JP2004116552A - Damping damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate handling and installing work by reducing a size of an outer diameter and reducing an entire weight. <P>SOLUTION: In this vibration control damper, a base end of a piston rod 2 projecting from a head end 1a of a cylinder body 1 is coupled to an opposite part as another part, in a spherical surface bearing structure. In this vibration control damper, the spherical surface bearing structure includes: a base plate 11 coupled to the opposite part; a spherical surface body 12 rotatably seated on the base plate 11; and a cover member 13 for seating the spherical surface body 12 onto the base plate 11. A male screw part S2 formed to the base end of the piston rod 2 is threadedly engaged to a female screw part S12 formed to the spherical surface body 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vibration damper, and more particularly, to an improvement of a vibration damper used for, for example, building vibration control.
[0002]
[Prior art and its problems]
In recent years, there have been many proposals on building damping for minimizing earthquake damage in buildings such as buildings and structures, and there have been many proposals on damping dampers used for this building damping.
[0003]
For example, Japanese Patent Application Laid-Open No. 9-158529 discloses a vibration damper in which both ends of the damper are connected to an opposing portion under a spherical bearing structure. Therefore, it may be pointed out that it is difficult to reduce the outer diameter and reduce the overall weight of the vibration damper.
[0004]
That is, if this type of damping damper is connected to a brace which is a diagonal member for improving rigidity of a wall constituting a building, for example, this damping damper is often also used as a brace. And will be located in the wall.
[0005]
Therefore, it is preferable that this type of vibration damper is formed so as to be as thin as possible in outer diameter, and is formed as light as possible to facilitate handling and installation work. Will be.
[0006]
However, in the vibration damper disclosed in the above-mentioned publication, since “the piston-side ball stud 9 is screwed to the rear end of the piston 3”, the “piston 3” and the “piston-side ball stud 9” Will depend on the so-called neck thickness of the "ball stud 9".
[0007]
Therefore, the cross section of the piston rod, which is the “piston 3”, into which the “ball stud 9” is screwed, is formed thicker so as to be larger than the cross section of the neck of the “ball stud 9”. Thus, the "cylinder body 1" is also formed to be thick.
[0008]
As a result, in the proposal disclosed in the above-mentioned gazette, it is difficult to reduce the outer diameter and the overall weight of the vibration damper, and there is a fear that improvement in versatility cannot be expected.
[0009]
[Patent Document 1]
JP-A-9-158529 (paragraph 0008 in the specification)
The present invention has been made in view of such a current situation, and its purpose is to facilitate the handling and installation work by enabling the outer diameter to be reduced and the overall weight to be reduced, An object of the present invention is to provide a vibration damper that is optimal for expecting an improvement in versatility.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, one configuration of the vibration damper according to the present invention is configured such that a base end of a piston rod protruding from a head end of a cylinder body is connected to an opposing portion under the spherical bearing structure. A damping damper comprising: a base plate having a spherical bearing structure connected to an opposing portion; a spherical body rotatably seated on the base plate; and a cover body for seating the spherical body on the base plate. It is assumed that a male screw formed on the base end of the piston rod is screwed into a female screw formed on the body.
[0011]
In addition, in two, in a vibration damper in which the tip of a rod portion protruding from a shaft core portion of a bottom member that closes a bottom end of a cylinder body is connected to an opposing portion serving as another portion under a spherical bearing structure. A base plate having a spherical bearing structure connected to the facing portion, a spherical body rotatably seated on the base plate, and a cover body for seating the spherical body on the base plate. It is assumed that a male screw part formed at the tip of the rod part is screwed to the screw part.
[0012]
And three, the base end side of the piston rod that is inserted through the piston so as to be able to protrude and retract through the piston protrudes outside through the shaft core of the sealing member that seals the head end of the cylinder body. On the other hand, the distal end side of the piston rod opposite to the piston is disposed inside the bottom end side of the cylinder body, and penetrates the shaft core of the partition member that defines the pressure side oil chamber in the cylinder body. The rod end protruding from the shaft core of the bottom member that closes the bottom end of the cylinder body has an accumulator for oil temperature compensation while being present on the shaft core on the bottom end side of the body. In a vibration damper connected to an opposing portion as another portion under a bearing structure, a base plate having a spherical bearing structure connected to the opposing portion, a spherical body rotatably seated on the base plate, and a sphere And a cover body for seating the body on the base plate, and a male screw part formed at the tip of the rod part is screwed into a female screw part formed on the spherical body, while being attached to the shaft core part of the bottom member. The opened hole and the hole opened at the center of the sealing member that closes the bottom end of the accumulator are positioned on a straight line, and the tip constitutes an accumulator in the hole positioned on the straight line. It is assumed that a gauge rod contacting the back surface of the free piston can be inserted.
