JPS6318050B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-way clutch device provided between a stator and a fixed shaft of a torque converter, and is particularly characterized by a method of attaching an outer race of the one-way clutch to the stator.

1 to 3 show conventional devices of this type. In the figure, 1 is a plate that transmits the rotation of the engine (not shown) to the torque converter 2, 3 is the pump impeller of the torque converter 2, 4 is the turbine runner, 5 is the stator, 6 is the output shaft, 7 is the fixed shaft, and 8 is the Power take-off gear, 9 is one-way clutch outer race, 10 is inner race, 1
1 is a sprag, 12 and 13 are retainers, 14 (see FIGS. 2 and 3) is a cage, and 15 is a spring.

However, in order to fix the outer race 9 of the one-way clutch to the inner periphery of the stator 5 in this conventional device, as shown in FIGS. 2 and 3, notch grooves 9a are provided on the outer periphery of the outer race 9, and A protrusion 5a was provided on the inner peripheral surface of the stator 5 to fit into the notch groove 9a.

However, when the outer race 9 is provided with the cutout grooves 9a, the strength of the outer race 9 at that portion is reduced, resulting in hair cracks 16 as shown in FIG. This caused the normal state shown in Fig. 2 to roll over as shown in Fig. 3.

Furthermore, in order to prevent such a failure, the thickness of the outer race 9 must be increased, and as the outer diameter of the outer race 9 is increased, the torque converter as a whole becomes larger.

The present invention was devised to solve these problems, and it is an object of the present invention to securely fix the outer race of a one-way clutch to the stator without reducing the strength of the outer race or increasing the size of the torque converter. The purpose is to

Embodiments of the present invention will be described below with reference to FIGS. 4 and 5. In the figure, the same reference numerals as in FIGS. 1 to 3 indicate equivalent parts.

FIG. 4 shows a first embodiment of the present invention. In this case, convex portions 9c are provided in a distributed manner on one side edge of the outer race 9, and when the stator 5 is cast, these are formed as shown in FIG. 4b. It is integrally formed by casting.

In this way, the protrusion 9 of the outer race 9
c is embedded in the annular protrusion 5c of the stator 5 and is securely fixed. In the figure, 5e indicates lubrication holes distributed in the annular protrusion 5c, 18 indicates an escape groove provided for polishing after casting, and 19 indicates a groove for fitting the stop ring.

Furthermore, in FIG. 5, a concave portion 9d is provided in the outer race 9 in place of the convex portion 9c in FIG. 4, and this is integrally cast when the stator 5 is cast, as in the case of FIG. In the figure, the same reference numerals as in FIG. 4 indicate equivalent parts.

As described above, in the device of the present invention, the outer race 9 of the one-way clutch does not have the cutout groove 9a on the outer peripheral surface as in the conventional case, but has a convex portion 9c or a concave portion 9d on one side edge of the outer race 9 in the axial direction. Since this is provided to prevent the outer race 9 from rotating, the present invention eliminates the risk of lowering the strength of the outer race 9 as in the prior art. Further, since there is no need to increase the outer diameter of the outer race 9, there is no need to worry about the torque converter becoming large, and on the contrary, the effect of making the torque converter smaller is achieved.

Further, an annular protrusion 5c formed integrally with the stator 5
Since this replaces the conventional retainer 13 shown in FIG. 1, the present invention has the advantage of reducing the number of parts, simplifying processing, and reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional device, FIGS. 2 and 3 are partially enlarged views of the main parts thereof, and FIG. 4a is a longitudinal sectional side view of an outer race showing the first embodiment of the present invention. 5b is a vertical side view of the stator in which the outer race is cast, FIG. 5a is a vertical side view of the outer race showing a modification of FIG. 4, and FIG. It is a diagram. DESCRIPTION OF SYMBOLS 1...Plate that transmits engine rotation, 2...Torque converter, 3...Pump impeller, 4...Turbine runner, 5...Stator, 5a...Protrusion, 5
b...Inner peripheral surface, 5c...Annular protrusion, 5d...Notch groove, 6
...output shaft, 7...fixed shaft, 8...power take-off gear, 9...
Outer race of one-way clutch, 9a... Notch groove, 9c... Convex part, 9d... Concave part, 10... Inner race, 11... Sprag, 12, 13... Retainer, 14... Cage, 15... Spring.

Claims (1)

[Claims] 1. A torque converter characterized in that a protrusion or groove is provided on one side edge of an outer race of a one-way clutch that fits into the inner periphery of a stator of a torque converter, and this outer race is integrally cast with the stator at the time of casting the stator. Converter one-way clutch device.