Disconnector apparatus with limited slip differential

Abstract

The present invention has been made in an effort to provide a disconnector apparatus having a limited-slip differential, in which a first engagement part of a clutch ring is engaged with a second engagement part of a support ring to enable four wheel drive, and one side gear part is in close contact with a first friction member or the other side gear part is in close contact with a second friction member to implement limited slip differential.SOLUTION: A disconnector apparatus having a limited-slip differential according to the present invention includes a case, a support ring configured to surround a pinion gear inside the case, and a clutch ring connected to a sleeve operated by driving of an actuator and configured to move in an engagement direction when the sleeve is operated by the actuator so that a first engagement part provided at one end portion positioned inside the case is engaged with a second engagement part provided on one surface of the support ring to perform four wheel driving.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a disconnector device that includes a limited slip differential. [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 limits differential movement by using friction when relative rotational movement occurs between the left and right drive wheels.

[0004] A limited slip differential (LSD) ensures driving safety by transmitting force to the other drive wheel when one wheel falls into mud or a puddle, or by preventing wheel slippage when going around a corner.

[0005] However, a device that combines the disconnector function and the differential limiting function has not yet been developed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Republic of Korea Publication Patent No. 10-2017-0123869 (November 9, 2017) Summary of the Invention [Problem to be solved by the invention]

[0007] In order to solve the above-mentioned problems, the present invention aims to provide a disconnector device having a limited slip differential device in which a first meshing portion of a clutch ring meshes with a second meshing portion of a support ring to enable four-wheel drive, and one side gear portion is in close contact with a first friction member or the other side gear is in close contact with a second friction member to achieve limited slip differential. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a disconnector device with a limited slip differential, including a case; a support ring configured to surround a pinion gear inside the case; and a clutch ring that is connected to a sleeve that is actuated by driving an actuator, and that moves in an engagement direction when the sleeve is actuated by the actuator, so that a first meshing portion provided on one side end located inside the case meshes with a second meshing portion provided on one surface of the support ring, thereby achieving four-wheel drive.

[0009] In addition, one side gear portion and the other side gear portion may be provided on both sides of the pinion gear, and the one side gear portion and the other side gear portion may have gear portions that mesh with the pinion gear on one side facing the pinion gear, and one side shaft portion may be extended from the other side of the one side gear portion, and the other side shaft portion may be extended from the other side of the other side gear portion.

[0010] The friction member may further include a first friction member coupled to an outer diameter portion of the one-side shaft portion so as to be positioned between the one-side side gear portion and the case; and a second friction member coupled to an outer diameter portion of the other-side shaft portion so as to be positioned between the other-side side gear portion and the case.

[0011] The first friction member and the second friction member may be configured as a multi-plate clutch.

[0012] In addition, when traveling on a rough road in a four-wheel drive state in which the first meshing portion and the second meshing portion are meshed, the other surface of the one side side gear portion is in close contact with the first friction member, or the other surface of the other side side gear portion is in close contact with the second friction member, thereby achieving a limited differential state.

[0013] In addition, the sleeve is coupled to an outer diameter portion of the case and connected to an actuator, and the clutch ring coupled to the sleeve moves in an engagement direction by driving the actuator, so that the first engagement portion can be engaged with the second engagement portion of the support ring.

[0014] The first and second meshing portions may be configured as dog clutches.

[0015] The first meshing portion is provided on one surface of a ring member facing the second meshing portion, and the ring member is detachable from the clutch ring.

[0016] The ring member may be connected to the clutch ring by a connecting member, and the connecting member may pass through one end of the clutch ring and be screwed to the ring member.

[0017] The clutch ring may include one end portion that penetrates the case and is positioned inside the case; another end portion that is coupled to the outer diameter portion of the case so as to be positioned outside the case; and a stepped portion that is provided on the inner diameter portion of the other end portion and is engaged with an engaging protrusion provided on the outer diameter portion of the case to limit movement of the clutch ring. [Effects of the Invention]

[0018] The present invention can realize power switching from two-wheel drive (2WD) to four-wheel drive (4WD). In addition, in the present invention, when traveling around corners, on rainy or snowy roads in four-wheel drive mode, one side gear portion is brought into close contact with the first friction member and the other side gear portion is brought into close contact with the second friction member, thereby realizing differential limiting. In addition, the present invention not only improves the electric fuel economy of electric vehicles through the disconnector function, but also ensures driving safety by applying a multi-plate clutch limited slip differential (mLSD) and performing the differential limiting function during high-speed cornering. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a view showing a two-wheel drive operation according to a preferred embodiment of the present invention; [Figure 2] 1 is a view showing a four-wheel drive operation according to a preferred embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, a preferred embodiment 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 reference numerals are assigned to identical components when they appear in different drawings whenever possible. 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, although a preferred embodiment 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.

