JP7264787B2 - Driving force transmission device and vehicle - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving force transmission device for transmitting driving force of a drive source, and a vehicle equipped with the driving force transmission device.

Conventionally, in a four-wheel drive vehicle capable of driving both the front and rear wheels, the driving force is always transmitted to one of the front and rear wheels, the main drive wheel, and the other of the front and rear wheels is driven depending on the vehicle condition. Some auxiliary driving wheels also transmit driving force. Such a four-wheel drive vehicle is equipped with a clutch in a transfer that distributes driving force to the front and rear wheels, as described in Patent Document 1, for example. drive power to the side.

JP 2018-187996 A

A plurality of shafts extending in the longitudinal direction of the vehicle are arranged in the transfer of the four-wheel drive vehicle configured as described above. Bearings that rotatably support these shafts are lubricated by lubricating oil contained within the transfer case. When the vehicle is horizontal, at least a portion of the bearing is immersed in lubricating oil and rotates, so a good lubricating state is maintained. may be located in

For example, the bearing that supports the rear end of the shaft in the longitudinal direction of the vehicle runs out of oil when the vehicle stops on a downhill road. and wear may increase.

Accordingly, the present invention provides a driving force transmission device capable of supplying lubricating oil to a bearing that supports a shaft that transmits driving force even when the vehicle travels in an inclined state with respect to the horizontal direction, and a driving force transmission device therefor. An object of the present invention is to provide a vehicle equipped with a driving force transmission device.

In order to achieve the above object, the present invention provides a shaft that rotates under the driving force of a vehicle drive source, a cover member provided with an insertion hole through which the shaft is inserted, and an inner peripheral surface of the insertion hole. and the outer peripheral surface of the shaft, a clutch arranged on the outer periphery of the shaft, a clutch housing that accommodates the clutch, a pressing device that presses the clutch, and the clutch housing. and an oil guiding member for guiding lubricating oil in the case member, which is raked up by rotation of the clutch housing, to the bearing, wherein the oil guiding member is inserted into an accommodating portion formed in the cover member. A driving force transmission device is provided in which the movement of the oil guiding member in the axial direction of the shaft is restricted by the constituent members of the pressing device.

Further, in order to achieve the above object, the present invention provides a vehicle having drive wheels to which the driving force of a drive source is transmitted via the above-described driving force transmission device, wherein the shaft extends in the longitudinal direction of the vehicle. The oil guiding member includes a first oil guiding portion that has an introduction portion into which the lubricating oil is introduced and extends in the longitudinal direction of the vehicle, and a first oil guiding portion that leads the lubricating oil to the bearing side. and a second oil guide portion extending in the vehicle width direction, the first oil guide portion having a lead-out portion to guide the lubricating oil introduced into the guide portion to the second oil guide portion side To provide a vehicle inclined to flow down.

According to the present invention, it is possible to supply lubricating oil to the bearings that support the shaft that transmits the driving force even when the vehicle travels in a state inclined with respect to the horizontal direction.

1 is a schematic configuration diagram schematically showing a configuration example of a vehicle according to an embodiment of the invention; FIG. 1 is a cross-sectional view of a driving force transmission device; FIG. FIG. 3 is an enlarged view showing an enlarged part of FIG. 2; 3 is an exploded perspective view showing a cover member, electromagnetic coils and yokes, bearings, and an oil guiding member; FIG. (a) to (c) are perspective views showing an oil guiding member. FIG. 4 is a configuration diagram showing an oil guiding member accommodating portion of the oil guiding member formed in the cover member and its peripheral portion; (a) is a configuration diagram showing a state in which a yoke holding an electromagnetic coil, a bearing, and an oil guide member are assembled to a cover member, as viewed from the axial direction, and (b) is an AA of (a). FIG. 4 is a cross-sectional view showing a line cross-section together with a portion of the transfer case; (a) and (b) are perspective views showing states before and after an oil guide member is accommodated in an oil guide member accommodation portion of a cover member.

