Power transmission

Abstract

To provide a power transmission device which can capture a larger amount of a lubrication oil with an oil gutter to supply the larger amount of the lubrication oil to a lubrication oil supplied part and improve lubrication performance of the lubrication oil supplied part.SOLUTION: A bottom plate 42 of an oil gutter 41 of a transmission 1 is provided with a lubrication oil introduction hole 48 which introduces a lubrication oil scraped by a reverse idler gear 9A into an oil passage 47. A left case 4 has: a bottom wall 4A; a vertical wall part 4C which extends upward from the bottom wall 4A and is arranged side by side with the reverse idler gear 9A in an axial direction of a reverse shaft 9; and an arc shaped wall part 4r which extends upward from the bottom wall 4A of the left case 4 while curving along an outer peripheral shape of the reverse idler gear 9A and faces the reverse idler gear 9A in a radial direction of the reverse idler gear 9A. An upper end part 4n of the arc shaped wall part 4r is located above an axis 9a of the reverse shaft 9.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a power transmission device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a power transmission device, such as a transmission mounted on a vehicle, in which lubricating oil is scooped up by a transmission gear to lubricate points (see Patent Document 1).

[0003] The transmission described in Patent Document 1 has a first large diameter gear and a second large diameter gear that scoop up the lubricating oil stored at the bottom of the transmission case, and a first receiver and a second receiver that collect the lubricating oil scooped up by the first large diameter gear and the second large diameter gear, respectively.

[0004] The first receiver and the second receiver are disposed to extend in the axial direction of the shaft body, and supply the collected lubricating oil to the points to be lubricated. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-7210 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in conventional transmissions, the lubricating oil scooped up by the first large diameter gear and the second large diameter gear is simply collected by the first receiver and the second receiver, so there is a risk that not much lubricating oil will be collected by the first large diameter gear and the second large diameter gear.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a power transmission device that can capture more lubricating oil in an oil gutter and supply more lubricating oil to the parts supplied with lubricating oil, thereby improving the lubrication performance of the parts supplied with lubricating oil. [Means for solving the problem]

[0008] The present invention relates to a lubricating oil supply system, comprising: a case member having a bottom portion in which lubricating oil is stored; a rotating shaft having a gear member for scooping up the lubricating oil stored in the bottom portion of the case member and rotatably supported by the case member; and an oil gutter that passes directly above the gear member and extends in the axial direction of the rotating shaft, captures the lubricating oil scooped up by the gear member and supplies it to a lubricating oil supply target portion, the oil gutter having an oil passage formed by a bottom plate and a side wall protruding upward from the bottom plate, and a bottom plate extending in the vertical direction so as to be located directly above the gear member, the gear member being disposed in a direction parallel to the gear member. a lubricating oil introduction hole that introduces lubricating oil scooped up by a member into the oil passage, and a lubricating oil supplying section that supplies the lubricating oil flowing through the oil passage to the lubricating oil supplied section, wherein the case member has a bottom wall, a vertical wall section that extends upward from the bottom wall and is aligned with the gear member in the axial direction of the rotating shaft, and an arc-shaped wall section that extends upward from the bottom wall of the case member while curving along the outer circumferential shape of the gear member and faces the gear member in the radial direction of the gear member, and an upper end of the arc-shaped wall section is located above the axis of the rotating shaft, a protruding wall is provided on a lower portion of the bottom plate, the protruding wall protruding from an edge of the lubricating oil introduction hole located at one end of the rotating shaft in the axial direction toward the vertical wall portion, the vertical wall portion having a support portion for rotatably supporting the end of the rotating shaft, and a lubricating oil passage having an opening portion that opens toward the protruding wall and supplies the lubricating oil introduced from the opening portion to the end of the rotating shaft, It is characterized by the fact that Effect of the Invention

[0009] According to the present invention described above, a larger amount of lubricating oil can be captured by the oil gutter and a larger amount of lubricating oil can be supplied to the lubricating oil supplied parts, thereby improving the lubricating performance of the lubricating oil supplied parts. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view of a power transmission device according to one embodiment of the present invention, showing only the essential parts of the transmission through a transmission case. [Diagram 2] FIG. 2 is a view of the left case seen from the right side in a state where the right case of the power transmission device according to the embodiment of the present invention is removed. [Diagram 3] FIG. 3 is a view taken along the line III-III in FIG. [Figure 4] FIG. 4 is a view of the periphery of a reverse idler shaft of a power transmission device according to one embodiment of the present invention, viewed from diagonally forward and left. [Diagram 5] 5 is a cross-sectional view of the left case of FIG. 2 cut in the VV direction of FIG. [Figure 6] 6 is a cross-sectional view of the left case of FIG. 2 taken along the line VI-VI of FIG. [Figure 7] FIG. 7 is a plan view of an input shaft, a reverse shaft, and an oil gutter of a power transmission device according to one embodiment of the present invention. [Figure 8] FIG. 8 is a front view of an oil gutter for a power transmission device according to one embodiment of the present invention. [Figure 9] FIG. 9 is a front view of the periphery of a lubricant oil introduction hole of an oil gutter of a power transmission device according to one embodiment of the present invention, viewed obliquely from above. [Figure 10] FIG. 10 is a bottom view of the periphery of the lubricant oil introduction hole of the oil gutter of the power transmission device according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A power transmission device according to one embodiment of the present invention includes a case member having a bottom portion in which lubricating oil is stored, a gear member that scoops up the lubricating oil stored in the bottom portion of the case member, and a rotating shaft that is rotatably supported by the case member; and an oil gutter passing directly above the gear member and extending in the axial direction of the rotating shaft, capturing lubricating oil scooped up by the gear member and supplying it to a lubricating oil-supplied portion, the oil gutter having an oil passage formed by a bottom plate and a side wall protruding upward from the bottom plate, a lubricating oil inlet hole penetrating the bottom plate in the vertical direction so as to be located directly above the gear member, for introducing the lubricating oil scooped up by the gear member into the oil passage, and a lubricating oil supply portion supplying the lubricating oil flowing in the oil passage to the lubricating oil-supplied portion, the case member having a bottom wall, a vertical wall portion extending upward from the bottom wall and aligned with the gear member in the axial direction of the rotating shaft, and an arc-shaped wall portion extending upward from the bottom wall of the case member while curving along the outer circumferential shape of the gear member and facing the gear member in the radial direction of the gear member, and an upper end of the arc-shaped wall portion is located above the axis of the rotating shaft.

