JPH07197970A - Rocking type damper - Google Patents

Abstract

PURPOSE:To provide the rocking type damper which enables torque which is generated when a damper is in operation, to be finely adjusted with ease, and moreover allows the damper to be simple in structure. CONSTITUTION:In the inner space of the cylindrical body 2 of a rocking type damper, a projected section 21 having a first and a second side surface 22 and 23, is provided, and a roking vane 7 capable of rocking fluid within a viscous fluid existing area 8 is rotatably supported. When the rocking vane 7 starts rocking countercloskwise starting from the first side surface 22, since viscous fluid in an area 8a enclosed by the second surface 23, the vane 7a and the inner surface of the cylindrical body 2, is increased in pressure, torque is thereby generated. On the other hand, viscous fluid within an area 8b enclosed by the first side surface 22, the vane 7a and the inner surface of the cylindrical body 2 is decreased in pressure. In this place, when the cross sectional area of a passage 9 communicating the first side surface 22 with the second side surface 23 is changed by a valve body 9, fluid within the area 8a is moved into the area 8b in response to change in pressure, and pressure in the area 8a is thereby changes, so that torque to be generated can thereby be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating damper which produces torque by oscillating blades oscillating in a viscous fluid region provided in a cylindrical body.

[0002]

2. Description of the Related Art Conventionally, as a damper capable of adjusting generated torque, a rotary damper utilizing shear resistance has been known as disclosed in Japanese Patent Publication No. 3-68250. That is, the rotary damper shown in FIG. 14 is a viscous fluid existing in the gap between the plurality of movable cylinders 105 that rotate inside the casing 101 by the rotational force applied to the rotating arm 103 and the plurality of fixed cylinders 106 that do not rotate. Torque is generated by utilizing the shear resistance of. These cylinders 105, 10
No. 6 has a slit (not shown) along the axial direction, so that the movable cylinder 105 is along the slide groove 102e provided in the movable shaft 102, and the fixed cylinder 106 is for slide provided in the casing 101. The diameter can be expanded / contracted in the radial direction along the concave groove 101e. A shaft cylinder 108 is provided at the axial center of each of the cylinders 105 and 106, and the shaft cylinder 108 includes an adjusting shaft 108a and a pair of half cylinders 108.
c and a pair of arms 108b. When the adjustment knob 109b is rotated, the adjustment shaft 108a is rotated to draw the half-split cylinder 108c toward the shaft center side to reduce the diameter of the shaft cylinder 108, or conversely, it is separated from the shaft center to increase the diameter of the shaft cylinder 108. You can

When the diameter of the shaft cylinder 108 is increased, the diameters of the movable cylinder 105 and the fixed cylinder 106 are expanded, the distance between them is narrowed, and the shear resistance of the viscous fluid increases. Therefore, the generated torque becomes large. On the other hand, when the diameter of the shaft cylinder 108 is reduced, the movable cylinder 105 and the fixed cylinder 106 are reduced in diameter,
The space between them expands, and the shear resistance of the viscous fluid decreases.
Therefore, the generated torque becomes small.

[0004]

However, the rotary damper described above has a drawback in that the structure of the shaft cylinder 108, the movable cylinder 105, the fixed cylinder 106 and the like must be complicated in order to change the generated torque. .

The movable cylinder 1 of the rotary damper described above.
05 and the fixed cylinder 106 are expanded and reduced in diameter, it is a prerequisite that the shear resistance of the viscous fluid is evenly distributed. In order to evenly distribute the shear resistance, the movable cylinder 105 continues to rotate. Is the premise. Therefore, when the rotary damper is used in a place where the rotation angle is regulated, such as a door opening / closing unit, the shear resistance is not sufficiently divided and the movable cylinder 105 and the fixed cylinder 106 are sufficiently expanded. Diameter /
Since the diameter was not reduced, the desired variable range could not be obtained.

Further, in the rotary damper described above, when the movable cylinder 105 continues to rotate, a large shearing resistance is generated, so that a large torque can be obtained.
There is a drawback in that sufficient torque cannot be obtained when the rotation angle is restricted.

On the other hand, the oscillating damper does not utilize the shear resistance but generates a torque by pressing the viscous fluid existing between the oscillating blade and the regulating member. Therefore, the generated torque is generally large. However, since there is no known mechanism for adjusting the torque generated by the oscillating damper, in order to adjust the torque generated, for example, work such as exchanging with a viscous fluid having a different viscosity has been performed. Such a method has a drawback that it is difficult to use an oscillating damper even if high torque is required, because delicate adjustment cannot be performed. For example, when it is used for an opening / closing unit such as a door, it is impossible to adjust with a damper even if the opening / closing force varies among the opening / closing units.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an oscillating damper having a simple structure in which fine adjustment of generated torque can be easily performed when the damper is used. To do.

