Lubrication device for a differential device

Abstract

To provide a lubrication device for a differential device, which can ensure lubricating performance of the differential device without increasing manufacturing cost.SOLUTION: When lubrication oil is discharged from a second discharge port 56 of a tube 48 toward a housing 40, the lubrication oil collides with a wall surface 40a of the housing 40 and flows along a rib 62 to be led to a portion requiring lubricate such as a bearing 38R. Further, even if the lubrication oil drops from the wall surface 40a, the dropped lubrication oil is received by a gutter portion 72, so that the lubrication oil flows through the gutter portion 72 toward the wall surface 40a. As a result, the lubrication oil can be supplied to the portion requiring lubrication through the wall surface 40a of the housing 40 without extending the tube 48 to the vicinity of the portion requiring lubrication, and therefore, lubricating performance of the differential device 10 can be ensured without increasing manufacturing cost.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a lubrication device for a differential device provided in a vehicle.

Background Art

[0002] In a differential device provided in a vehicle, a lubrication device for supplying lubricating oil to a differential mechanism housed in a differential case, bearings that rotatably support the differential case, etc. has been proposed. For example, Patent Document 1 discloses a structure in which a lubrication pipe for supplying lubricating oil to a differential mechanism and bearings is provided as a lubrication device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the configuration in which lubricating oil is supplied from the lubrication pipe described in Patent Document 1, in order to surely supply lubricating oil to the parts that require lubrication, it is necessary to extend the lubrication pipe to the vicinity of the parts that require lubrication. When extending the lubrication pipe to the vicinity of the parts that require lubrication, it is necessary to join a plurality of lubrication pipes and make the lubrication pipe branch into a plurality of paths, but there is a problem that the cost of manufacturing the lubrication pipe increases.

[0005] The present invention has been made against the background of the above circumstances, and an object thereof is to provide a lubrication device for a differential device that can ensure the lubrication performance of the differential device without increasing the manufacturing cost.

Means for Solving the Problems

[0006] The gist of the present invention is applied to a differential device including (a) a differential mechanism, a differential case housing the differential mechanism, and a housing rotatably supporting the differential case via bearings, and includes a lubricating pipe to which lubricating oil is supplied, and is a lubricating device for the differential device configured such that lubricating oil is discharged from a discharge port formed in the lubricating pipe, wherein (b) the discharge port of the lubricating pipe is formed at a position where lubricating oil is discharged toward the wall surface of the housing, (c) on the wall surface of the housing against which the lubricating oil discharged from the discharge port collides, ribs are formed for guiding the lubricating oil that has collided with the wall surface of the housing along the wall surface to a portion that requires lubrication, and (d) below the discharge port in a vehicle-mounted state, a member is disposed that receives the falling lubricating oil and has a gutter portion whose tip extends to the wall surface of the housing where the ribs are formed.

Advantages of the Invention

[0007] According to the present invention, when lubricating oil is discharged from the discharge port of the lubricating pipe toward the housing, the lubricating oil that has collided with the wall surface of the housing is guided along the ribs to a portion that requires lubrication. Further, even when the lubricating oil has fallen from the wall surface of the housing, the fallen lubricating oil is received by the gutter portion, so that the lubricating oil flows toward the wall surface of the housing via the gutter portion. Furthermore, for example, even when the lubricating oil discharged from the discharge port does not reach the wall surface of the housing due to the low temperature of the lubricating oil, the fallen lubricating oil is received by the gutter portion, so that the lubricating oil flows toward the wall surface of the housing via the gutter portion. As a result, without extending the lubricating pipe to near the portion that requires lubrication, the lubricating oil can be supplied to the portion that requires lubrication via the wall surface of the housing, so that the lubricating performance of the differential device can be ensured without increasing the manufacturing cost.

[0008] Also, preferably, in the present invention, the rib includes a pair of side ribs erected in a direction perpendicular to the wall surface of the housing from both sides of the wall surface of the housing against which the lubricating oil discharged from the discharge port collides. In this way, the lubricating oil that has collided with the wall surface of the housing is captured by the pair of side ribs, and the lubricating oil that has collided with the wall surface of the housing can be efficiently guided to the parts that require lubrication.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or deformed, and the dimensional ratios and shapes of each part are not necessarily accurately drawn.

