JPS63195470A - Lubricating device for bearing of output shaft in power transmitting device for vehicle - Google Patents

Abstract

PURPOSE:To promote the improvement of durability of a bearing member, by providing a lubricating oil hole, which supplies lubricating oil to the bearing member supporting an output shaft in the point end part of an extension housing. CONSTITUTION:A pump 126 is driven by a ring gear mounting member 62 forcing oil in the lower bottom part of transfer cases 72, 74 to be press fed to a lubricating oil hole 124 of an extension housing 114 via a passage 118 and oil holes 120, 122, and the oil is supplied from an end part 124b to a bush 110 lubricating and cooling same. Thereafter, the oil is allowed to flow in the extension housing 114 reaching a tapered roller bearing 104 and lubricating it to be cooled, and then the oil, which is allowed to flow into the transfer cases 72, 74, is recirculated to the oil pump 126. In this way, the lubricating oil can be sufficiently supplied to a bearing member in the point end of the extension housing, thus durability of the bearing member can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a lubricating device for a bearing of an output shaft of a transfer device used in a vehicle such as an automobile.

2. Description of the Related Art The output shaft of a power transmission device such as a transfer device used for four-wheel drive in vehicles such as automobiles is generally rotatably supported at its tip by a bearing member such as a bushing from an extension housing. This type of vehicle power transmission device is disclosed, for example, in Japanese Patent Laid-Open No. 18656/1983.

Problems to be Solved by the Invention The output shaft of a power transmission device has its tip end rotatably supported by a bearing member such as a bushing from an extension housing, but this bearing member is located far away from a transfer case. Therefore, it is difficult for lubricating oil to be supplied to this bearing member, and there is a possibility that the durability of the bearing member may be reduced due to the lack of lubricating oil.

It is an object of the present invention to provide an improved lubricating device that solves the above-mentioned problems.

Means for Solving the Problems According to the present invention, in a lubricating device for a bearing of an output shaft of a vehicle power transmission device, a lubricating oil hole is provided in an extension housing, and the lubricating oil hole is provided in the extension housing. A lubricating device characterized in that the extension housing is opened into the extension housing near the bearing member to supply lubricating oil to the bearing member provided at the tip end of the extension housing for supporting the output shaft. achieved.

Effects and Effects of the Invention According to the above-described configuration, lubricating oil is sufficiently supplied to the bearing member provided at the tip of the extension housing through the lubricating oil hole provided in the extension housing. This prevents the bearing member from running out of lubricating oil, ensures the durability of the bearing member, and extends the life of the bearing member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail by way of embodiments with reference to the accompanying drawings.

FIG. 1 shows an example of a four-wheel drive transfer device incorporating a lubricating device according to the present invention.

In FIG. 1, reference numeral 10 indicates an internal combustion engine, which is placed horizontally at the front of the vehicle.
are connected in order.

The automatic transmission 12 for a vehicle has a hydraulic torque converter and a transmission device having a general structure. The hydraulic torque converter is drivingly connected to the output shaft of the internal combustion engine 10 by an input member and is given rotational power by the internal combustion engine 10,
An output member is drivingly coupled to an input member of the transmission. The transmission may be of conventional construction, including a planetary gear arrangement, and is adapted to switch between a plurality of forward gears and at least one reverse gear.

The four-wheel drive transfer device 20 has a center differential device 22. The center differential device 22 is rotatably supported by an input gear 24 meshing with an output gear 16 provided on the output shaft 14 of the transmission, a differential case 26 connected thereto, and a spider 28 from the differential case 26. It has a differential pinion 30, and a rear export force side gear 32 and a front export force side gear 34 that mesh with the differential pinion 30, respectively.

A rear export force gear 36 is connected to the rear export force side gear 32, and a rear wheel drive gear 38 of a rear wheel drive shaft (output shaft) 40 meshes with the rear export force gear 36.

A hollow front wheel drive shaft 42 is connected to the front export force side gear 34. The front wheel drive shaft 42 is drivingly connected to a differential case 46 of a front differential device 44 . Front differential device 4
4 includes a differential pinion 50 rotatably supported by a spider 48 from a differential case 46, a differential side gear 52 and a left side gear 54 that mesh with the differential pinion 50, respectively. One end of the right side gear shaft 56 and one end of the left side gear shaft 58 are drivingly connected to the left side gear 54, respectively.

