JPS61294225A - One-way clutch mechanism of torque converter - Google Patents

Abstract

PURPOSE:To prevent breakage of a leaf spring by providing concave portions where both ends of a roller are fitted with a space in the radial direction of the roller on both retainers, whereby when the roller moves to the unlock side end portion, the leaf spring is not totalling compressed. CONSTITUTION:Shallow concave portions 15 where both end portions of a roller 14 longer than a conventional roller are fitted with a gap G in the radial direction of the roller are disposed at equal intervals corresponding to the number of the rollers 14 on flat surfaces 8 with which retainers 11 on both sides confront. The concave portion 15 is a circular hole having a radius larger than that of the roller 14 by the above gap G, so that the roller 14 can move from the position concentric with the concave portion 15 in the opposite direction to the direction of an arrow A by the gap G. Even if the roller 14 is moved toward the unlock wide (in the opposite direction to the arrow A) to reach the position 14', the roller compresses the leaf spring by the gap G which is far from the total compression.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a one-way clutch mechanism that can be employed in torque converters for automobiles, vehicles, etc.

(Prior art) Conventionally, for example, as shown in FIG.
The ends of 3 merely face the flat surface 8 of the double retainer 7.7. In the roller groove 5, as shown in FIG. 4, a handling spring 9 for returning the roller is arranged on the non-locking side of the roller 3 (on the right side in FIG. 4). However, if the []-53 is in a free state in the roller groove 5, when the stator 1 and the outer race 4 idle in the six directions of arrows in FIG. It moves to the right (unlocked side) and is pressed against the leaf spring 9, bringing the leaf spring 9 into a fully compressed (close contact) state as shown by 3'. Since the stator 1 repeatedly idles and locks during operation of the vehicle, the leaf spring 9 breaks within a short period of time according to the conventional structure described above.

In addition, since both ends of the roller 3 are generally chamfered as shown in C (for example, 1) in FIG. 6a, therefore, the contact area (length of the line contact portion) cannot be made sufficiently large (the entire length of the roller is not effectively utilized), and the transmission torque capacity is therefore reduced. Further, according to the conventional structure, the roller 3 tends to be inclined with respect to the centerline of the torque converter, and this also has the disadvantage that the leaf spring 9 is easily damaged locally.

(Objective of the Invention) The present invention prevents full compression (close contact) of the leaf spring for roller return and damage to the leaf spring caused by this, and also enables effective use of the entire length of the roller, significantly increasing the torque capacity at the same size. The aim is to increase You can tilt the rollers while driving! It is also part of the purpose of this invention to prevent it from coming loose.

(Structure of the Invention) The present invention provides a torque converter in which an outer race of a one-way clutch and retainers on both sides of the one-way clutch are both fixed to a stator, and a roller and a leaf spring for returning the roller are arranged in a roller groove between the outer race and the inner race. In this case, both retainers are provided with recesses into which both ends of the roller fit through the gap in the radial direction of the roller, and the gap is reduced so that the leaf spring is not fully compressed when the roller moves to the non-locking end within the gap. This is a one-way clutch mechanism for a torque converter.

(Example) In FIG. 1 showing an example, the same reference numerals as those in FIG. 5 indicate corresponding parts. Outer race 4 for stator 1
The retainers 11.11 on both sides are fitted together at the splines 12, and their positions in the direction of the center line B are fixed by snap rings 13.13. The inner race 6 fits into a fixed sleeve (not shown) at the spline 34 on the inner circumference,
It is constantly stopped.

The opposite flat surfaces 8 of the retainers 11 and 11 on both sides have shallow recesses 15 into which both ends of the rollers 1 and 4, which are longer (than conventional rollers), are fitted across a gap G in the roller radial direction (Fig. 4). The same number of rollers 14 are provided at equal intervals. The bottoms of some of the recesses 15 communicate through oil holes 16 with radial oil grooves 17 provided on the surface opposite to the surface 8 .

Specifically, the fourth part 15 is, for example, as shown in FIG.
4 is a circular hole with a radius corresponding to the gap G, and therefore the roller 14 is moved from a position concentric with the recess 15 (the position indicated by the solid line in Figure 4) in the direction shown by arrow A (when viewed from the roller side, it locks). side) and the reverse A direction (unlocked side) by a gap G, respectively. Even when the roller 14 moves to the non-locking side (in the opposite direction) by the gap G and reaches the position 14' where it collides with the inner circumferential surface of the recess 15, the roller 14' still compresses the leaf spring 9 to a size that is far from fully compressed ( G) It will be compressed.

