JP7275971B2 - one way clutch - Google Patents

Description

The present invention relates to one-way clutches.

The one-way clutch is held by a plurality of sprags provided between an outer ring member and an inner ring member, an annular retainer for retaining the plurality of sprags at intervals in the circumferential direction, and the retainer. and an annular spring for resiliently pushing each sprag.

For example, when the outer ring member rotates in one direction with respect to the inner ring member, the sprags engage with the outer ring member and the inner ring member to enable power transmission between the two members, and the outer ring member and the inner ring member rotate together (this is called referred to as the “locked state”). On the other hand, when the outer ring member rotates in the other direction with respect to the inner ring member, the engagement is released and the power transmission is interrupted, causing the outer ring member to idle with respect to the inner ring member (this is called a "free state"). .). A spring pushes the sprag in the direction in which said engagement is achieved. A one-way clutch is disclosed in US Pat.

JP 2016-186318 A

FIG. 9 is a perspective view showing part of a spring 90 of a conventional one-way clutch. The spring 90 has a pair of annular ribs 91 , 91 , a plurality of pillars 92 connecting the ribs 91 , 91 , and tongues 94 extending from the pillars 92 in the circumferential direction. A pocket 95 is formed between the pair of rib portions 91 and 91 and between the pillar portions 92 and 92 adjacent in the circumferential direction.

As shown in FIG. 10, retainer 99 is also formed with pockets 96 for accommodating sprags 93 . A tongue portion 94 of the spring 90 contacts the sprag 93 housed in the pockets 95 and 96 and elastically pushes the sprag 93 .

In a one-way clutch having such a spring 90, the spring 90 is provided on the inner peripheral side of the retainer 99 during assembly, and the retainer 99 and the spring 90 are set (set). In the set state, the sprags 93 are pushed into the pockets 95,96. At that time, the sprag 93 is pushed into the pockets 95 and 96 while deforming the tongue portion 94 of the spring 90 . Therefore, the tongue portion 94 may be plastically deformed beyond the elastic region.

If the tongue portion 94 is plastically deformed, the sprag 93 is not properly pushed by the tongue portion 94 in the one-way clutch. As a result, the sprag 93 does not get caught between the inner ring member 98 and the outer ring member 97, or the timing of getting caught is delayed. In this case, the torque transmission capacity of the one-way clutch is reduced, or the one-way clutch is partially worn out, shortening the life of the one-way clutch.

In the one-way clutch as described above, the tongue portion 94 is hidden by the retainer 99 and the rib portion 91 of the spring 90, as shown in FIG. Therefore, even if the tongue portion 94 is plastically deformed, it is difficult to find it.

SUMMARY OF THE INVENTION Accordingly, an object of the present disclosure is to provide a one-way clutch that enables easy detection of plastic deformation of the tongue.

A one-way clutch of the present disclosure includes: a plurality of sprags provided between an outer ring member and an inner ring member; an annular cage for holding the plurality of sprags at intervals in the circumferential direction; an annular spring disposed radially inward for elastically pushing the sprags;
The spring includes a pair of annular ribs, a plurality of pillars connecting the pair of ribs, and a thin plate extending from the pillars in the circumferential direction and contacting the sprags to elastically press the sprags. having a tongue and
The tongue portion has a curved portion that is convex and curved radially outward from the column portion, and a tip that extends from the curved portion toward the sprag and contacts the sprag. death,
In a state in which the tongue portion is in the elastic region, the apex of the curved portion on the convex side is positioned radially outward of the outer peripheral surface of the retainer, and the apex of the curved portion on the concave side is located on the holding side. Located radially inward from the outer peripheral surface of the vessel,
When the tongue portion is in the plastic region, the apex of the curved portion on the concave surface side is positioned radially outward from the outer peripheral surface of the retainer.