[0009]

In order to solve the above problems, an oscillating damper according to the present invention is provided in a cylindrical body formed by closing the upper and lower surfaces of a cylinder, and inside the cylindrical body. And a first restricting surface having a plane formed by the radial direction and the axial direction of the tubular body, and a plane provided inside the tubular body and formed by the radial direction and the axial direction of the tubular body. And a viscous fluid in a region surrounded by a second regulation surface different from the first regulation surface, the inner surface of the tubular body, the first regulation surface and the second regulation surface. A viscous fluid existence region, a swinging blade pivotally supported by the cylindrical body so as to be capable of swinging in the viscous fluid existence region around the axis of the cylindrical body, and provided outside the viscous fluid existence region. , The first regulation surface side and the second regulation surface side of the viscous fluid existing region And the viscous fluid passage for passing, provided in the viscous fluid passage, characterized in that an adjusting mechanism for changing the flow resistance of the passage.

[0010]

The swing type damper of the present invention having the above structure is
For example, when the pressure of the viscous fluid existing in the region surrounded by the oscillating blade, the first restricting surface and the inner surface of the tubular body is increased by the oscillating of the oscillating blade toward the first restricting surface, the pressure is increased. Torque is generated depending on On the other hand, at this time, the pressure of the viscous fluid existing in the region surrounded by the swinging blade, the second restricting surface, and the inner surface of the tubular body is reduced. The viscous fluid passage communicates with the first regulation surface side that is increased in pressure and the second regulation surface side that is reduced in pressure. If the flow resistance of the viscous fluid passage is increased, the pressure of the viscous fluid is maintained high, so that the generated torque is large, and as the flow resistance is decreased, the pressure of the viscous fluid is reduced, and thus the generated torque becomes small.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of the first embodiment.
2 is a sectional view taken along line AA of FIG. Further, FIGS. 3 to 9 are explanatory views of the respective parts constituting the first embodiment, and FIG. 10 is an explanatory view showing the operation.

As shown in FIG. 1, the swingable damper 1 of the first embodiment has a cylindrical body 2, an upper cap 3 for covering the upper surface of the cylindrical body 2, a lower cap 4 for covering the lower surface, and an upper and lower cap 3. , 4 for covering the upper and lower bearings, and a swinging blade 7 capable of swinging about the axis of the cylindrical body 2.

3A and 3B are explanatory views of the cylindrical body 2. FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a bottom view. still,
Since the plan view and the bottom view are line symmetrical, only one side thereof is shown. Further, in the front view, the center line is shown as a broken line. As shown in FIGS. 1 to 3, on the inner peripheral surface of the cylindrical body 2,
A projection 21 having a substantially fan-shaped cross section is integrally formed along the axial direction. The protruding portion 21 has a first side surface 22 formed by the radial direction and the axial direction, and a second side surface 23 also formed by the radial direction and the axial direction. An area surrounded by the inner surface of the cylindrical body 2, the first side surface 22 and the second side surface 23 is a viscous fluid existence area 8 (see FIG. 2),
Filled with viscous fluid. The first side surface 22 corresponds to the first restriction surface of the present invention, and the second side surface 23 corresponds to the second restriction surface. A circular arc-shaped groove 24 is formed above the protrusion 21.
The side surface 22 and the second side surface 23 are provided so as to communicate with each other. The passage 9 formed by the groove 24 and the bottom surface of the upper cap 3 corresponds to the viscous fluid passage of the present invention. A hole 25 for holding the valve body is provided in a substantially vertical direction near the center of the arc-shaped groove 24. A recess 26a and eight bolt holes 27 are provided on the upper surface of the cylindrical body 2, and similar recesses 26b and bolt holes 28 are provided on the lower surface. In addition, the cylindrical body 2 of the present embodiment and the later-described upper cap 3 and lower cap 4 correspond to the tubular body of the present invention.