[0013]
In each of the above-described configurations, more specifically, it is assumed that a pair or a plurality of pairs of chamfers are formed on the spherical body.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on the illustrated embodiment. In a vibration damper according to the present invention, as shown in FIG. 1, a piston rod 2 projecting from a head end 1a of a cylinder body 1 is used. It is stated that the base end is connected to another facing portion (not shown) under the spherical bearing structure.
[0015]
By the way, in this vibration damper, the extension oil chamber R1 and the compression oil chamber R2 are defined in the cylinder body 1 by the piston 3 slidably accommodated in the cylinder body 1, The side oil chamber R1 and the pressure side oil chamber R2 are connected to each other via the damping valve 4.
[0016]
Therefore, in this vibration damper, even when the input direction from the opposing portion is inclined with respect to the expansion and contraction direction of the vibration damper, it is possible to expect the smooth expansion and contraction operation to be realized by the spherical bearing structure. Will be.
[0017]
Then, in this vibration damper, a predetermined magnitude of damping force is generated by the damping valve 4 during the expansion and contraction operation in which the piston rod 2 extends and retracts with respect to the cylinder body 1.
[0018]
The damping valve 4 is arranged outside the cylinder body 1 in a bypass passage L that connects the expansion-side oil chamber R1 and the compression-side oil chamber R2, as shown in FIG. If not, it may be arranged, for example, in the above-mentioned piston 3 instead of this, although not shown.
[0019]
On the other hand, this damping damper is formed in a so-called double rod type as shown in the figure, and a base rod on the right side in the drawing of a piston rod 2 which is inserted into a cylinder body 1 via a piston 3 so as to be retractable. It is described that the end side penetrates the shaft core of the sealing member 5 that seals the head end 1a, which is the right end in the drawing of the cylinder body 1, and projects outside.
[0020]
The spherical bearing structure for connecting the base end of the piston rod 2 to the opposing portion as another portion includes a base plate 11 connected to the opposing portion, a spherical body 12 rotatably seated on the base plate 11, And a cover body 13 for seating the body 12 on the base plate 11, and a male screw part S 2 formed on the base end of the piston rod 2 is screwed into a female screw part S 12 formed on the spherical body 12. .
[0021]
Therefore, in this vibration damper, since the base end of the piston rod 2 is screwed so as to be inserted into the spherical body 12, the shear strength of the piston rod 2 is determined by the cross-sectional area of the piston rod 2. It can be set.
[0022]
As a result, in comparison with the conventional vibration damper described above, in which the external thread formed on the neck of the ball stud is screwed so as to be inserted into the piston rod, in this vibration damper, It is sufficient to secure the necessary minimum thickness of the piston rod 2, and it is possible to prevent the piston rod 2 from having an unnecessarily large diameter.
[0023]
Incidentally, in order to screw the male screw portion S2 at the base end of the piston rod 2 to the female screw portion S12 of the spherical body 12, the base end of the piston rod 2 is screwed into the spherical body 12 in a state where rotation is prevented. Alternatively, it is sufficient to screw the spherical body 12 to the base end of the piston rod 2 in a state where the rotation is prevented.
[0024]
For this purpose, as shown in the figure, a pair of chamfers 12a are formed on the spherical body 12 as shown, or a plurality of pairs of chamfers 12a (not shown) are formed, and by using the chamfers 12a, the spherical body 12 is formed. It is stated that rotation can be prevented or the piston rod 2 can be screwed to the proximal end.
[0025]
Next, in this vibration damper, the left end side in the drawing opposite to the piston rod 2 of the piston rod 2 is disposed inside the bottom end 1b side of the cylinder body 1 on the left side in the drawing. The cylinder body 1 penetrates the shaft core of the partition wall member 6 defining the pressure-side oil chamber R2 in the cylinder body 1 and is located inside the shaft core on the bottom end 1b side of the cylinder body 1 for oil temperature compensation. It has an accumulator.
