JP5112175B2 - Damper - Google Patents

Description

  The present invention relates to a damper that generates a braking force only when rotating in one direction, and can reduce the movement of a control valve at the time of switching the braking direction and improve the response.

Conventionally, a rotor having a housing, a rotor body rotatably accommodated in the housing, a transmission shaft protruding from the rotor body toward the outside of the housing, a viscous fluid filled in the housing, and the housing and the rotor body Is opened between the housing and the rotor main body and allows the viscous fluid to pass therethrough, and at the time of reverse rotation, the switching channel is closed. (See, for example, paragraphs “0009” to “0012” in FIG. 1 and FIG. 1 and paragraphs “0009” to “0013” in FIG. 1 and FIG. 1). And paragraph numbers “0008” to “0009” of Patent Document 3, see FIGS.
JP 2006-242318 A (paragraph numbers “0009” to “0012”, FIG. 1) Japanese Patent No. 2581655 (paragraph numbers “0009” to “0013”, FIG. 1) Japanese Patent No. 3125416 (paragraph numbers “0008” to “0009”, paragraph number “0011”, FIGS. 1 to 3 and FIG. 6)

However, the above-described conventional damper has a problem in that the open / close channel is not opened unless the blades of the rotor body and the control valve are relatively displaced.
On the other hand, in the above-mentioned Patent Document 3, a V-shaped control slit is formed in the control valve, and when the sliding resistance between the two increases due to uneven wear with the housing, the control slit is provided. The viscous fluid is allowed to leak through (see paragraph number “0011” of FIG. 6 of Patent Document 3).

However, at the time of wear, when the rotor rotates in the braking direction, viscous fluid always leaks through the control slit, and there is no effect of reducing the movement of the control valve when switching the control valve. The present invention is different from the present invention in that the problem to be solved by the invention is different.
Accordingly, each invention described in each claim has been made in view of the problems of the conventional techniques described above, and the object thereof is as follows.
(Claim 1)
The object of the present invention is as follows.

That is, according to the first aspect of the present invention, the outlet on the downstream side of the viscous fluid passing through the open / close flow path is enlarged, so that the wing piece of the rotor body and the control valve are displaced by a relatively small amount. The channel can be opened.
Therefore, according to the first aspect of the present invention, the movement of the control valve at the time of switching the braking direction can be reduced and the response can be improved.

In addition to this, the invention according to claim 1 is configured such that a flow path expanding portion can be formed by cutting out a part of the control valve.
  Furthermore, the invention according to claim 1 is configured such that the flow passage enlarged portion can be formed in a groove shape.
(Claim 2)
  The invention according to claim 2 aims at the following points.

  In other words, the invention according to claim 2 expands and closes the outlet of the viscous fluid passing through the open / close flow path, so that the wing piece of the rotor body and the control valve are displaced relatively little, so that the open / close The channel can be opened.
  Therefore, according to the second aspect of the present invention, the movement of the control valve at the time of switching the braking direction can be reduced, and the response can be improved.

  In addition to this, the invention described in claim 2 is configured such that a flow path expanding portion can be formed by cutting out a part of the control valve.
  Furthermore, the invention described in claim 2 is configured such that the flow passage enlarged portion can be opened sideways.
(Claim 3)
  The invention according to claim 3 has the following object.

  In other words, the invention according to claim 3 expands and closes the outlet of the viscous fluid passing through the open / close flow path, so that the wing piece of the rotor body and the control valve are displaced relatively little, so that the open / close The channel can be opened.
  Therefore, according to the third aspect of the present invention, the movement of the control valve at the time of switching the braking direction can be reduced and the response can be improved.

In addition to this, the invention described in claim 3 is configured such that a flow passage enlarged portion can be formed by cutting out a part of the rotor.
(Claim 4)
The invention according to claim 4 has the following object in addition to the object of the invention according to any one of claims 1 to 3 .

That is, the invention according to claim 4 is configured such that a flow passage enlarged portion can be formed by cutting out a part of the blade base portion of the rotor.
(Claim 5)
The invention described in claim 5 has the following object in addition to the object of the invention described in claim 2 or claim 3 described above .

That is, the invention according to claim 5 is configured such that the flow passage enlarged portion can be formed in a groove shape.
(Claim 6)
The invention described in claim 6 has the following object in addition to the object of the invention described in claim 2 or claim 3 .

  That is, the invention according to claim 6 is configured such that the flow passage enlarged portion can be formed in a hole shape.

Each invention described in each claim has been made to achieve each of the above-mentioned objects, and features of each invention will be described below using embodiments of the invention shown in the drawings. .
In addition, the code | symbol in parenthesis shows the code | symbol used in embodiment of invention, and does not limit the technical scope of this invention.
Also, the drawing numbers indicate the drawing numbers used in the embodiments of the invention and do not limit the technical scope of the present invention.
(Claim 1)
The invention described in claim 1 is characterized by the following points.

