JPH06659Y2 - Damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application of the present invention> The present invention relates to a damper that applies a resistance force to a rotational movement to allow it to rotate slowly, and is particularly small in size and provides a strong resistance force. Regarding the damper that can be.

<Prior Art> Conventionally, a damper utilizing viscous resistance of oil as shown in FIGS. 8 and 9 has been generally used as a mechanism for applying a braking force to a rotational motion to slowly rotate.

That is, in the figure, 1 is a cylindrical case with one surface open, 2 is a disk-shaped rotating body, 3 is a rotating shaft fixed to the center of the rotating body 2, and the rotating body 2 is inside the case 1. It is rotatably housed, and oil (grease) 4 is enclosed in a case 1 by a lid 5.

For this reason, even if a sudden turning force is applied to the rotating shaft 3, the oil is not formed between one surface of the disk-shaped rotating body 2 and the bottom surface of the case 1 and between the opposite surface of the rotating body 2 and the lid 5. The viscous resistance of No. 4 causes resistance torque, which limits rapid rotation and causes slow rotation.

However, in the damper shown in FIGS. 8 and 9, for example, in the case of a damper having a rotating shaft to which a large turning force is applied as in the case where a lid having a large weight rotates from the top to the bottom due to its own weight, the oil 4 Resistance torque due to viscous resistance is not enough. Therefore, in order to obtain a large resistance torque, the rotor 2
Since it is necessary to remarkably increase the diameter of the rotating shaft, that is, the rotating body 2 and the case 1 are largely projected in the direction perpendicular to the rotating shaft, that is, over the entire circumference in the radial direction. Direction to increase the size and support it with the rotating shaft damper of the rotating lid to attach it to the opening edge of the housing,
Since it protrudes with a large size over the entire circumference in the radial direction around the rotation axis, there is a drawback that it is difficult to mount and the damper mounting is restricted.

In such a damper, a sufficiently large resistance torque cannot be obtained only by viscous resistance of oil, so that the radius of the rotating body must be remarkably increased. -12706
In No. 5, in addition to the viscous resistance due to the oil of the rotating body fixed to the rotating shaft, a damper having a structure in which a coil spring is wound around the rotating shaft to add a torsional resistance force due to a coil spring or a mainspring, and an actual open shaft 62 -14383
No. 2 has a structure in which a cam and a coil spring are provided in the axial direction of the rotating shaft, the rotation of the rotating shaft is converted into an axial movement by the cam, and a compression resistance force of the coil spring is given to the axial movement. A damper is proposed.

<Problems to be solved by the present invention> However, in the conventional damper of Japanese Utility Model Laid-Open No. 61-73935, since the coil spring is wound around the rotating shaft, it does not protrude greatly in the radial direction. In addition, the shape is greatly protruded, and
Even in the damper of No. 27065, the rotating body largely projects to the outer circumference of the rotating shaft, and the mainspring also has a large projecting shape to the outer periphery of the rotating shaft. Although it is mounted on the opening edge of the housing while being supported by the rotating shaft damper, it protrudes with a large size over the entire circumference in the radial direction around the rotating shaft, which makes it difficult to mount and the damper mounting is restricted. There was a point.

Also, in the conventional damper of Japanese Utility Model No. 62-143832, only the resistance of the coil spring is used.
In order to use it as a damper to which a large turning force is applied, it is necessary to use a large-diameter coil spring with a large size. Therefore, the rotating shaft also has a large diameter, and the rotating shaft has a large diameter over the entire circumference in the radial direction. Since it has a large protruding shape, the entire damper is enlarged in the radial direction of the rotating shaft,
Although it is supported by the rotation axis damper of the rotation lid and attached to the opening edge of the housing, it protrudes with a large size over the entire circumference in the radial direction around the rotation axis, so it is difficult to attach and the damper attachment is restricted. There was a problem of receiving it. Also,
In order to obtain a large compressive resistance force, the axial length of the coil spring must be increased, which causes a problem in that the axial dimension of the damper also becomes large.

The present invention solves such a problem, and since the dimension is not large over the entire circumference in the radial direction around the rotation axis, it can be easily attached to the opening edge of the housing, and moreover,
It is an object of the present invention to provide a damper that can obtain a high resistance torque and has a small size in the rotation axis direction.