[0026]
At this time, the accumulator has a free piston 21 having a front end side of the piston rod 2 as a housing, and an oil chamber R defined by the free piston 21 is opened to the piston 3 through a passage (not shown). ) Communicates with the extension-side oil chamber R1 and the compression-side oil chamber R2.
[0027]
As shown in FIG. 2, the accumulator has a rear chamber A defined by a free piston 21 for accommodating the biasing spring 22 and communicating with the outside. Thus, the position of the free piston 21 can be detected.
[0028]
That is, the rear chamber A is basically sealed by the sealing member 23 which also serves as a spring receiver that carries the rear end of the urging spring 22 that urges the free piston 21 from behind. It is described that the shaft core of the sealing member 23 communicates with the outside through an opening 23a.
[0029]
The hole 23a opened in the sealing member 23, that is, the hole 23a opened in the accumulator is aimed at the hole 7b opened in the shaft core of the rod 7a in the vibration damper. That is, they are positioned on a straight line.
[0030]
Therefore, in this vibration damper, when the oil temperature rises and the oil amount in each of the oil chambers R1 and R2 on the extension side and the compression side increases, the increased oil is stored in the accumulator. Will be able to do it.
[0031]
In addition, in this damping damper, as shown in FIG. 2, the above-mentioned holes, ie, the holes 7b formed in the rod portion 7a and the holes formed in the sealing member 23 which are aimed at the holes, are formed. The gauge rod 8 can be inserted through 23a.
[0032]
By inserting the gauge rod 8 into the holes 7b and 23a, the position of the free piston 21 in the accumulator, that is, each of the extension side and the pressure side communicating with the oil chamber R defined by the free piston 21 is provided. The amount of oil in the oil chambers R1 and R2 can be confirmed.
[0033]
Incidentally, at this time, as shown in FIG. 1, the female screw portion S12 formed on the spherical body 12 constituting the spherical bearing structure is screwed to the male screw portion S7 at the tip of the rod portion 7a.
[0034]
However, since the above-described operation for confirming the position of the free piston 21 is performed at the time of assembling the vibration damper, as shown in FIG. 2, the operation is performed in a state where the spherical bearing structure is not connected. Would.
[0035]
When the bottom member 7 is screwed to the cylinder body 1 with the intervention of the cylindrical spacer 6a, the partition member 6 is pressed against the step 1c formed on the inner periphery of the cylinder body 1. It is fixed at a predetermined position of the cylinder body 1.
[0036]
By the way, in this vibration damper, the tip of the rod 7a protruding from the shaft core of the bottom member 7 that closes the bottom end 1b of the cylinder body 1 also faces the other part under the spherical bearing structure. It is said to be linked.
[0037]
At this time, this spherical bearing structure has a base plate 11, a spherical body 12, and a cover body 13 similarly to the above-described spherical bearing structure on the piston rod 2 side. It is said to be screwed so that the tip is inserted.
[0038]
Therefore, in the rod portion 7a, the shear strength at the rod portion 7a may be set from the cross-sectional area of the rod portion 7a. As a result, in the vibration damper, It is possible to prevent the weight of the bottom member 7 having 7a from being unnecessarily increased.
[0039]
Incidentally, in this spherical bearing structure, a hole 12b (see FIG. 1) is formed in the axis of the spherical body 12 so as to be aimed at the holes 7b and 23a, and a hole is formed in the axis of the base plate 11. When drilling the hole 11a (see FIG. 2), even after connecting the rod portion 7a to the spherical bearing structure, the position of the free piston 21 using the gauge rod 8 can be confirmed. It is also possible to subsequently confirm the excess or deficiency of the oil amount in each of the oil chambers R1 and R2 on the extension side and the compression side.
[0040]
The hole 11a formed in the shaft core of the base plate 11 is preferably sealed with a sealing plug 11b thereafter to prevent dust from entering.
[0041]
The sealing with the sealing plug 11b is the same in the spherical bearing structure on the piston rod 2 side shown on the right side in FIG. 1, and the sealing provided on the shaft core of the base plate 11. When sealing the hole 12b in the axial core of the spherical body 12 with the stopper 11b, lubricating oil can be stored in the hole 12b in the spherical body 12.
[0042]
According to the above description, in the vibration damper according to the present invention, since the diameter of the piston rod 2 can be reduced, the overall diameter can be reduced and the overall weight can be reduced. This makes it possible to improve the performance and ease of installation work.
[0043]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the base end of the piston rod is screwed so as to be inserted into the spherical body constituting the spherical bearing structure, the shear strength of the piston rod is Can be set from the cross-sectional area of.