First, the damper (10) has the following configuration as shown in FIGS.
(1) Housing (20)
(2) Rotor (30)
As shown in FIGS. 2 to 5, for example, the rotor (30) is a rotor main body (90) that is rotatably accommodated in the housing (20), and protrudes out of the housing (20) from the rotor main body (90). And a transmission shaft (100).

(3) Viscous fluid (40)
The viscous fluid (40) is, for example, filled in the housing (20) as shown in FIGS.
(4) Control valve (50)
The control valve (50) is disposed between the housing (20) and the rotor main body (90), for example, as shown in FIGS. 3 and 4, and, for example, as shown in FIG. During forward rotation (for example, rotation in the arrow X direction), the open / close flow path (130, not shown) through which the viscous fluid (40) can pass is closed, and for example, as shown in FIG. For opening and closing the open / close channel (130).

Secondly, the rotor body (90) has the following configuration as shown in FIGS.
(5) Wing pieces (120)
For example, as shown in FIGS. 4 and 6, the blade piece (120) extends radially and is covered by the control valve (50).
Thirdly, the control valve (50) has the following configuration, for example, as shown in FIGS.

(6) Front wall (51)
For example, as shown in FIG. 12, the front wall (51) is positioned in front of the rotation direction during normal rotation (for example, rotation in the direction of arrow X), and comes into contact with the blade piece (120), thereby 130) is closed, and, for example, as shown in FIG. 1, it is pushed by the viscous fluid (40) during reverse rotation (for example, rotation in the arrow Y direction) and moves in the normal rotation (for example, rotation in the arrow X direction). This is for opening the open / close channel (130).

(7) Back wall (52)
For example, as shown in FIG. 12, the rear wall (52) is located rearward in the rotation direction during normal rotation (for example, rotation in the arrow X direction).
(8) Opening (53)
For example, as shown in FIGS. 1 and 8 to 11, the opening (53) is formed in the rear wall (52) and communicates with the blade-side flow path (123).

Fourth, the following configuration is provided between the blade piece (120) and the front wall (51) as shown in FIGS.
(9) Channel expansion part (54)
For example, as shown in FIG. 1 and FIGS. 8 to 11, the flow path expanding section (54) is for expanding the outlet on the downstream side of the viscous fluid (40) passing through the open / close flow path (130).

Specifically, in the first embodiment shown in FIGS. 1 to 14, the flow path expanding portion (54) is formed on the front wall (51) as shown in FIG. 11, for example.
Similarly, in the second embodiment shown in FIG. 18, the flow channel enlarged portion (200) is formed on the front wall (51a) as shown in FIG. 18, for example.
In the third embodiment shown in FIG. 19 and FIG. 20, the flow path expanding portion (210) is formed by, for example, as shown in FIG. 19, the rotor body (90b) of the rotor (30b), specifically the blade base ( 121b).

In the fourth embodiment shown in FIG. 21 and FIG. 22, the flow path expanding portion (220) is formed on the outer periphery of the rotor body (90c) of the rotor (30c), for example, as shown in FIG.
Thirdly, as shown in FIG. 11, for example, the flow path enlarged portion (54) is formed by cutting out a part of the end portion of the front wall (51).
Fourth, the flow path expanding portion (54) is formed in a groove shape, for example, as shown in FIG.
(Claim 2)
The invention described in claim 2 has the following features in addition to the first to third features of the invention of claim 1 described above.

  That is, the wing piece (120) has the following configuration as shown in FIGS.
        (1) Wing base (121)
  For example, as shown in FIG. 12, the blade base (121) cooperates with the control valve (50) to prevent passage of the viscous fluid (40).
        (2) Wing projection (122)
  For example, as shown in FIGS. 5 to 7, the blade protrusions (122) extend radially from the blade base (121), are separated in the axial direction of the rotor body (90), and have at least one pair.

        (3) Blade side flow path (123)
  For example, as shown in FIG. 5, the blade-side flow path (123) is formed within the interval between the blade protrusions (122) and allows the viscous fluid (40) to pass therethrough.
  Second, the blade base (121) has the following configuration, for example, as shown in FIG.
        (4) Slope (124)
  The slope (124) is inclined obliquely as shown in FIG. 7, for example.

        (5) Plane (125)
  For example, as shown in FIG. 7, the flat surface (125) extends in the tangential direction of the rotor main body (90) from the inclined lower end of the inclined surface (124), and has a leading end portion.
  Thirdly, the front wall (51) has the following configuration, for example, as shown in FIG.
        (6) Inside surface (55)
  For example, as shown in FIG. 14, the inner side surface (55) faces the slope (124) and is inclined in parallel with the slope (124).

        (7) Sliding surface (56)
  For example, as shown in FIG. 14, the sliding contact surface (56) is in sliding contact with the plane (125) and is parallel to the plane (125).
  Fourth, as shown in FIG. 14, for example, the flow path enlargement section (54) is parallel to the plane (125) and has a rotational direction during normal rotation (for example, rotation in the arrow X direction) from the inner surface (55). It extends sideways toward the front.
(Claim 3)
  The invention described in claim 3 has the following features in addition to the first and second features of the invention of claim 1 described above.

