KR102398397B1 - One-way clutch, method for manufacturing the same and torque converter comprising the same - Google Patents

Abstract

The present invention includes a plurality of sprags 531 disposed at a predetermined interval in the circumferential direction between the outer ring 510 and the inner ring 520; and support parts 532 , 536 , 538 disposed in a circumferential direction between the outer ring 510 and the inner ring 520 and supporting the sprags 531 .
The support parts 532, 536, 538 are provided with a plurality of protrusions 535 which are spaced apart from each other and protrude in the radial direction along one axial end of the outer circumferential surface, and the protruding ends of the protrusions 535 are the outer ring ( 510) is coupled to the inner circumferential surface.
In a state in which the protrusions 535 are coupled to the inner circumferential surface of the outer ring 510, the space A between the protrusions 535 adjacent in the circumferential direction is axially opened.
Accordingly, according to the present invention, manufacturing cost is reduced, light weight is improved, durability is improved, and it is robust to manufacturing errors and operates stably, and drag torque can be reduced.

Description

One-way clutch, manufacturing method thereof, and torque converter including same

The present invention relates to a one-way clutch, a method for manufacturing the same, and a torque converter including the same, and more particularly, to reduce manufacturing cost, to reduce weight, to improve durability, to operate robustly against manufacturing errors and to stably operate, and to reduce drag torque. It relates to a one-way clutch, a manufacturing method thereof, and a torque converter including the same.

A torque converter for a vehicle is a mechanical element that transmits a driving force (torque) transmitted from an engine to a transmission side. The torque converter is provided between the engine and the transmission. In the starting stage, the torque converter multiplies the driving force of the engine through fluid and transmits it to the transmission, and in the lock-up stage, transmits the driving force of the engine to the transmission through direct mechanical connection.

In general, a torque converter includes an impeller, a turbine, a reactor, and the like. Here, a reactor is positioned between the impeller and the turbine to selectively divert the flow of oil from the turbine back to the impeller. The reactor is allowed to rotate in only one direction by the one-way clutch provided in the reactor.

The one-way clutch is provided between the radially inner edge of the reactor and the fixed end. The one-way clutch includes a sprag type using a sprag, a roller type using a roller, and the like.

The sprag-type one-way clutch is configured to include a sprag disposed between an outer ring and an inner ring, and a support portion for supporting the sprag. The outer ring may be coupled to the reactor to rotate, and the inner ring may be coupled to and fixed to the fixed end. The related prior art is as follows.

Prior art 1 is a sprag-type one-way clutch disclosed in Japanese Patent Laid-Open No. 2017-053453, as shown in FIGS. 1 and 2 .

1 and 2, the prior art 1 supports the sprag 4 along the circumferential direction in the supporter 5 used for the one-way clutch 1 having the sprag 4 in the annular space between the outer ring 2 and the inner ring 3 It is characterized in that the same number of pocket portions 6 for the sprag 4 are provided, and a dummy pocket portion 7 composed of holes penetrating the inner and outer diameter sides between the pocket portions 6 adjacent to each other in the circumferential direction is provided.

Also, in the prior art 1, the protrusion 9c is configured to protrude outward in the radial direction so that the circumscribed circle of the maximum diameter portion has a diameter slightly larger than the inner diameter of the outer ring 2 in the central portion of the pillar portion 9a provided in the outer supporter 5a.

Prior art 2 is a support device of the one-way clutch disclosed in Japanese Patent Application Laid-Open No. 1994-173977, as shown in FIG. 3 .

Referring to FIG. 3, the prior art 2 is a supporter of a one-way clutch coupled between the cylindrical inner surface of the outer ring and the cylindrical outer surface of the inner ring to maintain a torque transmission sprag in a predetermined state, and a butt end 4 in a part of the circumferential direction is composed of an annular body 1 to which the butt end 4 is welded, and pockets 3 for supporting sprags are formed at equal intervals in the circumferential direction of the annular body 1, and the surface of a pair of annular parts at both ends of the annular body 1 in the axial direction It is characterized in that a drag projection 6 for frictionally engaging the cylindrical inner surface of the outer ring or the cylindrical outer surface of the inner ring is formed on the pillar portion 5 between the adjacent pockets 3 because the shape is symmetrical.