[0044]
Therefore, in comparison with the conventional damping damper, in which the neck of the ball stud is screwed so as to be inserted into the piston rod, the required minimum thickness of the piston rod is secured in this damping damper. By doing so, it is possible to prevent a mischievous increase in the diameter of the piston rod.
[0045]
According to the second aspect of the present invention, since the tip of the rod portion of the bottom member sealing the bottom end of the cylinder body is screwed so as to be inserted into the spherical body constituting the spherical bearing structure. The shear strength of the portion can be set from the cross-sectional area of the rod portion, and in this vibration damper, it is possible to prevent the bottom member having the rod portion from unnecessarily increasing the weight.
[0046]
According to the third aspect of the present invention, when the oil temperature increases, the amount of oil in each of the expansion-side and pressure-side oil chambers defined by the piston in the cylinder body increases. Oil could be stored in this accumulator.
[0047]
Then, in this damping damper, the position of the free piston in the accumulator, that is, the position of the free piston by inserting a gauge rod through the hole drilled in the rod part and the hole drilled in the accumulator which is aimed at the rod part, It is possible to confirm the oil amount in each of the oil chambers on the extension side and the compression side communicating with the oil chamber defined by the above.
[0048]
Furthermore, in the invention of claim 4, the rotation of the spherical body can be prevented or the piston rod can be screwed to the base end by using one or a plurality of pairs of chamfers of the spherical body.
[0049]
As a result, according to the present invention, the outer diameter can be reduced and the overall weight can be reduced, thereby facilitating handling and installation work, and is most suitable for expecting improvement in versatility.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view partially showing a vibration damper according to the present invention in a front view.
FIG. 2 is an enlarged longitudinal sectional view showing a bottom end side of the vibration damper according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder body 1a Head end 1b Bottom end 1c Step 2 Piston rod 3 Piston 4 Damping valve 5, 23 Sealing member 6 Partition member 6a Spacer 7 Bottom member 7a Rod portions 7b, 11a, 12b, 23a Hole 8 Gauge rod 11 Base plate 12 Spherical body 13 Cover member 21 Free piston 22 Energizing spring A Back chamber L Bypass path R Oil chamber R1 Expansion-side oil chamber R2 Pressure-side oil chamber S2, S7 Male thread S12 Female thread

Claims (4)

In a damping damper in which a base end of a piston rod protruding from a head end of a cylinder body is connected to an opposing portion as another portion under a spherical bearing structure, a base plate having a spherical bearing structure connected to the opposing portion, and It has a spherical body rotatably seated and a cover body for seating the spherical body on a base plate, and a female screw part formed on the spherical body is screwed with a male screw part formed on the base end of the piston rod. Damper characterized by being made In a damping damper in which a tip end of a rod portion protruding from a shaft core portion of a bottom member for closing a bottom end of a cylinder body is connected to a facing portion serving as another portion under a spherical bearing structure, the spherical bearing structure has a facing portion. A base plate connected to the base plate, a spherical body rotatably seated on the base plate, and a cover body for seating the spherical body on the base plate. Damper characterized by screwing a male thread formed on the damper While the base end side of the piston rod that is inserted into and retractable from the cylinder via the piston projects outside through the shaft core of the sealing member that seals the head end of the cylinder, the piston is sandwiched. The opposite end of the piston rod is disposed inside the bottom end side of the cylinder body and penetrates the shaft core of the partition member that defines the pressure-side oil chamber in the cylinder body. While having an accumulator for oil temperature compensation inside while being present in the core portion, the tip of a rod portion protruding from the shaft core portion of the bottom member closing the bottom end of the cylinder body is another portion under the spherical bearing structure. In a vibration damper connected to an opposing portion, a base plate having a spherical bearing structure connected to the opposing portion, a spherical body rotatably seated on the base plate, and And a male screw part formed at the tip of the rod part is screwed into a female screw part formed on the spherical body, and a cover is formed in the shaft core part of the bottom member. The hole and the hole formed in the center of the sealing member that closes the bottom end of the accumulator are positioned in a straight line, and the tip of the free piston that forms the accumulator in the hole positioned on the straight line. A vibration damper characterized in that a gauge rod contacting the back surface can be inserted therethrough. 4. The vibration damper according to claim 1, wherein a pair or a plurality of pairs of chamfers are formed on the spherical body.

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