[0012] As a result, the power transmission device according to one embodiment of the present invention can capture more lubricating oil in the oil gutter and supply more lubricating oil to the parts supplied with lubricating oil, thereby improving the lubricating performance of the parts supplied with lubricating oil. EXAMPLES

[0013] Hereinafter, a power transmission device according to an embodiment of the present invention will be described with reference to the drawings. Figures 1 to 10 are diagrams showing a power transmission device according to an embodiment of the present invention. In Figures 1 to 10, the up, down, front, rear, left and right directions are based on the power transmission device installed in a vehicle, the front and rear direction of the vehicle is the front-rear direction, the left and right direction of the vehicle (vehicle width direction) is the left and right direction, and the up and down direction of the vehicle (vehicle height direction) is the up and down direction.

[0014] First, the configuration will be described. 1, a vehicle is provided with a transmission 1, and an engine 2 is connected to the transmission 1. The transmission 1 and the engine 2 are provided in an engine room (not shown) of the vehicle.

[0015] The transmission 1 includes a transmission case 3, which has a left case 4 and a right case 5. The transmission 1 of this embodiment constitutes a power transmission device, and the transmission case 3 constitutes a case member.

[0016] A transmission mechanism 6 is installed in the left case 4. The transmission mechanism 6 has an input shaft 7 extending in the vehicle width direction, and the power of the engine 2 is transmitted to the input shaft 7.

[0017] The transmission mechanism 6 has a counter shaft 8 and a reverse shaft 9 extending parallel to an input shaft 7. The input shaft 7 is provided with a first-speed input gear 7A, a reverse input gear 7R, a second-speed input gear 7B, a third-speed input gear 7C, a fourth-speed input gear 7D, a fifth-speed input gear 7E, and a sixth-speed input gear 7F.

[0018] The first speed input gear 7A, the reverse input gear 7R and the second speed input gear 7B are fixed to the input shaft 7 and rotate integrally therewith, while the input gears 7C, 7D, 7E and 7F are freely rotatable relative to the input shaft 7.

[0019] The counter shaft 8 is provided with a first-speed counter gear 8A, a second-speed counter gear 8B, a third-speed counter gear 8C, a fourth-speed counter gear 8D, a fifth-speed counter gear 8E, a sixth-speed counter gear 8F, a reverse counter gear 8R, and a final drive gear 8G.

[0020] The reverse counter gear 8R, the final drive gear 8G, and the third-speed counter gear 8C to sixth-speed counter gear 8F are fixed to the counter shaft 8 and rotate integrally with the counter shaft 8, while the first-speed counter gear 8A and the second-speed counter gear 8B are freely rotatable relative to the counter shaft 8.

[0021] The counter gears 8A to 8F mesh with the input gears 7A to 7F, and the final drive gear 8G meshes with a final driven gear 12 of the differential device 10.

[0022] Reverse idler gears 9A and 9B are provided on the reverse shaft 9. The reverse idler gear 9A is fixed to the reverse shaft 9 and rotates integrally therewith, while the reverse idler gear 9B is rotatable relative to the reverse shaft 9.

[0023] The reverse idler gear 9A meshes with the reverse input gear 7R, and the reverse idler gear 9B meshes with the reverse counter gear 8R.

[0024] The input shaft 7, the counter shaft 8 and the reverse shaft 9 are provided with synchronizers 31A, 31B, 31C and 31D, respectively, and the synchronizers 31A, 31B, 31C and 31D are movable in the axial direction of the shafts 7, 8 and 9, respectively.

[0025] The synchronizer 31A is disposed between the third-speed input gear 7C and the fourth-speed input gear 7D. The synchronizer 31A has an inner peripheral spline (not shown) and a sleeve 31a provided so as to be movable in the axial direction of the input shaft 7, and a hub (not shown) located inside the sleeve 31a and provided so as to be rotatable integrally with the input shaft 7, the hub having an outer peripheral spline that fits with the inner peripheral spline of the sleeve 31a.

[0026] The third-speed input gear 7C is provided with a dog 7c having an outer circumferential spline formed thereon, and the dog 7c rotates integrally with the third-speed input gear 7C. The fourth-speed input gear 7D is provided with a dog 7d having an outer circumferential spline formed thereon, and the dog 7d rotates integrally with the fourth-speed input gear 7D.

[0027] A third- to fourth-speed shift fork 34A (see FIG. 2) of the shift mechanism is fitted into the sleeve 31a. When the sleeve 31a is moved toward the third-speed input gear 7C by the third- to fourth-speed shift fork 34A, the inner peripheral spline of the sleeve 31a fits into the outer peripheral spline of the dog 7c.

[0028] As a result, the third-speed input gear 7C is connected to the input shaft 7 via the sleeve 31a, and the rotation of the input shaft 7 is transmitted from the third-speed input gear 7C to the counter shaft 8 via the third-speed counter gear 8C.

[0029] At this time, the power of the engine 2 is transmitted from the input shaft 7, the third-speed input gear 7C, and the third-speed counter gear 8C to the counter shaft 8, and then from the final drive gear 8G to the final driven gear 12.

[0030] The power of the engine 2 transmitted to the differential device 10 is then transmitted to left and right front wheels (not shown) via left and right drive shafts (not shown).

[0031] It should be noted that the synchronization devices 31B, 31C, and 31D have the same configuration and function as the synchronization device 31A, and detailed description thereof will be omitted.

[0032] As shown in FIG. 2, shift forks 34B and 34C are fitted into the sleeves of synchronizers 31C and 31D, and a shift fork (not shown) is fitted into the sleeve of synchronizer 31B.

[0033] These shift forks 34A, 34B, 34C and a shift fork not shown are operated by a shift and select shaft not shown via shift yokes corresponding to the shift forks 34A, 34B, 34C and a shift fork not shown in a group 34Y of multiple shift yokes.

[0034] 1, the differential device 10 is housed in a bulging wall portion 5A provided in the right case 5 and the left case 4. The bulging wall portion 5A bulges out from a partition wall 5W of the right case 5 to the right.

