JP2004108577A - Hydraulic pressure type damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic pressure type damper capable of surely eliminating any plays between component members even when a spherical bearing is used on a connecting part with a building structure. <P>SOLUTION: In this hydraulic pressure type damper using the spherical bearing 70 on the connecting part with the building structure 57, an outer face of a bearing outer ring member 79 of the spherical bearing 70 and an inner face of an outer ring supporting member 77 kept into contact with the outer face to support the bearing outer ring member 79 respectively have the taper shape corresponding to each other. As the play between the members of the spherical bearing and the like can be surely eliminated, the hydraulic pressure type damper can generate the damping force from the beginning even when the reciprocating external force of small amplitude such as swinging by wind is added, which prevents a person from feeling the uncomfortable swing. Further a deterioration in performance to reduce the external force, of the hydraulic pressure type damper in earthquake and the like can be prevented. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a hydraulic damper, and more particularly to a structure of a connecting portion connected to a building at both ends.

と し て As a first conventional hydraulic damper, for example, there is one as shown in FIG. A conventional hydraulic damper 30 shown in FIG. 1 includes a hydraulic cylinder 32 having a pair of hydraulic chambers 32a and 32b therein, a piston 36 reciprocating in the axial direction of a piston rod 34, and a pressure difference between the hydraulic chambers 32a and 32b. Control valve section 40 having a control valve 40a for controlling the pressure, a ball joint 42 connected to one end of a hydraulic cylinder 32, a ball support section 45 for freely supporting the rotation of the ball joint 42, and the ball joint for the piston rod 34 The ball joint 43 includes a ball joint 43 connected to the end opposite to the end 42, and a ball support 46 that freely supports the rotation of the ball joint 43.

The ball support portions 45 and 46 hold the ball joints 42 and 43 supported by the respective ball joints 42 and 43 with spherical surfaces, and the holder portions 47 and 48 come into contact with the ball joints 42 and 43 without gaps and hold the ball joints 42 and 43. ing. One end of such a hydraulic damper 30 is connected to a building structure, and the other end is connected to one end of a brace.

As a second conventional hydraulic damper, there is, for example, one shown in FIGS. In the conventional hydraulic damper 50 shown in FIG. 22, one end of a connecting member 52 is connected to one end of a hydraulic cylinder 32, and the other end of the connecting member 52 is, as shown in FIG. It is connected to one bracket 57 of the building structure via a spherical bearing 60.

On the other hand, the distal end of the piston rod 34 opposite to the connecting member 52 with respect to the hydraulic cylinder 32 is connected to the other bracket 58 of the building structure via a spherical bearing 60 as shown in FIG. .

As shown in FIG. 24, the spherical bearing 60 includes a bracket 57 of the building structure and a pair of shaft support members 61 fixed to the distal end of the connecting member 52 and arranged on both sides of the bracket 57 so as to sandwich the bracket 57. The shaft support member 61 and the bracket 57 are provided between the shaft support member 63 and both ends thereof are connected to each other so that the shaft support member 61 and the bracket 57 can rotate freely.

That is, the spherical bearing 60 includes a bearing inner ring member 65 having a shaft hole fitted into the shaft member 63 and a convex spherical surface formed on the outer peripheral surface thereof, and the bearing inner ring member having an outer peripheral portion supported by the outer ring supporting member 67 and the inner peripheral surface having the bearing. It is constituted by a bearing outer ring member 69 having a concave spherical surface which can slide on the convex spherical surface of the inner ring member 65.

In the building structure, when an external force such as an earthquake is applied to the hydraulic dampers 30 and 50 in the axial direction as described above, relative movement occurs between the hydraulic cylinder 32 and the piston 36, and the piston moves. A damping force proportional to the pressure difference between the hydraulic chambers 32a and 32b is applied to the end face of the cylinder 36 in a direction opposite to the direction of movement, and the damping forces cause the hydraulic dampers 30 and 50 to perform the damping operation. Can be demonstrated.

By the way, in the first conventional hydraulic damper, as shown in FIG. 21, the holder spherical portions 47, 48 are tightened to the ball support portions 45, 46 by screw members, so that the concave spherical surfaces thereof are formed. The contact between the ball joints 42, 43 and the holder portions 47, 48 can be easily eliminated by bringing the ball joints 42, 43 into contact with the convex spherical surfaces.

