JP2020008094A - One-way clutch and rotary damper device with one-way clutch - Google Patents

Abstract

To provide a one-way clutch and a rotary damper device with the one-way clutch capable of suppressing run-out to a shaft center of a gear, while supporting the gear of the one-way clutch by a shaft with a simple structure.SOLUTION: A groove portion 214 is formed on one of an outer peripheral surface of a rotor shaft 20 and an inner peripheral surface of a gear main body 51 in a gear member 50, a projecting portion 55 fittable to the groove portion 214 is formed on the other of the outer peripheral surface of the rotor shaft 20 and the inner peripheral surface of the gear main body 51 of the gear member 50, the rotor shaft 20 has a fitting portion 22 fitted to the inner peripheral surface of the gear main body 51 at a position separating from the groove portion 214 formed on the rotor shaft 20 or the projecting portion 55 in a shaft center P direction, the groove portion 214 and the projecting portion 55 are fitted to each other, and the fitting portion 22 is fitted to the inner peripheral surface of the gear main body 51, thus the gear member 50 is supported by the rotor shaft 20.SELECTED DRAWING: Figure 4

Description

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

  2. Description of the Related Art Conventionally, there has been known a rotary damper which is provided at an opening / closing portion of a door or the like and is used for slowly operating a door or the like urged in one of an opening direction and a closing direction to reduce an impact. In such a rotary damper, in order to generate a damping force only in one direction of rotation, a rotary damper device with a one-way clutch is configured in combination with a one-way clutch having a gear to which a driving force is input. There is.

  For example, in a rotary damper device 1 with a one-way clutch described in Patent Document 1, an inner member 35 that is coupled to a rotor shaft 29 of the rotary damper 2 and rotates integrally with the rotor shaft 29, and relatively rotates the inner member 35 A one-way clutch 3 having an outer member 36 housed as possible and having an outer gear 64 formed on an outer peripheral surface thereof and a pair of planetary gears 37 interposed between the inner member 35 and the outer member 36 is provided with a rotary damper. Combined with 2.

  In this one-way clutch 3, the planetary gear meshes with an internal gear 63 formed on the inner peripheral surface of the outer member 36 and is housed in a recess 47 formed in the inner member 35. The concave portion 47 of the inner member 35 is disposed on one side in the rotation direction of the inner member 35 with respect to the planetary gear 37, and extends first radially outward of the inner member 35, and the inner member 35 with respect to the planetary gear 37. And a second wall 46 having a radially outwardly extending length of the inner member 35 that is about half of the first wall 45 and a corner at the extended end. ing.

  When the outer member 36 rotates in one direction (positive direction) with respect to the inner member 35, the planetary gear 37 rotated by the internal gear 63 of the outer member 36 comes into contact with the first wall 45, and the first member 45 rotates. It idles while sliding on the wall 45. In this case, since the first wall 45 extends radially outward from the position where the tooth tip of the planet gear 37 abuts, the planet gear 37 does not mesh with the outer end of the first wall 45, and Idling on the wall 45. Thereby, even if the outer member 36 rotates, the inner member 35 does not rotate.

  On the other hand, when the outer member 36 rotates to the other side (negative direction) with respect to the inner member 35, the planetary gear 37 rotated by the internal gear 63 of the outer member 36 moves to the second wall 46 side and It meshes with the corner of the two walls 46 and cannot rotate. As a result, the inner member 35 is engaged with the outer member 36 via the planetary gear 37 and rotates integrally with the outer member 36.

  In the one-way clutch 3 configured as described above, the support shaft 42 of the inner member 35 is inserted into the through hole 66 of the outer member 36 while slidingly contacting the same, and the ridge 52 of the inner member 35 is inserted into the annular groove of the outer member 36. The outer member 36 is supported so as to be relatively rotatable in the circumferential direction with respect to the inner member 35 by fitting to the inner member 65. That is, the outer member 36 is supported by the rotor shaft 29 via the inner member 35.

Japanese Patent No. 5666376

As described above, in the one-way clutch 3, since the outer member 36 is supported by the rotor shaft 29 via the inner member 35, the support structure of the outer member 36 with respect to the rotor shaft 29 is complicated.
When the outer member 36 is directly supported by the rotor shaft 29 in order to simplify the support structure of the outer member 36 with respect to the rotor shaft 29, the outer member 36 has a through hole 66 fitted to the rotor shaft 29. Only the portion is supported by the rotor shaft 29. As a result, the deflection of the outer member 36 with respect to the axis of the rotor shaft 29 increases, which may hinder the smooth operation of the one-way clutch 3.

  Accordingly, the present invention provides a one-way clutch and a rotary damper device with a one-way clutch, which is capable of supporting a gear of a one-way clutch with a shaft having a simple structure and suppressing run-out with respect to the shaft center of the gear. .

