JP2014137068A - Interrupter, power transmission device using the interrupter, and vehicle drive unit using the power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interrupter which is simplified in structure and can reduce the number of part items.SOLUTION: An interrupter 1 comprises: paired rotary members 3, 5 which are arranged to be relatively rotatable to each other; an interrupting part 7 arranged between the paired rotating members 3, 5; and an actuator 9 for interruptedly operating the interrupting part 7. The interrupting part 7 is an engageable engagement clutch which is arranged between an interrupting member 11 engaged to be axially movable and integrally rotatable, to one side rotary member 3, and the another side rotary member 5. The actuator 9 has: a conversion mechanism 13 which is arranged adjacent to the interrupting member 11, and generates an axial thrust force for movably operating the interrupting member 11 in the axial direction by rotational difference; an electromagnet 17 fixed to a stationary system member 15; and a starting member 19 which is connected to the conversion mechanism 13 and braked by being connected to the electromagnet 17 when the electromagnet 17 is excited.

Description

  The present invention relates to an intermittent device applied to a vehicle, a power transmission device using the intermittent device, and a vehicle drive device using the power transmission device.

  Conventionally, as an interrupting device, an outer differential case and an inner differential case as a pair of rotating members arranged so as to be relatively rotatable, a main clutch as an intermittent portion provided between the outer differential case and the inner differential case, and the main clutch An actuator including an actuator for intermittently operating a clutch is known (for example, see Patent Document 1).

  In this intermittent device, the main clutch is a multi-plate friction clutch, and the actuator includes a ball cam, a pressure plate, a cam ring, a multi-plate pilot clutch, an armature, an electromagnet, and the like.

JP 2003-80962 A

  However, in the intermittent device as in Patent Document 1, the intermittent portion is a multi-plate friction clutch, and a multi-plate pilot clutch is applied to the actuator, and in addition, a cam mechanism, an armature, or the like is applied. The structure was complicated and the number of parts was very large.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an interrupting device that can simplify the structure and reduce the number of parts, a power transmission device that uses the interrupting device, and a vehicle drive device that uses the power transmission device.

  The present invention is an interrupting device comprising a pair of rotating members arranged to be relatively rotatable, an interrupting portion provided between the pair of rotating members, and an actuator for intermittently operating the interrupting portion, The intermittent portion is a meshable engagement clutch provided between an intermittent member that is axially movable and integrally rotatable with one rotary member of the pair of rotary members, and the other rotary member. The actuator is disposed adjacent to the intermittent member and generates an axial thrust that moves the intermittent member in the axial direction by a rotational difference; an electromagnet fixed to a stationary member; and the conversion mechanism And an activation member that is connected and braked when the electromagnet is excited.

  In this interrupting device, the interrupting portion is a meshing clutch, and the actuator has the conversion mechanism, the electromagnet, and the starting member, so that the structure can be simplified and the number of parts can be greatly reduced.

  According to the present invention, it is possible to provide an interrupting device capable of simplifying the structure and reducing the number of parts, a power transmission device using the interrupting device, and a vehicle drive device using the power transmission device. There is an effect.

1 is a cross-sectional view of an intermittent device, a power transmission device, and a vehicle drive device according to an embodiment of the present invention. It is sectional drawing of the intermittent device, power transmission device, and vehicle drive device when the intermittent device which concerns on embodiment of this invention is a connection state. It is XX sectional drawing of FIG.

  First, a power transmission device and a vehicle drive device equipped with an interrupting device according to an embodiment of the present invention will be described with reference to FIGS.

  A vehicle drive device 201 according to the present embodiment includes an electric motor (not shown), a speed reduction mechanism 203 that decelerates the driving force from the electric motor, and a driving force decelerated by the speed reduction mechanism 203 is transmitted to the wheel side. And a distribution mechanism 205 for transmitting a driving force to the motor.

  The power transmission device 101 is disposed between the electric motor and the distribution mechanism 205.

  As shown in FIGS. 1 and 2, the vehicle drive device 201 includes a casing 15, an electric motor, a speed reduction mechanism 203, a distribution mechanism 205, and a power transmission device 101.

  In the casing 15, a plurality of divided casings 18 and 20 are integrally fixed by a fixing means such as a bolt 16, and an input side accommodating portion that mainly accommodates the speed reduction mechanism 203 and an output that mainly accommodates the distribution mechanism 205. It is a side accommodating part. An electric motor is assembled on an axial side surface of the input side accommodating portion of the casing 15.

  The electric motor is assembled to the outside of the casing 15 and connected to a controller (not shown) that controls energization through a connection box, a connection terminal, and the like. An input shaft 209 of the speed reduction mechanism 203 is connected to a rotation shaft of the electric motor via a connecting portion 207 so as to be integrally rotatable.

