Disconnector

Abstract

The present invention provides a disconnecter, which includes: a support ring disposed inside the differential case for supporting a pinion gear mounted therein; a clutch ring that performs a coupling or disengagement operation with the support ring inside the differential case; an actuator having an armature, the armature being disposed outside the differential case on the opposite side of the clutch ring, and pulling the armature connected to the clutch ring through an operating rod by electromagnetic force to thereby complete the coupling of the clutch ring and the support ring; and an elastic member coupled to the operating rod portion inside the differential case, with one end contacting the differential case and the other end contacting the clutch ring to elastically support the clutch ring.

Description

Technical Field

[0001] The present invention relates to a disconnecting clutch for four-wheel drive of vehicles such as internal combustion engine vehicles (ICE), hybrid electric vehicles (HEV), and electric vehicles (EV, battery electric vehicle). Background Art

[0002] Generally, a disconnecting clutch is installed on a differential assembly, and separates or connects a differential shaft according to driving conditions to switch to two-wheel drive (2WD) and four-wheel drive (4WD), thereby minimizing unnecessary power loss.

[0003] Most of the existing disconnecting clutches use a control system such as a hydraulic motor or a pneumatic motor to move a sleeve to cut off the power of an input part such as a motor or an engine and an output part such as a wheel, thereby switching from four-wheel drive (4WD) to two-wheel drive (2WD).

[0004] Figure 1 FIG. shows an existing disconnecting clutch. Refer to Figure 1 , the existing disconnecting clutch 200 is connected to the differential assembly 100. A differential gear set is installed inside the differential case 101 of the differential assembly 100. The differential gear set includes two first side gears 111 and a second side gear 112, and two pinions 121 and 122 that mesh with the first side gear 111 and the second side gear 112.

[0005] The existing disconnecting clutch 200 includes: a differential shaft 210, which is arranged inside the differential case 101 and is connected to the first side gear 111 on the Figure 2 right side; a wheel hub 220, which is connected to the right wheel; a ball screw shaft 240, which is connected to a motor 230 and rotates by the operation of the motor 230; a nut 250, which can move along with the ball screw shaft 240 when the ball screw shaft 240 operates while being coupled to the ball screw shaft 240; and a shift fork 280, which can move along a guide rail 260 through the operation of the nut 250, and connects or disconnects the differential shaft 210 and the wheel hub 220 through a moving sleeve 270.

[0006] In the existing disconnecting device 200, the ball screw shaft 240 rotates by driving a motor 230 including a position sensor. With the rotation of the ball screw shaft 240, the shift fork 280 moves together with a nut 250 that moves along with the ball screw shaft 240. When the shift fork 280 moves, the shift fork 280 and a sleeve 270 connected through the shift fork 280 move. At the same time, the differential shaft 210 and the hub 220 are engaged to connect power, or the engagement between the differential shaft 210 and the hub 220 is released to cut off power. Specifically, when the ball screw shaft 240 rotates in one direction under the drive of the motor 230, while the sleeve 270 moves toward the differential shaft 210, the engagement between the differential shaft 210 and the hub 220 is completed, whereby power is transmitted to the right wheel. On the contrary, when the ball screw shaft 240 rotates in the other direction under the drive of the motor 230, while the sleeve 270 moves toward the hub 220, the connection between the differential shaft 210 and the hub 220 is released.

[0007] However, in the existing disconnecting device, the differential shaft separated from the motor is connected to the hub through the ball screw shaft, the shift fork, and the sleeve. Due to the complex structure, there are serious problems as follows: the overall length is too large, the assembly space is wide, the weight is heavy, which is not conducive to the installation on the vehicle. Moreover, due to excessive power consumption (20 A) for driving the motor, precise control of the stroke of the BLDC motor is required, etc., resulting in the complexity of the drive of the control system and an increase in manufacturing costs. Also, in the case of a two-wheel drive where the auxiliary drive wheel of a four-wheel drive vehicle is disconnected, the rotation of the input part stops, and accordingly, the final reduction gear also stops. In the state where the differential shaft is separated from the hub, when the vehicle travels straight at high speed, as the left side gear rotates, the pinion rotates at high speed. Due to the high differential generated at this time, noise and vibration occur.