According to the one-way clutch, the outer peripheral surface of the retainer serves as a reference surface for checking whether or not the tongue portion is plastically deformed. That is, after the one-way clutch is assembled and before it is provided between the outer ring member and the inner ring member, if the tongue portion is elastically deformed but not plastically deformed, the convex side of the curved portion is positioned radially outward from the outer peripheral surface of the retainer, and the concave-side vertex of the curved portion is positioned radially inward from the outer peripheral surface of the retainer. Therefore, when the one-way clutch is viewed from the axial direction before it is provided between the outer ring member and the inner ring member, a gap is generated between the apex of the curved portion on the concave side and the outer peripheral surface of the retainer. I can't see the gap.
On the other hand, when the tongue portion is plastically deformed, the apex of the curved portion on the concave side is positioned radially outward of the outer peripheral surface of the retainer. Therefore, in a state before the one-way clutch is provided between the outer ring member and the inner ring member, when the one-way clutch is viewed from the axial direction, there is a gap between the apex of the curved portion on the concave side and the outer peripheral surface of the retainer. I can see the gap between them.
As described above, it is possible to inspect whether or not the tongue is plastically deformed by visually observing from the axial direction, and the inspection is easy.

In addition, when sprags are attached to the retainer and the radially inner spring from the radially outer side, the sprags may push the tongue portion radially inward, resulting in plastic deformation of the tongue portion. There is Therefore, preferably, when the tongue portion is in the elastic region, the radial position of the tip portion is in the range between the outer peripheral surface of the retainer and the inner peripheral surface of the retainer, and the tongue The spring is configured such that when the piece is in the plastic region, the tip is located radially inward of the inner peripheral surface of the retainer.
In this case, the inner peripheral surface of the retainer serves as a reference surface for checking whether or not the tongue portion is plastically deformed.

Another one-way clutch of the present disclosure includes: a plurality of sprags provided between an outer ring member and an inner ring member; an annular retainer for retaining the plurality of sprags at intervals in the circumferential direction; an annular spring provided radially inward of the retainer for elastically pushing the sprags;
The spring includes a pair of annular ribs, a plurality of pillars connecting the pair of ribs, and a tongue extending circumferentially from the pillars and contacting the sprags to elastically press the sprags. and
The tongue portion has a curved portion that is convex and curved radially outward from the column portion, and a tip that extends from the curved portion toward the sprag and contacts the sprag. death,
The apex of the curved portion on the convex surface side is located radially inward from the outer peripheral surface of the retainer when the tongue portion is in the elastic region, and when the tongue portion is in the plastic region, the holding It is positioned radially outward from the outer peripheral surface of the vessel.

According to the one-way clutch, the outer peripheral surface of the retainer serves as a reference surface for checking whether or not the tongue portion is plastically deformed. That is, after the one-way clutch is assembled and before it is provided between the outer ring member and the inner ring member, if the tongue portion is elastically deformed but not plastically deformed, the convex side of the curved portion is positioned radially inward from the outer peripheral surface of the retainer. Therefore, when the one-way clutch is viewed from the axial direction before the one-way clutch is provided between the outer ring member and the inner ring member, the apex of the convex side of the curved portion extends radially outward from the outer peripheral surface of the retainer. It does not protrude and cannot be seen.
On the other hand, when the tongue portion is plastically deformed, the vertex of the curved portion on the convex surface side is positioned radially outward of the outer peripheral surface of the retainer. Therefore, when the one-way clutch is viewed from the axial direction before it is provided between the outer ring member and the inner ring member, the apex of the convex side of the curved portion is positioned radially outward from the outer peripheral surface of the retainer. It sticks out and is visible.
As described above, it is possible to inspect whether or not the tongue is plastically deformed by visually observing from the axial direction, and the inspection is easy.

Further, regarding this one-way clutch, when sprags are attached to the retainer and the radially inner spring from the radially outer side, the sprags push the tongue portion radially inward, and the tongue portion is plastically deformed. It may deform. Therefore, preferably, when the tongue portion is in the elastic region, the radial position of the tip portion is in the range between the outer peripheral surface of the retainer and the inner peripheral surface of the retainer, and the tongue The spring is configured such that when the piece is in the plastic region, the tip is located radially inward of the inner peripheral surface of the retainer.
In this case, the inner peripheral surface of the retainer serves as a reference surface for checking whether or not the tongue portion is plastically deformed.