  That is, the flow path enlarged portion (210) is formed by cutting out a part of the rotor body (90) as shown in FIGS. 19 and 20, for example.
  Specifically, in the third embodiment shown in FIGS. 19 and 20, the flow path enlargement part (210) is replaced with a blade base part of the rotor body (90b) of the rotor (30b) as shown in FIG. 19, for example. (121b).

In the fourth embodiment shown in FIG. 21 and FIG. 22, the flow path expanding portion (220) is formed on the outer periphery of the rotor body (90c) of the rotor (30c), for example, as shown in FIG.
(Claim 4)
The invention described in claim 4 is characterized by the following points in addition to the features of the invention described in any one of claims 1-3 .

First, the wing piece (120) has the following configuration as shown in FIGS. 19 and 20, for example.
(1) Wing base (121b)
For example, as shown in FIGS. 19 and 20, the blade base (121b) cooperates with the control valve (50a) to prevent passage of viscous fluid (not shown).
(2) Wing protrusion (122b)
For example, as shown in FIGS. 19 and 20, the blade protrusions (122b) extend radially from the blade base (121b) and are separated from each other in the axial direction of the rotor body (90b), and there are at least one pair.

(3) Blade side flow path (123b)
For example, as shown in FIG. 5, the blade-side flow path (123b) is formed within the space between the blade protrusions (122b) and allows viscous fluid (not shown) to pass therethrough.
Second, the flow channel enlargement part (210) is formed by cutting out a part of the blade base part (121b) as shown in FIGS. 19 and 20, for example.
(Claim 5)
The invention described in claim 5 is characterized by the following points in addition to the features of the invention described in claim 2 or claim 3 described above .

That is, the flow path enlarged portion (54) is formed in a groove shape, for example, as shown in FIG.
(Claim 6)
The invention described in claim 6 has the following features in addition to the features of the invention described in claim 2 or claim 3 described above .
That is, the flow path enlarged portion (200) is formed in a hole shape, for example, as shown in FIG.

Since this invention is comprised as mentioned above, there exists an effect as described below.
(Claim 1)
That is, according to the first aspect of the present invention, by expanding the outlet on the downstream side of the viscous fluid passing through the open / close flow path, the blade piece of the rotor body and the control valve are displaced relatively small. The open / close channel can be opened.

Therefore, according to the first aspect of the present invention, the movement of the control valve at the time of switching the braking direction can be reduced and the response can be improved.
In addition, according to the first aspect of the present invention, the flow path expanding portion can be formed by cutting out a part of the control valve.
Furthermore, according to the first aspect of the present invention, the channel enlarged portion can be formed in a groove shape.
(Claim 2)
According to invention of Claim 2, there exist the following effects.

  That is, according to the second aspect of the present invention, by expanding the outlet on the downstream side of the viscous fluid passing through the open / close channel, the wing piece of the rotor body and the control valve are displaced relatively small. The open / close channel can be opened.
  Therefore, according to the second aspect of the present invention, the movement of the control valve at the time of switching the braking direction can be reduced, and the response can be improved.

  In addition to this, according to the second aspect of the present invention, the flow path expanding portion can be formed by cutting out a part of the control valve.
  Furthermore, according to the second aspect of the present invention, the flow path expanding portion can be opened sideways.
(Claim 3)
  According to invention of Claim 3, there exist the following effects.

  That is, according to the third aspect of the present invention, by expanding the outlet on the downstream side of the viscous fluid passing through the open / close channel, the wing piece of the rotor body and the control valve are displaced relatively small. The open / close channel can be opened.
  Therefore, according to the third aspect of the present invention, the movement of the control valve at the time of switching the braking direction can be reduced and the response can be improved.

In addition, according to the third aspect of the invention , the flow path enlarged portion can be formed by cutting out a part of the rotor .
(Claim 4)
According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1-3, the following effect is provided.

That is, according to the fourth aspect of the present invention, the flow passage enlarged portion can be formed by cutting out a part of the blade base portion of the rotor.
(Claim 5)
According to the invention described in claim 5, in addition to the effect of the invention described in claim 2 or claim 3, the following effect can be obtained.

That is, according to the fifth aspect of the present invention, the channel enlarged portion can be formed in a groove shape.
(Claim 6)
According to the invention described in claim 6, in addition to the effect of the invention described in claim 2 or claim 3, the following effect can be obtained.

  That is, according to the sixth aspect of the present invention, the flow channel enlarged portion can be formed in a hole shape.

