JPH0221467B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forcibly supplying lubricating oil to a planetary gear bearing of a planetary gear set.

[Prior Art] Conventionally, in a carrier floating type planetary gear set in which the planetary carrier rotates relative to the center axis, an oil passage is provided in the carrier, and a lubricating oil supply oil passage provided in the center axis is connected to the planetary gear shaft. A forced lubricating oil supply method that communicates with the lubricating oil path cannot be adopted, and a method of forming an oil path in other parts connected to the carrier requires a long lubricating oil supply path, making processing and assembly difficult. Therefore, it had the disadvantage of increasing manufacturing costs.

[Problems to be Solved by the Invention] Therefore, an object of the present invention is to provide a method for forced lubrication of a planetary gear bearing that is easy to process and assemble in a carrier floating type planetary gear set.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a central shaft and a planetary gear set disposed on the central shaft, wherein the central shaft is connected to the planetary gear set. a first oil passage disposed axially in the central shaft for supplying lubricating oil; and a second oil passage communicating with the first oil passage, extending in the radial direction, and having an opening on the outer periphery. The planetary gear set includes an annular oil receiver disposed separately from the second oil channel, and a carrier liquid-tightly connected to the annular oil receiver. The annular oil receiver includes a radial oil passage which is provided radially opposite to the second oil passage and has a U-shape with an open inner periphery and closed outer periphery and both side walls; an axial oil passage passing through one side wall in the axial direction and communicating with the radial oil passage, the carrier having a third oil passage communicating with the axial oil passage and extending in the axial direction; and a fourth oil passage connected to the third oil passage, extending in the radial direction, and having an opening on the outer periphery, the method for forcibly supplying lubricating oil to the planetary gear bearing of the planetary gear set. has.

[Operations and Effects] The present invention provides a central axis and a planetary gear set disposed on the central axis, wherein the central axis has the following features:
a first oil passage disposed axially in the central shaft for supplying lubricating oil to the planetary gear set; and a first oil passage connected to the first oil passage extending in the radial direction and having an opening on the outer periphery. The planetary gear set has a second oil passage provided with a ring, and a carrier that is liquid-tightly connected to the annular oil receiver. The annular oil receiver includes a U-shaped radial oil passage that is provided radially opposite to the second oil passage and has an open inner periphery and closed outer periphery and both side walls; The carrier has an axial oil passage that axially penetrates one side wall of the radial oil passage and communicates with the radial oil passage, and the carrier includes:
a third axially extending oil passage connected to the axial oil passage;
and a fourth oil passage connected to the third oil passage, extending in the radial direction, and having an opening on the outer periphery, the lubricating oil supplied to the central shaft is caused to spread in the radius by centrifugal force. Radial oil is spouted outward in the direction, and is provided in the annular oil receiver radially opposite to the second oil passage, and has a U-shape in which the inner periphery is open and the outer periphery and both side walls are closed. an axial oil passage of the carrier, which is connected to the axial oil passage of the carrier via an axial oil passage that axially penetrates one side wall of the radial oil passage and is connected to the radial oil passage; Lubricating oil is forcibly supplied to the planetary gear bearing through a third oil passage extending in the third oil passage, and a fourth oil passage communicating with the third oil passage, extending in the radial direction, and having an opening on the outer periphery. can do.

[Embodiment] Fig. 1 shows a front engine, front drive type automatic transmission for an automobile. The transmission device of this automatic transmission includes a torque converter 100 that is a fluid coupling, an input shaft 210 that is integral with the output shaft 110 of the torque converter, and an end that is concentric with the input shaft 210 and opposite to the rear engine ( (hereinafter referred to as the rear end)
a first shaft 200 consisting of an output shaft 220 to which an output gear 230 is spline-fitted;
A planetary gear transmission mechanism 300 is arranged parallel to the first shaft, and an input gear 430 that meshes with the output gear 230 of the first shaft is attached to the rear end, and is supported by the automatic transmission case, and is connected to the engine. The input shaft 410 is supported by the automatic transmission case via a bearing, and the tip end of the input shaft 410 is rotatably supported via tapered roller bearings 421 and 422. A second shaft 400 consisting of an output shaft 420 provided with an output gear 440, an input shaft 410 and an output shaft 4
20, a differential 600 having a large drive gear 610 that is parallel to the second shaft 400 and meshes with the output gear 440 of the second shaft. .

