JPH0389062A - Trans-axle lubricating device - Google Patents

Abstract

PURPOSE:To feed lubricating oil to a power distributing part positively even in case of lubricating the whole trans-axle with the same lubricating oil by providing a lubricating oil guiding passage, for inducing the lubricating oil to a power distributing part by the rotation of the terminal reduction driven gear of a terminal reduction gear mechanism, at a case between a differential part and the power distributing part. CONSTITUTION:When a terminal reduction driven gear 64 is rotated, lubricating oil is fed to a lubricating oil guiding passage 108 provided at a case between a differential part and a power distributing part 28 by the rotation of the terminal reduction driven gear 64, and the lubricating oil is positively fed from the lubricating oil guiding passage 108 to the power distributing part 28. The lubrication of the power distributing part 28 can be thereby performed sufficiently.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transaxle lubrication device, and particularly to a transaxle lubrication device that actively supplies lubricating oil from a differential portion to a power distribution portion to sufficiently lubricate the power distribution portion. The present invention relates to a transaxle lubrication device that can be used for.

[Conventional technology]

Vehicles are equipped with a transaxle to convert and extract the driving force generated by an internal combustion engine mounted as a prime mover according to driving conditions.

This transaxle is provided with a transmission section connected to the internal combustion engine, a differential section connected to this transmission section via a final reduction gear mechanism, and a power distribution section (transfer) connected to this differential section. There are things that exist. The transmission section has a multi-stage gear train, and the differential section is connected to the wheel axle. Furthermore,
The power distribution section also serves as a driving force direction changing mechanism,
Two-wheel drive (2WD) for four-wheel drive vehicles (4WD vehicles)
There is a switching mechanism that switches between 4WD and 4WD.

The structure of a transaxle for a four-wheel drive vehicle is disclosed, for example, in Japanese Utility Model Application Publication No. 55-170129.

The system described in this publication uses the rotation inside the differential case, which rotates around an axis extending in the lateral direction of the vehicle body, to drive the left and right front wheels via a group of differential bevel gears housed inside the differential case. The first gear transmits power to the axle side and rotates as a unit with the rotation of the differential case.
By meshing a bevel gear with a second bevel gear that is rotatable about an axis extending in the longitudinal direction of the vehicle body, the power is transmitted to the propeller shaft that drives the left and right rear wheels. A clutch member is provided that operates to transmit or not transmit the rotation of the differential case to the propeller shaft.

In addition, as a lubricating device for a transaxle, for example,
Japanese Unexamined Patent Publication No. 60-84470, Publication No. 63-3245
It is disclosed in Publication No. 5. The device described in Japanese Unexamined Patent Publication No. 60-84470 provides a baffle plate surrounding the outer periphery of the reduction gear at the bottom of the reduction gear, and allows the oil scraped up by the reduction gear to flow from the bottom of the gear transmission mechanism to the bottom of the differential gear. The amount of oil flowing from the lower part of the differential gear to the lower part of the gear transmission mechanism by the final drive gear is constantly supplemented to prevent the oil level in the lower part of the differential gear from decreasing and the differential gear becoming insufficiently lubricated. Also, Jikko Sho 63-3245
The device described in Japanese Patent No. 5 effectively lubricates the bearing and oil seal that support the drive pinion shaft of the differential portion.

[Problem that the invention seeks to solve]

However, in a transaxle, when the transmission section, differential section, and power distribution section are lubricated with the same lubricant, when the vehicle is stationary, the lubricant level is lower than the drive pinion shaft, as shown in Figure 2. 70, but as the vehicle speed increases, the final deceleration driven gear 64
The rotation of the final reduction driven gear 64 causes a large amount of lubricating oil to flow toward the transmission section 22 (see Fig. 1), and as a result, the power distribution section 28 is not sufficiently lubricated. There was an inconvenience that it would not be possible.

In addition, in order to solve this problem, if the power distribution part is lubricated with other lubricating oil, parts such as oil seals and breathers are required, which increases the number of parts and complicates the configuration. There are disadvantages in that the adhesion property decreases and the price increases.

