JPS5891964A - Introduction devie of lubricating oil in power transmission gear for car - Google Patents

Abstract

PURPOSE:To obtain the smooth lubrication by introducing lubricating oil to a bearing of a drive pinion shaft via an oil receiver fixed on the backside of a partition wall and further to a shaft-support part of a speed-change gear on a counter shaft. CONSTITUTION:In the back of a partition 21a, a lubricating-oil introduction device 60 is provided to guide lubricating oil to a top bearing Bg of a counter shaft 33, the fifth speed gear 33h, a synchronizer 33e, and both bearings 43 and 44 of a drive pinion shaft 41. The introduction device 60 consists of an oil receiver 62 fixed on the backside of the partition wall 21a and a connection passage 66 connected into this oil receiver 62. Meanwhile, this connection passage 66 consists of a hole 65 axially provided on the partition wall 21a at the outer end, a side hole 63 opened to a boss part inner hole 67 and a hollow space 53 between both bearings 43 and 44 on the inner end, and an axial oil hole 68a and a radial oil hole 68b of the counter shaft 33.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a warm oil induction device for a vehicle power transmission device,
In particular, a drive pinion shaft is mounted on a front bearing and a rear bearing at the upper part of a partition provided at the front inside a casing that houses a gear transmission, and the pinion of the drive pinion shaft is mounted in a front chamber partitioned by the partition. A ring gear that meshes with the differential gear unit is disposed, and an output shaft and a countershaft of the gear transmission are disposed in a rear chamber partitioned by the partition wall, and a boss portion that pivotally supports an end of the countershaft is disposed in the rear chamber partitioned by the partition wall. The present invention relates to a lubricating oil guide device suitable for use in a vehicular power transmission device provided on a partition wall.

In the vehicle power transmission device of the above type, as described in (2) above, the drive pinion shaft is mounted on the upper part of the bulkhead by a front bearing and a rear bearing, and the front bearing supports the ring gear and the differential gear unit. It is directly exposed to the front chamber where it is housed, and the rear bearing is not directly exposed to the front chamber. Therefore, in this type of vehicle power transmission device, the rear bearing is not sufficiently warmed by the lubricating oil stirring action of the ring gear.

Further, in the above-mentioned type of vehicle power transmission device, a transmission gear is rotatably assembled on the countershaft, and a disconnection device such as a synchronizer device for selectively connecting the transmission gear to the countershaft is spline-coupled. In some cases, this is done by stirring lubricating oil between the transmission gear and the countershaft, between the transmission gear and the disconnection device, and between the disconnection device and the countershaft, but if the transmission gear rotates integrally with the countershaft via the disconnection device. If the inflow of lubricating oil into the contact portions of the transmission gear, countershaft, and disconnection device becomes extremely poor, (3) the lubricating oil adhering to the gears will gradually scatter outward due to centrifugal force. Therefore, if this state continues for a long time, the above-mentioned parts will not be properly lubricated, and fretting wear will occur on the contact surfaces between the respective members due to micro-motion friction.

The present invention is intended to deal with such problems, and its main purpose is to provide a power transmission device having the above configuration, in which lubricating oil scraped up by the speed change gear provided on the output shaft and the counter shaft is transferred to both the drive pinion shaft and the drive pinion shaft. It is an object of the present invention to provide a hot oil induction device having a structure as simple as possible, which can supply oil between bearings and also smoothly supply it to a shaft portion of a transmission gear on a countershaft.

An embodiment thereof will be described below based on the drawings.

FIG. 1 shows the front part of an automobile 10 equipped with a power transmission device according to the present invention, and a casing 20 for accommodating the power transmission device is shown at the lower rear end of an engine 11 mounted on this automobile 10. The shift device 14 shown in FIG.
4b and a shift fork (not shown).

