KR20210058493A - One-way clutch, torque converter comprising the same and method for manufacturing torque converter - Google Patents

Abstract

The present invention relates to a one-way clutch (500) which comprises: an outer race (510) with a hollow unit (512) inside; an inner race (520) placed with the same shaft as in the outer race (510); and a control unit (530) placed in a circumferential direction between the outer race (510) and the inner race (520). The control unit (530) prevents or allows the relative rotation of the outer race (510) in accordance with the relative rotating direction of the outer race (510) toward the inner race (520). The hollow unit (512) includes a lightweight member (512) which is made of materials which are lighter than the materials of the outer race (510). Accordingly, the present invention is able to be lightweight, manufactured easily at a low cost, improve durability and energy efficiency, and operate in a stable manner.

Description

ONE-WAY CLUTCH, TORQUE CONVERTER COMPRISING THE SAME AND METHOD FOR MANUFACTURING TORQUE CONVERTER}

The present invention relates to a one-way clutch, a torque converter including the same, and a method of manufacturing a torque converter, and more particularly, a one-way clutch that is easily lightweight at low cost, improves durability and energy efficiency, and operates stably, including the same. It relates to a torque converter and a method of manufacturing a torque converter.

The one-way clutch includes an outer race, an inner race coaxial with the outer race and installed concentrically with the outer race, and a control unit disposed between the outer race and the inner race.

The control unit permits or blocks the rotation of the outer race or the inner race according to the relative rotation directions of the outer race and the inner race. The control unit may include a sprag or a roller, and a support unit supporting them.

For example, the one-way clutch may be provided in a reactor of a vehicle torque converter. Let's take a look at this.

The vehicle torque converter is a mechanical element that transmits the driving force (torque) transmitted from the engine to the transmission side. The torque converter is provided between the engine and the transmission. The torque converter multiplies the driving force of the engine through a fluid in the starting stage 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, and a reactor. Here, the reactor is positioned between the impeller and the turbine to selectively divert the flow of fluid from the turbine and return it to the impeller. Since the reactor is allowed to rotate only in one direction by the one-way clutch provided in the reactor, the flow of the fluid can be selectively switched.

The one-way clutch provided in the reactor is provided between the inner radial edge of the reactor and the fixed end. The outer race of the one-way clutch can be coupled to the reactor to receive the rotational force of the reactor, and the inner race can be coupled to the fixed end and fixed.

On the other hand, a torque converter for vehicles is required to be lighter in order to improve fuel economy. The related prior art is as follows.

As shown in Fig. 1, Japanese Laid-Open Patent No. 1994-047740 discloses the sprag 3 and the sprag 3 disposed at a predetermined distance in the circumferential direction between the outer ring 1 and the inner ring 2. In the one-way clutch having a supporter (4, 5) for holding the sprag (3) and a spring (8) for applying a force in a direction in which the sprag (3) is engaged with the outer ring (1) and the inner ring (2), the sprag (3) provides a one-way clutch, characterized in that it has a hollow (10) penetrating in the axial direction.

However, the prior art only proposes a method of reducing the volume of the sprag 3, which is small in volume, only to reduce the weight of the reactor itself that is coupled with the one-way clutch (one-way clutch) or the bulky outer race in the one-way clutch (one-way clutch). It cannot suggest a way to lighten the (outer ring).

The present invention was conceived to solve the above-described problems, and an object of the present invention is to provide a one-way clutch that is easily lightweight at low cost, improves durability and energy efficiency, and operates stably, and a torque converter and a method for manufacturing a torque converter including the same. It is done.

In order to solve the above-described problem, the present invention includes an outer race 510 having a hollow part 512 formed therein; An inner race 520 arranged coaxially with the outer race 510; And a control unit 530 disposed between the outer race 510 and the inner race 520 in the circumferential direction.

The control unit 530 prevents or permits the relative rotation of the outer race 510 according to the relative rotation direction of the outer race 510 with respect to the inner race 520.

A lightweight member 514 of a material that is lighter than that of the outer race 510 is installed in the hollow part 512.

The hollow part 512 is defined by a centrifugal wall 510a disposed radially outward of the outer race 510 and a centripetal wall 510b disposed radially inwardly from the centrifugal wall 510a.

The hollow part 512 is formed to extend along the circumferential direction of the outer race 510.

The lightweight member 514 is formed in a shape corresponding to the hollow portion 512 and is installed in the hollow portion 512.

The outer race 510 includes a reinforcing bar 516 connecting the centrifugal wall 510a and the centripetal wall 510b to the hollow part 512.

The reinforcing bars 516 are disposed in the circumferential direction of the outer race 512 at intervals.

Three or more reinforcing bars 516 are disposed along the circumferential direction.

The reinforcing bars 516 are disposed at equiangular intervals along the circumferential direction.

The hollow part 512 is opened to one side in the axial direction.

A groove 518 is formed in at least one of radially inner or outer inner side of the hollow part 512.

The lightweight member 514 is formed in a shape corresponding to the hollow part 512 and is inserted into the groove 518.