Further, still another one-way clutch of the present disclosure includes a plurality of sprags provided between an outer ring member and an inner ring member, and an annular retainer for holding the plurality of sprags spaced apart in the circumferential direction. an annular spring provided radially inward of the retainer for elastically pushing the sprags;
The spring includes a pair of annular ribs, a plurality of pillars connecting the pair of ribs, and a tongue extending circumferentially from the pillars and contacting the sprags to elastically press the sprags. and
The tongue portion has a curved portion that is convex and curved radially outward from the column portion, and a tip that extends from the curved portion toward the sprag and contacts the sprag. death,
When the tongue portion is in the elastic region, the radial position of the tip portion is in the range between the outer peripheral surface of the retainer and the inner peripheral surface of the retainer,
When the tongue portion is in the plastic region, the tip portion is located radially inward of the inner peripheral surface of the retainer.

According to the one-way clutch, the inner peripheral surface of the retainer serves as a reference surface for checking whether or not the tongue portion is plastically deformed. That is, after assembling the one-way clutch and before being provided between the outer ring member and the inner ring member, if the tongue piece is elastically deformed but not plastically deformed, the radial direction of the tip is The position is in the range between the outer peripheral surface of the cage and the inner peripheral surface of the cage. Therefore, when the one-way clutch is viewed from the axial direction before it is provided between the outer ring member and the inner ring member, the tips of the tongue pieces are hidden behind the retainer and cannot be seen.
On the other hand, when the tongue portion is plastically deformed, the tip portion of the tongue portion is positioned radially inward of the inner peripheral surface of the retainer. Therefore, when the one-way clutch is viewed from the axial direction before it is provided between the outer ring member and the inner ring member, the tips of the tongue pieces extend radially inward from the inner peripheral surface of the retainer. protruding and visible.
As described above, it is possible to inspect whether or not the tongue is plastically deformed by visually observing from the axial direction, and the inspection is easy.

According to the one-way clutch of the present invention, it is possible to easily detect when the tongue is plastically deformed.

It is a side view which shows an example of a one-way clutch. It is explanatory drawing which expands and shows a part of one-way clutch. It is a perspective view which shows some springs. FIG. 4 is an axial view of the one-way clutch before it is provided between the outer ring member and the inner ring member; FIG. 4 is an axial view of the one-way clutch before it is provided between the outer ring member and the inner ring member; FIG. 4 is an axial view of the one-way clutch before it is provided between the outer ring member and the inner ring member; FIG. 4 is an axial view of the one-way clutch before it is provided between the outer ring member and the inner ring member; FIG. 4 is an explanatory diagram of a tongue portion; FIG. 3 is a perspective view showing part of a spring included in a conventional one-way clutch; It is explanatory drawing which expands and shows a part of conventional one-way clutch.

[Construction of one-way clutch]
FIG. 1 is a side view showing an example of a one-way clutch. FIG. 2 is an explanatory diagram showing an enlarged part of the one-way clutch. A one-way clutch 1 of the present disclosure comprises a plurality of sprags 2 , an annular retainer 3 and an annular spring 4 . In the one-way clutch 1 of the present disclosure, the direction parallel to the centerline C of the one-way clutch 1 is referred to as the "axial direction." The direction around the center line C is called the "circumferential direction", and the radial direction of the one-way clutch 1 is called the "radial direction".

A plurality of sprags 2 are provided between the outer ring member 5 and the inner ring member 6, and all the sprags 2 have the same shape. The outer ring member 5 and the inner ring member 6 are annular members. The outer ring member 5 is integrated with an outer member (not shown), and the inner ring member 6 is integrated with a shaft member (not shown). The outer member and the shaft member rotate relatively, thereby allowing the outer ring member 5 and the inner ring member 6 to rotate relatively. The outer ring member 5 may be a part of the outer member, and the inner ring member 6 may be a part of the shaft member.

1 and 2 show a state in which the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6. FIG. However, as will be described later, the inspection as to whether or not a part (tongue portion 43) of the spring 4, which is a constituent member of the one-way clutch 1, is plastically deformed is performed by This is done in a state before being provided between the member 6 (see FIG. 4).