As shown in FIGS. 1 and 2, the casing 20 includes a transaxle case 21. It includes a transmission case 22 and an intermediate plate 2-3. The transaxle case 21 houses the clutch device 12 in its upper part, and houses the final drive kit 40 and the differential gear unit 13 in its lower part, and has a cover 24 fixed to its front end. The transmission case 22 is fixed to the rear end of the transaxle case 21 via an intermediary plate 23, and a gear transmission 3o connected to the clutch device 12 and the final drive kit 40 is housed inside the transmission case 22. Note that an extension housing 25 is fixed to the rear end of the transmission case 22.

The gear transmission 30 includes an idler shaft 31 disposed below a clutch shaft 12a which is the output (5) shaft of the clutch device 12, an output shaft 32 disposed below the idler shaft 31, and a side of the output shaft 32. A counter shaft 33 is arranged parallel to the output shaft 32 at approximately the same ground clearance.
(However, in FIG. 2, it is shown below the output shaft 32 for the sake of illustrating the meshing state of each transmission gear.) In addition, clutch shaft 1
2a is rotatably supported by an intermittent plate 23 and a transmission case 22 via a pair of bearings B and B2. The idler shaft 31 has an intermittent plate 23 and a transmission case 22, a pair of bearings B, and B4. A driving gear 12b, which is integral with the clutch shaft 12a, is always engaged from above with an idler gear 31a integrally formed on the outer periphery of the idler gear 31a. Further, a reverse driving gear 31b and an idler gear 31a (6) are integrally formed on this idler shaft 31.

The output shaft 32 is rotatably supported by the intermediate plate 23 and the transmission case 22 via a pair of bearings B and B6, and its tip is connected to the drive pinion shaft of the final drive kit 40 via a spline joint 49. 41. Further, on the output shaft 32, a first speed gear 328 to a fourth speed gear 32d are rotatably assembled, and synchronizer devices 32e, 32f and a fifth speed gear 32h are spline-coupled.

Note that the fourth speed gear 32d is always meshed with the idler gear 31a from below. Further, a reverse gear 32g that selectively meshes with the reverse driving gear 31b is integrally formed on the outer periphery of the sleeve of the synchronizer device 32f via a reverse idler gear (not shown).

The countershaft 33 has a pair of bearings B on the intermediate plate 23 and the transmission case 22.
7. It is rotatably supported by a shaft (7) via a BJI, and its tip is rotatably supported by a boss part 21C of the transaxle case 21 via a bearing B, and the above-mentioned output shaft is attached to its outer periphery. 32 first speed gear 338 to fourth speed gear 33d that are always in mesh with the first speed gear 32a to fourth speed gear 32d are integrally formed. Further, on this countershaft 33, a fifth speed gear 33h, which is always in mesh with the fifth speed gear 32h of the output shaft 32, is rotatably assembled, and a synchronizer device 33e is spline-coupled.

The final drive kit 40 includes a drive pinion shaft 41 having a pinion 41a and a ring gear 42 disposed in front of the drive pinion shaft 41, and connects the output shaft 32 of the gear transmission 30 and the differential gear unit 13 to enable power transmission. ing.

The drive pinion shaft 41 is arranged in the longitudinal direction of the vehicle body, and is provided on a partition wall 21a provided in the transaxle case 21.
It is rotatably supported at the upper part by a pair of front and rear conical roller bearings (8) 43,44. As shown in FIG. 5, the ring gear 42 is fixed to the case 13a of the differential gear unit 13 on the right side of the drive pinion shaft 41 in the forward direction of the vehicle with bolts 45, and the drive pinion shaft 42 is fixed to the case 13a of the differential gear unit 13 at the rear end thereof. It meshes with a pinion 41a provided at the tip of the shaft 41.

