JP2016148391A - Vehicular transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular transmission which can reduce the agitation resistance of a counter gear and a final gear immersed in oil, and can reduce a power loss.SOLUTION: A transmission 2 has a partition wall 33 which projects out from a bulkhead 4B below a counter gear 13 and a final gear 16, and extends from the lower side of a catch tank 30 below the final gear 16 along lower edges of the counter gear 13 and the final gear 16. Also, the transmission 2 is equipped with the catch tank 30 installed on the opposite side to a counter shaft 9 to an input shaft 8, and storing oil scraped up by the final gear 16. A lower oil collecting portion 25B is installed below a lower oil discharge port 30B, and the lower oil collecting portion 25B is communicated with the lower oil discharge port 30B and an upper oil collecting portion 25A.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle transmission, and more particularly, to a vehicle transmission having a catch tank that temporarily stores oil.

  In a transmission mounted on a vehicle such as an automobile, oil that lubricates a meshing portion of a gear is stored in a main body case of the transmission. In this transmission, when the amount of oil is large, the agitation resistance of the gear increases. Therefore, the agitation resistance due to the rotation of the gear is reduced by temporarily storing the oil during the rotation of the gear and lowering the oil level. A catch tank is provided to reduce this.

  A transmission having a catch tank includes a catch tank that receives and stores oil splashed by a gear, a drain valve that opens and closes an oil discharge port on the bottom side of the catch tank, and a drain when the parking position P is selected. The valve is opened and the oil in the catch tank is returned to the main body case to raise the oil level in the main body case while the drain valve is turned on when the drive system shift positions R, N, and D are selected. There is known a liquid level height adjusting means having a drive mechanism that closes and stores oil in the main body case in the catch tank to lower the oil level in the main body case to a low level (for example, , See Patent Document 1).

JP 2008-51176 A

  In such a conventional transmission, when the drive system shift position is in the R, N, and D positions, the drain valve is closed, whereby oil is stored in the catch tank. Thereby, the oil stored in the main body case needs to be excessively stored in advance at the bottom of the main body case.

  For this reason, when the drive system shift position is at the parking position P position, the surface area of the gear immersed in the oil increases, and the oil due to the rotation of the gear from the start of the gear rotation until the oil is full in the catch tank. Stirring resistance increases. As a result, there is a problem that the power loss of the transmission increases.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a vehicle transmission that can reduce the stirring resistance of the counter gear and the final gear immersed in oil and can reduce power loss. It is what.

  The present invention relates to a transmission case that is coupled to a clutch housing that houses a clutch mechanism so as to face each other with a partition wall therebetween, and that has an oil reservoir for storing oil therein, and is installed inside the transmission case. An input shaft to which the power of the internal combustion engine is transmitted via the input shaft, an input gear attached to the input shaft, a counter gear and a counter gear that are installed inside the transmission case, mesh with the input gear, and the lower part is immersed in oil A counter shaft having a final drive gear adjacent to the differential gear shaft, and a differential gear shaft that is installed inside the transmission case, has a final gear that meshes with the final drive gear and has a lower portion that is immersed in oil, and transmits power to the left and right drive wheels. Counter for input axis And a catch tank that stores oil scooped up by a final gear, and the catch tank has an upper oil introduction port through which oil is introduced and a lower oil discharge port through which oil is discharged. A transmission for a vehicle configured to extend in a vertical direction along the partition wall, and protrudes from the partition wall below the counter gear and the final gear, and from below the catch tank to the lower edge of the counter gear and the final gear. The oil reservoir is divided into an upper oil reservoir and a lower oil reservoir with the partition wall interposed therebetween, and the lower oil reservoir is separated from the lower oil outlet. Installed below and communicated with the lower oil outlet and the upper oil reservoir. And it is configured from the.

  As described above, according to the present invention, the partition wall that protrudes from the partition wall to the lower side of the counter gear and the final gear and extends downward from the catch tank along the lower edge of the counter gear and the final gear is provided. .

  As a result, the amount of oil immersed in the counter gear and the final gear in the upper oil reservoir can be reduced, and the amount of oil stirred by the rotation of the counter gear and the final gear can be reduced.

  In addition, according to the present invention, there is provided a catch tank that is installed on the side opposite to the counter shaft with respect to the input shaft and stores the oil scraped up by the final gear. As a result, the amount of oil immersed in the counter gear and final gear in the upper oil reservoir can be further reduced, and the amount of oil stirred by the rotation of the counter gear and final gear can be further reduced.

  Further, according to the present invention, the lower oil reservoir portion of the catch tank is installed below the lower oil discharge port, and the lower oil reservoir portion is communicated with the lower oil discharge port. The discharged oil can be discharged to the lower oil reservoir. For this reason, the oil quantity stirred by rotation of a counter gear and a final gear can be reduced.

Further, according to the present invention, the lower oil reservoir is communicated with the lower oil outlet and the upper oil reservoir, so that the oil flowing to the catch tank side by the rotation of the counter gear is transferred from the lower oil outlet to the lower oil reservoir. The flow of oil discharged to the reservoir can be caused to flow from the upper oil reservoir to the lower oil reservoir. Thereby, the oil quantity stirred by rotation of a final gear can be reduced.
As a result, the stirring resistance of the counter gear and the final gear can be reduced, and the power loss of the transmission can be reduced.