[0035] That is, the partition wall 5W of the right case 5 is located closer to the left case 4 than the tip of the protruding wall portion 5A in the protruding direction. The interior of the left case 4 and the interior of the right case 5 are separated by the partition wall 5W.

[0036] 1 and 2, the left case 4 has a bottom wall 4A, a front wall 4F extending upward from the front end of the bottom wall 4A, a rear wall 4R, and a left side wall 4L extending upward from the left end of the bottom wall 4A and connecting the left end of the front wall 4F and the left end of the rear wall 4R.

[0037] The left case 4 has a vertical wall 4W that protrudes upward from the right end of the bottom wall 4A and is connected to the right end of the rear wall 4R, and an upper wall 4B that connects the upper ends of the front wall 4F, the upper ends of the rear wall 4R, and the upper ends of the left side wall 4L.

[0038] The rear wall 4R extends leftward from the front end of the vertical wall 4W above the center in the height direction of the vertical wall 4W. As shown in Fig. 1, the left case 4 has a transmission chamber 4M surrounded by a bottom wall 4A, an upper wall 4B, a front wall 4F, and a rear wall 4R.

[0039] The transmission mechanism 6 is housed in the transmission chamber 4M. That is, the transmission chamber 4M is a space surrounded by a bottom wall 4A, an upper wall 4B, a front wall 4F, and a rear wall 4R that are formed on the rear side (left side) of the vertical wall 4W.

[0040] The differential device 10 has a differential case 11 and a final driven gear 12 that is attached to the outer periphery of the differential case 11 and rotates integrally with the differential case 11.

[0041] A differential gear mechanism (not shown) is housed inside the differential case 11. One ends of left and right drive shafts (not shown) are connected to the differential gear mechanism. The other ends of the left and right drive shafts are connected to left and right front wheels (not shown), respectively, and the front wheels rotate integrally with the drive shafts. The vehicle in this embodiment is a FF (front engine, front drive) vehicle.

[0042] In the transmission 1, the speed change mechanism 6 changes the power (rotation speed) of the engine 2, and transmits the power from the differential gear mechanism to the left and right drive shafts and the front wheels so as to be able to rotate differentially.

[0043] 1 and 2, a bearing support portion 4a is formed on a vertical wall 4W of the left case 4. The left end portion of the differential case 11 is rotatably supported by the bearing support portion 4a via a bearing 17A.

[0044] 1, a bearing support portion 5a is formed on the bulging wall portion 5A of the light case 5. The right end portion of the differential case 11 is rotatably supported by the bearing support portion 5a of the bulging wall portion 5A via a bearing 17B.

[0045] Lubricating oil O is stored in the bottom of the left case 4 and the right case 5, i.e., the bottom of the transmission case 3, and when the engine 2 is stopped, the oil level of the lubricating oil O is located between the lower and upper ends of the bearing support portion 4a and below the bearing 17G (see Figures 2 and 5).

[0046] 2, a catch tank 19 is installed on the upper part of the left case 4 and the right case 5. The catch tank 19 is installed horizontally away from the final driven gear 12 with respect to the central axis C of rotation of the final driven gear 12 and above the central axis C of rotation of the final driven gear 12.

[0047] The lubricating oil scooped up by the final driven gear 12 is introduced into a catch tank 19 and temporarily stored therein.

[0048] As shown in FIG. 1, a bearing 17C is provided at the left end of the input shaft 7, and the input shaft 7 is rotatably supported by a bearing support portion of the left side wall 4L of the left case 4 via the bearing 17C.

[0049] A bearing 17D is provided at the right end of the input shaft 7, and the input shaft 7 is rotatably supported by a bearing support portion of the partition wall 5W of the light case 5 via the bearing 17D.

[0050] A bearing 17E is provided at the left end of the counter shaft 8, and the counter shaft 8 is rotatably supported by a bearing support portion 4b of the left side wall 4L of the left case 4 via the bearing 17E.

[0051] A bearing 17F is provided on the right end of the counter shaft 8, and the counter shaft 8 is rotatably supported by a bearing support portion 5b of the partition wall 5W of the light case 5 via the bearing 17F.

[0052] The axial length of the reverse shaft 9 is shorter than the axial lengths of the input shaft 7 and the counter shaft 8 , and the left end of the reverse shaft 9 does not reach the left side wall 7L of the left case 4 .

[0053] 1 and 2, the front wall 4F of the left case 4 has a vertical wall portion 4C. The vertical wall portion 4C extends upward from the bottom wall 4A and also extends rearward from the lower side of the front wall 4F, and is located on the left side wall 4L side with respect to the reverse idler gear 9A.

[0054] That is, a part of the lower portion of the front wall 4F of the left case 4 has a vertical wall portion 4C recessed rearward from the front wall 4F.

[0055] As shown in FIG. 1, the vertical wall portion 4C is aligned with the reverse idler gear 9A in the axial direction of the reverse shaft 9, and the gap between the left side wall 4L and the reverse idler gear 9A in the axial direction of the reverse shaft 9 is smaller than the tooth width of the reverse idler gear 9A (the plate thickness in the axial direction of the reverse shaft 9).

[0056] 5, the front wall 4F is provided with an arc-shaped wall portion 4r. The arc-shaped wall portion 4r extends upward from the bottom wall 4A of the left case 4 while curving along the outer circumferential shape of the reverse idler gear 9A, and faces the reverse idler gear 9A in the radial direction of the reverse idler gear 9A (the direction perpendicular to the axis 9a of the reverse shaft 9).

[0057] The upper end 4n of the arc-shaped wall portion 4r is located above the axis 9a of the reverse shaft 9 and below the upper end 4m of the vertical wall portion 4C. That is, the arc-shaped wall portion 4r is curved from the bottom wall 4A to the upper end 4n along the outer circumferential shape of the reverse idler gear 9A. The outer circumferential shape of the reverse idler gear 9A is a circle.

[0058] A bearing support portion 4c is provided on the vertical wall portion 4C (see FIG. 1), and the left end portion (end portion) of the reverse shaft 9 is rotatably supported by the bearing support portion 4c via a bearing 17G.