Examples

[0011] FIG. 1 is a cross-sectional view of a differential device 10 to which the present invention is preferably applied. In FIG. 1, the lower half of the differential device 10 is omitted with respect to the rotation axis CL. The differential device 10 is a well-known differential gear device that transmits power while allowing a difference in the rotational speeds of a pair of left and right wheels.

[0012] The differential device 10 is arranged around the rotation axis CL. The differential device 10 includes a differential case 12 rotatably supported around the rotation axis CL, a pinion shaft 14 housed in the differential case 12 and fixed at both ends to the differential case 12, a pinion 16 rotatably fitted around the outer periphery of the pinion shaft 14, a pair of left and right side gears 18L and 18R meshing with the pinion 16, and a housing 40 which is a non-rotating member that rotatably supports the differential case 12 via a bearing (bearing 38R to be described later). A differential mechanism 20 is configured including the pinion shaft 14, the pinion 16, and the side gears 18L and 18R.

[0013] A space 22 for housing the differential mechanism 20 is formed inside the differential case 12. A pair of boss holes 24L and 24R into which a pair of left and right drive shafts 28L and 28R are fitted are formed on both sides of the rotation axis CL of the differential case 12. The space 22 for housing the differential mechanism 20 and the pair of boss holes 24L and 24R are spatially continuous with each other. A pair of through holes 26 through which the pinion shaft 14 is inserted are formed at both ends in a direction perpendicular to the rotation axis CL of the differential case 12. In FIG. 1, only one of the through holes 26 is shown. Further, a differential ring gear 32 is fixed to the outer peripheral side of the differential case 12 by bolts (not shown) or press-fitting.

[0014] The pinion shaft 14 is composed of a columnar member extending in the longitudinal direction. The pinion shaft 14 is fixed to the differential case 12 in a state where both ends in the longitudinal direction are inserted through the pair of through holes 26 so as not to fall off. The pinion shaft 14 is rotated around the rotation axis CL together with the differential case 12.

[0015] The pinion 16 is formed in an annular shape and the pinion shaft 14 passes through the inside. The pinion 16 is rotatably supported around the pinion shaft 14. Although omitted in FIG. 1, the pinions 16 are respectively provided at both ends of the pinion shaft 14.

[0016] The pair of left and right side gears 18L and 18R are each composed of a hollow annular member. A drive shaft 28L is spline-fitted to the inner peripheral portion of the side gear 18L, and a drive shaft 28R is spline-fitted to the inner peripheral portion of the side gear 18R. The pair of side gears 18L and 18R are rotatably arranged about the rotation axis CL. Also, the pair of side gears 18L and 18R are provided so as to correspond to each other with the pinion shaft 14 interposed therebetween. The pinion 16 and the side gears 18L and 18R constitute bevel gears whose rotation axes are perpendicular to each other.

[0017] One end of the differential case 12 in the direction of the rotation axis CL is rotatably supported by a housing 40 which is a non-rotating member via a bearing 38R. Also, although not shown, the other end of the differential case 12 in the direction of the rotation axis CL is also rotatably supported by a non-rotating member via a bearing 38L. The non-rotating member that holds the bearing 38L may be the housing 40 or a member different from the housing 40.

[0018] Next, a lubricating device 42 for supplying lubricating oil to lubrication-required parts (hereinafter referred to as lubrication-required parts) such as a differential mechanism 20 and a bearing 38R that constitute the differential device 10 will be described. The lubricating device 42 includes a tube 48 shown in FIG. 1, a rib 62 formed on the housing 40, and a groove portion 72 formed on a baffle plate 60 described later. The structures and functions of these tube 48, rib 62, and groove portion 72 will be described later.

[0019] When the housing 40 is viewed radially with respect to the rotation axis CL, at least a part thereof overlaps with the differential case 12. The housing 40 is formed with a lubricating oil supply oil passage 46 to which lubricating oil is supplied from a hydraulic control circuit (not shown). Further, the housing 40 is formed with a lubricating oil receiving oil passage 50 connected to a communication oil passage (not shown). The lubricating oil supply oil passage 46 and the lubricating oil receiving oil passage 50 are connected to each other via a tube 48. That is, one end of the tube 48 is connected to the lubricating oil supply oil passage 46, and the other end of the tube 48 is connected to the lubricating oil receiving oil passage 50. Note that the lubricating oil receiving oil passage 50 is connected to a communication oil passage (not shown), and is configured such that lubricating oil is supplied to a portion other than the differential device 10 through the communication oil passage.