FIG. 1 is a diagram showing an embodiment of a vehicle transmission according to the present invention, and is a plan view of a front portion of a vehicle. FIG. 2 is a view showing an embodiment of the vehicle transmission of the present invention, and is a side view of the transmission as seen from the transmission case side with the transmission case hidden. FIG. 3 is a diagram showing an embodiment of a vehicle transmission according to the present invention, in which a transmission case, a shift tower, a shift and select shaft, and gears are not shown, and a side view of the transmission viewed from the transmission case side. It is. FIG. 4 is a view showing an embodiment of the vehicle transmission of the present invention, and is a side view of the transmission as viewed from the clutch housing side with the clutch housing not shown. FIG. 5 is a view showing an embodiment of the vehicle transmission of the present invention and a side view of the clutch housing. FIG. 6 is a view showing an embodiment of the vehicle transmission of the present invention, and is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a view showing an embodiment of the vehicle transmission of the present invention, and is a cross-sectional view taken along the line VII-VII in FIG. FIG. 8 is a view showing an embodiment of the vehicle transmission according to the present invention, which is a cross-sectional view of a transmission having an extension portion of another shape, and is a cross-sectional view taken along the direction of arrows VI-VI in FIG. It corresponds to.

Hereinafter, an embodiment of a vehicle transmission according to the present invention will be described with reference to the drawings.
FIGS. 1-8 is a figure which shows the transmission for vehicles of one Embodiment which concerns on this invention.
First, the configuration will be described.
In FIG. 1, a vehicle 1 includes a vehicle body 1A, and a transmission 2 is mounted in an engine room 3 in front of the vehicle body 1A in the front-rear direction. 1 to 8, the directions indicated by up, down, right, and left are directions viewed from the driver's seat.

  The transmission 2 includes a clutch housing 4 and a transmission case 5, and the clutch housing 4 is connected to an engine 6 as an internal combustion engine. In FIG. 7, the clutch mechanism 7 is accommodated in the clutch housing 4, and the input shaft 8 is accommodated in the transmission case 5.

  The clutch mechanism 7 transmits and cuts power from the crankshaft to the input shaft 8 by connecting and disconnecting a crankshaft (not shown) of the engine 6 and the input shaft 8 via a flywheel (not shown). That is, the power of the engine 6 is transmitted to the input shaft 8 through the clutch mechanism 7.

  2 and 4, the transmission case 5 accommodates an input shaft 8, counter shafts 9, 10 and a differential device 11, and the rotation shafts of the input shaft 8, the counter shafts 9, 10 and the differential device 11 are Installed in parallel.

  In FIG. 1, the clutch housing 4 includes a joint 4A, and the transmission case 5 includes a joint 5A that is joined to the joint 4A by bolting. A partition 4B is formed in the clutch housing 4 (see FIGS. 2 and 3), and the transmission case 5 is coupled to the clutch housing 4 so as to face each other with the partition 4B interposed therebetween.

  In FIG. 7, the partition wall 4 </ b> B partitions the inside of the transmission 2 into a clutch chamber 22 that houses the clutch mechanism 7, and a transmission chamber 23 that houses the input shaft 8 and the counter shafts 9 and 10. The partition 4B may be provided in the transmission case 5.

  In FIG. 7, the input shaft 8 and the counter shaft 9 are rotatably attached to the partition wall 4 </ b> B and the transmission case 5. The counter shaft 10 is also rotatably attached to the partition wall 4B and the transmission case 5.

  In FIG. 2, the input shaft 8 is provided with a plurality of input gears 12 in the axial direction of the input shaft 8. The counter shaft 9 is installed below the input shaft 8. As shown in FIG. 7, the counter shaft 9 is provided with a plurality of counter gears 13 in the axial direction of the counter shaft 9, and the counter gear 13 meshes with the input gear 12.

  In FIG. 2, the counter shaft 10 is installed above the input shaft 8. The counter shaft 10 is provided with a plurality of counter gears 14 in the axial direction of the counter shaft 10, and the counter gear 14 meshes with the input gear 12.

  Here, the counter shaft 9 of the present embodiment constitutes the first counter shaft of the present invention, and the counter shaft 10 constitutes the second counter shaft of the present invention. The counter gear 13 constitutes the first counter gear of the present invention, and the counter gear 14 constitutes the second counter gear of the present invention.

  The input gear 12 and the counter gears 13 and 14 are provided in a number corresponding to the shift speed (for example, 5 if the shift speed is 5), and the input gear 12 and the counter gear 13 corresponding to the shift speed are provided. , 14 are engaged, and the power is transmitted from the input gear 12 to the counter gear 13 or the counter gear 14 of a predetermined gear stage, so that the rotational speed of the input shaft 8 is changed to a rotational speed corresponding to the predetermined gear stage. It is transmitted to the shaft 10.

  1 and 7, the differential device 11 includes a differential gear case 15 and a final gear 16 attached to the differential gear case 15, and the final gear 16 meshes with a final drive gear 9 </ b> F provided on the counter shaft 9. Yes. The counter shaft 10 is also provided with a final drive gear (not shown), and this final drive gear meshes with the final gear 16.

  In FIG. 7, a differential gear case 15 includes a pinion shaft 17 that rotates integrally with the differential gear case 15, a pair of pinion gears 18A and 18B that are rotatably supported at the front and rear ends of the pinion shaft 17, and pinion gears 18A and 18B. A pair of side gears 19A and 19B meshing with each other is provided.

