JP2007309501A - Rotary damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically cope with the change of temperature environment to obtain a predetermined damper effect. <P>SOLUTION: This rotary damper device has a rotor 20 disposed in a case 10 filled with an operating liquid Q, and applies shearing resistance of the operating liquid Q to a facing clearance T between the case 10 side and the rotor 20 side with the rotation of the rotor 20. The rotary damper device is provided with an adjusting part A displaced following the temperature change to change a clearance H of the facing clearance T. The change of temperature environment is automatically coped with to obtain the predetermined damper effect. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary damper device capable of obtaining a predetermined damper effect corresponding to a change in temperature environment.

  An example of a conventional rotary damper device is disclosed in Japanese Patent Application Laid-Open No. 61-24852. This rotating damper device operates normally within the allowable range of the set temperature because the viscosity of the working fluid fluctuates due to changes in the temperature environment to be used, but the temperature environment is within the allowable range of the set temperature. If the height exceeds the upper limit, the predetermined damper effect may not be obtained.

  Therefore, as a rotary damper device capable of obtaining a predetermined damper effect without being influenced by changes in the temperature environment, for example, the one described in Japanese Patent No. 3124898 has been developed. However, this apparatus has a problem that a predetermined damper effect cannot be obtained automatically in response to a change in temperature environment, for example, it must be artificially adjusted in accordance with the environment temperature to be used.

JP-A 61-24852 Japanese Patent No. 312898

  The problem to be solved is that a predetermined damper effect cannot be obtained automatically in response to changes in the temperature environment used.

  In the present invention, in order to automatically cope with a change in temperature environment, a rotor is disposed in a case in which a working liquid is sealed, and the working liquid is sheared between the case side and the rotor side as the rotor rotates. In the rotary damper device in which resistance is applied, a rotary damper device characterized in that an adjustment section is provided that changes the distance between the opposing surfaces by following a change in temperature.

  A rotary damper device according to the present invention is a rotary damper in which a rotor is disposed in a case enclosing a working liquid, and a shear resistance of the working liquid acts between the case side and the rotor side as the rotor rotates. In the apparatus, an adjustment unit that changes the distance between the opposing surfaces by changing following the temperature change is provided, so that a predetermined damper effect can be obtained reliably in response to a change in the temperature environment used. .

  FIGS. 1 to 3 show a rotary damper device according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional explanatory view of main parts showing an operating state at a high temperature, and FIG. 2 shows the operating state at a normal temperature. FIG. 3 is an essential half-section explanatory view showing an operating state at a low temperature.

  A rotary damper device E1 to which the first embodiment of the present invention is applied includes a case 10, a rotor 20, and an adjustment unit A.

  The case 10 is provided with a working chamber 11 that houses the rotor 20 and encloses a working liquid Q such as silicon oil.

  The rotor 20 includes a brake disc 21 formed in a disc shape, a rotary shaft 22 that is integrally projected on the center of the brake disc 21, and a center of the rotary shaft 22 so as to match the brake. The mounting hole 23 is provided so as to open to the lower surface of the panel 21.

  At the center of the bottom surface of the working chamber 11 that accommodates the rotor 20 configured in this manner, a mounting rotary shaft 12 that loosely rotates loosely with the mounting hole 23 is integrally projected. A brake board housing part 13 for housing the brake board 21 is formed around the mounting rotary shaft 12, and a shear resistance generating part 14 is formed in a donut shape on the outer peripheral side including the brake board housing part 13.

  The adjusting portion A is constituted by the bimetal 30 in the first embodiment. The shape of the bimetal 30 on the outer diameter side is formed in a disk shape substantially the same as that of the brake board 21, and the shape on the inner diameter side is a circumferential groove 16 for attaching the bimetal formed in the inner peripheral wall 15 of the shear resistance generating portion 14. When the temperature rises, it curves toward the brake panel 21 in response to the rising temperature, and when the temperature decreases, the anti-braking panel corresponds to the decreasing temperature. It is comprised so that it may curve to 21 side.

  As shown in FIG. 2, the bimetal 30 has a flat plate shape in use at room temperature, and an interval H <b> 1 between the facing side T between the case 10 side and the rotor 20 side, that is, the brake plate side surface 30 a of the bimetal 30 and the brake plate 21. The distance T between the facing surface 21a and the curved surface 21a is H1, and a shear resistance corresponding to the viscosity of the working liquid Q used at room temperature can be obtained.

  The shear resistance corresponding to the viscosity is not obtained only by the above-described facing T, but in the case of this embodiment, the entire gap S forming the brake board housing portion 13 is involved. However, since this participation is also involved at the same rate even when the temperature of the working liquid Q changes, it will be omitted in the following description.