[0020] The tube 48 is composed of, for example, a steel pipe for piping. Lubricating oil flows through the tube 48 when lubricating oil is supplied from the lubricating oil supply oil passage 46. The tube 48 extends in the direction of the rotation axis CL from one end connected to the lubricating oil supply oil passage 46, is bent in front of the differential ring gear 32, and extends vertically downward toward the differential case 12. Next, the tube 48 is bent in front of the baffle plate 60 and extends in the direction of the rotation axis CL toward the housing 40. Further, the tube 48 is bent in front of a rib 62 formed on the housing 40 and extends upward, and is bent toward the lubricating oil receiving oil passage 50 in the vicinity of the lubricating oil receiving oil passage 50, whereby the other end of the tube 48 is connected to the lubricating oil receiving oil passage 50. By bending the tube 48 as described above, as shown in FIG. 1, the tube 48 is piped so as to go around once in a substantially square shape above the differential case 12 vertically. The tube 48 is fixed by a clamp 52 or the like so that its position does not shift during traveling. Note that the tube 48 corresponds to the lubricating pipe of the present invention.

[0021] The tube 48 has a first discharge port 54, a second discharge port 56, and a third discharge port 58 formed on its path, and the lubricating oil discharged from the first discharge port 54 to the third discharge port 58 is supplied to the lubrication-required parts. The first discharge port 54 is formed at a position facing the differential case 12 directly above it in the vehicle-mounted state. Specifically, when the differential device 10 is viewed vertically from above in the vehicle-mounted state shown in FIG. 1, the first discharge port 54 is at or near a position overlapping the rotation axis CL, and is formed at or near the position where the pinion shaft 14 is arranged in the direction of the rotation axis CL.

[0022] The second discharge port 56 is formed at a position facing the wall surface 40a of the housing 40. That is, the second discharge port 56 is formed at a position where the lubricating oil is discharged toward the wall surface 40a of the housing 40. The third discharge port 58 is formed near the lubricating oil receiving oil passage 50. Note that the second discharge port 56 corresponds to the discharge port of the present invention.

[0023] The arrow formed on the tube 48 in FIG. 1 shows one mode of the flow of the lubricating oil supplied from the lubricating oil supply oil passage 46. As shown in FIG. 1, the lubricating oil flows in the tube 48 from the lubricating oil supply oil passage 46 toward the lubricating oil receiving oil passage 50 side. Further, the lubricating oil flowing in the tube 48 is discharged from the first discharge port 54 to the third discharge port 58, respectively.

[0024] The lubricating oil discharged from the first discharge port 54 is discharged vertically downward toward the differential case 12. A baffle plate 60, which will be described later, is provided between the first discharge port 54 and the differential case 12, and the lubricating oil discharged from the first discharge port 54 is supplied to the differential case 12 through the through hole 76 formed in the baffle plate 60. The lubricating oil that has reached the differential case 12 flows into the space 22 of the differential case 12 through, for example, the gap between the through hole 26 formed in the differential case 12 and the pinion shaft 14, and lubricates each gear of the differential mechanism 20.

[0025] The lubricating oil discharged from the second discharge port 56 is discharged toward the wall surface 40a of the housing 40. The lubricating oil adhering to the wall surface 40a of the housing 40 moves downward along the wall surface 40a of the housing 40 as indicated by the arrow, and lubricates the lubrication-required parts including the bearing 38R. Although a part of the lubricating part adhering to the wall surface 40a of the housing 40 falls from the wall surface 40a, the fallen lubricating oil is received by the trough part 72 of the baffle plate 60 described later, and is supplied to the lubrication-required parts via the trough part 72. By discharging the lubricating oil from the plurality of discharge ports (the first discharge port 54 to the third discharge port 58) formed in the tube 48, it becomes possible to supply the lubricating oil to a plurality of lubrication-required parts with one tube 48.