[0008] In contrast, the present invention proposes a disconnecting device, which includes: a differential case for transmitting input torque; a differential gear set for handling differential; a support ring for supporting the pinion of the differential gear set; a clutch ring that is coupled or disengaged with the support ring; an elastic member for elastically supporting the clutch ring; and an actuator that realizes disconnection by operating in a non-contact state between the armature of the clutch ring and the magnetic coil through an operating rod. With such a configuration and through non-contact operation, the structure is simple, which is beneficial to durability and noise, and the installability is excellent.

[0009]

Prior Art Documents

[0010]

Patent Documents

[0011] Patent Document 1: Korean Patent Publication No. 10-2017-0123869 (published on November 9, 2017) Summary of the Invention

[0012] To solve the above problems, the present invention provides a disconnecter, in which an armature connected to an operating rod directly connected to a clutch ring and a magnetic coil operate in a non-contact state to complete disconnection, and can couple or decouple a clutch and a support ring.

[0013] To achieve the above object, the present invention provides a disconnecter, which includes: a support ring disposed inside a differential case for supporting a pinion gear installed therein; a clutch ring for coupling or decoupling with the support ring inside the differential case; an actuator having an armature disposed outside the differential case on the opposite side of the clutch ring, and pulling the armature connected to the clutch ring through an operating rod by electromagnetic force to complete the coupling of the clutch ring and the support ring; and an elastic member coupled to a portion of the operating rod inside the differential case, with one end contacting the differential case and the other end contacting the clutch ring to elastically support the clutch ring.

[0014] In addition, the actuator includes: a magnetic core disposed opposite to the armature; and a magnetic coil which generates electromagnetic force when power is applied while being accommodated inside the magnetic core to pull the armature.

[0015] In addition, the magnetic core and the magnetic coil are configured as a non-contact structure with the armature.

[0016] In addition, the magnetic coil and the magnetic core are fixed to a transmission case and are independent of the rotation of the differential case.

[0017] In addition, a bushing is coupled to an extension portion extending from one side of the differential case toward the actuator, and the armature and the center portion of the magnetic core are coupled to the bushing.

[0018] In addition, the bushing is a non-magnetic body.

[0019] In addition, a claw portion is provided, and the claw portion can couple or separate from the opposing surfaces of the clutch ring and the support ring.

[0020] In addition, the outer diameter of the clutch ring and the inner diameter of the differential case are connected through a spline structure.

[0021] In addition, one end of the operating rod is connected to the clutch ring, and the other end penetrates the differential case and is connected to the armature.

[0022] In addition, the armature is a magnetic body.

[0023] In addition, a central shaft is provided inside the support ring, pinion gears are rotatably coupled on both sides of the central shaft, and side gears meshing with the pinion gears on both sides are provided on both sides of the pinion gears on both sides.

[0024] In addition, a side end portion of the differential case is constituted by a detachable lid, and a drive gear is mounted on the lid.

[0025] Advantages of the Invention

[0026] According to the present invention, the armature connected to the operating rod directly connected to the clutch ring operates in a non-contact state with the magnetic coil to complete disconnection, whereby the clutch and the support ring can be coupled or decoupled.

[0027] In addition, according to the present invention, in a state where the connection of the disconnecter is released, when the vehicle travels in a two-wheel drive (2WD) mode, the auxiliary drive wheels that coast rotate together with the support ring that supports the half shaft gear, thereby preventing the occurrence of high differential.

[0028] In addition, according to the present invention, by using a magnetic coil, the current consumption is small.

[0029] In addition, according to the present invention, through the non-contact rotational movement of the armature, it is beneficial to wear resistance and noise, and is embodied in a structure having a large-area electromagnetic action between the armature and the magnetic coil, thereby making its action and responsiveness excellent.

[0030] In addition, according to the present invention, by replacing existing high-cost actuators such as a high-current BLDC motor, a ball screw shaft, and a shift fork with a low-cost and low-current magnetic coil, and by removing the thrust bearing, the cost can be reduced.