A chamfer C (for example, 11NR) not shown in FIG. 1 is provided at both ends of the roller 14, but the depth L of the recess 15 is
is larger than C (L>C), so most of the cylindrical surface of the roller 14 excluding the chamfered portion C faces the FM bottom 5a of the outer race 4 and the outer cylindrical surface 6a of the inner race 6.

That is, the effective length of the roller 14 has been substantially increased. In FIG. 1, 20 is an impeller, 21 is a front cover integrated with the impeller 20, 22 is a rotational force introduction part that introduces the rotational force of the engine into the front cover 21,
23 is a turbine, 24 is a turbine hub, and an output shaft (not shown) is fitted into a spline 25 on the inner circumference of the hub 24.

When the impeller 20 is driven in the direction of the arrow in FIG. 1, the internal working fluid is circulated and rotational force is transmitted to the turbine 23 and the turbine hub 24.

Stator 1 during stall and until the speed ratio reaches a predetermined value.
A torque is applied in the opposite direction to the roller 14, and the roller 14 comes into pressure contact with the roller groove bottom 5a and the inner race outer cylindrical surface 6a as shown by the solid line in FIG. When the speed ratio exceeds a predetermined value and the stator 1 starts idling, the outer race 4
Since the roller 14 idles in the direction of the arrow in the figure, the centrifugal force causes the roller 14 to compress the leaf spring 9 to the 14- state and keep the one-way clutch 2 in the unlocked state. (Effects of the Invention) As explained above, in the present invention Since the roller 14 is guided by the recess 15 of the retainer 11, the roller 14
The amount of movement of is regulated, the leaf spring 9 is only compressed by an amount corresponding to the gap G, and the leaf spring 9 is no longer in close contact (total compression).
Breakage of the leaf spring 9 can be reliably prevented. Moreover, since both ends of the roller 14 are fitted into the four parts 15, the chamfered parts C at both ends of the roller no longer face the roller groove bottom 5a and the inner race outer cylindrical surface 6a.
4 can be pressed over the entire length of the roller groove bottom 5a1 and the inner race outer cylindrical surface 6a, so that the entire length of the roller 14 is effectively utilized, and the effective length of the roller 14 is substantially increased. For this reason, a one-way clutch of the same size will have significantly increased torque capacity. Furthermore, since both ends of the row 514 are supported by the recesses 15, the roller 14 is less likely to tilt with respect to the torque converter center line B, and local deformation of the leaf spring 9 from this blood is prevented, improving durability. do.

Note that when embodying the present invention, the outer race 4 may be formed integrally with the central hub portion of the stator 1. Further, the roller groove 5 can also be provided on the inner race 6 side. The recess 15 does not need to be circular, and specifically may be arcuate.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of a torque converter to which the present invention is applied, Fig. 2 is a front view of the retainer, Fig. 3 is a longitudinal sectional view of the retainer, and Fig. 4 is a schematic cross-sectional view (X 5 is a longitudinal sectional view showing an example of a conventional structure, and FIGS. 6 and 7 are a front view and a longitudinal sectional view of the retainer in FIG. 5. DESCRIPTION OF SYMBOLS 1... Stator, 2... One-way clutch, '4... Outer race, 5... Roller groove, 6... Inner race, 9... Leaf spring, 11...
...retainer, 14...roller, 15...recess, G
···gap

Claims (2)

[Claims] (1) In a torque converter in which the outer race of the one-way clutch and the retainers on both sides of the one-way clutch are both fixed to the stator, and a roller and a leaf spring for returning the roller are arranged in the roller groove between the outer race and the inner race, both retainers are fixed to the stator. A torque torque system characterized in that both ends of the roller are provided with recesses into which they are fitted across a gap in the radial direction of the roller, and the gap is reduced so that the leaf spring is not fully compressed when the roller moves to the non-locking end within the gap. One-way clutch mechanism of converter. (2) The one-way clutch mechanism for a torque converter according to claim 1, wherein the roller is provided with chamfered portions at both ends, and the chamfered portions are made smaller in depth than the recessed portions.