[Purpose of the invention]

Therefore, the purpose of this invention is to eliminate the above-mentioned disadvantages.
When lubricating the transaxle with the same lubricating oil, by actively supplying the lubricating oil to the power distribution section through the rotation of the final reduction driven gear of the final reduction gear mechanism,
It is an object of the present invention to realize a transaxle lubrication device that sufficiently lubricates a power distribution part, has a simplified structure, has good assembly properties, and can be inexpensive.

[Means for solving problems]

In order to achieve this object, the present invention provides the same lubrication for a transmission section connected to an internal combustion engine, a differential section connected to this transmission section via a final reduction gear mechanism, and a power distribution section connected to this differential section. In a transaxle lubricating device that performs lubrication with oil, a lubricating oil guide passage that guides the lubricating oil to the power distribution section by rotation of the final reduction driven gear of the final reduction gear mechanism is connected to the differential section and the power distribution section. It is characterized by being installed in the case between.

[Effect]

According to the configuration of the present invention, when the final reduction driven gear rotates, lubricating oil is supplied to the lubricating oil guide passage provided in the case between the differential section and the power distribution section, and lubrication is caused by the rotation of the final reduction driven gear. Lubricating oil is actively supplied from the oil guide passage to the power distribution section, thereby making it possible to sufficiently lubricate the power distribution section.

〔Example〕

Embodiments of the present invention will be described in detail and specifically below based on the drawings.

1 to 5 show embodiments of this invention. In FIG. 5, 2 is a four-wheel drive vehicle (4WD vehicle), 4 is an internal combustion engine installed horizontally in the front part of this four-wheel drive vehicle 2,
6 is a transaxle connected to this internal combustion engine 4;
8 is a front wheel, 10 and 10 are a front axle, 12 is a rear differential section, 14 is a propulsion shaft that connects the transaxle 6 and the rear differential section 12, 16 and 16 are rear wheels, and 18 and 18 are This is the rear axle.

The transaxle 6 includes, within the transaxle case 20, a transmission section 22 directly connected to the internal combustion engine 4, a front differential section 26 connected to the transmission section 22 by a final reduction gear mechanism 24, and a front differential section 26 separated from the transmission section 22. A power distribution section (transfer) 28 connected to the front differential section 26 of the lever
and a two-wheel drive (2WD) connected to this power distribution section 28.
and a four-wheel drive (4WD) switching mechanism 30.

In FIG. 1, inside the transaxle case 20, a main shaft 32 communicating with an input shaft (not shown) for inputting power from the internal combustion engine 4 side, and a counter shaft 34 are arranged in the longitudinal direction of the transaxle 6. and held parallel.

The main shaft 32 is rotatably supported by a light case 20 - 1 of the transaxle case 20 and a left case 20 - 2 of the transaxle case 20 .

The counter shaft 34 is rotatably supported by the right case 20-■ and the left case 20-2.

The main shaft 32 has main shafts sequentially starting from the internal combustion engine 4 side.
The speed gear 3G, the main reverse gear 38, and the main 2nd speed gear 40 are fixedly provided, and the main 3rd speed gear 42, the main 4th speed gear 44, and the main A fifth speed gear 46 is rotatably provided.

A final reduction drive gear 48 constituting the P: reduction gear mechanism 24 is fixed to the counter shaft 34 sequentially from the internal combustion engine 4 side, and a counter 1 speed gear 50 and a main 2 A counter second speed gear 52 with which the speed gear 40 meshes is rotatably provided, and a main 3
The counter 3rd speed gear 54 and the main 4 are meshed with the speed gear 42.
A counter 4th speed gear 56 that meshes with the speed gear 44 and a counter 5th speed gear 58 are fixedly provided within the side case 20-3. This counter 5th speed gear 58 meshes with the main 5th speed gear 46.

The final reduction drive gear 48 meshes with a large diameter final reduction driven gear 64 fixed to the differential housing 60 of the front differential section 26 with mounting bolts 62. Therefore, the final reduction gear mechanism 24 includes the final reduction drive gear 48 and the final reduction driven gear 64.

Further, a transfer bevel gear 66 is fixed to the differential housing 60 by a mounting bolt 62.

