One-way clutch and rotary damper device equipped with one-way clutch

Provided are a one-way clutch and a rotary damper device equipped with the one-way clutch, in which size reduction can be achieved. A claw of a slide member has a retreat surface that abuts against an internal tooth of an outer member when the outer member turns toward one side with respect to an inner member and an engagement surface that abuts against the internal tooth when the outer member turns toward the other side with respect to the inner member. When the internal tooth and the retreat surface abut against each other, the slide member slides in a sliding direction, thus causing the claw to retreat from the internal tooth, and the outer member turns independently of the inner member. When the internal tooth and the engagement surface abut against each other, the internal tooth and the engagement surface are engaged, and the outer member and the inner member integrally turn.

CROSS REFERENCE TO RELATED APPLICATIONS

This is the U.S. national stage of application No. PCT/JP2017/046915, filed on Dec. 27, 2017. Priority under 35 U.S.C. § 119(a) and 35 U.S.C. § 365(b) is claimed from Japanese Application No. 2017-176913, filed Sep. 14, 2017, the disclosure of which is also incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to a one-way clutch and a rotary damper device equipped with the one-way clutch.

BACKGROUND ART

Conventionally, there is known a rotary damper that is provided at an opening/closing of a door or the like and is used to relieve an impact by slowly operating the door or the like biased in one of the opening and closing directions. In such a rotary damper, in order to generate a damping force only for turning in one direction, a rotary damper device equipped with a one-way clutch may be configured in combination with a one-way clutch.

For example, in a rotary damper device equipped with a one-way clutch described in Patent Literature 1, the one-way clutch is combined with the rotary damper device. The one-way clutch has an inner member coupled to a rotor shaft of a rotary damper and turns integrally with the rotor shaft, an outer member that accommodates the inner member such that the inner member can relatively turn, and a pair of planetary gears interposed between the inner member and the outer member.

In this one-way clutch, the planetary gear meshes with an inner gear formed on an inner peripheral surface of the outer member, and is accommodated in a recess formed in the inner member. The recess of the inner member includes a first wall which is disposed on one side in a turning direction of the inner member with respect to the planetary gear, and extends outward in a radial direction of the inner member, and a second wall which is disposed on the other side in the turning direction of the inner member with respect to the planetary gear, whose length extending outward in the radial direction of the inner member is about half of that of the first wall, and which has a corner at the extended end.

When the outer member turns toward one side (forward direction) with respect to the inner member, the planetary gear turned by the inner gear of the outer member abuts against the first wall, and idles while sliding on the first wall. In this case, since the first wall extends to the outside in the radial direction from a location where a tooth tip of the planetary gear abuts, the planetary gear idles on the first wall without meshing with an outer end of the first wall. As a result, even if the outer member turns, the inner member does not turn.

In contrast, when the outer member turns toward the other side (backward direction) with respect to the inner member, the planetary gear turned by the inner gear of the outer member moves toward the second wall, meshes with the corner of the second wall, and cannot turn. As a result, the inner member is engaged with the outer member via the planetary gear and turns integrally with the outer member.

CITATIONS LIST

Patent Literature

Patent Literature 1: JP-B2 5666376 Gazette SUMMARY OF INVENTION

Technical Problems

In the above-described one-way clutch, a plurality of planetary gears are interposed between the outer member and the inner member, and the planetary gears allow switching between a state in which the outer member and the inner member are engaged and a state in which the outer member and the inner member are not engaged.

However, since the one-way clutch described in Patent Literature 1 has a configuration in which the plurality of planetary gears are accommodated inside the outer member, the one-way clutch is large as a whole.

Accordingly, the present invention provides a one-way clutch and a rotary damper device equipped with the one-way clutch that can reduce the size of the one-way clutch.

Solutions to Problems

A one-way clutch and a rotary damper device equipped with the one-way clutch that solve the above problem have the following characteristics.

