KR20140147255A - apparatus for rotating damper - Google Patents

Abstract

In order to improve user convenience and durability by providing a stable attenuation performance in case of a one-way rotation and thereby enabling a rotation of another direction to provide a damping force which is restored quickly, the present invention provides a rotary damper gear which includes: a rotary shaft which is connected to a rotary damping object; a rotor unit which has a blade which protrudes from the outer circumference of a cylindrical body fixated on one side of the rotary shaft; a wing unit which is combined to cover the outside of the blade and selectively moves up and down along a rotary direction to a radial direction by having an upward inclined surface in the lower part of the first surface of a damping rotary direction side, and a downward inclined surface in the upper part of the second surface of a damping release rotary direction side; and a housing which is filled with damping fluid inside and is installed to provide a rotary damping force by the flow of the damping fluid through a gap between an end part of the wing unit and the inner circumference of a hollow unit formed to accommodate the rotor unit and the wing unit.

Description

Apparatus for rotating damper

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil damper device, and more particularly, to a rotary damper device that provides stable damping performance in one-directional rotation and provides damping force for quickly restoring rotation in the other direction to improve ease of use and durability .

Generally, the door of the hinged type is composed of a door and a door frame to which the door is fixed. At this time, the door is opened and closed by an artificial force, and includes a hinge connection part for smoothly opening and closing the door.

On the other hand, when a door of a refrigerator or a door of a high-rise apartment or an office is suddenly opened or closed, the door and the door frame are severely impacted. Especially, since the atmospheric circulation of the high-rise building is blocked, the open door is strongly closed due to the air pressure difference, and the window that is opened by the external wind pressure is quickly closed.

In this way, the closing of the sudden and strong door not only generates quiet noise, but also the door and the door frame are broken. If the user's hand is caught in the door frame, serious injury may occur. Conventionally, a door damper device has been devised to provide a restoring force when the door is opened and closed to buffer shocks to prevent various safety accidents and product damage.

1 is an exemplary view showing a conventional door damper device.

As shown in FIG. 1, a conventional door damper device 100 includes a link structure 120 and a hydraulic cylinder 110, and is configured to gradually open and close the door with hydraulic pressure. Here, the hydraulic cylinder 110 functions to damp the pressure applied from both sides of the piston to hydraulic pressure, and the link structure 120 is formed so that the door can be maintained in an open state and a closed state through an internal spring structure do.

However, in the conventional door damper device 100, the link structure 120 and the hydraulic cylinder 110 are provided on the upper part of the door, but the hydraulic damper device 100, There is a problem that the size of the product increases because a restoring member for maintaining the volume of the inside of the hydraulic cylinder 110 is provided in the process of obtaining the structure and damping force and restoring the original shape.

In addition to the structure for interconnecting the door and the door frame, a damper device is also known which controls the rotational speed of the damping object through the hydraulic pressure of the damping fluid which is coupled to the rotational axis of the hinge connection part and filled inside.

The damper device controls the flow of the damping fluid to form a damping force by a blade formed so as to oppose an external force through flow friction in one direction or both directions using a damping fluid in a housing formed of a constant closed space.

However, the structure of the fluid passage controlled by the blade is complicated, and frequent failures and adhesion of the damping fluid in the fluid passage deteriorate the reliability and durability of the product.

Further, when the damping fluid is returned to its original state due to a constant internal return time of the damping fluid during the damping rotation and the damping rotation of the blade, there is a problem that usability is reduced.

Korean Registration Practice No. 20-0354593

In order to solve the above problems, the present invention provides a rotary damper device with improved durability and ease of use by providing a damping force which is stable during one-directional rotation, .

According to an aspect of the present invention, there is provided a rotary damping apparatus comprising: a rotary shaft connected to a rotary damping object; A rotor portion having a blade projecting on an outer periphery of a cylindrical body fixed to one side of the rotary shaft; And an upper inclined surface is formed at a lower portion of the first surface at the damping rotation direction side and a lower inclined surface is formed at an upper portion of the second surface at the damping release rotation direction side, A wing portion which is moved upward and downward; And a housing that is filled with damping fluid therein to provide rotational damping force through the flow of damping fluid through the gap between the inner periphery of the hollow portion and the end portion of the wing portion such that the rotor portion and the wing portion are adapted to be inserted thereinto A rotary damper device is provided.

Here, it is preferable that the front surface of the blade on the damping rotation direction side is formed as an upwardly inclined guide surface.