However, in the second conventional hydraulic vibration damper 50, as shown in FIG. 24, a contact portion C1 between the shaft member 63 and the bearing inner ring member 65, and a contact portion C1 between the bearing inner ring member 65 and the bearing outer ring member 69 are formed. The contact portion C2, the contact portion C3 between the bearing outer ring member 69 and the outer ring support member 67, and the contact portion C4 between the shaft member 63 and the shaft support member 61 have backlash, and these backlashes accumulate as larger backlash. Works. In addition, the play cannot be easily removed by tightening a screw member or the like, as in the play between the ball joints 42, 43 and the holders 47, 48 of the first conventional hydraulic damper 30. It has become.

If the accumulated large backlash exists like the spherical bearing 60, when the direction of the external force applied to the hydraulic damper 50 in the reciprocating direction is switched to the opposite direction, the bracket 57 and the shaft support are supported by the backlash. During the initial stage of relative displacement between the members 61, no damping force is generated in the hydraulic damper 50.

For this reason, when a small external force, such as a wind sway, having the same amplitude as the accumulated backlash is applied, no damping force is generated in the hydraulic damper 50, so that a person may experience uncomfortable sway. When an external force having a large amplitude such as an earthquake is applied, the energy absorption decreases, and the ability of the hydraulic damper 50 to suppress the external force is lower than that without the backlash. There was a problem of doing it.

Accordingly, the present invention has been made in view of the above problems, and provides a hydraulic damper that can reliably remove backlash between components even when a spherical bearing is used in a connection portion with a building structure. Is the subject.

In order to solve the above problems, the present invention
Hydraulic vibration dampers that use spherical bearings at the connection to the building structure
The outer surface of the bearing outer ring member of the spherical bearing and the inner surface of the outer ring supporting member that contacts the outer surface and supports the bearing outer ring member are formed with tapered shapes corresponding to each other.

As described above, according to the present invention, even when a spherical bearing is used for the connection with the building structure, the play between the members can be reliably removed. Even when a reciprocating external force is applied, the hydraulic vibration damper can generate a damping force from the beginning when the direction is switched, so that it is possible to prevent a person from experiencing unpleasant shaking. In addition, it is possible to prevent the ability of the hydraulic damper to suppress an external force from decreasing in the event of an earthquake or the like.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIGS. 1 to 6 are diagrams referred to for explaining a hydraulic damper according to a first embodiment of the present invention.

As shown in FIG. 1, the spherical bearing 70 used in the connecting portion of the hydraulic damper according to this embodiment is press-fitted so that the shaft member 73 is in close contact with the peripheral surface of the shaft hole of the bearing inner ring member 75. Therefore, the contact portion C1 between the shaft member 73 and the bearing inner ring member 75 is configured such that no backlash occurs.

軸 受 A bearing outer ring member 79 having a concave spherical surface that comes into contact with the convex spherical surface on the outer periphery of the bearing inner ring member 75 has a tapered outer peripheral surface. A tapered shape is formed on the inner peripheral surface of the outer ring support member 77 whose outer peripheral surface is fixed to the bracket 57 by welding so as to contact the tapered shape of the outer peripheral surface of the bearing outer ring member 79.

(3) As shown in FIGS. 3 to 5, the bearing outer ring member 79 is cut by two slits 79a at intervals of approximately 180 degrees in the circumferential direction and is divided into two parts. As shown in FIG. 3, the direction in which the slit 79 a of the bearing outer ring member 79 extends is the direction coinciding with the axial direction of the bearing outer ring member 79.

On the other hand, as shown in FIG. 1, a tapered shape is formed at both ends of the shaft member 73, and a wedge-shaped member 81 having a cross section as shown in the drawing is provided between both ends of the shaft member 73 and the shaft support member 61. Is provided. The wedge-shaped member 81 has slits at one or more positions in the circumferential direction, so that the diameter of the wedge-shaped member 81 can be freely expanded and reduced by an external force applied in a radial direction.

A disc-shaped pressing plate 83 is in contact with an end surface of the wedge-shaped member 81 protruding outward from the shaft supporting member 61, and a screw portion of a bolt 85 inserted from a center hole of the pressing plate 83 is used as a shaft member 73. The wedge-shaped member 81 is hardly inserted between the shaft member 73 and the shaft support member 61 via the pressing plate 83 by being screwed into the screw hole at the center of the shaft member 73.

According to such an embodiment, when the bearing outer ring member 79 between the bearing inner ring member 75 and the outer ring support member 77 is pushed downward in FIG. The member 79 is in close contact with the bearing inner ring member 75 and the outer ring support member 77, so that play at the contact portions C2 and C3 can be reliably removed.

At this time, since the bearing outer ring member 79 is divided into two as shown in FIGS. 3 and 4, the outer peripheral taper surface is pressed inward by the inner peripheral taper surface of the outer ring support member 77 to reduce the diameter. In order to reduce the diameter, the concave spherical surface on the inner periphery can be brought into close contact with the convex spherical surface on the outer periphery of the bearing inner ring member 75.

