JPH025154Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a one-way clutch device for an automatic transmission.

(Prior art) A one-way clutch device for an automatic transmission is constructed by attaching a one-way connecting member such as a sprag or a ball to the gap between a ring-shaped inner race and an outer race that are arranged concentrically so as to be relatively rotatable. ing. In a one-way clutch device with such a configuration, it is necessary to prevent the one-way coupling member from coming off in the axial direction, and for this reason, conventionally, a dedicated stopper was used on the outer race side, as shown in, for example, Japanese Utility Model Application Publication No. 57-107041. However, when a dedicated retaining member is provided in this manner, the number of parts increases accordingly, resulting in a complicated and expensive structure.

Furthermore, normally, a thrust load acts on the outer race of a one-way clutch due to lubricating oil pressure in the transmission case, but the above-mentioned known example has a member that supports the thrust load acting on the outer race. Because it was not provided, the outer race would move in the axial direction under the thrust load (i.e., the relative axial positions of the outer race and the inner race would shift), and as a result,
There was a fear that the operation of the one-way clutch device would be hindered.

(Purpose of the invention) The present invention is an attempt to solve or improve the problems pointed out in the above-mentioned section of the prior art. It is an object of the present invention to provide a one-way clutch device for an automatic transmission capable of supporting the thrust load acting on the outer race and regulating the axial movement of the outer race.

(Means for Achieving the Object) The present invention, as a means for achieving the above object, extends the side part of the outer race in the axial direction, and connects the extension forming part to the extension forming part. It is configured to be supported in the axial direction by needle bearings disposed between the inner races and other rotating members located on both sides of the extension portion in the axial direction.

(Function) In the present invention, the above-mentioned means are employed, that is, the side portions of the outer race are formed to extend in the axial direction, and the extension forming portion is connected to the inner race located on both sides of the extension forming portion in the axial direction. By supporting the rotary member in the axial direction with needle bearings respectively disposed between them, (1) axial movement of the one-way connecting member is caused by the extension forming portion of the outer race covering the end face of the one-way connecting member; (2) The thrust load acting on the outer race is supported by needle bearings placed between the extensions in the axial direction, and the axial movement of the outer race is regulated. is obtained.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 2, the automatic transmission is constructed by sequentially disposing a torque converter 2 and a multi-speed gearing device 3 coaxially with a crankshaft 1 of an engine (not shown) from the engine side.

The torque converter 2 includes a pump 4, a turbine 5, and a stator 6. Pump 4 is fixed to crankshaft 1. The stator 6 is
It rotates via a one-way clutch device 7 on a fixed shaft 9 that is integral with the case 8 of the multi-speed gear device 3. The one-way clutch device 7 only allows rotation of the stator 6 in the same direction as the pump 4,
This functions to restrict rotation in the opposite direction.

The multi-speed gear device 3 has a central shaft 11 that passes through the center of the multi-speed gear device 3 in its axial direction.
It is equipped with The central shaft 11 has one end connected to the crankshaft 1, and the other end extends to the side wall 30 of the multi-speed gear unit 3 through the center of the multi-speed gear unit 3, and the oil is disposed on the side wall 30. It is connected to the pump 10. A hollow long-shaft turbine shaft 12 is disposed on the outside of the central shaft 11 so as to overlap the central shaft 11 in the radial direction over almost its entire axial length. This turbine shaft 12 has one end connected to the turbine 5 of the torque converter 2,
The other end is rotatably supported by the side wall 30 of the multi-speed gear device 3. A Ravigneaux-type planetary gear unit 13 is provided on the turbine shaft 12. The planetary gear unit 13 includes a small diameter sun gear 14, a large diameter sun gear 15 disposed on the side of the small diameter sun gear 14 far from the engine, and a long pinion gear 1.
6, a short pinion gear 17 and a ring gear 18. First and second clutch devices 19 and 20 are arranged in parallel on the side of the planetary gear unit 13 that is far from the engine. The first clutch device 19 is a first one-way clutch device 21 which is the main body of the present invention.
(described in detail later) through the small diameter sun gear 14
The power transmission between the turbine shaft 12 and the turbine shaft 12 is interrupted. On the other hand, the second clutch device 20 is
It connects and connects power transmission between the small diameter sun gear 14 and the turbine shaft 12 in parallel with the first clutch device 19. A first brake device 22 is arranged radially outward of the second clutch device. The first brake device 22 is a band brake, and includes a brake drum 22a connected to the large diameter sun gear 15;
It has a brake band 22b hung on the brake band 22b. A third clutch device 23 is arranged radially outward of the second clutch device 20 and on the side of the first brake device 22. The third clutch device 23 connects and disconnects power transmission between the large diameter sun gear 15 and the turbine shaft 12 via the brake drum 22a of the first brake device 22.

A second brake device 24 is disposed radially outward of the planetary gear unit 13 for engaging and disengaging the carrier 13a of the planetary gear unit 13 and the case 8 of the multi-speed gear device 3. Between the first brake device 22 and the second brake device 24, there is a second brake device in parallel with the second brake device 24 that engages and disengages the carrier 13a and the case 8.
A one-way clutch device 25 is arranged.