That is, the one-way clutch provided in the rotary damper device equipped with the one-way clutch includes an inner member that has a first insertion hole formed along a direction of an axis, an outer member that has a cylindrical shape, accommodates the inner member such that the inner member is turnable about the axis, and has a plurality of internal teeth which project inward in a radial direction from an inner peripheral surface facing an outer peripheral surface of the inner member, and a slide member that is provided on the inner member such that the slide member is slidable in the radial direction perpendicular to the direction of the axis and has claws which are provided at both ends in the radial direction and project outward in the radial direction, in which a dimension between a front end of one of the claws and a front end of the other of the claws is greater than a diameter of a circle that passes through front ends of the plurality of internal teeth and is centered on the axis, each of the claws has a retreat surface that abuts against each of the plurality of internal teeth when the outer member turns toward one side with respect to the inner member, and an engagement surface that abuts against each of the plurality of internal teeth when the outer member turns toward the other side with respect to the inner member, and when each of the plurality of internal teeth and the retreat surface abut against each other, the slide member slides in a sliding direction to cause each of the claws to retreat from each of the plurality of internal teeth, and the outer member turns independently of the inner member, and when each of the plurality of internal teeth and the engagement surface abut against with each other, each of the plurality of internal teeth and the engagement surface are engaged with each other and the outer member and the inner member integrally turn.

Furthermore, the retreat surface is formed as an inclined surface that is inclined toward a downstream side in a turning direction of the outer member toward the one side as proceeding outward in the radial direction, and the engagement surface is formed as an inclined surface that is inclined toward an upstream side in a turning direction of the outer member toward the other side as proceeding toward a surface perpendicular to the turning direction of the outer member toward the other side or as proceeding outward in the radial direction.

Furthermore, each of the plurality of internal teeth has a first surface that abuts against each of the claws when the outer member turns toward the one side with respect to the inner member, and a second surface that abuts against each of the claws when the outer member turns toward the other side with respect to the inner member, the first surface is formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member toward the one side as proceeding outward in the radial direction, and the second surface is formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member toward the other side as proceeding toward a surface perpendicular to the turning direction of the outer member toward the other side or as proceeding outward in the radial direction.

Furthermore, a rotary damper device equipped with a one-way clutch, the rotary damper device includes the one-way clutch according to any one of aspects1to3, and a rotary damper device that includes a housing, a rotor having a rotor blade that is turnably accommodated in the housing and a rotor shaft that extends along a turning axis of the rotor blade and is inserted into a first insertion hole of the one-way clutch, and a viscous body that is enclosed in the housing and imparts turning resistance to the rotor blade, in which the inner member of the one-way clutch and the rotor of the rotary damper device are integrally turnable.

Furthermore, the slide member has a second insertion hole formed along the direction of the axis, and the rotor shaft is inserted into the second insertion hole.

Furthermore, the second insertion hole has a guide surface that guides the slide member in the sliding direction.

Advantageous Effects of Invention

According to the present invention, it is possible to reduce the size of the one-way clutch and the rotary damper device equipped with the one-way clutch.

DESCRIPTION OF EMBODIMENTS

Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.

First Embodiment of One-Way Clutch

A one-way clutch1illustrated inFIGS. 1 to 4is an embodiment of a one-way clutch according to the present invention, and includes an outer member10, an inner member20, a slide member30, and a lid member40.

The outer member10has an outer body11formed in a bottomed cylindrical shape having a bottom plate11aon one end side in a direction of an axis P (seeFIG. 4) and having an opening on the other end side in the direction of the axis P, an external teeth gear12having a plurality of external teeth12aformed on an outer peripheral surface of the outer body11and projecting outward in the radial direction, and a plurality of internal teeth13formed on an inner peripheral surface of the body11and projecting inward in the radial direction. A circular fitting hole11bpenetrating the bottom plate11ain the direction of the axis P is formed. The hole center of the fitting hole11bmatches the axis P. The radial direction of the outer body11is a direction perpendicular to the direction of the axis P.