Between one side in the axial direction and the other side of the hollow part 512, there is a region in which the cross-sectional area decreases toward one side.

The lightweight member 514 is formed in a shape corresponding to the hollow part 512.

In addition, the present invention in order to solve the above-described problem, the one-way clutch 500; And a reactor 400 including a reactor body 410 into which the outer race 510 is pressed into an inner circumferential surface.

The reactor body 410 is formed of a material that is lighter than that of the outer race 510.

The reactor body 410 includes a magnesium material, and the outer race 510 includes a steel material.

The reactor body 410 has a seating surface 412 on which one side of the outer race 510 is seated.

The hollow part 512 is opened to one side of the outer race 510, and the outer race 510 is the reactor body so that the open side of the hollow part 512 faces the seating surface 412. It is installed at 410.

In addition, the present invention in order to solve the above-described problem, the reactor body manufacturing step (S610) of manufacturing the reactor body 410; An outer race manufacturing step (S620) of manufacturing the outer race 510; And a press-fitting step (S630) of pressing the outer race 510 into the reactor body 410 (S630).

In the outer race manufacturing step (S620), the lightweight member 514 is insert-injected into the hollow part 512.

According to embodiments of the present invention, the hollow part 512 may be formed inside the outer race 510. Therefore, the outer race 510 can be easily lightweight at low cost. In addition, since the outer race 510 is lighter, energy consumed to rotate the reactor 400 coupled with the outer race 510 can be reduced, the energy efficiency of the torque converter 10 can be improved, and the torque converter (10) is lighter, so the fuel economy of the vehicle can be improved. In addition, since the indentation stress (indentation strength) of the outer race 510 with respect to the reactor body 410 may be reduced by the hollow portion 512 formed inside the outer race 510, the strength or hardness of the reactor body 410 Even if is reduced, the inner circumferential surface of the reactor body 410 is not easily worn, so that the reactor 400 and the one-way clutch 500 can operate stably.

According to embodiments of the present invention, a lightweight member 514 formed of a material that is lighter than that of the outer race 510 may be installed in the hollow portion 512. Accordingly, the outer race 510 can be easily lightened at low cost, the weight of the outer race 510 is reduced, so that the energy efficiency of the torque converter 10 can be improved, and the fuel economy of the vehicle can be improved.

According to embodiments of the present invention, a centrifugal wall 510a in which the hollow part 512 is disposed radially outward of the outer race 510 and a centripetal wall disposed radially inwardly from the centrifugal wall 510a ( 510b). Therefore, since the thickness of the centrifugal wall 510a is thinner than the outer race 510 and the hollow part 512 is formed in the inner circumference of the centrifugal wall 510a, even if the centrifugal wall 510a is pressed into the reactor body 410, the reactor 400 The indentation stress (indentation strength) of the outer race 510 for may be reduced. When the press-in stress (press-in strength) of the outer race 510 with respect to the reactor 400 decreases, the inner circumferential surface of the reactor body 410 is not easily worn, so that the reactor 400 and the one-way clutch 500 can operate stably. have. In addition, since the centripetal wall 510b may contact the roller 532, the outer race 510 may frictionally interfere with the roller 532, so that the one-way clutch 500 may stably operate.

According to embodiments of the present invention, the hollow part 512 may be formed to extend along the circumferential direction of the outer race 510. Therefore, since the press-in stress (press-in strength) of the outer race 510 with respect to the reactor body 410 is uniformly applied to the inner circumferential surface of the reactor body 410, the inner circumferential surface of the reactor body 410 is not easily worn. Durability of the way clutch 500 may be improved, and the reactor 400 and the one-way clutch 500 may operate stably. In addition, since the hollow part 512 is formed extending along the circumferential direction in the ring-shaped outer race 510, the volume of the hollow part 512 is maximized and the weight of the outer race 510 can be reduced to the maximum. The energy efficiency of (10) can be effectively improved, and the fuel efficiency of the vehicle can be effectively improved.

According to the embodiments of the present invention, the lightweight member 514 is installed in the hollow portion 512 between the centrifugal wall 510a and the centripetal wall 510b, so that the light weight member 514 has a radius of the centripetal wall 510b. The one-way clutch 500 is supported so that it is not pushed to the hollow part 512 outside the direction so that the inner circumferential surface of the centripetal wall 510b stably contacts the outer circumferential surface of the roller 532 included in the control unit 530 and can interfere with friction. Can operate stably. In particular, when the control unit 530 attempts to prevent the relative rotation of the outer race 510 with respect to the inner race 520, the relative rotation of the outer race 510 may be effectively and stably prevented.

According to embodiments of the present invention, the reinforcing bar 516 is provided in the hollow part 512 to connect the centrifugal wall 510a and the centripetal wall 510b. Therefore, since the reinforcing bar 516 supports the centrifugal wall 510a and the centripetal wall 510b to prevent deformation of the outer race 510, it is possible to easily improve the durability of the one-way clutch 500 at low cost. The clutch 500 can be made to operate stably.