A fourth clutch device 26 is disposed on the side of the planetary gear unit 13 on the engine side to connect and disconnect power transmission between the carrier 13a of the planetary gear unit 13 and the turbine shaft 12. An output gear 27 connected to the ring gear 18 is disposed on the side of the fourth clutch device 26 on the engine side. The output from the output gear 27 is transmitted to a drive shaft (not shown) via an idle gear 28 and a differential ring gear 29.

The first one-way clutch device 21 constitutes the main body of the present invention, and is a ring-shaped inner race spline-engaged with the small diameter sun gear 14 of the planetary gear unit 13, as shown in an enlarged view in FIG. 32 and a spline 37 on its outer peripheral surface, the first clutch device 19
A plurality of sprags 33, which act as one-way connecting members, are arranged in the circumferential direction between the outer race 31, which also serves as a clutch bub, and
Clutch drum 38 of the first clutch device 19
and the brake drum 2 of the first brake device 22.
2a and coaxially adjacent to each other.

The outer race 31 has a side portion 31a on the first brake device 22 side extended in the axial direction of the outer race 31, and the extended portion 34 is overlapped with the inner race 32 in the axial direction. The inner diameter end portion 34a of the extension forming portion 34 of the outer race 31 includes both side surfaces of the extension forming portion 34 and the engine-side end surface 3 of the inner race 32 located on both sides of the extension forming portion 34 in the axial direction.
2a and the brake drum end surface 22c of the first brake device 22, and is supported in the axial direction by a pair of first needle bearings 41 and a second needle bearing 42, which are respectively arranged in two gaps formed between the brake drum end surface 22c of the first brake device 22. . Further, the end face 32b of the inner race 32 on the side opposite to the engine is supported in the axial direction by a third needle bearing 43 disposed between the end face 32b and the clutch drum 38 of the first clutch device 19. Therefore, even if a thrust load is applied to the outer race 31 due to oil pressure of lubricating oil or the like, the thrust load can be supported by the extension forming portion 34 of the outer race 31 and its axial movement can be restricted. , the operation of the first one-way clutch device 21 is made more reliable. That is, the extension forming portion 34 of the outer race 31 acts as a receiving portion for the thrust load acting within the case 8.

On the other hand, the sprags 33, 33, . The movement of the outer race 31 is restricted by the extension forming portion 34 of the outer race 31. In addition, the sprags 33, 33
. . , is regulated by a clutch hub 36 of the second clutch device 20 that is integrally connected to the inner race 32. That is, in this embodiment, the extension forming portion 34 of the outer race 31 and the second clutch device 20
Each of the clutch hubs 36 acts as an axial retaining member for the sprag 33.

Furthermore, lubricating oil is supplied to the sprags 33, 33, . The spragg 33, 3 from the character shape.
3. The lubricating oil supplied to the outer race 31
As a result, there is a possibility that the lubricating oil may not properly escape from the oil passage 49 formed in the space 46, and as a result, the operation of the sprags 33, 33, . For this reason, in this embodiment, an oil drain hole 44 is formed in the corner 31b of the outer race 31 from the inner surface toward the outside obliquely, and the lubricating oil is supplied into the space 46 as the outer race 31 rotates. The oil drain hole 4 is opened by centrifugal force.
4 to the outside, thereby ensuring smooth and reliable operation of the sprags 33, 33, . . .

(Effects of the invention) As is clear from the above description, the one-way clutch device of the automatic transmission of the invention is configured to prevent the one-way coupling member from coming off by the extension formed on the outer race. Therefore, conventional one-way clutch devices (for example,
Compared to the case where the one-way connecting member is prevented from coming off by a dedicated retaining member as in Japanese Patent Publication No. 107041, the structure is simpler and cheaper.

Furthermore, since the outer race is supported in the axial direction by needle bearings placed on both sides of the extension, the thrust load acting on the outer race is supported by the extension and the shaft of the outer race is supported. This makes it possible to restrict movement in the axial direction, compared to conventional one-way clutch devices (for example, Japanese Utility Model Application Publication No. 57-107041), where the outer race may move in the axial direction due to thrust load. This has the effect of ensuring reliable operation of the one-way clutch device.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of a portion of FIG. 2, and FIG. 2 is an overall sectional view of an automatic transmission equipped with a one-way clutch device according to an embodiment of the present invention. 1...Crankshaft, 2...Torque converter,
3... Multi-speed gear device, 4... Pump, 5...
Turbine, 6... Stator, 7, 21, 25...
One-way clutch device, 8... Case, 9...
Fixed shaft, 10... Oil pump, 11... Central shaft, 12... Turbine shaft, 13... Planetary gear unit, 14, 15... Sun gear, 16, 1
7... Pinion gear, 19, 20, 23, 26...
...clutch device, 22, 24...brake device,
31... Outer lace, 32... Inner lace, 33... Sprag, 34... Extension forming part,
41, 42, 43...needle bearing.

Claims (1)

[Scope of utility model registration request] It is constructed by attaching a one-way connecting member such as a sprag, a roll, etc. between an inner race and an outer race which are arranged concentrically so as to be relatively rotatable, and which are coaxially adjacent to other rotating members on the rotating shaft. A one-way clutch device for an automatic transmission arranged in which a side portion of the outer race is formed to extend toward the axial center so as to overlap with the inner race in the axial direction, and the extension portion and the extension A one-way clutch device for an automatic transmission, characterized in that needle bearings are disposed between the inner race and the other rotating member located on both sides of the forming portion in the axial direction.