The four-wheel drive transfer device 20 has a differential case 26 which is an input member of the center differential device 22, a front wheel drive shaft 42 which is one output member of the center differential device 22, and a selective torque transmission relationship with the integrated differential case 46. A hydraulically operated differential control clutch 60 is provided which is connected to the hydraulically operated differential control clutch 60. The differential control clutch 60 is a hydraulic servo-type wet multi-disc clutch, and the servo piston moves against the spring force of the return spring by the servo oil pressure supplied to the oil chamber of the hydraulic servo device, so that the differential case 26 is connected to the differential control clutch 60. The differential case 46 is connected in a torque transmission relationship, and the transmission torque capacity is increased proportionally in accordance with an increase in the servo oil pressure supplied to the oil chamber.

FIG. 2 shows a specific embodiment of a four-wheel drive transfer device equipped with a lubricating device according to the present invention. The rear output power gear 36, which is configured as a ring gear, is secured to the assembly of ring gear mount members 62 and 64 by bolts 66, and the hollow hub portion of the rear output power gear 32 is secured by the ring gear mount member 62 to the assembly of ring gear mount members 62 and 64. 33 in a torque transmission relationship. Ring gear mount member 62
and 64 are rotatably supported by transfer cases 72 and 74, which are differential housings, by tapered roller bearings 68 and 70, respectively.

The right side gear shaft 56 is composed of a side gear intermediate shaft 76 and a hollow side gear shaft holder 78, and the side gear intermediate shaft 76 is connected to the right side gear 52 at one end thereof.
It extends through the hollow part of the forward drive shaft 42, the hollow part of the hollow hub part 33 of the rear export force side gear 32, and the hollow part of the hollow hub part 63 of the ring gear mount member 62, and The end is spline connected to one end of the side gear shaft holder 78. Side gear shaft holder 7
8 protrudes outward from an opening 80 provided in the transfer case 72, and a shaft coupling member 82 used for connection with the front wheel is spline-coupled to the protruding end.

A cylindrical retainer 84 having a flange portion 86 is removably fitted inside the opening 80, and the retainer is attached to the opening end surface 81 of the transfer sleeve 2 at the flange portion 86.
transfer case 72 by bolt 88 in contact with
It is removably fixed to. Side gear holder 78
extends through the hollow part 85 of the retainer 84,
A cylindrical bearing 90 and an oil seal member 92 are arranged between the retainer 84 and the side gear holder 78, respectively. An oil seal member 94 is also provided between the retainer 84 and the hollow hub portion 63 of the ring gear mount member 62.
is installed.

At the back of the opening 80 is the aforementioned Taber roller bearing 68.
is located, and the tapered roller bearing is located in the retainer 86.
A preload in the thrust direction can be applied by tightening a cup-shaped adjusting nut 96 screwed into the transfer case 72 at a deeper position.

The rear wheel drive shaft 40 is a gear shaft 98 that is integral with the rear wheel drive gear 38.
and a shaft coupling member 100 spline-engaged with the gear shaft, and the gear shaft 98 is fixed to the transfer case 74 by bolts 106 through two tapered roller bearings 102 and 104 spaced apart from each other in the axial direction. The shaft coupling member 100 is rotatably supported by a bearing cage member 108, and the shaft coupling member 100 has its hub portion 101 connected to the bush 11.
The bearing cage member 108 is rotatably supported by an extension housing 114 fixed to the bearing cage member 108 by bolts 112. Extension housing 1
The shaft coupling member 10 is located on the tip side of the bush 110 of 14.
An oil seal member 112 is attached between the hub portion 101 and the hub portion 101 of FIG.

A lubricating oil supply passage 118 is provided at the fitting portion between the transfer case 74 and the bearing cage member 108, and the lubricating oil supply passage 118 supplies lubricating oil from an oil pump 126 (described later) through a lubricating oil supply pipe (not shown). is being supplied. The lubricant supply passage 118 communicates with a lubricant hole 122 through a lubricant hole 120 provided in the bearing cage member 108 . The lubricating oil hole 122 extends through the bearing cage member 108 in the axial direction thereof and has an end portion 123.
The bearing cage member 108 is opened at the joint end surface 109 of the bearing cage member 108 with the extension housing 114 . The extension housing 114 is provided with a lubricating oil hole 124 that opens at one end 124 a at the joint end surface 115 with the bearing cage member 108 and communicates with the lubricating oil hole 122 .

