JP2003148558A - Separation-type shock mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in a conventional shock mount that the strength in the tensile direction is weak, so that it is difficult to arbitrarily determine an elastic constant. SOLUTION: This separation-type shock mount comprises a first member 1 having a first male screw part 11 and a head part 13 of a large diameter, a second member 2 having a second male screw part 12, and a third member connected to the second member 2 in a state of being penetrated through the first male screw part 11, and accommodating the head part 13 with respect to the second member 2, and buffer materials 14A, 14B, 16A, 16B are axially installed between the head part of the first member and the second and third members, whereby the sufficient mechanical strength can be secured, and the elastic constant can be freely determined by easily changing a thickness and the like of the buffer materials 14A, 14B, 16A, 16B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separable shock mount used for supporting various devices in a state where a vibration isolation function is added to a predetermined structure.

[0002]

2. Description of the Related Art As a conventional shock mount, for example, there is one shown in FIG. The illustrated shock mount 100 includes two metal bolts 102 and 102 having a disk-shaped head 101 and a rubber cushioning material 103, and the two bolts 102 and 102 are arranged in opposite directions. , 101 has a structure in which a cushioning material is adhesively fixed.

In the shock mount 100, one bolt 102 is connected to a predetermined structure, and the other bolt 102 is connected to various devices to support the devices in the structure. The material 103 vibrates in a one-degree-of-freedom system, so that the material 103 has a function of attenuating a vibration having a frequency higher than a resonance frequency determined by the elastic constant of the cushioning material 103 and the weight of supported devices.

[0004]

However, in the conventional shock mount described above, since the rubber shock absorbing material is fixed to the metal bolt 102 by adhesion, the strength in the pulling direction is particularly weak. There was a problem. Further, in order to set the elastic constant according to the weight of the equipment to be supported, the diameter and thickness of the cushioning material 103 are changed. In this case, the elastic constant ratio in the compression / shear direction is large and this Since the ratio cannot be changed largely, the degree of freedom in design is small, and further, the size of the bolt 102 and the like need to be changed significantly, and as a result, it is difficult to freely set the elastic constant. However, the problem was to solve these problems.

[0005]

The present invention has been made by paying attention to the above-mentioned conventional problems. It has sufficient strength and can obtain a large damping function against vibrations, and also can set the elastic constant. It is an object of the present invention to provide a separable shock mount that can be easily dealt with.

[0006]

The separable shock mount according to the present invention is, as claim 1, a separable shock mount provided with a first male screw portion and a second male screw portion in coaxially opposite directions. Then, a first member having a first male screw portion and a head having a larger diameter than the male screw portion, a second member having a second male screw portion, and a first male screw portion of the first member are penetrated. In the state of being connected to the second member, and between the first member and the second member.
A third member for accommodating the head of the member, wherein a cushioning material is interposed between the head of the first member and the second and third members in the axial direction, and the second member according to claim 2. The third member and the third member are connected by screw connection, and a spacer for adjusting the screwing amount of each other is interposed between the second member and the third member. The axially facing surfaces of the head and at least one of the second and third members are tapered,
The above configuration is used as means for solving the conventional problems.

In the above structure, the first, second and third members may be made of metal or plastic as the material, and the cushioning material may be made of rubber or resin. You can

[0008]

In the separable shock mount according to the first aspect of the present invention, the first member and the second member having the first male screw portion are provided.
The second member having the male screw portion is not directly connected but separated, and the first male screw portion and the second male screw portion are coaxially opposed to each other. Then, for example, the second male screw portion is connected to a predetermined structure, the first male screw portion is connected to various devices, and the devices are supported in the structure. At this time, the head of the first member is connected. The cushioning material interposed between the first and second and third members in the axial direction damps the vibration of the devices supported in the structure.

In this separable shock mount, the head of the first member is housed between the second member and the third member, and the head is locked with respect to the third member. The mechanical strength is very high with respect to the connection using the second male screw portion, and the cushioning material is housed between the second member and the third member. Since it is not necessary to fix the first to third members by adhesion or the like, the function of damping the vibration by the cushioning material is further enhanced, and the situation in which the cushioning material is broken is prevented. Furthermore, the elastic constant is set by changing the width, thickness, or material of the cushioning material.

In the separable shock mount according to the second aspect of the present invention, the second member and the third member are connected by screw connection, and the spacer can be interposed between the second member and the third member. Therefore, when the thickness of the cushioning material is changed in setting the elastic constant, the second member and the third member are corresponding to the thickness.
The amount of screwing of the members to each other is adjusted so that the spacer is interposed in the gap formed between the second member and the third member.

In the separable shock mount according to claim 3 of the present invention, since the axially opposed surfaces of the head of the first member and at least one of the second and third members are tapered, The damping function for vibrations in the axial direction and the direction orthogonal to the axial line is further enhanced, and the vibration energy can be absorbed even by the slip generated on the tapered surface, so that a larger damping function is obtained.