  One end portions of the drive shafts 21L and 21R are inserted at both ends in the vehicle width direction along the rotational axis of the differential gear case 15, and one end portions of the drive shafts 21L and 21R are fitted to the side gears 19A and 19B. . In addition, the rotating shaft of the differential apparatus 11 is comprised from the drive shafts 21L and 21R, and the drive shafts 21L and 21R comprise the differential gear shaft of this invention.

  The drive shafts 21L and 21R are connected to the left and right drive wheels 24L and 24R, respectively (see FIG. 1). The pinion shaft 17 is attached to the differential gear case 15 so that its axial direction is perpendicular to the rotational axis of the differential gear case 15.

  The pair of pinion gears 18 </ b> A and 18 </ b> B revolves around the rotation axis of the differential gear case 15 and rotates around the axis of the pinion shaft 17 when the differential gear case 15 rotates.

  Further, the pair of side gears 19A and 19B are arranged coaxially with the rotation axis of the differential gear case 15 and opposed to the inside of the differential gear case 15, and one end of the drive shafts 21L and 21R along the rotation axis. It has a plurality of spline teeth for spline joining the parts.

  In the differential device 11 configured as described above, when the vehicle 1 travels straight on a flat road, the differential gear case 15 rotates when power is transmitted from the final drive gear 9F to the final gear 16.

  At this time, since the rolling distances of the left and right drive wheels 24L, 24R are equal, the pair of side gears 19A, 19B rotate at the same rotational speed, and the pinion gears 18A, 18B sandwiched between the side gears 19A, 19B rotate. First, the differential gear case 15, the pinion gears 18A and 18B, and the side gears 19A and 19B revolve together.

  When the vehicle 1 makes a curve, the rolling distance of one of the drive wheels 24L and 24R outside the curve is longer than the other of the drive wheels 24L and 24R inside the curve, so one of the side gears 19A and 19B outside the curve is It rotates faster than the other of the side gears 19A and 19B inside the curve.

  At this time, one of the side gears 19A, 19B outside the curve rotates faster than the differential gear case 15, and the other of the side gears 19A, 19B inside the curve rotates slower than the differential gear case 15.

  Accordingly, the pinion gears 18A and 18B sandwiched between the pair of side gears 19A and 19B not only revolve but also rotate, and the power from the differential gear case 15 is applied to the left and right sides 19A and 19B rotating at different speeds. I can tell you.

  2 to 5, the bottoms of the clutch housing 4 and the transmission case 5 constitute an oil reservoir 25, and oil O is stored in the oil reservoir 25 (see FIGS. 2 and 4). 2 and 4, the liquid level of the oil O is indicated by a broken line.

  Lower portions of the counter gear 13 and the final gear 16 of the present embodiment are immersed in the oil O. In other words, the oil O is stored in the oil reservoir 25 by an amount that immerses the lower portions of the counter gear 13 and the final gear 16.

  3 and 4, a catch tank 30 is provided in the clutch housing 4 and the transmission case 5, and the catch tank 30 is installed on the opposite side of the counter shaft 9 with respect to the input shaft 8. The catch tank 30 includes a partition 4B and a plate member 31 having a U-shaped cross section that is attached to the partition 4B and forms a space 32 (FIG. 6) between the catch tank 30 and the catch tank 30. 30 stores the oil scooped up by the final gear 16.

  The catch tank 30 has an upper oil inlet 30A through which oil is introduced and a lower oil outlet 30B (see FIGS. 3 and 4) through which oil is discharged, and extends in the vertical direction along the partition wall 4B. That is, the plate member 31 extends in the vertical direction along the partition wall 4 </ b> B, and the region of the partition wall 4 </ b> B extending in the vertical direction facing the plate member 31 also forms the catch tank 30.

  2 to 5, a partition wall 33 is provided below the clutch housing 4 and the transmission case 5, and the partition wall 33 is provided on the partition wall 33 </ b> A provided on the clutch housing 4 and the transmission case 5. It is comprised from the partition wall 33B.

  The partition wall 33A protrudes below the counter gear 13 and the final gear 16 from the partition wall 4B, and the partition wall 33B protrudes from the peripheral wall 5B of the transmission case 5 facing the partition wall 4B toward the bottom of the counter gear 13A. The protruding end is in contact with the protruding end of the partition wall 33A. That is, the partition wall 33 of the present embodiment protrudes below the counter gear 13 and the final gear 16 from the partition wall 4B. Hereinafter, the partition walls 33A and 33B will be described simply as the partition wall 33.

  The partition wall 33 extends from the lower side of the catch tank 30 along the lower edges of the counter gear 13A and the final gear 16 to the lower side of the final gear 16, and the oil reservoir 25 has an upper oil reservoir with the partition wall 33 interposed therebetween. It is divided into 25A and a lower oil reservoir 25B.

  In FIG. 7, the final gear 16 is provided at the end of the counter shaft 9 on the clutch mechanism 7 side, and faces the catch tank 30 in the front-rear direction of the vehicle 1. Therefore, the oil scraped up by the final gear 16 is introduced into the catch tank 30 from the upper oil inlet 30A.

  3 to 5, the lower oil reservoir 25 </ b> B is installed below the lower oil discharge port 30 </ b> B of the catch tank 30. The lower oil reservoir 25B has a space 26 that is partitioned from the transmission chamber 23 in which the counter gear 13 and the final gear 16 are installed below the partition wall 33. The transmission chamber 23 of the present embodiment constitutes a space on the upper oil reservoir portion side of the present invention.