[Embodiment]
An embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. It should be noted that the embodiment described below is shown as a preferred specific example for carrying out the present invention, and there are portions that specifically illustrate various technically preferable technical matters. , the technical scope of the present invention is not limited to this specific embodiment.

FIG. 1 is a schematic configuration diagram schematically showing a configuration example of a vehicle according to an embodiment of the invention. This vehicle 1 is a four-wheel drive vehicle capable of driving left and right front wheels 101 and 102 and left and right rear wheels 103 and 104 . The vehicle 1 has an engine 11 as a drive source, and rotation of an output shaft of the engine 11 is changed by a transmission 12 and output to a transfer 13 . An electric motor may be used as the drive source, or a so-called hybrid system combining an engine and an electric motor may be used as the drive source.

In this embodiment, the driving force of the engine 11 is always transmitted to the rear wheels 103 and 104, and the driving force of the engine 11 is transmitted to the front wheels 101 and 102 according to the vehicle state. That is, in the present embodiment, rear wheels 103 and 104 are main driving wheels, and front wheels 101 and 102 are auxiliary driving wheels. Driving force is transmitted to the front wheels 101 and 102, for example, during acceleration or when the rear wheels 103 and 104 slip.

The vehicle 1 includes a propeller shaft 14 and a differential device 15 on the front wheel side. The propeller shaft 14 on the front wheel side transmits the driving force output from the transfer 13 to the front wheel side to the differential device 15 . The differential device 15 distributes the driving force input from the propeller shaft 14 to the left and right front wheels 101 and 102 via the left and right drive shafts 151 and 152 .

The vehicle 1 also includes a propeller shaft 16 and a differential device 17 on the rear wheel side. The propeller shaft 16 on the rear wheel side transmits the driving force output from the transfer 13 to the rear wheel side to the differential device 17 . The differential device 17 distributes the driving force input from the propeller shaft 16 to the left and right rear wheels 103 and 104 via the left and right drive shafts 161 and 162 .

The transfer 13 includes a shaft 2 that rotates by receiving the driving force of the engine 11, a cover member 3 provided with an insertion hole 30 through which the shaft 2 is inserted, a clutch 4 that is arranged on the outer periphery of the shaft 2, and the clutch 4. , a pressing device 6 for pressing the clutch 4 , and a transfer case 7 as a case member for storing the clutch housing 5 . The transfer case 7 opens toward the rear side of the vehicle, and the opening is closed by the cover member 3 .

The shaft 2 is arranged to extend in the longitudinal direction of the vehicle, and has an end on the front side of the vehicle connected to the output shaft 121 of the transmission 12 and an end on the rear side of the vehicle connected to the propeller shaft 16 on the rear wheel side. there is As a result, the driving force of the engine 11 is constantly transmitted to the rear wheels 103 and 104 .

The transfer 13 includes a front-wheel output shaft 131 connected to the front-wheel propeller shaft 14, a sprocket 132 rotating integrally with the front-wheel output shaft 131, and a chain 133 wound around the clutch housing 5 and the sprocket 132. and The driving force transmitted from the shaft 2 to the clutch housing 5 via the clutch 4 is transmitted from the sprocket 132 via the chain 133 to the front wheel side output shaft 131 to the front wheel side propeller shaft 14 . As a result, the driving force of the engine 11 is intermittently transmitted to the front wheels 101 and 102 via the clutch 4 . The clutch housing 5 and the front-wheel-side output shaft 131 may be connected by meshing gears.

The shaft 2, the cover member 3, the clutch 4, the clutch housing 5, the pressing device 6, and the transfer case 7 constitute a driving force transmission device 10 according to the present invention together with bearings and oil guiding members which will be described later. The driving force transmission device 10 will be described in detail below.

