JPS63289336A - One-way clutch - Google Patents

Abstract

PURPOSE:To aim at the promotion of lightweightness and down and make an outer ring narrower as well as to simplify its axial location by forming at least either side of an inner ring or the outer ring and an engaged piece to be engaged in the axial direction both in a cage. CONSTITUTION:Four rectangular engaged pieces 18 are formed in a part of one side flange part 17a corresponding to each column part 16b between two pockets 16a installed at a fixed interval in the circumferential direction of a cage 16 at a constant pitch along the circumferential direction. In this connection, an outer diameter of the engaged piece 18 is titled outward aslant, made smaller than an inner diameter of an outer ring 11 before being built-in, but larger than the inner diameter of the outer ring 11 after being built-in, and it should be set to be almost the same diameter as an outer diameter of another flange part 17b. An assembly of this cage 16 is inserted into the outer ring 11 and, after the flange part 17b is engaged with a circumferential step part 11a, the engaged piece 18 is erected and engaged with the other side circumferential step part 11a. Accordingly, it is made lighter in weight, cost is reduced and, what is more, width of the outer ring can be narrowed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a one-way clutch, and more specifically, a number of sprags are arranged between an inner ring and an outer ring that are arranged concentrically, and a wedge of these sprags is used. This function causes irreversible rotational transmission between the inner and outer rings, and is suitable for use in, for example, automatic transmissions and starters of automobiles.

<Prior art> This type of one-way clutch is shown in FIGS. 9 and 1, for example.
As shown in Figure 0, a large number of sprags 3.3. is inserted into a window formed in an annular retainer 4 and held in a swingable manner, and sprags 3° 3, . Only when the inner ring 1 rotates in the meshing direction shown by the arrow in FIG. 11, the outer ring 2 is rotated in the same direction.

The one-way clutch mentioned above needs to be positioned in the axial direction, but since the one-way clutch itself does not have a positioning means,
As shown in the figure, one end of a plate 6.6 is caulked and fixed to both sides of the outer ring 2, and these plates 6.6 are extended to both sides of the gap between the inner ring 1 and the outer ring 2, and the shafts of the retainer 4 and the ribbon spring 5 are The direction is determined.

<Problems to be Solved by the Invention> According to the conventional structure described above, separate members such as the plate 6.6 are required, and the process of fixing the plate 6.6 to the outer ring 2 is increased, resulting in high cost. become. Furthermore, since the outer ring 2 is guided by plates 6.6 on both sides at intervals equal to the axial length of the outer ring 2, the width of the retainer 4 becomes wider.
．． Since the width of 6 is added, there were problems such as the width of the one-way clutch attachment part becoming wider.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a one-way clutch that can perform axial positioning without using a positioning plate, reduce costs, and reduce the width of the outer ring.

<Means for Solving the Problems> In order to achieve the object 2, the structure of the present invention is to provide a retainer that holds a large number of sprags between the inner ring and the outer ring. It is characterized by forming a locking piece that locks in the axial direction with at least one of the two.

<Operation> When the retainer, spring, and sprag are assembled between the inner and outer rings, the locking pieces of the retainer are engaged with the inner ring or the outer ring in the axial direction, allowing easy axial positioning. Therefore, no special locking member is required.

<Example> Hereinafter, the present invention will be explained in detail with reference to an illustrated example.

In Fig. 1, II has the same step part +1a on both sides of the inner periphery.
an outer ring forming Ila, I2 a rotating shaft, 14 a circumference between the outer ring II and the rotating shaft 12, sprags arranged at equal intervals; 15 a spring biasing the sprag 14 in one direction; 16 is a ring-shaped retainer that retains the sprag 14.

2. The retainer 16 has a plurality of pockets 16a at regular intervals along the circumferential direction, as shown in FIG. 2(a).
It forms l 6a,. At both ends of the cage 16, as shown in FIGS. 2(b) and 2(c), flange portions 17a and 17b are formed which protrude outward in the radial direction, and the outer diameter of one flange portion +7a is smaller than the inner diameter of 11,
The outer diameter of the other collar portion +7b is larger than the inner diameter of the outer ring 11 and smaller than the inner diameter of the bracket step portion 11a.

” - Pocket I 6a, I 6a.

Four rectangular locking pieces 18, 18, 18, 18 are formed at a constant pitch along the circumferential direction on the part of one of the collar parts 17a corresponding to the pillar parts 16b, I 6b, . . . are doing. Before the one-way clutch is assembled, the one-way locking piece 18 is inclined obliquely outward as shown in FIG. As shown in FIG. 2, the outer diameter of the locking piece 18 is larger than the inner diameter of the outer ring II, and is approximately the same as the outer diameter of the other tail portion +7b. As shown in FIGS. 2(b) and 2(c), the portion 20 that extends from the locking piece 18 to one of the collar portions 17a,
The arc-shaped notch prevents stress concentration from occurring when the locking piece 18 is bent.

A - direction clutch using such a retainer 16 is installed as shown in FIGS. 3(a) and 3(b).

Pockets 16a, 16a, of retainer 16,
and spring 15 with sprag +4.14.・Insert the Azo assembly fitted into the outer ring II from one tail +7a, and after locking the other tail +7b to one of the same step parts 11a, raise the locking pieces 18.18゜18.18. It is locked to the other same step portion 11a to perform axial positioning.