According to embodiments of the present invention, the reinforcing bars 516 may be disposed in the circumferential direction of the outer race 512 at intervals. Therefore, since the reinforcing bar 516 effectively supports the centrifugal wall 510a and the centripetal wall 510b to prevent deformation of the outer race 510, the durability of the one-way clutch 500 can be further improved at low cost and easily. The one-way clutch 500 can be made to operate more stably.

According to embodiments of the present invention, three or more reinforcing bars 516 may be disposed along the circumferential direction. Therefore, since the reinforcing bar 516 effectively supports the centrifugal wall 510a and the centripetal wall 510b to prevent deformation of the outer race 510, the durability of the one-way clutch 500 can be further improved at low cost and easily. The one-way clutch 500 can be made to operate more stably.

According to the embodiments of the present invention, the reinforcing bars 516 are arranged at equiangular intervals along the circumferential direction, so that the reinforcing bars 516 effectively support the centrifugal wall 510a and the centripetal wall 510b, thereby forming the outer race 510. Since the deformation of the one-way clutch 500 can be easily improved at low cost and the durability of the one-way clutch 500 can be more stably operated.

According to the embodiments of the present invention, the hollow part 512 may be formed to be opened to one side in the axial direction. Accordingly, the lightweight member 514 may be easily installed in the hollow part 512.

According to embodiments of the present invention, a groove 518 is formed in at least one of radially inner or outer inner side of the hollow part 512 and the lightweight member 514 has a shape corresponding to the hollow part 512. It may be formed and inserted into the groove 518. Therefore, even if pressure, impact, etc. are applied to the lightweight member 514, the lightweight member 514 does not easily leave the hollow part 512, so the durability of the one-way clutch 500 can be improved easily at low cost. The way clutch 500 may operate stably.

According to embodiments of the present invention, between one side of the open axial direction of the hollow part 512 and the other side, there is an area in which the cross-sectional area decreases toward one side, and the lightweight member 514 corresponds to the hollow part 512. It can be formed into a shape. Therefore, even if pressure, impact, etc. are applied to the lightweight member 514, the lightweight member 514 does not easily leave the hollow part 512, so the durability of the one-way clutch 500 can be improved easily at low cost. The way clutch 500 may operate stably.

According to embodiments of the present invention, the reactor body 410 may be formed of a material that is lighter than that of the outer race 510. Accordingly, since energy consumed to rotate the reactor 400 can be reduced, energy efficiency of the torque converter 10 can be improved, and the torque converter 10 can be lightened, thereby improving fuel efficiency of the vehicle.

According to embodiments of the present invention, the reactor body 410 may include a magnesium material, and the outer race 510 may include a steel material. Therefore, since the weight of the reactor 400 is reduced, energy consumed to rotate the reactor 400 can be reduced, the energy efficiency of the torque converter 10 can be improved, and the torque converter 10 is lightened to reduce the weight of the vehicle. Fuel economy can be improved.

According to embodiments of the present invention, the reactor body 410 has a seating surface 412 on which one side of the outer race 510 is seated, and the hollow part 512 on which the lightweight member 514 is installed is The outer race 510 may be installed on the reactor body 410 such that it is opened to one side of the race 510 and the opened side of the hollow part 512 faces the seating surface 412. Accordingly, it is possible to prevent the lightweight member 514 installed in the hollow portion 512 from exiting the hollow portion 512 and being separated from the outer race 510.

According to embodiments of the present invention, in the outer race manufacturing step (S620), the outer race 510 in which the hollow part 512, the reinforcement 516, or the groove 518 is formed may be manufactured/processed through the sintering process. The outer race 510 of the present invention can be easily formed at low cost without an additional process.

According to embodiments of the present invention, even if the strength or hardness of the reactor body 410 decreases in the press-fitting step (S630), the press-fit stress of the outer race 510 is reduced to protect the inner circumferential surface of the reactor body 410, so it is easy at low cost. And it is possible to stably install the outer race 510.

In addition to the above-described effects, specific effects of the present invention will be described together with explanation of specific matters for carrying out the present invention.

1 is a view showing the prior art.
2 is a half sectional view showing a torque converter according to an embodiment of the present invention.
3 to 9 are perspective views, a front view, a rear view, a left view, a cross-sectional view, and an exploded perspective view showing a reactor according to an embodiment of the present invention.
10 to 15 are a perspective view, a front view, and a left side view showing a one-way clutch according to an embodiment of the present invention.
16 to 18 are a rear view showing an outer race according to an embodiment of the present invention and a cross-sectional view AA′ of FIG. 16.
19 is a flow chart showing a method of manufacturing a torque converter 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, only this embodiment is to complete the disclosure of the present invention, and to those of ordinary skill in the entire scope of the invention. It is provided to inform you. Therefore, the present invention is not limited to the embodiments disclosed below, and all modifications and equality included in the technical spirit and scope of the present invention as well as substituting or adding to each other the configuration of any one embodiment and the configuration of another embodiment It should be understood to include water or substitutes.