<Means for Solving the Problems> In order to solve the problems, in the damper of the present invention, the cylindrical first and second rotating body accommodating cylinder parts (21), whose axes are parallel to each other, ( 22) and a housing (20) integrally provided side by side with each other, and first and second cylinders in the first and second rotating body accommodating cylinder portions (21) and (22). The parts (60a) and (71) are rotatably housed, and the first and second gear parts (61) and (7) are meshed with each other.
4) The first and second rotating bodies (60) and (70), which rotate in mutually opposite directions by the axial directions and are parallel to each other, and cannot rotate in the first rotating body accommodating cylinder portion (21). The first rotating body (60) is housed so as to be slidable in the axial direction of the first rotating body accommodating tubular portion (21) and comes into contact with the axial tip end portion of the first cylindrical portion (60a). A rectilinear body that slides in the first rotating body accommodating cylinder part (21) in the axial direction in response to the rotation of the first rotating body accommodating cylinder part (21), A coil spring (40) for imparting a resistance force to the linear movement of the rotating body (60) in the axial direction of the rectilinear body, and the coil spring (40) is rotatable in the second rotating body accommodating cylinder part (22). The second rotary body (70) housed in the second rotary body (70) is interposed between the second rotary body housing tubular section (22) and the second rotary body housing tubular section (22). And a viscous resistance body that imparts a resistance force to the rotation of the second cylindrical portion (71), and is fixed to one of the first and second rotating body accommodating cylinder portions (21) and (22). With respect to the rotation of the external rotation shaft, the resistance force of the coil spring (40) in the first rotating body containing cylinder (21) and the viscosity of the second rotating body containing cylinder (22). It is characterized in that the resistance force by the resistor is applied at the same time.

Alternatively, the two axes may be coil springs.

<Operation> Due to this, when the external rotation shaft rotates, the first,
The first and second rotating bodies (60) and (70) rotate in opposite directions by the second gear parts (61) and (74), one of which is a coil spring (40) and the other of which is a viscous resistor. Resistance to rotation is given simultaneously.

Alternatively, a resistance force can be simultaneously applied to the two axes by a coil spring.

<Embodiment of the Invention> (FIGS. 1 to 7) Hereinafter, an embodiment of the invention will be described with reference to the drawings.

1 to 3 show a damper according to an embodiment of the present invention. FIG. 1 is an exploded perspective view thereof, FIG. 2 is a perspective view in an assembled state, and FIG. 3 is a sectional view thereof.

In these drawings, 10 is a damper, 20 is a housing thereof, and 80 is a cap fixed to one end of the housing 20.

As shown in FIGS. 1 and 4, the housing 20 includes cylindrical first and second rotary body accommodating cylinder portions that are integrally provided in parallel with each other and have their axes parallel to each other. 21 and a second tubular portion 22.

The first rotating body accommodating cylinder portion 21 has openings 23 and 24 at both ends, and the inner wall of the opening portion 24 on the right side receives the right end portion (in FIG. 1) of the coil spring 40 described later. The annular stopper 24a is projected.

Further, two guide grooves 21a, 21a for guiding a cylindrical cam 50 described later are provided in the axial direction from the left end of the first rotary body accommodating cylinder portion 21.

A mounting hole 25 is provided below the right end of the first rotating body accommodating cylinder portion 21.
A mounting plate 25 provided with a is projectingly provided in a direction of an extension line of the diameter of the first rotating body accommodating cylinder portion 21, and a second rotating body accommodating cylinder portion 22 is provided on the left side thereof.

The second rotating body accommodating cylinder portion 22 has an opening 26 only at the left end and a bottom portion 22a at the right end. From this bottom portion 22a, as shown in FIG.
7 is projected.

As shown in FIG. 4, the first rotary body accommodating tubular portion 21 and the second rotary body accommodating tubular portion 21
From the left end both sides of the boundary portion of the rotating body accommodating tubular portion 22,
8a and 28b are provided so as to project, and the second rotating body accommodating cylinder portion 2 is provided.
A projecting portion 29 is provided so as to project from the lower left side of 2.

