JP2894583B2 - High torque damper with movable valve protection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-torque damper exhibiting a high-torque damping action, and more particularly to a movable valve protection mechanism for preventing deformation of a movable valve.
And a high-torque damper .

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No.
No. 2,820,039. As shown in FIG. 5, this high-torque damper has a casing (3) having a cylindrical chamber (1) filled with a viscous fluid (2).
If is relatively rotatably combined to said casing (3), the chamber and the rotating member (5) having mainly a rotatable shaft portion (4) in (1), said rotary member (5 ) a lockable with the shaft portion (the shaft vane (6) in the axial direction provided in 4) with play in the rotational direction of, and the outer peripheral surface can rotate while sliding on the wall surface of the chamber (1) A movable valve (7), and a plurality of fluid passages (8, 9, 10) having different cross-sectional areas in order to change resistance according to the direction of relative rotation. ) Is provided at the contact portion.

[0003] The casing (3) and the rotating member (5) rotate relatively, whereby the movable valve (7) also rotates in the viscous fluid (2) and changes its position. The
Yes valve operating (7) is lockable with play in the direction of rotation axis blades (6), the axial blades (6) and the movable valve (7) different fluid passage cross-sectional areas in the (8,9, 10) is formed, so that changing the resistance in accordance with the direction of rotation.

[0004] For this reason, there is almost no resistance to rotation in one direction, and a large resistance is produced only in rotation in the reverse direction and only in rotation in the direction of the small passage (8). The resistance in the rotation toward the small passage (8) generates an extremely high torque because the movable valve (7) and the shaft blade (6) are in contact with each other and there is no gap.

That is, the smaller the size of the hole in the small passage (8), the larger the torque can be obtained. By changing the size of the hole, the rotational torque can be freely changed.

However, the movable valve (7) is made of a synthetic resin material and is weak. Therefore, FIG.
(A), the rotating member (5) has a small passage (8).
Rotation on the side (left rotation), the angle a vertical wall having a small passage (8) of the movable valve (7) (7a) is interposed between the shaft vanes (6) and Ke pacing blades (12), Extreme compression causes damage, and reverse rotation (clockwise rotation) as shown in FIG. 5B causes the small passage angle (7
In a), the state is extended.

Further, when the rotating member (5) is rotated counterclockwise, as shown in FIG. 5 (C), the shaft blade (6) gets over the movable valve (7) and comes off. When the rotating member (5) is rotated clockwise as shown in (D) and the movable valve (7) is rotated until the movable valve (7) collides with the casing blade (3a), the small passage angle (7a) is deformed and serves as a damper. Disadvantageously that the function is lost.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended to prevent the movable valve (7) from being damaged and losing a damper function. It is an object to provide a mechanism.

[0009]

In order to solve the above problems SUMMARY OF THE INVENTION The present invention has a viscous fluid (2) therein, the cylindrical case and having Luque pacing vanes projecting from the inner wall inwardly (12) and (3) disposed inside the casing
Relatively rotatably mounted rotary member (5) relative to the casing have axial section (4) (3), the shaft portion
(4) projecting outward and extending in the axial direction,
At least one shaft vane with a notched passage (10) in it
(6), and is attached to the shaft blade (6) with play in the rotational direction, and has a substantially U-shaped cross-section, and is provided with one of the opposed vertical walls.
A passage that can communicate with the notched passage (10) of the shaft blade
And (9) a movable valve (7) made of synthetic resin , wherein the casing blade (12) is connected to the rotating member (5).
Sliding contact with the outer peripheral surface of the shaft portion (4) of
(7) is in sliding contact with the inner peripheral surface of the casing (3).
Thus, these casing blade (12) and movable valve (7)
Casing interior is divided into a plurality of chambers by the times
According to the rotation direction of the rolling member (5), the passage (9) is
The movable valve (7) communicates with the notch passage (10).
Therefore, a high-torque damper that allows communication between the partitioned chambers
There are, protector protruding to the left and right sides of front Symbol axis blades (6) to (4a, 4b) formed integrally on the shaft portion (4), the protector (4a, 4b) by the movable valve
A high torque damper provided with the protection mechanism of (7).

[0010]

When the rotating member (5) is rotated in a direction of high torque as shown in FIG. 3, that is, when the rotating member (5) is rotated counterclockwise, the casing blade (12) and the protector (4) of the rotating member (5) are rotated.
a) collide with each other to prevent further rotation, and the small passage angle (7) between the casing blade (12) and the movable valve (7).
Collision with a) is avoided, and each angle of the movable valve (7) is protected without being caught between them.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. FIG. 1 is an exploded perspective view of a high-torque damper according to the present invention, and the same members as those described in the conventional example will be described using the same reference numerals.

In FIG. 1, a casing (3) has a hollow cylindrical chamber (1), and a mounting flange (13) is provided at one end thereof. ) Is screwed. (15) is the closing lid (14)
Is a bearing recess formed at the center.