(Explanation of drawings)
1 to 14 respectively show an example of the first embodiment of the present invention.
FIG. 1 is a diagram for explaining a state in which no braking torque is generated. FIG. 2 is an explanatory diagram for explaining the flow of viscous fluid, FIG. 2 is an exploded perspective view of the damper, FIG. 3 is a longitudinal sectional view of the damper, and FIG. FIG. 5 is a side view of the rotor, FIG. 6 is a bottom view of the rotor, FIG. 7 is a cross-sectional view taken along line AA in FIG. 5, and FIG. 8 is a side view in which a part of the control valve is cut away. 9, FIG. 8 is a bottom view of the control valve, FIG. 10 is a cross-sectional view taken along line BB in FIG. 9, FIG. 11 is a perspective view of the control valve, FIG. 12 corresponds to FIG. FIG. 13 is an explanatory view for explaining the flow of the viscous fluid, and FIG. 13 is a view for explaining the non-occurrence of the braking torque, explaining the relationship between the rotor blade and the control valve. FIG. 14 is a partially enlarged view of FIG. 13.

15 to 17 show comparative examples of the embodiment of the present invention.
FIG. 15 corresponds to FIG. 13 and is an explanatory diagram for explaining the relationship between the rotor blades and the control valve according to the comparative example. FIG. 16 corresponds to FIG. 11 and is a perspective view of the control valve according to the comparative example. FIG. 17 corresponds to FIG. 14 and shows a partially enlarged view of FIG.
FIG. 18 shows an example of the second embodiment of the present invention, which shows a perspective view of the control valve.

19 and 20 show an example of the third embodiment of the present invention, respectively. 19 and 20 are for explaining the relationship between the rotor blades and the control valve. FIG. 19 is an explanatory diagram for explaining the non-occurrence state of the braking torque, and FIG. 20 is the generation of the braking torque. An explanatory view for explaining a state is shown respectively.
21 and 22 show an example of the fourth embodiment of the present invention, respectively. FIG. 21 is a diagram for explaining a state in which braking torque is not generated, and is a diagram for explaining the flow of viscous fluid. FIG. 22 is a sectional view of the rotor.
(Damper 10)
2 and 3, reference numeral 10 denotes a damper. The damper 10 has a one-way mechanism, and is used for a hinge of an opening / closing body such as a toilet seat or a toilet lid of a Western-style toilet. When the door is closed, a braking force is applied so that the opening / closing body closes slowly and quietly.

The damper 10 is roughly composed of the following parts as shown in FIGS.
The following (1) to (5) will be described later.
(1) Housing 20
(2) Rotor 30
(4) Viscous fluid 40
(5) Control valve 50
The parts of the damper 10 are not limited to the above (1) to (5).
(Housing 20)
As shown in FIGS. 2 to 3, the housing 20 is for housing a part of the rotor 30, the viscous fluid 40, and the control valve 50.

Specifically, the housing 20 is roughly composed of the following parts.
The following (1) to (3) will be described later.
(1) Housing body 60
(2) Cap 70
(3) O-ring 80
The parts of the housing 20 are not limited to the above (1) to (3).
(Housing body 60)
As shown in FIGS. 2 to 3, the housing body 60 is formed in a cylindrical shape, has an opening surface 61 at one end, and has a bottom wall 62 at the other end.

Inside the housing main body 60, a pair of rotation restricting walls 63, 63 projecting inward in the radial direction from the inner peripheral surface and facing each other.
Further, as shown in FIG. 3, the inner surface of the bottom wall 62 is provided with a shaft groove 64 for rotatably supporting one end portion of the rotor 30. A shaft projection 65 is provided on the outer surface of the bottom wall 62.
(Cap 70)
As shown in FIG. 3, the cap 70 is for closing the opening surface 61 of the housing body 60, and a circular through hole 71 penetrating the front and back surfaces is provided in the center, and the other end of the rotor 30 is provided. Through which it can rotate.

Although not shown, the cap 70 is thermally welded to the housing body 60 after the damper 10 is assembled.
(O-ring 80)
The O-ring 80 is for sealing between the through hole 71 of the cap 70 and the rotor 30.
(Rotor 30)
As shown in FIGS. 2 to 5, the rotor 30 includes the following units.

The following (1) to (4) will be described later.
(1) Rotor body 90
(2) Transmission shaft 100
(3) Flange part 110
(4) Wing piece 120
In addition, each part of the rotor 30 is not limited to above-mentioned (1)-(4).
(Rotor body 90)
The rotor main body 90 is rotatably accommodated in the housing main body 60 as shown in FIGS.

Specifically, the rotor main body 90 has the following parts as shown in FIGS.
In addition, each part of the rotor main body 90 is not limited to following (1)-(2).
(1) Protruding shaft 91
As shown in FIGS. 5 and 6, the protruding shaft 91 protrudes from the distal end portion of the rotor main body 90 and is rotatably fitted in the shaft groove 64 on the inner surface of the bottom wall 62 of the housing main body 60.