Prior art 3 is a sprag support device of a one-way clutch disclosed in Japanese Patent Registration No. 2885335, as shown in FIG. 4 .

Referring to FIG. 4, in the prior art 3, a retainer 20 formed in the morning at a predetermined pitch in the longitudinal direction through a support hole through which the sprag 14 is fitted to a belt-shaped main body is installed, and the retainer 20 is curved into an annular shape to form an outer race 10 The outer periphery of the mounting flange 23 described between and the inner race 13 and provided by bending both sides in the width direction of the main body forming the belt shape in the outer circumferential direction by the elastic restoring force of the retainer 20 is pressed into contact with the inner circumferential surface of the outer race 10, and the outer race It is characterized in that the sprag 14 interposed between 10 and the inner race 13 is fitted in each support hole of the retainer 20 and arranged in the circumferential direction.

However, in the prior art 1 and the prior art 2, since the pocket portions 6a, 7a/pocket 3 are formed between the protrusions 9c/drag protrusions 6, the protrusions 9c/drag protrusions 6 are The pockets 6a and 7a/pocket 3 may be easily deformed by being press-fitted to the inner circumferential surface of the outer ring or under pressure after being press-fitted. Therefore, the one-way clutch is liable to malfunction or be damaged.

In addition, the pocket portions 6a and 7a/sprags penetrating through the pocket 3 and frictionally interfering with the inner circumferential surface of the outer ring and the protrusions 9c/drag protrusions 6 pressed into the inner circumferential surface of the outer ring are arranged alternately in the rotational direction. Because of this arrangement, depending on the manufacturing error of the inner circumferential surface of the outer ring or the protrusion 9c/drag protrusion 6, the sprag may cause unstable frictional interference with the inner circumferential surface of the outer ring, so that the one-way clutch may operate in an unstable manner.

In addition, in Prior Art 1 and Prior Art 2, since a plurality of protrusions 9c / drag protrusions 6 are formed in the central portion of the outer supporter 5a / annular body 1, the manufacturing cost is high to create a protrusion in the center can increase In particular, in the prior art 2, a casting process may be necessarily required to form the drag protrusion 6, and thus the manufacturing cost may further increase.

Prior art 3 press-fits the outer periphery of the mounting flange 23 in which both sides of the retainer 20 in the width direction are bent in the outer circumferential direction into the inner circumferential surface of the outer race 10, the mounting flange 23 is a fluid flow As a result, the drag torque of the torque converter may increase. Here, the drag torque may mean a torque applied in a direction opposite to the engine movement.

The present invention has been devised to solve the above problems, and the one-way clutch that reduces manufacturing cost, is lightweight, has improved durability, is strong against manufacturing errors, operates stably, and has reduced drag torque, a manufacturing method thereof, and comprising the same It aims to provide a torque converter.

In order to solve the above problems, the present invention includes a plurality of sprags 531 disposed at a predetermined interval in the circumferential direction between the outer ring 510 and the inner ring 520; And it provides a one-way clutch (500) disposed between the outer ring (510) and the inner ring (520) in the circumferential direction and including support parts (532, 536, 538) for supporting the sprags (531).

The support portions 532 , 536 , and 538 include a plurality of protrusions 535 protruding radially outward along one end of the axial direction of the outer circumferential surface.

The protrusions 535 are formed to be spaced apart from each other, and the protruding ends of the protrusions 535 are coupled to the inner circumferential surface of the outer ring 510 .

In a state in which the protrusions 535 are coupled to the inner circumferential surface of the outer ring 510 , the space A between the protrusions 535 adjacent in the circumferential direction is opened in the axial direction.

Three or more protrusions 535 are formed to protrude.

The protrusions 535 are formed at equal angular intervals along the circumferential direction.

The protrusions 535 are formed to extend at an angle of 8 to 30 degrees along the circumferential direction.