[0059] A bearing 17H is provided at the right end of the reverse shaft 9, and the reverse shaft 9 is rotatably supported by a bearing support portion 5c of the partition wall 5W of the light case 5 via the bearing 17H.

[0060] An oil gutter 41 is provided in the left case 4. As shown in Fig. 5, the oil gutter 41 is installed above the reverse idler gear 9A and the upper end 4m of the vertical wall portion 4C.

[0061] 3 and 7, the right end of the oil gutter 41 is located directly above the reverse idler gear 9B, and extends from its right end to a position directly above the reverse idler gear 9A (see FIG. 7) in the direction of the axis 9a of the reverse shaft 9. Hereinafter, the direction of the axis 9a of the reverse shaft 9 will also be referred to as the axial direction of the reverse shaft 9.

[0062] The left end of the oil gutter 41 extends to the left end 7f of the input shaft 7 and is located above the bearing 17C. In this embodiment, the reverse shaft 9 constitutes a rotating shaft, and the reverse idler gear 9A constitutes a gear member. The reverse idler gear 9A is immersed in lubricating oil O.

[0063] The reverse idler gear 9A of this embodiment rotates counterclockwise R when viewed from the right in Figure 5 when the vehicle is traveling forward, scooping up the lubricating oil O stored in the bottom of the left case 4 and supplying it to the oil gutter 41 along the arc-shaped wall portion 4r.

[0064] The gap between the reverse idler gear 9A and the arcuate wall portion 4r in the radial direction of the reverse idler gear 9A is about twice the tooth thickness a of the reverse idler gear 9A, and the radial outer end of the reverse idler gear 9A is close to the arcuate wall portion 4r.

[0065] The gap between the reverse idler gear 9A and the arcuate wall portion 4r in the radial direction of the reverse idler gear 9A is formed to have a width that allows the lubricating oil scooped up by the reverse idler gear 9A to be smoothly scooped up along the arcuate wall portion 4r.

[0066] The lubricating oil supplied to the oil gutter 41 is guided leftward by the oil gutter 41 and supplied to the bearing 17C.

[0067] A guide member (not shown) for guiding lubricating oil to the left end 7f of the input shaft 7 is provided between the bearing 17C and the left side wall 4L.

[0068] A lubricating oil passage (not shown) is formed inside the input shaft 7. The lubricating oil passage extends along the axial direction of the input shaft 7, and the left end of the lubricating oil passage is open.

[0069] The lubricating oil supplied from the oil gutter 41 to the bearing 17C lubricates the bearing 17C, and then is guided between the bearing 17C and the left side wall 4L to the guide member.

[0070] A drain hole (not shown) is formed in the input shaft 7, and the drain hole discharges the lubricating oil flowing through the lubricating oil passage radially outward of the input shaft 7 by centrifugal force caused by the rotation of the input shaft 7.

[0071] The lubricating oil discharged from the discharge hole radially outward from the input shaft 7 lubricates the input gears 7C, 7D, 7E, and 7F and the synchronizers 31A and 31B which rotate relative to the input shaft 7. In this embodiment, the input gears 7C, 7D, 7E, and 7F, the bearing 17C, and the synchronizers 31A and 31B constitute the lubricating oil supplied parts.

[0072] In this manner, the oil gutter 41 of this embodiment captures the lubricating oil scooped up by the reverse idler gear 9A and supplies it to the left end 7f of the input shaft 7.

[0073] As shown in FIGS. 7 and 8, the oil gutter 41 includes a bottom plate 42, a front wall 43, a rear wall 44, a left side wall 45, and a right side wall 46.

[0074] As shown in FIG. 7, the bottom plate 42 extends leftward along the axial direction of the reverse shaft 9 from directly above the reverse idler gear 9B, and the left side is curved rearward.

[0075] The front wall 43 extends upward from the front end and left end of the bottom plate 42, and extends in the same direction as the bottom plate 42 extends.

[0076] The rear wall 44 extends upward from the rear end of the bottom plate 42 and faces the front wall 43 in the front-rear and left-right directions.

[0077] The left side wall 45 extends upward from the left end of the bottom plate 42 and connects the left side portion of the front wall 43 and the left end of the rear wall 44 .

[0078] The right side wall 46 extends upward from the right end of the bottom plate 42 and connects the right end of the front wall 43 and the right end of the rear wall 44 .

[0079] In the oil gutter 41, an oil passage 47 through which the lubricating oil flows is formed by a bottom plate 42, a front wall 43, a rear wall 44, a left side wall 45, and a right side wall 46. A lubricating oil supply hole 42a is formed in the left end portion of the bottom plate 42. In this embodiment, the front wall 43, the rear wall 44, the left side wall 45, and the right side wall 46 constitute side walls.

[0080] The lubricant oil supply hole 42a penetrates in the vertical direction, and supplies (discharges) the lubricant oil flowing through the oil passage 47 to the bearing 17C. The lubricant oil supply hole 42a in this embodiment constitutes a lubricant oil supply portion.

[0081] As shown in Figure 7, the oil gutter 41 has a first oil gutter portion 41A extending linearly in the axial direction of the reverse shaft 9, a curved portion 41B curving from the first oil gutter portion 41A toward the left end portion 7f of the input shaft 7, and a second oil gutter portion 41C extending from the curved portion 41B toward the left end portion 7f (bearing 17C) of the input shaft 7.

[0082] The curved portion 41B is formed by curving the bottom plate 42, the front wall 43, and the rear wall 44.

[0083] In other words, the oil gutter 41 has a first oil gutter portion 41A in which the bottom plate 42, front wall 43 and rear wall 44 extend linearly in the axial direction of the reverse shaft 9, a curved portion 41B in which the bottom plate 42, front wall 43 and rear wall 44 are curved from the first oil gutter portion 41A toward the left end portion 7f of the input shaft 7, and a second oil gutter portion 41C in which the bottom plate 42, front wall 43 and rear wall 44 extend from the curved portion 41B toward the left end portion 7f of the input shaft 7.

[0084] In the oil gutter 41, the width W1 of the oil passage 47 defined by the curved portion 41B is formed larger than the width W2 of the oil passage 47 defined by the first oil gutter portion 41A in front of (on the right side of) the curved portion 41B.