  2 and 3, the lower oil reservoir 25B opens toward the final gear 16 and the oil communication port 25a communicating with the lower oil outlet 30B and the upper oil reservoir 25A. And an oil supply port 25 b for supplying oil to the gear 16. Therefore, lower oil reservoir 25B of the present embodiment communicates with lower oil outlet 30B and upper oil reservoir 25A.

  In FIG. 2, the counter shafts 9 and 10 are provided with meshing clutches 34 and 35. The meshing clutches 34 and 35 are moved in the axial direction of the counter shafts 9 and 10 to connect the input gear 12 and the counter gear 13 or the input gear 12 and the counter gear 14 constituting the shift stage. Power is transmitted from the shaft 8 to the counter shaft 9 or the counter shaft 10 at a rotational speed corresponding to the gear position.

  In FIG. 7, only one of the meshing clutches 34 is shown. In FIG. 7, an input gear 12A constituting the first gear and an input gear 12B constituting the second gear are fixed to the input shaft 8, and constitute a counter gear 13A constituting the first gear and the second gear. The counter gear 13B is rotatable relative to the counter shaft 10.

  The meshing clutch 34 is provided between the counter gear 13A and the counter gear 13B. When the first gear is established, the meshing clutch 34 moves to one of the axial directions of the counter shaft 10 (in the direction approaching the clutch mechanism 7), and the counter gear 13A and the counter shaft 9 are spline-fitted. As a result, power is transmitted from the input shaft 8 to the counter shaft 9 via the input gear 12A and the counter gear 13A.

Further, when the second gear is established, the meshing clutch 34 moves to the other axial direction of the counter shaft 10 (direction away from the clutch mechanism 7), and the counter gear 13B and the counter shaft 9 are spline-fitted. Let As a result, power is transmitted from the input shaft 8 to the counter shaft 9 via the input gear 12B and the counter gear 13B.
The meshing clutches 34 and 35 are provided between the counter gears 13 and 14 of the counter shafts 9 and 10, and fix the counter gears 13 and 14 to the counter shafts 9 and 10 according to the gear position.

  In FIG. 2, shift forks 36A to 36D are attached to the meshing clutches 34 and 35, and the shift forks 36A to 36D are fixed to shifter shafts 37A to 37D.

  The shifter shafts 37A to 37D are attached to the partition wall 4B and the peripheral wall 5B of the transmission case 5 so as not to rotate and to be movable in the axial direction, and shift pieces 38A to 38D are fixed to the shifter shafts 37A to 37D.

  When one of the shift pieces 38A and 38B is engaged with an arm portion (not shown) provided on the top of the shift and select shaft 39 (see FIGS. 2 and 6), the shift and select shaft 39 rotates. Shifter shafts 37A and 37B are moved in the axial direction. At this time, the meshing clutch 35 moves in the axial direction of the counter shaft 10, thereby fixing the counter gear 14 constituting a predetermined stage to the counter shaft 10.

  When one of the shift pieces 38C and 38D is engaged with an arm portion (not shown) provided below the shift and select shaft 39, when the shift and select shaft 39 rotates, the shifter shafts 37C and 37D are moved. Move in the axial direction. At this time, the meshing clutch 34 moves in the axial direction of the counter shaft 9, whereby the counter gear 13 constituting a predetermined stage is fixed to the counter shaft 9.

3 and 5, the partition 4B is formed with a boss-shaped support 4a that rotatably supports the input shaft 8 and one end of the shifter shafts 37C and 37D formed below the support 4a. A pair of boss portions 4b, 4c and a reinforcing rib 4d for connecting the pair of boss portions 4b, 4c and the support portion 4a are formed.
In FIG. 5, bolt holes 4e to 4h are formed in the clutch housing 4 in the vicinity of the upper portion of the support portion 4a, the reinforcing rib 4d, and the joint portion 4A.

  In FIG. 3, the side edge 31a of the plate member 31 facing the input shaft 8 with respect to the vertical axis is formed along the support portion 4a, the boss portions 4b and 4c, and the reinforcing rib 4d. A bolt (not shown) is fastened to the bolt holes 4e to 4h through the plate member 31 to be connected to the support portion 4a, the boss portions 4b and 4c, and the reinforcing rib 4d.

  Boss portions 4i and 4j are formed above the support portion 4a, and one end portions of shifter shafts 37A and 37B are inserted into the boss portions 4i and 4j. The boss part 4j and the support part 4a are connected by a reinforcing rib 4k, and the upper part of the side edge 31a of the plate member 31 is connected to the reinforcing rib 4k.

  Here, the shifter shafts 37A and 37B of the present embodiment constitute the second shifter shaft of the present invention, and the shifter shafts 37C and 37D constitute the first shifter shaft of the present invention. The boss portions 4b and 4c constitute a first boss portion of the present invention, and the boss portions 4i and 4j constitute a second boss portion of the present invention. Furthermore, the reinforcing rib 4d constitutes the first reinforcing rib of the present invention, and the reinforcing rib 4k constitutes the second reinforcing rib of the present invention.

  4, boss portions 5c to 5f into which the other end portions of the shifter shafts 37A to 37D are inserted are formed on the peripheral wall 5B of the transmission case 5. Thus, the shifter shafts 37A to 37D are supported by the partition wall 4B of the clutch housing 4 and the peripheral wall 5B of the transmission case 5 so as to be movable in the axial direction.