[0026] Next, the rib 62 formed on the housing 40 will be described. As described above, since the tube 48 is composed of a single tube, the tube 48 cannot be extended to the vicinity of each lubrication-required part of the differential device 10. On the other hand, the bearing 38R is configured such that the lubricating oil discharged from the second discharge port 56 toward the wall surface 40a of the housing 40 is supplied along the rib 62. Here, it is desired that the lubricating oil discharged toward the wall surface 40a of the housing 40 reaches the bearing 38R efficiently. Therefore, the rib 62 formed on the wall surface 40a of the housing 40 where the lubricating oil discharged from the second discharge port 56 collides is formed such that the lubricating oil colliding with the wall surface 40a is efficiently guided to the bearing 38R.

[0027] FIG. 2 is a perspective view of the rib 62 formed on the housing 40. Note that a part of the tube 48 through which the lubricating oil flows is shown above the paper surface of FIG. 2, and the arrow shown around the tube 48 indicates the flow of the lubricating oil discharged from the second discharge port 56 of the tube 48. As shown by the arrow in FIG. 2, due to variations in the position where the second discharge port 56 is formed for each product, the direction of discharge of the lubricating oil discharged from the second discharge port 56 also varies.

[0028] The rib 62 formed on the housing 40 is configured to retain the lubricating oil discharged from the second discharge port 56 within the rib 62 even when there is variation in the direction of the lubricating oil discharged from the second discharge port 56, and further to guide the lubricating oil along the rib 62 to the bearing 38R and the like. In FIG. 2, the rib 62 is formed by a pair of side ribs 62a and 62b formed so as to sandwich the tube 48, and a Y-shaped rib 62c formed in a Y shape.

[0029] The pair of side ribs 62a and 62b are respectively erected from the wall surface 40a of the housing 40 toward the second discharge port 56 side. Also, the pair of side ribs 62a and 62b extend longitudinally toward the side where the bearing 38R is disposed.

[0030] The pair of side ribs 62a and 62b are formed on both sides of the wall surface 40a of the housing 40 where the lubricating oil discharged from the second discharge port 56 collides. The pair of side ribs 62a and 62b are arranged at a predetermined interval when the housing 40 is viewed in the direction of the rotation axis CL. The interval formed between the pair of side ribs 62a and 62b is such that the lubricating oil discharged from the second discharge port 56 can be retained within the groove 66 formed by the pair of side ribs 62a and 62b, that is, within a range capable of capturing the lubricating oil discharged from the second discharge port 56 toward the wall surface 40a regardless of the variation in the products of the second discharge port 56. Also, the wall surface 40a of the housing 40 facing the second discharge port 56 and sandwiched by the pair of side ribs 62a and 62b is formed in a smooth curved surface shape so as to reduce the rebound of the lubricating oil discharged from the second discharge port 56.

[0031] The Y-shaped rib 62c is formed so as to be sandwiched between a pair of side ribs 62a and 62b. The Y-shaped rib 62c is formed of a pair of branch ribs 64a and 64b that bifurcate into two branches, and a center rib 64c connected to the branch ribs 64a and 64b. The pair of branch ribs 64a and 64b are respectively connected to the pair of side ribs 62a and 62b. The center rib 64c is formed in a protruding shape into which the lubricating oil guided by the pair of branch ribs 64a and 64b flows.

[0032] FIG. 3 is a perspective view of the rib 62 formed in the housing 40 of FIG. 2 as viewed from a direction different from that of FIG. 2. As shown in FIG. 3, the center rib 64c is continuously formed at a portion where the branch rib 64a and the branch rib 64b of the Y-shaped rib 62c are connected to each other. The center rib 64c protrudes downward in a protruding shape in the vehicle-mounted state. The center rib 64c has a predetermined dimension in the direction of the rotation axis CL along the wall surface 40a of the housing 40 as shown in FIG. 1.

[0033] By forming the rib 62 as described above, the lubricating oil discharged from the second discharge port 56 of the tube 48 is retained in the groove 66 formed by the pair of side ribs 62a and 62b, and the lubricating oil is suppressed from coming out of the groove 66. Further, the lubricating oil retained in the groove 66 is guided by the branch ribs 64a and 64b of the Y-shaped rib 62c and flows into the center rib 64c, and moves downward of the housing 40 along the protruding portion of the center rib 64c. In this way, the lubricating oil discharged from the second discharge port 56 toward the wall surface 40a of the housing 40 is appropriately captured by the rib 62. Further, as the lubricating oil moves downward along the rib 62, the bearing 38R disposed below the rib 62 is efficiently supplied with the lubricating oil.