Further, by tightening the bolt 85, the wedge-shaped member 81 can be hardly inserted between the shaft member 73 and the shaft support member 61 via the pressing plate 83, so that the wedge-shaped member 81 is connected to the shaft support member 61. The contact portions C4 and C5 between the wedge-shaped members 81 and the shaft members 73 can be securely removed.

For this reason, even when a reciprocating external force having a small amplitude such as wind sway is applied, the hydraulic damper 50 can generate a damping force from the beginning when the direction is switched, so that uncomfortable sway is given to a person. It is possible to prevent the user from experiencing it. In addition, it is possible to prevent the ability of the hydraulic damper 50 to suppress the external force from being reduced in the event of an earthquake or the like.

For example, as shown in FIG. 6A, when there is no backlash in each of the contact portions C1 to C5 as in the hydraulic damper according to the above embodiment, the external force is initially switched when the reciprocating direction is switched. As a result, the hydraulic damper 50 can generate a damping force, and the energy absorption E1 represented by the hatched area in the figure does not decrease at all.

On the other hand, when there is play in the spherical bearing 60 of the second conventional example and the respective contact portions C1 to C4 around the same as shown in FIG. 24, reciprocation of the external force is performed as shown in FIG. During the initial switching of the direction between the bracket 57 and the shaft support member 61 by the amount of the play G, the hydraulic vibration damper 50 cannot generate a damping force. The expressed energy absorption E2 will also decrease.

In the above-described embodiment, as shown in FIG. 3, the direction in which the slit 79a of the bearing outer ring member 79 extends matches the direction of the axis of the bearing outer ring member 79, but as shown in FIG. Alternatively, the direction in which the slit 79 b of the bearing outer ring member 79 extends may be oblique to the axis of the bearing outer ring member 79.

Further, in the above-described embodiment, as shown in FIG. 4, the bearing outer ring member 79 is divided into two by two circumferential slits 79a of the bearing outer ring member 79, but as shown in FIG. Alternatively, the bearing outer ring member 79 may be provided with only one slit 79c in the circumferential direction thereof, and in this case, the diameter of the bearing outer ring member 79 can be freely increased or decreased.

FIGS. 9 and 10 are diagrams referred to for explaining a hydraulic damper according to a second embodiment of the present invention.
The spherical bearing 90 according to this embodiment includes a bearing outer ring member 99 having no tapered outer peripheral surface and a bearing inner ring member 75 having a shaft hole that fits into the shaft member 73. A wedge-shaped member 100 is interposed between the bearing outer ring member 99 and the outer ring support member 77, and a tapered shape corresponding to the tapered shape of the inner periphery of the outer ring support member 77 is formed on the outer peripheral surface of the wedge-shaped member 100. Is formed.

As shown in FIG. 10, the tapered portion 100a of the wedge-shaped member 100 in which the tapered shape is formed is provided with the slit 100b at one or more positions in the circumferential direction, so that the diameter thereof can be expanded and contracted. I have. An annular male screw portion 100c integral with the tapered portion 100a is screw-coupled to a female screw at one end of the outer ring support member 77. Further, the diameter of the bearing outer ring member 99 is freely expandable and contractible similarly to the bearing outer ring member 79 of the first embodiment.

According to such an embodiment, by tightening the annular male screw portion 100c of the wedge-shaped member 100, the tapered portion 100a is pushed downward in FIG. 9, and the tapered portion 100a is formed by the bearing outer ring member 99 and the outer ring support member 77. And the backlash of the contact portions C3 and C4 can be reliably removed.

At this time, the outer periphery of the wedge-shaped member 100 is pushed inward by the inner periphery of the outer ring supporting member 77 to reduce the diameter, and therefore, the inner peripheral surface of the wedge-shaped member 100 may be brought into close contact with the outer peripheral surface of the bearing outer ring member 99. it can. Since the outer circumference of the bearing outer ring member 99 is pressed inward by the inner circumference of the wedge-shaped member 100 to reduce its diameter, the inner circumferential surface thereof is brought into close contact with the outer circumferential surface of the bearing inner ring member 75 to make contact. The play of the portion C2 can be reliably removed. In addition, the wedge-shaped member 100 may be configured to be divided into a tapered portion 100a and an annular male screw portion 100c.

