Disconnection device

Abstract

The invention provides a disconnecting device, and the disconnecting device comprises a housing; a first clutch ring having a first clutch portion at an outer diameter portion; and a second clutch ring, one side end portion of which is connected to the first clutch ring, has a second clutch portion at a side facing a side half axle gear installed inside the housing, and is coupled to a sleeve at the other side outer diameter portion.

Description

Technical Field

[0001] The invention relates to a disconnect device capable of switching power to four-wheel drive or two-wheel drive and limiting differential speed. Background Art

[0002] Typically, the disconnect device is installed on the differential assembly to separate or connect the differential shaft according to driving conditions, switching power between two-wheel drive (2WD) and four-wheel drive (4WD), thereby minimizing unnecessary power loss.

[0003] The existing disconnect device includes: a differential assembly; a disconnect shaft connected to the right differential half-shaft gear arranged in the differential case; a disconnect hub connected to the right wheel; and a disconnect sleeve for connecting the power of the disconnect shaft and the disconnect hub or cutting off the power. When the disconnect sleeve is meshed with the claw gear part of the disconnect shaft and the claw gear part of the disconnect hub at the same time, the power of the input part of the motor or engine and the output part of the wheel are connected, thereby realizing four-wheel drive (4WD). When the disconnect sleeve moves toward the disconnect hub side to release the meshing state between the claw gear part of the disconnect shaft and the claw gear part of the disconnect hub, the power of the input part of the motor or engine and the output part of the wheel are cut off, thereby realizing two-wheel drive (2WD).

[0004] However, the existing disconnect device has a complicated operation structure, that is, the ball screw shaft, the shift fork and the disconnect sleeve are linked to each other through the operation of the motor, and the disconnect shaft and the disconnect hub are connected through the action of the disconnect sleeve. Due to the complicated operation structure, the overall length of the car is too long, which occupies a large amount of space in the car, which is not conducive to the weight and vehicle performance of the car. In addition, in the case of two-wheel drive with the auxiliary drive wheel of the four-wheel drive car disconnected, when the input part stops rotating, the main drive gear stops, and in the state where the disconnect shaft and the disconnect hub are separated, when the car is moving forward at a high speed, the rotation of the left differential half-shaft gear causes the high differential (High Differential) of the differential pinion to rotate at a high speed, thereby generating noise and vibration.

[0005] Prior art documents

[0006] Patent Documents

[0007] (Patent Document 1) Korean Patent Publication No. 10-2017-0123869 (published on November 9, 2017) Summary of the invention

[0008] In order to solve the above-mentioned problems, the object of the present invention is to provide a disconnecting device for realizing four-wheel drive by engaging the first clutch portion of the first clutch ring with the third clutch portion of the housing through the first action of the sleeve, or realizing differential limiting by engaging the second clutch portion of the second clutch ring with the fourth clutch portion of the half-shaft gear on one side through the second action of the sleeve when the first clutch portion and the third clutch portion are engaged.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a disconnect device, wherein the disconnect device includes: a housing; a first clutch ring having a first clutch part at an outer diameter portion; and a second clutch ring, one end portion of which is connected to the first clutch ring, and has a second clutch part at a side facing a half-shaft gear installed inside the housing, and a sleeve is connected at the outer diameter portion on the other side. The first clutch ring connected to the second clutch ring is inserted into the interior of the housing by a first movement of the sleeve caused by a first operation of an actuator device connected to the sleeve, and the first clutch ring is meshed with a third clutch part arranged at an inner diameter portion of one side of the housing to achieve four-wheel drive.

[0010] Moreover, it may be that, when the first clutch part and the third clutch part are in an engaged state, the second clutch ring moves toward the direction of the one side half-shaft gear by the second movement of the sleeve caused by the second operation of the actuator device, and at the same time, the second clutch part is engaged with the fourth clutch part arranged on one side of the one side half-shaft gear to achieve differential limitation.

[0011] Also, it may be that the first clutch ring is connected to the sleeve via a spacer extending from one side toward the sleeve.

[0012] Furthermore, the first clutch component and the third clutch component may be formed of a spline clutch, and the second clutch component and the fourth clutch component may be formed of a dog clutch.

[0013] Furthermore, the housing may include a support ring inside, a pinion gear inside the support ring, and the pinion gear may mesh with the one side axle gear and the other side axle gear provided on both sides.

[0014] Furthermore, a first gear portion may be formed at an inner diameter portion of the first clutch ring, and the first gear portion may mesh with a second gear portion provided on one outer diameter portion of the support ring.

