JP2006250191A - Damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper in which viscous fluid is settled to charge at a time, it is possible to reduce a time for tuning up, or it does not need to take the time for tuning up separately. <P>SOLUTION: The damper is comprised of a housing main body 2 and a cap 9. The damper is provided with a cylindrical housing 1 in which concentric walls 4, 5, 7I, 7O, 11, 12, 13I and 13O are formed inside the bottom and the roof in which the housing main body 2 and the cap 9 are opposed, a rotor 21 in which concentric cylindrical walls 25I, 25M and 25O fitted in the clearance of the concentric walls 4, 5, 7I, 7O, 11, 12, 13I and 13O are formed in both the sides of a disk-like part 22, and which is rotatably housed in the housing 1, the viscous fluid 31 charged in the housing 1, and O-rings 41 and 42 to protect the viscous fluid 31 from leaking from the clearance between the housing 1 and the rotor 21. A plurality of through holes 22i, 22m and 22o are circumferentially formed in the part of the disk-like part 22 sandwiched by a support shaft 24 and the cylindrical walls 25I, 25M, and 25O. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damper that generates a braking torque by rotating a rotor relative to a housing.

A first member and a second member that each have an annular groove, an annular protrusion that fits in the groove, and is rotatably combined with the protrusion in the groove, as the damper, and the first member There has been proposed a viscous fluid housed between the opposing surfaces of the second member.
Japanese Patent Laid-Open No. 11-30261

Since the conventional damper described above is composed of the first member and the second member except for the viscous fluid, the viscous fluid may leak from between the first member and the second member.
Therefore, the damper is designed to prevent leakage of viscous fluid from between the housing consisting of the housing body and the cap, the rotor rotatably accommodated in the housing, the viscous fluid accommodated in the housing, and the housing and the rotor. It is possible to prevent the viscous fluid from leaking by using an O-ring to prevent it.
However, when the rotor is rotatably accommodated in the housing, an appropriate amount of viscous fluid is filled in the housing body, and after the rotor is accommodated in the housing body, the viscous fluid is filled once by closing with a cap. If it is attempted to do so, the viscous fluid is difficult to flow between the rotor and the cap, so that uneven braking torque occurs.
In order to eliminate this braking torque unevenness, it is necessary to tune up for a long time.
When the rotor is rotatably accommodated in the housing, an appropriate amount of viscous fluid is filled in the housing body, the rotor is accommodated in the housing body, an appropriate amount of viscous fluid is again filled on the rotor, and then the cap is used. When closed, the viscous fluid can be filled between the rotor and the cap, but the viscous fluid is filled twice.

  The present invention has been made in order to solve the above-described disadvantages. A damper that only needs to be filled with a viscous fluid and can be shortened in tune-up time, or does not require additional tune-up time. Is to provide.

The present invention is as follows.
(1) A cylindrical housing comprising a housing body and a cap, each having a concentric wall on the inner surface of the bottom and the ceiling facing the housing body and the cap, and the concentric wall A concentric cylindrical wall to be fitted is provided on both surfaces of the disk-shaped portion, and a rotor rotatably accommodated in the housing, a viscous fluid filled in the housing, and the housing and the rotor And a sealing material that prevents the viscous fluid from leaking from between, and a plurality of through holes are provided in the circumferential direction in the portion of the disk-shaped portion sandwiched between the cylindrical walls. Damper.
(2) In the damper described in (1), the plurality of through holes are formed in an arc shape.
(3) The damper according to (1) or (2) is characterized in that the plurality of through holes are three or more and are provided at equal intervals in the circumferential direction.
(4) In the damper according to any one of (1) to (3), the thickness of at least one of the concentric wall and the cylindrical wall is reduced from the radial inner side to the radial outer side. It is characterized by that.
(5) The damper according to any one of (1) to (4), wherein a non-circular hole or a non-circular hole is provided in a central portion of the disk-shaped portion exposed from the housing. To do.