The torque converter 100 has an engine output shaft 1
01, a pump impeller 103 connected to the front cover 102, a turbine runner 105 connected to an output shaft 110, and a one-way clutch 106 connected to the automatic transmission case. stator 107;
It consists of a direct coupling clutch 108.

First planetary gear transmission mechanism 300 provided between input shaft 210 and output shaft 220 of first shaft 200
is an underdrive device for shifting three forward speeds and one reverse speed, and includes a front planetary gear set 310, a rear planetary gear set 320, a first multi-plate clutch 330, and a mechanism for engaging and disengaging the multi-plate clutch. Hydraulic servo 331, second multi-disc clutch 340, hydraulic servo 341, first multi-disc brake 350, hydraulic servo 351, second multi-disc brake 360, hydraulic servo 36
1, with one-way clutches 370 and 380.

Second planetary gear transmission mechanism 500 provided between input shaft 410 and output shaft 420 of second shaft 400
includes a planetary gear set 510, a multi-disc brake 520, its hydraulic servo 521, and a multi-disc clutch 5.
30, its hydraulic servo 531 and one-way clutch 540.

The differential 600 includes a driving large gear 610 that meshes with the output gear 440 of the second shaft, and a support shaft that is bolted to the driving large gear and that protrudes from both sides and is connected to the automatic transmission case via bearings. Differential gear box (gearbox) rotatably supported by
620, a small gear shaft 630 whose both ends are supported by the central box wall of the gearbox 620 and fixed with pins, and which is provided in the rotational direction of the gearbox 620; and a small gear shaft 630 rotatably supported by the small gear shaft 630. a pair of differential small gears 640 and 650 which are provided in the gearbox 620 and facing each other, and one differential large gear 660 and the other differential gear which are meshed with both of the differential small gears 640 and 650, respectively. Large dynamic gear 670 and axles 680 and 690
It consists of

This automatic transmission has a fastening surface 70 with the engine.
A torque converter housing 710 with an opening at 0A and housing the torque converter 100, and a differential 60 with an opening on the side opposite to the engine.
Differential housing 7 where 0 is stored
20, and a second shaft support wall portion 7 that supports the tip of the second shaft.
Torque converter case 700 consisting of 30
, a transmission room 810 consisting of a first room 811 in which the first shaft planetary gear transmission mechanism 300 is housed, and a second room 812 in which the second shaft planetary gear transmission mechanism 500 is housed; The automatic transmission includes a transmission case 800 that includes a differential room side wall portion 820 that covers the opening of the transmission case 720, and a gear cover 900 that is fastened to the side wall of the transmission case 800 opposite to the torque converter. installed inside the case. 910
is a hydraulic control device for an automatic transmission, which regulates the discharge pressure of an oil pump 130 provided between the torque converter 100 and the planetary gear transmission mechanism 300 to line pressure to the hydraulic servo, torque converter, and parts requiring lubrication. Output as hydraulic oil or lubricating oil.

In this configuration, the planetary gear set 510 includes a ring gear 512 spline-fitted to an annular disc-shaped support wall 511 fixed to an input shaft 410 that is a central shaft, and a ring gear 512 rotatably fitted to the input shaft 410. A sun gear 514 provided on a sun gear shaft 513, a parking gear 450 fixed to the output shaft 420, and a governor drive gear drum 4 welded to the outer periphery of the parking gear 450.
60, a planetary gear shaft 516 fixed to the carrier 515, a planetary gear shaft 516 rotatably supported by the planetary gear shaft 516 through a needle bearing 8, and the ring gear 512. and planetary gear 51 meshed with sun gear 514
7, lubricating oil is supplied to the bearing 8 from the hydraulic control device 910 through an oil passage 1 formed in the torque converter case 700 to the axis of the input shaft 410, which is the central axis of the planetary gear set. a shaft hole 2 provided therein; a radial hole 3 that communicates with the shaft hole 2 and is a lubricating oil spouting oil passage having an opening on the outer periphery;
The sun gear shaft 513, which together with the input shaft 410 forms the center axis of the planetary gear set, is provided with a radial hole 4 having an opening on the outer periphery and is a lubricating oil jetting oil passage, and the open inner periphery 51 is a lubricating oil jetting oil passage. A planetary carrier 515 faces the hole 4.
The rear end is fixed to the outer wall, the inner periphery 51 is open,
A pipe-shaped discharge port 53 whose outer periphery 52 is closed and which fits into the axial hole 6 of the planetary gear shaft is provided on one side wall 50.
An annular oil receiver 5 with a protruding surface, a planetary gear shaft 5
This is done through an axial bore 6 provided in the outer wall of the carrier at 16 and a radially outward bore 7 communicating with the axial bore 6 . This lubricating oil is supplied by the lubricating oil that is ejected from the shaft hole 2 of the input shaft 510 through the radial holes 3 and 4 due to hydraulic pressure and centrifugal force, and accumulates in the shaped oil receiver 5. The oil is supplied under pressure to the axial hole 6, which is an oil path inside the planetary gear shaft, and is forced out through the outward hole 7.