The outer member10is configured to be turnable toward one side (clockwise direction inFIGS. 1, 3, and 4) about the axis P and toward the other side opposite to the one side (counterclockwise direction inFIGS. 1, 3, and 4).

The internal tooth13has a first surface13adisposed on a downstream side in a turning direction of the outer member10toward the one side, and a second surface13bdisposed on an upstream side with respect to the first surface13ain the turning direction of the outer member10toward the one side. The first surface13ais formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member10toward the one side as proceeding outward in the radial direction. The first surface13ais formed in an arc shape that is concave toward the outside. The second surface13bis formed on a surface perpendicular to the turning direction of the outer member10toward the other side.

The internal teeth13are disposed at equal intervals along a peripheral direction of the outer member10. The internal teeth13are formed such that the center of a circle C passing through a front end of each internal tooth13(a boundary between the first surface13aand the second surface13b) is the axis P.

The inner member20has an inner body21formed of a disk-shaped member, and a columnar fitting protrusion22(seeFIGS. 2 and 9) that projects from one surface of the inner body21to the one end side in the direction of the axis P, and a groove23formed on the other surface of the inner body21. The inner body21and the fitting protrusion22are coaxially disposed, and are configured to be integrally turnable about the axis P.

The groove23is a groove extending along the radial direction of the inner body21, and is formed from one end to the other end of the inner body21in an extending direction of the groove23.

A first insertion hole21athat penetrates the inner member20(the inner body21and the fitting protrusion22) in the direction of the axis P is formed in a portion of the inner member20where the groove23is formed.

The first insertion hole21ais formed along the direction of the axis P. The first insertion hole21ais formed in a long hole shape in which the extending direction of the groove23is a longitudinal direction. The axis P is the axis of the first insertion hole21aand passes through the center of the first insertion hole21a. A shaft such as a rotor shaft of a rotary damper device can be inserted into the first insertion hole21a.

The groove23has a pair of side surfaces23aformed along the extending direction of the groove23. A guide piece24is formed on each side surface23a. The guide piece24is formed along the extending direction of the groove23.

In the inner member20, an outer diameter of the inner body21is formed so as to be approximately the same as or slightly smaller than a diameter of the circle C.

The inner member20is accommodated in the outer member10, and the fitting protrusion22of the inner member20accommodated in the outer member10is turnably fitted in the fitting hole11bof the outer member10. The inner member20and the outer member10are configured to be relatively turnable about the axis P. The outer peripheral surface of the inner body21accommodated in the outer member10faces the internal teeth13of the outer member10.

The slide member30is formed of a plate-like member, and is provided in the groove23of the inner member20so as to be slidable along the extending direction of the groove23. That is, the slide member30is configured to be slidable in the radial direction of the inner member20perpendicular to the direction of the axis P.

The guide piece24formed on the side surface23aof the groove23guides the slide member30in the sliding direction and restricts movement of the slide member30in the direction of the axis P. The slide member30is configured to be turnable integrally with the inner member20about the axis P.

At both ends of the slide member30in the sliding direction, claws31projecting outward in the radial direction from the both ends are formed.

The claw31has a retreat surface31adisposed on the upstream side in the turning direction of the outer member10toward the one side and an engagement surface31bdisposed on the downstream side with respect to the retreat surface31ain the turning direction of the outer member10toward the one side. The retreat surface31ais formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member10toward the one side as proceeding outward in the radial direction. The retreat surface31ais formed in an arc shape that is convex toward the outside. The engagement surface31bis formed on a surface perpendicular to the turning direction of the outer member10toward the other side.

As illustrated inFIG. 4, a dimension L between a front end of one claw31and a front end of the other claw31in the slide member30is formed greater than a diameter R of the circle C. Therefore, in the one-way clutch1, at least any one of the claws31is located outside the circle C in the radial direction regardless of the slide position of the slide member30relative to the inner member20.