FIG. 2 is a cross-sectional view of the driving force transmission device 10. As shown in FIG. 3 is an enlarged view showing an enlarged part of FIG. 2. FIG. In FIG. 2, the driving force transmission device 10 is shown in a vertical cross section along the rotation axis O of the shaft 2, and the lower side of the drawing corresponds to the lower side in the vertical direction. In FIG. 2, the left side of the drawing corresponds to the front in the longitudinal direction of the vehicle, and the right side of the drawing corresponds to the rear in the longitudinal direction of the vehicle. In the following description, "forward" means forward in the longitudinal direction of the vehicle, and "rearward" means backward in the longitudinal direction of the vehicle.

A fitting hole 21 into which an output shaft 121 of the transmission 12 is fitted is provided at the front end of the shaft 2 protruding from the transfer case 7 . A spline fitting portion 22 in which a connecting member (not shown) for connecting the propeller shaft 16 on the rear wheel side is fitted to the rear end portion of the shaft 2 inserted through the insertion hole 30 of the cover member 3 . , and a male threaded portion 23 into which a nut (not shown) for fixing this connecting member is screwed. The cover member 3 is fixed to the transfer case 7 by a plurality of bolts 301, one of which is shown in FIG.

Between the inner peripheral surface 30 a of the insertion hole 30 of the cover member 3 and the outer peripheral surface 2 a of the shaft 2 , a bearing 8 is arranged to support the shaft 2 rotatably with respect to the cover member 3 . In this embodiment, the bearing 8 is a rolling bearing, more specifically, a ball bearing in which a plurality of balls 83 as rolling elements are arranged in a bearing space 80 between an inner ring 81 and an outer ring 82 . The rolling elements are not limited to the balls 83, and may be cylindrical rollers or tapered rollers. The bearing 8 is arranged behind the clutch 4 , the clutch housing 5 and the pressing device 6 .

The clutch 4 includes a plurality of inner clutch plates 41 engaged with the shaft 2 so as to be axially movable and non-rotatable, and a plurality of outer clutch plates 41 axially movably and non-rotatably engaged with the clutch housing 5 . It is a multi-plate clutch having clutch plates 42 and in which inner clutch plates 41 and outer clutch plates 42 are alternately arranged. A plurality of spline projections 20 with which the inner clutch plate 41 engages are formed on the outer peripheral surface of the shaft 2 .

The clutch housing 5 has a bottomed cylindrical first housing member 51 and a second housing member 52 fixed to the rear end of the first housing member 51 . The first housing member 51 is made of non-magnetic metal such as aluminum alloy, and the second housing member 52 is made of magnetic metal such as iron. The second housing member 52 is formed with an annular recess 520 that opens rearward and accommodates an electromagnetic coil 62, which will be described later.

The first housing member 51 includes a cylindrical portion 511 that accommodates the clutch 4 , an annular bottom portion 512 that is provided at the front end of the cylindrical portion 511 , and a bottom portion 512 that extends forward from the inner diameter side end of the bottom portion 512 . It integrally has a sprocket portion 513 provided to extend. A plurality of spline projections 50 with which the outer clutch plate 42 engages are formed on the inner peripheral surface of the cylindrical portion 511 . A chain 133 (see FIG. 1) is wound around the outer circumference of the sprocket portion 513 . 2, illustration of the chain 133 is omitted.

A pair of radial bearings 501 and 502 and seal members 503 and 504 are arranged between the shaft 2 and the bottom 512 and second housing member 52 of the clutch housing 5 of the first housing member 51 . Radial bearings 501 and 502 rotatably support clutch housing 5 with respect to shaft 2 . Sealing members 503 and 504 prevent leakage of the clutch oil sealed in clutch housing 5 .

The clutch 4 transmits driving force between the shaft 2 and the clutch housing 5 by frictionally contacting the plurality of inner clutch plates 41 and the plurality of outer clutch plates 42 under pressure from the pressing device 6 . . The pressing device 6 axially presses the clutch 4 toward the bottom portion 512 of the first housing member 51 .