According to the present invention, a cylindrical housing comprising a housing main body and a cap, each having a concentric wall provided on the inner surface of the bottom and the ceiling facing the housing main body and the cap, and the concentric circular wall. The concentric cylindrical walls to be fitted are provided on both sides of the disk-shaped portion, the rotor rotatably accommodated in the housing, the viscous fluid filled in the housing, and the viscous fluid from between the housing and the rotor Since a plurality of through holes are provided in the circumferential direction in the portion of the disk-shaped portion sandwiched between the cylindrical walls, the viscous fluid is passed through the plurality of through holes. By moving, it is only necessary to fill the viscous fluid once, and it is possible to shorten the tune-up time and to assemble with good workability.
If the viscous fluid is filled while rotating the rotor, it is not necessary to take a separate tune-up time.
Since the plurality of through-holes are formed in an arc shape, the viscous fluid can move more smoothly, the tune-up time can be further shortened, and the work can be assembled with higher workability.
Furthermore, since there are three or more through holes and at equal intervals in the circumferential direction, the disk-shaped part of the rotor rotates when the viscous fluid in the braking state moves through the plurality of through holes. It is possible to maintain flatness.
Since the thickness of at least one of the concentric wall and the cylindrical wall is reduced from the inner side in the radial direction toward the outer side in the radial direction, the size and weight can be reduced.
Furthermore, since the non-circular hole or the non-circular hole is provided in the central portion of the disc-shaped portion exposed from the housing, the rotation shaft having a non-circular cross section can be attached to rotate integrally with the rotor.

  Embodiments of the present invention will be described below with reference to the drawings.

  1A is a plan view of a damper according to an embodiment of the present invention, FIG. 1B is a front view of the damper shown in FIG. 1A, and FIG. 1C is a plan view of FIG. 2A is a plan view of the housing main body shown in FIG. 1, FIG. 2B is a front view of the housing main body shown in FIG. 2A, and FIG. 2A is a bottom view of the housing body shown in FIG. 2A, FIG. 2D is a sectional view taken along line BB in FIG. 2A, and FIG. 3A is a plan view of the cap shown in FIG. 3 (b) is a front view of the cap shown in FIG. 3 (a), FIG. 3 (c) is a bottom view of the cap shown in FIG. 3 (a), and FIG. 3 (d) is FIG. 4C is a cross-sectional view taken along line C-C, FIG. 4A is a plan view of the rotor shown in FIG. 1, FIG. 4B is a front view of the rotor shown in FIG. 4A, and FIG. Is the line DD in FIG. It is a surface view.

In FIG. 1, a damper D includes a cylindrical housing 1, a rotor 21 partially accommodated in the housing 1, a viscous fluid 31 such as silicone oil or grease filled in the housing 1, It is comprised by O-rings 41 and 42 as a sealing material which prevents that the viscous fluid 31 leaks from between the housing 1 and the rotor 11. FIG.
The housing 1 and the rotor 11 are molded from different synthetic resins.

The housing 1 described above is composed of a housing body 2 and a cap 9 as shown in FIG.
As shown in FIG. 2, the housing body 2 includes an annular bottom portion 3, an inner sealing cylindrical wall 4 as a concentric circular wall provided on the inner side of the annular bottom portion 3, and an annular bottom portion 3. An outer cylindrical wall 5 as a concentric circular wall concentric with the inner sealing cylindrical wall 4, which is provided at the outer edge of the inner side surface of the inner side surface of the inner sealing cylindrical wall 4. 5 provided in a radially extending state at a symmetrical position between the inner sealing cylindrical wall 4 and the outer cylindrical wall 5 on the inner side surface of the annular bottom 3. An inner concentric wall 7I and an outer concentric wall 70 provided concentrically on the inner sealing cylindrical wall 4 and the outer cylindrical wall 5 at equal intervals in the radial direction.
The inner concentric wall 7I is provided with a gap 7i divided by 45 degrees.
The outer concentric wall 7O is provided with a gap 7o that communicates with the gap 7i in the radial direction in a 45-degree division.
An inner groove 8I that circulates between the inner sealing cylindrical wall 4 and the inner concentric wall 7I, an intermediate groove 8M that circulates between the inner concentric wall 7I and the outer concentric wall 7O, and The outer groove 8O is formed between the outer cylindrical wall 5 and the outer concentric wall 70.

As shown in FIG. 3, the cap 9 described above is an annular ceiling portion 10 and a concentric circular wall provided inside the inner side surface of the annular ceiling portion 10 and facing the inner sealing cylindrical wall 4. The inner sealing cylindrical wall 11 and the outer side as a concentric circular wall concentric with the inner sealing cylindrical wall 11 provided at the outer edge of the inner side surface of the annular ceiling portion 10 and into which the thin wall portion 5a of the outer cylindrical wall 5 is inserted. Concentric circles between the inner sealing cylindrical wall 11 and the outer cylindrical wall 12 at equal intervals in the radial direction between the cylindrical wall 12 and the inner sealing cylindrical wall 11 and the outer cylindrical wall 12 on the inner surface of the annular ceiling 10. The inner concentric wall 13I facing the inner concentric wall 7I and the outer concentric wall 13O facing the outer concentric wall 70 are provided.
The inner concentric wall 13I is provided with a gap 13i divided by 45 degrees.
In addition, the outer concentric wall 13O is provided with a gap 13o communicating with the gap 13i in the radial direction in a 45-degree division.
An inner groove 14I that circulates between the inner sealed cylindrical wall 11 and the inner concentric wall 13I, and an intermediate groove 14M that circulates between the inner concentric wall 13I and the outer concentric wall 13O, and The outer groove 14O is formed between the outer cylindrical wall 12 and the outer concentric wall 13O.
The outer groove 14O is a stepped groove having a shallow inner side and a deep outer side.