[0015] Furthermore, the sleeve may be connected to a shift fork, and the shift fork may be arranged on a transfer nut of the actuator device.

[0016] Moreover, it may be that the actuator device includes: a housing; a motor connected to the housing; and a ball screw shaft connected to the motor, the transfer nut is connected to the ball screw shaft and is guided by a guide rail installed inside the housing so as to be movable along the ball screw shaft, and the shift fork extends from the transfer nut through the open portion of the housing toward the sleeve and is connected to the sleeve inside the housing through the through hole of the housing.

[0017] Furthermore, the guide rail may be elastically supported by an elastic member connected to one end portion, and the elastic member may be assembled so that one end portion is inserted into a groove of the housing and the other end portion is clamped in a locking protrusion provided on the guide rail.

[0018] Also, a power transmission member may be provided at the outer side of the housing.

[0019] Furthermore, the power transmission member may be a ring gear, and transmits the power transmitted from the power generation device to the housing.

[0020] Furthermore, the power generation device may be an engine or a drive motor.

[0021] Effects of the Invention

[0022] In the present invention, the first action of the sleeve can mesh the first clutch portion of the first clutch ring with the third clutch portion of the housing to achieve four-wheel drive.

[0023] Furthermore, the present invention can achieve differential limitation by the second action of the sleeve, in the meshing state of the first clutch portion and the third clutch portion, the second clutch portion of the second clutch ring meshes with the fourth clutch portion of the side gear.

[0024] In addition, in the present invention, by releasing the meshing state between the second clutch portion and the fourth clutch portion and the meshing state between the first clutch portion and the third clutch portion, the auxiliary drive wheel that slides when driving in the two-wheel drive mode rotates together with the support ring for supporting the differential gear set including two half-shaft gears and four pinion gears, thereby solving the existing noise problem caused by the high differential.

[0025] In addition, the present invention can facilitate assembly and maintenance and reduce the defect rate through modularization of the actuator device.

[0026] In addition, the present invention can significantly reduce the overall length, thereby significantly improving the weight and packaging installation performance.

[0027] In addition, the present invention can eliminate existing parts such as the disconnect shaft and reduce the number of components by modularizing the actuator device, thereby achieving advantages in terms of space, weight and cost.

[0028] In addition, the present invention can simplify the assembly process through modularization of the actuator device.

[0029] In addition, the present invention can be installed on any reducer as long as the installation space for the first clutch ring and the support ring is ensured through the modularization of the actuator device, thereby shortening the development time and providing high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a side sectional view showing a disconnecting device according to a preferred embodiment of the present invention.

[0031] Figure 2 1 is a diagram showing a two-wheel drive state according to a preferred embodiment of the present invention.

[0032] Figure 3 1 is a diagram showing a four-wheel drive state according to a preferred embodiment of the present invention.

[0033] Figure 4 1 is a side view showing a differential speed limiting state according to a preferred embodiment of the present invention.

[0034] Figure 5 1 is a perspective view showing a differential speed limiting state according to a preferred embodiment of the present invention.

[0035] In the figure:

[0036] 110: housing, 113: third clutch part, 114: through hole, 120: support ring, 121: second gear part, 130: first clutch ring, 131: first clutch part, 132: first gear part, 140: second clutch ring, 142: second clutch part, 151: one side half-shaft gear, 151a: fourth clutch part, 152: other side half-shaft gear, 153: pinion, 160: sleeve, 170: spacer, 180: power transmission member, 200: actuator device, 210: housing, 211: opening part, 212: groove, 220: motor, 230: ball screw shaft, 250: transfer nut, 260: guide rail, 261: locking protrusion, 270: shift fork, S: elastic member DETAILED DESCRIPTION

[0037] 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.

[0038] The present invention can be applied to vehicles such as internal combustion engine vehicles (ICE), hybrid electric vehicles (HEV), and electric vehicles (EV).

[0039] Figure 1 is a side sectional view showing a disconnection device according to a preferred embodiment of the present invention, Figure 5 1 is a perspective view showing a differential speed limiting state according to a preferred embodiment of the present invention.

[0040] like Figure 1 and Figure 5 As shown, the present invention may include: a housing 110 ; a first clutch ring 130 for four-wheel drive (4WD); and a second clutch ring 140 for differential speed limitation.

[0041] The housing 110 may be provided with a support ring 120 , a pinion gear 153 , a side shaft gear 151 on one side meshed with the pinion gear 153 , and a side shaft gear 152 on the other side.