The support portions 532 , 536 , and 538 further include an extension portion 534 formed by bending radially outwardly at one end of the axial direction of the outer circumferential surface, and the projecting portions 535 are formed from the end of the extension portion 534 . It is formed to protrude outward in the radial direction.

The support parts 532 , 536 , and 538 include a first support part 532 and a second support part 536 supporting the outer and inner parts of the sprags 531 , respectively, and the first support part 532 . and the second support part 536 is spaced apart from each other and disposed in the circumferential direction between the outer ring 510 and the inner ring 520 , and the protrusions 535 are along one end of the outer peripheral surface of the first support part 532 in the axial direction. It is formed to protrude outward in the radial direction.

In addition, in order to solve the above problems, the present invention provides a support part manufacturing step (S610) of manufacturing the support part 532 by press working; a sprag manufacturing step (S620) of manufacturing the sprags 531; a sprag arrangement step of disposing the sprags 531 on the support 532 (S630); and a press-fitting step (S640) of press-fitting the support part 532 and the sprags 531 into the outer ring 510 (S640).

In addition, the present invention in order to solve the above problems, any one of the one-way clutch 500; and a reactor 400 connected to the one-way clutch 500; provides a torque converter 10 comprising.

The reactor 400 covers at least one of the front and rear sides of the one-way clutch 500 , and the reactor 400 has a fluid flow opening communicating with the space A between at least one of the protrusions 535 . (412, 413) is formed.

According to embodiments of the present invention, the protrusions 535 may be formed to protrude radially outward along one end of the outer peripheral surface of the first support part 532 in the axial direction. Accordingly, since the protrusion 535 coupled to the inner circumferential surface of the outer ring 510 can be easily manufactured by press working, manufacturing cost can be reduced.

According to embodiments of the present invention, the protrusion 535 may be provided along one end of the axial direction of the outer peripheral surface of the first support part 532 apart from the through hole 533 . Therefore, since the through hole 533 is not easily deformed by the pressure when or after coupling the protrusion 535 to the inner circumferential surface of the outer ring 510, the durability of the one-way clutch 500 can be improved and the one-way clutch 500 may operate stably.

According to the embodiments of the present invention, since the protrusion 535 may be coupled to the outer ring 510 at one end of the axial direction of the first support portion 532 , the sprags 531 may interfere with friction on the inner circumferential surface of the outer ring 510 . The protrusion 535 does not prevent it from being Therefore, even if there is a manufacturing error in the outer ring 510 or the protrusion 535, the one-way clutch 500 can be operated stably.

According to embodiments of the present invention, in a state coupled to the inner circumferential surface of the outer ring 510, the space A between the protrusions 535 adjacent in the circumferential direction may be opened in the axial direction. Therefore, since the space (A) is formed, the manufacturing cost can be reduced, the weight is reduced, and the fluid flow is facilitated through the space (A), so that the drag torque of the torque converter 10 can be reduced.

According to embodiments of the present invention, since three or more protrusions 535 are formed, the support portion 532 may be stably coupled to the inner circumferential surface of the outer ring 510 . In addition, since the stress transmitted to the support part 532 through three or more protrusions 535 is stably resolved without being concentrated in a specific direction, deformation of the support part 532 is prevented, so that the durability of the support part 532 can be improved. .

According to embodiments of the present invention, since the protrusions 535 are formed at equal angular intervals along the circumferential direction, the stress transmitted to the support 532 through the protrusions 535 coupled to the inner circumferential surface of the outer ring 510 is mutually Since the offset and deformation of the support part 532 are prevented, durability of the support part 532 may be improved.

According to embodiments of the present invention, the protrusions 535 are formed to extend at an angle of 8 to 30 degrees along the circumferential direction, so that the support 532 can be stably coupled to the inner circumferential surface of the outer ring 510 . In addition, since the space A between the protrusions 535 is sufficiently secured to facilitate fluid flow, the drag torque of the torque converter 10 may be reduced.