Note that, below the partition wall 21a, there is a communication hole 21 that communicates the front chamber R1 and the rear chamber R2, which are separated by the partition wall 21a.
b is provided, and the casing 2 is passed through this communication hole 21b.
The required amount of lubricating oil stored at the bottom of the tank flows. (In FIG. 2 and FIG. 3, the liquid level of the lubricating oil at rest and during operation is shown by a dashed line and a dashed double dotted line.) As shown in FIG. 6, lubricating oil is guided to the rear part of the partition wall 21a to the tip bearing B of the counter shaft 33, the fifth gear 33h, the synchronizer device 33e, and both bearings 43 and 44 of the drive pinion shaft 41. Lubricating oil guide device 60
(9) is provided. The guiding device 60 includes an oil receiver 62 fixed to the rear surface of the partition wall 21a, and a communication passage 6 communicating with the oil receiver 62.
6. The oil/L462 has a bulge 7) portion 62a with a cross-section shaped like a letter 7 which comes into contact with the rear surface of the partition wall 21a via a sealing rubber band 64 (which may be provided as necessary) to form an oil reservoir, and a pocket 7) in this pocket portion 62a. It has a receiving part 62b having a U-shaped cross section formed by fixing a bottom wall 62C that slopes toward the part 62a, and the right side wall of the receiving part 62b projects upward to form a weir 62d. The pocket portion 62a has an arcuate portion 62e that covers the lower rear portion of the bearing 44, and a weir 62f is provided at the center of this arcuate portion 626. Note that the weir 62f is formed high enough not to come into contact with the drive pinion shaft 41, and the arc portion 62
Sufficient lubricating oil is stored in the center of e so that the lower part of the rear bearing 44 is immersed. The communication path 66 has a horizontal hole 63 that opens into an axial hole 65 provided in the partition wall 21a and a boss inner hole 67 at an outer end, and opens into a space 53 between both bearings 43, 44 at an inner end.
Force (10) that opens into the boss inner hole 67 at the tip Axial oil hole 68a provided at the axis of the undershaft 33
A radial oil hole 68b is provided which opens into the oil hole 68a at the inner end and into an oil groove 68c provided on the outer periphery of the countershaft 33 at the outer end.

Further, in this embodiment, above the right side of the partition wall 21a,
Lubricating oil guide means 5 for guiding lubricating oil to both bearings 43 and 44
0 is set. The guiding means 50 has an axial hole 51 that opens at its tip into the front chamber R housing the differential gear unit 13 and the ring gear 42, and communicates with this hole 51 at its outer end and both bearings 43 at its inner end. .44 and a horizontal hole 52 communicating with a space 53 between the holes.

Note that the horizontal hole 52 is bored together with the horizontal hole 63, and its outer end is closed with a plug 59.

In this embodiment configured as described above, when the clutch shaft 12a is rotated by the engine 11 when the gear transmission 30 is in the neutral state, the driving gear 12b, the idler gear 31a, the fourth gear 32d of the output shaft, and the clutch shaft 12a are rotated by the engine 11. 4th countershaft
Power is transmitted to the countershaft 33 via the speed gear 33d, and the countershaft 33 rotates to shift to the first speed gear 3.
1st speed gear 323 to 3rd speed gear 32C of output shaft 32 that are always meshed with 3a to 3rd speed gear 33c
At the same time, the synchronizer device 33e is rotated. At this time, the fifth speed gear 33h is stationary on the countershaft 33. As a result, in the transmission case 22, the first gear 328 to fourth gear 32d of the output shaft 32 and the first gear 338 to fourth gear 3 of the counter shaft 33 are
3d scrapes up the lubricating oil stored in the casing 20, and the scraped up lubricating oil scatters and cleans the bearing exposed in the transmission case 22 and each gear in the case 22. Further, in the chamber R2 at the rear of the transaxle case 21, a synchronizer device 336 scrapes up the lubricating oil in the casing 20. This scraped up lubricating oil is deposited on the earthen wall of the axle case 21 or in the oil pan 6.
The water hits the weir 62d of No. 2 and flows down into the receiving part 62b on the bottom wall 62c.
It flows into the pocket portion 62B along the direction.