FIG. 4 is an explanatory view of the upper cap, (a).
Is a plan view, (b) is a front view, and (c) is a bottom view.
Since the plan view and the bottom view are line-symmetrical, only one side thereof is shown. Further, in the front view, the center line is shown as a broken line. As shown in FIGS. 1 and 4, the upper cap 3 is formed in a ring shape and has a recess 26 a provided on the upper surface of the cylindrical body 2.
It is fitted in via the O-ring 11a. In addition to the central hole 31, the upper cap 3 is provided with eight bolt insertion holes 32 along the outer circumference. Also, the upper cap 3
Is provided with a screw hole 33 at a position facing the valve body holding hole 25 provided in the cylindrical body 2. This screw hole 33
Is screwed with an adjusting screw 95 described later.

FIG. 5 is an explanatory view of the upper bearing stopper,
(A) is a plan view of an upper bearing stopper, (b) is a front view thereof, (c) is a front view of an upper retaining ring, and (d) is a bottom view thereof. Since the plan view and the bottom view are line-symmetrical, only one side thereof is shown. Further, in the front view, the center line is shown as a broken line.

The upper bearing stopper 5 is shown in FIGS.
As shown in (a) and (b), it is formed in a ring shape, and in addition to the central hole 51, eight bolt insertion holes 52 are provided along the outer periphery. Further, a through hole 53 is provided at a position opposed to the valve body holding hole 25 provided in the cylindrical body 2 and the screw hole 33 provided in the upper cap 3. The upper bearing stopper 5 is fixed to the cylindrical body 2 together with the upper cap 3 by the bolts 12 inserted into the bolt insertion holes 52 and 32. Further, the upper bearing stopper 5 plays a role of fixing the upper bearing 13 arranged in the central hole 31 of the upper cap 3. As shown in FIGS. 1 and 5 (c) and 5 (d), the upper retaining ring 5a is inserted into a swinging blade 7 which will be described later, and also serves to fix the upper bearing 13.

FIG. 6 is an explanatory view of the lower cap, (a).
Is a plan view, (b) is a front view, and (c) is a bottom view.
Since the plan view and the bottom view are line-symmetrical, only one side thereof is shown. Further, in the front view, the center line is shown as a broken line. As shown in FIGS. 1 and 6, the lower cap 4 is fitted in a recess 26b provided in the lower surface of the cylindrical body 2 via an O-ring 11b. In addition to the central hole 41, the lower cap 4 is provided with eight bolt insertion holes 42 along the outer circumference.

FIG. 7 is an explanatory view of the lower bearing stopper.
(A) is a plan view of a lower bearing stopper, (b) is a front view thereof, (c) is a front view of a lower retaining ring, and (d) is a bottom view thereof. Since the plan view and the bottom view are line-symmetrical, only one side thereof is shown. Further, in the front view, the center line is shown as a broken line.

The lower bearing stop 6 is shown in FIGS.
As shown in (a) and (b), in addition to the central hole 61, eight bolt insertion holes 62 are provided. Lower bearing stopper 6
Are fixed to the cylindrical body 2 together with the lower cap 4 by bolts 14. Further, the lower bearing stopper 6 plays a role of fixing the lower bearing 15 arranged in the central hole 41 of the lower cap 4. The lower retaining ring 6a is
As shown in FIGS. 1 and 7 (c) and (d), the lower bearing 15 is inserted into a swinging blade 7 described later and also serves to fix the lower bearing 15.

8A and 8B are explanatory views of the oscillating blade. FIG. 8A is a plan view, FIG. 8B is a front view, FIG. 8C is a front view, and FIG. Since the plan view and the bottom view are line-symmetrical, only one side thereof is shown. The front view is omitted in the middle. As shown in FIGS. 1, 2 and 8, the oscillating blade 7 has its shaft 7b arranged at the axial center position of the cylindrical body 2, and has an upper cap 3, an upper bearing stopper 5, a lower cap 4, and a lower bearing. Upper bearing 1 with stopper 6
3, the lower bearing 15 and the like are swingably supported. The swing blade 7 is supported by the upper cap 3 and the lower cap 4 via V-rings 16 and 17, respectively. The blade 7a of the swinging blade 7 has a substantially rectangular shape, and the swinging range of the blade 7a is within the viscous fluid existence region 8. Although the number of blades 7a is one in this embodiment, a plurality of blades may be provided, in which case the generated torque is further increased.