The accompanying drawings are only for making it easier to understand the embodiments disclosed in the present specification, and the technical idea 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, components may be expressed exaggeratedly large or small in size or thickness in consideration of convenience of understanding, etc., but this will not limit the scope of the present invention to be interpreted.

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

Terms including ordinal numbers such as first and second 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 component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

When an element is referred to as being “above” or “being below” another element, it should be understood that not only is disposed directly above the other element, but also other elements may exist in the middle. .

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

For convenience of explanation, 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. The front-rear direction or the axial direction is a direction parallel to the rotation axis, and the front (front) is in any one direction (the first axis direction). ), for example, refers to the direction toward the engine, which is the power source, and the rear (rear) refers to the other direction (the second axis direction), such as the direction toward the transmission. Therefore, the front (front) means the surface that the surface faces forward, and the rear (rear surface) means the surface that the surface faces rearward.

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 called a centrifugal direction, and a direction closer to the center is called a centripetal direction.

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

[Torque converter]

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

Referring to FIG. 2, a torque converter 10 according to an embodiment includes a front cover 100, an impeller 200, a turbine 300, a reactor 400, and a one-way clutch 500.

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 is coupled to the front cover 100 and may 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 force radially outward by the centrifugal force.

The turbine 300 may be installed to face the impeller 200 in front of the impeller 200, and may rotate around a predetermined axis by receiving the force of the fluid flowing from the impeller 200. The rotation center 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 may be positioned between the impeller 200 and the turbine 300 to selectively convert the flow of fluid from the turbine 300 to return to the impeller 200. The reactor 400 will be described with reference to FIGS. 3 to 9.

[Reactor]

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

3 to 9, the reactor 400 according to an embodiment includes an annular reactor body 410 and a plurality of reactor blades 420 extending radially outward from the reactor body 410. It is composed of.

The outer race 510 of the one-way clutch 500 is pressed into the inner circumference 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 the reactor 400 from rotating in one direction with respect to the fixed end, and allow the reactor 400 to rotate in the other direction with respect to the fixed end.

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

In addition, the reactor body 410 may include a seating surface 412 on which one side of the outer race 510 is seated, as shown in FIGS. 2 and 7.

In this way, the reactor body 410 has a seating surface 412 on which one side of the outer race 510 is seated, and the hollow part 512 on which the lightweight member 514 is installed is one side of the outer race 510 The outer race 510 is installed on the reactor body 410 so that the opened side of the hollow part 512 faces the seating surface 412, and thus a lightweight member 514 installed in the hollow part 512 The hollow part 512 can be prevented from being separated from the outer race 510 by exiting the hollow part 512. It will be described later in this regard.

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 in the inner circumference of the reactor body 410 from coming out forward.

Meanwhile, the entire reactor 400 or the reactor body 410 may be formed of a material that is lighter than the material of the outer race 510 pressed into the reactor body 410. For example, the outer race 510 may be formed of a material including steel, and the reactor body 410 may be formed of a material including magnesium, which is lighter than steel.

In this way, by forming the entire reactor 400 or the reactor body 410 of a lightweight material, energy consumed to rotate the reactor 400 can be reduced, so that the energy efficiency of the torque converter 10 can be improved. In addition, the torque converter 10 can be lightened, so that the fuel economy of the vehicle can be improved.

The specific effect is as follows.

[Table 1]

On the other hand, if the reactor 400 is changed to a lightweight material containing magnesium, etc., the strength or hardness of the inner circumferential surface of the reactor body 410 will be reduced compared to the existing reactor body 410 formed of, for example, a material containing aluminum. I can. When the existing outer race 510 is pressed into the inner circumferential surface of the reactor body 410 with reduced strength or hardness, the inner circumferential surface may be easily worn.

Accordingly, it is necessary to reduce the press-in stress (press-in strength) of the outer race 510 to prevent abrasion of the inner circumferential surface of the reactor body 410 and to make the reactor 400 and the one-way clutch 500 operate stably.

Hereinafter, a one-way clutch 500 capable of obtaining such an effect will be described.

[One-way clutch]

10 to 15 are a perspective view, a front view, and a left side view showing a one-way clutch according to an embodiment of the present invention.

10 to 15, a one-way clutch 500 according to an embodiment may include an outer race 510, an inner race 520, and a control unit 530.

[Outer Race]

The outer race 510 may correspond to a ring shape, and a plurality of teeth may be provided on the outer circumferential surface.

The teeth may be formed to protrude radially outward along the outer circumference of the outer race 510. The teeth may be press-fit into the inner circumferential surface of an external structure such as the reactor body 410 described above. Accordingly, the outer race 510 may rotate together by being coupled/fastened with an external structure such as the reactor body 410 or the like.

Hereinafter, the external structure and the reactor body 410 are mixed.

The inner circumferential surface of the outer race 510 may contact the outer circumferential surface of the roller 532 included in the control unit 530. However, it is not limited to this configuration. For example, the control unit 530 may be configured to include a sprag instead of the roller 532. Hereinafter, it is the same.