A one-way clutch and a rotary damper device with a one-way clutch that solve the above problems have the following features.
That is, the one-way clutch provided in the rotary damper device with a one-way clutch is supported on the rotating shaft rotatable about an axis, and slidably supported on the rotating shaft in a radial direction orthogonal to the axial direction. A slide member that is rotatable integrally with the rotation axis about a center, and has a claw portion that protrudes radially outward at both ends in a slide direction; and a rotation member that relatively rotates about the axis about the rotation axis. A cylindrical member movably supported to accommodate the slide member, a plurality of external teeth projecting radially outward from an outer peripheral surface of the cylindrical member, and projecting radially inward from an inner peripheral surface of the cylindrical member; A gear member having a plurality of internal teeth, and a groove is formed on one of an outer peripheral surface of the rotary shaft and an inner peripheral surface of the cylindrical member in the gear member, and an outer peripheral surface of the rotary shaft, And a protrusion that can be fitted to the groove is formed on the other of the inner peripheral surfaces of the cylindrical member in the gear member, and the rotating shaft is configured such that the shaft is formed from the groove or the protrusion formed on the rotating shaft. At a position distant in the direction of the center, there is a fitting portion fitted to the inner peripheral surface of the cylindrical member, and the groove portion and the projection are fitted together, and the fitting portion is formed of the cylindrical member. The gear member is supported by the rotating shaft by fitting to the inner peripheral surface, and the dimension between the tip of one of the claw portions and the tip of the other claw portion is the tip of the plurality of internal teeth. The claw portion is formed to be larger than the diameter of a circle centered on the axis, the claw portion is a retreating surface that comes into contact with the internal teeth by rotating the gear member to one side with respect to the rotation shaft, When the gear member rotates to the other side with respect to the rotation axis, the gear member A contact surface between the internal teeth and the retreating surface when the gear member rotates to one side, the slide member slides in the sliding direction, and the claw portion is moved to the internal teeth. And the gear member rotates independently of the rotating shaft, and when the gear teeth rotate to the other side, the internal teeth and the engagement surface come into contact with each other. The mating surfaces engage to rotate the gear member and the rotating shaft integrally.
Thus, the gear member can be supported by the rotating shaft with a simple structure, and the deflection of the gear member with respect to the axis of the rotating shaft can be suppressed.

The rotary shaft has a through hole that penetrates in the radial direction and through which the slide member is slidably inserted.
This makes it possible to support the slide member with a simple configuration.

Further, the rotating shaft has a plurality of shaft pieces divided in a circumferential direction by a slit formed along the axial direction from a tip end of the rotating shaft, and the groove is formed of the shaft piece. It is formed on the outer peripheral surface.
Thus, when the projection of the gear member is fitted into the groove of the rotary shaft, the shaft piece is bent, and the fitting operation can be facilitated.

Further, the retreating surface is formed as an inclined surface that inclines to the downstream side in the direction of rotation to one side of the gear member as going radially outward, and the engaging surface rotates to the other side of the gear member. The gear member is formed on a surface that is orthogonal to the direction, or an inclined surface that is inclined toward the upstream side in the rotational direction toward the other side of the gear member as going outward in the radial direction.
Accordingly, the claw portion can be smoothly retracted from the internal teeth with the rotation of the gear member toward one side. Further, when the gear member rotates to the other side with respect to the rotation shaft, the engagement state between the internal teeth and the claw portions can be easily maintained.

In addition, the internal teeth are configured such that the gear member rotates to one side with respect to the rotation axis, and the first surface that contacts the claw portion, and the gear member rotates to the other side with respect to the rotation axis. A second surface contacting the claw portion, and the first surface is formed on an inclined surface that inclines to a downstream side in a rotation direction toward one side of the gear member as going radially outward, The second surface is formed as an inclined surface that inclines toward the upstream side in the rotational direction toward the other side of the gear member as going radially outward.
Thereby, when the gear member rotates to one side, it is possible to further smoothly retreat the claw portion from the internal teeth. Also, when the gear member rotates to the other side with respect to the rotation shaft, the internal teeth and the claw portion can be reliably engaged.

Also, a rotary damper device with a one-way clutch, wherein the one-way clutch according to any one of claims 1 to 6, a housing into which the rotating shaft of the one-way clutch is inserted, and a housing in the housing A rotor blade rotatable integrally with the rotating shaft about the axis; and a viscous fluid sealed in the housing to impart rotational resistance to the rotor blade.
Thus, the number of external teeth of the gear member can be reduced. Therefore, when the gear that transmits the rotational force to the rotary shaft is meshed with the external teeth, the rotational speed of the rotary shaft generated in the rotary damper device with the one-way clutch can be increased by increasing the rotational speed of the rotary shaft, The usability of the rotary damper device with the one-way clutch connected to the one-way clutch can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, while supporting a gear member with a simple structure by a rotating shaft, the run-out of the gear member with respect to the axial center of a rotating shaft can be suppressed.