The retainer 3 retains the plurality of sprags 2 at intervals in the circumferential direction. In FIG. 2 , the retainer 3 has annular portions 31 located on both axial sides of the sprag 2 and a plurality of pillars 32 connecting the annular portions 31 . A region formed between the annular portions 31 on both sides in the axial direction and between the pillar portions 32 adjacent in the circumferential direction serves as a pocket 33 for accommodating the sprag 2 . The retainer 3 has a flange portion 34 integral with the annular portion 31 . The flange portion 34 (see FIG. 1) has an annular shape and is fitted to the inner peripheral surface of the outer ring member 5 , whereby the retainer 3 is attached to the outer ring member 5 .

The spring 4 is annular and provided radially inward of the retainer 3 . In the present disclosure, spring 4 is provided along inner peripheral surface 12 of retainer 3 . As shown in FIG. 3, the spring 4 is constructed by forming a thin belt-like member 40 made of metal into a ring. One end portion 50 and the other end portion 60 of the belt-shaped member 40 are overlapped to form the belt-shaped member 40 in a ring shape.

The spring 4 has a pair of annular ribs 41 , 41 , a plurality of pillars 42 connecting the pair of ribs 41 , 41 , and tongues 43 extending from each pillar 42 in the circumferential direction. Each of the rib portion 41, the column portion 42, and the tongue piece portion 43 has a thin plate shape. The pair of rib portions 41 , 41 are located on both axial sides of the sprag 2 . A region formed between the pair of rib portions 41 and 41 and between the pillar portions 42 and 42 adjacent in the circumferential direction serves as a pocket 49 for accommodating the sprag 2 . As shown in FIG. 2, the tongue portion 43 contacts the pocket 49 of the sprag 2 and a portion of the sprag 2 accommodated in the pocket 33 of the retainer 3, and the tongue portion 43 elastically pushes the sprag 2. .

In the one-way clutch 1 (see FIG. 1) having the above configuration, when the outer ring member 5 rotates in one direction (counterclockwise direction in FIG. 1) with respect to the inner ring member 6, the sprags 2 are engaged with the outer ring member 5 and the inner ring. It bites into the member 6. Then, power can be transmitted between the outer ring member 5 and the inner ring member 6, and the outer ring member 5 and the inner ring member 6 rotate integrally (this is called a "locked state"). On the other hand, when the outer ring member 5 rotates in the other direction (clockwise direction in FIG. 1) with respect to the inner ring member 6, the biting is released. Then, power transmission between the outer ring member 5 and the inner ring member 6 is interrupted, and the outer ring member 5 idles with respect to the inner ring member 6 (this is called a "free state").

The tongue portion 43 of the spring 4 elastically pushes (biases) the sprag 2 in the direction in which the sprag 2 is engaged. As shown in FIGS. 2 and 3 , the tongue portion 43 has a curved portion 21 and a tip portion 22 . The curved portion 21 is a curved portion that protrudes radially outward from the column portion 32 . The tip portion 22 is a portion that extends from the curved portion 21 toward the sprag 2 and contacts the sprag 2 .

4 is an axial view of the one-way clutch 1 before being provided between the outer ring member 5 and the inner ring member 6. FIG. Spring 4 is provided along inner peripheral surface 12 of retainer 3 . A sprag 2 is attached to the pocket 33 of the retainer 3 and the pocket 49 of the spring 4 . A tongue portion 43 of the spring 4 can come into contact with a portion of the sprag 2 . As shown in FIG. 2, when the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, the tongue piece 43 contacts the sprag 2 and is elastically deformed.

In FIG. 4, the sprags 2 are attached to the retainer 3 and the springs 4 on the radially inner side thereof from the radially outer side. At this time, the sprag 2 pushes the tongue portion 43 radially inward, and the tongue portion 43 as a whole deforms radially inward as indicated by arrow F1 in FIG. Furthermore, when the sprags 2 are attached to the retainer 3 and the springs 4 radially inward thereof from the radially outer side, the wide portions of the sprags 2 also push the tongue portions 43 in the circumferential direction. . As a result, as indicated by an arrow F2 in FIG. 8, the tongue portion 43 is deformed so as to be compressed along the circumferential direction. When the tongue portion 43 is deformed so as to be compressed along the circumferential direction, the curved portion 21 may be deformed so as to become higher radially outward. FIG. 8 is an explanatory diagram of the tongue portion 43. The tongue portion 43 before deformation is indicated by a two-dot chain line, and the tongue portion 43 after deformation is indicated by a solid line.