  The speed reduction mechanism 203 is accommodated in the input side accommodating portion of the casing 15 and includes an input shaft 209, a first gear set 211, an intermediate shaft 213, a second gear set 215, and the input member 3.

  The input shaft 209 is arranged such that the rotation axis is parallel to the rotation shaft of the electric motor. The input shaft 209 is rotatably supported on the casing 15 via bearings 217 and 219 on both outer circumferences in the axial direction, and the rotary shaft of the electric motor is connected via a connecting portion 207 provided on one end side in the axial direction. It is connected so that it can rotate integrally. In addition, a seal member 221 that divides the inside of the casing 15 into a speed reduction mechanism 203 side and an electric motor side is arranged between the outer circumference on the one end side in the axial direction of the input shaft 209 and the inner circumference of the casing 15. Yes. A first small-diameter gear portion 223 is formed as one continuous member on the outer periphery of the input shaft 209 on the other axial end side, and constitutes a first large-diameter gear portion 225 and a first gear set 211.

  The first gear set 211 includes a first small diameter gear portion 223 provided on the input shaft 209 and a first large diameter gear portion 225 provided on the intermediate shaft 213. The first large-diameter gear portion 225 is fixed by a fixing means such as press-fitting so as to be integrally rotatable with the intermediate shaft 213 and meshes with the first small-diameter gear portion 223. The first gear set 211 decelerates the driving force output from the electric motor from the input shaft 209 and outputs it to the intermediate shaft 213.

  The intermediate shaft 213 has a rotational axis center arranged in parallel with the input shaft 209 and is rotatably supported by the casing 15 via bearings 227 and 229 on both outer circumferences in the axial direction. Further, one end side in the axial direction of the intermediate shaft 213 is disposed outside the casing 15 via a seal member 231 and a dust cover 233 between the radial direction of the intermediate shaft 213 and the casing 15. A rotation sensor 235 is provided at the end of the intermediate shaft 213 exposed from the casing 15 so as to be able to rotate integrally with the intermediate shaft 213. The rotation of the rotation sensor 235 is detected by detection means (not shown) connected to the controller, and rotation information of the electric motor is input to the controller, and the controller controls energization to the electric motor. A second small-diameter gear portion 237 is formed as one continuous member on the outer periphery of the intermediate shaft 213, and the second small-diameter gear portion 237 and the second large-diameter gear portion 239 constitute a second gear set 215. .

  The second gear set 215 includes a second small diameter gear portion 237 provided on the intermediate shaft 213 and a second large diameter gear portion 239 provided on the input member 3. The second large diameter gear portion 239 is fixed to the outer periphery of the input member 3 through a fixing means such as a bolt so as to be integrally rotatable, and meshes with the second small diameter gear portion 237. The second gear set 215 further reduces the driving force decelerated by the first gear set 211 output from the intermediate shaft 213 and outputs it to the input member 3.

  The input member 3 is formed in a case shape, and its rotational axis is arranged in parallel with the intermediate shaft 213 so that it can rotate to the casing 15 via bearings 241 and 243 on the outer periphery of the boss provided on both sides in the axial direction. It is supported. The input member 3 receives the driving force decelerated from the intermediate shaft 213 via the second gear set 215 and outputs it to the distribution mechanism 205 accommodated therein via the intermittent portion 7.

  The distribution mechanism 205 is accommodated in the input member 3 in the output side accommodating portion of the casing 15, and includes a differential mechanism including an inner case 5, a pinion shaft 245, a pinion 247, and a pair of side gears 249 and 251. .

  The inner case 5 has a rotational axis disposed in parallel with the input member 3 and is accommodated in the input member 3 so as to be rotatable relative to the input member 3. The inner case 5 accommodates a pinion shaft 245, a pinion 247, and a pair of side gears 249 and 251.

  An end of the pinion shaft 245 is engaged with the inner case 5 and is prevented from being detached by a retaining member such as a pin, and is rotated and driven integrally with the inner case 5. A pinion 247 is supported on the pinion shaft 245.

  A plurality of pinions 247 are arranged at equal intervals in the circumferential direction of the inner case 5, supported by the pinion shaft 245, and revolved by the rotation of the inner case 5. In addition, a spherical washer that receives movement of the pinion 247 in the radial direction is arranged between the rear side of the pinion 247 and the inner case 5. The pinion 247 transmits a driving force to the pair of side gears 249 and 251 and is rotatably supported by the pinion shaft 245 so as to be driven to rotate when a differential rotation occurs between the pair of side gears 249 and 251 engaged with each other. Yes.