In addition, the inner circumferential surface of the outer race 510 may be formed such that the distance from a certain supporting part 534 to the next supporting part 534 in a clockwise direction gradually decreases from a distance to the outer circumferential surface of the inner race 520. That is, the space between the races 510 and 520 may be smaller as the support part 534 moves toward the next support part 534 in a clockwise direction, for example. Therefore, when the roller 532 moves from a certain support part 534 toward the next support part 534 in a clockwise direction by rotation of the one-way clutch 500, the roller 532 is sandwiched between the races 510, 520 and thus one-way It is possible to prevent the relative rotation of the clutch 500. However, it is not limited to this configuration.

[Hollow Department]

In addition, as shown in FIG. 15, the outer race 510 may have a hollow part 512 formed therein.

In this way, since the hollow portion 512 is formed inside the outer race 510, the outer race 510 can be easily reduced in weight at low cost.

In addition, since the outer race 510 is lighter, energy consumed to rotate the reactor 400 coupled with the outer race 510 can be reduced, the energy efficiency of the torque converter 10 can be improved, and the torque converter (10) is lighter, so the fuel economy of the vehicle can be improved.

In addition, since the indentation stress (indentation strength) of the outer race 510 with respect to the reactor body 410 may be reduced by the hollow portion 512 formed inside the outer race 510, the strength or hardness of the reactor body 410 Even if is reduced, the inner circumferential surface of the reactor body 410 is not easily worn, so that the reactor 400 and the one-way clutch 500 can operate stably.

The hollow part 512 may be defined by a centrifugal wall 510a disposed radially outward of the outer race 510 and a centripetal wall 510b disposed radially inwardly from the centrifugal wall 510a.

The outer circumferential surface of the centrifugal wall 510a is an outer circumferential surface of the outer race 510 and may be coupled to the inner circumferential surface of the reactor body 410. The inner circumferential surface of the centripetal wall 510b is an inner circumferential surface of the outer race 510 and may contact the outer circumferential surface of the roller 532.

In this way, the hollow part 512 is defined by a centrifugal wall 510a disposed radially outward of the outer race 510 and a centripetal wall 510b disposed radially inwardly from the centrifugal wall 510a. , Since the thickness of the centrifugal wall 510a is thinner than the outer race 510 and a hollow part 512 is formed in the inner circumference of the centrifugal wall 510a, even if the centrifugal wall 510a is pressed into the reactor body 410, The indentation stress (indentation strength) of the outer race 510 for the outer race 510 may be reduced. Accordingly, since the inner peripheral surface of the reactor body 410 is not easily worn, the reactor 400 and the one-way clutch 500 can operate stably.

In addition, the centripetal wall 510b is in contact with the roller 532, so that the outer race 510 is frictionally interfered with the roller 532, so that the one-way clutch 500 can stably operate.

In addition, the hollow part 512 may be formed to extend along the circumferential direction of the outer race 510.

In this way, the hollow part 512 is formed to extend along the circumferential direction of the outer race 510, so that the press-fit stress (press-fit strength) of the outer race 510 with respect to the reactor body 410 is applied to the inner circumferential surface of the reactor body 410. Since the inner circumferential surface of the reactor body 410 is not easily worn because it is applied evenly, the durability of the reactor 400 and the one-way clutch 500 can be improved, and the reactor 400 and the one-way clutch 500 can operate stably. I can.

In addition, since the hollow part 512 is formed extending along the circumferential direction in the ring-shaped outer race 510, the volume of the hollow part 512 is maximized and the weight of the outer race 510 can be reduced to the maximum. The energy efficiency of (10) can be effectively improved, and the fuel efficiency of the vehicle can be effectively improved.

A lightweight member 514 may be installed in the hollow part 512. With respect to the lightweight member 514, it will be described later.

In addition, the hollow part 512 may be formed to be open to one side in the axial direction.

In this way, since the hollow portion 512 is formed to be open to one side in the axial direction, a lightweight member 514 to be described later can be easily installed in the hollow portion 512.

On the other hand, as shown in FIGS. 2, 7 and 8, one side of the outer race 510 may be mounted on the mounting surface 412 provided in the reactor body 410, and the hollow part 512 is the outer race 510 ), and the open side of the hollow part 512 may face the seating surface 412.

In this way, the reactor body 410 has a seating surface 412 on which one side of the outer race 510 is seated, and the hollow part 512 is opened to one side of the outer race 510, and the hollow part 512 ), by facing the seating surface 412, it is possible to prevent the lightweight member 514 installed in the hollow part 512 from exiting the hollow part 512 and being separated from the outer race 510 .

[Lightweight member]

The lightweight member 514 may be formed of a material that is lighter than that of the outer race 510 and may be installed in the hollow part 512. In addition, the lightweight member 514 may be formed in a shape corresponding to the hollow portion 512.

For example, the lightweight member 514 may be formed of a thermoplastic plastic such as polycarbonate and may be installed in the hollow part 512 through an insert injection process.