The upward inclined surface is inclined upward toward the damping rotation direction at the center of the wing portion in the lower edge portion of the first surface, and the downward inclined surface is damped at the upper edge portion of the second surface at the center of the wing portion And is inclined downward toward the release rotation direction.

Preferably, a guide protrusion is formed on one of the rear surface of the blade in the damping release direction and the inner surface of the wing portion facing the rear surface, and the guide groove is formed in the other surface of the guide protrusion.

In addition, a seesaw groove having a seesaw protrusion is formed in the inner periphery of the housing. The seesaw groove is segregated around the seesaw by the pressure of the damping fluid to selectively contact the outer periphery of the rotor portion, It is preferable that a stopper for shielding the movement of the damping fluid is provided.

Through the above-mentioned solution, the rotary damper device of the present invention provides the following effects.

First, since the gap between the end portion of the wing portion and the housing is adjusted by the pressure of the damping fluid applied to the upward inclined face and the downward inclined face, corresponding to the rotational direction of the rotary shaft, the damping force is selectively provided, Convenience can be improved.

Second, the upward sloping surface is formed in a shape sloped downward at the lower edge of the first surface, and the downward sloping surface is formed in a shape that is sloped downward at an upper edge portion of the second surface, As the wing portion is made compact by minimizing the interval, the angle of rotation of the wing portion, which is limited by the stopper, can be maximized, so that compatibility of the product with respect to the angle of rotation can be improved.

Third, since the wing portion is disposed in a spaced space between the blade and the housing and is coupled to cover the outer side of the blade, the wing portion is moved up and down. Therefore, even if strong pressure is applied by the damping fluid, In addition, the guide surface improves the adhesion between the wing portion and the inner periphery of the housing to improve the damping force, and the guide groove portion guides the up and down movement of the wing portion, thereby preventing the axial flow of the wing portion, It is possible to improve the reliability of the damping force forming and releasing operations as the wing moves up and down.

Fourth, since the wing portion is moved upward along the inclined guide surface to form a damping force, the wing portion is brought into close contact with the inner periphery of the housing to concentrate the external force applied by the rotation in the damping rotation direction on the guide surface and the wing portion, The damping drive can be smoothly performed without damaging the blade even if an excessive force is applied to the blade, thereby improving the durability of the product .

Fifth, the stopper may cancel the rotational force by the seesaw motion and shield the damping fluid before the damping force is formed according to the upward movement of the wing portion when the rotor portion is rotated in the damping rotation direction, The durability of the product can be improved by dispersing and supporting the pressure applied to the wing portion at the time of deceleration.

1 is an exemplary view showing a conventional door damper device.
2 is a perspective view illustrating a coupling structure of a rotary damper device according to an embodiment of the present invention;
3 is an exploded perspective view of a rotary damper device according to an embodiment of the present invention;
4A and 4B are longitudinal cross-sectional views illustrating driving damping rotation directions of a rotary damper device according to an embodiment of the present invention;
5A and 5B are longitudinal sectional views showing a driving state of a rotary damper device according to an embodiment of the present invention in a damping release rotational direction.
6 is a side cross-sectional view of a rotary damper device of a rotary damper device according to an embodiment of the present invention.

Hereinafter, a rotary oil damper device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view illustrating a coupling structure of a rotary damper device according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a rotary damper device according to an embodiment of the present invention, FIGS. 5A and 5B are longitudinal sectional views showing a driving state of a rotary damper device according to an embodiment of the present invention in a damping-release rotational direction, and FIGS. 5A and 5B are longitudinal sectional views 6 is a side sectional view of a rotary damper device of a rotary damper device according to an embodiment of the present invention.

2 to 6, a rotary damper device 200 according to an embodiment of the present invention includes a rotary shaft 10, a rotor portion 20, a wing portion 30, and a housing 40 .

Here, the rotary damper device 200 is connected to a rotary shaft 10, which serves as a center of rotary motion, to prevent a shock caused by a rapid rotation when the rotary damping object such as a lid of an electric rice cooker is opened and closed vertically, .

Therefore, it is possible to prevent the product from being damaged due to various safety accidents or shocks, such as finger fingers, which may occur when the rotary damping object is strongly closed. Of course, it is preferable that the rotary shaft includes not only a rotary shaft that rotates up and down like a lid of an electromagnetic cooker but also a rotary shaft that rotates right and left like a door such as a furniture or a refrigerator.

In this embodiment, both ends of the rotary shaft 10 are connected to rotate integrally with the lid of the electromagnetic cooker, and the rotary damper device 200 is connected to the main body of the electromagnetic cooker so that rotation is restrained do.