[0021] FIG. 1 is a view showing a two-wheel drive operation according to a preferred embodiment of the present invention, and FIG. 2 is a view showing a four-wheel drive operation according to a preferred embodiment of the present invention.

[0022] As shown in FIGS. 1 and 2, the present invention can include a case 10, a support ring 20 mounted inside the case 10, and a clutch ring 30 that engages with the case.

[0023] A first meshing portion 331 may be provided at one end 31 of the clutch ring 30. The first meshing portion 331 may be configured as a dog clutch.

[0024] The support ring 20 may be configured to surround the pinion gear 40 inside the case 10. A second meshing portion 22 may be provided on one surface of the support ring 20 facing the clutch ring 30. The second meshing portion 22 may be configured as a dog clutch that matches the first meshing portion 331.

[0025] One side gear portion 71 and the other side gear portion 72 may be provided on both sides of the pinion gear 40. The one side gear portion 71 may have a gear portion 711 that meshes with the pinion gear 40 on one side facing the pinion gear 40. The other side gear portion 72 may have a gear portion 721 that meshes with the pinion gear 40 on one side facing the pinion gear 40.

[0026] One side shaft portion 713 may be integrally formed with one side gear portion 71. One side shaft portion 713 may be formed to extend from the other surface 712 of one side gear portion 71.

[0027] The other side shaft portion 723 may be integrally formed with the other side gear portion 72. The other side shaft portion 723 may be formed by extending from the other surface 722 of the other side gear portion 72.

[0028] A first friction member 81 may be provided between the one side gear portion 71 and the case 10. The first friction member 81 may be coupled to an outer diameter portion of the one side shaft portion 713.

[0029] A second friction member 82 may be provided between the other side gear portion 72 and the case 10. The second friction member 82 may be coupled to an outer diameter portion of the other side shaft portion 723.

[0030] The first friction member 81 and the second friction member 82 may be configured as a multi-plate clutch. By adjusting the number of multi-plate clutches, it can be applied to all vehicles.

[0031] In a four-wheel drive state, the other surface 712 of the one side gear portion 71 is in close contact with the first friction member 81, or the other surface 722 of the other side gear portion 72 is in close contact with the second friction member 82, thereby realizing a differential restriction state.

[0032] The first meshing portion 331 may be provided on one surface of the ring member 33 facing the second meshing portion 22. The ring member 33 may be configured integrally with the clutch ring 30, but it is preferable that it be configured to be detachable from the clutch ring 30.

[0033] The ring member 33 may be connected to one end 31 of the clutch ring 30 by a connecting member B such as a bolt. The connecting member B may be threadedly connected to the ring member 33 by passing through one end 31 of the clutch ring 30.

[0034] For example, if the ring member 33 is configured integrally with the clutch ring 30, if the first meshing portion 331 is damaged, the entire clutch ring 30 must be replaced. However, if the ring member 33 is configured to be detachable from the clutch ring 30, when the first meshing portion 331 is damaged, the ring member 33 with the damaged first meshing portion 331 can be separated from the clutch ring 30 and replaced with a new ring member 33.

[0035] One end 31 of the clutch ring 30 may penetrate the case 10 and be positioned inside the case 10. The other end 32 of the clutch ring 30 may be positioned outside the case 10. The other end 32 of the clutch ring 30 may be coupled to the outer diameter portion of the case 10.

[0036] A step portion 321 may be provided on an inner diameter portion of the other end portion 32 of the clutch ring 30. The step portion 321 may be engaged with a locking protrusion 11 provided on an outer diameter portion of the case 10. As the step portion 321 is engaged with the locking protrusion 11, movement of the clutch ring 30 in the meshing direction may be limited.

[0037] The sleeve 60 may be connected to the actuator 50 by a connecting member such as a fork (not shown). The sleeve 60 may be moved by driving the actuator 50. As the sleeve 60 moves, the clutch ring 30 connected to the sleeve 60 may move in the meshing direction.

[0038] Next, the operation of the present invention in four-wheel drive mode will be described.

[0039] In a two-wheel drive state in which the first meshing portion 331 is separated from the second meshing portion 22 as shown in FIG. 1, the sleeve 60 can move in the meshing direction by operating the actuator 50 as shown in FIG.

[0040] As the sleeve 60 moves in the meshing direction, the clutch ring 30 connected to the sleeve 60 can move in the meshing direction.

[0041] As the clutch ring 30 moves in the meshing direction, the first meshing portion 331 may mesh with the second meshing portion 22 of the support ring 20. With the first meshing portion 331 meshed with the second meshing portion 22, the stepped portion 321 of the clutch ring 30 is locked by the locking protrusion 11 of the case 10, thereby restricting the movement of the clutch ring 30.

[0042] The first meshing portion 331 meshes with the second meshing portion 22, thereby realizing a four-wheel drive state.

[0043] 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 .

[0044] On the other hand, differential limitation is not performed during two-wheel drive when the first meshing portion 331 and the second meshing portion 22 are disengaged. Two-wheel drive can reduce electricity consumption (fuel economy) compared to four-wheel drive.