  When the temperature rises, the bimetal 30 is curved toward the brake board 21 in accordance with the raised temperature, and the facing interval T between the brake board side face 30a of the bimetal 30 and the curved face 21a of the brake board 21 is shown in FIG. The interval of H becomes H2 at the set maximum temperature, and becomes narrower than the use state at normal temperature.

The viscosity of the working liquid Q at high temperature is lower than the viscosity at normal temperature, the fluidity is improved, and the shear resistance is reduced. Since it can be automatically narrowed in comparison, the shear resistance can be kept almost constant.

  When the temperature is lowered, the bimetal 30 is curved toward the working chamber 11 as shown in FIG. 3 in accordance with the lowered temperature, and the interval T between the braking plate side surface 30a of the bimetal 30 and the curved surface 21a of the braking plate 21 is T. The interval is H3, which is wider than the use state at room temperature.

  The viscosity of the working liquid Q at a low temperature is higher than the viscosity at normal temperature and the fluidity is lowered, and the shear resistance is improved. Since it can be automatically widened in comparison, the shear resistance can be kept almost constant.

  As described above, in this embodiment, the shape of the bimetal 30 is changed in accordance with the temperature change of the working liquid Q, and thereby the distance T between the braking plate side surface 30a of the bimetal 30 and the curved surface 21a of the braking plate 21 is opposed. The interval H is automatically changed to keep the shear resistance almost constant. As described above, the interval H between the facing portions T, in other words, the gap is changed. However, the overall volume of the working liquid Q is not changed due to this change. Therefore, a predetermined damper effect can be obtained more reliably by automatically responding to changes in the temperature environment.

In addition, although the bimetal was used as a member which comprises the adjustment part A in Example 1, this may use a shape memory alloy.

In the figure, reference numeral 50 denotes a 0 ring, which seals between the rotating shaft 22 of the rotor 20 and the case 10.
(Modification 1 of Example 1)
FIG. 4 shows a rotary damper device according to a first modification of the first embodiment of the present invention, and FIG. 4 is a cross-sectional explanatory view of a main part showing an operating state at a high temperature.

  The rotary damper device E1a according to the first modification of the first embodiment of the present invention has the same structure and effects as the rotary damper device E1 according to the first embodiment described above, and therefore, detailed description thereof is omitted. Only the point will be described.

The rotation damper device E1a according to the first modification differs from the rotation damper device E1 according to the first embodiment described above, as is apparent from the figure. The adjustment part A for changing H is provided in the case 10 so as to face both sides of the brake panel 21 constituting the rotor 20.
As described above, in the first modification, the adjustment portion A is provided on the case 10 so as to be opposed to both sides of the brake panel 21, so that the damper effect is greatly improved as compared with the case where the adjustment part A is provided only on one side of the brake board 21. Can be improved.
(Modification 2 of Example 1)
FIG. 5 shows a rotary damper device according to a second modification of the first embodiment of the present invention, and FIG. 5 is an explanatory view of a half of a main part showing an operating state at a high temperature.

  The rotary damper device E1b according to the second modification of the first embodiment of the present invention has the same structure and effects as the rotary damper device E1 according to the first embodiment described above, and detailed description thereof is omitted. Only the point will be described.

The rotational damper device E1b according to the modified example 2 differs from the rotational damper device E1 of the first embodiment described above in that the adjustment unit A operates in a shear resistance when operating at a high temperature, as is apparent from the drawing. The point is that the generator 14 is blocked.
That is, the adjustment part A is configured by the bimetal 30 as in the first embodiment, and when the temperature rises, the bimetal 30 is curved toward the brake panel 21 as shown in FIG. The distance T between the opposing sides of the brake plate side surface 30a of the bimetal 30 and the curved surface 21a of the brake plate 21 is H2 at the set maximum temperature, which is narrower than that in use at room temperature, and the outer periphery of the bimetal 30 is braked. The board storage part 13 and the shear resistance generation part 14 are shut off.

  Therefore, the generation of the shearing resistance due to the rotation of the rotor 20 is generated by the working liquid Q in a narrow range of the distance H2 between the opposing surfaces T of the brake plate side surface 30a of the bimetal 30 and the curved surface 21a of the brake plate 21. A damper effect at high temperatures can be obtained reliably.

  6 to 10 show a rotary damper device according to a second embodiment of the present invention. FIG. 6 is a cross-sectional explanatory view of a main part showing an operating state at a high temperature, and FIG. 7 shows the operating state at a normal temperature. FIG. 8 is a cross-sectional view of an essential part showing an operating state at a low temperature, and FIGS. 9 and 10 are plan explanatory views showing examples of a bimetal constituting the adjustment part.