[0034] Next, the baffle plate 60 provided between the differential case 12 and the housing 40 and the gutter portion 72 formed in the baffle plate 60 will be described. In the vehicle-mounted state shown in FIG. 1, a baffle plate 60 made of resin or the like is provided between the differential case 12 and the housing 40, vertically below the tube 48. FIG. 4 is a diagram for explaining the shape of the baffle plate 60. FIG. 4(a) corresponds to a perspective view of the baffle plate 60, and FIG. 4(b) corresponds to a view of the baffle plate 60 as seen from vertically above in the vehicle-mounted state shown in FIG. 1. Note that the baffle plate 60 corresponds to the member in which the gutter portion of the present invention is formed.

[0035] The baffle plate 60 includes a main body portion 70 formed in a cylindrical shape, a gutter portion 72 formed on the outer peripheral surface of the main body portion 70, and a flange portion 74 formed so as to avoid the portion where the gutter portion 72 is formed in the circumferential direction of the main body portion 70.

[0036] The main body portion 70 is formed in a cylindrical shape so as to cover the differential case 12 in the vehicle-mounted state shown in FIG. 1. The main body portion 70 is inclined in a direction in which the outer diameter becomes smaller toward the housing 40 side along the rotation axis CL in the vehicle-mounted state shown in FIG. 1.

[0037] The gutter portion 72 is arranged below the second discharge port 56 and at a position vertically below the center rib 64c extending along the rotation axis CL along the wall surface 40a in the vehicle-mounted state shown in FIG. 1 so as to receive the lubricating oil dropped from the second discharge port 56, the rib 62 (mainly the center rib 64c) of the housing 40, etc. The gutter portion 72 is formed by a pair of side ribs 72a, 72b erected radially outward from the outer peripheral surface of the main body portion 70. Further, in the vehicle-mounted state shown in FIG. 1, the tip of the gutter portion 72 extends in the direction of the rotation axis CL more than the main body portion 70 so that the tip is located near the wall surface 40a of the housing 40 where the rib 62 is formed on the rotation axis CL. Further, a through hole 76 is formed in a portion of the outer peripheral surface of the main body portion 70 sandwiched between the pair of side ribs 72a, 72b and located vertically below the first discharge port 54 in the vehicle-mounted state shown in FIG. 1.

[0038] Next, the flow of lubricating oil by the lubricating device 42 that lubricates the differential device 10 will be described. FIG. 5 is an enlarged view of a portion where the baffle plate 60 and the rib 62 of the housing 40 are formed in FIG. 1. The lubricating device 42 includes a tube 48, a rib 62 of the housing 40, and a trough portion 72 of the baffle plate 60 shown in FIG. 5. Each arrow shown in FIG. 5 indicates the flow of lubricating oil discharged from the first discharge port 54, the second discharge port 56, etc. of the tube 48.

[0039] In FIG. 5, the lubricating oil discharged from the first discharge port 54 of the tube 48 reaches the differential case 12 through the through hole 76 (see FIGS. 1 and 4) formed exclusively in the baffle plate 60 as indicated by the solid-line arrow. The lubricating oil that has reached the differential case 12 is supplied to the differential mechanism 20 housed in the differential case 12 through the gap between the through hole 26 of the differential case 12 and the pinion shaft 14.

[0040] Also, the lubricating oil discharged from the second discharge port 56 of the tube 48 collides with the wall surface 40a of the housing 40 as indicated by the arrow shown by the solid line in FIG. 5. At this time, even if there is a variation in the direction of the lubricating oil discharged from the second discharge port 56, the lubricating oil is captured by the pair of side ribs 62a, 62b constituting the rib 62. The lubricating oil that has collided with the wall surface 40a is collected by the center rib 64c formed in a protruding shape via the branch ribs 64a, 64b constituting the Y-shaped rib 62c. Further, the lubricating oil moves downward along the center rib 64c of the housing 40. The lubricating oil that has moved downward of the housing 40 is supplied to lubrication-required parts such as the bearing 38R (not shown in FIG. 5).