FIG. 2 is a perspective view showing a rotary damper device with a one-way clutch. It is a top view which shows the rotary damper apparatus with a one-way clutch. FIG. 2 is an exploded perspective view showing a rotary damper device with a one-way clutch. FIG. 2 is a side sectional view showing a rotary damper device with a one-way clutch. (A) is a side sectional view showing a rotor shaft, and (b) is a front view showing a rotor shaft. It is a perspective view showing the gear member seen from the bottom surface side. It is a figure which shows operation | movement of a one-way clutch when a gear member rotates to one side with respect to a rotor shaft, (a) One claw part is located radially outside the circle C, and one claw part is shown. FIG. 7B is a diagram illustrating a state in which the internal teeth are in contact with each other, and FIG. 7B is a diagram illustrating a state in which one of the claws is pressed by the internal teeth and retracts radially inward. It is a figure showing operation of a one-way clutch when a gear member rotates to one side with respect to a rotor axis, and a figure showing a state where the other claw part located in the diameter direction outside of circle C contacted internal teeth. It is. It is a figure which shows the operation | movement of a one-way clutch when a gear member rotates to the other side with respect to a rotor shaft, and (a) is a figure which shows the state in which one claw part was located radially outer than the circle C. (B) is a diagram showing a state in which the internal teeth are engaged with one of the claws. FIG. 9 is a view showing the operation of the one-way clutch when the gear member rotates to the other side with respect to the rotor shaft, in which the rotor shaft and the gear member rotate integrally after one of the claws and the internal teeth are engaged. FIG. It is a perspective view showing a 2nd embodiment of a slide member. It is a bottom sectional view showing the one-way clutch provided with the slide member concerning a 2nd embodiment. It is a perspective view showing a 3rd embodiment of a slide member. It is a bottom sectional view showing the one-way clutch provided with the slide member concerning a 3rd embodiment.

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

[Rotary damper device with one-way clutch]
The rotary damper device 1 with a one-way clutch shown in FIGS. 1 to 4 (hereinafter simply referred to as “rotary damper device 1”) is an embodiment of the rotary damper device with a one-way clutch according to the present invention.
The rotary damper device 1 is provided at an opening / closing portion of an opening / closing door that is rotatably connected to a main body of an OA device such as a small printer, for example. Is used to generate The rotary damper device 1 is not limited to this, and can be provided in a rotating portion of a second member rotatably connected to the first member.

The rotary damper device 1 includes a housing 10, a rotor blade 25, a rotor shaft 20, a slide member 30, a gear member 50, and a viscous fluid 60.
In the rotary damper device 1, the one-way clutch 2 includes the rotor shaft 20, the slide member 30, and the gear member 50. That is, the rotary damper device 1 is configured by connecting the one-way clutch 2 to a rotary damper that applies a rotational resistance to the rotor shaft 20. The rotor shaft 20 is an example of a rotation shaft that is rotatable about an axis.

The housing 10 has a housing body 10A and a lid 10B.
The housing main body 10A is formed in a bottomed cylindrical shape, and has a bottom surface 11. At the center of the bottom surface 11, a columnar support shaft 12 that projects into the housing body 10A along the axis P direction is formed. An opening 13 is formed at an end of the housing body 10A opposite to the bottom surface 11 in the direction of the axis P.
The lid 10B closes the opening 13 of the housing body 10A. A circular through hole 14 penetrating in the direction of the axis P is formed at the center of the lid 10B.

  The rotor blade 25 is formed in a substantially disk shape, and is housed in the housing body 10A so as to be rotatable about the axis P. A bearing hole 23 is formed in a surface of the center portion of the rotor blade 25 opposite to the bottom surface 11. The bearing hole 23 is configured to be fitted to the support shaft 12 of the housing body 10A. The rotor 20 is rotatably supported by the housing 10 by the bearing hole 23 being rotatably fitted to the support shaft 12.

  The rotor shaft 20 extends from the center of the rotor blade 25 toward one side in the direction of the axis P, and is configured to be rotatable about the axis P. The rotor shaft 20 is configured to be rotatable integrally with the rotor blade 25. The rotor shaft 20 extends from the inside of the housing 10 to the outside of the housing 10 through the through hole 14 of the lid 10B.

  The rotor shaft 20 has a part inserted into the housing 10 and a part protruding outside the housing 10. A portion of the rotor shaft 20 protruding outside the housing 10 is an extension shaft 21. The extension shaft 21 is formed in a substantially cylindrical shape having two chamfered outer peripheral surfaces, and has a pair of chamfers 211. The pair of chamfers 211 are formed in a planar shape, and are arranged in parallel with each other.

  As shown in FIGS. 3 to 5, the extension shaft 21 is formed with an insertion hole 212 penetrating the extension shaft 21 in the radial direction. The insertion hole 212 is formed in a direction communicating between the pair of chamfered portions 211.

  The extension shaft 21 is formed in a circumferential direction by a slit 213 formed from a front end portion (an end portion opposite to the housing 10 side in the axis P direction) of the extension shaft 21 toward the housing 10 side in the axis P direction. And has a plurality of shaft piece portions 21A. That is, the tip of the extension shaft 21 is divided into the plurality of shaft pieces 21A by the slit 213.

  In the present embodiment, the slit 213 extends in the radial direction parallel to the direction in which the insertion hole 212 is formed, and divides the distal end of the extension shaft 21 into two shaft pieces 21A. However, the distal end of the extension shaft 21 can be divided into three or more shaft pieces 21A.

  A groove 214 that is recessed radially inward is formed on the outer peripheral surface of the shaft piece 21 </ b> A of the extension shaft 21. The groove 214 extends in the circumferential direction. In the present embodiment, the groove 214 is formed over the entire area of the shaft piece 21A in the circumferential direction.