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

[0046] As shown in FIG. 2, in a four-wheel drive state in which the first meshing portion 331 and the second meshing portion 22 are meshed, an axial force may be generated between the one-side side gear portion 71 and the other-side side gear portion 72 while the vehicle is running. Due to the axial force of the one-side side gear portion 71 and the other-side side gear portion 72, the one-side side gear portion 71 is pressed toward the first friction member 81, so that the other surface 712 of the one-side side gear portion 71 is in close contact with the first friction member 81, and the other-side side gear portion 72 is pressed toward the second friction member 82, so that the other surface 722 of the other-side side gear portion 72 is in close contact with the second friction member 82.

[0047] In this manner, a differential limiting state can be achieved by the friction force generated when the other surface 712 of the one side gear portion 71 presses the first friction member 81 or when the other surface 722 of the other side gear portion 72 presses the second friction member 82.

[0048] As described above, the present invention allows for power switching from two-wheel drive (2WD) to four-wheel drive (4WD). Furthermore, when traveling on rough roads such as corners, rainy roads, and snowy roads in four-wheel drive mode, one side gear portion is brought into close contact with a first friction member and the other side gear portion is brought into close contact with a second friction member, thereby realizing limited slip differential. Furthermore, the present invention not only improves the electric vehicle's fuel economy through the disconnector function, but also ensures driving safety by applying a multi-plate clutch limited slip differential (mLSD) to perform the limited slip differential function during high-speed cornering.

[0049] 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 by the claims, and all technical concepts within the equivalent range should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0050] 10 Case 11...locking protrusion 20 Support ring 22 Second meshing portion 30 Clutch ring 31...One side end 32...Other end 321 Step 33 Ring member 331 First meshing part 40 Pinion gear 50 Actuators 60 sleeves 71 One side gear part 711 Gear section 712...other side 713 One side shaft part 72 Other side gear part 721 Gear section 722...other side 723 Other side shaft part 81 First friction member 82 Second friction member B: Connecting member

Claims

1. case; a support ring configured to surround the pinion gear within the case; and a clutch ring connected to a sleeve that is actuated by the driving of an actuator, and that moves in an engagement direction when the sleeve is actuated by the actuator, so that a first engagement portion provided at one end portion located inside the case engages with a second engagement portion provided on one surface of the support ring, thereby achieving four-wheel drive; A disconnector device with a limited slip differential, comprising:

2. 2. The disconnector device with a limited slip differential according to claim 1, wherein one side gear portion and the other side gear portion are provided on both sides of the pinion gear, the one side gear portion and the other side gear portion have gear portions that mesh with the pinion gear on one side facing the pinion gear, one side shaft portion is extended on the other side of the one side gear portion, and the other side shaft portion is extended on the other side of the other side gear portion.

3. a first friction member coupled to an outer diameter portion of the one-side shaft portion so as to be positioned between the one-side side gear portion and the case; and a second friction member coupled to an outer diameter portion of the other-side shaft portion so as to be positioned between the other-side side gear portion and the case; 3. A disconnector device comprising the limited slip differential device of claim 2.

4. The first friction member and the second friction member are 4. A disconnector device comprising the limited slip differential device according to claim 3, characterized in that it is configured as a multi-plate clutch.

5. 5. The disconnector device having a limited slip differential according to claim 4, wherein when traveling on a rough road in a four-wheel drive state in which the first meshing portion and the second meshing portion are meshed, the other surface of the one side side gear portion is in close contact with the first friction member or the other surface of the other side side gear portion is in close contact with the second friction member, thereby realizing a limited slip differential state.

6. 2. The disconnector device having a differential limiting device according to claim 1, characterized in that the sleeve is coupled to an actuator while being connected to the outer diameter portion of the case, and the clutch ring coupled to the sleeve moves in the engagement direction by driving the actuator, thereby engaging the first engagement portion with the second engagement portion of the support ring.

7. 2. The disconnector device with a limited slip differential according to claim 1, wherein the first and second engagement portions are configured as dog clutches.

8. 3. The disconnector device with a limited slip differential according to claim 2, wherein the first meshing portion is provided on one surface of the ring member facing the second meshing portion, and the ring member is detachable from the clutch ring.

9. 9. The disconnector device with a limited slip differential according to claim 8, wherein the ring member is connected to the clutch ring by a connecting member, the connecting member passing through one side end of the clutch ring and being screwed to the ring member.

10. The clutch ring is one side end portion that penetrates the case and is positioned inside the case; the other end portion being coupled to the outer diameter portion of the case so as to be positioned outside the case; and a step portion provided on the inner diameter portion of the other end portion, which is engaged with a locking protrusion provided on the outer diameter portion of the case to limit the movement of the clutch ring; 9. A disconnector device comprising a limited slip differential according to claim 8.

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