In this way, the lightweight member 514 formed of a material that is lighter than the material of the outer race 510 is installed in the hollow portion 512, so that the outer race 510 can be easily lightened at low cost and the outer race 510 By reducing the weight of the torque converter 10, the energy efficiency of the torque converter 10 may be improved, and the fuel economy of the vehicle may be improved.

The specific effect is as follows.

[Table 2]

In addition, the lightweight member 514 is installed in the hollow portion 512 between the centrifugal wall 510a and the centripetal wall 510b, so that the light weight member 514 is ), so that the inner circumferential surface of the centripetal wall 510b can stably contact the outer circumferential surface of the roller 532 included in the control unit 530 so that friction can be interfered, so that the one-way clutch 500 can operate stably. .

In particular, when the control unit 530 tries to prevent the relative rotation of the outer race 510 with respect to the inner race 520, that is, when the outer race 510 and the inner race 520 are to be engaged, a lightweight member ( By 514 strongly supporting the centrifugal wall 510a and the centripetal wall 510b, it is possible to keep the centrifugal wall 510a and the reactor body 410 bound continuously, and the centripetal wall 510b is the control unit 530 It is possible to continue frictional interference with the roller 532 included in the. Accordingly, it is possible to effectively and stably prevent the relative rotation of the outer race 510.

On the other hand, even if the lightweight member 514 is installed in the hollow part 512, the press-fit stress (press-fit strength) of the outer race 510 with respect to the reactor body 410 must be sufficiently small to not wear the inner circumferential surface of the reactor body 410. I can.

As shown in FIGS. 2 and 7, the lightweight member 514 may be stably accommodated in the hollow part 512 by being blocked by the seating surface 412 facing the open side of the hollow part 512. Another method in which the lightweight member 514 is stably accommodated in the hollow part 512 will be described later in FIGS. 17 and 18.

[Reinforcement belt]

The reinforcing bar 516 may be provided in the hollow part 512 and may connect the centrifugal wall 510a and the centripetal wall 510b.

In this way, the reinforcing bar 516 is provided in the hollow part 512 to connect the centrifugal wall 510a and the centripetal wall 510b, so that the reinforcing bar 516 supports the centrifugal wall 510a and the centripetal wall 510b. Since deformation of the outer race 510 is prevented, durability of the one-way clutch 500 can be easily improved at low cost, and the one-way clutch 500 can operate stably.

The reinforcing bars 516 may be disposed in the circumferential direction of the outer race 512 at intervals.

In this way, the reinforcing bars 516 are arranged in the circumferential direction of the outer race 512 at intervals, so that the reinforcing bars 516 effectively support the centrifugal wall 510a and the centripetal wall 510b to deform the outer race 510. Therefore, the durability of the one-way clutch 500 can be further improved at low cost and the one-way clutch 500 can operate more stably.

In addition, three or more reinforcing bars 516 may be disposed along the circumferential direction.

In this way, since three or more reinforcing rods 516 are disposed along the circumferential direction, the reinforcing rods 516 effectively support the centrifugal wall 510a and the centripetal wall 510b to prevent deformation of the outer race 510 at low cost. Easily, the durability of the one-way clutch 500 can be further improved, and the one-way clutch 500 can operate more stably.

In addition, the reinforcing bars 516 may be disposed at equiangular intervals along the circumferential direction.

In this way, the reinforcement bar 516 is arranged at equiangular intervals along the circumferential direction, so that the reinforcement bar 516 effectively supports the centrifugal wall 510a and the centripetal wall 510b to prevent deformation of the outer race 510, so the cost is low. The durability of the one-way clutch 500 can be further improved, and the one-way clutch 500 can be operated more stably.

[Inner Race]

The inner race 520 may correspond to a ring shape and may be arranged coaxially with the outer race 510. The outer circumferential surface of the inner race 520 may contact the outer circumferential surface of the roller 532 included in the control unit 530.

The inner circumferential surface of the inner race 520 may be provided with a spline hub having a tooth shape that is fixed so as not to rotate with respect to the fixed end. The inner race 520 may be coupled to and fixed to the fixed end.

Meanwhile, unlike FIGS. 10 to 15, the inner race 520 may be integrally formed with the fixed end.

[Control unit]

The control unit 530 may include a roller 532, a support part 534 and a spring 536, and may be disposed between the outer race 510 and the inner race 520 in the circumferential direction.

However, it is not limited to this configuration. For example, unlike FIGS. 10 to 15, the control unit 530 may be configured to include a sprag instead of the roller 532.

If the relative rotation direction of the outer race 510 with respect to the inner race 520 is one direction, the control unit 530 may prevent the relative rotation of the outer race 510 and allow the outer race 510 to rotate in the other direction. have.

[Roller]

A plurality of rollers 532 may be disposed between the outer race 510 and the inner race 520 at a predetermined interval in the circumferential direction, and may correspond to a cylindrical shape. Further, the roller 532 may contact the inner circumferential surface of the outer race 510 and the outer circumferential surface of the inner race 520.

[Support]

The support part 534 may be disposed between the outer race 510 and the inner race 520 in the circumferential direction and may be integrally formed with the outer race 510.