  2-5, the ceiling wall 4C of the clutch housing 4 and the ceiling wall 5C of the transmission case 5 are composed of inclined portions 4s, 5a and curved portions 4t, 5b. The inclined portions 4 s and 5 a are inclined obliquely upward from the final gear 16 toward the counter shaft 10, and the curved portions 4 t and 5 b extend over the input shaft 8 from the inclined portions 4 s and 5 a of the catch tank 30. It is curved to face the upper oil inlet 30A.

  In FIG. 4, a pair of protrusions 31b and 31c are formed on the peripheral wall 31A of the plate member 31 facing the partition wall 4B, and the protrusions 31b and 31c extend discontinuously parallel to the vertical direction.

  5 and 6, a recess 4 m that bulges from the partition 4 </ b> B toward the clutch mechanism 7 is formed in the region of the partition 4 </ b> B facing the plate member 31. The recess 4m is formed with a regulation rib 4n that extends horizontally from the bottom surface of the recess 4m toward the plate member 31, and the support 4a, the reinforcing rib 4d, and the boss 4b are connected by the regulation rib 4n. Here, the bottom surface of the recess 4m is a vertical surface of the recess 4m in FIGS.

  In FIG. 6, a guide case 40 is provided in the transmission case 5. The guide case 40 is installed at a position overlapping the catch tank 30 in the axial direction of the input shaft 8 (see FIG. 2), and the guide case 40 is capable of rotating a shift and select shaft 39 that operates the shifter shafts 37A to 37D. Hold on.

  The guide case 40 includes a pedestal portion 40A attached to the ceiling wall 5C of the transmission case 5 and an extending wall 40B extending from the pedestal portion 40A toward the inside of the transmission case 5. The extending wall 40B extends from the pedestal portion 40A toward the upper end of the plate member 31, whereby the space above the catch tank 30 is formed by the extending wall 40B and the partition wall 4B.

Next, the operation will be described.
2 to 4 and 6, arrows O1 to O4 indicate the flow of oil.

  In FIG. 2, when the vehicle 1 moves forward, the rotation of the crankshaft of the engine 6 is transmitted to the input shaft 8 via the clutch mechanism 7, and when the input shaft 8 rotates in the clockwise direction R1, the counter gear 13 , 14, the counter shafts 9, 10 are rotated in the counterclockwise rotation direction R2.

  At this time, power is transmitted from the final drive gear 9F to the final gear 16, and the differential gear case 15 rotates in the clockwise direction R1, whereby the drive shafts 21L and 21R rotate in the clockwise direction R1 and the vehicle 1 moves forward. .

  Since the lower portion of the final gear 16 is immersed in the oil O, the rotation of the final gear 16 causes the oil O to be lifted upward as indicated by the oil O 1, and the oil O 1 is used as the ceiling wall of the clutch housing 4 and the transmission case 5. Move forward through 4C and 5C.

  According to the transmission 2 of the present embodiment, the final gear protrudes from the partition wall 4B below the counter gear 13 and the final gear 16, and from below the catch tank 30 along the lower edges of the counter gear 13 and the final gear 16. A partition wall 33 extending below 16 is provided.

  As a result, the amount of oil immersed in the counter gear 13 and the final gear 16 in the upper oil reservoir 25A can be reduced, and the amount of oil stirred by the rotation of the counter gear 13 and the final gear 16 can be reduced.

  In addition, according to the transmission 2 of the present embodiment, the catch tank 30 that is installed on the side opposite to the counter shaft 9 with respect to the input shaft 8 and stores the oil scooped up by the final gear 16 is provided.

  As a result, the amount of oil immersed in the counter gear 13 and the final gear 16 in the upper oil reservoir 25A can be further reduced, and the amount of oil stirred by the rotation of the counter gear 13 and the final gear 16 can be further reduced.

  Further, according to the transmission 2 of the present embodiment, the lower oil reservoir 25B is installed below the lower oil outlet 30B, and the lower oil reservoir 25B is communicated with the lower oil outlet 30B. The oil O1 discharged from the lower oil discharge port 30B of the catch tank 30 can be discharged to the lower oil reservoir 25B. For this reason, the amount of oil stirred by the rotation of the counter gear 13 and the final gear 16 can be reduced.

Furthermore, according to the transmission 2 of the present embodiment, since the lower oil reservoir 25B is communicated with the lower oil outlet 30B and the upper oil reservoir 25A, respectively, the counter gear 13 is rotated to the catch tank 30 side. The flowing oil O2 can be caused to flow from the upper oil reservoir 25A to the lower oil reservoir 25B by the flow of the oil O2 discharged from the lower oil outlet 30B to the lower oil reservoir 25B. Thereby, the oil quantity stirred by rotation of the final gear 16 can be reduced.
As a result, the stirring resistance of the counter gear 13 and the final gear 16 can be reduced, and the power loss of the transmission can be reduced.

  Further, according to the transmission 2 of the present embodiment, the lower oil reservoir 25B is installed below the lower oil outlet 30B, so that the oil O1 discharged from the lower oil outlet 30B is collected in the lower oil reservoir. It can be reliably guided to the portion 25B. Thereby, the oil O1 can be reliably prevented from flowing into the upper oil reservoir 25A, and the stirring resistance of the counter gear 13 and the final gear 16 can be more effectively reduced.