[0042] A power transmission member 180 such as a ring gear may be provided outside the housing 110 . The power transmission member 180 may transmit power from a power generating device (not shown) such as an engine or a drive motor. The power transmitted to the power transmission member 180 may be transmitted to the housing 110 .

[0043] The first clutch ring 130 may include a first clutch portion 131. The first clutch portion 131 may be provided at an outer diameter portion of the first clutch ring 130.

[0044] The second clutch ring 140 may include a second clutch portion 142. The second clutch portion 142 may be disposed at one side of the second clutch ring 140 facing the one side side gear 151.

[0045] For example, the second clutch component 142 may be formed of a dog clutch.

[0046] The first clutch part 131 may be engaged with the third clutch part 113 provided at one inner diameter portion of the housing 110. The second clutch part 142 may be engaged with the fourth clutch part 151a provided at one side of the side gear 151.

[0047] For example, the first clutch component 131 and the third clutch component 113 may be formed of a spline clutch, and the second clutch component 142 and the fourth clutch component 151 a may be formed of a dog clutch.

[0048] The first clutch ring 130 may be connected to the sleeve 160 via a spacer 170 .

[0049] One end portion of the second clutch ring 140 may pass through the sleeve 160 and the spacer 170 to be connected to the first clutch ring 130 .

[0050] The sleeve 160 may be coupled to the outer diameter portion of the second clutch ring 140. The sleeve 160 may be connected to the second clutch ring 140. When the sleeve 160 moves and operates, the first clutch ring 130 and the second clutch ring 140 may move in the meshing direction together with the sleeve 160.

[0051] A pinion gear 153 may be installed inside the support ring 120. The pinion gear 153 may mesh with a side shaft gear 151 on one side and a side shaft gear 152 on the other side.

[0052] A first movement of the sleeve 160 may be achieved by a first operation of the actuator device 200 .

[0053] The sleeve 160 moves by a set first stroke (ST) during the first operation period, and moves the first clutch ring 130 connected to the second clutch ring 140 toward the third clutch portion 113 provided at the inner diameter portion of the housing 110 .

[0054] Through the first action of the sleeve 160, the first clutch ring 130 is inserted into the interior of the housing 110, and at the same time, the first clutch portion 131 of the first clutch ring 130 can be meshed with the third clutch portion 113 of the housing 110. Thus, four-wheel drive can be achieved.

[0055] A second movement of the sleeve 160 may be achieved by a second operation of the actuator device 200 .

[0056] The sleeve 160 moves by the set second stroke during the second action period, and at the same time, the second clutch ring 140 can be moved toward the fourth clutch portion 151 a of the side gear 151 .

[0057] The second clutch ring 140 moves toward the fourth clutch portion 151a of the side gear 151 through the sleeve 160, and the second clutch portion 142 is meshed with the fourth clutch portion 151a, thereby achieving differential speed limitation.

[0058] The sleeve 160 may be connected to a shift fork 270. The shift fork 270 may be disposed on a transfer nut 250 of the actuator device 200.

[0059] The actuator device 200 may include a housing 210, a motor 220, and a ball screw shaft 230. The motor 220 may be coupled to the housing 210. The ball screw shaft 230 may be connected to the motor 220 and may be rotated by driving the motor 220.

[0060] The ball screw shaft 230 may be rotatably supported inside the housing 210 by a supporting member such as a bearing.

[0061] The transfer nut 250 may be disposed inside the housing 210. The transfer nut 250 is coupled to the ball screw shaft 230 and guided by a guide rail 260 installed inside the housing 210, and may move with the transfer nut 250 when the ball screw shaft 230 rotates.

[0062] An elastic member S may be coupled to one side of the guide rail 260 . For example, the elastic member S may be a return spring. The elastic member S may elastically support the guide rail 260 .

[0063] One side of the elastic member S may be inserted into the groove 212 of the housing 210 . The other side of the elastic member S may be assembled to be caught in a catching protrusion 261 provided on the guide rail 260 .

[0064] The fork 270 may extend from the transfer nut 250 through the opening 211 of the housing 210 toward the sleeve 160. The fork 270 may be connected to the sleeve 160 located inside the housing 110 through the through hole 114 of the housing 110. The fork 270 may move within the through hole 114 of the housing 110.

[0065] The first clutch ring 130 may have a first gear portion 132 at an inner diameter portion thereof. The first gear portion 132 may mesh with a second gear portion 121 disposed on an outer diameter portion of one side of the support ring 120.

[0066] Next, the operation of the four-wheel drive of the present invention will be described.