These projecting portions 28a, 28b and 29 have the same projecting length, the projecting portions 28a, 28 on both sides are bilaterally symmetrical, and the inner peripheral wall 2 of the first rotating body accommodating tubular portion 21 is provided on the upper side thereof.
A peripheral wall surface 28 that is concentric with 1'and constitutes a part of a circumference of an inner diameter larger than the inner diameter of the inner peripheral wall 21 'by a predetermined length.
a ', 28b', and on the lower side thereof, the inner peripheral wall 2 is concentric with the inner peripheral wall 22 'of the second rotating body accommodating cylinder portion 22.
It has peripheral wall surfaces 28a "and 28b" forming a part of the circumference of the inner diameter larger than the inner diameter of 2'by a predetermined length.

Further, on the upper surface of the lower protrusion 29, the protrusion 28
It has a peripheral wall surface 29 'forming part of the same circumference as the lower peripheral wall surfaces 28a ", 28b" of a, 28b.

Further, fitting pins 30, 30, ... Are projectingly provided on both sides of the projecting portions 28a, 28b and the projecting portion 29.

The outer wall surfaces on both sides of these projecting portions 28a, 28b, 29 are flush with the outermost bulging portions of the first and second rotating body accommodating tubular portions 21, 22 in the horizontal direction. As shown in FIG. 1, the protruding portion 28a (28) is provided at the left end of the boundary portion between the first and second rotating body accommodating tubular portions 21, 22.
The depression 31 is formed by b).

As shown in FIG. 3, a coil spring 40 has a left end portion in a cylindrical cam 50 inside the first rotating body accommodating cylinder portion 21.
Of the first rotary body accommodating tubular portion 21 and the annular stopper 24a of the inner wall of the right end of the first rotating body accommodating tubular portion 21 is abutted against the right end surface 50a of the first rotary body accommodating portion 50a.

Further, a cylindrical cam (straight body) 50 is housed in the first rotating body housing cylinder portion 21 in a state where the coil spring 40 is compressed at its right end portion 50a.

The cylindrical cam 50 is a hollow cylindrical body that fits the first rotating body accommodating cylinder portion 21, and two guide projections 51, 51 in the axial direction are provided on the outer peripheral wall thereof so as to project. It is fitted into the two guide grooves 21a, 21a of the rotating body housing cylinder portion 21 and is slidably housed in the first rotating body housing cylinder portion 21 so as to move straight in the axial direction.

A notch 52 is provided at the left end of the cylindrical cam 50. A cam surface 52a is formed on one end side in the circumferential direction of the notch 52, and a vertical surface 52b is formed on the other end side.

Further, the right end portion 60 a of the drive rod 60 is rotatably accommodated in the first rotating body accommodating cylinder portion 21 while being pressed by the left end portion of the cylindrical cam 50.

The drive rod 60 has a hollow cylindrical shape, and a gear portion 61 is provided so as to project on the outer periphery of the intermediate portion.

The cylindrical cam 50 is provided at the right end portion 60a of the drive rod 60.
A notch 62 corresponding to the notch 52 is provided. A cam surface 62a is formed on one end side in the circumferential direction of the notch 62, and a vertical surface 62a is formed on the other end side.

Further, on the inner peripheral wall of the left end portion 60b of the drive rod 60, as shown in FIG. 3, a fitting protrusion 63 in the axial direction is projected.

This drive tod 60, as shown in FIGS. 3 and 5,
With the coil spring 40 compressed and in contact with the cylindrical cam 50, the cylindrical right end portion 60a is rotatably accommodated in the first rotating body accommodating cylinder portion 21, and the gear portion 61 is provided with the projecting portion 28a. A part is surrounded by the upper peripheral wall surfaces 28a 'and 28b' of 28b.

As shown in FIG. 3, the rotor 70 is rotatably housed in the second rotating body housing portion 22. That is, the rotor 7
The 0 cylindrical portion 71 is rotatably accommodated between the second rotating body accommodating tubular portion 22 and the inner tubular portion 27 thereof.

A viscous resistor, that is, oil (grease) having an appropriate viscosity is housed between the inner wall of the second rotating body accommodating cylinder portion 22 and the outer peripheral wall of the inner cylinder portion 27, and enclosed by the O-rings 72 and 73. Has been done.