  Further, according to the transmission 2 of the present embodiment, the lower oil reservoir 25B has a space 26 that is partitioned from the transmission chamber 23 in which the counter gear 13 and the final gear 16 are installed below the partition wall 33. The lower oil reservoir 25B opens toward the final gear 16 and the oil communication port 25a communicating with the lower oil outlet 30B and the upper oil reservoir 25A, and the oil O1 is supplied from the lower oil reservoir 25B to the final gear 16. And an oil supply port 25b to be supplied.

  As a result, the oil O1 discharged from the lower oil discharge port 30B of the catch tank 30 to the lower oil reservoir 25B can be returned to the upper oil reservoir 25A through the oil supply port 25b, and the counter gear 13 and the final gear 16 can be The oil O to be immersed, that is, the oil for lubricating the meshing portion of the input gear 12 and the counter gear 13, the meshing portion of the final drive gear 9F and the final gear 16, and the like can be reliably ensured.

  Further, according to the transmission 2 of the present embodiment, the catch tank 30 includes the partition wall 4B and the plate member 31 that is attached to the partition wall 4B and forms a space 32 between the partition wall 4B. . Accordingly, the catch tank 30 can be configured simply by providing the partition member 4B with the plate member 31, and the configuration inside the transmission case 5 can be simplified.

  In FIG. 2, the partition 4B includes a support 4a that rotatably supports the input shaft 8, a boss 4b that is formed below the support 4a, and into which one end of the shifter shafts 37C and 37D is inserted, and a boss 4b and the reinforcing rib 4d for connecting the supporting portion 4a, and the side edge 31a of the plate member 31 facing the input shaft 8 with respect to the vertical axis is the supporting portion 4a, the boss portions 4b, 4c and the reinforcing rib 4d. And is connected to the support portion 4a, the boss portions 4b and 4c, and the reinforcing rib 4d.

  Here, the reaction forces F1 and F2 are generated by the meshing of the input gear 12 of the input shaft 8 and the counter gear 13 of the counter shaft 9, and the reaction between the input gear 12 of the input shaft 8 and the counter gear 14 of the counter shaft 10 occurs. Reaction forces F3 and F4 are generated by the meshing, and a load F5 from the input shaft 8 toward the catch tank 30 is generated by the reaction forces F1 to F4.

  In addition to this, the transmission 2 of the present embodiment includes meshing clutches 34 and 35 that selectively connect the input gear 12 and the counter gears 13 and 14 and shifter shafts 37A to 37D that actuate the meshing clutches 34 and 35. The shifter shafts 37A to 37D are operated by the shift and select shaft 39 via the shift pieces 38A to 38D.

  For this reason, the load F6 toward the catch tank 30 is generated from the shifter shafts 37A to 37D as the shifter shafts 37A to 37D move in the axial direction. Thereby, the plate member 31 may be deformed by the loads F5 and F6 generated toward the catch tank 30.

  On the other hand, according to the transmission 2 of the present embodiment, the side edge 31a of the plate member 31 that opposes the input shaft 8 with respect to the vertical axis includes the support portion 4a, the boss portions 4b, 4c of the partition wall 4B, and It is formed along the reinforcing rib 4d and is connected to the support portion 4a, the boss portions 4b and 4c, and the reinforcing rib 4d.

  In addition to this, the partition wall 4B is formed above the support portion 4a, and connects the boss portions 4i and 4j into which one end portions of the shifter shafts 37A and 37B are inserted, and the boss portions 4i and 4j and the support portion 4a. And reinforcing ribs 4k.

  As a result, the side edge 31a of the plate member 31 is connected to the support portion 4a, the boss portions 4b, 4c and the reinforcing rib 4d, which are parts of the partition 4B having high rigidity, and the upper portion of the side edge 31a of the plate member 31 is connected to the reinforcing rib. 4k can be connected.

  Therefore, the plate member 31 can be stably attached to the partition wall 4B, and the loads F5 and F6 due to the operation and swinging of the shifter shafts 37A to 37D and the input shaft 8 are highly rigid through the plate member 31. The outer periphery of the transmission case 5, that is, the joints 4 </ b> A and 5 </ b> A of the clutch housing 4 and the transmission case 5 can be dispersed.

  As a result, the catch tank 30 can be prevented from excessively vibrating and deforming due to the operation and swinging of the shifter shafts 37A to 37D and the input shaft 8, and a certain amount of oil O1 can be stored in the catch tank 30, A certain amount of oil O1 can be supplied from the catch tank 30 to the upper oil reservoir 25A. For this reason, the stirring resistance of the counter gear 13 and the final gear 16 can be reduced more effectively.

  Further, according to the transmission 2 of the present embodiment, the upper oil introduction port 30A of the catch tank 30 is connected to the lower oil discharge port 30B by connecting the upper part of the side edge 31a of the plate member 31 to the reinforcing rib 4k. While being able to expand, upper oil inlet 30A can be expanded to the countershaft 9 side, and the capacity of catch tank 30 can be increased.

  For this reason, the oil O1 scraped up by the final gear 16 above the transmission case 5 can be effectively captured by the catch tank 30, and a sufficient amount of oil can be temporarily held in the catch tank 30.

  Accordingly, it is possible to prevent a large amount of oil from being introduced into the catch tank 30 and staying in the upper oil reservoir 25A, and the oil temporarily stored in the catch tank 30 overflows from the catch tank 30 and flows into the upper oil reservoir. Returning to 25A can be prevented. As a result, the stirring resistance of the counter gear 13 and the final gear 16 can be reduced more effectively, and the power loss of the transmission 2 can be reduced more effectively.