  A fitting portion 22 is formed at an end of the extension shaft 21 of the rotor shaft 20 on the housing 10 side. The fitting portion 22 is formed to have a larger diameter than the extension shaft 21. The fitting portion 22 is exposed outside the housing 10.

The viscous fluid 60 is sealed in the housing 10. The viscous fluid 60 imparts rotational resistance to the rotor blade 25 that is housed in the housing body 10A and rotates about the axis P, and the rotor shaft 20 that rotates integrally with the rotor blade 25.
The viscous fluid 60 is composed of a viscous fluid such as silicone oil. The magnitude of the rotation resistance applied to the rotor blade 25 can be adjusted by appropriately changing the viscosity of the viscous fluid 60 and the shape of the rotor blade 25.
A seal member 15 such as an O-ring is interposed between the rotor shaft 20 and the lid 10B to prevent the viscous fluid 60 from leaking from between the rotor shaft 20 and the lid 10B. .

As shown in FIGS. 1 to 4 and 6, the gear member 50 is configured to be rotatable around the axis P to one side and the other side opposite to the one side. It has an external gear 52 and internal teeth 53.
The gear main body 51 is formed of a cylindrical member that is rotatably supported on the rotor shaft 20 about the axis P. The external gear 52 protrudes radially outward from the outer peripheral surface of the gear main body 51 and has a plurality of external teeth 52a arranged along the circumferential direction. The internal teeth 53 protrude radially inward from the inner peripheral surface of the gear body 51, and are provided in plural numbers along the circumferential direction.

  The gear main body 51 has a housing part 51 a in which the internal teeth 53 are formed and houses the slide member 30, and a support part 51 b formed smaller in diameter than the housing part 51 a and supported by the rotor shaft 20. The housing portion 51a is disposed closer to the housing 10 than the support portion 51b in the axial center P direction. The inner diameter of the support portion 51b of the gear body 51 and the outer diameter of the extension shaft 21 are formed to have substantially the same dimensions, and the extension shaft 21 can be inserted into the support portion 51b.

A projection 55 projecting radially inward is formed on the inner peripheral surface of the support portion 51b. The protrusion 55 extends in the circumferential direction. In the present embodiment, the protrusion 55 is formed over the entire circumferential surface of the inner peripheral surface of the support portion 51b.
The protrusion 55 is configured to be fittable with the groove 214 of the rotor shaft 20, and the gear member 50 is formed by inserting the extension shaft 21 into the support 51 b and fitting the protrusion 55 with the groove 214. It is supported by the rotor shaft 20.

  In the present embodiment, the groove 214 is formed on the rotor shaft 20 and the protrusion 55 is formed on the support portion 51b of the gear body 51. However, the protrusion protruding radially outward is formed on the rotor shaft 20. In addition, the gear member 50 may be supported by the rotor shaft 20 by forming a groove recessed radially outward in the support portion 51b of the gear body 51 and fitting the protrusion and the groove. it can.

The inner diameter of the housing portion 51a of the gear body 51 and the outer diameter of the fitting portion 22 of the rotor shaft 20 are formed to have substantially the same dimensions. The portion 22 is configured to be fittable. The housing 10 side end of the housing portion 51a is configured as a fitted portion 511 into which the fitting portion 22 of the rotor shaft 20 is fitted.
In the one-way clutch 2, when the protrusion 55 of the support portion 51 b of the gear member 50 and the groove 214 of the rotor shaft 20 are fitted, the end of the housing portion 51 a of the gear member 50 on the housing 10 side and the rotor shaft 20 are fitted. The mating portion 22 is fitted.

  As described above, the rotor shaft 20 has the fitting portion 22 fitted to the fitted portion 511 of the housing portion 51a at a position away from the groove portion 214 and the projection portion 55 toward the housing 10 in the axial center P direction. ing. The gear member 50 is supported by the rotor shaft 20 at a portion where the fitted portion 511 to be fitted to the fitting portion 22 is formed, in addition to the portion where the protrusion 55 to be fitted to the groove portion 214 is formed. Have been.

That is, the gear member 50 is supported by the rotor shaft 20 at a plurality of portions such as a portion of the protrusion 55 and a portion of the fitted portion 511 which are separated from each other in the direction of the axis P.
Accordingly, it is possible to suppress the swing of the gear member 50 supported by the rotor shaft 20 with respect to the axis P while supporting the gear member 50 by the rotor shaft 20 with a simple structure.

  The internal teeth 53 are disposed on the downstream side in the direction of rotation to one side of the gear member 50, and are disposed upstream of the first surface 53a in the direction of rotation on one side of the gear member 50. And a second surface 53b. The first surface 53a is formed as an inclined surface that is inclined toward the downstream side in the rotation direction toward one side of the gear member 50 as going outward in the radial direction. The second surface 53b is formed as an inclined surface that is inclined toward the upstream side in the rotation direction toward the other side of the gear member 50 as going radially outward.

  The internal teeth 53 are arranged at equal intervals along the circumferential direction of the gear member 50. The internal teeth 53 are formed such that the center of a circle C passing through the tip of each internal tooth 53 (the boundary between the first surface 53a and the second surface 53b) is the axis P (see FIG. 6).