The pressing device 6 includes an electromagnetic clutch mechanism 61, an annular electromagnetic coil 62 that generates an electromagnetic force for operating the electromagnetic clutch mechanism 61, a yoke 63 that supports the electromagnetic coil 62, and a rotational force transmitted by the electromagnetic clutch mechanism 61. into a pressing force for pressing the clutch 4 . An exciting current is supplied to the electromagnetic coil 62 from the control device 18 (see FIG. 1). The control device 18 adjusts the magnitude of the exciting current by PWM control based on vehicle conditions such as vehicle speed, steering angle, rotational speed of the front wheels 101, 102 and rear wheels 103, 104, and accelerator opening.

The electromagnetic clutch mechanism 61 includes a plurality of outer clutch plates 611 that engage with the spline projections 50 of the clutch housing 5 , a plurality of inner clutch plates 612 that are alternately arranged with the plurality of outer clutch plates 611 , and an electromagnetic coil 62 . and an armature 613 that presses the plurality of outer clutch plates 611 and the plurality of inner clutch plates 612 toward the second housing member 52 by force. The outer clutch plate 611 and the inner clutch plate 612 are made of a magnetic metal such as iron, and are provided with a plurality of arcuate slits in the radial central portion to prevent short-circuiting of magnetic flux.

The cam mechanism 64 includes a pilot cam member 641 having a plurality of spline projections 640 formed on its outer peripheral surface with which the inner clutch plate 612 engages, a main cam member 642 arranged closer to the clutch 4 than the pilot cam member 641, a pilot It has a plurality of rolling elements 643 arranged between the cam member 641 and the main cam member 642 and a retainer 644 that holds the plurality of rolling elements 643 .

The pilot cam member 641 is rotatable relative to the shaft 2 and the clutch housing 5 , and axial movement away from the main cam member 642 is restricted by thrust roller bearings 645 . The main cam member 642 is engaged with the spline projection 20 of the shaft 2 and is axially movable with respect to the shaft 2 and relatively non-rotatable.

The pilot cam member 641 has a plurality of cam grooves 641 a extending in an arc shape along the circumferential direction on the surface facing the main cam member 642 . Similarly, the main cam member 642 has a plurality of cam grooves 642a extending in an arc shape along the circumferential direction on the surface facing the pilot cam member 641 . The cam grooves 641a and 642a are formed such that the axial depth is the deepest at the circumferential central portion, and the axial depth gradually decreases toward the circumferential ends.

When the pilot cam member 641 rotates with respect to the shaft 2 by the rotational force transmitted by the electromagnetic clutch mechanism 61, the rolling elements 643 roll on the cam grooves 641a and 642a. As a result, the main cam member 642 axially presses the clutch 4 . This pressing force changes according to the exciting current supplied to the electromagnetic coil 62 .

The yoke 63 is made of a magnetic metal such as iron. It integrally has a boss portion 633 for leading out the electric wire 621 to be supplied. The receiving portion 631 protrudes forward from the annular portion 632 . The boss portion 633 protrudes radially outward from the annular portion 632 . The electric wire 621 is led out through a grommet 71 arranged between the cover member 3 and the transfer case 7 .

Lubricating oil L is stored in the transfer case 7 . This lubricating oil L is, for example, gear oil having a viscosity suitable for lubricating gears, and mainly lubricates the meshing portions between the chain 133 and the sprockets 513 and 132 and the bearings 8 . When the vehicle 1 is horizontal and the clutch housing 5 is not rotating, the oil level of the lubricating oil L is higher than the lower end portion of the bearing space 80 in the bearing 8 .

By the way, when the vehicle 1 stops on a slope, the entire bearing 8 may be positioned above the oil surface of the lubricating oil L. In the present embodiment, since the bearing 8 is positioned behind the clutch housing 5, the entire bearing 8 is positioned above the oil surface of the lubricating oil L when the vehicle stops on a steep downhill slope. may be located. In this state, the lubricating oil L in the bearing space 80 will flow down, and if the lubricating oil L is not supplied to the bearings 8 even when the vehicle 1 is traveling downhill after that, the bearings 8 will be in a non-lubricated state and the balls 83 will fall off the inner ring 81 . And the outer ring 82 will roll, and the rotational resistance and wear will increase.