[0085] A lubricating oil introduction hole 48 is provided in the bottom plate 42 of the oil gutter 41. The lubricating oil introduction hole 48 penetrates the bottom plate 42 in the vertical direction so as to be located directly above the reverse idler gear 9A, and introduces the lubricating oil scooped up by the reverse idler gear 9A into the oil passage 47.

[0086] That is, a portion of the lubricating oil scooped up by the reverse idler gear 9A is introduced into the oil passage 47 through the lubricating oil introduction hole 48, and the remaining lubricating oil passes over the front side wall 43 from the front and is introduced into the oil passage 47.

[0087] The lubricating oil introduction hole 48 is located on the axis 9a side of the reverse shaft 9, and has a rear edge portion 48a extending in the axial direction of the reverse shaft 9, and a front edge portion 48b located on the opposite side of the axis 9a of the reverse shaft 9, facing the rear edge portion 48a in the front-to-rear direction, and extending in the axial direction of the reverse shaft 9.

[0088] The lubricant oil introduction hole 48 has a left edge 48c located at the left end of the reverse shaft 9 in the axial direction, and a right edge 48d located at the right end of the reverse shaft 9 in the axial direction.

[0089] The lubricant introduction hole 48 extends in the axial direction of the reverse shaft 9 so as to approach the axis 9a of the reverse shaft 9 toward the lubricant supply hole 42a when viewed from above the oil gutter 41.

[0090] That is, when viewed from above the oil gutter 41, the lubricant oil introduction hole 48 extends in the axial direction of the reverse shaft 9 so as to approach the axis 9a of the reverse shaft 9 from the right edge 48d toward the left edge 48c in the axial direction of the reverse shaft 9.

[0091] The rear edge 48a of this embodiment constitutes the edge of the lubricant introduction hole on the axial side of the rotating shaft, and the front edge 48b, the left edge 48c, and the right edge 48d constitute the edges of the lubricant introduction hole. The left edge 48c constitutes one end of the lubricant introduction hole in the axial direction of the rotating shaft, and the right edge 48d of this embodiment constitutes the other end of the lubricant introduction hole in the axial direction of the rotating shaft.

[0092] As shown in Fig. 3, the left edge 48c of the lubricant introduction hole 48 is aligned with the vertical wall portion 4C in the up-down direction. As shown in Fig. 7, the lubricant introduction hole 48 extends in the axial direction of the reverse shaft 9 so as to move away from the axis 9a of the reverse shaft 9 from the left edge 48c toward the right edge 48d.

[0093] That is, the lubricant oil introduction hole 48 extends in the axial direction of the reverse shaft 9 so as to approach the arc-shaped wall portion 4r as it moves away from the vertical wall portion 4C in the axial direction of the reverse shaft 9.

[0094] Here, extending in the axial direction of the reverse shaft 9 means extending along the direction of the axis 9a of the reverse shaft 9, rather than extending parallel to the axis 9a of the reverse shaft 9, and extending along the axis 9a of the reverse shaft 9 means extending parallel to the axis 9a of the reverse shaft 9.

[0095] The length of the lubricant introduction hole 48 in the axial direction of the reverse shaft 9 is formed to be approximately twice the tooth width of the reverse idler gear 9A. The length of the lubricant introduction hole 48 in the axial direction of the reverse shaft 9 may be any length that is equal to or greater than the tooth width of the reverse idler gear 9A.

[0096] 7 and 9, in the first oil gutter portion 41A, a rear side wall 49 is provided on the bottom plate 42. The rear side wall 49 protrudes upward from a rear edge portion 48a of the lubricant oil introduction hole 48 on the axis 9a side of the reverse shaft 9, and extends in the axial direction of the reverse shaft 9 along the rear edge portion 48a. The rear side wall 49 in this embodiment forms a wall portion.

[0097] 7, the rear side wall 49 has a first rear side wall 49A and a second rear side wall 49B. The first rear side wall 49A extends linearly together with the rear edge portion 48a of the lubricant oil introduction hole 48 from a right end portion 49a toward a left end portion 49b on the lubricant oil supply hole 42a side in the axial direction of the reverse shaft 9 so as to approach the axis 9a of the reverse shaft 9.

[0098] The second rear side wall 49B extends linearly from the left end portion 49b of the first rear side wall 49A in the axial direction of the reverse shaft 9 toward the lubricant supply hole 42a together with the rear edge portion 48a of the lubricant introduction hole 48.

[0099] The second rear wall 49B is bent toward the front wall 43 with respect to the first rear wall 49A at the left end portion 49b of the first rear wall 49A.

[0100] The inclination of the first rear side wall 49A relative to the axis 9a of the reverse shaft 9 is greater than the inclination of the second rear side wall 49B relative to the axis 9a of the reverse shaft 9.

[0101] In this embodiment, the second rear side wall 49B extends parallel to the axis 9a of the reverse shaft 9, and the first rear side wall 49A is inclined with respect to the axis 9a of the reverse shaft 9.

[0102] In this embodiment, the first rear wall 49A constitutes the first wall portion, and the second rear wall 49B constitutes the second wall portion. The right end 49a of the first rear wall 49A constitutes one end of the first wall portion in the axial direction of the rotation shaft, and the left end 49b of the first rear wall 49A constitutes the other end of the first wall portion on the lubricant supply portion side.

[0103] As shown in FIGS. 7 and 9, in the first oil gutter portion 41A, the bottom plate 42 is provided with a front wall 50, a left side wall 51, a right side wall 52, and an inclined wall 53.

[0104] The front side wall 50 protrudes upward from a front edge portion 48b of the lubricant introduction hole 48 on the opposite side of the axis 9a of the reverse shaft 9 with respect to the rear side wall 49, and extends in the axial direction of the reverse shaft 9 along the front edge portion 48b.

[0105] 9, the rear wall 49 and the front wall 50 have high portions 49m, 50m and low portions 49n, 50n that are lower in height than the high portions 49m, 50m. The high portions 49m, 50m are provided on the side away from the lubricant supply hole 42a (right side) with respect to the low portions 49n, 50n in the axial direction of the reverse shaft 9, and the low portions 49n, 50n are provided on the side closer to the lubricant supply hole 42a (left side) with respect to the high portions 49m, 50m in the axial direction of the reverse shaft 9.