[0031] In addition, according to the present invention, by integrating the differential assembly and the disconnecter, the overall length can be significantly reduced, and the weight and the mountability of the package can be significantly improved.

[0032] In addition, according to the present invention, by removing large parts such as the hub and the sleeve, and by removing the bearings that support these, and by configuring the armature and the magnetic coil in a non-contact manner, the thrust bearing can be removed, reducing the number of parts.

[0033] In addition, according to the present invention, by integrating the differential assembly and the disconnecter, the assembly process can be simplified. Description of the Drawings

[0034] Figure 1 FIG. is a view showing a conventional disconnecter.

[0035] Figure 2 FIG. is a side view showing a disconnecter according to a preferred embodiment of the present invention.

[0036] Figure 3 is along Figure 2 sectional view taken along line A-A of.

[0037] Figure 4 FIG. 1 shows a state in which a clutch ring and a support ring are assembled inside a differential case according to a preferred embodiment of the present invention.

[0038] Figure 5 FIG. 2 is an enlarged view of a clutch ring according to a preferred embodiment of the present invention.

[0039] In the figure:

[0040] 300: Differential assembly, 310: Differential case, 310a: Cover, 311: Extension, 312: Support ring, 312a: Second claw portion, 312b: Central axis, 321: First pinion, 322: Second pinion, 331: First side gear, 332: Second side gear, 340: Driving gear, 400: Disconnector, 420: Clutch ring, 421: First claw portion, 430: Elastic member, 444: Armature, 444a: Inclined surface, 445: Magnetic coil, 446: Magnetic core, 446a: Inclined surface, 450: Operating rod, 460: Bushing, G: Air gap, S: Spline DETAILED DESCRIPTION

[0041] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that when reference symbols are assigned to each drawing, the same reference symbols are assigned to the same components even on different drawings. Also, when describing the present invention, if it is determined that a detailed description of a related well-known configuration or function will obscure the gist of the present invention, the detailed description thereof will be omitted. Preferred embodiments of the present invention will be described below, but the technical idea of the present invention is not limited thereto and can be variously modified and implemented by those skilled in the art.

[0042] The disconnector of the present invention is a device that cuts off power transmission in a four-wheel drive (4WD) vehicle in which the front wheels or the rear wheels are the main driving wheels and the other wheels (rear wheels or front wheels) are the auxiliary driving wheels, in order to prevent rotational resistance (drag) caused by coasting of the auxiliary drive wheel reducer and the back electromotive force of the motor and to improve fuel efficiency when traveling only with the power of the main driving wheels.

[0043] Figure 2 FIG. 3 is a side view of a disconnector according to a preferred embodiment of the present invention, Figure 3 is a cross-sectional view taken along line A-A of Figure 2 FIG. 4, Figure 4 FIG. 1 shows a state in which a clutch ring and a support ring are assembled inside a differential case according to a preferred embodiment of the present invention. Figure 5 FIG. 2 is an enlarged view of a clutch ring according to a preferred embodiment of the present invention.

[0044] As shown in Figures 2 to 5As shown, the disconnecter 400 of the present invention is coupled to the differential assembly 300. The present invention includes: a support ring 312 for supporting the first pinion 321 and the second pinion 322; a clutch ring 420 that is coupled or disengaged from the support ring 312; an actuator that pulls an armature 444 connected to the clutch ring 420 by an operating rod 450 by electromagnetic force to complete the coupling of the clutch ring 420 and the support ring 312; and an elastic member 430 for elastically supporting the clutch ring 420.

[0045] Specifically, the differential case 310 constituting the differential assembly 300 includes an extension portion 311. The extension portion 311 extends toward the actuator on one side of the differential case 310. The differential case 310 may be configured as a separable structure. For example, the end portion on the driving gear 340 side of the differential case 310 may be constituted by a lid 310a that can be disassembled and assembled by a coupling member such as a bolt, and the driving gear 340 may be installed outside the lid 310a. The lid 310a can support the second half shaft gear 332.