In FIG. 4, in the one-way clutch 1, a spring 4 is provided on the inner peripheral side of the retainer 3 during assembly, and the retainer 3 and the spring 4 are set (set). The sprags 2 are pushed into the pockets 33, 49 in the set state. At that time, the sprag 2 is pushed into the pockets 33 and 49 while deforming the tongue portion 43 of the spring 4 . Therefore, the tongue portion 43 may be plastically deformed beyond the elastic region.

When the sprag 2 is attached, the tongue 43 in FIG. 4 is elastically deformed and not plastically deformed. On the other hand, when the sprag 2 is attached, the tongue portion 43 shown in FIGS. 5 and 6 is plastically deformed beyond the elastic region due to the application of an unreasonable load. When the sprag 2 is attached, the tongue portion 43 of FIG. 5 is strongly pushed in the circumferential direction by the sprag 2 as indicated by the arrow F2 in FIG. It is plastically deformed. When the sprag 2 is attached, the tongue portion 43 shown in FIG. 6 is strongly pushed radially inward by the sprag 2 as indicated by the arrow F1 in FIG. deformed.

In each one-way clutch 1 of the present disclosure, the state in which the tongue portion 43 is elastically deformed, that is, the state in which the tongue portion 43 is in the elastic region is when the sprag 2 is removed from the pocket 49. The shape of the tongue portion 43 is the same shape as before the sprag 2 was attached to the pocket 49 . In other words, the state in which the tongue portion 43 is elastically deformed, that is, the state in which the tongue portion 43 is in the elastic region means that when the sprag 2 is removed from the pocket 49, the shape of the tongue portion 43 changes from the design. It refers to the case where the shape of the base is as follows.

On the other hand, the state in which the tongue portion 43 is plastically deformed, that is, the state in which the tongue portion 43 is in the plastic region means that when the sprag 2 is removed from the pocket 49, the shape of the tongue portion 43 changes. , the shape of which is different from that before the sprag 2 is attached to the pocket 49 . In other words, the state in which the tongue portion 43 is plastically deformed, that is, the state in which the tongue portion 43 is in the plastic region means that when the sprag 2 is removed from the pocket 49, the shape of the tongue portion 43 changes from the design. It refers to the case where the shape of the base is different from that of the street.

[Regarding Configuration for Inspection of Tongue Portion 43]
In FIG. 4, the curved portion 21 of the tongue portion 43 extends radially outward from the column portion 42, curves radially outwardly, and further extends radially inward. It is the part where The curved portion 21 is in the shape of a thin plate and has an apex 21a on the convex side and an apex 21b on the concave side. The apex 21 a on the convex side is the apex on the radially outer surface of the top of the curved portion 21 . The apex 21 b on the concave side is the apex on the radially inner surface of the top of the curved portion 21 .

The positional relationship between the apexes 21a and 21b of the curved portion 21 and the retainer 3 (the outer peripheral surface 11 and the inner peripheral surface 12) described below is the relationship when the sprags 2 are accommodated in the pockets 33 and 49. . This state is hereinafter referred to as the "assembled state". The assembled state is a state before the sprag 2 , retainer 3 and spring 4 are integrated and mounted between the outer ring member 5 and the inner ring member 6 .

[First form]
As shown in FIG. 4 , when the tongue portion 43 is in the elastic region, the apex 21 a of the curved portion 21 on the convex side is located radially outward of the outer peripheral surface 11 of the retainer 3 . A vertex 21 b on the concave surface side of the curved portion 21 is positioned radially inward from the outer peripheral surface 11 of the retainer 3 . Therefore, when the one-way clutch 1 is viewed from the axial direction before the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, the tongue portion 43 in the elastic region is curved. A gap is not formed between the vertex 21b on the concave side of the portion 21 and the outer peripheral surface 11 of the retainer 3, and the gap is invisible.