2, the rotary shaft 10 is coupled to the fixed holder 205, and the fixed holder 205 is coupled to the lid through a screw coupling part 206. [ At this time, it is preferable that a polygonal cross-section 11 is formed at both ends of the rotary shaft 10. The polygonal cross-section 11 is inserted into the polygonal hole 205a of the fixed holder 205 and is engaged. Here, the polygonal hole 205a is formed to have a shape that matches the outer surface profile of the polygonal cross-section 11, and the lid is constrained to rotate integrally with the rotary shaft 10. [

In addition, a torsion spring 210 is provided on the outer circumference of the rotary shaft 10 to provide an elastic restoring rotational force for opening the lid. The torsion spring 210 is provided with a body An engagement extension portion 212 and a lid engagement extension portion 211 are provided.

Referring to FIG. 3, the rotor 20 is formed as a cylindrical body fixed to one side of the rotary shaft 10, and a blade 21 protrudes on the outer circumference. In this case, a knurling portion 12 having surface irregularities is formed at the center of the rotary shaft 10, and the inner circumference of the rotor portion 20 is fitted to the knurling portion 12 and fixed so as to be integrally rotated Do. At this time, the inner circumference of the rotor portion 20 may be provided with concavities and convexities that are shaped to coincide with the concave-convex form of the nulling portion 12 in order to improve the rotational binding force with the nulling portion 12.

It is preferable that at least one blade 21 is stuck to the outer circumference 23 of the cylindrical body at a predetermined angular interval along the circumferential direction of the rotor 20. At this time, both sides of the blade 21 may be inclined at different angles.

A rotation guide plate 24 connected to one end of the blade 21 and protruding along the circumferential direction is formed on the outer periphery 23 of the rotor 20. Here, the rotation guide plate 24 contacts the inner circumference of the housing 40 to guide the rotation so that the rotor unit 20 does not move right and left but operates correctly. In addition, the damping fluid filled between the housing 40 and the rotor 20 is sealed to prevent leakage to the outside.

4A to 5A, the wing portion 30 is coupled to cover the outer surface of the blade 21, and an upward inclined surface 32 is formed at a lower portion of the first surface 30a on the damping rotation direction side And a downward inclined surface 31 is formed on the second surface 30b on the side of the damping release rotation direction so as to be selectively moved up and down in the radial direction along the rotation direction.

 Here, the damping rotation direction refers to a direction in which the rotation speed is attenuated when the rotor unit 20 rotates due to the damping fluid, the damping rotation direction refers to a direction opposite to the damping rotation direction, and the damping rotation direction side It is preferable that the first surface 30a of the wing portion 30 is in contact with the damping fluid when the wing portion 30 moves in the damping rotation direction. The second surface 30b on the side of the damping release rotation direction is preferably a surface on which the damping fluid contacts when the wing portion 30 moves in the damping rotation direction.

Specifically, the upper surface of the first surface 30a is formed with the upward sloping surface 32 inclined upward toward the damping rotation direction from the center of the wing portion 30, and the upper surface of the second surface 30b The downward inclined surface 31 inclined downward from the center of the wing portion 30 toward the damping release rotation direction is formed at the rim portion.

Referring to FIG. 4A, when the rotor portion 20 rotates in the damping rotation direction, the first surface 30a is subjected to the damping rotation direction pressure by the damping fluid. At this time, the upward inclined surface 32 disperses the pressure in the damping release rotational direction to the inner circumferential side of the housing 40 and the pressure in the direction of the blade 21 so that the wing portion 30 coupled to the blade 21 And is moved upward to come in close contact with the inner circumferential side of the housing (40).

On the other hand, referring to FIG. 5A, when the rotor portion 20 rotates in the damping release rotation direction, the second surface 30b is subjected to the damping rotation direction pressure by the damping fluid. At this time, the downward slope 31 disperses the pressure in the damping rotation direction on the side of the outer periphery 23 of the rotor portion 20 and the pressure in the direction of the blade 21, 30 are moved downward so as to be in close contact with the outer circumference 23 side of the rotor portion 20.

The flow resistance of the damping fluid flowing between the end of the wing portion 30 and the inner periphery of the housing 40 is changed according to the rotation direction of the rotation shaft 10, ≪ / RTI >

Since the wing portion 30 is disposed in a spaced space between the blade 21 and the housing 40 and is coupled to cover the outer side of the blade 21 and is moved up and down, Even if pressure is applied, the damping force can be stably provided without being detached from the blade 21, thereby improving the reliability of the product.