(2) Recess 92
As shown in FIGS. 5 and 7, the recess 92 is adjacent to a blade piece 120 described later, and extends in the reverse rotation direction of the rotor 30 (the non-operational direction of the braking force).
(Transmission shaft 100)
As shown in FIGS. 2 to 5, the transmission shaft 100 projects from the rotor body 90 through the through hole 71 of the cap 70 toward the outside of the housing 20. Specifically, the transmission shaft 100 is continuous with the rotor main body 90 via a flange portion 110, which will be described later, has an outer diameter equal to or smaller than the inner diameter of the through hole 71 of the cap 70, and has a non-circular cross section. .
(Flange part 110)
As shown in FIGS. 2 to 5, the flange portion 110 is located between the rotor body 90 and the transmission shaft 100, and the outer diameter is made larger than the inner diameter of the through-hole 71 of the cap 70, thereby removing the rotor body 90. Is to prevent.
(Wing piece 120)
2-7, the blade piece 120 extends radially from the outer periphery of the rotor body 90 and is covered with a control valve 50 described later. A pair of wing pieces 120 are formed so as to face each other.

Specifically, the wing piece 120 is formed in a substantially trapezoidal cross-sectional shape having a slope in the forward rotation direction in which the rotor body 90 rotates in the direction in which the braking force acts, and having a surface that is cut in the reverse rotation direction. Yes.
The wing piece 120 has the following parts as shown in FIGS.
The following (1) to (3) will be described later.
(1) Wing base 121
(2) Wing protrusion 122
(3) Blade side channel 123
In addition, each part of the wing | blade piece 120 is not limited to above-mentioned (1)-(3).
(Wing base 121)
As shown in FIGS. 6 and 7, the blade base 121 prevents passage of the viscous fluid 40 in cooperation with a control valve 50 described later.

Specifically, the blade base 121 includes the following surfaces as shown in FIG.
Each surface of the blade base 121 is not limited to the following (1) to (2).
(1) Slope 124
As shown in FIG. 7, the slope 124 is located forward in the rotational direction during normal rotation (rotation in the direction of arrow X (braking state)), and is inclined obliquely.

(2) Plane 125
As shown in FIG. 7, the plane 125 is a tangential direction of the rotor main body 90 from the inclined lower end 134 of the inclined surface 124, and toward the front in the rotational direction during forward rotation (rotation in the arrow X direction (braking state)). It extends and has a sharp tip.
(Wing projection 122)
As shown in FIGS. 5 to 7, the blade protrusions 122 extend radially from the blade base 121, and are separated from each other in the axial direction of the rotor body 90, so that at least a pair of blade protrusions 122 are provided.

Although two blade protrusions 122 are provided, the present invention is not limited to this, and three or more blade protrusions may be provided.
(Wing side passage 123)
As shown in FIG. 5, the blade-side channel 123 is formed within the interval between the blade projections 122 and allows the viscous fluid 40 to pass therethrough.
(Viscous fluid 40)
As shown in FIGS. 3 and 4, the viscous fluid 40 is filled in the housing body 60, and for example, silicon oil is used.

In addition, although silicon oil was illustrated as the viscous fluid 40, it is not limited to this.
(Control valve 50)
As shown in FIGS. 1 and 12, the control valve 50 is disposed between the inner peripheral surface of the housing main body 60 and the outer peripheral surface of the rotor main body 90, and is normally rotated in one direction of the rotor 30 (rotation in the arrow X direction). This is for closing the open / close flow path 130 through which the viscous fluid 40 can pass during (braking state)) and opening the open / close flow path 130 during reverse rotation (rotation in the direction of arrow Y (non-braking state)).

Specifically, as shown in FIG. 10, the control valve 50 is formed in a U-shaped cross section that opens toward the blade piece 120 of the rotor body 90.
Further, the control valve 50 includes the following parts as shown in FIGS.
The following (1) to (4) will be described later.
(1) Front wall 51
(2) Back wall 52
(3) Opening 53
(4) Channel expansion part 54
Each part of the control valve 50 is not limited to the above (1) to (4).
(Front wall 51)
As shown in FIGS. 10 and 12, the front wall 51 is positioned forward in the rotational direction during normal rotation (rotation in the direction indicated by the arrow X (braking state)), and comes into contact with the blade base 121 so that the blade-side flow path 123 is closed, and at the time of reverse rotation (rotation in the direction of arrow Y (non-braking state)), it is pushed by the viscous fluid 40 and moves in the normal rotation direction, thereby generating an open / close flow path 130 between the blade base 121 and Is for.

Specifically, the front wall 51 has the following surfaces as shown in FIG.
In addition, each surface of the front wall 51 is not limited to following (1)-(2).
(1) Inner side 55
The inner side surface 55 faces the inclined surface 124 of the blade base 121 and is inclined in parallel with the inclined surface 124.
(2) Sliding surface 56
The sliding surface 56 is in sliding contact with the plane 125 of the blade base 121 and is formed in parallel with the plane 124.
(Back wall 52)
As shown in FIGS. 10 and 12, the rear wall 52 is positioned rearward in the rotational direction during normal rotation (rotation in the direction of arrow X (braking state)).
(Opening 53)
As shown in FIGS. 1 and 10, the opening 53 is formed in the rear wall 52 and communicates with the blade-side channel 123.
(Channel expansion part 54)
As shown in FIGS. 1 and 11, the flow channel expanding portion 54 expands the downstream outlet of the viscous fluid 40 that passes through the open / close flow channel 130 by notching a part of the end portion of the front wall 51. Is for.