The gear portion 6 of the drive rod 60 is provided at the left end of the rotor 70.
The gear part 74 for meshing with 1 is in contact.

As shown in FIGS. 3 and 5, the gear portion 74 has a part on the lower peripheral wall surfaces 28 ″, 28 ″ of the protruding portions 28 a and 28 b and the peripheral wall surface 29 ′ of the lower protruding portion 29. In the surrounded state, it meshes with the gear portion 61 of the drive rod 60 between the protrusions 28a and 28b on both sides.

Further, at the left end of the gear portion 74, as shown in FIG. 3, a shaft portion 75 is projected.

In the state of FIG. 5, the cap 80 is attached from the left as shown in FIG.

That is, the cap 80 is, as shown in FIG.
1 has a cylindrical portion 82 for rotatably accommodating the left end portion 60b of the drive rod 60, and the mounting plate 81 has a right end portion having the protruding portions 28a, 28 of the housing 20.
It has a box part 83 for accommodating b and 29.

The mounting plate 81 has a mounting hole 81a.

As shown in FIG. 3, an annular stopper 82a for receiving the left end portion 60b of the drive rod 60 is projectingly provided on the inner wall at the left end of the cylindrical portion 82.

On the right end upper inner wall 12 of the side plates 83a and 83b forming the box part 83, the recess 3 at the back of the protrusions 28a and 28b is formed.
Tapered locking projections 84 for locking to 1, 31
But it is projected.

Further, as shown in FIG. 3, the back plate 83c forming the box portion 83 has a shaft hole 85 into which the shaft portion 75 at the left end of the rotor 70 is rotatably fitted, and the housing 20 is provided. Four fitting pins 3 of the protrusions 28a, 28b, 29 of the
It has four small holes (not shown) into which 0, 30, ...

Therefore, as shown in FIG. 5, the drive rod 60 is strongly pushed rightward to compress the coil spring 40, and then the cap 80 is fitted from the left side as shown in FIG. At this time, the locking projections 84, 84 of the side plates 83a, 83b of the box part 83 abut the projections 28a, 28b, and the side faces 83a, 83 are elastically moved by the tapered surface 84a.
b is opened gradually, but when it is pushed further, the locking projection 84,
84 passes over the protrusions 28a and 28b to form the depressions 31,
The side plates 83a and 83b are elastically restored by being fitted in the 31 and locked, and come into close contact with the protrusions 28a, 28b and 29. Then, the left end portion 60b of the drive rod 60 housed in the cylindrical portion 82 of the cap 80 contacts the stopper 82a, and the elastic return force from the coil spring 40 acts. For this reason, the locking protrusions 84, 84 have the recesses 31, 31.
In, the state is strongly locked to the back of the protrusions 28a and 28b. Further, the four fitting pins 30, ... Of the protrusions 28a, 28b, 29 are provided on the back plate 83c of the cap 80.
Shaft part 75 at the left end of the rotor 70
Is fitted into the shaft hole 85 of the back plate 83c of the cap 80.

The damper 10 thus assembled is attached to the mounting plate 25.
In the mounting holes 25a and 81a of 81 and 81, they are fixed by screws or the like as shown in FIG. 7, and the rotating shaft B such as the door A is fixed to the left end portion 60b of the drive rod 60 so as to rotate integrally. . That is, the fitting protrusions 63, 63 at the left end 60b are fitted into the fitting groove B1 of the rotating shaft B.

Next, the operation of the damper 10 will be described.

When the door A is opened as shown in FIG. 7, the rotating shaft B is rotated as shown by an arrow in FIG. 6, and the drive rod 60 is integrated with this.
Also rotates. Since the cam surface 62a of the drive rod 60 is in contact with the cam surface 52a of the non-rotatable cylindrical cam 50, this rotation causes the cylindrical cam 50 to be pressed to the right by the guide groove 21a to the right. Move along. This rightward movement receives a resistance force by the coil spring 40.

The rotation of the drive rod 60 is transmitted by the gears 61 and 74, and rotates in the opposite direction of the rotor 70. This rotation is performed by the cylindrical portion 71 of the rotor 70 and the second rotating body accommodating tubular portion 2
The viscous resistance force by the oil between the inner wall surface of No. 2 and the outer peripheral surface of the inner cylindrical portion 27 is received. Therefore, as shown in FIG. 7, when the heavy door A is opened downward under its own weight, a large resistance acts on the rotation of the door A, so that the door A opens slowly.