[0067] Figure 2 is a diagram showing a two-wheel drive state according to a preferred embodiment of the present invention, Figure 3 1 is a diagram showing a four-wheel drive state according to a preferred embodiment of the present invention.

[0068] like Figures 1 to 3 As shown, in the two-wheel drive (2WD) state in which the engagement between the first clutch portion 131 of the first clutch ring 130 and the third clutch portion 113 of the housing 110 is released, when the ball screw shaft 230 rotates by driving the motor 220 of the actuator device 200, the transfer nut 250 can move in the engagement direction.

[0069] When the transfer nut 250 moves, the shift fork 270 formed integrally with the transfer nut 250 can move the sleeve 160 .

[0070] Specifically, through the first operation of the actuator device 200 , the sleeve 160 can move a preset first stroke while performing the first action.

[0071] When the sleeve 160 moves the first stroke while performing the first action, the first clutch ring 130 connected to the second clutch ring 140 may move toward the third clutch portion 113 of the housing 110 through the sleeve 160 .

[0072] When the first clutch ring 130 moves toward the third clutch portion 113 of the housing 110 , the first clutch portion 131 of the first clutch ring 130 may mesh with the third clutch portion 113 of the housing 110 , thereby achieving four-wheel drive (4WD).

[0073] For example, a spline is formed on the inner diameter portion of the spacer 170 at one end portion facing the side gear 151 , and a spline is formed on the outer diameter portion of the side gear 151 , so that the inner diameter portion of the spacer 170 and the outer diameter portion spline (SP) of the side gear 151 can mesh.

[0074] In four-wheel drive (4WD), power from a power generating device (not shown) such as an engine or a drive motor may be transmitted to the power transmission member 180 .

[0075] The power of a power generating device (not shown) may be transmitted to the housing 110 through the power transmitting member 180. When the housing 110 rotates, the support ring 120 may rotate.

[0076] The support ring 120 may rotate together with the housing 110 in a state where the second gear portion 121 disposed on the outer diameter portion facing the first clutch ring 130 is meshed with the first gear portion 132 disposed on the inner diameter portion of the first clutch ring 130 .

[0077] When the support ring 120 rotates together with the housing 110 , power is transmitted to the one side axle gear 151 and the other side axle gear 152 meshing with the pinion gear 153 , thereby rotating the one side axle gear 151 and the other side axle gear 152 .

[0078] When the side gear 151 on one side and the side gear 152 on the other side rotate, power is transmitted to the auxiliary drive wheels (not shown) on both sides connected to the side gear 151 on one side and the side gear 152 on the other side, so that the auxiliary drive wheels (not shown) on both sides can be rotated. In this way, it is possible to realize four-wheel drive in which the power of the power transmission device (not shown) is transmitted not only to the main drive wheels (not shown) but also to the auxiliary drive wheels (not shown).

[0079] Next, the operation of the present invention during differential speed limitation will be described.

[0080] Figure 4 1 is a side view showing a differential speed limiting state according to a preferred embodiment of the present invention.

[0081] like Figure 1 , Figure 4 , Figure 5 As shown, in a state where the first clutch portion 131 is engaged with the third clutch portion 113 , the sleeve 160 can move a preset second stroke while performing a second action through a second operation of the actuator device 200 .

[0082] When the sleeve 160 moves the second stroke while performing the second action, the second clutch ring 140 connected to the sleeve 160 may move toward the fourth clutch portion 151 a of the side gear 151 .

[0083] When the second clutch ring 140 moves toward the fourth clutch portion 151a of the side gear 151, the second clutch portion 142 of the second clutch ring 140 meshes with the fourth clutch portion 151a of the side gear 151, thereby achieving differential speed limitation.

[0084] For example, in the differential state, if one driving wheel of the car gets stuck in an uneven road such as a swamp, the left and right driving wheels will be subject to different rotational resistances. Therefore, a relative speed difference will be generated between the half-shaft gear 151 on one side and the half-shaft gear 152 on the other side, causing the driving wheel stuck in the uneven road to spin idly and be unable to escape the uneven road.

[0085] However, in the present invention, in the differential limiting state where the first clutch portion 131 is meshed with the third clutch portion 113 and the second clutch portion 142 is meshed with the fourth clutch portion 151a, since the half-shaft gear 151 on one side and the half-shaft gear 152 on the other side rotate at the same speed, even if one side of the driving wheel falls into an uneven road such as a swamp, it can easily escape from the uneven road.

[0086] Next, the operation of the two-wheel drive of the present invention will be described.

