Disconnector device including differential limiting 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 that includes 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 the driving conditions.

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

[0004] However, a device that combines the disconnector function and the 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 that includes a differential limiting function, which is capable of switching power from two-wheel drive to four-wheel drive, and in which, when a difference in rotational resistance occurs between the drive wheels on both sides while the vehicle is running, the friction 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 limited differential function, which includes a case; first and second pressure rings that are arranged on both sides facing each other at a distance inside the case and have first dog portions on their outer diameter portions; and a clutch ring that is coupled to the outer diameter portion of the case and connected to a sleeve that is operated by driving an actuator device, and that moves in an engagement direction when the sleeve is operated by the actuator device, so that second dog portions that are arranged on the inner diameter portion of one side end located inside the case 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 of the clutch ring.

[0009] Also, a pinion gear and side gears on both sides 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 side gears on both sides.

[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] 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 direction of the differential restriction, and the pressure rings on both sides are pushed toward the friction members on both sides, pressurizing the friction members on both sides, and the friction force of the friction members on both sides acts on the side gears on both sides, resulting in a differential restriction state. [Effects of the Invention]

[0014] The present invention allows power to be switched 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 both drive wheels while the vehicle is running, the frictional force of the friction members acts on both side gears, thereby limiting the differential.

[0016] In addition, the present invention not only improves the electric 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 explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view of a disconnector device including a limited slip differential according to a preferred embodiment of the present invention; FIG. [Figure 2] 1 is a partially cutaway perspective view of a disconnector device including a limited slip differential feature according to a preferred embodiment of the present invention; [Figure 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]10 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. [Figure 5] 10 is a view showing a state in which the second dog portions of the clutch ring are engaged with the first dog portions of the double-sided compression rings according to a preferred embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as possible when appearing in other drawings. Furthermore, when describing the present invention, if a detailed description of related well-known structures or functions is deemed to obscure the gist of the present invention, such a detailed description will be omitted. Furthermore, while preferred embodiments of the present invention will be described below, the technical concept of the present invention is not limited thereto and can be modified and implemented in various ways by those skilled in the art.

[0019] FIG. 1 is a perspective 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 perspective 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 view 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 and 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 and 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 installed facing each other on both sides 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 on their outer peripheries.

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

[0030] When the clutch ring 30 is engaged, the second dog portion 32 can be engaged with the first dog portions 211 and 221 provided on the first and second pressure rings 21 and 22, respectively, thereby achieving four-wheel drive.

[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 mesh with the pinion gear 40.

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

[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 gear 51 and the other side gear 52. For example, the friction members 70 may be a multi-plate clutch.

[0037] When the first and second pressure 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 one side driving wheel (not shown), and the other side gear 52 may be connected to the other side driving wheel (not shown).

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

[0040] FIG. 5 is a view showing a state in which the second dog portions of the clutch ring are engaged with the first dog portions 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 portions 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 (not shown) on both sides while the vehicle is running, a relative rotational torque can be generated between pinion shaft 60 and case 10.

[0047] The generation of relative rotational torque causes the cam portion 61 inserted into the cam grooves 212, 222 to move 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 friction members 70 on both sides, thereby applying pressure to the friction members 70 on both sides.

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

[0049] In the present invention, when relative rotational movement occurs between the left and right drive wheels (not shown), the frictional force of the friction members 70 acts on the one side side gear 51 and the other side gear 52, and the differential movement of the drive wheels (not shown) connected to the left and right drive wheels is limited. Therefore, even if one drive wheel falls into a rough road such as a muddy road or a puddle, the force can be transmitted to the other drive wheel, making it possible to easily escape the rough road. Furthermore, when driving around corners, on rainy or snowy roads, the differential movement of the left and right drive wheels (not shown) is limited, 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 allows for power switching from two-wheel drive (2WD) to four-wheel drive (4WD). Furthermore, 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 differential. Furthermore, the present invention not only improves the electric vehicle's fuel economy through the disconnector function, but also ensures driving stability by limiting differential during high-speed cornering by applying a multi-plate clutch limited slip differential (mLSD).

[0052] The above description merely exemplifies the technical concept of the present invention, and those skilled in the art will recognize that various modifications, changes, and substitutions can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments and accompanying drawings disclosed in the present invention are intended to illustrate, not limit, the technical concept of the present invention, and the scope of the technical concept 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 concepts within the equivalent range should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0053] 10 Case 21 First pressure ring 211 ···First Dock 212 Cam groove 22 Second pressure ring 221 First Dock 222 Cam groove 30 Clutch ring 32 Second 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 are provided inside the case on opposite sides at a distance from each other, and each have a first dog portion on its outer periphery; and a clutch ring coupled to an outer diameter portion of the case and connected to a sleeve that is actuated by an actuator device, and that moves in an engagement direction when the sleeve is actuated by the actuator device, so that second dog portions provided on an inner diameter portion of one side end located inside the case engage with the first dog portions of the first and second pressure rings, thereby achieving four-wheel drive; A disconnector device including a limited slip differential function.

2. The second dog portion is 2. The disconnector device with 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 on both sides 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 on both sides.

4. 4. The disconnector device including a differential limiting function according to claim 3, wherein a cam portion is provided at an 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 limited slip differential 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, wherein the disconnector device is a multi-plate clutch.

7. 6. The disconnector device including a differential limiting function according to claim 5, wherein when a set rotational resistance difference occurs between the drive wheels on both sides while the vehicle is running, 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, pushing the pressure rings on both sides toward the friction members on both sides and pressuring the friction members on both sides, so that the friction force of the friction members on both sides acts on the side gears on both sides, resulting in a differential limiting state.

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