As shown in FIG. 4 or FIG. 1, the rotor 21 described above is provided so as to penetrate a disk-shaped portion 22 having a size that can be accommodated in the housing body 2 and the center of the disk-shaped portion 22, and Is provided with a connecting shaft portion 23 having a square (non-circular) square through-hole 23a, concentric with the connecting shaft portion 23 in the disk-like portion 22, and penetrating on both the upper and lower surfaces outside the connecting shaft portion 23, A support shaft portion 24 inserted in contact with the inside of the housing body 2 and the cap 9, a disk-like portion 22 concentric with the connection shaft portion 23 and the support shaft portion 24, and a radial direction outward of the support shaft portion 24. The inner cylindrical wall 25I inserted into the inner groove 8I of the housing body 2 and the inner groove 14I of the cap 9, the intermediate groove 8M of the housing body 2 and the intermediate groove 14M of the cap 9 Middle inserted Cylindrical wall 25M, and is composed of an outer cylindrical wall 25O which is inserted into the outer groove 14O outer groove 8O and the cap 9 of the housing body 2.
Since the outer cylindrical wall 25O is inserted into the inner portion of the outer groove 14O provided in the cap 9, the height is lower than the inner cylindrical wall 25I and the intermediate cylindrical wall 25M.
An inner groove 26I that circulates between the support shaft portion 24 and the inner cylindrical wall 25I becomes an intermediate groove 26M that circulates between the inner cylindrical wall 25I and the intermediate cylindrical wall 25M. An outer groove 26O is formed between the side cylindrical wall 25M and the outer cylindrical wall 25O.
Eight arc-shaped through-holes 22i are provided at equal intervals in the circumferential direction in the disk-shaped portion 22 portion of the inner groove 26I, and 8 at equal intervals in the circumferential direction in the disk-shaped portion 22 portion of the intermediate groove 26M. Two arc-shaped through-holes 22m are provided, and eight arc-shaped through-holes 22o are provided at equal intervals in the circumferential direction in the disk-like portion 22 portion of the outer groove 26O.

Next, an example of assembly will be described.
First, the housing body 2 is fixed with the open end side facing up, and an appropriate amount of viscous fluid 31 is filled in the grooves 8I, 8M, and 80 of the housing body 2.
Then, the rotor 21 having the lower side of the support shaft portion 24 fitted to the O-ring 41 up to the disc-like portion 22 is inserted into the housing main body 2, and the support shaft portion 24 is fitted inside the housing main body 2 to the inner groove 8I. The inner cylindrical wall 25I is fitted, the intermediate cylindrical wall 25M is fitted into the intermediate groove 8M, and the outer cylindrical wall 25O is fitted into the outer groove 8O.
When the rotor 21 is inserted into the housing body 2 in this way, a gap 7i is provided in the inner concentric wall 7I, a gap 7o is provided in the outer concentric wall 7O, and the disc-like portion 22 has through holes 22i, 22m and 22o are provided, so that the excess viscous fluid 31 and air in the grooves 8I, 8M, and 8O move through the gaps 7i and 7o and the through holes 22i, 22m, and 22o, so that the disc It moves to each groove | channel 26I, 26M, and 27O on the shape part 22. FIG.

Next, the support shaft portion 24 is inserted and fitted inside the cap 9 fitted to the O-ring 42 inside the inner sealing cylindrical wall 11, and the inner sealing cylindrical wall 11 and the O-ring 42 are fitted into the inner groove 26I. The inner concentric wall 13I is fitted in the intermediate groove 26M, the outer concentric wall 13O is fitted in the outer groove 26O, and the thin portion 5a of the outer cylindrical wall 5 is fitted inside the outer cylindrical wall 12.
When the cap 9 is attached in this way, air escapes from between the housing 1 and the rotor 21, and the viscous fluid 31 in the grooves 26I, 26M, and 26O on the disk-like portion 22 moves through the gaps 13i and 13o. To fill the space between the cap 9 and the rotor 21.
In this state, the viscous fluid 31 is sealed between the housing body 2 and the rotor 21 by the O-ring 41 so as not to leak, and the viscous fluid 31 is leaked between the cap 9 and the rotor 21 by the O-ring 42. It is sealed so that there is no.