In this embodiment, as shown in FIG. 3, since the drive rod 60, the cylindrical cam 50, and the first rotary body accommodating cylinder portion 21 are all hollow, for example, a wiring cord from the door A side, etc. The first rotating body accommodating cylinder portion 21 can be penetrated from the rotating shaft B and wired rightward.

In the above embodiment, the case where the damper action works in one direction as shown in FIG. 6 has been described, but the cam surfaces of the drive rod 60 and the cylindrical cam 50 of FIG. 1 are provided not only on one side but on both sides. If so, the damper action can be performed in both directions.

Further, in the above-described embodiment, the first rotating body accommodating cylinder portion 21 side to which the rotating shaft B is connected is the rectilinear body, the coil spring, and the second rotating body.
Although the rotating body accommodating cylinder portion 22 side has the oil viscosity resistance, it can be configured in the opposite manner.

Further, both may be a rectilinear body and a coil spring.

Further, instead of two axes, gears may be further transmitted laterally to form three or more axes.

By selecting the coil spring 40,
The resistance to rotation can be adjusted freely.

Also, prepare various kinds of inclined surface of the cam surface,
By selecting this, it is possible to freely adjust the resistance against rotation.

Further, although the resistance force is freely adjusted by the coil spring 40, the awkward rotation that may be caused by the spring force can be smoothed by using the oil viscosity resistance together.

<Effects of the Present Invention> As described above, the damper of the present invention is provided with the first and second rotary body accommodating tubular portions 21 and 2 which are provided laterally in parallel with each other.
The first and second rotating bodies 60 and 70 are rotatably housed in the second rotating body 2, respectively, and two rotating bodies arranged side by side in parallel with each other rotate in association with the rotation by the external rotating shaft. The resistance force of the coil spring 40 in the first rotating body accommodating cylinder portion 21 and the two resistance forces in the two axes of the viscous resistance force between the second rotating body accommodating cylinder portion 22 and the second cylindrical portion 71 are moved. Since the viscous resistance is generated at the circumferential surface of the cylindrical portion in the axially extending direction of the rotating shaft rather than in the radial direction of the rotating shaft, the coil spring in the first rotating body accommodating cylinder portion 21 Even if the diameter of 40 is small, it is not too long in the axial direction, and the diameter of the second rotating body accommodating tubular portion 22 is small, and it is not too long in the axial direction, a sufficiently large rotation resistance force is obtained. Can be given.

Further, even when the resistance is set by the coil spring for both the two shafts, the two resistance forces in the two shafts simultaneously act, so that the diameters and the axial lengths of the first and second rotating body accommodating cylinder portions 21, 22 are small. Also, a sufficiently large rotation resistance force can be given.

Therefore, the first and second rotary body accommodating cylinder portions 21 and 22 need only be small in the radial direction and the axial direction, and the entire device can be downsized, and the two rotary body accommodating cylinder portions 21 and 22 are arranged in the radial direction. Since it does not have a large size and is provided side by side in parallel with each other, if the damper is fixed to a plane parallel to the side by side arrangement, it can be easily attached to the opening edge of the housing, as in the conventional example described above. There is no restriction on mounting the damper.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is an exploded perspective view thereof, FIG. 2 is a perspective view in an assembled state, and FIG.
Fig. 5 is a sectional view taken along the line III-III in Fig. 2, Fig. 4 is a perspective view of the housing drawn from the left side, Fig. 5 is a perspective view drawn with the cap removed, and Fig. 6 is a sectional view for explaining the operation. ,
FIG. 7 is a perspective view showing an example used for opening and closing the door. FIG. 8 is an exploded perspective view showing a conventional damper, and FIG. 9 is a sectional view in an assembled state. 10 ... Damper, 20 ... Housing, 21 ... First
Rotating body accommodating cylinder portion, 21a ... guide groove, 22 ... second
Rotating body accommodating cylinder part, 24a ... stopper, 25 ... mounting plate, 27 ... inner cylinder part, 28a, 28b, 29 ... protruding part, 40 ... coil spring, 50 ... cylindrical cam, 5
1 ... Guide protrusion, 52 ... Notch, 52a ... Cam surface, 60 ... Drive rod, 60a ... Right end part, 60b ...
... left end part, 61 ... gear part, 62 ... notch, 62a ...
... Cam surface, 63 ... Mating protrusion, 70 ... Rotor, 71 ...
… Cylindrical part, 72,73 …… 0 ring, 74 …… Gear part,
75 ... Shaft, 80 ... Cap, 81 ... Mounting plate, 8
2 ... Cylindrical part, 82a ... Stopper, 83 ... Box part, 8
3a, 83b ... Side plate, 84 ... Locking protrusion.