[0041] Of the lubricating oil that reaches the rib 62, a part thereof drops from the rib 62 (mainly the center rib 64c) as indicated by the arrow shown by the broken line. Even in this case, the lubricating oil that has dropped from the rib 62 is received by the gutter portion 72 formed in the baffle plate 60. As a result, the lubricating oil flows through the gutter portion 72 toward the wall surface 40a side of the housing 40, and the lubricating oil is supplied to the bearing 38R and the like along the wall surface 40a. Further, when the lubricating oil is at a low temperature (that is, when the lubricating oil has a high viscosity) or when the vehicle is tilted such as when traveling on an uphill lane, as indicated by the arrow shown by the dashed-dotted line in FIG. 5, the lubricating oil discharged from the second discharge port 56 may not reach the wall surface 40a, or the lubricating oil may drop from above the housing 40. Even in this case, the dropped lubricating oil is received by the gutter portion 72 of the baffle plate 60, so that the lubricating oil flows through the gutter portion 72 toward the wall surface 40a of the housing 40, and the lubricating oil is supplied to the bearing 38R and the like along the wall surface 40a.

[0042] As described above, according to the present embodiment, when the lubricating oil is discharged from the second discharge port 56 of the tube 48 toward the housing 40, the lubricating oil that has collided with the wall surface 40a of the housing 40 is guided to the lubrication-required parts such as the bearing 38R along the rib 62. Further, even when the lubricating oil drops from the wall surface 40a of the housing 40, the dropped lubricating oil is received by the gutter portion 72, so that the lubricating oil is caused to flow toward the wall surface 40a of the housing 40 via the gutter portion 72. Furthermore, for example, even when the lubricating oil discharged from the second discharge port 56 does not reach the wall surface 40a of the housing 40 due to the low temperature of the lubricating oil, the dropped lubricating oil is received by the gutter portion 72, so that the lubricating oil is caused to flow toward the wall surface 40a of the housing 40 via the gutter portion 72. As a result, without extending the tube 48 to the vicinity of the lubrication-required part, the lubricating oil can be supplied to the lubrication-required part via the wall surface 40a of the housing 40, so that the lubrication performance of the differential device 10 can be ensured without increasing the manufacturing cost.

[0043] As described above, the embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is also applicable to other aspects.

[0044] For example, in the foregoing embodiment, the other end of the tube 48 was connected to the lubricating oil receiving oil passage 50, but it is not necessarily limited to this mode, and the connection destination of the other end of the tube 48 may be changed as appropriate.

[0045] Also, in the foregoing embodiment, the lubricating oil discharged from the second discharge port 56 was configured to lubricate the bearing 38R along the rib 62, but the lubrication required part to which the lubricating oil is supplied is not limited to the bearing, and for example, it can be appropriately applied to parts such as gears that require lubrication.

[0046] Note that what has been described above is merely one embodiment, and the present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art.

Explanation of Reference Numerals

[0047] 10: Differential device 12: Differential case 20: Differential mechanism 38R: Bearing (part that requires lubrication) 40: Housing 40a: Wall surface (wall surface of the housing) 42: Lubricating device 48: Tube (lubrication pipe) 56: Second discharge port (discharge port) 60: Baffle plate (member formed with a trough portion) 62: Rib 72: Trough portion

Claims

【Claim 1】 A lubrication device for a differential device, which is applied to a differential device including a differential mechanism, a differential case that houses the differential mechanism, and a housing that rotatably supports the differential case via bearings, and includes a lubrication pipe to which lubricating oil is supplied, and is configured such that the lubricating oil is discharged from a discharge port formed in the lubrication pipe, the discharge port of the lubrication pipe is formed at a position where the lubricating oil is discharged toward the wall surface of the housing, on the wall surface of the housing against which the lubricating oil discharged from the discharge port collides, ribs are formed for guiding the lubricating oil that has collided with the wall surface of the housing along the wall surface to a portion that requires lubrication, below the discharge port in the vehicle-mounted state, a member is disposed that receives the falling lubricating oil and has a gutter portion whose tip extends to the wall surface of the housing where the ribs are formed, A lubrication device for a differential device, characterized by the above.

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