  Next, as shown in FIG. 1, the damper D is assembled by welding and sealing between the outer periphery of the thin portion 5a and the inner periphery of the outer cylindrical wall 12 by, for example, high-frequency welding. The assembly is completed.

Next, another example of assembly will be described.
First, the rotor 21 fitted to the O-ring 41 from the lower side of the support shaft part 24 to the disk-like part 22 is inserted into the housing body 2 fixed with the open end side facing up, and the support shaft part 24 is inserted into the housing body. 2, the inner cylindrical wall 25I is fitted into the inner groove 8I, the intermediate cylindrical wall 25M is fitted into the intermediate groove 8M, and the outer cylindrical wall 25O is fitted into the outer groove 8O.
Then, an appropriate amount of viscous fluid 31 is filled in each of the grooves 26I, 26M, and 26O on the disk-like portion 22 while rotating the rotor 21 by engaging the drive shaft with the connecting shaft portion 23.
When an appropriate amount of the viscous fluid 31 is filled in the grooves 26I, 26M, and 26O in this way, the viscous fluid 31 passes through the through holes 22i, 22m, and 22o of the disk-like portion 22, the gap 7i of the inner concentric wall 7I, and the outer concentric circle. The space between the housing body 2 and the rotor 21 is filled through the gap 7o of the wall 7O, and the air between the housing body 2 and the rotor 21 escapes through the gaps 7i, 7o and the through holes 22i, 22m, 22o. .

  Next, when the filling of the viscous fluid 31 is completed, the damper D can be assembled as shown in FIG. 1 by separating the drive shaft from the connecting shaft portion 23 and then assembling in the same manner as the previous assembly method. it can.

Next, the operation will be described.
When the rotor 21 of the damper D assembled as described above is rotated with respect to the housing 1, the rotor 21 is moved to the housing 1 by the viscosity of the viscous fluid 31 filling between the housing 1 and the rotor 21 and the shear resistance. Braking against rotation.
When the rotor 21 rotates in this way, the viscous fluid 31 moves through the through holes 22i, 22m, and 22o, so that the planarity in which the disk-like portion 22 of the rotor 21 rotates can be maintained.

As described above, according to an embodiment of the present invention, the housing body 2 and the cap 9 are provided, and the walls 4, 5, 7I, Each cylindrical wall 25I, 25M fitted between the cylindrical housing 1 provided with 7O, 11, 12, 13I, 13O and each wall 4, 5, 7I, 7O, 11, 12, 13I, 13O. , 25O are provided on both sides of the disk-shaped part 22 and are rotatably accommodated in the housing 1, the viscous fluid 31 filled in the housing 1, and the viscous fluid from between the housing 1 and the rotor 21. O-rings 41 and 42 for preventing 31 from leaking, and a plurality of through-holes 22i and 22i are formed in a portion of the disk-like portion 22 sandwiched between the support shaft portion 24 and the respective cylindrical walls 25I, 25M and 25O. 22m, 22o in the circumferential direction Since the viscous fluid 31 moves through the plurality of through holes 22i, 22m, and 22o, the viscous fluid 31 can be filled only once, and the tune-up time can be shortened. Can be assembled well.
If the viscous fluid 31 is filled while the rotor 21 is rotated, it is not necessary to take a separate tune-up time.
Since the plurality of through holes 22i, 22m, and 22o are formed in an arc shape, the movement of the viscous fluid 31 becomes smoother, the tune-up time can be further shortened, and the workability can be further improved. it can.
Further, since the plurality of through holes 22i, 22m, and 22o are provided at equal intervals in the circumferential direction, the viscous fluid 31 in the braking state moves through the plurality of through holes 22i, 22m, and 22o. Further, the planarity in which the disc-like portion 22 of the rotor 21 rotates can be maintained.
And since the square through-hole 23a (non-circular hole) was provided in the center part of the disk-shaped part 22 exposed from the housing 1, it attaches so that the rotating shaft of a non-circular cross section may rotate integrally with the rotor 21. FIG. it can.