The upward sloping surface 32 is formed in an upward sloped shape at the lower edge of the first surface 30a and the downward sloping surface 31 is inclined downward at the upper edge of the second surface 30b The gap between the first surface 30a and the second surface 30b is minimized so that the rotation of the wing portion 30 limited by the stopper 50 as the wing portion 30 becomes compact, The angle can be maximized so that the compatibility of the product with respect to the rotation angle can be improved. At this time, the rotation free angle is set such that the second surface 30b of the rotor portion 20 rotates at an angle with which the first surface 30a contacts the one side of the stopper 50, To the angle of contact.

Each of the rim portions formed with the upward sloping surface 32 and the downward sloping surface 31 is formed in a cut shape with an inner portion except for the both end portions and is formed at both ends of the upward sloping surface 32 and the downward sloping surface 31 Fluid guide tabs 32a and 31a are formed. Accordingly, the fluid guiding jaws 32a and 31a can prevent the damping fluid pressing the upward sloping surface 32 and the downward sloping surface 31 from spreading toward the upward sloping surface 32 and the downward sloping surface 31 without spreading to both sides of the wing portion 30. [ The wing portion 30 is guided to the side of the inclined surface 31 so as to press the wing portion 30 in the vertical direction.

Meanwhile, the housing 40 has a hollow portion therein, and the housing cap 90 is coupled to cover the opening of the hollow portion. A sealing member 80 is preferably disposed between the housing 40 and the housing cap 90 to prevent leakage of the damping fluid filled inside.

A second rubber ring 70 is provided between the housing cap 90 and the sealing member 80. A first rubber ring 60 is provided between the rotation guide plate 24 and the housing 40, Respectively. Here, the first rubber ring 60 and the second rubber ring 70 prevent external leakage of the damping fluid filled in the housing 40 and wear due to rotational friction of the respective parts.

The housing 40 is disposed to be connected to the main body of the rice cooker so that rotation of the rotary damper device 200 is restrained and the rotor 20 and the wing portion 30 are inserted into the hollow portion . At this time, a damping fluid is filled between the outer periphery 23 of the rotor portion 20 and the inner periphery of the housing 40, so that damping fluid that flows at an interval between the inner periphery of the housing 40 and the end of the wing portion 30 It provides rotational damping force by the fluid.

At this time, the gap functions as a movement path of the damping fluid having a viscosity, and the damping force for buffering the rotational force becomes larger as the gap is narrowed. Of course, it is preferable that the damping fluid includes a liquid capable of forming a damping force through atmospheric pressure, as well as a liquid state operating oil having viscosity such as oil or the like, which is typically used to form a damping force through the viscous flow.

The drive in which the above-described rotary damper device 200 selectively provides rotary damping force in the damping rotation direction and the damping rotation direction will be described in more detail below.

4A and 4B, a number of stoppers 50 corresponding to the blades 21 are provided on the inner circumference of the housing 40 so that the rotatable angle of the rotor unit 20 is limited. desirable.

In the inner periphery 42 of the housing 40, a seesaw groove 41 having a seesaw protrusion 41a is formed on the inside thereof. The stopper 50 is provided in the seesaw groove 41. The stopper 50 selectively severs the outer periphery of the rotor portion 20 by seeping motion about the seesaw protrusion 41a by the pressure of the damping fluid to shield the movement of the damping fluid .

Specifically, when the rotor portion 20 is rotated in the damping rotation direction, the damping fluid located in the space a between the stopper 50 and the blade 21 and the wing portion 30 is compressed, The pressure in the damping rotation direction is applied to the first surface of the wing portion 30 and the pressure in the damping rotation direction is applied to the stopper 50. [

The pressure applied to the stopper 50 causes the stopper 50 to seesaw around the seesaw 41a. Accordingly, the shielding edge portion 51 of the stopper 50 contacts the outer periphery 23 of the rotor portion 20 to block the movement of the damping fluid.

Accordingly, since the damping fluid does not flow between the stopper 50 and the rotor 20, the damping fluid forms a higher pressure toward the first surface 30a of the wing 30.

The stopper 50 can cancel the rotational force of the rotor part 20 by a seesaw motion when the rotor part 20 rotates in the damping rotation direction and the rotor part 20 and the shielding corner part 51, The pressure of the damping fluid applied to the wing portion 30 increases and the wing portion 30 moves upward to form a damping force. Therefore, when the damping rotation direction is rotated, the rotation speed does not decrease rapidly but is decelerated step by step, so that the quality of the product can be improved.