[0106] That is, the rear wall 49 and the front wall 50 are formed so that their heights change in the axial direction of the reverse shaft 9 .

[0107] The left side wall 51 protrudes upward from the left edge 48 c of the lubricant introduction hole 48 , and connects the left end of the front side wall 50 and the left end of the rear side wall 49 .

[0108] That is, the left side wall 51 protrudes upward from the left edge 48c of the lubricant oil introduction hole 48 on the lubricant oil supply hole 42a side in the axial direction of the reverse shaft 9.

[0109] The right side wall 52 protrudes upward from the right edge 48d of the lubricant introduction hole 48, and connects the right end of the front side wall 50 and the right end of the rear side wall 49 together.

[0110] That is, the right side wall 52 protrudes upward from a right edge portion 48d of the lubricant oil introduction hole 48 on the opposite side to the lubricant oil supply hole 42a in the axial direction of the reverse shaft 9. The vertical length of the right side wall 52 is longer than the vertical length of the left side wall 51. That is, the right side wall 52 is formed higher than the left side wall 51.

[0111] In this embodiment, the rear wall 49, the front wall 50, the left side wall 51 and the right side wall 52 form peripheral walls that surround the lubricant introduction hole 48. The left side wall 51 forms the introduction hole side vertical wall portion.

[0112] The inclined wall 53 is inclined downward in the axial direction of the reverse shaft 9 from the upper end portion 51a of the left side wall 51 toward the lubricant oil supply hole 42a.

[0113] As shown in FIGS. 3 and 4, a guide plate 54A is provided on the lower surface of the bottom plate 42 of the oil gutter 41.

[0114] The guide plate 54A protrudes downward from the rear edge 48a of the lubricant oil introduction hole 48, and extends along the rear edge 48a in the axial direction of the reverse shaft 9. Specifically, the guide plate 54A is inclined downward relative to the rear edge 48a of the lubricant oil introduction hole 48 so as to move away from the axis 9a of the reverse shaft 9.

[0115] As a result, the guide plate 54A is inclined so as to approach the arc-shaped wall portion 4r from the rear edge portion 48a of the lubricant oil introduction hole 48.

[0116] 5, when the oil gutter 41 is viewed from the axial direction of the reverse shaft 9, the guide plate 54A is located on an extension line C1 of the arc-shaped wall portion 4r. In other words, the guide plate 54A is installed at a position that passes through the extension line C1 of the arc-shaped wall portion 4r.

[0117] As shown in Figures 3 and 4, guide plates 54B and 54C are provided on the lower part of the bottom plate 42. As shown in Figure 3, the guide plate 54B protrudes downward from the left edge 48c of the lubricant introduction hole 48 toward the vertical wall portion 4C, and its lower end is connected to the guide plate 54A. In this embodiment, the guide plate 54A constitutes a guide portion, and the guide plate 54B constitutes a protruding wall. The left edge 48c constitutes an edge located at one end of the axial direction of the rotating shaft.

[0118] The guide plate 54C protrudes downward from the right edge 48d of the lubricant introduction hole 48, and its lower end is connected to the guide plate 54A. The guide plate 54B and the guide 54C face each other in the axial direction of the reverse shaft 9, and the guide plate 54A is disposed between the guide plate 54B and the guide 54C in the axial direction of the reverse shaft 9.

[0119] 6, a lubricating oil passage 4s is provided in the vertical wall portion 4C of the left case 4. The lubricating oil passage 4s has an opening 4h that opens toward the guide plate 54B, and the opening 4h communicates with the left end portion of the reverse shaft 9.

[0120] A lubricating oil passage 9s is provided inside the reverse shaft 9, and the left end of the lubricating oil passage 9s is open. The lubricating oil supplied from the lubricating oil passage 4s to the left end of the reverse shaft 9 lubricates the bearing 17G and is then introduced into the lubricating oil passage 9s.

[0121] The lubricating oil introduced into the lubricating oil passage 9s is supplied to the reverse idler gears 9A, 9B and the synchronizer 31C by the centrifugal force generated by the rotation of the reverse shaft 9. As a result, the reverse idler gears 9A, 9B and the synchronizer 31C are lubricated by the lubricating oil.

[0122] Next, the effects of the transmission 1 of this embodiment will be described. When the vehicle is traveling forward, the lubricating oil O stored in the bottom of the transmission case 3 is scooped up by the reverse idler gear 9A rotating in the counterclockwise direction R as viewed from the right in FIG.

[0123] The transmission 1 of this embodiment has an oil gutter 41 that passes directly above the reverse idler gear 9A, extends in the axial direction of the reverse shaft 9, and captures the lubricating oil scooped up by the reverse idler gear 9A and supplies it to the left end 7f of the input shaft 7.

[0124] The oil gutter 41 has a bottom plate 42, an oil passage 47 defined by a front wall 43, a rear wall 44, a left side wall 45 and a right side wall 46 which protrude upward from the bottom plate 42, a lubricating oil inlet hole 48 which penetrates the bottom plate 42 in the vertical direction so as to be positioned directly above the reverse idler gear 9A and introduces the lubricating oil scooped up by the reverse idler gear 9A into the oil passage 47, and a lubricating oil supply hole 42a which supplies the lubricating oil flowing through the oil passage 47 to the left end 7f of the input shaft 7.

[0125] The left case 4 has a bottom wall 4A, a vertical wall portion 4C extending upward from the bottom wall 4A and aligned with the reverse idler gear 9A in the axial direction of the reverse shaft 9, and an arc-shaped wall portion 4r extending upward from the bottom wall 4A of the left case 4 while curving along the outer circumferential shape of the reverse idler gear 9A and facing the reverse idler gear 9A in the radial direction of the reverse idler gear 9A.

[0126] In addition, the upper end 4n of the arcuate wall portion 4r is located above the axis 9a of the reverse shaft 9.

[0127] This allows a narrow space to be formed between the reverse idler gear 9A and the vertical wall portion 4C and the arc-shaped wall portion 4r.

[0128] Therefore, the lubricating oil O1 (see FIG. 5) scooped up by the reverse idler gear 9A can be efficiently guided along the vertical wall portion 4C and the arc-shaped wall portion 4r to the oil gutter 41, and a portion of the lubricating oil scooped up by the oil gutter 41 can be prevented from splashing around the oil gutter 41 before reaching the oil gutter 41. As a result, the amount of lubricating oil scooped up toward the oil gutter 41 can be increased.