  The pair of side gears 249 and 251 are supported by the input member 3 so as to be rotatable relative to each other by boss portions formed respectively, and mesh with the pinion 247. Thrust washers that receive movement in the axial direction of the side gears 249 and 251 by the meshing reaction force with the pinion 247 are disposed between the side gears 249 and 251 and the input member 3 in the axial direction.

  The pair of side gears 249 and 251 are provided with spline-shaped connecting portions on the inner peripheral side, respectively. For example, drive shafts (not shown) connected to left and right wheels (not shown) so as to be integrally rotatable are respectively side gears 249 and 249. The driving force input to the inner case 5 is output to the left and right wheels via the driving shaft. Seal members 253 and 255 that divide the inside and the outside of the casing 15 are arranged between the drive shaft connected to the pair of side gears 249 and 251 and the casing 15 in the radial direction.

  In the power transmission apparatus 101, the driving force transmitted to the distribution mechanism 205 is input to the input member 3 as one rotating member that inputs the driving force and the inner case 5 as the other rotating member that outputs the driving force. Is intermittently provided by an intermittent portion 7 provided between the two. A mechanism in which the intermittent portion 7 is disposed between the input member 3 and the inner case 5 as in the power transmission device 101 is a so-called free running differential.

  In such a power transmission device 101, the intermittent device 1 is mounted. Hereinafter, the interrupting device according to the embodiment of the present invention will be described with reference to FIGS.

  The interrupting device 1 according to the present embodiment includes an input member 3 and an inner case 5 as a pair of rotating members arranged so as to be relatively rotatable, and an interrupting portion provided between the input member 3 and the inner case 5. 7 and an actuator 9 for intermittently operating the intermittent portion 7.

  The intermeshing portion 7 is an intermeshing engagement clutch provided between an intermittence member 11 that is axially movable and integrally rotatable with the input member 3 and the inner case 5. A conversion mechanism 13 that is arranged adjacent to the intermittent member 11 and generates an axial thrust to move the intermittent member 11 in the axial direction by a rotational difference; an electromagnet 17 fixed to a casing 15 as a stationary member; and a conversion mechanism 13 And an activation member 19 that is coupled to the electromagnet 17 to be braked when the electromagnet 17 is excited.

  Further, a cam for moving the intermittent member 11 in the connecting direction of the intermittent portion 7 is provided at the engaging portion 21 between the input member 3 and the intermittent member 11.

  As shown in FIGS. 1 to 3, the intermittent member 11 is formed in an annular shape, and a base portion 23 formed of one member continuous in the circumferential direction is between the wall portion of the input member 3 and the inner case 5 in the axial direction. It is arranged to be movable in the axial direction. On the wall portion side of the input member 3 of the intermittent member 11, an engaging portion 21 that engages with the input member 3 so as to be integrally rotatable is provided.

  The engaging portion 21 includes a plurality of convex portions 25 provided at equal intervals in the circumferential direction on the base portion 23 of the intermittent member 11 and an axial hole 27 provided so as to penetrate the wall portion of the input member 3 at equal intervals in the circumferential direction. It consists of. By engaging the convex portion 25 and the axial hole 27 in the rotational direction, the intermittent member 11 is prevented from rotating around the input member 3, and the intermittent member 11 and the input member 3 can rotate together.

  Such an engaging portion 21 is provided with a cam for moving the intermittent member 11 in the connecting direction of the intermittent portion 7. More specifically, cam surfaces 29 and 31 having the same inclination are formed on opposite surfaces of the convex portion 25 and the axial hole 27 on both sides in the circumferential direction. Therefore, when the intermittent member 11 is moved in the connecting direction of the intermittent portion 7 and a meshing action in the rotational direction occurs in the intermittent portion 7 between the input member 3 and the inner case 5, the cam is caused by the rotation of the input member 3. By engaging the surfaces 29 and 31, the intermittent member 11 is further moved in the meshing direction of the intermittent portion 7 and the connection of the intermittent portion 7 is strengthened. The intermittent portion 7 is provided on the side surface of the base 23 on the opposite side in the axial direction of the engaging portion 21 of the intermittent member 11.

  The intermittent portion 7 is provided between the intermittent member 11 and the inner case 5 in the axial direction, and a plurality of intermittent portions 7 are formed in the circumferential direction of the intermittent member 11 and the inner case 5 to be meshed with each other. Further, the intermittent member 11 is an inner peripheral side of the base 23 of the intermittent member 11 and is attached to an annular support portion 4 extending in the axial direction from the wall portion side of the input member 3 to the side gear 251 side. The urging force is applied in the disconnection direction of the intermittent portion 7 by the return spring 33 whose axial movement is restricted by the restriction member.