As shown in FIGS. 3 and 4, the slide member 30 is formed of a rod-shaped member, and is slidably inserted in the insertion hole 212 of the extension shaft 21 in a radial direction orthogonal to the axis P direction. . The slide member 30 is supported by the rotor shaft 20 by being inserted into the insertion hole 212, and is configured to be able to rotate integrally with the rotor shaft 20 about the axis P. The slide member 30 has a pair of side surfaces 30a extending along the slide direction.
The slide member 30 has claw portions 31 protruding radially outward at both ends in the slide direction.

As shown in FIG. 7A, the claw portion 31 has a retracting surface 31 a disposed on the upstream side in the direction of rotation to one side of the gear member 50, and a retracting surface in the direction of rotation to one side of the gear member 50. And an engagement surface 31b disposed downstream of the base 31a. The evacuation surface 31a is formed as an inclined surface that inclines to the downstream side in the rotation direction toward one side of the gear member 50 as going radially outward. The engagement surface 31b is formed as an inclined surface that is inclined toward the upstream side in the rotation direction toward the other side of the gear member 50 as going outward in the radial direction.
The claw portion 31 protrudes more toward the engagement surface 31b than the side surface 30a in a direction perpendicular to the sliding direction of the slide member 30 and perpendicular to the side surface 30a. That is, the claw portion 31 protrudes downstream from the side surface 30a in the rotation direction toward one side of the gear member 50.

  As shown in FIG. 7A, the dimension L between the tip of one claw 31 and the tip of the other claw 31 of the slide member 30 is formed to be larger than the diameter R of the circle C. Therefore, regardless of the slide position of the slide member 30 with respect to the rotor shaft 20, at least one of the claw portions 31 is located radially outside the circle C.

The retreating surface 31a of the claw portion 31 abuts against the internal teeth 53 of the gear member 50 by rotating the gear member 50 to one side with respect to the rotor shaft 20, and the engaging surface 31b of the claw portion 31 Is rotated to the other side with respect to the rotor shaft 20 to abut against the internal teeth 53 of the gear member 50.
The first surface 53a of the internal teeth 53 of the gear member 50 comes into contact with the claw portion 31 of the slide member 30 by rotating the gear member 50 to one side with respect to the rotor shaft 20, so that the gear member 50 rotates the rotor shaft. By rotating to the other side with respect to 20, it comes into contact with the claw 31 of the slide member 30.

[Operation of one-way clutch in rotary damper device with one-way clutch]
The one-way clutch 2 in the rotary damper device 1 configured as described above operates as follows.
In the following description of the operation of the one-way clutch 2, one of the claws 31 formed at both ends of the slide member 30 is referred to as a claw 311, and the other claw 31 is referred to as a claw. 312. Also, the internal teeth 531, the internal teeth 532, and the internal teeth 53 of the gear member 50 are brought into contact with the claw portion 31 when the gear member 50 is rotated from the state shown in FIG. 533 and internal teeth 534 as appropriate.

First, the operation of the one-way clutch 2 when the gear member 50 rotates to one side with respect to the rotor shaft 20 will be described.
FIG. 7A shows a state in which the claw portion 311 is positioned radially outward from the circle C, and the claw portion 312 does not protrude radially outward from the circle C. In the state shown in FIG. 7A, the internal teeth 531 are located upstream of the claw 311 in the rotation direction toward one side of the gear member 50.

  When the gear member 50 rotates to one side with respect to the rotor shaft 20 in this state, the internal teeth 531 of the gear member 50 abut on the claw portions 311. When the gear member 50 rotates to one side after the internal teeth 531 abut the claw portions 311, the claw portions 311 are pressed by the internal teeth 531, and the claw portions 311 retreat radially inward from the internal teeth 531, and slide. The member 30 slides toward the claw 312 side.

In this case, the first surface 531a of the internal teeth 531 abuts on the retreating surface 311a of the claw portion 311. The retreating surface 311a inclines toward the downstream side in the rotation direction toward one side of the gear member 50 as going radially outward. The claw portion 311 can be smoothly retracted from the internal teeth 531 with the rotation of the gear member 50 to one side.
In addition, the first surface 531a of the internal teeth 531 is formed as an inclined surface that is inclined to the downstream side in the rotation direction toward one side of the gear member 50 as going outward in the radial direction, so that the gear member 50 is moved to one side. When rotating, the retraction of the claw portion 311 from the internal teeth 531 can be further smoothed.

As shown in FIG. 7B, in the slide member 30, the claw portion 311 is pressed by the internal teeth 531 of the gear member 50 that rotates to one side, so that the claw portion 311 does not protrude outside the circle C. It slides to the claw part 312 side until it becomes a state.
After the slide member 30 slides until the claw portion 311 does not protrude from the circle C to the outside, the internal teeth 531 do not engage with the claw portion 311 and move toward the one side of the gear member 50 more than the claw portion 311. Move to the downstream side in the rotation direction.
When the slide member 30 is at the slide position where the claw portion 311 does not protrude outside the circle C, the claw portion 312 protrudes outside the circle C.