[0129] A portion of the lubricating oil scooped up by the reverse idler gear 9A (this lubricating oil is shown as lubricating oil O2 in Figure 7) is introduced into the oil passage 47 through the lubricating oil inlet hole 48, and the remaining lubricating oil (this lubricating oil is shown as lubricating oil O3 in Figure 7) passes over the front side wall 43 and is introduced into the oil passage 47.

[0130] This allows a larger amount of lubricating oil to be efficiently introduced into the oil passage 47 by the reverse idler gear 9A, and the amount of lubricating oil captured in the oil gutter 41 can be increased.

[0131] Therefore, a large amount of lubricating oil can be smoothly guided to the lubricating oil supply hole 42a by the oil gutter 41, and a large amount of lubricating oil can be supplied to the left end portion 7f of the input shaft 7 from the lubricating oil supply hole 42a.

[0132] As a result, a large amount of lubricating oil can be supplied from the left end 7f of the input shaft 7 to the input gears 7C, 7D, 7E, 7F, bearing 17C and synchronizers 31A and 31B, improving the lubrication performance of the input gears 7C, 7D, 7E, 7F, bearing 17C and synchronizers 31A and 31B.

[0133] In addition, the transmission 1 of this embodiment introduces the lubricating oil scooped up by the final driven gear 12 into the catch tank 19 and temporarily stores it there, and also temporarily stores the lubricating oil scooped up by the reverse idler gear 9A in the oil gutter 41, thereby enabling the oil level of the lubricating oil O to be lowered.

[0134] This reduces the agitation resistance of the final driven gear 12 and the reverse idler gear 9A, and allows the lubricating oil scooped up by the engine to be temporarily stored in the oil gutter 41. As a result, the oil level of the lubricating oil O can be lowered, and the fuel consumption of the engine 2 can be reduced.

[0135] Here, the vertical wall portion 4C is located on the left side wall 4L side of the reverse idler gear 9A and is aligned with the reverse idler gear 9A in the axial direction of the reverse shaft 9, so that the space between the reverse idler gear 9A and the vertical wall portion 4C is narrow.

[0136] Therefore, the lubricating oil scooped up by the reverse idler gear 9A has a strong force on the reverse idler gear 9A side facing the vertical wall portion 4C and a weak force on the reverse idler gear 9A side away from the vertical wall portion 4C.

[0137] According to the transmission 1 of this embodiment, the lubricating oil introduction hole 48 is positioned so that the left edge portion 48c is aligned vertically with the vertical wall portion 4C, and extends in the axial direction of the reverse shaft 9 so as to move away from the axis 9a of the reverse shaft 9 as it moves from the left edge portion 48c to the right edge portion 48d.

[0138] This allows the lubricant introduction hole 48 located at the upper part on the reverse idler gear 9A side to approach the arc-shaped wall portion 4r as it moves away from the vertical wall portion 4C.

[0139] Therefore, the lubricating oil scooped up by the reverse idler gear 9A can be smoothly guided along the arc-shaped wall portion 4r to the lubricating oil introduction hole 48, and the amount of lubricating oil captured in the oil gutter 41 can be increased.

[0140] Furthermore, according to the transmission 1 of this embodiment, a guide plate 54A is provided on the underside of the bottom plate 42, and the guide plate 54A extends in the axial direction of the reverse shaft 9 along the rear edge portion 48a of the lubricating oil introduction hole 48 and protrudes downward from the rear edge portion 48a so as to move away from the axis 9a of the reverse shaft 9.

[0141] In addition, when the oil gutter 41 is viewed from the axial direction of the reverse shaft 9, the guide plate 54A is located on an extension line C1 of the arc-shaped wall portion 4r.

[0142] As a result, the lubricating oil scooped up along the arc-shaped wall portion 4r by the rotation of the reverse idler gear 9A can be introduced into the oil passage 47 through the lubricating oil introduction hole 48 while maintaining a strong momentum. Therefore, more lubricating oil can be introduced into the oil passage 47, and the amount of lubricating oil captured in the oil gutter 41 can be increased.

[0143] Furthermore, according to the transmission 1 of this embodiment, the guide plates 54B, 54C are provided on the lower part of the bottom plate 42, and the guide plates 54B, 54C extend downward from the left edge 48c and the right end 48d of the lubricant introduction hole 48.

[0144] In addition, the guide plate 54A is disposed between the guide plate 54B and the guide 54C in the axial direction of the reverse shaft 9.

[0145] This prevents the lubricating oil scraped up along the arc-shaped wall portion 4r by the rotation of the reverse idler gear 9A from flowing outward in the axial direction of the reverse shaft 9 from the guide plates 54B, 54C, and more effectively increases the amount of lubricating oil captured in the oil gutter 41.

[0146] In addition, according to the transmission 1 of this embodiment, the lubricating oil introduction hole 48 has a rear side wall 49, a front side wall 50, a left side wall 51 and a right side wall 52 which protrude upward from the rear edge portion 48a, the front edge portion 48b, the left edge portion 48c and the right edge portion 48d of the lubricating oil introduction hole 48 and surround the lubricating oil introduction hole 48.

[0147] As a result, when the lubricating oil introduced into the oil passage 47 from the lubricating oil inlet hole 48 attempts to flow back into the lubricating oil inlet hole 48, the lubricating oil can be blocked by the rear side wall 49, the front side wall 50, the left side wall 51 and the right side wall 52.

[0148] This makes it possible to prevent the lubricating oil introduced from the lubricating oil introduction hole 48 into the oil passage 47 from flowing back from the oil passage 47 to the lubricating oil introduction hole 48, allowing a larger amount of lubricating oil to be introduced into the oil gutter 41. As a result, the amount of lubricating oil captured in the oil gutter 41 can be increased.

[0149] Furthermore, according to the transmission 1 of this embodiment, the guide plate 54B is provided on the lower part of the bottom plate 42, and the guide plate 54B protrudes from the left edge 48c of the lubricant introduction hole 48 towards the vertical wall portion 4C.