  This intermittent portion 7 is connected so that the intermittent member 11 and the inner case 5 can be integrated with each other by meshing the meshing teeth of each other, that is, in the power transmission device 101, the input member 3 and the inner case 5 are connected so as to be integrally rotatable. In the vehicle drive device 201, power transmission between the speed reduction mechanism 203 and the distribution mechanism 205 becomes possible. Such an intermittent portion 7 is intermittently operated in a controllable manner by an actuator 9 that moves the intermittent member 11 in the axial direction.

  The actuator 9 includes a conversion mechanism 13, an electromagnet 17, and an activation member 19. The conversion mechanism 13 includes a pressing member 35, a cam ring 37, and a cam ball 39. The pressing member 35 is disposed adjacent to the intermittent member 11 in the axial direction on the outer peripheral side of the boss portion of the input member 3 and is disposed so as to be movable in the axial direction. The pressing member 35 is in contact with a sliding portion 41 that protrudes from the end face of the projecting portion 25 of the intermittent member 11 facing the axial direction. By bringing the pressing member 35 into contact with such a sliding portion 41, the sliding area between the intermittent member 11 and the pressing member 35 can be greatly reduced, and the cam thrust force in the engaging portion 21 and the conversion mechanism 13 can be reduced. Can be prevented.

  The cam ring 37 is rotatably disposed on the outer periphery of the boss portion of the input member 3. Further, the cam ring 37 is restricted from axial movement by the restriction member such as the needle bearing 38 and the snap ring 40 on the input member 3 to restrict the axial movement of the cam ring 37 and receives a thrust reaction force generated by the conversion mechanism 13. A thrust bearing 38 is in contact. A plurality of cam surfaces are formed in the circumferential direction between the cam ring 37 and the pressing member 35 in the axial direction, and cam balls 39 are interposed between the cam surfaces.

  The cam ball 39 has a plurality of cam surfaces formed in the circumferential direction facing the cam ring 37 and the pressing member 35 and is interposed between these cam surfaces. The cam ball 39 generates a cam thrust force that axially moves the pressing member 35 toward the intermittent member 11 when a differential rotation occurs between the cam ring 37 and the pressing member 35 due to braking of the starting member 19 by excitation of the electromagnet 17. generate.

  The electromagnet 17 is disposed on the outer peripheral side of the boss portion of the input member 3 and is prevented from rotating with respect to the casing 15 as a stationary system member. The electromagnet 17 has an electromagnetic coil that is annularly wound with a predetermined number of turns and molded with resin, and the electromagnetic coil is connected to a controller that controls energization. A core made of a magnetic material and having a predetermined magnetic path cross-sectional area is disposed around the electromagnetic coil so that a magnetic field is formed by energization of the electromagnetic coil. An activation member 19 is disposed adjacent to the electromagnet 17 on the conversion mechanism 13 side in the axial direction.

  The starting member 19 is formed in an annular shape, and is engaged with the outer periphery of the cam ring 37 so as to be integrally rotatable with the cam ring 37. The starting member 19 is attracted and moved to the electromagnet 17 side by the excitation of the electromagnet 17 and is connected to the electromagnet 17 to be braked. Due to the braking of the starting member 19, a rotational difference is generated between the cam ring 37 and the pressing member 35, and a cam thrust force is generated by the conversion mechanism 13. In addition, the mechanism comprised by the starting member 19 and the electromagnet 17 is what is called an electromagnetic brake.

  In the interrupting device 1 configured as described above, the activation member 19 is attracted and moved to the electromagnet 17 side by energization of the electromagnetic coil of the electromagnet 17 to brake the activation member 19. Due to the braking of the starting member 19, an axial thrust is generated in the conversion mechanism 13, and the pressing member 35 presses the intermittent member 11 in the connecting direction of the intermittent portion 7 against the urging force of the return spring 33. When the meshing clutch is engaged in the rotational direction, a cam thrust force is generated at the engaging portion 21, and the urging force of the intermittent member 11 against the urging force of the return spring 33 is strengthened in the connecting direction of the intermittent portion 7. The connection of the intermittent part 7 is maintained.

  With the connection of the intermittent portion 7, the input member 3 and the inner case 5 are connected in the power transmission device 101, and the driving force decelerated by the speed reduction mechanism 203 is transmitted to the distribution mechanism 205 in the vehicle drive device 201. .

  In order to cancel the intermittent action from the connected state of the intermittent portion 7, the energization of the electromagnet 17 is stopped, the braking of the starting member 19 is released, and the intermittent member 11 is disconnected by the urging force of the return spring 33. It is released by moving in the axial direction in the connection release direction.