The front differential section 26 is connected to the right front axle 10 and the left front axle 10, and is connected to the light case 20-1.
and a front transfer case 68.

The transfer bevel gear 66 includes the main shaft 3
2 and a transfer bevel pinion gear 72 provided on a drive pinion shaft 70 disposed substantially perpendicular to the counter shaft 34 are in mesh with each other.

As shown in FIG. 3, the drive pinion shaft 70 has first and second front pinion bearings 74 disposed with the transfer bevel pinion gear 72 side having a gap S of a predetermined distance W.
．． 76, and the rear end side is supported by a rear side pinion bearing 78.

A transfer drive gear 80 is fixed to the drive pinion shaft 70 between the second front pinion bearing 76 and the rear pinion bearing 78.

The transfer drive gear 80 meshes with a transfer driven gear 84 fixed to a transfer shaft 82 arranged substantially parallel to the drive pinion shaft 70 . The transfer shaft 82 is supported by first and second transfer bearings 86 and 88 held by the front transfer case 68.

Further, the transfer shaft 82 is connected to the output shaft 90 via the switching mechanism 30 that switches the four-wheel drive vehicle 2 between two-wheel drive (2WD) and four-wheel drive (4WD).

The power distribution section 28 is enclosed by a front transfer case 68 and a rear transfer case 92.

In the switching mechanism 30, a switching fork 96 that is moved by the operation of a switching shaft 94 slides a switching sleeve 98, thereby transmitting power to the output shaft 90 to achieve four-wheel drive, and also transmits power to the output shaft 90. It is designed to provide two-wheel drive by cutting the

This switching mechanism 30 and output shaft 90 are held by a rear transfer case 92 and an output case 100. The output shaft 90 is supported by first and second output bearings 102 and 104 held by the output side case 100.

A companion flange 106 connected to the propulsion shaft 14 is splined to the output shaft 90 .

The lubricating oil in the front differential section 26 is transferred to the front transfer case 68, which is a case between the front differential section 26 and the power distribution section 28, by the rotation of the final reduction driven gear 64. A lubricating oil guide passage 108 is formed to guide the lubricating oil into the gap S between the second pinion bearings 74 and 76.

This lubricating oil guide passage 108 is, as shown in Fig. 3.4,
A first lubricating oil passage 108-4 formed in the holding portion 112 of the front transfer case 68 communicates with the differential space 110 formed by the front transfer case 68, and a first lubricating oil passage 108-1 that communicates with the first lubricating oil passage 108-1. A second lubricating oil passage 108-2 is formed in a retainer 114 provided to support the first and second front side binion bearings 74, 76. This second lubricating oil passage 108-2 communicates with the gap S between the first and second front binion bearings 74,76.

In addition, the passage forming side inner surface 6 of the front transfer case 68
8a is formed smoothly to facilitate the flow of lubricating oil along the rotational direction of the final reduction driven gear 64, as shown in FIG.

In the transaxle 6, the transmission section 22, front differential section 26, and power distribution section 28 are lubricated by the same lubricating oil.

On the other hand, a shift and select shaft 118 is assembled in the transaxle case 20, which is moved in the axial direction when selecting and rotated around the axis when shifting, in the shift operation section 116 shown in FIG. There is. One end of the shift and select shaft 118 is supported by a shaft holding portion 120 connected to the transaxle case 20, and the other end is connected to a control shaft (not shown). That is, when the driver operates a shift lever (not shown) in the select direction, the shift and select shaft 118 is moved in the axial direction by the movement of the control shaft. When activated, the control shaft moves and rotates around the shaft.

A shift and select lever 122 is provided on this shift and select shaft 118.

This shift and select lever 122 is connected to a 1st and 2nd speed shift yoke 126 connected to a 1st and 2nd speed shift shaft 124 that is a low speed shift shaft and a high speed shift shaft by moving the shift and select shaft 118 in the axial direction. 3rd/4th speed shift yoke 130 connected to 3rd/4th speed shift shaft 128
and a 5th speed/reverse shift yoke 134 connected to the 5th speed/reverse shift shaft 132.