[0150] In addition, the vertical wall portion 4C is provided with a support portion that rotatably supports the left end portion of the reverse shaft 9 via a bearing 17G, and a lubricating oil passage 4s that has an opening 4h that opens toward the guide plate 54B and guides the lubricating oil introduced from the opening 4h to the left end portion of the reverse shaft 9.

[0151] As a result, the lubricating oil that is not introduced from the lubricating oil introduction hole 48 into the oil gutter 41 can be directed from the guide plate 54B toward the opening 4h and supplied from the opening 4h to the left end of the reverse shaft 9 through the lubricating oil passage 4s.

[0152] Therefore, the lubricating oil can be introduced into the lubricating oil passage 9s of the reverse shaft 9, and the lubricating oil can be supplied from the lubricating oil passage 9s to the reverse idler gears 9A, 9B and the synchronizer 31C. Therefore, the idler gears 9A, 9B and the synchronizer 31C can be lubricated by the lubricating oil.

[0153] Although the transmission 1 of this embodiment is applied to a FF vehicle, when the transmission is applied to a FR (front engine, rear drive) vehicle in which the input shaft 7 and reverse shaft 9 extend in the fore-and-aft direction, the oil gutter 41 extends in the fore-and-aft direction along the axial direction of the reverse shaft 9.

[0154] Further, the oil gutter 41 in this embodiment supplies the lubricating oil scooped up by the reverse idler gear 9A to the left end 7f of the input shaft 7 adjacent to the reverse shaft 9, but this is not limited to this.

[0155] For example, in the case where the counter shaft 8 constitutes the rotating shaft, the lubricating oil scooped up by a specific counter gear of the counter shaft 8 may be captured by the oil gutter 41, and the lubricating oil flowing through the oil passage 47 may be supplied to the left end of the counter shaft 8.

[0156] That is, the lubricating oil scooped up by the oil gutter 41 may be supplied to the same shaft by a gear member provided on the same shaft.

[0157] Although the power transmission device of the present embodiment is applied to a transmission, it is not limited to a transmission as long as it is a power transmission device that includes a rotating shaft having a gear member and an oil gutter.

[0158] Although an embodiment of the invention has been disclosed, it will be apparent to one of ordinary skill in the art that modifications may be made therein without departing from the spirit and scope of the invention, and it is intended that all such modifications and equivalents be included in the following claims. [Explanation of symbols]

[0159] 1...transmission (power transmission device), 3...transmission case (case member), 4C...vertical wall portion, 4h...opening, 4n...upper end portion (upper end portion of rotating shaft), 4r...arc-shaped wall portion, 4s...lubricating oil passage, 7C, 7D, 7E, 7F...input gear (portion supplied with lubricating oil), 9...reverse shaft (rotating shaft), 9A...reverse idler gear (gear member), 9a...axis line (axis line of rotating shaft), 17C...bearing (portion supplied with lubricating oil), 31A, 31B...synchronizing device (portion supplied with lubricating oil), 41...oil gutter, 42...bottom plate, 43...front side wall (side wall), 44...rear side wall (side wall), 45...left side wall (side wall), 46...right side wall (side wall), 48...lubricant introduction hole, 48a...rear edge portion (edge ​​portion of lubricant introduction hole on the axial side of the rotating shaft), 48b...front edge portion (edge ​​portion of lubricant introduction hole), 48c...left edge portion (edge ​​portion of lubricant introduction hole, edge portion located at one end portion in the axial direction of the rotating shaft), 48d...right edge portion (edge ​​portion of lubricant introduction hole), 49...rear side wall (circumferential wall), 50...front side wall (circumferential wall), 51...left side wall (circumferential wall), 52...right side wall (circumferential wall), 54A...guide plate (guide portion), 54B...guide plate (protruding wall), C1...extension line of arc-shaped wall portion

Claims

1. a case member having a bottom portion in which lubricating oil is stored; a rotating shaft having a gear member that scoops up the lubricating oil stored in the bottom of the case member and that is rotatably supported by the case member; an oil gutter that passes directly above the gear member, extends in the axial direction of the rotating shaft, captures the lubricating oil scooped up by the gear member, and supplies it to a lubricating oil supply portion; The oil gutter is a power transmission device having an oil passage formed by a bottom plate and a side wall protruding upward from the bottom plate, a lubricant oil introduction hole that penetrates the bottom plate in the vertical direction so as to be located directly above the gear member and introduces the lubricant oil scooped up by the gear member into the oil passage, and a lubricant oil supply part that supplies the lubricant oil flowing through the oil passage to the lubricant oil supply part, the case member has a bottom wall, a vertical wall portion extending upward from the bottom wall and aligned with the gear member in the axial direction of the rotation shaft, and an arc-shaped wall portion extending upward from the bottom wall of the case member while curving along an outer circumferential shape of the gear member and facing the gear member in the radial direction of the gear member, an upper end of the arcuate wall portion is located above an axis of the rotation shaft, A protruding wall is provided on the lower part of the bottom plate, the protruding wall protrudes from an edge of the lubricant oil introduction hole located at one end of the rotating shaft in the axial direction toward the vertical wall portion, a support portion that rotatably supports the end of the rotating shaft, the support portion having an opening that opens toward the protruding wall, and a lubricating oil passage that supplies lubricating oil introduced from the opening to the end of the rotating shaft.

2. 2. The power transmission device according to claim 1, wherein the lubricating oil introduction hole is positioned such that one end in the axial direction of the rotating shaft is aligned vertically with the vertical wall portion, and extends in the axial direction of the rotating shaft so as to move away from the axis of the rotating shaft as it moves from the one end in the axial direction of the rotating shaft to the other end in the axial direction of the rotating shaft.

3. A guide portion is provided on the lower surface of the bottom plate, the guide portion extends in the axial direction of the rotating shaft along an edge portion of the lubricant oil introduction hole on the axial side of the rotating shaft and protrudes downward from the edge portion so as to be away from the axis of the rotating shaft, 3. The power transmission device according to claim 1, wherein the guide portion is located on an extension of the arc-shaped wall portion when the oil gutter is viewed from the axial direction of the rotating shaft.

4. 4. The power transmission device according to claim 1, wherein the oil gutter protrudes upward from an edge of the lubricant oil introduction hole and has a peripheral wall surrounding the lubricant oil introduction hole.

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