9A and 9B are explanatory views of the valve body. FIG. 9A is a plan view and FIG. 9B is a bottom view. As shown in FIGS. 1, 2, and 9, the valve body 91 is composed of a first cylindrical portion 92, a second cylindrical portion 93, and a taper portion 94 connecting both cylindrical portions. The diameter of the first cylindrical portion 92 is larger than that of the second cylindrical portion 93, and is substantially the same as the diameter of the valve body insertion hole 25 provided in the cylindrical body 2. An adjusting screw 95 is attached to the upper surface of the first cylindrical portion 92. As shown in Figure 1,
The valve body 91 is arranged in the hole 25 for inserting the valve body, and the second cylindrical portion 93 is inserted in the spring 96. The valve body 91 is biased upward by the spring 96.
Further, the first cylindrical portion 92 slidably contacts the screw hole 33 provided in the upper cap 3 via the O-ring 19. The valve body 91 is positioned through an adjusting screw 95 by an external operation.

Next, the operation of the oscillating damper 1 of this embodiment will be described. 10A and 10B are explanatory views showing the operation of the oscillating damper, FIG. 10A is an explanatory view when the generated torque is maximized, and FIGS. 10B and 10C are explanations showing one process during adjustment of the generated torque. It is a figure. For convenience, the valve body 91 is shown by a dashed line.

When the adjusting screw 95 is tightened by an external operation, the valve element 91 is positioned at the position shown in FIG. 10A against the biasing force of the spring 96. That is, in this state, the passage 9 is blocked by the first cylindrical portion 92 of the valve body 91. When the swinging blade 7 starts swinging counterclockwise from the first side surface 22 in FIG.
Since the viscous fluid in the region 8a surrounded by a and the inner surface of the cylindrical body 2 has an increased pressure, torque is generated. On the other hand, a region 8b surrounded by the first side surface 22, the blade 7a, and the inner surface of the cylindrical body 2
The pressure of the viscous fluid decreases. At this time, this area 8a
The viscous fluid therein cannot pass through the passage 9. Therefore, the maximum torque is generated in the swing damper 1.

When the adjusting screw 95 is loosened by an external operation, the spring 96 pushes the valve body 91 slightly upward. At this time, the valve body 91 is positioned at the position shown in FIG. That is, in this state, since the tapered portion 94 of the valve body 91 faces the passage 9, the passage 9 is slightly open.

When the oscillating blade 7 starts oscillating in the same manner as described above, the pressure of the viscous fluid in the area 8a increases to generate torque, while the pressure of the viscous fluid in the area 8b decreases (see FIG. 2). At this time, the viscous fluid in the region 8a can move to the region 8b side where the pressure is reduced by passing through the passage 9 which is slightly opened.
The pressure does not become higher than that in FIG. Therefore, a torque that is slightly smaller than the maximum torque can be obtained.

Although the valve body 91 is provided with the tapered portion 94, the cross-sectional area where the viscous fluid passes through the passage 9 can be finely adjusted by the vertical movement of the valve body 91.
If the adjusting screw 95 is further loosened by an external operation,
The spring 96 pushes the valve body 91 further upward. At this time, the valve body 91 is positioned at the position shown in FIG. That is, in this state, since the tapered portion 94 and the second cylindrical portion 93 of the valve body 91 face the passage 9, the passage 9 is considerably open.

When the oscillating blades 7 start oscillating in the same manner as described above, the pressure of the viscous fluid in the area 8a increases and torque is generated, while the pressure of the viscous fluid in the area 8b decreases (see FIG. 2). At this time, the viscous fluid in this region 8a can move to the region 8b side where the pressure is reduced by passing through the passage that is considerably open, and therefore FIG.
The pressure does not become higher than that in (b). Therefore, a torque considerably smaller than the maximum torque can be obtained.

The effects of this embodiment will be described below. By operating the adjusting screw 95 from the outside to position the valve element 91 in the vertical position, the cross-sectional area of the passage 9 can be slightly changed. Since the flow resistance of the viscous fluid passing through the passage 9 changes in accordance with the change in the cross-sectional area, the generated torque can be finely adjusted. A passage 9 as a viscous fluid passage in a normal rocking damper.
And the hole 25 for inserting the valve body, the valve body 91 and the adjusting screw 9
No. 5 is provided, and the structure is simple. Therefore, it is possible to obtain the effect that the size is almost the same as that of the normal swing-type damper and the possibility that a failure or the like occurs is extremely small.

Next, the use of the rocking damper 1 of this embodiment will be described. The oscillating damper 1 can be applied to a device that repeatedly operates within a predetermined angle range. That is,
The above effect can be obtained by attaching a moving member to the shaft 7b of the swinging blade 7. For example, a winding roll of a shutter that winds up / down at a predetermined position to stop it, an opening / closing mechanism such as a trunk or hood of a car, a door, a mechanical device that moves linearly (movement of a table of machine tools, air and oil cylinders). Control), a mechanical device that performs rotational movement (motion control of a joint of a robot or the like), and the like.