In the embodiment described above, the housing body 2 and the cap 9 are provided with holes so that both sides of the rotor 21 are exposed. However, one of the housing body 2 and the cap 9 is not exposed to the rotor 21. Also good.
In addition, although the example in which the plurality of through-holes 22i, 22m, and 22o are eight and provided at equal intervals in the circumferential direction has been shown, since there are three in order to form a plane, the plurality of through-holes 22i , 22m, and 22o, and the same effect can be obtained by providing them at equal intervals in the circumferential direction.
Furthermore, although the example in which the non-circular square through hole 23a is provided in the connecting shaft portion 23 has been shown, there are many non-circular holes such as a triangle, a regular triangle, a quadrangle, a pentagon, a regular pentagon, a hexagon, and a regular hexagon. A square hole or an oval hole may be used, or one of the holes may be a closed hole.
In addition, the example which made the thickness of each wall 4,5,7I, 7O, 11,12,13I, 13O substantially the same, and made the thickness of each cylindrical wall 25I, 25M, 25O substantially the same was shown. However, since each resistance of the viscous fluid 31 is larger toward the inner side and smaller toward the outer side, each of the walls 4, 5, 7I, 7O, 11, 12, 13I, 13O, 25I, 25M, and 25O is radially outward from the radial direction. Even if it is made thinner, it is possible to ensure strength.
Accordingly, the thickness of at least one of the concentric walls (4, 5, 7I, 7O, 11, 12, 13I, 13O) and the cylindrical walls (25I, 25M, 25O) is increased from the radially inner side to the radially outer side. By reducing the thickness, the size and weight can be reduced.

1A is a plan view of a damper according to an embodiment of the present invention, FIG. 1B is a front view of the damper shown in FIG. 1A, and FIG. 1C is a cross-sectional view taken along line AA in FIG. FIG. (A) is a plan view of the housing main body shown in FIG. 1, (b) is a front view of the housing main body shown in FIG. 2 (a), and (c) is a bottom view of the housing main body shown in FIG. 2 (a). (D) is sectional drawing by the BB line of Fig.2 (a). (A) is a plan view of the cap shown in FIG. 1, (b) is a front view of the cap shown in FIG. 3 (a), (c) is a bottom view of the cap shown in FIG. 3 (a), (d) ) Is a cross-sectional view taken along line CC of FIG. (A) is a plan view of the rotor shown in FIG. 1, (b) is a front view of the rotor shown in FIG. 4 (a), and (c) is a cross-sectional view taken along line DD in FIG. 4 (a). .

Explanation of symbols

D damper 1 housing 2 housing body 3 annular bottom 4 inner sealed cylindrical wall (concentric circular wall)
5 Outer cylindrical wall (concentric wall)
5a Thin portion 6 Mounting portion 6a Mounting hole 7I Inner concentric circular wall 7i Clearance 7O Outer concentric circular wall 7o Clearance 8I Inner groove 8M Intermediate groove 8O Outer groove 9 Cap 10 Toroidal ceiling 11 Inner sealing cylindrical wall (concentric circular wall)
12 Outer cylindrical wall (concentric wall)
13I inner concentric wall 13i gap 13O outer concentric wall 13o gap 14I inner groove 14M intermediate groove 14O outer groove 21 rotor 22 disk-shaped part 22i through hole 22m through hole 22o through hole 23 connecting shaft part 23a square through hole (non-circular) Hole)
24 support shaft portion 25I inner cylindrical wall 25M intermediate cylindrical wall 25O outer cylindrical wall 26I inner groove 26M intermediate groove 26O outer groove 31 viscous fluid 41 O-ring (sealing material)
42 O-ring (sealing material)

Claims (5)

A cylindrical housing having a housing body and a cap, each of which has concentric walls provided on the inner surfaces of the bottom and the ceiling facing the housing body and the cap;
A concentric cylindrical wall that fits between the concentric walls is provided on both sides of the disk-shaped part, and a rotor rotatably accommodated in the housing;
A viscous fluid filled in the housing;
A sealing material for preventing the viscous fluid from leaking between the housing and the rotor;
A plurality of through holes are provided in the circumferential direction in the portion of the disk-shaped portion sandwiched between the cylindrical walls,
Damper characterized by that. The damper according to claim 1, wherein
The plurality of through holes are arcuate,
Damper characterized by that. The damper according to claim 1 or 2,
The number of the plurality of through holes is three or more, and provided at equal intervals in the circumferential direction.
Damper characterized by that. The damper according to any one of claims 1 to 3,
The thickness of at least one of the concentric wall and the cylindrical wall is reduced from the radially inner side toward the radially outer side,
Damper characterized by that. The damper according to any one of claims 1 to 4, wherein:
A non-circular hole or a non-circular hole is provided in the central portion of the disk-shaped portion exposed from the housing.
Damper characterized by that.

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