According to embodiments of the present invention, the extension portion 534 is bent radially outwardly at one end of the outer peripheral surface of the support portion 532 in the axial direction, and protrusions 535 may be formed at the end of the extension portion 534 . there is. Therefore, when the protrusion 535 is coupled to the inner circumferential surface of the outer ring 510 or the pressure after coupling is first transmitted to the extension 534 and then to the periphery of the through hole 533, the extension 534 is formed through the through hole. (533) It is possible to effectively prevent deformation. Accordingly, the durability of the one-way clutch 500 can be further improved at a low cost, and the one-way clutch 500 can operate more stably.

According to the embodiments of the present invention, the first support portion 532 and the second support portion 536 for supporting the outer and inner sides of the sprag 531 are spaced apart from each other, and the circumference between the outer ring 510 and the inner ring 520 . direction can be placed. Accordingly, since the fluid flow between the first support part 532 and the second support part 536 becomes smoother, the drag torque of the torque converter 10 may be further reduced.

According to embodiments of the present invention, in the support part manufacturing step ( S610 ), since the first support part 532 can be manufactured by press working, manufacturing cost can be reduced.

According to the embodiments of the present invention, in the support part manufacturing step (S610), when the first support part 532 and the sprags 531 are press-fitted into the outer ring 510, the through hole 533 is not easily deformed. can be pressed.

According to embodiments of the present invention, fluid flow openings 412 and 413 communicating with the space A between the at least one protrusion 535 may be formed in the reactor 400 . Therefore, since the fluid flow openings 412 and 413 are formed, the manufacturing cost can be reduced, the weight is reduced, and the fluid flow is facilitated through the fluid flow openings 412 and 413, so that the drag torque of the torque converter 10 can be reduced. there is.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 to 4 are views showing the prior art.
5 is a half cross-sectional view showing a torque converter according to an embodiment of the present invention.
6 to 8 are cross-sectional views, front views, and exploded perspective views of a reactor according to an embodiment of the present invention.
9 to 13 are a front view, a rear view, a left view, a cross-sectional view, and an exploded perspective view showing a sprag assembly according to an embodiment of the present invention.
14 to 17 are a front view, a rear view, a left view, and a right view showing a first support part according to an embodiment of the present invention.
18 is a flowchart illustrating a method of manufacturing a one-way clutch according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete and to completely convey the scope of the invention to those of ordinary skill in the art. It is provided to inform you. Therefore, the present invention is not limited to the embodiments disclosed below, and all changes and equivalents included in the technical spirit and scope of the present invention, as well as substituting or adding the configuration of any one embodiment and the configuration of other embodiments to each other It should be understood to include water or substitutes.

The accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and scope of the present invention It should be understood to include water or substitutes. In the drawings, in consideration of the convenience of understanding, the size or thickness may be exaggeratedly large or small, but the protection scope of the present invention should not be construed as being limited thereto.

The terms used herein are used only to describe specific embodiments or examples, and are not intended to limit the present invention. And singular expressions include plural expressions unless the context clearly dictates otherwise. In the specification, terms such as includes, consists of, etc. are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist. That is, in the specification, terms such as include and consist of. It should be understood that this does not preclude the possibility of addition or existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

When an element is referred to as being "on" or "below" another element, it should be understood that other elements may be present in the middle as well as disposed directly on the other element. .

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

For convenience of description, the direction along the longitudinal direction of the axis forming the center of rotation of the torque converter is referred to as the axial direction. ), for example, means a direction toward the engine, which is a power source, and the rear (rear) means another direction (second axial direction), for example, a direction toward the transmission. Therefore, the front (front) means the surface on which the surface faces the front, and the rear (rear) means the surface on which the surface faces the rear.

The radial or radial direction means a direction closer to the center or a direction away from the center along a straight line passing through the center of the rotation axis on a plane perpendicular to the rotation axis. A direction away from the center in a radial direction is referred to as a centrifugal direction, and a direction closer to the center is referred to as a centripetal direction.

The circumferential direction or the circumferential direction means a direction surrounding the rotation shaft. The outer circumference means the outer circumference, and the inner circumference means the inner circumference. Accordingly, the outer circumferential surface is a surface facing away from the rotation shaft, and the inner circumferential surface is a surface facing the rotation shaft.