As shown in FIG. 8, when the gear member 50 further rotates to one side, the internal teeth 532 of the gear member 50 abut on the claw 312 located on the opposite side to the claw 311. When the gear member 50 rotates to one side after the internal teeth 532 contact the claw 312, the claw 312 is pressed by the internal teeth 532, and the claw 312 is retracted radially inward from the internal teeth 532, and slides. The member 30 slides toward the claw 311 side.
The slide member 30 slides until the claw portion 312 does not protrude from the circle C to the outside, and then the internal teeth 532 do not mesh with the claw portion 312, and the inner teeth 532 move to the side of the gear member 50 more than the claw portion 312. Move to the downstream side in the rotation direction.

  Thereafter, when the gear member 50 further rotates to one side, the internal teeth 533 of the gear member 50 abut the claw portion 311, and the slide member 30 moves the claw until the claw portion 311 does not protrude outward from the circle C. Slide to the part 312 side. When the gear member 50 further rotates to one side, the internal teeth 534 of the gear member 50 abut against the claw portion 312, and the slide member 30 moves the claw portion 311 until the claw portion 312 does not protrude outside the circle C. Slide to the side.

As described above, when the gear member 50 rotates to one side, the internal teeth 53 of the gear member 50 alternately come into contact with the claw portions 311 and 312 of the slide member 30, and the internal teeth 53 become the claw portions 311 and 312. When the contact is made, the claw portions 311 and 312 are retracted from the internal teeth 53, and the slide member 30 is configured to slide alternately to the claw portion 312 side and the claw portion 3111 side in the sliding direction. As a result, the internal teeth 53 of the gear member 50 do not engage with the claws 311 and 312 of the slide member 30, and the gear member 50 rotates independently of the rotor shaft 20.
Since the gear member 50 rotates independently of the rotor shaft 20 and the rotor shaft 62 does not rotate, the gear member 50 rotates without imparting rotational resistance.

Next, the operation of the one-way clutch 2 when the gear member 50 rotates to the other side with respect to the rotor shaft 20 will be described.
FIG. 9A shows a state in which the claw portion 311 is positioned radially outward from the circle C, and the claw portion 312 does not protrude radially outward from the circle C. In the state illustrated in FIG. 9A, the internal teeth 531 are located upstream of the claw 311 in the rotation direction toward the other side of the gear member 50.

When the gear member 50 rotates to the other side with respect to the rotor shaft 20 from this state, as shown in FIG. 9B, the internal teeth 531 of the gear member 50 come into contact with the claw portions 311 and the internal teeth 531 and the claw are formed. The part 311 is engaged.
As shown in FIG. 10, when the gear member 50 rotates to the other side after the internal teeth 531 and the claw 311 are engaged, the slide member 30 does not slide in the sliding direction, and the internal teeth 531 and the claw 311 Is maintained, and the rotor shaft 20 rotates integrally with the gear member 50. When the rotor shaft 20 rotates integrally with the gear member 50, the rotation resistance of the viscous fluid 60 applied to the rotor shaft 62 when the rotor shaft 62 rotates is also transmitted to the gear member 50.

In this case, the second surface 531b of the internal teeth 531 abuts on the engagement surface 311b of the claw portion 311. The engagement surface 311b is located on the upstream side in the rotational direction toward the other side of the gear member 50 as going radially outward. When the gear member 50 rotates to the other side with respect to the rotor shaft 20, the engagement state between the internal teeth 531 and the claw portions 311 can be easily maintained.
Further, since the second surface 531b of the internal teeth 531 is formed as an inclined surface which is inclined upstream in the rotation direction to the other side of the gear member 50 toward the outside in the radial direction, the gear member 50 is attached to the rotor shaft 20. When rotated to the other side, the internal teeth 531 and the claw portions 311 can be reliably engaged.

  In the one-way clutch of the rotary damper device 1, the dimension L between the tip of the claw 311 and the tip of the claw 312 of the slide member 30 is formed to be larger than the diameter R of the circle C. Since one of the claws 311 and 312 is located outside the circle C, when the gear member 50 rotates to the other side with respect to the rotor shaft 20, regardless of the slide position of the slide member 30, the claw is formed. The engagement surface 311b of the portion 311 or the engagement surface 312b of the claw portion 312 and the second surface 53b of the internal teeth 53 are securely engaged, and the gear member 50 and the rotor shaft 20 rotate integrally. Has become possible.

  In the one-way clutch 2, the state in which the gear member 50 and the rotor shaft 20 are engaged by the claw portion 31 of the slide member 30 slidably provided on the rotor shaft 20, and the state in which the gear member 50 and the rotor shaft 20 are Since it is configured to switch between a non-engaged state, it is possible to reduce the size of the one-way clutch, for example, compared to a case where the one-way clutch is configured to accommodate a plurality of planetary gears inside the outer member. Has become.

  Thus, when the one-way clutch 2 is downsized, the number of external teeth 52a in the external gear 52 of the gear member 50 can be reduced. Therefore, when the gear transmitting the rotational force to the rotor shaft 20 is meshed with the external gear 52, the rotational speed of the rotor shaft 20 is increased to increase the rotational resistance to the rotor shaft 20 generated in the rotary damper device 1. Thus, the usability of the rotary damper device 1 connected to the one-way clutch 2 can be improved.