The slide member30is formed with a second insertion hole32penetrating in the direction of the axis P. The second insertion hole32is formed along the direction of the axis P. The second insertion hole32is formed in a long hole shape in which the extending direction of the groove23in the inner member20is the longitudinal direction. A dimension of the second insertion hole32in the longitudinal direction is formed greater than a longitudinal dimension of the first insertion hole21a. In the second insertion hole32, a pair of surfaces extending in the longitudinal direction is configured as guide surfaces32a,32a, and the guide surfaces32a,32aare disposed in parallel to each other. A shaft such as the rotor shaft of the rotary damper device can be inserted into the second insertion hole32.

The lid member40is formed of a disk-shaped member, and is a member that closes the opening of the outer body11. The lid member40closes the opening of the outer body11in a state in which the inner member20is accommodated in the outer member10and the slide member30is provided on the inner member20.

The one-way clutch1configured as described above operates as follows.

Note that in the following description of the operation of the one-way clutch1, out of the claws31formed at both ends of the slide member30, one claw31is referred to as a claw311and the other claw31is referred to as a claw312. Furthermore, the internal teeth13of the outer member10are appropriately referred to as an internal tooth131, an internal tooth132, an internal tooth133, and an internal tooth134in the order of abutting against the claws31when the outer member10is turned toward the one side.

A case where the outer member10turns toward the one side with respect to the inner member20will be described.

FIG. 5Aillustrates a state in which the claw311is located outside the circle C in the radial direction, and the claw312does not protrude to the outside of the circle C in the radial direction. In the state illustrated inFIG. 5A, the internal tooth131is located upstream of the claw311in the turning direction of the outer member10toward the one side.

When the outer member10turns toward the one side with respect to the inner member20in this state, the internal tooth131of the outer member10abuts against the claw311. When the outer member10turns toward the one side after the internal tooth131abuts against the claw311, the claw311is pressed by the internal tooth131, and the claw311retreats from the internal tooth131inward in the radial direction, and the slide member30slides toward the claw312.

In this case, the first surface131aof the internal tooth131abuts against the retreat surface311aof the claw311; however, since the retreat surface311ais formed as an inclined surface inclined toward the downstream side in the turning direction of the outer member10toward the one side as proceeding outward in the radial direction, the claw311can smoothly retreat from the internal tooth131when the outer member10turns toward the one side.

In addition, since the first surface131aof the internal tooth131is formed as an inclined surface inclined toward the downstream in the turning direction of the outer member10toward the one side as proceeding outward in the radial direction, the claw311can more smoothly retreat from the internal tooth131.

As illustrated inFIG. 5B, when the claw311is pressed by the internal tooth131of the outer member10turning toward the one side, the slide member30slides toward the claw312until the claw311does not protrude to the outside of the circle C.

After the slide member30slides until the claw311does not protrude to the outside of the circle C, the internal tooth131does not mesh with the claw311and moves downstream of the turning direction of the outer member10toward the one side with respect to the claw311.

When the slide member30is in a slide position where the claw311does not protrude to the outside of the circle C, the claw312protrudes to the outside of the circle C.

As illustrated inFIG. 6, when the outer member10further turns toward the one side, the internal tooth132of the outer member10abuts against the claw312located on the side opposite to the claw311. When the outer member10turns toward the one side after the internal tooth132abuts against the claw312, the claw312is pressed by the internal tooth132, the claw312retreats from the internal tooth132inward in the radial direction, and the slide member30slides toward the claw311.

The slide member30slides until the claw312does not protrude to the outside of the circle C. Then, the internal tooth132does not mesh with the claw312and moves downstream of the turning direction of the outer member10toward the one side with respect to the claw312.

Thereafter, when the outer member10further turns toward the one side, the internal tooth133of the outer member10abuts against the claw311, and the slide member30slides toward the claw312until the claw311does not protrude to the outside of the circle C. When the outer member10further turns toward the one side, the internal tooth134of the outer member10abuts against the claw312, and the slide member30slides toward the claw311until the claw312does not protrude to the outside of the circle C.