As shown in FIGS. 2 to 4, the annular oil receiver 5 is made of plastic and has a U-shaped cross section with an open inner periphery and a closed outer periphery.
A pair of claws 54 and 55 for engaging with the carrier are protruded from the center of the side wall 50 in the same direction as the carrier, and the claws 5 are inserted into the groove 10 shown in FIG. 1 formed in the corresponding portion of the carrier.
4,55 is inserted. The pawls 54 and 55 are two elastically deformable engaging protrusions, each of which is tapered at an angle of about 30 degrees on the outside of the distal end thereof, and has engaging steps 5a and 5b formed thereon, and is pushed into the groove of the carrier. It is configured so that it can be engaged with.

As described above, the method for forced lubrication of a planetary gear bearing according to the present invention is a planetary gear set in which the carrier is floating relative to a central shaft with a lubricating oil supply passage, and a lubricating oil jet provided on the central shaft and having an opening on the outer periphery is used. an oil passage, an axial oil passage provided in a planetary gear shaft fixed to the carrier from the outside of the carrier, and an axial oil passage formed in the planetary gear shaft and connected to the axial oil passage and directed outward in the radial direction with respect to the central axis; The oil passage in the planetary gear shaft is fixed to the outer wall of the carrier, and the inner periphery corresponding to the jetting oil passage is open, the outer periphery is closed, and the side wall part is fitted into the axial oil passage of the planetary gear shaft. A lubricating oil supply path consisting of an annular oil receiver with a mating pipe-shaped discharge port protruding is provided, and lubricating oil is forcibly supplied to the planetary gear bearing, making it easy to process and assemble in a carrier floating type planetary gear set. Forced lubrication is possible with an easy configuration.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an automatic transmission for an automobile using the forced lubrication method for planetary gear bearings according to the present invention, Fig. 2 is a sectional view of an annular oil receiver, Fig. 3 is a right side view thereof, and Fig. 4 is a BB sectional view thereof. In the figure, 510...planetary gear set, 5...
...Annular oil pan, 410...Center shaft, 515...Planetary carrier, 516...Planetary gear shaft.

Claims (1)

[Scope of Claims] 1. A central shaft and a planetary gear set disposed on the central shaft, the central shaft having an axially extending portion in the central shaft for supplying lubricating oil to the planetary gear set. The planetary gear set has a first oil passage arranged therein, and a second oil passage connected to the first oil passage, extending in the radial direction, and having an opening on the outer periphery. an annular oil receiver disposed separately from the second oil passage; and a carrier liquid-tightly connected to the annular oil receiver, the annular oil receiver being radially connected to the second oil passage. A U-shaped radial oil passage provided facing each other and having an open inner periphery and a closed outer periphery and both side walls; The carrier has a third oil passage connected to the axial oil passage and extending in the axial direction, and a third oil passage communicating with the third oil passage and extending in the radial direction. and a fourth oil passage having an opening on its outer periphery, the method comprising: forcibly supplying lubricating oil to the planetary gear bearing of the planetary gear set. 2. Claim 1, characterized in that either one of the annular oil pan and the carrier is provided with a protrusion, and the other is provided with an engaging means that engages with the protrusion. Forced lubrication method for planetary gear bearings described. 3. The protruding portion is a pawl provided at the center of a side wall of the annular oil receiver in the same direction as the axial oil passage, and the engaging means is a groove formed in the carrier. A method for forced lubrication of a planetary gear bearing according to claim 2.