[0087] like Figure 1 and Figure 2 As shown, in a state where the first clutch portion 131 is engaged with the third clutch portion 113 and the second clutch portion 142 is engaged with the fourth clutch portion 151 a , the sleeve 160 can be moved in a disengagement direction by operating the actuator device 200 .

[0088] When the sleeve 160 moves in the disengagement direction, the second clutch ring 140 connected to the sleeve 160 moves in the disengagement direction, and the first clutch ring 130 connected to the second clutch ring 140 may also move in the disengagement direction.

[0089] When the first clutch ring 130 and the second clutch ring 140 move in the disengagement direction, the first clutch part 131 and the third clutch part 113 are disengaged, and the second clutch part 142 and the fourth clutch part 151a are disengaged, thereby achieving two-wheel drive (2WD).

[0090] When two wheels are driven, auxiliary driving wheels (not shown) on both sides coast, and the rotational force of the auxiliary driving wheels on both sides is transmitted to the side gear 151 on one side and the side gear 152 on the other side, so that the side gear 151 on one side and the side gear 152 on the other side can rotate.

[0091] When the one side gear 151 and the other side gear 152 rotate in a state of being meshed with the pinion gear 153 , the support ring 120 may also rotate together with the one side gear 151 and the other side gear 152 .

[0092] When the support ring 120 rotates freely inside the housing 110 , two-wheel drive (2WD) driving can be achieved in which the auxiliary drive wheels (not shown) slide and only the main drive wheels (not shown) are used for driving.

[0093] For example, since the electric vehicle runs at a high speed, high differential noise may be inevitably generated. However, the present invention can solve the existing problem of high differential noise generated when the support ring 120 rotates in the housing 110.

[0094] 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, characterized in that: include: case; a first clutch ring having a first clutch portion at an outer diameter portion; as well as The second clutch ring has one end connected to the first clutch ring, has a second clutch portion at one side facing the side gear installed inside the housing, and is connected to a sleeve at the other side outer diameter portion. The first movement of the sleeve is caused by the first operation of the actuator device connected to the sleeve, the first clutch ring connected to the second clutch ring is inserted into the interior of the shell, and the first clutch part is engaged with the third clutch part arranged at the inner diameter part of one side of the shell to achieve four-wheel drive.

2. The disconnect device according to claim 1, characterized in that: When the first clutch part and the third clutch part are in meshing state, the second clutch ring moves toward the direction of the one side half-shaft gear through the second movement of the sleeve caused by the second operation of the actuator device, and at the same time, the second clutch part is meshed with the fourth clutch part arranged on one side of the one side half-shaft gear to achieve differential limitation.

3. The disconnect device according to claim 1, characterized in that: The first clutch ring is connected to the sleeve via a spacer extending from one side toward the sleeve.

4. The disconnect device according to claim 2, characterized in that: The first clutch component and the third clutch component are composed of spline clutches, and the second clutch component and the fourth clutch component are composed of dog clutches.

5. The disconnect device according to claim 1, characterized in that: A support ring is provided inside the housing, a pinion gear is provided inside the support ring, and the pinion gear is meshed with the one side axle gear and the other side axle gear provided on both sides.

6. The disconnect device according to claim 5, characterized in that: A first gear portion is formed at an inner diameter portion of the first clutch ring, and the first gear portion meshes with a second gear portion provided on one outer diameter portion of the support ring.

7. The disconnect device according to claim 1, characterized in that: The sleeve is connected to a shift fork, and the shift fork is arranged on a transfer nut of the actuator device.

8. The disconnect device according to claim 7, characterized in that The actuator device comprises: shell; a motor coupled to the housing; and A ball screw shaft connected to the motor, The transfer nut is connected to the ball screw shaft and is guided by a guide rail installed inside the housing so as to be movable along the ball screw shaft. The shift fork extends from the transfer nut through the open portion of the housing toward the sleeve and is connected to the sleeve inside the housing through a through hole of the housing.

9. The disconnect device according to claim 8, characterized in that The guide rail is elastically supported by an elastic member connected to one end portion, and the elastic member is assembled so that one end portion is inserted into the groove of the housing and the other end portion is clamped on a locking protrusion arranged on the guide rail.

10. The disconnect device according to claim 1, characterized in that A power transmission member is provided at the outer side of the housing.

11. The disconnect device according to claim 10, characterized in that The power transmission member is a ring gear, and transmits the power transmitted from the power generation device to the housing.

12. The disconnect device according to claim 11, characterized in that The power generation device is an engine or a drive motor.

Images