Further, in the one-way clutch 2, since the gear member 50 and the slide member 30 are supported by the rotor shaft 20, another member for supporting the gear member 50 and the slide member 30 is not required, and the one-way clutch 2 is configured. It is possible to reduce the number of components to be used.
In particular, the gear member 50 fits the groove portion 214 of the rotor shaft 20 with the projection 55 of the gear member 50 and also fits the fitting portion 22 of the rotor shaft 20 with the fitted portion 511 of the gear member 50. By doing so, since the gear member 50 is supported by the rotor shaft 20, no separate member is required to support the gear member 50, and the number of components can be reduced. In addition, by supporting the gear member 50 at a plurality of locations separated in the direction of the axis P of the rotor shaft 20, the gear member 50 is supported by the rotor shaft 20 with a simple structure while the gear member 50 is supported by the rotor shaft 20. The deflection of the member 50 can be suppressed.
The same applies to the case where a protrusion is formed on the rotor shaft 20 and a groove that fits with the protrusion is formed on the gear member 50.

  Further, the rotor shaft 20 is divided into a plurality of shaft piece portions 21A by slits 213, and the groove portion 214 is formed on the outer peripheral surface of the shaft piece portion 21A. When fitted into the groove 214, the shaft piece 21A of the rotor shaft 20 is bent, so that the fitting operation can be facilitated.

  Furthermore, since the slide member 30 is slidably supported by the rotor shaft 20 by being inserted into the insertion hole 212 of the rotor shaft 20, the slide member 30 can be supported with a simple configuration. I have.

[Second Embodiment of Slide Member]
The slide member 30 is configured such that the claw portion 31 projects more toward the engagement surface 31b than the side surface 30a in a direction orthogonal to the slide direction of the slide member 30 and orthogonal to the side surface 30a. May be configured so that the claw portion does not protrude from the side surface of the slide member.

For example, the slide member 130 shown in FIGS. 11 and 12 is slidably inserted into the insertion hole 212 of the extension shaft 21 in a radial direction orthogonal to the axis P direction. The slide member 130 is supported by the rotor shaft 20 by being inserted into the insertion hole 212, and is configured to be able to rotate integrally with the rotor shaft 20 about the axis P. The slide member 130 has a pair of side surfaces 130a extending along the slide direction.
The slide member 130 has claw portions 131 protruding radially outward at both ends in the slide direction.

  The claw portion 131 is provided on the upstream side in the direction of rotation to one side of the gear member 50, and is provided on the downstream side of the retreat surface 131 a in the direction of rotation on one side of the gear member 50. And a mating surface 131b. The evacuation surface 131a is formed as an inclined surface that inclines to the downstream side in the rotation direction toward one side of the gear member 50 as going outward in the radial direction. The engagement surface 131b is formed as an inclined surface that is inclined toward the upstream side in the rotation direction toward the other side of the gear member 50 as going radially outward.

The claw portion 131 is within a range of a pair of side surfaces 130a in a direction orthogonal to the sliding direction of the slide member 130 and orthogonal to the side surface 130a, and moves from the side surface 130a to the engagement surface 131b side and the retreat surface 131a side. Does not protrude.
As described above, in the slide member 130, since the claw 131 is within the range of the pair of side surfaces 130 a, the claw 131 is inserted when the slide member 130 is inserted into the insertion hole 212 of the extension shaft 21. It is possible to easily insert the slide member 130 into the insertion hole 212 without interfering with the hole 212.

[Third Embodiment of Slide Member]
As shown in FIGS. 13 and 14, the slide member 30 may be configured as a slide member 230 having a substantially cylindrical shape. In this case, the insertion hole 212 of the extension shaft 21 through which the slide member 230 is inserted can be formed in a cylindrical shape that matches the shape of the slide member 230.

Both ends of the slide member 230 are disposed on the upstream side in the direction of rotation to one side of the gear member 50, and are disposed downstream of the retracting surface 231 a in the direction of rotation on one side of the gear member 50. And a claw portion 231 having an engaging surface 231b. The evacuation surface 231a is formed as an inclined surface that inclines to the downstream side in the rotation direction toward one side of the gear member 50 as going outward in the radial direction. The engagement surface 231b is formed on a surface orthogonal to the direction of rotation of the gear member 50 to the other side.
The retreating surface 231a contacts the first surface 53a of the internal teeth 53 of the gear member 50 when the gear member 50 rotates to one side with respect to the rotor shaft 20, and the engaging surface 231b indicates that the gear member 50 When rotating to the other side with respect to the shaft 20, it contacts the second surface 53b of the internal teeth 53 of the gear member 50.

As described above, the retreating surface 231a is formed on the inclined surface that is inclined to the downstream side in the direction of rotation to one side of the gear member 50 as going outward in the radial direction, so that when the gear member 50 rotates to one side. The claw portions 231 at both ends of the slide member 230 are simultaneously prevented from interfering with the internal teeth 53 of the gear member 50, and the retreating surface 231 a of the claw portion 231 can smoothly retreat from the internal teeth 53.
Further, by forming the engagement surface 231b on a surface orthogonal to the rotation direction to the other side of the gear member 50, when the gear member 50 rotates to the other side, the engagement between the internal teeth 13 and the engagement surface 231b. It becomes easy to maintain the engaged state.