  The rotary damper device E2 according to the second embodiment of the present invention is similar in structure and effect to the rotary damper device E1 according to the first embodiment described above, and therefore detailed description thereof is omitted, and only differences are described. explain.

The rotary damper device E2 according to the second embodiment is different from the rotary damper device E1 according to the first embodiment as described above. This is the point that the adjusting portion A that changes the above is provided directly on both sides of the brake panel 21 that constitutes the rotor 20.
That is, in the second embodiment, the adjustment unit A is configured by the bimetal 30 as in the first embodiment described above. The outer diameter side shape of the bimetal 30 is formed in a disk shape substantially equivalent to the brake board 21, and the inner diameter side shape is a bimetal mounting step 17 provided on the rotating shaft 22 side of the brake board 21. 7 is formed so that it can be attached to the case 10 and has a substantially horizontal flat plate shape as shown in FIG. 7 at room temperature. When the temperature rises, the shear resistance generating portion of the case 10 corresponds to the rising temperature as shown in FIG. 14 is configured to be deformed substantially parallel to the upper and lower circumferential surfaces, and to be deformed when the temperature is lowered, as shown in FIG.

  As shown in FIG. 7, the bimetal 30 has a flat plate shape when used at room temperature, and an interval H <b> 1 between the facing direction T between the case 10 side and the rotor 20 side, that is, the side surface 10 d of the bimetal 30 and the brake panel 21. The distance T between the facing surface 21d and the outer surface 21d is H1, and a shear resistance corresponding to the viscosity of the working liquid Q used at room temperature can be obtained.

  When the temperature rises, the bimetal 30 is deformed substantially parallel to the upper and lower peripheral surfaces of the shear resistance generating portion 14 of the case 10 and the side surface 10d of the case 10 of the bimetal 30 and the brake panel as shown in FIG. The distance T between the opposed surface 21 and the outer surface 21d is H2 at the set maximum temperature, and is narrower than the use state at room temperature.

The viscosity of the working liquid Q at high temperature is lower than the viscosity at normal temperature, the fluidity is improved, and the shear resistance is reduced. Since it can be automatically narrowed in comparison, the shear resistance can be kept almost constant.

  When the temperature is lowered, the bimetal 30 is deformed corresponding to the lowered temperature until it abuts against the surface of the brake board 21 as shown in FIG. 8, and the case 10 side surface 10d of the bimetal 30 and the outer side surface 21d of the brake board 21 face each other. The interval T is H3, which is wider than the use state at room temperature.

  The viscosity of the working liquid Q at a low temperature is higher than the viscosity at normal temperature and the fluidity is lowered, and the shear resistance is improved. Since it can be automatically widened in comparison, the shear resistance can be kept almost constant.

  9 and 10 exemplify the shape of the bimetal 30, and in each of the examples, the attachment hole 32 is provided with a detent means 33 so that the bimetal 30 can rotate with the rotor 20 via the brake board 21. It is.

In addition, although the bimetal was used as a member which comprises the adjustment part A in Example 2, this may use a shape memory alloy.

  FIGS. 11 to 13 show a rotary damper device according to Embodiment 3 of the present invention, FIG. 11 is a cross-sectional explanatory view of the main part showing the operating state at a high temperature, and FIG. 12 shows the operating state at a low temperature. FIG. 13 is a plan sectional view showing an example of a bimetal constituting the adjustment unit.

  The rotary damper device E3 according to Embodiment 3 of the present invention is similar in structure and effect to the rotary damper device E1 according to Embodiment 1 described above, and therefore detailed description thereof is omitted, and only the differences are described. explain.

  The rotary damper device E3 according to the third embodiment is different from the rotary damper device E1 according to the first embodiment described above in the configuration of the adjusting unit A as is apparent from the drawing. That is, in this embodiment, the adjusting unit A is movable and supported on the case 10 side or the rotor 20 side and changes so as to change the interval H between the facings T, and the movable plate 40 and the case 10 side or The driving unit D is formed of a bimetal 30 or a shape memory alloy 31 that is supported on the rotor 20 side and displaces the movable plate 40 according to a temperature change, and an elastic member 41 for returning the movable plate 40. Yes.

  That is, the bimetal 30 is attached to the movable plate 40 that is disposed so as to be movable up and down, on a guide 42 that is provided at an interval on the outer peripheral wall of the shear resistance generator 14. The movable plate 40 is disposed so as to oppose the brake board 21, and is arranged on the upper and lower inner surfaces of the shear resistance generating portion 14 by the elastic member 41 interposed on the guide 42 side, that is, each movable plate 40. It is energized in the direction to restore.