Therefore, the driving force transmission device 10 according to the present embodiment is provided with an oil guiding member that guides the lubricating oil L in the transfer case 7 that has been raked up by the rotation of the clutch housing 5 to the bearing 8. Lubricating oil L can be supplied to the bearings 8 even when the vehicle 1 runs at an inclination with respect to the horizontal direction at such an angle that the entire bearing 8 is positioned above the oil surface of the lubricating oil L. and The configuration and mounting structure of the oil guide member will be described in detail below with reference to FIGS.

4 is an exploded perspective view showing the cover member 3, the electromagnetic coil 62 and the yoke 63, the bearing 8, and the oil guiding member 9. FIG. 5(a) to (c) are perspective views showing the oil guiding member 9. FIG. FIG. 6 is a configuration diagram showing the oil guiding member accommodating portion 32 of the oil guiding member 9 formed in the cover member 3 and its peripheral portion. FIG. 7(a) is an axial view showing a state in which the yoke 63 holding the electromagnetic coil 62, the bearing 8, and the oil guide member 9 are assembled to the cover member 3, and FIG. 7(b). 7A is a cross-sectional view showing a cross section taken along the line AA of FIG. 7A together with a part of the transfer case 7. FIG. 8A and 8B are perspective views showing states before and after the oil guiding member 9 is accommodated in the oil guiding member accommodating portion 32 of the cover member 3. FIG. In FIGS. 6 and 7A, the lower side of the drawing corresponds to the lower side in the vertical direction.

The cover member 3 is a die-cast molding. As shown in FIG. 4 , the cover member 3 includes a bearing accommodating portion 31 that accommodates the bearing 8 , an oil guiding member accommodating portion 32 that accommodates the oil guiding member 9 , and a boss portion that accommodates the boss portion 633 of the yoke 63 . A housing portion 33, a grommet housing portion 34 for housing the grommet 71, and a plurality of bolt insertion holes 35 for inserting bolts 302 (see FIG. 2) for fixing the yoke 63 are formed. A portion of the bearing 8 in the axial direction protrudes from the bearing accommodating portion 31 toward the clutch housing 5, and a portion of the yoke 63 is fitted onto the protruding portion.

Further, the cover member 3 is formed with a mounting surface 3a to which the annular portion 632 of the yoke 63 is mounted. The mounting surface 3 a is a plane perpendicular to the direction parallel to the rotation axis O of the shaft 2 . The plurality of bolt insertion holes 35 are open to the mounting surface 3a, extend perpendicularly to the mounting surface 3a, and penetrate the cover member 3. As shown in FIG. A threaded hole 630 (see FIG. 2) into which the bolt 302 is screwed is formed in the annular portion 632 of the yoke 63 .

The bearing accommodating portion 31 is formed as an annular recess recessed along the rotation axis O from the mounting surface 3a. As shown in FIGS. 6 and 7 , the oil guiding member accommodating portion 32 extends radially outward from the bearing accommodating portion 31 from one of both horizontal end portions of the bearing accommodating portion 31 . It is formed to extend. A notch 36 (see FIG. 4) is formed at the other end of the horizontal ends of the bearing accommodating portion 31 .

Further, the cover member 3 has a flange portion 37 for attachment to the transfer case 7, and a plurality of bolts 301 (see FIG. 2) that are respectively inserted through a plurality of bolt insertion holes 370 provided in the flange portion 37. is fixed to the transfer case 7 by A contact surface 37 a of the flange portion 37 with the transfer case 7 is a plane perpendicular to the direction parallel to the rotation axis O of the shaft 2 .

