order to solve the above-mentioned problems, the present invention aims to provide a disconnector device including a differential limiting function, which is capable of switching power from two-wheel drive to four-wheel drive, and in the event that a difference in rotational resistance occurs between the drive wheels on both sides while the vehicle is traveling, the frictional force of the friction members acts on the side gears on both sides to limit the differential. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present invention provides a disconnector device with a differential limiting function, which includes a case; first and second pressure rings which are arranged on both sides facing each other with a gap between them inside the case and have first dog portions on their outer diameter portions; and a clutch ring which is coupled to the outer diameter portion of the case and connected to a sleeve which is operated by driving an actuator device, and which moves in an engagement direction when the actuator device operates the sleeve, thereby causing a second dog portion which is arranged on an inner diameter portion of one side end located inside the case to engage with the first dog portions of the first and second pressure rings, thereby achieving four-wheel drive.

[0008] The second dog portions may be provided on both sides of an inner diameter portion of one end portion of the clutch ring.

[0009] Also, a pinion gear and both side gears meshing with the pinion gear may be provided inside the first and second pressure rings, and the pinion gear may be rotatably coupled to a pinion shaft disposed between the both side gears.

[0010] Also, a cam portion may be provided at an end of the pinion shaft, and the cam portion may pass through the pinion gear and be inserted into cam grooves provided in the first and second pressure rings.

[0011] Also, the first and second pressure rings may be disposed between friction members provided on both sides inside the case, and the friction members on both sides may be coupled to the outsides of the side gears on both sides.

[0012] The friction member may be a multi-plate clutch.

[0013] In addition, when a rotational resistance difference set between the drive wheels on both sides occurs while the vehicle is traveling, a relative rotational torque is generated between the pinion shaft and the case, and as a result, the cam portion inserted into the cam groove moves in the differential limiting direction, and the pressure rings on both sides are pushed toward the friction members on both sides to pressurize the friction members on both sides, so that the frictional force of the friction members on both sides acts on the side gears on both sides, resulting in a differential limiting state. Effect of the Invention

[0014] The present invention is capable of power switching from two-wheel drive (2WD) to four-wheel drive (4WD).

[0015] In addition, in the present invention, when a difference in rotational resistance occurs between the drive wheels on both sides while the vehicle is running, the frictional force of the friction members acts on the side gears on both sides, thereby limiting the differential.

[0016] In addition, the present invention not only improves the fuel economy of electric vehicles through the disconnector function, but also ensures driving stability by applying a multi-plate clutch limited slip differential (mLSD) and performing a differential limiting function during high-speed cornering. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a disconnector device including a limited slip differential feature according to a preferred embodiment of the present invention. [Diagram 2] 1 is a partially cut-away perspective view of a disconnector device including a limited slip differential feature according to one preferred embodiment of the present invention; FIG. [Diagram 3] 1 is a side cross-sectional view of a disconnector device including a limited slip differential feature according to a preferred embodiment of the present invention; [Figure 4]13 is a view showing a state in which a cam portion provided at an end of a pinion shaft according to a preferred embodiment of the present invention is inserted into a cam groove provided in a pressure ring on both sides. FIG. [Diagram 5] 13 is a view showing a state in which the second dog portion of the clutch ring is engaged with the first dog portion of the double-sided compression ring according to a preferred embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, when referring to the components in each drawing, it should be noted that the same components are referred to by the same reference numerals as much as possible when they are displayed in other drawings. In addition, when describing the present invention, if a detailed description of related known configurations or functions is determined to make the gist of the present invention unclear, the detailed description will be omitted. In addition, although a preferred embodiment of the present invention will be described below, the technical idea of ​​the present invention is not limited or restricted thereto, and can be modified and variously implemented by those skilled in the art.

[0019] FIG. 1 is an oblique view of a disconnector device including a differential limiting function according to a preferred embodiment of the present invention, FIG. 2 is a partially cutaway oblique view of a disconnector device including a differential limiting function according to a preferred embodiment of the present invention, FIG. 3 is a side cross-sectional view of a disconnector device including a differential limiting function according to a preferred embodiment of the present invention, and FIG. 4 is a diagram showing a state in which a cam portion provided at the end of a pinion shaft according to a preferred embodiment of the present invention is inserted into a cam groove provided in a pressure ring on both sides.

[0020] As shown in FIGS. 1 to 4, the present invention can include a disconnector device and a multi-plate clutch limited slip differential (mLSD).

[0021] The disconnector device may include a clutch ring 30 and an actuator device 80 .