  As shown in FIG. 13, in this embodiment, the shape of the bimetal 30 is formed in a substantially gear shape in plan view, and its inner peripheral surface side is attached to the side surface of the case 10 of the movable plate 40. When the temperature rises, the bimetal 30 is deformed so as to bend and press each movable plate 40 toward the brake panel 21 as shown in FIG. 11 corresponding to the rising temperature. As shown in FIG. 2, the structure is configured to be deformed until it comes into contact with the inner surface on the case 10 side.

  Although the use state at normal temperature is not shown, each movable plate 40 moved by the bimetal 30 and the elastic member 41 is located between FIG. 11 and FIG. 12 and corresponds to the viscosity at normal temperature of the working liquid Q used. Shear resistance can be obtained.

  When the temperature rises, as shown in FIG. 11 corresponding to the rising temperature, the interval T between the movable plate 40 and the brake panel 21 becomes H2 at the set maximum temperature, and becomes narrower than the use state at normal temperature. .

The viscosity of the working liquid Q at high temperature is lower than the viscosity at normal temperature, the fluidity is improved, and the shear resistance is reduced. Since it can be automatically narrowed in comparison, the shear resistance can be kept almost constant.

  When the temperature is lowered, as shown in FIG. 12, corresponding to the lowered temperature, the interval T between the movable plate 40 and the brake panel 21 becomes H3, which is wider than the use state at normal temperature.

  The viscosity of the working liquid Q at a low temperature is higher than the viscosity at normal temperature and the fluidity is lowered, and the shear resistance is improved. Since it can be automatically widened in comparison, the shear resistance can be kept almost constant.

  In this embodiment, a bimetal is used as a member constituting the adjusting portion A, but a shape memory alloy may be used. Moreover, although the elastic member 41 used the coil spring, you may use a wave washer for this.

It is principal part cross-sectional explanatory drawing which shows the operating state in the high temperature which shows the rotary damper apparatus which consists of Example 1 of this invention. It is principal part half-section explanatory drawing which shows the operation state at normal temperature same as the above. It is principal part half cross-section explanatory drawing which shows the operation state at low temperature same as the above. It is principal part cross-sectional explanatory drawing which shows the operating state in the high temperature which shows the rotary damper apparatus which consists of the modification 1 of Example 1 of this invention. It is principal part half cross-section explanatory drawing which shows the operating state in the high temperature which shows the rotary damper apparatus which consists of the modification 2 of Example 1 of this invention. It is principal part cross-sectional explanatory drawing which shows the operating state in the high temperature which shows the rotary damper apparatus which consists of Example 2 of this invention. It is principal part cross-sectional explanatory drawing which shows the operation state at normal temperature same as the above. It is principal part cross-sectional explanatory drawing which shows the operation state at low temperature same as the above. It is plane explanatory drawing which shows the example of the bimetal which comprises an adjustment part same as the above. It is plane explanatory drawing which shows the example of the bimetal which comprises an adjustment part same as the above. It is principal part cross-sectional explanatory drawing which shows the operating state in the high temperature which shows the rotary damper apparatus which consists of Example 3 of this invention. It is principal part cross-sectional explanatory drawing which shows the operation state at low temperature same as the above. It is plane explanatory drawing which shows the example of the bimetal which comprises an adjustment part same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Case 20 Rotor 30 Bimetal 31 Shape memory alloy 40 Movable plate 41 Elastic member A Adjustment part D Drive part H Opposite space Q Working liquid T Between opposing

Claims (4)

In a rotary damper device in which a rotor is arranged in a case enclosing a working liquid, and a shear resistance of the working liquid acts between the case side and the rotor side as the rotor rotates.
A rotary damper device characterized in that an adjustment unit is provided for changing the distance between the opposing surfaces by following the temperature change. The rotary damper device according to claim 1,
The rotary damper device is characterized in that the adjusting portion is attached to a rotor side or a case side. The rotary damper device according to claim 1 or 2,
The rotary damper device, wherein the adjusting portion is formed of a bimetal or a shape memory alloy. The rotary damper device according to claim 1 or 2,
The adjusting unit is movable and supported on the case side or the rotor side and changes so as to change the interval between the facings, and the movable plate is supported on the case side or the rotor side and the movable plate according to a temperature change. A rotary damper device comprising: a drive unit formed of a bimetal or a shape memory alloy for displacing the plate and an elastic member for returning the movable plate.

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