The oil guiding member accommodating portion 32 is recessed rearward from a contact surface 37 a of the flange portion 37 . As shown in FIG. 6, the inner surface of the oil guiding member accommodating portion 32 includes a back side end face 32a that is the back side end face in the recess direction, an outermost outer end face 32b in the radial direction of the bearing 8, and a back side end face 32a. and a lower surface 32c below the outer end surface 32b in the vertical direction, and an upper surface 32d facing the lower surface 32c. The outer end surface 32b, the lower surface 32c, and the upper surface 32d are slightly inclined with respect to the direction parallel to the rotation axis O by a draft angle that facilitates demolding. The lower surface 32c and the upper surface 32d are inclined downward in the vertical direction toward the bearing 8 when viewed in the axial direction shown in FIG.

Further, the cover member 3 is provided with a plurality of fitting holes 320 that are recessed in a direction parallel to the rotation axis O from the inner end surface 32a of the oil guiding member accommodating portion 32 . In this embodiment, two fitting holes 320 are formed to open in the rear end surface 32a.

The oil guiding member 9 is made of resin such as 66 nylon, and is injection molded. As shown in FIGS. 5A to 5C, the oil guide member 9 includes a first oil guide portion 91 extending in the vehicle front-rear direction and a second oil guide portion 92 extending in the vehicle width direction. have. The first oil guiding portion 91 has an introducing portion 910 into which the lubricating oil L is introduced. The second oil guiding portion 92 has a lead-out portion 920 for leading the lubricating oil L to the bearing 8 side. The lubricating oil L introduced into the introduction portion 910 flows from the first oil passage 900 a of the first oil introduction portion 91 to the second oil passage 900 b of the second oil introduction portion 92 and is led out from the lead-out portion 920 .

When the oil guiding member 9 is mounted on the vehicle 1 , the first oil passage 900 a is inclined downward in the vertical direction toward the second oil guiding portion 92 side, and the second oil passage 900 b extends downward toward the leading portion 920 . It is housed in the oil guiding member housing portion 32 so as to incline downward in the vertical direction toward the side. As a result, the lubricating oil L introduced into the introduction portion 910 flows down the first oil passage 900a toward the second oil introduction portion 92 by gravity, further flows down the second oil passage 900b, and is led out from the lead-out portion 920, It is supplied to the bearing space 80 of the bearing 8 . When the vehicle 1 is in a horizontal state, the inclination angle of the first oil passage 900a with respect to the horizontal direction is desirably equal to or greater than the angle assumed as the maximum inclination of the slope on which the vehicle 1 travels downhill, for example 15°. It is desirable to be above.

The first oil guiding portion 91 forms a first oil passage 900a between a bottom plate 911, an outer side wall 912 facing the outer end surface 32b of the oil guiding member accommodating portion 32 above the bottom plate 911, and the outer side wall 912. It has an inner side wall 913 and a leg portion 914 which is provided below the bottom plate 911 and faces the outer end surface 32b of the oil guiding member accommodating portion 32 and contacts the lower surface 32c of the oil guiding member accommodating portion 32 .

The second oil guide portion 92 includes a bottom plate 921, a back side wall portion 922 facing the back end surface 32a of the oil guide member accommodating portion 32, and a front side wall portion 923 forming a second oil passage 900b between the back side wall portion 922 and the back side wall portion 922. and a plurality of protrusions 924 that protrude from the inner side wall portion 922 and fit into the fitting holes 320 . In the present embodiment, each projection 924 has a cylindrical shape, but the shape of the projections 924 is not limited to this, and may be polygonal or cylindrical, for example. Further, in the present embodiment, the protrusion 924 is loosely fitted (clearance fit) in the fitting hole 320 , but the protrusion 924 may be tightly fitted in the fitting hole 320 .