[0022] The multi-plate clutch limited slip differential (mLSD) can include first and second pressure rings 21, 22, a pinion shaft 60, and a friction member 70.

[0023] The present invention can include a case 10, first and second pressure rings 21, 22, and a clutch ring 30. The case 10 can be configured as a separate type.

[0024] The first and second compression rings 21 and 22 may be provided on both sides facing each other with a gap S therebetween inside the case 10. The first and second compression rings 21 and 22 may have first dog portions 211 and 221 provided on outer peripheries thereof.

[0025] A differential gear such as a pinion gear 40 or a side gear may be provided inside the first and second pressure rings 21 and 22.

[0026] The clutch ring 30 may be coupled to a sleeve 90. The sleeve 90 may be coupled to an actuator device 80 by a fork 81.

[0027] By operating the actuator device 80, a sleeve 90 coupled to the outside of the case 10 can move along the case 10 in the mating direction.

[0028] The movement of the sleeve 90 allows the clutch ring 30 connected to the sleeve 90 to move in the meshing direction.

[0029] The clutch ring 30 may have second dog portions 32 on both sides of an inner diameter portion of one end portion facing the first and second compression rings 21 and 22 .

[0030] The second dog portion 32 may be engaged with the first dog portions 211 and 221 provided on the first and second pressure rings 21 and 22, respectively, during engagement of the clutch ring 30. Thus, four-wheel drive may be achieved.

[0031] One end of the clutch ring 30 facing the first and second compression rings 21 and 22 is located inside the case 10, and the other end facing the sleeve 90 passes through the case 10 and can be connected to the sleeve 90 located outside the case 10.

[0032] Both side gears, ie, one side gear 51 and the other side gear 52 provided on both the left and right sides inside the first and second pressure rings 21 and 22, can be meshed with the pinion gear 40.

[0033] The pinion gear 40 may be rotatably coupled to a pinion shaft 60 disposed between a side gear 51 on one side and a side gear 52 on the other side.

[0034] A cam portion 61 may be provided at the end of the pinion shaft 60. The cam portion 61 may pass through the pinion gear 40 and be inserted into the cam grooves 212, 222 provided in the first and second pressure rings 21, 22.

[0035] The cam portion 61 may have a shape like "◇". The cam grooves 212, 222 may have a shape like "<>".

[0036] The first and second pressure rings 21 and 22 may be disposed between friction members 70 provided on both sides inside the case 10. The friction members 70 on both sides may be coupled to the outside of the one-side side gear 51 and the other-side side gear 52. For example, the friction members 70 may be a multi-plate clutch.

[0037] When the first and second compression rings 21 and 22 are pressed, the frictional force of the friction members 70 acts on the one side gear 51 and the other side gear 52, thereby limiting the differential.

[0038] The one side gear 51 may be connected to a driving wheel on one side (not shown), and the other side gear 52 may be connected to a driving wheel on the other side (not shown).

[0039] Next, the operation of the clutch ring of the present invention will be described.

[0040] FIG. 5 is a diagram showing a state in which the second dog portion of the clutch ring is engaged with the first dog portion of the double-sided compression ring according to a preferred embodiment of the present invention.

[0041] As shown in FIG. 5, in a two-wheel drive state in which the first dog portions 211, 221 of the first and second compression rings 21, 22 and the second dog portion 32 of the clutch ring 30 are disengaged, when the first dog portions 211, 221 of the first and second compression rings 21, 22 are engaged with the second dog portions 32 provided on both sides of the inner diameter portion of the clutch ring 30 facing the first and second compression rings 21, 22, a four-wheel drive state can be achieved.

[0042] Specifically, by operating the actuator device 80, a sleeve 90 connected to the fork 81 can move along the case 10 in the meshing direction.

[0043] As the sleeve 90 moves, the clutch ring 30 connected to the sleeve 90 moves in the meshing direction, so that the second dog portion 32 of the clutch ring 30 can mesh with the first dog portions 211 and 221 of the first and second compression rings 21 and 22. This allows four-wheel drive.

[0044] For example, in a four-wheel drive state, the power of a drive motor (not shown) can be transmitted to the case 10 via a ring gear (not shown) coupled to the outside of the case 10 .

[0045] Next, the differential limiting operation of the present invention will be described.

[0046] As shown in FIGS. 3 to 5, when a difference in rotational resistance occurs between drive wheels on both sides (not shown) while the vehicle is traveling, a relative rotational torque can be generated between pinion shaft 60 and case 10.