[Torque Converter]

5 is a half cross-sectional view showing a torque converter according to an embodiment of the present invention.

Referring to FIG. 5 , the torque converter 10 according to an embodiment includes a front cover 100 , an impeller 200 , a turbine 300 , and a reactor 400 .

The front cover 100 is made of a disk-shaped member, is connected to the crankshaft of the engine, and can rotate by receiving driving force from the engine.

The impeller 200 may be coupled to the front cover 100 to rotate together in response to the rotation of the front cover 100 . As the impeller 200 rotates, the fluid inside the impeller 200 has rotational kinetic energy of the impeller 200 , and may flow to the turbine 300 while receiving a radially outward force by centrifugal force.

The turbine 300 may be installed to face the impeller 200 in front of the impeller 200 , and may be rotated about a predetermined axis by receiving the force of the fluid flowing from the impeller 200 . The center of rotation of the impeller 200 and the turbine 300 may be coaxial, and the impeller 200 and the turbine 300 may face each other to form a torus. The turbine 300 may be connected to the output side from the inside in the radial direction to output a rotational force.

A reactor 400 may be provided at a radially inner portion where the impeller 200 and the turbine 300 face each other. The reactor 400 is positioned between the impeller 200 and the turbine 300 to selectively divert the flow of the fluid coming out of the turbine 300 and return it to the impeller 200 . The reactor 400 will be viewed in FIGS. 6 to 8 .

[reactor]

6 to 8 are cross-sectional views, front views, and exploded perspective views of a reactor according to an embodiment of the present invention.

6 to 8 , a reactor 400 according to an embodiment includes an annular reactor body 410 and a plurality of reactor blades 420 extending outward in a radial direction from the reactor body 410 . is composed by

A one-way clutch 500 is installed on the inner periphery of the reactor body 410 , and the one-way clutch 500 may be supported by a fixed end. The one-way clutch 500 may prevent rotation of the reactor 400 with respect to the fixed end in one direction and allow rotation of the reactor 400 with respect to the fixed end in the other direction.

The impeller 200 rotates in the other direction, and the turbine 300 may also rotate in the other direction in accordance with this.

In addition, the reactor 400 may be configured to further include a retainer 430 installed in front of the reactor body 410 . The retainer 430 may prevent the one-way clutch 500 installed on the inner periphery of the reactor body 410 from escaping to the front.

Meanwhile, fluid flow openings 412 and 432 may be formed in the reactor body 410 and the retainer 430 . In this regard, it will be described later.

[One-Way Clutch]

6 and 8 , the one-way clutch 500 includes an outer ring 510 , an inner ring 520 , and a sprag assembly 530 .

The outer ring 510 may correspond to an outer race, and an outer circumferential surface of the outer ring 510 may be coupled to an inner circumferential surface of the reactor body 410 . Accordingly, the outer ring 510 may rotate together with the reactor body 410 .

The radially outer side of the sprag assembly 530 may be coupled to the inner circumferential surface of the outer ring 510 .

The inner ring 520 may correspond to the inner race, and the radially inner side of the sprag assembly 530 may be coupled to the outer circumferential surface of the inner ring 520 .

A spline hub having a tooth shape fixed so as not to be rotated with respect to the fixed end may be provided on the inner circumferential surface of the inner ring 520 . The inner ring 520 may be fixedly coupled to the fixed end.

Meanwhile, unlike FIG. 8 , the inner ring 520 may be integrally formed with the fixed end.

The sprag assembly 530 may be disposed between the outer ring 510 and the inner ring 520 . With respect to the sprag assembly 530, it will be described later.

[Sprag assembly]

9 to 13 are a front view, a rear view, a left view, a cross-sectional view, and an exploded perspective view showing a sprag assembly according to an embodiment of the present invention.