[0046] Inside the differential case 310, there is a differential gear set such as a first half shaft gear 331, a second half shaft gear 332, a first pinion 321, and a second pinion 322. For example, the first half shaft gear 331 may be located Figure 2 on the right side. For example, the second half shaft gear 332 may be located Figure 2 on the left side.

[0047] One end portion of the first half shaft gear 331 facing the second half shaft gear 332 has gear teeth. A part of the other end portion of the first half shaft gear 331 may be exposed to the outside through the inside of the extension portion 311. The first half shaft gear 331 and the second half shaft gear 332 arranged on both sides may be connected to auxiliary drive wheels (not shown) on the left and right sides through drive shafts (not shown).

[0048] The support ring 312 is provided inside the differential case 310. The support ring 312 supports the first pinion 321 and the second pinion 322 inside the differential case 310. For example, the support ring 312 is configured as a structure separated from the differential case 310 so as to operate inside the differential case 310. A central shaft 312b is provided inside the support ring 312. The first pinion 321 and the second pinion 322 are rotatably coupled to both sides of the central shaft 312b. The first pinion 321 and the second pinion 322 are located between the first half shaft gear 331 and the second half shaft gear 332.

[0049] The clutch ring 420 is provided inside the differential case 310. The clutch ring 420 can be coupled or separated from the support ring 312. The clutch ring 420 is located on the second half shaft gear 332 side.

[0050] The outer diameter part of the clutch ring 420 and the inner diameter part of the corresponding differential case 310 can be connected by a spline S structure. When the actuator operates in the state where the clutch ring 420 is connected to the differential case 310 through the spline S structure, it can move in the direction of the support ring 312.

[0051] The clutch ring 420 includes a first claw portion 421. The first claw portion 421 is provided on the side surface of the clutch ring 420 facing the support ring 312.

[0052] A second claw portion 312a is provided on the side surface of the support ring 312. The first claw portion 421 of the clutch ring 420 is correspondingly coupled to the second claw portion 312a of the support ring 312.

[0053] For example, the clutch ring 420 further includes other claw portions in addition to the first claw portion 421, and they are coupled to the claw portions provided on the corresponding differential case 310.

[0054] The elastic member 430 is located inside the differential case 310. For example, the elastic member 430 can be a return spring. The elastic member 430 is coupled to a part of the internal operating rod 450 of the differential case 310. One end portion of the elastic member 430 contacts the differential case 310, and the other end portion contacts the clutch ring 420.

[0055] The actuator includes: an armature 444, a magnetic core 446 disposed opposite to the armature 444, and a magnetic coil 445 disposed inside the magnetic core 446.

[0056] The extension portion 311 is formed with an outer diameter smaller than the outer diameter of the differential case 310. A bushing 460 can be installed on the extension portion 311 of the differential case 310. The central portions of the armature 444 and the magnetic core 446 are installed in the bushing 460. The magnetic coil 445 and the center of the armature 444 can be aligned through the bushing 460. The function of the bushing 460 is to axially guide the movement of the armature 444.

[0057] For example, the bushing 460 can be made of a non-magnetic material. By making the bushing 460 of a non-magnetic material, the leakage of the electromagnetic force generated when power is applied to the magnetic coil 445 can be prevented.

[0058] The magnetic core 446 and the magnetic coil 445 may be fixed to the transmission case (not shown). The magnetic core 446 and the magnetic coil 445 may be configured to be independent of the rotation of the differential case 310. Specifically, when the differential case 310 rotates in a state where the claws of the clutch ring 420 and the support ring 312 are connected, the clutch ring 420, the support ring 312 and the armature 444 also rotate together with the differential case 310, while the magnetic coil 445 and the magnetic core 446 are fixed inside the reducer case (not shown), and therefore cannot rotate. For example, the disconnector 400 may be installed inside the transmission case (not shown).

[0059] The magnetic core 446 and the magnetic coil 445 are configured to have a non-contact structure with the armature 444 via an air gap G having a predetermined interval therebetween.

[0060] At least a portion of the mutually facing surfaces of the core 446 and the armature 444 may be formed by inclined surfaces 444a, 446a. With this structure, when assembling the core 446 and the armature 444, interference with other parts can be avoided and assembly convenience can be provided.