Specifically, the flow path expanding portion 54 is formed in a groove shape by cutting out an end surface of the front wall 51, that is, a part of the sliding contact surface 56 into a U shape. For this reason, the flow path expanding portion 54 extends laterally from the inner surface 55 toward the front in the rotational direction during forward rotation (rotation in the direction of arrow X (braking state)) on the plane 125 of the blade base 121.
In addition, although the flow path expansion part 54 was formed in groove shape, it is not limited to this, You may form in the hole shape which penetrates the front and back of the front wall 51 although it is not illustrated.
(Description of operation of damper 10)
The operation of the damper 10 having the above configuration will be described.

First, when the rotor 30 is rotated in the normal rotation direction (rotation in the direction of arrow X) with respect to the housing 20, as shown in FIG. 12, the open / close flow path 130 (between the blade piece 120 of the rotor 30 and the control valve 50). (Not shown) does not occur.
For this reason, when the rotor 30 rotates in the forward rotation (rotation in the arrow X direction) direction, the braking torque increases and a braking action occurs.

On the other hand, when the rotor 30 is rotated in the reverse direction (rotation in the arrow Y direction), as shown in FIG. 1, the control valve 50 rotates in the normal direction (rotation in the arrow X direction) with respect to the blade piece 120 of the rotor 30. The open / close flow path 130 is generated by sliding to.
When the opening / closing channel 130 is generated, the viscous fluid 40 flows out from the channel expanding portion 54 through the opening / closing channel 130.

For this reason, when the rotor 30 is rotated in the reverse direction (rotation in the arrow Y direction), the braking torque is reduced and the braking action is lost.
(Comparison with comparative example)
Next, a comparative example will be described with reference to FIGS.
As shown in FIG. 17, the damper 10 a according to the comparative example is a “flow channel expanding portion 54” (see FIG. 11) of the control valve 50 according to the first embodiment described above with reference to FIGS. 1 to 14. Are omitted from the control valve 50a according to the comparative example.

In the description of the comparative example, the same components as those in the first embodiment are denoted by the same reference numerals with “a” added, and the description thereof is omitted.
When comparing the damper 10 according to the first embodiment and the damper 10a according to the comparative example, when the forward rotation (rotation in the arrow X direction) is reversed (rotation in the arrow Y direction), the first embodiment The movement angle of the control valve 50 having the “flow path expanding portion 54” according to the embodiment is “L1” (about 2 degrees), whereas the “flow path expanding portion 54” is omitted. The moving angle of the valve 50a is “L2” (about 4 degrees).

When “L1” (about 2 degrees) is compared with “L2” (about 4 degrees), “L1” (about 2 degrees) is small, and the switching of the control valve 50 according to the first embodiment is quick. It can be seen that the response is high.
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.

A feature of the present embodiment is that the control valve 50 is provided with a hole-shaped flow path expanding portion 200.
That is, the flow path enlargement portion 200 penetrates from the inner side surface 55 of the front wall 51 to the outer side surface, and is formed in a square shape.
In addition, although the flow path enlarged portion 200 is formed in a square shape, it may be formed in a circular shape or the like. Further, the number of flow path expanding portions 200 is not limited to one, and a plurality of flow path expanding portions 200 may be provided.

In the description of this embodiment, the same components as those in the first embodiment described above with reference to FIGS.
(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 19, the present embodiment is characterized in that a flow passage enlargement section 210 is provided on the blade piece 120b of the rotor 30b.

That is, as shown in FIG. 19, the flow path enlarging unit 210 is formed by notching the end of the blade base 121b positioned forward in the rotational direction during normal rotation (rotation in the direction of arrow X (braking state)). It is formed in a groove shape.
In addition, although the flow path expansion part 210 was formed in groove shape, it is not limited to this, You may form in hole shape.

Further, the control valve 50a is the same as that of the comparative example of FIG. 16, and the “flow passage expanding portion 54” (see FIG. 16) of the control valve 50 according to the first embodiment described above with reference to FIGS. 11) is omitted.
In the description of the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals with “b” added, and the description thereof is omitted.
First, when the rotor 30b is rotated in the forward rotation (rotation in the arrow X direction) direction, as shown in FIG. 20, an open / close channel 130b (not shown) is provided between the blade piece 120b of the rotor 30b and the control valve 50a. Does not occur.