Further, by tightening the bolt 85, the wedge-shaped member 81 can be hardly inserted between the shaft member 73 and the shaft support member 61 via the pressing plate 83, so that the wedge-shaped member 81 is connected to the shaft support member 61. The contact portions C5 and C6 between the wedge-shaped members 81 and the shaft members 73 can be securely removed from the contact portions. Further, the shaft member 73 is pressed into the shaft hole of the bearing inner ring member 75, so that the backlash of the contact portion C1 can be surely removed.

Therefore, the second embodiment can provide the same effects as those of the first embodiment.

FIG. 11 is a diagram referred to for describing a hydraulic damper according to a third embodiment of the present invention.
In the above-described embodiment, the tapered shape is formed at both ends of the shaft member 73. On the other hand, the spherical bearing 110 according to the third embodiment includes one of the shaft members 73 (upper part in the drawing). Only at one end, a tapered shape is formed to be in contact with the inner tapered surface of the wedge-shaped member 81, and at the other end, a fitting portion that fits into a hole of the shaft support member 61 below in the figure. 73c, and a flange portion 73d having a larger diameter than the fitting portion 73c are formed outside of the flange portion 73c.

According to the spherical bearing 110 having such a configuration, a total of two wedge-shaped members 81 that come into contact with the tapered surfaces at both ends of the shaft member 73 are required in the above-described embodiment. In the embodiment, since only one wedge-shaped member 81 is required to be in contact with the tapered shape at one end of the shaft member 73, the number of parts can be reduced and cost can be reduced.

Further, in the above-described embodiment, since the tapered shape is formed at both ends of the shaft member 73, it is somewhat difficult to align the shaft member 73 with the pair of shaft support members 61. However, in the third embodiment, the fitting portion 73c at the end of the shaft member 73 where the tapered shape is not formed is fitted into the hole of the one shaft support member 61 in the third embodiment. Then, just by abutting the flange portion 73d against the shaft support member 61 from the outside, the positioning of the shaft member 73 with respect to the shaft support member 61 can be easily performed, so that the assembly of these members is also facilitated.

FIGS. 12 to 20 are schematic diagrams showing various types of tapered portions T when tapered portions T are formed on one or both (at least one) of the shaft member 73 and the shaft supporting member 61. FIG.

In the type shown in FIG. 12, tapered portions T are formed at upper and lower ends 73a and 73b of the shaft member 73 in the drawing, and tapered portions T are formed at both upper and lower members 61a and 61b of the shaft supporting member 61 in the drawing. This type does not correspond to the first and second embodiments of the present invention.

In the type shown in FIG. 13, a tapered portion T is formed at an upper end 73 a of the shaft member 73 in the figure, and both a lower end 73 b of the shaft member 73 in the figure and an upper and lower part of the shaft support member 61 in the figure. The members 61a and 61b have no tapered portion T, and this type corresponds to the second embodiment of the present invention.

In the type shown in FIG. 14, the shaft member 73 has upper and lower ends 73a and 73b in the figure and a shaft support member 61 formed with a tapered portion T in an upper part 61a in the figure, and a lower part of the shaft support member 61 in the figure. The member 61b has no tapered portion T.

The type shown in FIG. 15 is such that tapered portions T are formed on both upper and lower ends 73a and 73b of the shaft member 73 in the drawing and both upper and lower members 61a and 61b of the shaft support member 61 in the drawing.

The type shown in FIG. 16 has a tapered portion T formed at an upper end 73a of the shaft member 73 in the drawing and an upper member 61a of the shaft support member 61 in the drawing, and a lower end of the shaft member 73 in the drawing. The tapered portion T is not formed in the portion 73b and the member 61b below the shaft support member 61 in the drawing.

In the type shown in FIG. 17, a tapered portion T is formed on an upper end 73a of the shaft member 73 in the figure and a lower member 61b of the shaft support member 61 in the figure. The tapered portion T is not formed in the portion 73b and the member 61a above the shaft support member 61 in the figure.

In the type shown in FIG. 18, the upper end 73a of the shaft member 73 in the figure and the upper and lower members 61a and 61b of the shaft support member 61 in the figure are formed with tapered portions T. The tapered portion T is not formed at the lower end 73b.

In the type shown in FIG. 19, a taper portion T is formed in a member 61a in the upper part of the shaft support member 61 in the figure, and a lower member 61b in the figure of the shaft support member 61 and upper and lower ends of the shaft member 73 in the figure. The tapered portions T are not formed in 73a and 73b.

In the type shown in FIG. 20, tapered portions T are formed on both upper and lower members 61a and 61b of the shaft support member 61 in the drawing, and no tapered portions T are formed on both upper and lower ends of the shaft member 73 in the drawing. Things.

In addition to these types, in detail, there may be included those obtained by inverting the above-mentioned FIGS. 13, 16, and 17, but in any case, all the types mentioned above are included in the present invention. is there.