9 to 13 , the sprag assembly 530 according to an embodiment includes a sprag 531 , a first support part 532 , a second support part 536 , and a third support part 538 . is composed

[sprag]

A plurality of sprags 531 may be disposed with a predetermined interval in the circumferential direction between the outer ring 510 and the inner ring 520 . The sprag 531 may be in contact with the inner circumferential surface of the outer ring 510 and the outer circumferential surface of the inner ring 520 .

In addition, the sprag 531 may be supported by the first/second/third support parts 532 , 536 , and 538 .

The sprag 531 may be configured to be rotatable in only one direction between the outer ring 510 and the inner ring 520 .

For example, the sprag 531 may be formed to have a short axis and a long axis. When a torque is applied in the direction (eg, clockwise) in which the minor axis of the sprag 531 is fitted between the outer ring 510 and the inner ring 520 , the outer ring 510 or the inner ring 520 is rotatable and the sprag 531 is rotatable. ), when torque is applied in a direction in which the long axis is fitted (eg, counterclockwise), the outer ring 510 or the inner ring 520 may not rotate.

[First support part]

The first support portion 532 may be disposed in the circumferential direction between the outer ring 510 and the inner ring 520 to support the radially outer side of the sprags 531 . As shown in the drawing, the first support 532 may have a circular ring shape.

The first support portion 532 may include a through hole 533 and a protrusion 535 , and may further include an extension portion 534 .

The through-holes 533 may be formed as many as the number of sprags 531 , and may be formed corresponding to positions at which each sprag 531 is disposed.

One or more protrusions 535 may be spaced apart from each other and protrude along one end of the axial direction of the outer circumferential surface of the first support part 532 . In addition, the protruding ends of the protrusions 535 may be coupled to the inner circumferential surface of the outer ring 510 . For example, the protruding ends of the protrusions 535 may be press-fitted or press-fitted to the inner circumferential surface of the outer ring 510 .

At this time, that is, in a state in which the protrusions 535 are coupled to the inner circumferential surface of the outer ring 510 , the space A between the protrusions 535 adjacent in the circumferential direction may have an axially open shape.

Details related to the number, arrangement, and shape of the protrusions 535 will be described later with reference to FIGS. 14 to 17 .

In this way, the protrusions 535 are formed to protrude outward in the radial direction along one end of the axial direction of the outer circumferential surface of the first support portion 532, so that the protrusions 535 coupled to the inner circumferential surface of the outer ring 510 are easily manufactured by press working. This can reduce the manufacturing cost.

In addition, since the protrusion 535 is provided along one end of the axial direction of the outer circumferential surface of the first support part 532 apart from the through hole 533, the protrusion 535 is coupled to the inner circumferential surface of the outer ring 510 when or after coupling. Since the through hole 533 is not easily deformed by pressure, the durability of the one-way clutch 500 may be improved and the one-way clutch 500 may operate stably.

In addition, since the protrusion 535 is coupled to the outer ring 510 at one end of the axial direction of the first support portion 532 , the protrusion 535 prevents the sprags 531 from frictionally interfering with the inner circumferential surface of the outer ring 510 . Since it is not done, even if there is a manufacturing error in the outer ring 510 or the protrusion 535, the one-way clutch 500 can be operated stably.

In addition, in a state in which the protrusions 535 are coupled to the inner circumferential surface of the outer ring 510, the space A between the protrusions 535 adjacent in the circumferential direction is opened in the axial direction, so that the space A is formed. The drag torque of the torque converter 10 can be reduced because the cost can be reduced, the weight is reduced, and the fluid flow through the space A is smooth. Here, the drag torque may mean a torque applied in a direction opposite to the engine movement.

On the other hand, as shown in FIGS. 6 to 8 , when the reactor 400 covers at least one of the front and rear of the one-way clutch 500 , the space between the at least one protrusion 535 in the reactor 400 is Fluid flow openings 412 and 413 communicating with (A) may be formed. Specifically, for example, fluid flow openings 412 and 413 may be formed in the reactor body 410 and the retainer 430 .

As described above, the reactor 400 is provided with fluid flow openings 412 and 413 communicating with the space A between the at least one protrusion 535 , thereby reducing manufacturing cost and reducing the weight, and the fluid flow opening 412 . , 413), so that the fluid flow is smoothed, the drag torque of the torque converter 10 can be reduced.