On the other hand, as shown in FIG. 5, when the tongue portion 43 is in the plastic region, that is, when the tongue portion 43 is plastically deformed, the apex 21b on the concave surface side of the curved portion 21 is in contact with the retainer. It is positioned radially outward of the outer peripheral surface 11 of 3 . Therefore, in a state before the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, when the one-way clutch 1 is viewed from the axial direction, the apex 21b on the concave side of the curved portion 21 and the outer peripheral surface of the retainer 3 are aligned. 11 and a gap e is generated, and the gap e can be seen. That is, the inspector can determine that the tongue portion 43 is plastically deformed when the gap e is visible when the one-way clutch 1 is viewed from the axial direction.

Thus, according to the one-way clutch 1 of the first embodiment, the outer peripheral surface 11 of the retainer 3 serves as a reference surface for checking whether the tongue portion 43 is plastically deformed. By visually observing the one-way clutch 1 from the axial direction, it is possible to inspect whether or not the tongue portion 43 is plastically deformed, and the inspection is easy.

[Second form]
It is also possible to inspect whether or not the tongue portion 43 is plastically deformed according to a criterion different from that of the first embodiment.
7A and 7B are explanatory diagrams of a case where an inspection is performed on whether or not the tongue portion 43 is plastically deformed according to a criterion different from that of the first embodiment. 7 is an axial view of the one-way clutch 1 before being provided between the outer ring member 5 and the inner ring member 6, as in FIG. The shape of the tongue portion 43 is slightly different between the spring 4 shown in FIG. 7 and the spring 4 shown in FIG.

When the sprag 2 is attached, the tongue portion 43 shown in FIG. 7 is elastically deformed and not plastically deformed.

As shown in FIG. 7 , when the tongue portion 43 is in the elastic region, the apex 21 a of the curved portion 21 on the convex side is positioned radially inward from the outer peripheral surface 11 of the retainer 3 . A vertex 21b on the concave surface side of the curved portion 21 is also positioned radially inward from the outer peripheral surface 11 of the retainer 3 . Therefore, when the one-way clutch 1 is viewed from the axial direction before the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, the tongue portion 43 in the elastic region is A vertex 21a on the convex surface side of the curved portion 21 does not protrude radially outward from the outer peripheral surface 11 of the retainer 3 and cannot be seen.

On the other hand, as shown in FIG. 5, when the tongue portion 43 is in the plastic region, that is, when the tongue portion 43 is plastically deformed, the vertex 21a on the convex surface side of the curved portion 21 is in contact with the retainer. It is positioned radially outward of the outer peripheral surface 11 of 3 . Therefore, when the one-way clutch 1 is viewed from the axial direction before being provided between the outer ring member 5 and the inner ring member 6 , the apex 21 a on the convex surface side of the curved portion 21 is aligned with the outer circumference of the retainer 3 . It protrudes radially outward from the surface 11 and can be seen. That is, when the inspector sees the one-way clutch 1 from the axial direction, even if at least a part of the top portion of the curved portion 21 appears to protrude from the outer peripheral surface 11 side of the retainer 3, the inspector finds that the tongue portion 43 is plastic. can be determined to be deformed.

Thus, according to the one-way clutch 1 of the second embodiment, the outer peripheral surface 11 of the cage 3 serves as a reference surface for checking whether the tongue portion 43 is plastically deformed. By visually observing the one-way clutch 1 from the axial direction, it is possible to inspect whether or not the tongue portion 43 is plastically deformed, and the inspection is easy.

[First form and second form]
In each of the first configuration (FIG. 4) and the second configuration (FIG. 7), the curved portion of the tongue portion 43 is inspected for plastic deformation of the tongue portion 43 as described above. It is more preferable to pay attention to the tip portion 22 of the tongue portion 43 as well as to pay attention to 21 .
As described above, when the sprags 2 are attached to the retainer 3 and the radially inner spring 4 from the radially outer side, the sprags 2 push the tongue portions 43 radially inward, and the arrows in FIG. As indicated by F1, the tongue portion 43 may be plastically deformed.