[0061] For example, the armature 444 may be made of a ferromagnet. Since the armature 444 is made of a ferromagnet, it can be easily pulled by the electromagnetic force generated when power is applied to the magnetic coil 445.

[0062] The armature 444 is provided on the outside of the differential case 310 on the opposite side of the clutch ring 420. One end of the operating rod 450 is connected to the clutch ring 420, and the other end passes through the differential case 310 and is connected to the armature 444. Preferably, for example, an assembly component such as a bushing is connected to the portion of the differential case 310 to which the operating rod 450 is connected, and then the operating rod 450 is connected inside the assembly component, so that the armature 444 connected to the operating rod 450 is accurately assembled at a predetermined position.

[0063] The clutch ring 420 can stably move along with the operating rod 450 while being elastically supported by the elastic member 430 .

[0064] Next, the operation of the disconnector of the present invention in the two-wheel drive mode will be described.

[0065] like Figure 2 , Figure 3 As shown, in the two-wheel drive (2WD), in the initial state before power is applied to the magnetic coil 445, the clutch ring 420 is pushed by the elastic force of the elastic member 430 and is located in the direction of releasing the coupling of the claw portion. Thus, it can operate in the Normal Open type of the two-wheel drive (2WD) mode.

[0066] Specifically, in the two-wheel drive (2WD) state, since the clutch ring 420 is pushed by the elastic force of the elastic member 430 and is in the direction of releasing the claw portion, the first claw portion 421 of the clutch ring 420 and the second claw portion 312a of the support ring 312 are in a disengaged state. At this time, the power of the power source such as the motor (not shown) of the speed reducer is in a stopped state, so the power of the power source is not transmitted to the drive gear 340.

[0067] In this state, when the two side auxiliary drive wheels (not shown) skid, the rotational force of the two side auxiliary drive wheels is transmitted to the first differential side gears 331 and the second differential side gears 332 on both sides through the drive shaft (not shown), causing the first differential side gears 331 and the second differential side gears 332 to rotate.

[0068] The first differential side gears 331 and the second differential side gears 332 are in a meshed state with the first pinion 321 and the second pinion 322. As the first differential side gears 331 and the second differential side gears 332 rotate, the support ring 312 also rotates together with the first differential side gears 331 and the second differential side gears 332.

[0069] At this time, since the support ring 312 is structured to be separated from the differential case 310, only the support ring 312 rotates, and the differential case 310 does not rotate. Thus, it is possible to complete the two-wheel drive running in which the auxiliary drive wheels skid and only the main drive wheels run.

[0070] In this way, when the two side auxiliary drive wheels (not shown) skid, the rotational force of the two side auxiliary drive wheels is transmitted only to the support ring 312 through the first differential side gears 331 and the second differential side gears 332 and the first pinion 321 and the second pinion 322. In a state where the differential case 310 does not rotate, the support ring 312 rotates inside the differential case 310, so it is possible to prevent the occurrence of high differential.

[0071] Next, the operation of the disconnecter of the present invention during four-wheel drive will be described.

[0072] As Figure 2 、 Figure 3 shown, when four-wheel drive (4WD) is engaged, power is applied to the magnetic coil 445. An electromagnetic field is generated by applying power to the magnetic coil 445.

[0073] As the electromagnetic field is generated, the armature 444 of the ferromagnetic material moves in the direction of the magnetic coil 445. Due to the electromagnetic force, the stroke required for the armature 444 to be pulled in the direction of the magnetic coil 445.

[0074] The positions of the magnetic coil 445 and the clutch ring 420 are respectively set on opposite sides, and in order to connect these, an operating lever 450 is added to achieve non-contact operation and a normally open type.

[0075] The clutch ring 420 is connected and assembled to the armature 444 that moves as the magnetic coil 445 operates through the operating lever 450. Initially, it is located in the direction of the release pawl by the elastic member 430, and when power is applied to the magnetic coil 445, it can rotate synchronously with the differential case 310.

[0076] Specifically, as the armature 444 is pulled toward the magnetic coil 445 side, the clutch ring 420 connected to the armature 444 through the operating lever 450 is also pulled, thereby completing the coupling of the claw portions of the clutch ring 420 and the support ring 312.