The extension portion 534 may be formed by bending radially outwardly at one end of the outer circumferential surface of the first support portion 532 in the axial direction. The extension portion 534 may be formed to extend over the entire circumferential direction of the first support portion 532 . In this case, the protrusions 535 may protrude radially outward from the ends of the extension parts 534 .

In this way, the extension portion 534 is bent radially outwardly at one end of the outer circumferential surface of the support portion 532 in the axial direction, and the protrusions 535 are formed at the end of the extension portion 534, thereby forming the protrusion 535 into the outer ring. When coupled to the inner circumferential surface of the 510 or the pressure after coupling is first transmitted to the extension 534 and then transferred to the vicinity of the through-hole 533, the extension 534 effectively prevents the through-hole 533 from deforming. can Accordingly, the durability of the one-way clutch 500 can be further improved at a low cost, and the one-way clutch 500 can operate more stably.

[Second support part]

The second support portion 536 may be disposed in the circumferential direction between the outer ring 510 and the inner ring 520 to support radially inner sides of the sprags 531 . As shown in the drawing, the second support 536 may have a circular ring shape.

In addition, the second support part 536 may be disposed to be spaced apart from the first support part 532 , and the second support part 536 may include a through hole 537 .

The through-holes 537 may be formed as many as the number of sprags 531 , and may be formed corresponding to positions at which each sprag 531 is disposed.

As such, the first support part 532 and the second support part 536 for supporting the outside and the inside of the sprag 531 are spaced apart from each other and disposed in the circumferential direction between the outer ring 510 and the inner ring 520, Since fluid flows more smoothly between the first support part 532 and the second support part 536 , the drag torque of the torque converter 10 may be further reduced.

[3rd support part]

The third support portion 538 may be disposed between the outer ring 510 and the inner ring 520 in the circumferential direction to support the sprags 531 . The third support 538 may correspond to a ribbon spring. The third support part 538 may have a through hole 539 . As shown in the drawing, the third support 538 may have a circular ring shape.

The through-holes 539 may be formed as many as the number of sprags 531 , and may be formed corresponding to positions at which each sprag 531 is disposed.

On the other hand, although the present invention has been described for a sprag-type one-way clutch having three supports, it is also applied to a sprag-type one-way clutch consisting of one or more of the three supports or one support unit integrally integrated. can be applied.

14 to 17 are a front view, a rear view, a left view, and a right view showing a first support part according to an embodiment of the present invention.

14 to 17 , the first support part 532 according to an embodiment may include the protrusion part 535 as described above.

Three or more protrusions 535 may be formed to be spaced apart from each other in the radial direction along one end of the axial direction of the outer circumferential surface of the first support part 532 . For example, as shown in FIGS. 14 to 17 , four protrusions 535a/b/c/d may be formed to be spaced apart from each other.

In this way, since three or more protrusions 535 are formed, the support 532 can be stably coupled to the inner circumferential surface of the outer ring 510 and the stress transmitted to the support 532 through three or more protrusions 535 is Since it is stably resolved without being concentrated in a specific direction, deformation of the support part 532 is prevented, the durability of the support part 532 may be improved.

In addition, the protrusions 535 may be formed at equal angular intervals along the circumferential direction.

In this way, the protrusions 535 are formed at equal angular intervals along the circumferential direction, so that the stress transmitted to the support part 532 through the protrusions 535 coupled to the inner circumferential surface of the outer ring 510 is offset from each other and the support part 532 . Since deformation is prevented, durability of the support part 532 may be improved.

In addition, the protrusions 535 may be formed to extend at a specific angle B along the circumferential direction. Specifically, the protrusions 535 may be formed to extend to a length corresponding to a specific angle B along the circumferential direction of the first support part 532 based on the central point P of the first support part 532 .

Here, the specific angle B may correspond to any one of 8 degrees to 30 degrees.

