JPS6315647Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field The present invention relates to a device for lubricating a one-way clutch provided in an automatic transmission.

(2) Prior art Automatic transmissions require a one-way clutch to prevent a rotating body from reversing at a specific gear, but since this one-way clutch idles at high speed in other gears, it consumes a large amount of oil. If sufficient lubrication is not provided, the inner race and rollers of the one-way clutch will suffer abnormal wear.

On the other hand, automatic transmissions change gears by switching the power transmission path of the planetary gear set, but due to the structure of the automatic transmission, the above-mentioned one-way clutch must be placed around the planetary gear set. be. In this case, it is customary to lubricate the one-way clutch by introducing oil into the one-way clutch after passing through the planetary gearset radially outward from its center. (Unexamined Japanese Patent Publication No. 49-37056
However, a planetary gear set consists of a planetary gear that meshes with a sun gear and an internal gear and is supported between a carrier plate and a carrier base that face each other, and the carrier plate rotates in the direction of its rotational axis. Since the extending pawl is integrally connected to the carrier base by penetrating the corresponding window of the carrier base, the oil may leak out from the gap around the pawl, or when the carrier plate and the carrier base are connected together, the oil may leak out from the gap at the periphery of the pawl, or when the carrier plate and the carrier base are connected together. The oil also leaked from the hole for inserting the gauge used to make the spacing accurate, and it was inevitable that there would be little oil going to the one-way clutch, resulting in insufficient lubrication.

(3) Purpose of the invention This invention prevents oil from leaking from the gaps around the pawl, collects the oil on the radially inner surface of the pawl, and transfers this oil to the one-way clutch through the through hole provided in the pawl. It is an object of the present invention to provide a sufficient amount of lubricating oil for a one-way clutch, thereby solving the above-mentioned problems.

(4) Structure of the invention For this purpose, the one-way clutch lubricating device of the invention is used in the above type of automatic transmission, in which the carrier plate is provided with a pawl extending in the direction of its rotational axis, and the tip of the pawl is connected to the carrier base. penetrating the window, joining the carrier plate to the carrier base by welding at least the radially inner surface of the pawl to the carrier base, recessing the pawl so as to open toward the center of the planetary gear set; It is characterized by having a through hole for oil to pass through.

(5) Embodiments Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

Fig. 1 shows the main parts of an automatic transmission equipped with a one-way clutch lubricating device, which is an example of the configuration of the present invention, in which 1 is the transmission case, 2 is the input shaft, and 3 is the one provided on the input shaft 1 A planetary gear set, 4 is a one-way clutch arranged around the planetary gear set 3, and 5 is a high clutch.

The planetary gear set 3 includes a sun gear 6, an internal gear 7, and a planetary gear 8 that meshes with these and can roll, and the planetary gear 8 has a carrier plate 9 and a carrier base 10 facing each other.
It is rotatably supported via a shaft 11 in between. The sun gear 6 is rotatably supported on the input shaft 2 via a hub sleeve 12, to which a carrier plate 9 is spline-coupled and a clutch hub 13 is coupled. The clutch hub 13 constitutes a high clutch 5 together with a clutch drum 14 surrounding it, a clutch pack 15 interposed between the hub 13 and the drum 14, and a clutch actuation piston 16. When the high clutch 5 is actuated by the piston 16, the carrier plate 9 is connected to the input shaft 2. shall be driven and coupled to.

As shown in FIGS. 2 and 3, the carrier plate 9 is provided with a plurality of claws 9a extending in the direction of its rotational axis toward the carrier base 10 at equal intervals in the circumferential direction, and the tips of these claws are carrier base 1
It penetrates into the corresponding window 10a of 0. Then, the radially inner surface of the claw 9a is electron beam welded to the carrier base 10 as shown at 17, thereby integrally joining the carrier plate 9 to the carrier base 10.

Note that this connection is performed before attaching the inner race 18 of the one-way clutch 4 to the carrier base 10, and the hole 10b provided in the carrier base 10 is
The spacing gauge 19 is then inserted between the carrier plate 9 and the carrier base 10, and the carrier plate 9 and the carrier base 10 are joined together by electron beam welding 17 while maintaining the exact spacing between them.