Thus, in a case where the outer member10turns toward the one side, the internal teeth13of the outer member10alternately abut against the claw311and the claw312of the slide member30. When the internal teeth13abut against the claws311,312, the claws311,312retreat from the internal teeth13and the slide member30slides alternately toward the claw312and toward the claw3111in the sliding direction. Accordingly, the outer member10turns independently of the inner member20without the internal teeth13of the outer member10engaging with the claws311,312of the slide member30.

Next, a case where the outer member10turns toward the other side with respect to the inner member20will be described.

FIG. 7Aillustrates a state in which the claw311is located outside the circle C, and the claw312does not protrude to the outside of the circle C. In the state illustrated inFIG. 7A, the internal tooth131is located upstream of the claw311in the turning direction of the outer member10toward the other side.

When the outer member10turns toward the other side with respect to the inner member20from this state, as illustrated inFIG. 7B, the internal tooth131of the outer member10abuts against the claw311and the internal tooth131and the claw311are engaged.

When the outer member10turns toward the other side after the internal tooth131and the claw311are engaged, the slide member30does not slide in the sliding direction, the engagement state between the internal tooth131and the claw311is maintained, and the inner member20turns integrally with the outer member10.

In this case, the second surface131bof the internal tooth131abuts against the engagement surface311bof the claw311. Since the engagement surface311bis formed as a surface perpendicular to the turning direction of the outer member10toward the other side, when the outer member10turns toward the other side with respect to the inner member20, the engagement state between the internal tooth131and the claw31is easily maintained.

Further, since the second surface131bof the internal tooth131is formed as a surface perpendicular to the turning direction of the outer member10toward the other side, the internal tooth131and the claw311can be reliably engaged.

In the one-way clutch1, the dimension L between the front end of the claw311and the front end of the claw312in the slide member30is formed greater than the diameter R of the circle C, and at least one of the claws311,312is located outside the circle C. Therefore, in a case where the outer member10turns toward the other side with respect to the inner member20, the engagement surface311bof the claw311or the engagement surface312bof the claw312is reliably engaged with the second surface13bof the internal tooth13and therefore the outer member10and the inner member20can turn integrally, regardless of the slide position of the slide member30.

In the one-way clutch1, the claws31of the slide member30slidably provided on the inner member20allow switching between the state in which the outer member10and the inner member20are engaged with each other, and the state in which the outer member10and the inner member20are not engaged with each other. Therefore, as compared to, for example, the case of configuring a one-way clutch in which a plurality of planetary gears are accommodated inside an outer member, it is possible to reduce the size of the one-way clutch1. In particular, it is possible to make the dimension of the one-way clutch1in the direction of the axis P smaller.

Next, a rotary damper device100with a one-way clutch will be described.

The rotary damper device100equipped with a one-way clutch can be configured by mounting the one-way clutch1on a rotary damper device5illustrated inFIG. 8.

As illustrated inFIGS. 8 and 9, the rotary damper device5includes a housing50, a rotor60, a lid body54, and a viscous body56.

The housing50is formed in a bottomed cylindrical shape and has a bottom surface51. A columnar support shaft52that projects along the axis of the housing50is formed at the center of the bottom surface51. An opening53is formed at the end of the housing50opposite to the bottom surface51in the direction of the axis.

The rotor60has a rotor blade61formed in a substantially disk shape, and a rotor shaft62extending from the center of the rotor blade61along the direction of the turning axis.

The rotor blade61is turnably accommodated in the housing50. A bearing hole63is formed on the opposite side of the rotor shaft62in the center of the rotor blade61. Since the bearing hole63is turnably fitted to the support shaft52, the rotor60is turnably supported by the housing50.