In this way, the one-way clutch is positioned in the axial direction by raising the locking pieces 18 of the retainer 16, so there is no need to use a special plate for positioning, and the weight can be reduced, and the process of attaching the plate can be simplified. This can reduce costs. In addition, the outer ring 1 is used for the positioning plate.
There is no need to increase the width of the outer ring 11, and the width of the outer ring 11 can be reduced.

FIGS. 4(a), 4(b) and 4(c) show sectional views of a modification of the previous embodiment. The difference between this modification and the previous embodiment is that a circumferential protrusion 22 protruding inward is formed at the end of the inner periphery 21a of the outer ring 21;
This is the point where the recess 23 is formed between the points a. After fitting the sprag 27 into the retainer 25 and spring 26,
The locking piece 24 of the retainer 25 is assembled into the outer ring 21, and the locking piece 24 is pressed against the end surface 22a of the circumferential projection 22 to stand up.
The locking piece 24 is engaged with the recess 23 to perform axial positioning. In this case, the concave portions 23 are formed by enlarging the relief portions formed when the inner circumferential surface 2+a of the outer ring 21 is ground, so that the four portions 23 can be easily processed.

FIGS. 5(a) and 5(b) show cross-sectional views of another modification.

In this modification, the retainer 33 is attached to the - side of the outer ring 3I.
1- Pressurize the lf432 with a width slightly smaller than the width of the piece 35 at a constant pinotge, and lock the locking piece 35 in this groove 32 to eliminate relative circumferential movement between the outer ring 31 and the retainer 33. ,
The outer ring 31, the retainer 33, the sprags 36 and the spring 37 move in unison. In this case, since the outer ring 31, retainer 33, and sprag 36 move together, it is possible to ensure engagement during sudden deceleration and acceleration. It's easy to do.

FIGS. 6(a) and 6(b) show cross-sectional views of roughly another modification. In this modification, link-shaped plays 1-42 and 42 are caulked and fixed to both sides of the outer ring 41.

The same members as those shown in FIGS. 5(a) and 5(b) are given the same reference numerals and their explanations will be omitted.

FIG. 7 shows a sectional view of yet another modification, and FIG. 8 shows an assembled sectional view of this modification. In this modification, an outer ring 53 is fixed to a stepped portion 52 provided in a housing 51.
This fixation is achieved by screwing a bolt (not shown) that passes through a through hole 55 provided in the outer ring 53 into a screw hole 56. A notched stepped portion 57 is formed at the end of the outer ring 53 on the housing side and on the inner peripheral side. -1- A one-way rod 60 consisting of a retainer 61, a spring 62, and a sprag 63 is disposed between the outer ring 53 and the rotating shaft I2. As shown in FIG. 8, a curved portion 58 having elasticity that curves outward in the radial direction from the axial direction is formed at the end of the retainer 6I on the side of the hose song 5I! 1ro. The axial dimension B of this curved portion 58 is set to be larger than the axial dimension τ of the notched stepped portion 57 of the outer ring 53 measured by A. Therefore, as shown in FIG.
The curved portion 58 is elastically deformed when fixed to the retainer 6
1 is fixed to the outer ring 53. Note that the curved portions 58 may be in the shape of a tongue piece provided separately in the circumferential direction, or may be in the shape of a flan.

In the one-way clutch 60 configured as shown in FIG.
is fixed in the axial and circumferential direction against the
Since the directional clutch 60 is fixed to the outer ring 53 and the housing 51, the outer ring 53 and the unidirectional clutch 60 rotate in the same direction and there is no relative rotation difference, which reduces wear on the outer cam of the spragg 63. It can be prevented and the outer ring 5
3 and the sprag 63 can be prevented from shifting in timing.

<Effects of the Invention> As is clear from the explanation below, the one-way lathe of the present invention has a retainer formed with a locking piece that locks at least one of the inner ring or the outer ring in the axial direction. Since there is no need to use a separate plate for axial positioning as in the conventional example, it is possible to reduce weight and cost, the width of the outer ring can be narrowed, and the locking piece of the retainer can be reduced. By connecting the inner ring or outer ring, axial positioning can be easily performed.

18 =

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
) is a sectional view of the cage, FIG. 2(b) is an enlarged view showing the locking piece of the cage, FIG. 2(c) is a side view of the cage, and FIG. 3(
a) and (b) are one-way clutch assembly diagrams, 4th
Figures (a), (b), and (c) show a modified example; Figures 5 (a) and (b) show another modified example; and Figure 6 (a), (b). is a diagram showing another modification, FIGS. 7 and 8 are diagrams showing still another modification, and FIGS. 9 and 10 are diagrams 4-4 showing a conventional example. 11...Outer ring, 12...Inner ring, 14...Sprag,
16...retainer, 18 locking piece. Patent applicant: Koyo Seiko Co., Ltd. Agent
Patent Attorney Aoyama Aoyama and 2 others Figure 7 Figure 8 Figure 10

Claims (1)

[Claims] (1) In a one-way clutch in which a large number of sprags are held by an annular cage between an inner ring and an outer ring and arranged at intervals in the circumferential direction, at least one of the inner ring or the outer ring is attached to the cage. A one-way clutch characterized by forming a locking piece that locks in the axial direction.