Therefore, as shown in each of the first embodiment (FIG. 4) and the second embodiment (FIG. 7), when the tongue portion 43 is in the elastic region, the radial position of the tip portion 22 is equal to that of the retainer 3. and the inner peripheral surface 12 of the retainer 3. In the state before the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, when the one-way clutch 1 is viewed from the axial direction, the tongue portion 43 in the elastic region (Figs. 7), the tip portion 22 of the tongue portion 43 is hidden by the retainer 3 and cannot be seen.

On the other hand, as shown in FIG. located radially inward of the Therefore, when the one-way clutch 1 is viewed from the axial direction before the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, the tip portion 22 of the tongue portion 43 is It protrudes radially inward from the inner peripheral surface 12 of the retainer 3 and can be seen. That is, when the inspector sees the one-way clutch 1 from the axial direction and the front end portion 22 of the tongue portion 43 protrudes from the inner peripheral surface 12 of the retainer 3, the tongue portion 43 is plastically deformed. can be determined.

In this manner, by visually observing the tip portion 22 of the tongue portion 43 from the axial direction together with visually observing the curved portion 21 of the tongue portion 43 from the axial direction, the tongue portion 43 is plastically deformed. It is possible to inspect whether or not there is any.

[Third form]
In each of the first embodiment (FIG. 4) and the second embodiment (FIG. 7), by focusing on the curved portion 21 of the tongue portion 43, it is possible to inspect whether the tongue portion 43 is plastically deformed. done. On the other hand, in the third mode, the front end portion 22 of the tongue portion 43 is examined regardless of the curved portion 21 of the tongue portion 43 to check whether the tongue portion 43 is plastically deformed. may be performed.

That is, as shown in FIGS. 4 and 7, when the tongue portion 43 is in the elastic region, the radial position of the tip portion 22 is aligned with the outer peripheral surface 11 of the retainer 3 and the inner peripheral surface 12 of the retainer 3. in the range between On the other hand, as shown in FIG. 6 , if the tongue portion 43 is plastically deformed, that is, if the tongue portion 43 is in the plastic region, the tip portion 22 will move toward the inner peripheral surface 12 of the retainer 3 . located radially inward of the

As shown in FIG. 6, when the tongue portion 43 is plastically deformed, the apex 21a on the convex surface side of the curved portion 21 is positioned radially inward from the outer peripheral surface 11 of the retainer 3. The tip portion 22 may be positioned radially inward of the inner peripheral surface 12 of the retainer 3 . Even in this case, when it is confirmed that the tip portion 22 is positioned radially inward of the inner peripheral surface 12 of the retainer 3, the tongue portion 43 including the tip portion 22 is It is judged to be plastically deformed.

As described above, in the state before the one-way clutch 1 is provided between the outer ring member 5 and the inner ring member 6, when the one-way clutch 1 is viewed from the axial direction, it is elastically deformed and not plastically deformed. The radial position of the tip portion 22 of the tongue portion 43 that is not in contact is in the range between the outer peripheral surface 11 of the retainer 3 and the inner peripheral surface 12 of the retainer 3 . Therefore, when the one-way clutch 1 is viewed from the axial direction, the tips 22 of the tongues 43 are hidden behind the retainer 3 as shown in FIGS. 4 and 7 .

However, as shown in FIG. 6 , when the tongue portion 43 is plastically deformed, the tip portion 22 is located radially inward of the inner peripheral surface 12 of the retainer 3 . Therefore, when the one-way clutch 1 is viewed from the axial direction, the tip portion 22 of the tongue piece portion 43 can be seen to protrude radially inward from the inner peripheral surface 12 of the retainer 3 . In other words, when the inspector sees the one-way clutch 1 from the axial direction, if the tip portion 22 of the tongue portion 43 protrudes from the inner peripheral surface 12 of the retainer 3, the tongue portion 43 is plastically deformed. can be determined to be

Thus, according to the one-way clutch 1, the inner peripheral surface 12 of the retainer 3 serves as a reference surface for checking whether the tongue portion 43 is plastically deformed. By visually observing the one-way clutch 1 from the axial direction, it is possible to inspect whether or not the tongue portion 43 is plastically deformed, and the inspection is easy.