The lid body54closes the opening53of the housing50. A through hole54athat is a circular hole coaxial with the support shaft52is formed at the center of the lid body54.

The rotor shaft62projects from the rotor blade61accommodated in the housing50to the outside of the housing50through the through hole54a. A portion of the rotor shaft62that projects outside the housing50is formed in a substantially quadrangular prism shape.

The viscous body56is enclosed in the housing50. The viscous body56is made of a fluid having viscosity such as silicone oil. The viscous body56imparts turning resistance to the rotor blade61that is accommodated in the housing50and turns.

The magnitude of the turning resistance imparted to the rotor blade61can be adjusted by appropriately changing the viscosity of the viscous body56or the shape of the rotor blade61.

A seal member58such as an O-ring is interposed between the rotor shaft62and the lid body54to prevent the viscous body56from leaking from between the rotor shaft62and the lid body54.

The rotary damper device100equipped with the one-way clutch is configured by inserting the rotor shaft62of the rotary damper device5configured as described above into the first insertion hole21ain the inner member20of the one-way clutch1and the second insertion hole32in the slide member30of the one-way clutch1and connecting the rotary damper device5and the one-way clutch1.

The hole shape of the first insertion hole21ain the inner member20is formed in a shape corresponding to the shaft shape of the rotor shaft62, and the inner member20and the rotor shaft62are integrally turnable about the turning axis of the rotor shaft62. In a state where the rotor shaft62is inserted into the first insertion hole21a, the turning axis of the rotor shaft62and the axis P of the one-way clutch1match.

The cross-sectional shape of the rotor shaft62viewed from the turning axis direction of the rotor shaft62is formed in a substantially rectangular shape, and a pair of longitudinal surfaces62a,62aextending in the longitudinal direction is disposed in parallel to each other.

The dimension in a lateral direction of the rotor shaft62and the dimension in the lateral direction of the second insertion hole32are formed to be substantially the same.

In a state where the rotor shaft62is inserted into the second insertion hole32, the longitudinal surface62aof the rotor shaft62and the guide surface32aof the second insertion hole32are in sliding contact.

Therefore, when the slide member30slides with respect to the inner member20, the slide operation of the slide member30is guided by the guide surface32aof the second insertion hole32into which the rotor shaft62is inserted. As a result, it is possible to stabilize the sliding operation when the slide member30slides.

That is, the guide surface32aof the second insertion hole32functions as a guide surface that guides the slide member30in the sliding direction.

In the rotary damper device100equipped with the one-way clutch, the rotor shaft62of the rotary damper device5is inserted not only into the first insertion hole21aof the inner member20but also into the second insertion hole32of the slide member30. Therefore, it is possible to keep the overall dimension in the height direction (direction of the axis P) small.

In the rotary damper device100equipped with the one-way clutch configured as described above, when the outer member10is turned toward the one side with respect to the inner member20, the outer member10turns independently of the inner member20, and the inner member20does not turn.

In this case, since also the rotor shaft62connected to the inner member20does not turn, the outer member10turns without being given turning resistance.

In contrast, when the outer member10is turned toward the other side with respect to the inner member20, the outer member10and the inner member20turn integrally. When the inner member20turns, the rotor shaft62turns integrally with the inner member20. Therefore, the turning resistance imparted to the rotor shaft62when the rotor shaft62turns is also transmitted to the outer member10.

Thus, when the outer member10turns toward the other side with respect to the inner member20, the turning resistance is imparted to the outer member10.

In this case, in the one-way clutch1, the outer member10and the inner member20can reliably turn integrally regardless of the slide position of the slide member30. Therefore, it is possible to reliably apply the load in the turning direction generated by the rotary damper device100to the outer member10.

In addition, since the one-way clutch1can be configured in a small size, it is possible to reduce the overall size of the rotary damper device100equipped with the one-way clutch configured by connecting the one-way clutch1to the rotary damper device5.

Second Embodiment of One-Way Clutch

The one-way clutch1can also be configured as follows.