For this reason, when the rotor 30b rotates in the forward rotation (rotation in the arrow X direction) direction, the braking torque increases and a braking action occurs.
On the other hand, when the rotor 30b is rotated in the reverse direction (rotation in the arrow Y direction), as shown in FIG. 19, the control valve 50a is in the normal rotation (rotation in the arrow X direction) direction with respect to the blade piece 120b of the rotor 30b. The open / close flow path 130b is generated by sliding to.

When the open / close channel 130b is generated, although not shown, the viscous fluid flows out from the channel expansion unit 210 through the open / close channel 130b.
For this reason, when the rotor 30b is rotated in the reverse direction (rotation in the direction of arrow Y), the braking torque is reduced and the braking action is lost.
(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 22, the present embodiment is characterized in that a flow passage expanding portion 220 is provided in the rotor main body 90c of the rotor 30c.
That is, as shown in FIG. 22, the blade piece 120c of the rotor 30c omits the blade base 121 (see FIG. 7) according to the first embodiment described above with reference to FIGS. The blade protrusion 122 is formed in a shape protruding directly from the outer periphery of the rotor body 90c of FIG.

As shown in FIGS. 21 to 22, the flow path enlargement unit 220 is positioned forward in the rotation direction when the blade piece 120 c is rotated forward (rotation in the arrow X direction (braking state)), and the outer periphery of the rotor body 90 c. The surface is cut into a U-shaped cross section to form a groove.
In the description of this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals with “c” added, and the description thereof is omitted.

First, when the rotor 30c is rotated in the forward direction (rotation in the direction of the arrow X), although not shown, the control valve 50c comes into close contact with the blade piece 120c, and an open / close channel 130c (not shown) is not generated between the two. .
For this reason, when the rotor 30c rotates in the forward rotation (rotation in the arrow X direction) direction, the braking torque increases and a braking action occurs.
On the other hand, when the rotor 30c is rotated in the reverse direction (rotation in the arrow Y direction), as shown in FIG. 21, the control valve 50c is in the normal rotation (rotation in the arrow X direction) direction with respect to the blade piece 120c of the rotor 30c. The open / close flow path 130c is generated by sliding to.

When the open / close channel 130c is generated, the viscous fluid flows out of the channel expansion unit 220 through the open / close channel 130c.
For this reason, when the rotor 30c is rotated in the reverse direction (rotation in the arrow Y direction), the braking torque is reduced and the braking action is lost.

An example of the first embodiment of the present invention is shown, which illustrates a state in which braking torque is not generated, and is an explanatory diagram for explaining the flow of viscous fluid. It is a disassembled perspective view of a damper. It is a longitudinal cross-sectional view of a damper. It is a cross-sectional view of a damper. It is a side view of a rotor. It is a bottom view of a rotor. It is sectional drawing which follows the AA line of FIG. It is the side view which notched a part of control valve. FIG. 9 is a bottom view of the control valve in FIG. It is sectional drawing which follows the BB line of FIG. It is a perspective view of a control valve. FIG. 6 is a diagram for explaining the state of generation of braking torque corresponding to FIG. 1 and for explaining the flow of viscous fluid. FIG. 5 is an explanatory diagram for explaining a relationship between a rotor blade piece and a control valve, illustrating a state where braking torque is not generated. FIG. 14 is a partially enlarged view of FIG. 13. The comparative example of embodiment of this invention is shown, The figure respond | corresponds to FIG. 13, and is explanatory drawing for demonstrating the relationship between the blade piece of the rotor which concerns on a comparative example, and a control valve. FIG. 12 is a perspective view of a control valve according to a comparative example corresponding to FIG. 11. FIG. 17 is a partially enlarged view of FIG. 16 corresponding to FIG. 14. An example of the 2nd embodiment of the present invention is shown, and the figure is a perspective view of a control valve. An example of the third embodiment of the present invention is shown, and this figure is for explaining the non-occurrence of braking torque, and is an explanatory diagram for explaining the relationship between rotor blades and control valves. is there. Corresponding to FIG. 19, this figure is an explanatory diagram for explaining the state of occurrence of braking torque. An example of the fourth embodiment of the present invention is shown, which is an explanatory diagram for explaining a flow of viscous fluid, for explaining a non-generating state of braking torque. An example of the 4th embodiment of the present invention is shown, and the figure is a sectional view of a rotor.