As such, the protrusions 535 are formed to extend at an angle of 8 to 30 degrees along the circumferential direction, whereby the support 532 may be stably coupled to the inner circumferential surface of the outer ring 510 . In addition, since the space A between the protrusions 535 is sufficiently secured to facilitate fluid flow, the drag torque of the torque converter 10 may be reduced.

18 is a flowchart illustrating a one-way clutch manufacturing method according to an embodiment of the present invention.

Referring to FIG. 18 , the one-way clutch manufacturing method 600 according to an embodiment includes a support part manufacturing step (S610), a sprag manufacturing step (S620), a sprag arrangement step (S630) and a press-fitting step (S630). can be configured.

In the support part manufacturing step ( S610 ), the first support part 532 may be manufactured by press working. At this time, by manufacturing by press working, the manufacturing cost can be reduced.

In the sprag manufacturing step ( S620 ), sprags 531 may be manufactured.

In the sprag arrangement step ( S630 ), sprags 531 may be disposed on the first support part 532 .

In the press-fitting step ( S640 ), the first support part 532 and the sprags 531 may be press-fitted into the outer ring 510 . At this time, the protrusion 535 is provided along one end of the axial direction of the outer circumferential surface of the first support portion 532 apart from the through hole 533 , so that the first support portion 532 and the sprags 531 are provided on the outer ring 510 . When press-fitting, the through-hole 533 is not easily deformed, so that it can be easily press-fitted.

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made.

In addition, although the effects of the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

10: torque converter
100: front cover 200: impeller
300: turbine
400: reactor
410: reactor body 412: fluid flow opening
420: reactor blade
430: retainer 432: fluid flow opening
500: one-way clutch
510: outer ring 520: inner ring
530: sprag assembly 531: sprag
532: first support 533: through hole
534: connection part 535: protrusion
536: second support 537: through hole
538: third support 539: through hole
600: one-way clutch manufacturing method

Claims (9)

a plurality of sprags 531 disposed at a predetermined interval in the circumferential direction between the outer ring 510 and the inner ring 520; and
It is disposed in the circumferential direction between the outer ring 510 and the inner ring 520 and includes a circular annular support portion (532, 536, 538) for supporting the sprags (531),
The annular support parts 532 , 536 , 538 include a first support part 532 adjacent to the outer race 510 , a second support part 536 adjacent to the inner race 520 , and the first support part 532 in the radial direction. ) and a ribbon spring 538 positioned between the second support 536,
The first support part 532 is formed to be bent radially outwardly at one end of the outer peripheral surface in the axial direction, and the extension part 534 and the extension part 534 are formed to extend over the entire circumferential direction of the first support part 532 . Having three or more projections 535 protruding outward in the radial direction from the end of
The protrusions 535 are formed to be spaced apart from each other at an equal angle along the circumferential direction, and each of the protruding ends of the protrusions 535 is coupled to the inner circumferential surface of the outer ring 510,
In a state in which the protrusions 535 are coupled to the inner circumferential surface of the outer ring 510, the space A between the protrusions 535 adjacent in the circumferential direction is axially opened. (500).
delete delete The method according to claim 1,
The one-way clutch 500, characterized in that the protrusions 535 extend at an angle of 8 to 30 degrees along the circumferential direction.
delete delete In the manufacturing method of the one-way clutch 500 of claim 1 or 4,
a support part manufacturing step (S610) of manufacturing the first support part 532 by press working;
a sprag manufacturing step (S620) of manufacturing the sprags 531;
a sprag arrangement step of disposing the sprags 531 on the first support part 532 (S630); and
A one-way clutch manufacturing method (600) including a; press-fitting the first support part (532) and the sprags (531) into the outer ring (510) (S640).
The one-way clutch 500 of claim 1 or claim 4; and
A torque converter (10) including; a reactor (400) connected to the one-way clutch (500).
9. The method of claim 8,
The reactor 400 covers at least one of the front and rear of the one-way clutch 500,
A torque converter (10), characterized in that the reactor (400) is formed with fluid flow openings (412, 413) communicating with the space (A) between the at least one protrusion (535).

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