[0077] As the clutch ring 420 moves with the operating lever 450, the first claw portion 421 is correspondingly coupled to the second claw portion 312a of the support ring 312. Thus, it can operate in the four-wheel drive (4WD) mode.

[0078] In four-wheel drive (4WD), the power of a power source such as a reduction motor is transmitted to the drive gear 340. Since the clutch ring 420 and the support ring 312 are in a state where the claw portions are coupled, the power of the power source is transmitted to the differential case 310 through the drive gear 340, causing the differential case 310 to rotate. The drive gear 340 is connected to the differential case 310 through a coupling member such as a bolt, so that the power of the power source can be transmitted to the differential case 310.

[0079] As the differential case 310 rotates, the support ring 312 inside the differential case 310 rotates. In four-wheel drive (4WD), since the clutch ring 420 and the support ring 312 are in a state where the claw portions are coupled, and the clutch ring 420 is connected to the differential case 310 through a spline S structure, the power of the power source can be transmitted to the support ring 312 through the drive gear 340, the differential case 310, and the clutch ring 420.

[0080] As the support ring 312 rotates, the power is transmitted to the first side gear 331 and the second side gear 332 that mesh with the first pinion 321 and the second pinion 322, causing the first side gear 331 and the second side gear 332 to rotate.

[0081] With the rotation of the first half-axle gear 331 and the second half-axle gear 332, power is transmitted to the auxiliary drive wheels on both sides through the drive shafts (not shown) connected to the first half-axle gear 331 and the second half-axle gear 332 on both sides. Thus, the auxiliary drive wheels on both sides can be rotated. Thereby, the power of the power source is transmitted not only to the main drive wheels but also to the auxiliary drive wheels, and thus, four-wheel drive running can be achieved.

[0082] On the other hand, when the power supply applied to the magnetic coil 445 is released, the armature 444 and the clutch ring 420 can be restored to their original positions by the elastic force of the elastic member 430.

[0083] Specifically, when the power supply applied to the magnetic coil 445 is released, the electromagnetic force disappears, and the armature 444 moves away from the magnetic coil 445 as in the initial state. As the armature 444 moves, the force pressing the clutch ring 420 of the elastic member 430 disappears, and thus, the compressed elastic member 430 elongates.

[0084] As the elastic member 430 elongates, the connection state between the clutch ring 420 and the support ring 312 is released. That is, when the first claw portion 421 of the clutch ring 420 connected to the second claw portion 312a of the support ring 312 moves away from the second claw portion 312a, the connection is released.

[0085] As the clutch ring 420 returns to its original state, the armature 444 connected to the clutch ring 420 through the operating lever 450 also returns to its original state together with the clutch ring 420.

[0086] Thus, when the power supply of the magnetic coil 445 is released, the armature 444 and the clutch ring 420 are restored to their original positions by the elastic member 430, and thus, the vehicle can operate in the two-wheel drive (2WD) mode.

[0087] In the existing disconnectors, the operating mechanism of the claw portion needs to be precisely controlled. However, in the present invention, since the first claw portion of the clutch ring is formed as a flat surface, when it is connected to the second claw portion of the support ring, due to the appropriate responsiveness between the claw portions, they can quickly contact, and by connecting with an appropriate force, precise control is not required, and a simple control system can be achieved.

[0088] In addition, in the present invention, in order to correct the magnetic force generated due to the stroke of the armature and prevent the clutch ring and the support ring from falling off during driving, a sensor for measuring displacement needs to be installed. For this purpose, although not clearly shown in the figure, a stroke sensor capable of measuring displacement can be configured to confirm whether the clutch ring and the support ring are accurately connected. The stroke sensor can be an on / off type sensor that only confirms the on / off position in terms of fail safe.