This lubricating oil is applied to the hole 65 of the partition wall 21a. It passes through the outer end of the horizontal hole 63, the boss inner hole 67, passes through the bearing B, and flows back into the rear chamber R2. The oil flows through the hole 68b to the oil groove 68C, and is connected to the countershaft 33 and the fifth gear 3.
3 hours and between the counter shaft 33 and the synchronizer device 336, and then flows back into the rear chamber R section. Also,
The lubricating oil that has flowed into the pocket portion 2a flows into the cavity 53 through the hole 65 and the horizontal hole 63 of the partition wall 21a, and flows along the pocket portion 62a to the center of the circular arc portion 62e. Note that at this time, since the drive pinion shaft 41 is not rotating, the lubricating oil that has flowed into the cavity 53 mainly flows forward, passing through the bearing 43 and flowing down into the front chamber R2, while flowing into the pocket portion 62a. Along the arc portion 62e
The lubricating oil that flowed to the center of the
It flows inwards.

Furthermore, when the gear transmission device 30 is in the forward (13) forward (13) state of the first to fourth speeds, the synchronizer device 32e or 32f is operated and the power transmitted to the counter shaft 33 is transmitted to the output shaft 32, so that the drive The pinion shaft 41 rotates and the ring gear 42 rotates counterclockwise in the drawing.

As a result, the power is transferred to the differential gear unit) 13
is transmitted to the front axle 15 via. At this time, the rotation of the output shaft 32 causes the fifth speed gear 32h to shift.
rotates and causes the fifth speed gear 33h on the counter shaft 33 to rotate freely, so that the lubricating oil in the rear chamber R2 is also scraped up by the fifth speed gear 33h. Therefore, a large amount of lubricating oil is poured into the oil receiver 62 compared to the neutral state described above.
flow inside. This lubricating oil flows in the same way as in the neutral state described above, and properly warms the bearing B of the countershaft, between the countershaft 33 and the fifth gear 33h, and between the countershaft 33 and the synchronizer device 33e, and also heats the drive pinion. Both the front and rear bearings 43 and 4481 of the shaft 41 slide. Also, at this time, the lubricating oil in the front chamber R1 is scraped up by the counterclockwise rotation (14) of the ring gear 42, and a part of this lubricating oil is directly transferred to the front bearing 43.
When it adheres to '-, it flows into the cavity 53 through the hole 51 and the lateral hole 52 of the guiding means 50. As a result, in this case, lubricating oil is supplied from the guiding device 60 and the guiding means 50 to both bearings 4 to 3, 44 of the drive pinion shaft 41.
The amount of lubricating oil required during high-speed rotation is ensured.

Furthermore, when the gear transmission 30 is in the forward state of the fifth speed, the synchronizer device 336 is operated and the power transmitted to the countershaft 33 is transferred to the fifth speed of the countershaft.
is transmitted to the output shaft 32 via the speed gear 33h and the fifth speed gear 32h of the output shaft 32,
It is transmitted to the front axle 15 via the final drive kit 40 and the differential Luga unit 13. At this time, the synchronizer device 33e and the fifth gear 33
h is a minute displacement on the countershaft 33 (i.e.
The lubricating oil, which is attached to the parts that need to be flushed, flows outward one by one and scatters due to centrifugal force. In this embodiment, lubricating oil flows into the boss inner hole 67 in this case as well, and this lubricating oil passes through the axial oil hole 68a, the radial oil hole 68b, and the oil groove 68C to the countershaft 33. It flows out to the outer periphery of the body and flows into areas that require lubrication. This prevents frictional contact and contact surfaces (for example, the outer circumferential surface of the counter shaft 33 and the inner circumferential surface of the fifth gear 33h or the fifth
Front end thrust surface of high gear 33h and synchronizer device 3
Fatigue wear (rear thrust surface of the hub at 36)
In other words, the occurrence of fretting wear is prevented.

Furthermore, in this embodiment, even when parking, the weir 6
Lubricating oil" is stored in the center of the circular arc portion 626 having a diameter of 2f, and the lower part of the rear bearing 44 is immersed in the lubricating oil. Therefore, even when the vehicle starts (at the beginning of rotation of the drive pinion shaft 41), the rear bearing 44 This means that lubricating oil is immediately supplied to the tank, preventing problems caused by insufficient hot water.