[Regarding each form above]
As described above, according to the one-way clutch 1 of each of the above-described embodiments, it is possible to easily find out if the tongue portion 43 is plastically deformed.

The embodiments disclosed this time are illustrative in all respects and are not restrictive. The technical scope of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope of equivalents to the configuration described in the claims.

1: One-way clutch 2: Sprag 3: Cage 4: Spring 5: Outer ring member 6: Inner ring member 11: Outer peripheral surface 12: Outer peripheral surface 21: Curved portion 21a: Vertex on convex side 21b: Vertex on concave side 22: Tip Part 41: Rib part 42: Column part 43: Tongue part

Claims (5)

a plurality of sprags provided between an outer ring member and an inner ring member; an annular retainer for retaining the plurality of sprags at intervals in the circumferential direction; an annular spring for elastically pushing the sprag;
The spring includes a pair of annular ribs, a plurality of pillars connecting the pair of ribs, and a thin plate extending from the pillars in the circumferential direction and contacting the sprags to elastically press the sprags. having a tongue and
The tongue portion has a curved portion that is convex and curved radially outward from the column portion, and a tip that extends from the curved portion toward the sprag and contacts the sprag. death,
In a state in which the tongue portion is in the elastic region, the apex of the curved portion on the convex side is positioned radially outward of the outer peripheral surface of the retainer, and the apex of the curved portion on the concave side is located on the holding side. Located radially inward from the outer peripheral surface of the vessel,
When the tongue portion is in the plastic region, the apex of the curved portion on the concave surface side is positioned radially outward from the outer peripheral surface of the retainer.
one way clutch. When the tongue portion is in the elastic region, the radial position of the tip portion is in the range between the outer peripheral surface of the retainer and the inner peripheral surface of the retainer,
2. The one-way clutch according to claim 1, wherein when said tongue portion is in the plastic region, said tip portion is positioned radially inward of an inner peripheral surface of said retainer. a plurality of sprags provided between an outer ring member and an inner ring member; an annular retainer for retaining the plurality of sprags at intervals in the circumferential direction; an annular spring for elastically pushing the sprag;
The spring includes a pair of annular ribs, a plurality of pillars connecting the pair of ribs, and a tongue extending circumferentially from the pillars and contacting the sprags to elastically press the sprags. and
The tongue portion has a curved portion that is convex and curved radially outward from the column portion, and a tip that extends from the curved portion toward the sprag and contacts the sprag. death,
The apex of the curved portion on the convex surface side is positioned radially inward from the outer peripheral surface of the retainer when the tongue portion is in the elastic region, and when the tongue portion is in the plastic region, the holding angle is increased. Located radially outward from the outer peripheral surface of the vessel,
one way clutch. When the tongue portion is in the elastic region, the radial position of the tip portion is in the range between the outer peripheral surface of the retainer and the inner peripheral surface of the retainer,
4. The one-way clutch according to claim 3, wherein when the tongue portion is in the plastic region, the tip portion is located radially inward of the inner peripheral surface of the retainer. a plurality of sprags provided between an outer ring member and an inner ring member; an annular retainer for retaining the plurality of sprags at intervals in the circumferential direction; an annular spring for elastically pushing the sprag;
The spring includes a pair of annular ribs, a plurality of pillars connecting the pair of ribs, and a tongue extending circumferentially from the pillars and contacting the sprags to elastically press the sprags. and
The tongue portion has a curved portion that is convex and curved radially outward from the column portion, and a tip that extends from the curved portion toward the sprag and contacts the sprag. death,
When the tongue portion is in the elastic region, the radial position of the tip portion is in the range between the outer peripheral surface of the retainer and the inner peripheral surface of the retainer,
When the tongue portion is in the plastic region, the tip portion is positioned radially inward of the inner peripheral surface of the retainer.
one way clutch.

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