The lubricating oil hole 124 is located in the extension housing 114.
extends from the joint end surface 115 toward the tip, and the other end 1
It opens into the extension housing 114 near the bushing 110 at 24b.

The pump 126 is of a rotating type such as a gear pump, and has a pump drive shaft 128 supported on both sides by transfer cases 72 and 74, and a drive gear 130 is attached to the pump drive shaft. The drive gear 130 is
It meshes with a gear member 132 attached to the outer circumference of the ring gear mount member 62, and is driven to rotate as the ring gear mount member 62, which is the output member for the rear wheel, rotates.

The pump 126 is driven by the rotation of the ring gear mount member 62 to suck the lubricating oil collected at the lower bottoms of the transfer cases 72 and 74, and pump this lubricating oil to the lubricating oil passage 118. Lubricating oil passage 11
The lubricating oil pumped into the extension housing 114 passes through the lubricating oil holes 120 and 122 and reaches the lubricating oil hole 124 of the extension housing 114.
The lubricating oil is supplied to the bushing 110 from the end 124b of the lubricating oil hole 124. As a result, Bush 110
A sufficient flow rate of lubricating oil is supplied to ensure sufficient lubrication and cooling.

The lubricating oil flowing into the extension housing 111 from the end 124b of the lubricating oil hole 124 lubricates and cools the bushing 110, and then flows through the extension housing 114 to reach the installation part of the tapered roller bearing 104, where it lubricates the bushing 110. The oil flows into the transfer cases 72 and 74, and collects at the bottom of the transfer cases 72 and 74. The pump 116 is then supplied again.

As described above, according to the lubricating device according to the present invention, the bushing 110 for supporting the output shaft located at the tip of the extension housing 114 is forcibly lubricated by the lubricating oil from the lubricating oil hole 124, and thereby the bushing 110 is lubricated and Insufficient cooling is avoided and Bush 11
0 will be sufficiently lubricated and cooled.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a skeleton diagram showing an example of a four-wheel drive transfer device incorporating a lubricating device according to the present invention, and FIG. 2 shows a specific embodiment of a four-wheel drive transfer device equipped with a lubricating device according to the present invention. FIG. 10... Internal combustion engine, 12... Vehicle automatic transmission, 1
4... Output shaft, 16... Output gear, 20... Four-wheel drive transfer device, 22... Center differential device, 24... Input gear, 26... Differential case, 28...・Spider, 30...
Differential binion, 32...Side gear for rear export force, 34...Side gear for front export force, 36...
・Rear export power gear, 38... Rear wheel drive gear, 40...
Rear wheel drive shaft. 42...Front wheel drive shaft, 44...Front differential device, 46...Differential case. 48... Spider, -50... Differential pinion, 52... Right side gear, 54... Left side gear. 56...Right side gear shaft, 58...Left side gear shaft. 60...Differential control clutch, 62...
・Ring gear mount member, 63...Hollow knob 1 part,
64...Ring gear mount member, 66...Bolt, 68.70...Tapered roller bearing, 72.74...
... Transfer case, 76... Side gear intermediate shaft, 78... Side gear shaft holder, 80... Opening, 81... Opening end surface, 82... Shaft coupling member, 84...
...retainer. 86...Flange part, 88...Bolt, 90...
Cylindrical bearing, 92.94...Oil seal member. 96...adjusting nut, 98...gear shaft. 100... Shaft coupling member, 101... Sleeve part, 1
02.104...Tapered roller bearing, 106...
Bolt, 108... Bearing cage member, 110... Bush. 112... Bolt, 114... Extension housing, 116... Oil seal member, 118...
・Lubricating oil passage, 120.122...Lubricating oil hole, 123
... end, 124 ... lubricating oil hole, 126 ... oil pump. 128... Pump drive shaft, 130... Drive gear, 1
32...Gear member

Claims (1)

[Claims] In the lubricating device for the bearing of the output shaft of the vehicle power transmission device,
A lubricating oil hole is provided in the extension housing, and the lubricating oil hole is located near the bearing member in order to supply lubricating oil to the bearing member provided at the tip of the extension housing to support the output shaft. A lubricating device characterized in that it is open to the inside of the extension housing.