The rotating member (5) is rotatably mounted on the casing (3) and serves as a member corresponding to the input shaft. The tip (16) of the central shaft (4) has the bearing recess (15). ). The inner wall (1) of the chamber (1)
A viscous fluid (2) called torque grease is filled between the shaft (7) and the shaft (4). (11) is a sealing means such as an O-ring. The casing (3) is formed with a casing blade (12) that protrudes inward and has a function as a stopper for restricting rotation of the rotating member (5).

The shaft portion (4) is provided with a shaft blade (6) protruding in the axial direction, and an appropriate portion thereof is provided with a position relative to a movable valve (7), which will be described later, and a rotation direction. A notch passage (10) for determining the amount of the viscous fluid (2) passing is formed.

The movable valve (7) is made of a synthetic resin material and has a U-shaped cross section. The large passage angle (7b), which is a left and right vertical wall, is formed with a large passage (9) that is largely cut out in a rectangular shape, and the other small passage angle (7b) is formed.
In a), a small passage (8) composed of a small hole is formed.

The movable valve (7) is disposed so as to straddle the shaft blade (6).

As shown in detail in the drawing, a pair of protectors (4a, 4b) extending in the axial direction and projecting around the shaft blade (6) are integrally formed on the shaft (4). Have been.

In FIG. 2, when the rotating member (5) is rotated counterclockwise, that is, when it is rotated toward the small passage (8),
Viscous fluid (2) having a flow rate restricted by said small passage (8)
Only passes, the rotating member (5) experiences a large resistance to its rotation and requires a high torque for its rotation.

(20) is a ring-shaped bearing member for bearing the other end of the rotating member (5).

The present invention is constructed as described above. When the rotating member (5) is rotated in the direction of high torque as shown in FIG. And protector (4a) for rotating member (5)
And further rotation is prevented, the collision between the casing blade (12) and the small passage angle (7a) of the movable valve (7) is avoided, and the movable valve (7) is not caught between them. Each angle is protected.

FIG. 4 shows another embodiment,
Two sets of shaft blades (6) and movable valves (7) are provided, and protectors (4a, 4b) are provided on both sides of each shaft blade (6). Therefore, the torque can be increased to twice that of the embodiment shown in FIG. 1, and the rotation angle can be reduced to half.

In the above embodiment, an example is shown in which the shaft blade (6) is provided on the rotating member (5) side. Conversely, the shaft blade (6) is provided on the inner wall surface of the casing (3). 17), for example, provided as a casing blade (12), a movable valve (7) is straddled over the casing blade (12), and the inner surface thereof is slidably contacted with the shaft (4) of the rotating member (5). May be.

[0023]

As described above, according to the present invention, a pair of protectors extending in the axial direction and protruding on both sides of the shaft blade are integrally formed on the rotating member so as to be located outside the movable valve. Therefore, the angle of the movable valve is not sandwiched between the casing blade and the shaft blade, and the movable valve is completely protected without being damaged.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a high-torque damper according to the present invention.

FIG. 2 is a schematic sectional view of a damper according to the present invention.

FIG. 3 is a schematic sectional view of the damper in a state where the damper is rotated from the state of FIG. 2;

FIG. 4 is a schematic sectional view of a damper showing another embodiment according to the present invention.

FIG. 5 is a schematic sectional view of a conventional damper.

[Sign]

 Reference Signs List 1 chamber 2 viscous fluid 3 casing 4 shaft 4a protector 4b protector 5 rotating member 6 shaft blade 7 movable valve 8 small passage 9 large passage 10 notch passage 11 sealing means 12 casing blade

Claims (2)

(57) [Claims] 1. A has a viscous fluid (2) in the interior, a cylindrical shape having a Luque pacing vanes projecting from the inner wall <br/> inwardly (12)
And a casing (3) disposed inside the casing.
Relatively rotatably mounted rotary member (5) relative to the casing have axial portion (4) to (3), the
Projecting outward from the shaft (4) and extending in the axial direction,
At least one shaft with a notched passage (10) at the end
The blade (6), also play in the rotational direction of the shaft wings (6)
With a cross section of approximately U-shape and opposed vertical walls
Can communicate with one of the shaft blade notch passages (10).
A movable valve (7) made of synthetic resin provided with a passage (9) , wherein the casing blade (12) is a shaft of the rotating member (5).
The movable valve (7) is in sliding contact with the outer peripheral surface of the portion (4).
Is in sliding contact with the inner peripheral surface of the casing (3).
The casing blade (12) and the movable valve (7)
The interior of the casing is partitioned into a plurality of chambers, and the passage is formed in accordance with the rotation direction of the rotating member (5).
(9) communicates with the notched passage (10), and
High torque for communication between chambers separated by valve (7)
A use dampers, protector protruding to the left and right sides of front Symbol axis blades (6) (4
a, integrally forming a 4b) to the shaft portion (4), the flop
Protection of the movable valve (7) by protectors (4a, 4b)
A high torque damper characterized by having a mechanism. 2. A pre-Symbol movable valve (7) and the protector (4a, 4b) the shaft vanes with a (6) is high according to claim 1, characterized in that provided at two or more locations
Damper for torque.