[0047] Due to the generation of relative rotational torque, the cam portion 61 inserted into the cam grooves 212, 222 moves in the differential limiting direction F, thereby further widening the gap S between the first and second compression rings 21, 22. The first and second compression rings 21, 22 are pushed toward the both-side friction members 70, thereby applying pressure to the both-side friction members 70.

[0048] The friction members 70 on both sides are compressed by the pressure applied by the first and second compression rings 21 and 22, so that the friction force of the friction members 70 on both sides acts on the one side gear 51 and the other side gear 52. This allows a differential limiting state to be established.

[0049] In the present invention, when a relative rotational motion occurs between the left and right driving wheels (not shown), the frictional force of the friction members 70 on both sides acts on the one side side gear 51 and the other side side gear 52, and the differential movement of the driving wheels (not shown) connected to the driving wheels on both sides is restricted, so that even if the driving wheel on one side falls into a rough road such as a muddy road or a puddle, the force can be transmitted to the driving wheel on the other side, and the vehicle can easily escape the rough road. In addition, when driving on a corner, a rainy road, or a snowy road, the differential movement of the driving wheels on both sides (not shown) is restricted, thereby ensuring driving stability.

[0050] The present invention can be applied to electric vehicles such as dual motor type full-time 4WD electric vehicles (EVs).

[0051] As described above, the present invention can switch power from two-wheel drive (2WD) to four-wheel drive (4WD). In addition, when a difference in rotational resistance occurs between the drive wheels on both sides while the vehicle is running, the frictional force of the friction members acts on the side gears on both sides to limit the differential. In addition, the present invention can improve the electric fuel economy of an electric vehicle by using a disconnector function, and can ensure running stability by applying a multi-plate clutch limited slip differential (mLSD) to perform the differential limiting function during high-speed cornering.

[0052] The above description is merely illustrative of the technical idea of ​​the present invention, and various modifications, changes, and substitutions are possible within the scope of the essential characteristics of the present invention if one has ordinary knowledge in the technical field to which the present invention belongs. Therefore, the embodiments and accompanying drawings disclosed in the present invention are for the purpose of explanation, not for the purpose of limiting the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by such embodiments and accompanying drawings. The scope of protection of the present invention should be interpreted according to the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0053] 10. Case 21 First pressure ring 211 1st Dock 212 Cam groove 22 Second pressure ring 221 1st Dock 222 Cam groove 30 ···Clutch ring 32 2nd dog section 40 Pinion gear 51 One side gear 52 Other side gear 60 Pinion shaft 61 Cam section 70 Friction member 80 Actuator device 81 ···Fork 90 Sleeve S Interval

Claims

1. case; first and second pressure rings disposed on opposite sides of the case at a distance therebetween, the first and second pressure rings having first dog portions on their outer peripheries; and a clutch ring which is coupled to an outer diameter portion of the case and is connected to a sleeve which is actuated by an actuator device, and which moves in an engagement direction when the sleeve is actuated by the actuator device, so that a second dog portion provided on an inner diameter portion of one side end located inside the case engages with the first dog portions of the first and second pressure rings to perform four-wheel drive; A disconnector device including a differential limiting function.

2. The second dog portion is 2. The disconnector device including a differential limiting function according to claim 1, wherein the clutch ring is provided on both sides of an inner diameter portion of one side end of the clutch ring.

3. 2. The disconnector device including a differential limiting function according to claim 1, wherein a pinion gear and side gears meshing with the pinion gear are provided inside the first and second pressure rings, and the pinion gear is rotatably coupled to a pinion shaft disposed between the side gears.

4. 4. The disconnector device including a differential limiting function according to claim 3, characterized in that a cam portion is provided at the end of the pinion shaft, the cam portion penetrates the pinion gear and is inserted into cam grooves provided in the first and second pressure rings.

5. 5. The disconnector device including a differential limiting function according to claim 4, wherein the first and second pressure rings are disposed between friction members provided on both sides inside the case, and the friction members on both sides are coupled to the outsides of the side gears on both sides.

6. The friction member is 6. The disconnector device including a limited slip differential function according to claim 5, which is a multi-plate clutch.

7. 6. The disconnector device including a differential limiting function according to claim 5, wherein when a rotational resistance difference set between the drive wheels on both sides occurs while the vehicle is traveling, a relative rotational torque is generated between the pinion shaft and the case, whereby the cam portion inserted into the cam groove moves in the differential limiting direction, whereby the pressure rings on both sides are pushed toward the friction members on both sides to pressurize the friction members on both sides, whereby the frictional force of the friction members on both sides acts on the side gears on both sides to enter a differential limiting state.

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