Also, since the stopper 50 disperses and supports the pressure applied to the wing portion 30 during deceleration, the durability of the product can be improved by preventing the wing portion 30 from being damaged.

Of course, in this embodiment, the stopper 50, which performs seesaw motion according to the rotation direction, is provided to improve the quality of the product through the stepwise rotation speed deceleration, and the damping force at the time of rotation in the damping rotation direction and rotation in the damping release rotation direction The damping force change according to the rotation direction necessary for smooth operation of the product can be provided by only the up and down movement of the wing portion 30. [

Therefore, the stopper 50 may be replaced with a stationary stopper (not shown) which is held in close contact with the outer circumference of the rotor portion 20 so as to shield the flow of the damping fluid flowing along the rotational direction of the wing portion 30, May also be used.

The term substantially in close contact means that the damping fluid does not flow between the end portion of the fixed stopper and the outer periphery of the rotor portion 20 but is in close contact with the rotor portion 20 at an interval that does not restrict the rotation of the rotor portion 20 .

A pressure regulating groove 22 is formed on the outer circumference of the rotor 20. The pressure regulating groove 22 is formed along the radial direction of the rotor portion and is spaced apart from the blade 21.

At this time, the pressure adjusting groove 22 forms a minute gap between the stopper 50 and the rotor 20 so that the rotary shaft 10 is rotated at a too high speed to excessively compress the damping fluid The pressure of the damping fluid is reduced to prevent the damping fluid from leaking to the outside of the housing 40.

Of course, when the amount of flow of the damping fluid flowing between the stopper 50 and the rotor portion 20 due to the pressure adjusting groove 22 is too large, the damping force of the device may be reduced, 22 are preferably formed as fine grooves smaller than a predetermined depth.

The pressure applied to the first surface of the wing portion 30 is dispersed by the pressure in the direction of the blade 21 and the pressure in the direction of the inner circumference 42 of the housing 40 from the upward inclined surface 32.

At this time, the front surface of the blade 21 on the side of the damping rotation direction is formed as an upwardly inclined guide surface 21a. That is, the guide surface 21a has an inclined shape protruding upward toward the damping release rotation direction.

The wing portion 30 is moved upward by the pressure in the direction of the inner circumference 42 of the housing 40 dispersed in the upward inclined surface 32 and the guide surface 21a is pressed by the pressure in the direction of the blade 21, And can be further brought into close contact with the inner circumference 42 side of the housing 40. The guide surface 21a improves the adhesion between the wing portion 30 and the inner circumference of the housing 40 to further stabilize the upward movement of the wing portion 30 for forming the damping force in the damping rotation direction, It is possible to improve the reliability.

Further, the guide surface 21a disperses an external force applied by the rotation in the damping rotation direction by a force in a direction parallel to the guide surface 21a and a force in a direction orthogonal to the force, so that, even when an excessive force is applied, The durability of the product can be improved by providing damping drive smoothly without damaging the wing portion 21 and the wing portion 30.

In addition, a force in a direction parallel to the guide surface 21a can further bring the wing portion 30 into close contact with the inner circumference of the housing 40.

The inner side of the wing portion 30 is formed with an upwardly sloping guide surface 21a on the front side of the blade 21 in the damping rotation direction when the upper side is moved, A slide groove portion 33 formed on the back surface is formed.

Therefore, since the slide groove portion 33 is in close contact with the guide surface 21a of the blade 21 by the pressure of the dispersed blade direction, the gap between the slide groove portion 33 and the guide surface 21a is substantially So that the damping fluid does not flow.

The damping fluid flows at narrow intervals between the end 35 of the wing portion 30 and the inner periphery 42 of the housing 40 and the damping fluid flowing at narrow intervals is subjected to a strong damping .

This allows the damping fluid to be concentrated between the end portion 35 of the wing portion 30 and the inner periphery 42 of the housing 40 to provide a high damping force even if the same viscous damping fluid is used.

5A and 5B, when the rotor portion 20 is rotated in the damping-release rotational direction, the stopper 50 is rotated in the space b between the blade 21 and the wing portion 30 The damping fluid thus placed is compressed and applies a damping rotation direction pressure to the second surface 30b of the wing portion 30.

The pressure in the direction of the damping release rotation applied to the stopper 50 moves the damping fluid to a space between the rotor 20 and the damping fluid guide surface 52 of the stopper 50.