It should be noted that the operation when the gear transmission fi30 is in the reverse drive state is likely to be easily understood from the above description of each operation, so the explanation thereof will be omitted.

As described in detail above, in the present invention, as exemplified in the above embodiment, the oil passage (
Horizontal hole 63. A receiving portion having a hole 65) opened on the rear surface of the partition wall 21a, receiving the lubricating oil scooped up by the speed change gears 32h and 33h provided on the output shaft 32 and the counter shaft 33, and causing the lubricating oil to flow into the opening of the oil passage. 62b and a weir 6 forming an oil sump at the rear lower part of the rear bearing 44.
An oil receiver 62 having a pocket portion 62a having a diameter of 2f is attached to the rear surface of the partition wall 21'a, and the oil passage is connected to the boss portion 2.
A second oil passage (oil hole 68
The structure is characterized by the provision of oil grooves 68a, 68b, and 68c). Thus, according to the present invention, when the power transmission device having the above configuration is operated, the lubricating oil that is scooped up by the speed change gear in the rear chamber partitioned by the partition wall is supplied between both bearings of the drive pinion shaft.
), it is possible to sufficiently lubricate both bearings, and it is also possible to supply synchronized lubricating oil to the shaft portion of the transmission gear on the countershaft through the second oil passage to sufficiently lubricate the shaft portion. Furthermore, when the vehicle is parked, the lower part of the rear bearing is immersed in the lubricating oil stored in the pocket of the oil receiver, so the rear bearing is sufficiently lubricated even when the vehicle is started (at the beginning of rotation of the drive pinion shaft). be able to.

[Brief explanation of the drawing]

Fig. 1 is a schematic front side view of an automobile equipped with a power transmission device according to the present invention, Fig. 2 is an enlarged configuration diagram of the inside of the casing shown in Fig. 1, and Fig. 3 is an oil receiver installed. FIG. 4 is a perspective view of the oil receiver, FIG. 5 is a sectional view taken along line V-V in FIG. 3, and FIG. FIG. 3 is a cross-sectional view taken along line VI. Explanation of symbols: 20...Casing, 21a...Partition wall, 21(
18) C... Boss part, 30... Gear transmission, 32...
Output shaft, 32h... 5th speed gear assembled to the output shaft, 33... Counter shaft, 33e... Synchronizer device assembled to the counter shaft, 33h... Assembled to the counter shaft. 5th gear, 41...drive pinion shaft,
41a...pinion, 42...ring gear, 15.
...Differential middle Luga Unisoto, 43...Front bearing, 44...Rear bearing, 60...Lubricating oil guide device, 62...Oil receiver, 62a...Pocket part, 62
b...Receiving part, 62f...Weir, 63...Horizontal hole, 65
...hole, 67...boss inner hole, 68a, 68b...
・Oil hole, 68...Oil groove. Applicant Toyota Motor Corporation Representative Patent Attorney Teru Hase − (19)

Claims (1)

[Claims] A drive pinion shaft is supported by a pair of front bearings and a rear bearing at the upper part of a partition wall provided at the front inside of a casing that houses a gear transmission, and the drive pinion shaft is mounted in a front chamber partitioned by the partition wall. A ring gear meshing with a pinion of a drive pinion shaft is arranged together with a differential gear unit, while an output shaft and a countershaft of the gear transmission are arranged in a rear chamber partitioned by the partition wall, and an end of the countershaft is arranged as a shaft. A supporting boss portion is placed on the vehicle power transmission device provided on the bulkhead, and an oil passage communicating between the two bearings is opened on the rear surface of the bulkhead and is provided on the output shaft and the countershaft. An oil receiver comprising: (1) a receiving part for stopping lubricating oil scooped up by a transmission gear and allowing it to flow into the oil opening; and a pocket part having (1) a weir for forming an oil sump at the rear lower part of the rear bearing; is attached to the rear surface of the partition wall, and further includes a second oil passage that communicates the oil passage with the shaft support of the transmission gear on the countershaft through the inner hole of the boss portion. .