  When the intermittent portion 7 is in a connected state with rotational driving torque input from the input member 3, the sliding portion 41, which is the end surface of the convex portion 25 of the intermittent member 11, is caused by the pressing member 37 due to the cam action of the engaging portion 21. Even without receiving thrust, the connection state can be maintained by itself. That is, the brake action (energization) of the electromagnet 17 with respect to the starting member 19 can be reduced.

  Due to the disconnection of the intermittent portion 7, the power transmission between the input member 3 and the inner case 5 is interrupted in the power transmission device 101, and in the vehicle drive device 201, for example, rotation of the left and right wheels by traveling of the vehicle Is not input from the distribution mechanism 205 to the speed reduction mechanism 203, and the fuel efficiency of the vehicle can be improved.

  In such an interrupting device 1, since the interrupting part 7 is a meshing clutch and the actuator 9 has the conversion mechanism 13, the electromagnet 17 and the starting member 19, the structure can be simplified and the number of parts is greatly reduced. can do.

  Further, since the engaging portion 21 between the input member 3 and the intermittent member 11 is provided with a cam for moving the intermittent member 11 in the connecting direction of the intermittent portion 7, the axial operation force of the intermittent member 11 by the actuator 9 is provided. The actuator 9 can be reduced in size.

  Furthermore, in the power transmission device 101, since the input member 3 is a member for inputting driving force and the inner case 5 is a member for outputting driving force, the structure of the transmission path for transmitting the driving force can be simplified. it can.

  Further, in the vehicle drive device 201, the power transmission device 101 is disposed between the electric motor and the distribution mechanism 205. Therefore, by applying the power transmission device 101 with a simplified structure and a reduced number of parts. The mounting property on the vehicle can be improved.

  In the intermittent device according to the embodiment of the present invention, the cam is provided in the engaging portion between the input member and the intermittent member. However, when the operating force of the intermittent member can be obtained only by the actuator, the engaging portion There is no need to provide a cam.

  Moreover, in the power transmission device according to the embodiment of the present invention, it is a free running differential, and the interrupting device is configured to interrupt power transmission. However, the present invention is not limited to this, and for example, the power transmission device is differentially locked. A differential device having a function may be used, and the interrupting device may be configured to interrupt the differential of the differential mechanism. In addition, the input / output relationship between the pair of rotating members may be any as long as the driving force can be input / output.

  Furthermore, in the vehicle drive device according to the embodiment of the present invention, an electric motor is applied as a drive source. However, the drive source is not limited to this, for example, two electric motors, an engine, an engine, and an electric motor. May take any form.

DESCRIPTION OF SYMBOLS 1 ... Intermittent device 3 ... Input member (rotating member)
5 ... Inner case (rotating member)
7 ... Intermittent part 9 ... Actuator 11 ... Intermittent member 13 ... Conversion mechanism 15 ... Casing (stationary system member)
DESCRIPTION OF SYMBOLS 17 ... Electromagnet 19 ... Starting member 21 ... Engagement part 101 ... Power transmission device 201 ... Vehicle drive device 203 ... Deceleration mechanism 205 ... Distribution mechanism

Claims (4)

An intermittent device comprising a pair of rotating members arranged to be relatively rotatable, an intermittent portion provided between the pair of rotational members, and an actuator for intermittently operating the intermittent portion,
The intermittent portion is a meshable meshing clutch provided between an intermittent member that is axially movable and integrally rotatable with one rotary member of the pair of rotary members, and the other rotary member. And
The actuator is connected to the conversion mechanism, and is disposed adjacent to the intermittent member and generates an axial thrust that moves the intermittent member in the axial direction by a rotational difference, an electromagnet fixed to a stationary member, and the conversion mechanism. And a starting member that is connected to the electromagnet to be braked when the electromagnet is excited. The intermittent device according to claim 1,
The intermittent device, wherein the engaging portion between the one rotating member and the intermittent member is provided with a cam for moving the intermittent member in the connecting direction of the intermittent portion. A power transmission device comprising the interrupting device according to claim 1 or 2,
The one rotation member is one member of a member that inputs and outputs a driving force, and the other rotation member is the other member of a member that inputs and outputs a driving force. A vehicle drive device comprising the power transmission device according to claim 3,
An electric motor, a deceleration mechanism that decelerates the driving force from the electric motor, and a distribution mechanism that transmits the driving force to the wheel side by transmitting the driving force decelerated by the deceleration mechanism,
The vehicle drive device, wherein the power transmission device is disposed between the electric motor and the distribution mechanism.

Images