The support portion 534 may be formed as many as the number of rollers 532, partition the rollers 532 and support the rollers 532 and the spring 536.

[spring]

The spring 536 may be coupled to one side of the support part 534 to elastically support the roller 532.

The spring 536 elastically supports the roller 532 so that the one-way clutch 500 can continue to rotate in any one direction.

16 to 18 are a rear view showing an outer race according to an embodiment of the present invention and a cross-sectional view AA′ of FIG. 16.

Referring to FIGS. 16 and 18, the outer race 510 includes a hollow portion 512 that is opened to one side in the axial direction, and the hollow portion 512 has a lightweight member 514 formed in a shape corresponding to the hollow portion 512. ) Can be installed.

At this time, the hollow portion 512 and the lightweight member 514 may be formed in a shape as shown in FIG. 17 or 18 in order to prevent the light weight member 514 from being separated from one side opened in the axial direction.

Specifically, as shown in FIG. 17, a groove 518 may be formed in at least one of radially inner or outer inner side of the hollow part 512, and the lightweight member 514 corresponds to the hollow part 512. It is formed in a shape and may be inserted into the groove 518.

In this way, a groove 518 is formed in at least one of the inside or outside in the radial direction on the inside of the hollow part 512, and the lightweight member 514 is formed in a shape corresponding to the hollow part 512 so that the groove 518 By being inserted into the lightweight member 514, even if pressure, impact, etc. are applied to the lightweight member 514, the durability of the one-way clutch 500 can be improved easily at low cost because the lightweight member 514 cannot easily leave the hollow part 512. And the one-way clutch 500 can operate stably.

In addition, as shown in FIG. 18, between one side of the hollow portion 512 in the open axial direction and the other side corresponding to the opposite side, there may be a region whose cross-sectional area decreases toward one side. In FIG. 18, the hollow part 512 is formed to have a smaller cross-sectional area from the entire area between the one side and the other side toward one side. The lightweight member 514 may be formed in a shape corresponding to the hollow part 512.

In this way, between one side in the open axial direction of the hollow part 512 and the other side, there is an area with a smaller cross-sectional area toward one side, and the lightweight member 514 is formed in a shape corresponding to the hollow part 512 Even if pressure, impact, etc. are applied to the member 514, the lightweight member 514 does not easily leave the hollow part 512, so the durability of the one-way clutch 500 can be improved easily at low cost, and the one-way clutch ( 500) can operate stably.

19 is a flowchart showing a method of manufacturing a torque converter according to an embodiment of the present invention.

Referring to FIG. 19, a method 600 for manufacturing a torque converter according to an embodiment may include a reactor body manufacturing step S610, an outer race manufacturing step S620, and a press fitting step S630.

In the reactor body manufacturing step (S610), the reactor body 410 may be manufactured.

In addition, the reactor body 410 may be manufactured to have a seating surface 412 on which one side of the outer race 510 is seated.

In addition, the reactor body 410 may be manufactured from a material that is lighter than the material of the outer race 510 pressed into the reactor body 410. For example, the reactor body 410 may be manufactured from a material containing magnesium.

In the outer race manufacturing step (S620), a ring-shaped outer race 510 may be manufactured. A plurality of teeth may be formed on the outer circumferential surface of the outer race 510.

In addition, the outer race 510 may be manufactured so that the hollow part 512 is formed therein. Specifically, a centrifugal wall 510a is manufactured on the outer side in the radial direction of the outer race 510, and a centripetal wall 510b is manufactured to be spaced apart from the centrifugal wall 510a in the radial direction, and thus A hollow portion 512 may be formed between the 510b.

In addition, the outer race 510 may be manufactured so that the hollow portion 512 extends along the circumferential direction of the outer race 510.

In addition, the outer race 510 may be manufactured so that the hollow part 512 is opened to one side in the axial direction.

A lightweight member 514 may be installed in the hollow part 512.

The lightweight member 514 may be formed of a material that is lighter than the material of the outer race 510 and may be formed in a shape corresponding to the hollow portion 512. For example, the lightweight member 514 may be formed of a thermoplastic plastic such as polycarbonate, and may be inserted into the hollow part 512 to be installed.

A groove 518 may be formed in at least one of radially inner or outer inner side of the hollow part 512, and the lightweight member 514 is formed in a shape corresponding to the hollow part 512 so that the groove 518 Can be inserted into

In addition, between one side of the open axial direction of the hollow portion 512 and the other side corresponding to the opposite side, a hollow portion 512 may be formed such that an area having a smaller cross-sectional area toward one side exists, and a lightweight member 514 May be formed in a shape corresponding to the hollow part 512.

The reinforcing bar 516 may be formed in the hollow portion 512 to connect the centrifugal wall 510a and the centripetal wall 510b.

The reinforcing bars 516 may be formed in the circumferential direction of the outer race 512 at intervals. In addition, three or more reinforcing bars 516 may be formed along the circumferential direction. In addition, the reinforcing bars 516 may be formed at equiangular intervals along the circumferential direction.

When the support part 534 is integrally formed with the outer race 510, the support part 534 may also be formed/manufactured together.