It is a sectional view showing the connection structure of the hydraulic damper concerning a 1st embodiment of the present invention. It is sectional drawing of the bearing outer ring member 79 and the bearing inner ring member 75 in FIG. FIG. 3 is a side view of a bearing outer ring member 79 and a bearing inner ring member 75 in FIG. 2. FIG. 4 is a view of a bearing outer ring member 79 and a bearing inner ring member 75 in FIG. FIG. 5 is an exploded view of a bearing outer ring member 79 and a bearing inner ring member 75 in FIG. 4. FIG. 6A is a characteristic diagram showing the amount of energy absorption based on the relationship between the damping force of the hydraulic vibration damper and the relative displacement between the hydraulic cylinder 32 and the piston 36. FIG. 6A shows no play in the connection portion of the hydraulic vibration damper. FIG. 6B is a characteristic diagram when there is a backlash in the connection portion. It is a figure showing other examples of a hydraulic damper concerning a 1st embodiment of the present invention. It is a figure showing other examples of a hydraulic damper concerning a 1st embodiment of the present invention. It is sectional drawing which shows the connection structure of the hydraulic damper which concerns on 2nd Embodiment of this invention. It is a side view of the wedge-shaped member 100 in FIG. It is sectional drawing which shows the connection structure of the hydraulic damper which concerns on 3rd Embodiment of this invention. It is a schematic diagram which shows one type of the formation state of one or both taper parts T of the shaft member 73 and the shaft support member 61. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is also a schematic diagram showing one type of the formation state of the tapered portion T. It is sectional drawing which shows the 1st conventional hydraulic damper 30. It is a figure showing the state where the 2nd conventional hydraulic damper 50 was provided in the building structure. FIG. 23 is an enlarged view of a connecting portion between the connecting member 52 and the bracket 57 in FIG. 22. FIG. 24 is an enlarged cross-sectional view showing a structure of a connecting portion between a connecting member 52 and a bracket 57 in FIG. 23.

Explanation of reference numerals

Reference Signs List 30 Hydraulic vibration damper 32 Hydraulic cylinder 32a, 32b Hydraulic chamber 34 Piston rod 36 Piston 40 Control valve part 40a Control valve 42,43 Ball joint 45,46 Ball support part 47,48 Holder part 50 Hydraulic vibration damper 52 Connection Member 57, 58 Bracket 60 Spherical bearing 61 Shaft support member 63 Shaft member 65 Bearing inner ring member 67 Outer ring support member 69 Bearing outer ring member 70 Spherical bearing 73 Shaft member 75 Bearing inner ring member 77 Outer ring support member 79 Bearing outer ring member 79a to 79c Slit 81 Wedge-shaped member 83 Pressing plate 85 Bolt 87 Annular male screw part 90 Spherical bearing 99 Bearing outer ring member 100 Wedge-shaped member 100a Tapered part 100b Slit 100c Annular male screw part C1-C6 Contact part

Claims (6)

Hydraulic vibration dampers that use spherical bearings at the connection to the building structure
A hydraulic pressure characterized by forming tapered shapes corresponding to both the outer surface of a bearing outer ring member of the spherical bearing and the inner surface of an outer ring support member that contacts the outer surface and supports the bearing outer ring member. Type vibration damper. Hydraulic vibration dampers that use spherical bearings at the connection to the building structure
An outer surface of a bearing outer ring member of the spherical bearing, and a tapered shape formed on one of inner surfaces of an outer ring support member that contacts the outer surface and supports the bearing outer ring member,
A hydraulic damper characterized in that a wedge-shaped member having a tapered shape corresponding to the tapered shape is provided between an outer surface of the bearing outer ring member and an inner surface of the outer ring supporting member. 3. The hydraulic vibration damper according to claim 1, wherein the bearing outer ring member is divided by a slit extending in the axial direction or a slit extending in a direction oblique to the axial direction. The hydraulic damper according to claim 1, wherein a slit extending in an axial direction of the outer ring member or in an oblique direction with respect to the axial direction is formed at one circumferential position of the outer ring member. A shaft member that fits into a shaft hole of the bearing inner ring member of the spherical bearing, and a shaft support member that supports the shaft member, at least one of which has a tapered shape, between the shaft member and the shaft support member. The hydraulic damper according to claim 1 or 2, wherein a wedge-shaped member having a tapered shape corresponding to the tapered shape is interposed. 3. The hydraulic vibration damper according to claim 1, wherein a shaft member fitted into a shaft hole of a bearing inner race member of the spherical bearing is press-fitted into the shaft hole.

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