[0089] In summary, according to the present invention, the armature connected to the operating rod directly connected to the clutch ring operates in a non-contact state with the magnetic coil to complete disconnection, whereby the clutch and the support ring can be coupled. Additionally, according to the present invention, when the vehicle is traveling in a two-wheel drive (2WD) mode with the connection of the disconnecter released, the auxiliary drive wheels that coast rotate together with the support ring of the support pinion, thereby preventing the occurrence of differential height. Additionally, according to the present invention, by using a magnetic coil, the current consumption relative to the motor is low. Additionally, according to the present invention, through the non-contact rotational movement of the armature, it is beneficial for wear resistance and noise, and is embodied in a structure having a large-area electromagnetic effect between the magnetic coils, whereby its effect and responsiveness become excellent. Additionally, according to the present invention, by replacing the existing high-cost actuators such as high-current BLDC motors, ball screw shafts, and shift forks with low-cost and low-current magnetic coils, and by removing the thrust bearing, the cost can be reduced. Additionally, according to the present invention, by integrating the differential assembly and the disconnecter, the overall length can be significantly reduced, and the weight and the mountability of the package can be significantly improved. Additionally, according to the present invention, by removing large parts such as the hub and the sleeve, and by removing the bearings that support these, and by configuring the armature and the magnetic coil in a non-contact manner, the thrust bearing can be removed, reducing the number of parts. Additionally, according to the present invention, by integrating the differential assembly and the disconnecter, the assembly process can be simplified.

[0090] The above description is only an illustrative description of the technical idea of the present invention. As long as those of ordinary skill in the technical field to which the present invention pertains do not depart from the essential characteristics of the present invention, various modifications, changes, and substitutions can be made. Therefore, the embodiments and drawings disclosed in the present invention are not used to limit the technical idea of the present invention, but to illustrate the present invention. The scope of the technical idea of the present invention is not limited to such embodiments. The protection scope of the present invention should be interpreted according to the claims, and should be interpreted as including all technical ideas within the scope equivalent thereto in the claims of the present invention.

Claims

1. A disconnector, characterized in that, Comprising: A support ring, disposed inside the differential case, for supporting two pinions installed inside; A clutch ring, which performs connection or disconnection operations with the support ring inside the differential case; An actuator, which has an armature, the armature being disposed outside the differential case on the opposite side of the clutch ring, and pulling the armature connected to the clutch ring through an operating rod by electromagnetic force, thereby completing the connection between the clutch ring and the support ring; and An elastic member, connected to the operating rod portion inside the differential case, with one end contacting the differential case and the other end contacting the clutch ring to elastically support the clutch ring, wherein the actuator includes: A magnetic core, having an inclined surface arranged to face the inclined surface of the armature with an inclined surface, wherein the inclined surface of the magnetic core faces the inclined surface of the armature, and wherein the central portion of the armature and the central portion of the magnetic core are connected to a bushing; and A magnetic coil, which, when power is applied in a state of being accommodated inside the magnetic core, generates electromagnetic force to pull the armature.

2. The disconnecter according to claim 1, wherein, The magnetic core and the magnetic coil are configured in a non-contact structure with the armature.

3. The disconnector according to claim 1, wherein The magnetic coil and the magnetic core are fixed to the transmission housing and are independent of the rotation of the differential case.

4. The disconnector according to claim 1, characterized in that, An extension portion extending from one side of the differential case toward the actuator connects the bushing.

5. The disconnector according to claim 1, characterized in that, The bushing is a non-magnetic body.

6. The disconnector according to claim 1, characterized in that, It is provided with a claw portion, and the claw portion can be connected or separated from the opposing surfaces of the clutch ring and the support ring.

7. The disconnecter according to claim 1, characterized in that, The outer diameter of the clutch ring and the inner diameter of the differential case are connected through a spline structure.

8. The disconnector according to claim 1, characterized in that, One end of the operating rod is connected to the clutch ring, and the other end passes through the differential case and is connected to the armature.

9. The disconnector according to claim 1, characterized in that, The armature is a magnetic body.

10. The disconnector according to claim 1, characterized in that, A central shaft is provided inside the support ring, and the two pinions are rotatably connected on both sides of the central shaft, and on both sides of the two pinions, there are side gears meshing with the two pinions.

11. The disconnector according to claim 1, characterized in that, The side end portion of the differential case is composed of a detachable cover, and a drive gear is installed on the cover.

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