Meanwhile, a conventional outer race is manufactured/processed through a sintering process. The outer race 510 in which the hollow part 512, the reinforcement 516 or the groove 518 is formed can also be manufactured/processed through the sintering process, so the hollow part 512, the reinforcement 516 can be easily manufactured at low cost without additional processing Alternatively, an outer race 510 in which a groove 518 is formed may be formed.

In the press-fitting step (S630), the outer race 510 may be press-fit into the reactor body 410. At this time, as previously described, since the press-in stress of the outer race 510 is reduced, the inner circumferential surface of the reactor body 410 is protected even if the strength or hardness of the reactor body 410 is reduced, so that the outer race is easily and stably at low cost ( 510) can be installed.

In addition, the outer race 510 may be press-fit into the reactor body 410 so that the open side of the hollow part 512 faces the seating surface 412 of the reactor body 410.

Meanwhile, the one-way clutch 500 according to an embodiment of the present invention is not used only in the torque converter 10, but may be used in various parts such as a transmission.

As described above with reference to the drawings illustrated for the present invention, the present invention is not limited by the embodiments and drawings disclosed in the present specification, and various by a person skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformations can be made.

In addition, even if not explicitly described and described the operating effects according to the configuration of the present invention while describing the embodiments of the present invention, it is natural that the predictable effects by the configuration should also be recognized.

10: torque converter
100: front cover 200: impeller
300: turbine
400: reactor
410: reactor body 412: seating surface
420: reactor blade
430: retainer
500: one-way clutch
510: outer race
510a: distal wall 510b: centripetal wall
512: hollow part 514: lightweight member
516: reinforcement bar 518: groove
520: inner race
530: control unit 532: roller
534: support 536: spring
600: Torque converter manufacturing method

Claims (13)

An outer race 510 having a hollow part 512 formed therein;
An inner race 520 arranged coaxially with the outer race 510; And
Including; a control unit 530 disposed in the circumferential direction between the outer race 510 and the inner race 520,
The control unit 530 prevents or allows the relative rotation of the outer race 510 according to the relative rotation direction of the outer race 510 with respect to the inner race 520,
A one-way clutch 500, characterized in that a lightweight member 514 of a material that is lighter than that of the outer race 510 is installed in the hollow part 512.
The method according to claim 1,
The hollow part 512 is defined by a centrifugal wall 510a disposed radially outward of the outer race 510 and a centripetal wall 510b disposed radially inwardly from the centrifugal wall 510a,
The hollow part 512 is formed to extend along the circumferential direction of the outer race 510,
The lightweight member 514 is formed in a shape corresponding to the hollow portion 512 and is installed in the hollow portion 512, characterized in that the one-way clutch 500.
The method according to claim 2,
The outer race 510 includes a reinforcing bar 516 connecting the centrifugal wall 510a and the centripetal wall 510b to the hollow part 512.
The method of claim 3,
The reinforcing bars 516 are arranged in the circumferential direction of the outer race 512 at intervals.
The method of claim 4,
One-way clutch 500, characterized in that three or more reinforcement bars 516 are disposed along the circumferential direction.
The method of claim 4,
The reinforcing bars 516 are one-way clutch 500, characterized in that they are disposed at equal angles along the circumferential direction.
The method according to claim 1,
The hollow part 512 is a one-way clutch 500 that is opened to one side in the axial direction.
The method of claim 7,
A groove 518 is formed in at least one of radially inner or outer inner side of the hollow part 512,
The lightweight member 514 is formed in a shape corresponding to the hollow portion 512 and is inserted into the groove 518, characterized in that the one-way clutch 500.
The method of claim 7,
Between one side in the axial direction and the other side of the hollow part 512, there is a region in which the cross-sectional area decreases toward one side,
The lightweight member 514 is a one-way clutch 500, characterized in that formed in a shape corresponding to the hollow portion (512).
One-way clutch 500 of any one of claims 1 to 9; And
Including; a reactor 400 comprising a reactor body 410 into which the outer race 510 is press-fitted to the inner circumferential surface,
The reactor body 410 is a torque converter (10), characterized in that formed of a material that is lighter than the material of the outer race (510).
The method of claim 10,
The reactor body 410 includes a magnesium material, and the outer race 510 includes a steel material.
The method of claim 10,
The reactor body 410 has a seating surface 412 on which one side of the outer race 510 is seated,
The hollow part 512 is opened to one side of the outer race 510,
The outer race 510 is installed on the reactor body 410 such that an open side of the hollow part 512 faces the seating surface 412, a torque converter 10.
In the manufacturing method of the torque converter 10 of claim 10,
A reactor body manufacturing step (S610) of manufacturing the reactor body 410;
An outer race manufacturing step (S620) of manufacturing the outer race 510; And
Including; a press-fitting step (S630) of press-fitting the outer race 510 into the reactor body 410,
In the outer race manufacturing step (S620), the lightweight member 514 is insert-injected into the hollow portion 512, characterized in that the torque converter manufacturing method 600.

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