After that, attach the inner race 18 to the carrier base 1.
0 by electron beam welding 20, and the inner race 18, the outer race 21, and the roller 2.
2 constitutes a one-way clutch 4. By spline-coupling the outer race 21 to the transmission case 1, the one-way clutch 4 can freely rotate the carrier base 10 in only one direction.

The lubricating oil hole 2a of the input shaft 2 passes through the chamber 25 defined between the bearing bushes 23 and 24 of the hub sleeve 12, the through hole 12a of the hub sleeve 12, and the through hole 6a of the sun gear 6, and then enters the inside of the planetary gear set 3. It also communicates with the inside of the one-way clutch 4 through a through hole 26 provided in the pawl 9a and a through hole 18a provided in the inner race 18.

In addition, the pawl 9a is curved around the axis of rotation as clearly shown in FIG. 2, thereby recessing the radially inner surface of the pawl 9a to open toward the center of the planetary gear set 3.

In the embodiment described above, the one-way clutch 4 is lubricated as follows.

The oil supplied from the hole 2a first reaches the planetary gear set 3 through the chamber 25 and the through holes 12a and 6a, as shown by the arrow in FIG. 1, and lubricates this planetary gear set. During this time, the oil passes through the planetary gear set 3 radially outward, and the oil that reaches the radially inner surface of the pawl 9a, since this surface is concave,
Further, in order to prevent the oil from leaking, the electron beam welding 17 is entirely conducted from the through hole 26 to the through hole 18a.
Thereafter, oil can be supplied into the one-way clutch 4 through the through hole 18a to lubricate the inside thereof.

(6) Effects of the invention By the way, as described above, in the present invention, the pawl 9a for connecting the carrier plate 9 and the carrier base 10 is recessed so as to open toward the center of the planetary gear set 3, and the pawl 9a is recessed in the radial direction inside. The surface of the ring 9a is welded to the carrier base 10 (indicated by 17), and the pawl 9a is provided with a through hole 26, so that a large amount of oil passing from the center of the planetary gear set 3 to the outside in the radial direction is absorbed by the pawl. Received by 9a and one-way clutch 4
It is possible to provide sufficient lubrication.

In order to achieve this effect even more prominently, it is recommended to make the radius of curvature of the claws 9a smaller than the radius of the arrangement pitch circle of the claws 9a, and to store oil on the radially inner surface of the claws 9a. I made sure it was good.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main parts of an automatic transmission equipped with the device of the present invention, Fig. 2 is a front view showing the carrier plate and carrier base of the automatic transmission in a coupled state;
FIG. 3 is a cross-sectional view of FIG. 2. 1... Transmission case, 2... Input shaft, 3... Planetary gear set, 4... One-way clutch, 5... High clutch, 6... Sun gear, 7... Internal gear, 8... Planetary gear, 9 ...Carrier plate, 9a...Claw, 1
0...Carrier base, 10a...Window, 10b...
...Space gauge insertion hole, 11...Shaft, 17...Electron beam welding, 18...Inner race, 20...Electron beam welding, 21...Outer race, 22...
Laura, 26...through hole.

Claims (1)

[Scope of utility model registration request] A planetary gear set in which a planetary gear that meshes with a sun gear and an internal gear and rotates is supported between a carrier plate and a carrier base that face each other, and a one-way clutch arranged to surround the planetary gear set. In an automatic transmission, the oil having passed through the planetary gear set radially outward from the center thereof is guided to the one-way clutch to lubricate the one-way clutch. providing a pawl extending to the carrier base, the tip of the pawl penetrating the corresponding window of the carrier base, and at least a radially inner surface of the pawl being welded to the carrier base to couple the carrier plate to the carrier base; A one-way clutch lubricating device for an automatic transmission, characterized in that the pawl is recessed so as to open toward the center of the planetary gear set, and the pawl is provided with a through hole through which the oil passes.