A one-way clutch7of the present embodiment has an outer member70, an inner member80, and a slide member90in lieu of the outer member10, the inner member20, and the slide member30according to the one-way clutch1of the first embodiment.

As illustrated inFIG. 10, the outer member70is formed in a bottomed cylindrical shape having an outer body71that has a bottom plate71aon one end side in a direction of an axis P and having an opening on the other end side in the direction of the axis P, and accommodates the inner member80such that the inner member80can turn about the axis P, an external teeth gear72that has a plurality of external teeth72aformed on an outer peripheral surface of the outer body71and projecting outward in a radial direction, and a plurality of internal teeth73that are formed on an inner peripheral surface of the body71and project inward in the radial direction.

The internal tooth73has a first surface73adisposed on a downstream side in a turning direction of the outer member70toward one side, and a second surface73bdisposed on an upstream side with respect to the first surface73ain the turning direction of the outer member70toward the one side. The first surface73ais formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member70toward the one side as proceeding outward in the radial direction. The second surface73bis formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member70toward the other side as proceeding outward in the radial direction.

The inner member80has an inner body81formed of a disk-shaped member and a groove83formed in the inner body81. The inner body81is configured to be turnable about the axis P.

The groove83is a groove extending along the radial direction of the inner body81, and is formed from one end to the other end of the inner body81in an extending direction of the groove83.

An insertion hole into which the rotor shaft62of the rotary damper device5is inserted is formed in a surface of the inner member80opposite to a surface in which the groove83is formed. The axis P is the axis of the insertion hole and passes through the center of the insertion hole.

The inner member80is accommodated in the outer member70so as to be turnable about the axis P. The outer peripheral surface of the inner body81accommodated in the outer member70faces the internal teeth73of the outer member70.

The inner member80does not have the guide piece24formed in the groove23of the inner member20in the first embodiment.

The slide member90is formed of a plate-like member, and is provided in the groove83of the inner member80so as to be slidable along the extending direction of the groove83. That is, the slide member90is configured to be slidable in the radial direction of the inner member80perpendicular to the direction of the axis P.

The slide member90is configured to be turnable integrally with the inner member80about the axis P.

At both ends of the slide member90in a sliding direction, claws91projecting outward in the radial direction from the both ends are formed.

The claw91has a retreat surface91adisposed on the upstream side in the turning direction of the outer member70toward the one side, and an engagement surface91bdisposed on the downstream side with respect to the retreat surface91ain the turning direction of the outer member70toward the one side. The retreat surface91ais formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member70toward the one side as proceeding outward in the radial direction. The engagement surface91bis formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member70toward the other side as proceeding outward in the radial direction.

The slide member90is formed thinner (the dimension in the direction perpendicular to the sliding direction is smaller) than the slide member30in the first embodiment. The second insertion hole32formed in the slide member30in the first embodiment is not formed in the slide member90.

Other configurations of the one-way clutch7are similar to the configurations of the one-way clutch1in the first embodiment, and thus the description thereof is omitted.

In the one-way clutch7of the present embodiment, the second surface73bof the internal tooth73of the outer member70is formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member70toward the other side as proceeding outward in the radial direction. The engagement surface91bof the claw91of the slide member90is formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member70toward the other side as proceeding outward in the radial direction.

Accordingly, when the outer member70turns toward the other side with respect to the inner member80and the second surface73bof the internal tooth73and the engagement surface91bof the claw91abut against each other, the internal tooth73and the claw91can be reliably engaged.

Effects in the Present Embodiment

In the present embodiment, the rotary damper device100equipped with a one-way clutch includes the following one-way clutch1.