It is needless to say that the present invention is not limited to the above-mentioned embodiments and can be carried out in various modes without departing from the gist of the present invention. For example, in the above-described embodiment, the cylindrical main body of the present invention is provided with one set of the first regulation surface and the second regulation surface. However, as shown in FIGS. 11 and 12, for example, the first regulation surface 81 It is also possible to provide a plurality of sets of the second regulation surface 82 and the number of the blades 83 correspondingly. In this case, the viscous fluid passage 84 provided with the valve body 85 may communicate the first regulation surface 81 and the second regulation surface 82 of each set (see FIG. 11), but the first regulation surface of a certain set. 81 and the second restriction surface 82 of another set may be communicated with each other (see FIG. 12).

In the above embodiment, the adjusting mechanism is
I used a regulating valve that changes the cross-sectional area of the viscous fluid passage,
For example, the flow resistance may be changed by changing the length of the passage, changing the number of times the passage is bent, or changing the material of the inner surface of a part of the passage.

Further, as shown in FIG. 13, the viscous fluid passage 9 may be provided outside the cylindrical body 2, and an adjusting mechanism such as an adjusting valve may be provided in the middle thereof. In this case, the generated torque can be adjusted at a place apart from the damper by extending the viscous fluid passage 9.

[0033]

As described in detail above, according to the present invention,
It is possible to provide an oscillating damper having a simple structure in which fine adjustment of generated torque can be easily performed when the damper is used.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view of a cylindrical body, (a) is a plan view,
(B) is a front view and (c) is a bottom view.

FIG. 4 is an explanatory view of an upper cap, (a) is a plan view, (b) is a front view, and (c) is a bottom view.

5A and 5B are explanatory views of the upper bearing stopper, FIG. 5A is a plan view of the upper bearing stopper, and FIG.
(C) is a front view of the upper retaining ring, and (d) is a bottom view thereof.

6A and 6B are explanatory views of a lower cap, FIG. 6A is a plan view, FIG. 6B is a front view, and FIG. 6C is a bottom view.

FIG. 7 is an explanatory view of the lower bearing stopper, (a) is a plan view of the lower bearing stopper, and (b) is a front view thereof.
(C) is a front view of the lower retaining ring, and (d) is a bottom view thereof.

FIG. 8 is an explanatory view of the swinging blade, (a) is a plan view,
(B) is a front view, (c) is a front view, and (d) is a bottom view thereof.

FIG. 9 is an explanatory view of a valve body, (a) is a plan view,
(B) is a bottom view.

FIG. 10 is an explanatory view showing the operation of the swing damper, and FIG. 10 (a) is an explanatory view when the generated torque is maximized,
(B) And (c) is an explanatory view showing one process during adjustment of generated torque.

FIG. 11 is a cross-sectional view of another embodiment.

FIG. 12 is a sectional view of another embodiment.

FIG. 13 is a cross-sectional view of another embodiment.

FIG. 14 is a cross-sectional view of a conventional generated torque adjustment damper.

[Explanation of symbols]

1 ... Oscillating damper, 2 ... Cylindrical body, 3
... Upper cap, 4 ... Lower cap,
5 ... Upper bearing stopper, 5a ... Upper retaining ring, 6 ... Lower bearing stopper, 6a ... Lower retaining ring, 7 ... Oscillating blade, 7a ... Blade, 7b. ..Axes, 8 ... Viscous fluid existence region, 9 ... Passages, 22 ...
..First side surface, 23 ... Second side surface, 9
1 ... Valve body, 95 ... Adjusting screw, 96
···spring,

Claims (1)

[Claims] 1. A cylindrical main body formed by closing upper and lower surfaces of a cylinder, and a flat surface provided inside the cylindrical main body and formed by a radial direction and an axial direction of the cylindrical main body. 1 restriction surface, a second restriction surface different from the first restriction surface, the second restriction surface being provided inside the cylindrical main body and formed by the radial direction and the axial direction of the cylindrical main body; The inner surface of the cylindrical body, the area surrounded by the first restriction surface and the second restriction surface, and the viscous fluid existence area where the viscous fluid exists, and the viscous fluid existence around the axis of the cylindrical body. A swinging blade axially supported by the tubular body so as to be swingable in the region, and the first regulating surface side and the second regulating surface side of the viscous fluid existing region which are provided outside the viscous fluid existing region. And a viscous fluid passage that communicates with An oscillating damper having an adjusting mechanism for changing dynamic resistance.