In addition, the 5th speed reverse shift shaft 132 is parallel to the 5th speed reverse shift shaft 132.
A reverse guide shaft 136 is provided.

Further, the first and second speed shift shafts 124 are provided with first and second speed forks 138, and the third and fourth speed shift shafts 128 are provided with third and fourth speed forks 140.

Further, the 5th speed/reverse shift shaft 132 is provided with a 5th speed fork 142.

The shift and select shaft 118 also includes an ink lock mechanism 146 having an interlock plate 144.
is provided.

Next, the operation of this embodiment will be explained.

The driving force of the internal combustion engine 4 is transmitted from the main shaft 32 and counter shaft 34 of the transmission section 22 to the front differential section 26 via the final reduction gear mechanism 24, and is transmitted to the front right axle 10 and the left front axle 1.
0 and is also transmitted to the power distribution section 28.

When the switching mechanism 30 is operated to put the four-wheel drive vehicle 2 into four-wheel drive (4WD), the driving force is transferred to the transfer shaft 8.
2 and the output shaft 90, the output shaft 90,
It reaches the rear differential section 12 via the propulsion shaft 14 and connects the rear wheels 16.
・Transmitted to 16.

By the way, as the vehicle speed increases, the final reduction driven gear 64 rotates faster in the direction of arrow A in FIG.
The rotation of the final reduction driven gear 64 scrapes up the lubricating oil in the differential chamber 110 and is actively sent to the lubricating oil guide passage 108 from the smoothly formed passage forming side inner surface 68a of the front transfer case 68. Ru. This lubricating oil is applied to the first and second front pinion bearings 74 and 76 that support the drive pinion shaft 70 of the power distribution section 28.
It is supplied to the gap S.

As a result, the power distribution section 28 is sufficiently lubricated by the lubricating oil from the lubricating oil guide passage 108, and the functions of each section can be maintained well.

Additionally, since there is no need to separately supply lubricating oil to the power distribution section 28, parts such as oil seals and breathers are not required, reducing the number of parts, simplifying the configuration, and improving ease of assembly. In addition, it can be made inexpensive.

〔Effect of the invention〕

As is clear from the above detailed description, according to the present invention,
By providing a lubricating oil guide passage in the case between the differential section and the power distribution section that guides lubricating oil to the power distribution section by the rotation of the final reduction driven gear of the final reduction gear mechanism, the entire transaxle can be coated with the same lubricant. Even when lubrication is applied, lubricating oil can be actively supplied to the power distribution section to ensure sufficient lubrication of the power distribution section.

Further, since there is no need to lubricate the power distribution section with other lubricating oil, parts such as oil seals and breathers are not required, and the structure can be simplified, easy to assemble, and inexpensive.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention, FIG. 1 is a schematic sectional view of a transaxle, FIG. 2 is a side view of the transaxle, FIG. 3 is an enlarged view of FIG. Figure 4 is an explanatory diagram of the lubricating oil guide passage formed in the power distribution section, Figure 5
The figure is a schematic explanatory diagram of the vehicle. In the figure, 2 is a four-wheel drive vehicle, 4 is an internal combustion engine, 6 is a transaxle, 20 is a transaxle case, 22 is a transmission section, 24 is a final reduction gear mechanism, 26 is a front differential section, 2
8 is a power distribution unit, 30 is a switching mechanism, 32 is a main shaft, 3
4 is a counter shaft, 48 is a final reduction drive gear, 64 is a final reduction drive gear, 68 is a front transfer case, 7
0 is the drive pinion axis, 82 is the transfer axis, lO
8 is a lubricating oil guide passage, 110 is between differential chambers, and 11
4 is a retainer.

Claims (1)

[Claims] 1. Transaxle lubrication in which the transmission section connected to the internal combustion engine, the differential section connected to this transmission section via a final reduction gear mechanism, and the power distribution section connected to this differential section are lubricated with the same lubricant. The apparatus is characterized in that a lubricating oil guide passage for guiding the lubricating oil to the power distribution part by rotation of the final reduction driven gear of the final reduction gear mechanism is provided in the case between the differential part and the power distribution part. Transaxle lubrication system.