The movement of the oil guide member 9 in the axial direction of the shaft 2 along the axial direction of the shaft 2 is restricted by the constituent members of the pressing device 6 . In the present embodiment, the yoke 63 of the pressing device 6 serves as the above-described structural member and restricts the movement of the oil guide member 9 in the direction of getting out of the oil guide member accommodating portion 32 . The yoke 63 is fixed to the cover member 3 with a bolt 302 so as to sandwich the second oil guiding portion 92 of the oil guiding member 9 housed in the oil guiding member housing portion 32 between the yoke 63 and the cover member 3 .

In the second oil guiding portion 92 of the oil guiding member 9, the distance between the inner side wall portion 922 and the front side wall portion 923 is narrowed toward the bottom plate 921 side, and the inner side wall portion 922 and the front side wall portion 923 are substantially V-shaped. ing. A notch 923 a is formed in a part of the upper end portion of the front side wall 923 of the second oil guiding portion 92 of the oil guiding member 9 on the first oil guiding portion 91 side. A part of the front side wall 923 closer to the bearing 8 than the notch 923a is a protrusion 925 that protrudes upward from the upper end face 923b of the front side wall 923 where the notch 923a is formed.

The projecting piece 925 is elastically deformable by being pressed by the yoke 63 , and the yoke 63 elastically deforms by pressing the projecting piece 925 toward the cover member 3 while being fixed to the cover member 3 . ing. More specifically, before the yoke 63 is attached to the cover member 3 , part of the projecting piece 925 protrudes forward from the mounting surface 3 a of the cover member 3 , and the yoke 63 is secured by the plurality of bolts 302 . By being fixed to the cover member 3, the projecting piece portion 925 is elastically deformed toward the inner side wall portion 922 side.

As shown in FIG. 7B , the lubricating oil L is introduced into the introduction portion 910 of the first oil introduction portion 91 from the oil introduction groove 70 formed in the transfer case 7 . In FIG. 7B, the flow of lubricating oil L is indicated by a plurality of arrows. The lubricating oil L flowing out from the lead-out portion 920 is supplied to the bearing space 80 through the inner surface 31 a of the bearing accommodating portion 31 . Lubricating oil L raked up by the rotation of clutch housing 5 is collected in oil guide groove 70 , and the collected lubricating oil L flows toward cover member 3 and down to introduction portion 910 .

(Actions and effects of the embodiment)
According to the embodiment described above, since the lubricating oil L raked up by the rotation of the clutch housing 5 is guided toward the bearing 8 by the oil guide member 9, the vehicle 1 travels while being inclined with respect to the horizontal direction. It is possible to supply the lubricating oil L to the bearing 8 also when Further, the first oil passage 900a is inclined downward in the vertical direction toward the second oil guide portion 92, and the second oil passage 900b is inclined downward in the vertical direction toward the lead-out portion 920. Therefore, the lubricating oil L smoothly flows from the introduction portion 910 to the outlet portion 920 by gravity without staying.

Further, in the present embodiment, since the movement of the oil guiding member 9 in the direction of getting out of the oil guiding member accommodating portion 32 is restricted by the yoke 63 of the pressing device 6, a dedicated component for restricting the movement of the oil guiding member 9 is provided. movement of the oil guiding member 9 can be restricted without requiring As a result, the number of parts and the number of assembling man-hours can be reduced compared to the case where the movement of the oil guide member 9 is restricted by a snap ring or the like, which contributes to cost reduction.

In addition, in the present embodiment, the yoke 63 sandwiches the second oil guide portion 92 of the oil guide member 9 between the inner end surface 32a of the cover member 3, so that the oil guide member 9 can be reliably prevented from slipping out. can. Furthermore, in the present embodiment, the front side wall 923 of the oil guiding member 9 is pressed by the yoke 63 while the projecting piece 925 is elastically deformed. Tatsuki is suppressed.

Further, in the present embodiment, since the plurality of projections 924 of the oil guide member 9 are fitted into the fitting holes 320, the position and posture of the oil guide member 9 in the oil guide member accommodating portion 32 can be stabilized. can.