  In addition, it is preferable that the extension shaft 21 and / or the slide member 230 be configured to be able to suppress the rotation of the slide member 230 inserted through the insertion hole 212 around the cylindrical axis. With this configuration, it is possible to secure contact between the retreating surface 231a of the slide member 230 and the first surface 53a of the internal teeth 53 of the gear member 50.

DESCRIPTION OF SYMBOLS 1 Rotary damper apparatus with one-way clutch 2 One-way clutch 10 Housing 10A Housing main body 20 Rotor shaft 21 Extension shaft 21A Shaft piece part 22 Fitting part 25 Rotor blade 30, 130, 230 Sliding member 30a Side surface 31, 131, 231 Claw part 31a , 131a, 231a Evacuation surface 31b, 131b, 231b Engagement surface 50 Gear member 51 Gear body 52 External gear 52a External tooth 53 Internal tooth 53a First surface 53b Second surface 55 Projection 60 Viscous fluid 211 Chamfered portion 212 Insertion hole 213 Slit 214 Groove 511 Fitted part C Circle (passing the tip of each internal tooth) L Dimension (between tip of one claw and tip of the other claw) P axis R (circle) diameter

Claims (6)

A rotating shaft rotatable about an axis;
The rotating shaft is supported so as to be slidable in a radial direction orthogonal to the axial direction, and is rotatable integrally with the rotating shaft about the axial center, and radially outward at both ends in the sliding direction. A slide member having a protruding claw portion,
A cylindrical member that is rotatably supported on the rotation shaft about the axis and accommodates the slide member, and a plurality of external teeth that project radially outward from an outer peripheral surface of the cylindrical member; A gear member having a plurality of internal teeth projecting radially inward from the inner peripheral surface of the cylindrical member,
With
A groove is formed on one of an outer peripheral surface of the rotating shaft and an inner peripheral surface of the cylindrical member in the gear member,
An outer peripheral surface of the rotating shaft, and a protrusion that can be fitted with the groove portion are formed on the other of the inner peripheral surface of the cylindrical member in the gear member,
The rotating shaft has a fitting portion fitted to an inner peripheral surface of the cylindrical member at a position away from the groove or the protrusion formed in the rotating shaft in the axial direction.
The gear member is supported by the rotating shaft by fitting the groove and the protrusion, and by fitting the fitting portion to the inner peripheral surface of the cylindrical member,
The dimension between the tip of one claw and the tip of the other claw is formed to be larger than the diameter of a circle passing through the tips of the plurality of internal teeth and centered on the axis,
The claw portion is configured such that the gear member rotates to one side with respect to the rotation shaft, and a retreat surface that contacts the internal teeth, and the gear member rotates to the other side with respect to the rotation shaft. Having an engagement surface that abuts against the internal teeth,
When the internal member and the retreat surface come into contact with each other when the gear member rotates to one side, the slide member slides in the sliding direction, the claw portion retreats from the internal tooth, and the gear member is It rotates independently of the rotation shaft, and when the gear teeth rotate to the other side, when the internal teeth and the engagement surface come into contact with each other, the internal teeth and the engagement surface engage to engage with each other. A gear member and the rotation shaft rotate integrally,
A one-way clutch. The rotary shaft penetrates in a radial direction, and has an insertion hole through which the slide member is slidably inserted.
The one-way clutch according to claim 1, wherein: The rotating shaft has a plurality of shaft pieces divided in a circumferential direction by a slit formed along the axial direction from a tip end of the rotating shaft,
The groove portion is formed on an outer peripheral surface of the shaft piece portion,
The one-way clutch according to claim 1 or 2, wherein: The evacuation surface is formed on an inclined surface that inclines to the downstream side in the rotation direction toward one side of the gear member as going radially outward,
The engagement surface is formed as a surface orthogonal to the rotation direction to the other side of the gear member, or an inclined surface that is inclined toward the upstream side in the rotation direction to the other side of the gear member as going radially outward. ,
The one-way clutch according to any one of claims 1 to 3, wherein: The internal teeth are formed by rotating the gear member to one side with respect to the rotation shaft and the first surface that comes into contact with the claw portion, and by rotating the gear member to the other side with respect to the rotation shaft. A second surface that contacts the claw portion;
The first surface is formed as an inclined surface that inclines toward the downstream side in the rotation direction toward one side of the gear member as going radially outward,
The second surface is formed as an inclined surface that inclines to the upstream side in the rotation direction to the other side of the gear member as going radially outward,
The one-way clutch according to any one of claims 1 to 4, wherein: The one-way clutch according to any one of claims 1 to 5,
A housing into which the rotating shaft of the one-way clutch is inserted;
A rotor blade housed in the housing and rotatable integrally with the rotation shaft about the axis;
A viscous fluid sealed in the housing to impart rotational resistance to the rotor blades;
Comprising,
A rotary damper device with a one-way clutch.

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