  Further, according to the transmission 2 of the present embodiment, the ceiling walls 4C, 5C of the clutch housing 4 and the transmission case 5 are inclined portions 4s, 5a that are inclined obliquely upward from the final gear 16 toward the counter shaft 10. , And curved portions 4t and 5b that curve so as to be directed to the upper oil inlet 30A of the catch tank 30 across the upper portion of the input shaft 8 from the inclined portions 4s and 5a.

  Thereby, the oil O1 scraped upward by the final gear 16 can be reliably guided to the catch tank 30 along the inclined portions 4s, 5a and the curved portions 4t, 5b.

  Further, according to the transmission 2 of the present embodiment, the pair of protrusions 31b and 31c are formed on the peripheral wall 31A of the plate member 31 facing the vertical wall, and the protrusions 31b and 31c are not parallel to the vertical direction. It extends continuously. Thereby, the rigidity of the plate member 31 can be increased and deformation of the catch tank 30 can be suppressed. For this reason, a certain amount of oil stored in the catch tank 30 can be secured. The protrusions 31b and 31c may extend continuously in parallel with the upper direction.

  Further, as shown in FIG. 4, after the oil O3 introduced into the catch tank 30 is brought into contact with the left and right projections 31b, it can be poured downward while being brought into contact with the other projections 31c on the left and right. As a result, the oil O3 can be reliably guided downward along the protrusions 31b and 31c, the oil O3 is prevented from being disturbed inside the catch tank 30, and the oil O3 is collected from the catch tank 30 in the lower oil reservoir. The portion 25B can be reliably supplied.

  Further, according to the transmission 2 of the present embodiment, the recess 4m that swells from the partition 4B toward the clutch mechanism 7 is formed in the region of the partition 4B facing the plate member 31, and the bottom surface of the recess 4m is formed in the recess 4m. The restriction ribs 4n extending horizontally from the plate member 31 toward the plate member 31 were formed.

  Thereby, the catch tank 30 with a large volume can be installed in a limited space of the transmission case 5. Further, when the final gear 16 rotates while the vehicle is tilted, the oil O4 collides with the regulating rib 4n in the catch tank 30 as shown in FIG. It is possible to suppress the return to the upper oil reservoir 25A in a large amount.

  Further, by connecting the support portion 4a, the boss portions 4b and 4c and the reinforcing rib 4d and the recess 4m by the regulating rib 4n, the rigidity of the recess 4m is increased, and the amount of oil stored in the catch tank 30 is reduced. The amount of oil supplied from the catch tank 30 to the lower oil reservoir 25B can be made constant.

  Further, according to the transmission 2 of the present embodiment, the transmission case 5 is provided with the shift and select shaft 39 that is installed at a position overlapping the catch tank 30 in the axial direction of the input shaft 8 and operates the shifter shafts 37A to 37D. A guide case 40 that is rotatably held is provided, and the guide case 40 includes a pedestal portion 40A that is attached to the ceiling wall 5C of the transmission case 5 and an extending wall 40B that extends inward of the transmission case 5. The extension wall 40B is configured to extend from the pedestal portion 40A toward the upper end of the plate member 31, whereby the space above the catch tank 30 is formed by the extension wall 40B and the partition wall 4B.

  As a result, the oil O1 jumping above the catch tank 30 can be guided to the upper oil inlet 30A of the catch tank 30 by the partition wall 4B, the extending wall 40B, and the peripheral wall 5D of the transmission case 5 (see FIG. 6). For this reason, much oil O1 can be guide | induced to the catch tank 30 by rotation of the final gear 16, and it can prevent that excess oil flows into 25 A of upper oil reservoirs. As a result, the stirring resistance of the counter gear 13 and the final gear 16 can be more effectively reduced.

  In addition, according to the transmission 2 of the present embodiment, as shown in FIG. You may let them.

  If it does in this way, it can control that plate member 31 vibrates, and it can control that catch tank 30 changes. As a result, a certain amount of oil can be stored in the catch tank 30 and a certain amount of oil O1 can be supplied from the catch tank 30 to the upper oil reservoir 25A.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Transmission, 4 ... Clutch housing, 4B ... Bulkhead, 4C ... Ceiling wall, 4a ... Supporting part, 4b, 4c ... Boss part (No. 1 boss part), 4d ... reinforcement rib (first reinforcement rib), 4i, 4j ... boss part (second boss part), 4k ... reinforcement rib (second reinforcement rib), 4m ... concave portion, 4n ... regulating rib, 4s ... inclined portion, 4t ... curved portion, 5 ... transmission case, 5C ... ceiling wall, 5a ... inclined portion, 5b. ..Bending part, 6 ... Engine (internal combustion engine), 7 ... Clutch mechanism, 8 ... Input shaft, 9 ... Counter shaft (first counter shaft), 9F ... Final drive gear 10 ... counter shaft (second counter shaft), 11 ... differential device, 12 ... input gear, 13 ... counter gear (first counter gear), 14 ... counter gear ( Second counter gear), 16 ... final gear, 1L, 21R ... drive shaft (differential gear shaft), 23 ... gearbox (space on the upper oil reservoir), 24L, 24R ... drive wheels, 25 ... oil reservoir, 25A ... Upper oil reservoir, 25B ... Lower oil reservoir, 25a ... Oil communication port, 25b ... Oil supply port, 30 ... Catch tank, 30A ... Upper oil inlet, 30B ... Lower oil discharge port, 31 ... plate member, 31A ... peripheral wall, 31a ... side edge, 31b, 31c ... projection, 31d ... upper end, 32 ... space, 33 .. Partition wall, 34, 35 ... meshing clutch, 37A, 37B ... shifter shaft (second shifter shaft), 37C, 37D ... shifter shaft (first shifter shaft), 39 ... shift And select shaft, 40 ... guide case, 40A ... pedestal, 40B ... extension wall, 40b ... lower end