(First embodiment)
10 Damper
20 Housing 30 Rotor
40 viscous fluid
50 Control valve
51 Front wall 52 Rear wall
53 Opening 54 Flow channel expansion
55 Inside surface of the front wall 56 Sliding surface of the front wall
60 Housing body
61 Open face 62 Bottom wall
63 Rotation restriction wall 64 Shaft groove
65 Shaft protrusion
70 cap
71 Through hole
80 O-ring
90 Rotor body
91 Projection shaft 92 Recess
100 rotor transmission shaft
110 Rotor flange
120 rotor wings
121 Wing base 122 Wing projection
123 Blade side passage 124 Blade base slope
125 Plane of the wing base
130 Open / close flow path between rotor body and control valve (second embodiment)
200 Hole-shaped channel enlargement (third embodiment)
210 Enlarged flow path of blade base (fourth embodiment)
210 Rotor body flow path enlargement

Claims (6)

A housing;
A rotor having a rotor body rotatably accommodated in the housing, and a transmission shaft protruding from the rotor body toward the outside of the housing;
A viscous fluid filled in the housing;
Arranged between the housing and the rotor body, and closing the open / close flow path through which the viscous fluid can pass during forward rotation in one direction of the rotor;
In a damper comprising a control valve for opening the open / close channel during reverse rotation,
In the rotor body,
A winglet extending radially and covered by the control valve;
The control valve includes
Positioned in the forward direction of rotation at the time of forward rotation and abutting the blade piece to close the open / close flow path, and by being pushed by the viscous fluid at the time of reverse rotation and moving in the forward rotation direction, A front wall for opening the open / close channel;
A rear wall located behind the rotational direction during forward rotation;
An opening formed in the rear wall and communicating with the wing-side flow path;
Between the rotor body and the front wall,
Providing a flow path expanding portion for expanding the downstream outlet of the viscous fluid passing through the open / close flow path ;
The flow path enlarged portion is
Formed by notching a part of the end of the front wall,
The flow path enlarged portion is
A damper having a groove shape. A housing;
  A rotor having a rotor body rotatably accommodated in the housing, and a transmission shaft protruding from the rotor body toward the outside of the housing;
  A viscous fluid filled in the housing;
  Arranged between the housing and the rotor body, and closing the open / close flow path through which the viscous fluid can pass during forward rotation in one direction of the rotor;
  In a damper comprising a control valve for opening the open / close channel during reverse rotation,
  In the rotor body,
  A winglet extending radially and covered by the control valve;
  The control valve includes
  Positioned in the forward direction of rotation at the time of forward rotation and abutting the blade piece to close the open / close flow path, and by being pushed by the viscous fluid at the time of reverse rotation and moving in the forward rotation direction, A front wall for opening the open / close channel;
  A rear wall located behind the rotational direction during forward rotation;
  An opening formed in the rear wall and communicating with the wing-side flow path;
  Between the rotor body and the front wall,
  Providing a flow path expanding portion for expanding the downstream outlet of the viscous fluid passing through the open / close flow path;
The flow path enlarged portion is
  Formed by notching a part of the end of the front wall,
In the wing piece,
  A blade base that cooperates with the control valve to prevent passage of the viscous fluid;
  Extending radially from the blade base, spaced apart in the axial direction of the rotor body, and at least a pair of blade projections;
  A wing-side flow path that is formed within the interval between the wing protrusions and through which the viscous fluid can pass,
  In the wing base,
  An inclined slope,
  A plane extending from the inclined lower end of the inclined surface in a tangential direction of the rotor body, and having a leading end portion,
  In the front wall,
  An inner surface facing the slope and inclined parallel to the slope;
  Slidably contacting the plane, and a slidable contact surface parallel to the plane,
  The flow path enlarged portion is
  A damper that extends in a lateral direction from the inner surface to the front in the rotational direction during the forward rotation in parallel with the plane. A housing;
  A rotor having a rotor body rotatably accommodated in the housing, and a transmission shaft protruding from the rotor body toward the outside of the housing;
  A viscous fluid filled in the housing;
  Arranged between the housing and the rotor body, and closing the open / close flow path through which the viscous fluid can pass during forward rotation in one direction of the rotor;
  In a damper comprising a control valve for opening the open / close channel during reverse rotation,
  In the rotor body,
  A winglet extending radially and covered by the control valve;
  The control valve includes
  Positioned in the forward direction of rotation at the time of forward rotation and abutting the blade piece to close the open / close flow path, and by being pushed by the viscous fluid at the time of reverse rotation and moving in the forward rotation direction, A front wall for opening the open / close channel;
  A rear wall located behind the rotational direction during forward rotation;
  An opening formed in the rear wall and communicating with the wing-side flow path;
  Between the rotor body and the front wall,
  Providing a flow path expanding portion for expanding the downstream outlet of the viscous fluid passing through the open / close flow path;
The flow path enlarged portion is
  A damper formed by cutting out a part of the rotor body. The damper according to any one of claims 1 to 3,
In the wing piece,
A blade base that cooperates with the control valve to prevent passage of the viscous fluid;
Extending radially from the blade base, spaced apart in the axial direction of the rotor body, and at least a pair of blade projections;
A wing-side flow path that is formed within the interval between the wing protrusions and through which the viscous fluid can pass,
The flow path enlarged portion is
A damper formed by cutting out a part of the blade base. The damper according to claim 2 or claim 3 , wherein
The flow path enlarged portion is
A damper having a groove shape. The damper according to claim 2 or claim 3 , wherein
The flow path enlarged portion is
A damper characterized by being formed in a hole shape.

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