That is, the one-way clutch includes the inner member20that has the first insertion hole21aformed along the direction of the axis P, the cylindrical outer member10that accommodates the inner member20such that the inner member20can turn about the axis P, and has the plurality of internal teeth13which project inward in the radial direction from the inner peripheral surface facing the outer peripheral surface of the inner member20, and the slide member30that is provided on the inner member20such that the slide member30is slidable in the radial direction perpendicular to the direction of the axis P and has the claws31which project outward in the radial direction and provided at both ends in the radial direction. The dimension L between the front end of one of the claws31and the front end of the other of the claws31is greater than the diameter of the circle C that passes through the front ends of the plurality of internal teeth13and is centered on the axis P. The claw31has the retreat surface31athat abuts against the internal tooth13when the outer member10turns toward the one side with respect to the inner member20, and the engagement surface31bthat abuts against the internal tooth13when the outer member10turns toward the other side with respect to the inner member20. When the internal tooth13and the retreat surface31aabut against each other, the slide member30slides in the sliding direction, thus causing the claw31to retreat from the internal tooth13, and the outer member10turns independently of the inner member20. When the internal tooth13and the engagement surface31babut against with each other, the internal tooth13and the engagement surface31bare engaged, and the outer member10and the inner member20integrally turn.

Thus, the internal teeth13of the outer member10and the claws31of the slide member30slidably provided on the inner member20allow switching between the state in which the outer member10and the inner member20are engaged with each other and the state in which the outer member10and the inner member20are not engaged with each other. Therefore, as compared to, for example, the case of configuring a one-way clutch in which a plurality of planetary gears are accommodated inside an outer member, it is possible to reduce the size of the one-way clutch1.

Furthermore, the retreat surface31ais formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member10toward the one side as proceeding outward in the radial direction. The engagement surface31bis formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member10toward the other side as proceeding toward the surface perpendicular to the turning direction of the outer member10toward the other side, or as proceeding outward in the radial direction.

As a result, the claw31can smoothly retreat from the internal tooth13when the outer member10turns toward the one side, and the engagement state between the internal tooth13and the claw31is easily maintained when the outer member10turns toward the other side.

The internal tooth13has the first surface13athat abuts against the claw31when the outer member10turns toward the one side with respect to the inner member20, and the second surface13bthat abuts against the claw31when the outer member10turns toward the other side with respect to the inner member20. The first surface13ais formed as an inclined surface that is inclined toward the downstream side in the turning direction of the outer member10toward the one side as proceeding outward in the radial direction. The second surface13bis formed as an inclined surface that is inclined toward the upstream side in the turning direction of the outer member10toward the other side as proceeding toward the surface perpendicular to the turning direction of the outer member10toward the other side, or as proceeding outward in the radial direction.

As a result, the claw31can further smoothly retreat from the internal tooth13when the outer member10turns toward the one side, and the internal tooth13and the claw31are reliably engaged when the outer member10turns toward the other side.

Furthermore, the one-way clutch1and the rotary damper device5are provided, the rotary damper device5including the housing50, the rotor60having the rotor blade61turnably accommodated in the housing50and the rotor shaft62extending along the turning axis of the rotor blade61and inserted into the first insertion hole21aof the one-way clutch1, and the viscous body56that is enclosed in the housing50and imparts turning resistance to the rotor blade61. The inner member20of the one-way clutch1and the rotor60of the rotary damper device5can integrally turn.

Since the one-way clutch1can be configured in a small size, it is possible to reduce the overall size of the rotary damper device100equipped with the one-way clutch configured by connecting the one-way clutch1to the rotary damper device5in the manner described above.

The slide member30has the second insertion hole32formed along the direction of the axis P, and the rotor shaft62is inserted into the second insertion hole32.

Accordingly, the dimension of the rotary damper device100equipped with the one-way clutch in the direction of the axis P can be kept small.

The second insertion hole32has the guide surface32athat guides the slide member30in the sliding direction.

As a result, it is possible to stabilize the sliding operation when the slide member30slides.

INDUSTRIAL APPLICABILITY

The present invention is used for the one-way clutch and the rotary damper device equipped with the one-way clutch.

REFERENCE SIGNS LIST