Claims (9)

A transmission case that is coupled to a clutch housing that houses the clutch mechanism so as to face each other with a partition wall interposed therebetween, and that has an oil reservoir for storing oil therein;
An input shaft that is installed inside the transmission case and through which the power of the internal combustion engine is transmitted via the clutch mechanism;
An input gear attached to the input shaft;
A counter shaft that is installed inside the transmission case, meshes with the input gear, and has a counter gear having a lower part immersed in oil and a final drive gear adjacent to the counter gear;
A differential gear shaft that is installed inside the transmission case, has a final gear that meshes with the final drive gear and that has a lower part immersed in oil, and transmits power to the left and right drive wheels;
A catch tank that is installed on the opposite side of the counter shaft with respect to the input shaft and stores oil scraped up by the final gear;
The catch tank has an upper oil introduction port through which oil is introduced and a lower oil discharge port through which oil is discharged, and is configured to extend in the vertical direction along the partition wall,
By providing a partition wall that protrudes below the counter gear and the final gear from the partition wall and extends below the final gear along the lower edge of the counter gear and the final gear from below the catch tank, The oil reservoir is divided into an upper oil reservoir and a lower oil reservoir across the partition wall,
The vehicle transmission, wherein the lower oil reservoir is disposed below the lower oil outlet and communicated with the lower oil outlet and the upper oil reservoir, respectively. The lower oil reservoir portion has a space partitioned from a space on the upper oil reservoir portion side where the counter gear and the final gear are installed below the partition wall,
The lower oil reservoir portion is an oil communication port that communicates with the lower oil discharge port and the upper oil reservoir portion, opens toward the final gear, and supplies oil from the lower oil reservoir portion to the final gear. The vehicle transmission according to claim 1, further comprising a supply port. A meshing clutch for selectively connecting the input gear and the counter gear, and a shifter shaft for operating the meshing clutch,
The partition wall is configured to support the input shaft in a freely rotatable manner, to be formed below the support portion, and to connect the boss portion and the support portion to a boss portion into which an end of the shifter shaft is inserted. Reinforcing ribs to be
The catch tank includes the partition and a plate member that is attached to the partition and forms a space between the partition,
A side edge of the plate member facing the input shaft with respect to a vertical axis is formed along the support portion, the boss portion, and the reinforcing rib, and connected to the support portion, the boss portion, and the reinforcing rib. The vehicle transmission according to claim 1 or 2, wherein the vehicle transmission is provided. The counter shaft has a first counter shaft installed below the input shaft and a second counter shaft installed above the input shaft,
The shifter shaft selectively connects the input gear and the second counter gear to a first shifter shaft that operates a meshing clutch that selectively connects the input gear and the first counter gear. Comprising a second shifter shaft for operating a meshing clutch
The boss portion formed below the support portion is a first boss portion into which an end of the first shift shaft is inserted, and a reinforcing rib that connects the boss portion and the support portion is a first rib. When the first reinforcing portion is used, a second boss portion that is formed above the support portion and into which an end portion of the second shifter shaft is inserted, the second boss portion, and the support portion are provided. Providing a second reinforcing rib for connection;
The vehicular transmission according to claim 3, wherein an upper portion of a side edge of the plate member is connected to the second reinforcing rib.   The transmission case and the ceiling wall of the clutch housing have an inclined portion inclined obliquely upward from the final gear toward the second countershaft, and the catch tank extends from the inclined portion over the input shaft. The vehicle transmission according to any one of claims 1 to 4, further comprising a curved portion that is curved so as to be directed toward the upper oil introduction port.   The pair of protrusions are formed on the peripheral wall of the plate member facing the partition wall, and the protrusions extend continuously or discontinuously parallel to the vertical direction. The vehicle transmission as set forth in claim 1. A recess that swells from the partition toward the clutch mechanism is formed in the partition region facing the plate member,
A restriction rib extending horizontally from the bottom surface of the recess toward the plate member is formed in the recess,
The vehicle transmission according to claim 3, wherein the recess is connected to at least one of the support portion, the first reinforcing rib, and the first boss portion by the restriction rib. The transmission case is provided at a position overlapping the catch tank in the axial direction of the input shaft, and a guide case for rotatably holding a shift-and-select shaft for operating the shifter shaft is provided,
The guide case includes a pedestal portion attached to a ceiling wall of the transmission case, and an extending wall extending inward of the transmission case,
8. The space above the catch tank is formed by the extension wall and the partition wall by extending the extension wall from the pedestal portion toward the upper end of the plate member. The vehicle transmission according to any one of the above. The vehicle transmission according to claim 8, wherein a lower end portion of the extension wall is extended downward from an upper end of the plate member and is in contact with an upper portion of the plate member.

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