Claims (2)

[Scope of utility model registration request] 1. A housing (20) in which cylindrical first and second rotary body accommodating cylinder portions (21) and (22) whose axes are parallel to each other are integrally provided side by side in parallel with each other. , The first and second rotary body accommodating cylinders (21) and (22) are rotatably accommodated in the first and second cylinders (60a) and (71), respectively, and mesh with each other. First and second rotating bodies (6) that rotate in opposite directions by the first and second gear parts (61) and (74) and have axial directions parallel to each other.
0) and (70), which are non-rotatably housed in the first rotating body accommodating cylinder portion (21) and are slidable in the axial direction of the first rotating body accommodating cylinder portion (21), and Of the first rotating body (60) slides axially in the first rotating body accommodating tubular portion (21) in contact with the axial tip of the cylindrical portion (60a). A rectilinear body and a first rotating body accommodating cylinder portion (21) accommodated therein, and a resistance force is imparted to the rectilinear body in the axial direction due to the rotation of the first rotating body (60). The coil spring (40), the second rotating body (70) and the second cylindrical portion (71) of the second rotating body (70) rotatably accommodated in the second rotating body accommodating cylinder portion (22). A viscous resistance body interposed between the second rotating body accommodating cylinder portions (22) to impart a resistance force to the rotation of the second cylindrical portion (71); , The coil spring in the first rotating body accommodating cylinder portion (21) with respect to the rotation of the external rotating shaft fixed to one of the second rotating body accommodating cylinder portions (21) and (22). A damper, wherein the resistance force of (40) and the resistance force of the viscous resistor in the second rotating body accommodating cylinder portion (22) are simultaneously applied. 2. A housing (20) integrally provided with cylindrical first and second rotary body accommodating cylinder portions (21) and (22) whose axes are parallel to each other and laterally arranged side by side. , The first and second rotary body accommodating cylinders (21) and (22) are rotatably accommodated in the first and second cylinders (60a) and (71), respectively, and mesh with each other. First and second rotating bodies (6) that rotate in opposite directions by the first and second gear parts (61) and (74) and have axial directions parallel to each other.
0) and (70), which are non-rotatably housed in the first rotating body accommodating cylinder portion (21) and are slidable in the axial direction of the first rotating body accommodating cylinder portion (21), and Of the first rotating body (60) slides axially in the first rotating body accommodating tubular portion (21) in contact with the axial tip of the cylindrical portion (60a). A first rectilinear body, and a first rectilinear body accommodated in the first rotating body accommodating tubular portion (21), and the first rectilinear body is allowed to rectilinearly move in the axial direction by the rotation of the first rotating body (60). A first coil spring that applies a resistance force to the second rotating body accommodating cylinder portion (22) and is axially slidable in the second rotating body accommodating cylinder portion (22); The second rotating body accommodating cylinder portion (2) is accommodated and comes into contact with the axial tip end portion of the second cylindrical portion (71), and axially moves in response to the rotation of the second rotating body (70). ) And a second rectilinear body which is housed in the second rotating body accommodating cylinder part (22) and is slidable in the second rotating body (70). An external spring fixed to either of the first and second rotating body accommodating cylinder portions (21) and (22), which comprises a second coil spring that imparts a resistance force to the straight movement in the axial direction. With respect to the rotation of the moving shaft, the resistance force of the first coil spring in the first rotating body containing cylinder (21) and the second coil in the second rotating body containing cylinder (22). A damper characterized by being simultaneously given a resistance force by a spring.