Accordingly, the stopper 50 is seesawed so that the shielding edge portion 51 is spaced apart from the outer periphery 23 of the rotor portion 20 to form a passage through which the damping fluid can flow.

The pressure applied to the second surface 30b of the wing portion 30 is dispersed by the pressure in the direction of the blade 21 from the downward slope 31 and the pressure in the direction of the outer circumference 23 of the rotor portion 20 So that the wing portion 30 is moved downward so as to be in close contact with the outer circumference 23 side of the rotor portion 20.

At this time, since the slide groove portion 33 is closely sealed to the rear surface 21c of the blade 21 by the pressure in the direction of the dispersed blade 21, the damping fluid flows into the slide groove portion 33 And does not flow between the rear surfaces 21c.

The damping fluid flowing at a wide interval between the end portion 35 of the wing portion 30 and the inner periphery 42 of the housing 40 forms a weak damping deceleration due to the reduced flow resistance. Since the damping fluid flows together into the space between the rotor portion 20 and the damping fluid guide surface 52 of the stopper 50, the return rotation of the rotor portion 20 in the damping- Lt; / RTI >

As described above, the rotary damper device 200 effectively damps the rotation speed when the rotary shaft 10, which is engaged with the rotor 20 and rotates integrally therewith, rotates in the damping rotation direction and rotates in the damping- So that the efficiency and usability of the product can be improved.

On the other hand, a guide projection 36 is protruded from one side of the rear surface 21c of the blade 21 in the damping release rotation direction and the inner surface of the wing portion 30 facing the rear surface 21c, A guide groove 21b into which the guide protrusion 36 is inserted is formed.

6, a guide protrusion 36 protruding from the inside of the wing portion 30 is coupled to the rear surface 21c of the blade 21 on the side of the damping release rotation direction, And a guide groove 21b for guiding movement can be formed.

The guide groove portion 21b is formed to have the same width as the guide protrusion 36 so as not to flow left and right when the guide protrusion 36 is moved up and down, The protrusion 36 is engaged with the guide groove 21b and can slide up and down.

Therefore, when the wing portion 30 is moved up and down, it is possible to prevent the axial flow of the wing portion 30 in the rotor portion 20 to prevent the damping fluid from leaking to the side end portion of the wing portion 30 , The pressure of the damping fluid can be stably transmitted to the wing portion (30), so that the rotational damping force due to the up and down movement of the wing portion (30) can be improved.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

200: rotary damper device 10: rotary shaft
20: rotor part 30: wing part
40: housing 50: stopper
60: first rubber ring 70: second rubber ring
80: sealing member 90: housing cap
11: polygonal cross section 12: nulling section
21: blade 21a: guide face
21b: guide groove portion 21c: rear surface
24: rotation guide plate 32: upward slope surface
31: downward inclined surface 33: slide groove
41: seesaw groove 51: shielding edge portion
52: Damping fluid guide surface

Claims (5)

A rotating shaft connected to the rotational damping object;
A rotor portion having a blade projecting on an outer periphery of a cylindrical body fixed to one side of the rotary shaft;
And an upper inclined surface is formed at a lower portion of the first surface at the damping rotation direction side and a lower inclined surface is formed at an upper portion of the second surface at the damping release rotation direction side, A wing portion which is moved upward and downward; And
And a housing provided to provide a rotational damping force through the damping fluid flow through the gap between the inner periphery of the hollow portion and the end portion of the wing portion, the damping fluid being filled in the hollow portion formed to be interposed between the rotor portion and the wing portion, Damper device. The method according to claim 1,
Wherein the front surface of the blade on the side of the damping rotation direction is formed as an upwardly inclined guide surface. The method according to claim 1,
Wherein the upward inclined surface is inclined upward toward the damping rotation direction at the center of the wing portion at the lower edge portion of the first surface,
Wherein the downwardly sloping surface is formed at an upper edge portion of the second surface so as to be inclined downward from a center of the wing portion toward a damping release rotation direction. The method according to claim 1,
Wherein a guide protrusion is protruded from one side of a rear surface of the blade in the damping release rotation direction and an inner surface of the wing portion facing the rear surface and a guide groove portion into which the guide protrusion is inserted is formed on the other side. Device. The method according to claim 1,
A seesaw groove having a seesaw projecting thereon is formed on the inner side of the housing,
Wherein the seesaw groove is provided with a stopper selectively shielding movement of the damping fluid in contact with the outer periphery of the rotor portion as the seesaw is centered around the seesaw by pressure of the damping fluid.

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