(Appendix)
As described above, the present invention has been described based on the embodiments, but the embodiments do not limit the invention according to the scope of claims. Also, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

In addition, the present invention can be modified appropriately by omitting a part of the configuration, or by adding or replacing the configuration without departing from the gist of the invention. For example, in the above-described embodiment, the pressing device 6 includes the electromagnetic clutch mechanism 61, the electromagnetic coil 62, the yoke 63, and the cam mechanism 64. A hydraulic pressure device comprising a piston and cylinder may be used. In this case, the movement of the oil guide member 9 in the direction of getting out of the oil guide member accommodating portion 32 is restricted by the cylinder.

DESCRIPTION OF SYMBOLS 1... Vehicle 10... Driving force transmission device 103, 104... Rear wheel (auxiliary driving wheel) 11... Engine (driving source)
DESCRIPTION OF SYMBOLS 2... Shaft 3... Cover member 30... Insertion hole 302... Bolt 32... Oil guide member accommodating portion (accommodating portion) 320... Fitting hole 4... Clutch 5... Clutch housing 6... Pressing device 61... Electromagnetic clutch mechanism 62... Electromagnetic coil 63 ... Yoke (constituent member)
64 Cam mechanism 7 Transfer case (case member)
DESCRIPTION OF SYMBOLS 8... Bearing 9... Oil guide member 91... 1st oil guide part 910... Introduction part 92... 2nd oil guide part 920... Lead-out part 924... Projection 925... Projection part L... Lubricating oil

Claims (7)

a shaft that rotates by receiving the driving force of the driving source of the vehicle;
a cover member provided with an insertion hole through which the shaft is inserted;
a bearing disposed between the inner peripheral surface of the insertion hole and the outer peripheral surface of the shaft;
a clutch arranged on the outer periphery of the shaft;
a clutch housing that accommodates the clutch;
a pressing device that presses the clutch;
a case member that accommodates the clutch housing;
an oil guiding member that guides lubricating oil in the case member that has been raked up by the rotation of the clutch housing to the bearing;
The oil guide member is housed in a housing portion formed in the cover member,
movement of the oil guiding member in the axial direction of the shaft is regulated by a constituent member of the pressing device;
Driving power transmission device. The pressing device includes an electromagnetic clutch mechanism, an electromagnetic coil that generates an electromagnetic force for operating the electromagnetic clutch mechanism, a yoke that supports the electromagnetic coil, and a rotational force transmitted by the electromagnetic clutch mechanism that presses the clutch. and a cam mechanism that converts the pressing force to
the yoke, as a component of the pressing device, regulates the movement of the oil guiding member;
The driving force transmission device according to claim 1. The yoke is fixed to the cover member by bolts so as to sandwich the oil guide member between the yoke and the cover member.
The driving force transmission device according to claim 2. The oil guiding member has an elastically deformable projecting piece,
The yoke is elastically deformed by pressing the projecting piece against the cover member while being fixed to the cover member.
The driving force transmission device according to claim 2 or 3. The cover member is provided with a plurality of fitting holes recessed in a direction parallel to the rotation axis of the shaft,
The oil guiding member has a plurality of projections that fit into the plurality of fitting holes, respectively.
The driving force transmission device according to any one of claims 1 to 4. A vehicle having driving wheels to which the driving force of a driving source is transmitted via the driving force transmission device according to any one of claims 1 to 5,
The shaft is arranged to extend in the longitudinal direction of the vehicle,
The oil guiding member has a first oil guiding portion that extends in the longitudinal direction of the vehicle and has an introducing portion into which the lubricating oil is introduced, and a lead-out portion that leads out the lubricating oil toward the bearing. a second oil guiding portion extending in the width direction;
The first oil guiding portion is inclined so that the lubricating oil introduced into the introducing portion flows down to the second oil guiding portion side,
vehicle. The member constituting the pressing device sandwiches the second oil guiding portion between itself and the cover member.
A vehicle according to claim 6.

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