[0012]

According to the separable shock mount according to claim 1 of the present invention, since the first to third members and the cushioning material are used, the assembly is very simple and the space between the pair of bolts is very simple. Compared with a conventional shock mount that has a cushioning material interposed between them, it is possible to obtain extremely high mechanical strength, and it is possible to obtain a large damping function against vibration while being small in size. In addition to preventing the above problem, it is possible to deal with the setting of the elastic constant accompanied by the change of the width and thickness of the cushioning material very easily.

According to the separable shock mount according to the second aspect of the present invention, the same effect as that of the first aspect can be obtained, and the second and third members are screwed together and the spacer is interposed. By making it possible, without changing the shape or size of the shock mount,
The distance between the axial direction between the head of the member and the second and third members and the thickness of the cushioning material can be freely changed,
Thus, the elastic constant can be set more easily, and the spacer can surely maintain the connected state of the second and third members after the change.

According to the separable shock mount according to the third aspect of the present invention, the same effects as those of the first and second aspects can be obtained, and the head of the first member and the second and third members are obtained. Since the surface opposed to at least one of them in the axial direction is tapered, the damping function for vibrations in two directions, the axial direction and the direction orthogonal to the axial line, can be improved without changing the shape or size. In addition, it is possible to obtain a larger damping function by the slip generated on the tapered surface, and the elastic constant can be changed by changing the taper angle, so that the degree of freedom in design can be further enhanced. it can.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the separable shock mount according to the present invention will be described below with reference to the drawings.

The separable shock mount S1 shown in FIGS. 1 and 2 has a first male screw portion 11 and a first member 1 having a head portion 13 having a diameter larger than that of the male screw portion 11, and a second male screw portion. 1
A second member 2 having 2 and a first male screw part 1 of the first member 1.
3 in which the head portion 13 of the first member 1 is housed between the second member 2 and the second member 2 while the first member 1 is in a penetrating state.
The member 3 is provided. The first to third members 1 to 3 are all made of metal.

The head 13 of the first member 1 is provided with two taper surfaces 13A, 13B on the first male threaded portion 11 side and its opposite side in the axial direction, the diameters of which gradually decrease in the opposite directions. Has been formed. An annular rubber-made cushioning material 14 is formed on both tapered surfaces 13A and 13B.
A and 14B are fixed by adhesion.

The head of the second member 2 is integrally formed with a segment 15 for forming a housing space. This segment 15 is concentric with a flange portion 15A forming a mounting surface to a predetermined structure (not shown), a connecting portion 15C formed with a screw 15B on the outer periphery, and a concave portion 15D opening to the head side in the connecting portion 15C. Be prepared for. This recess 15D
Has an inner peripheral surface which is a tapered surface 15E whose diameter gradually decreases toward the bottom, and an annular rubber cushioning material 16B is fixed to the tapered surface 15E by adhesion.

The third member 3 is a member having a substantially cylindrical shape, and has an internal thread 3A on the inner peripheral surface on one end side which is the right side in FIG.
And a tapered portion 3B having a diameter gradually decreasing toward the end portion on the other end side. Further, at the center of the tapered portion 3B, an insertion hole 3C that is larger than the diameter of the first male screw portion 11 of the first member 1 and smaller than the diameter of the head portion 13 is provided, and the inside of the tapered portion 3B is An annular rubber cushioning material 16A is fixed to the tapered surface 3D by adhesion.

Here, the cushioning materials 14A and 14B provided on the head portion 13 of the first member 1 have a rectangular cross section, whereas the second and third members 2 and 3 have a rectangular cross section. The cushioning members 16A and 16B provided in the above are formed in a sheet shape whose cross section is larger in width and smaller in thickness than that of the head portion 13.

In the first to third members 1 to 3, the first male threaded portion 11 of the first member 1 is inserted from the inside of the third member 3 into the insertion hole 3C, and then the second member 2 is formed. The third member 3 is screwed by the male screw 15D and the female screw 3A, and the head 13 of the first member 1 is housed between the second member 2 and the third member 3. Thus, the separate shock mount S1
Is very simple to assemble, and after the assembly, the cushioning materials 14A, 14B, 16A and 16B are provided between the head portion 13 of the first member 1 and the second and third members 2 and 3 in the axial direction. It will be in an intervening state.

At this time, the separate shock mount S
In 1, the opposing surfaces of the first member 1 and the second member 2 in the axial direction are tapered surfaces 13B and 15E, and the cushioning materials 14B and 16B contact each other at the same taper angle between them.
Further, the surfaces of the first member 1 and the third member 3 which face each other in the axial direction are tapered surfaces 13A and 3D, and the cushioning materials 14A and 16A are in contact with each other at the same taper angle between them.

Further, the cushioning materials facing each other are not adhered to each other and are in contact with each other without being applied with a pressure. In order to obtain such a state, it is sufficient to adjust the screwing amounts of the second member 2 and the third member 3 with each other, and in order to maintain the screwed position, the flange portion 15A of the second member 2 is maintained.
An annular spacer 17 is interposed between and the end of the third member 3.

In the separable shock mount S1 having the above structure, the first male screw portion 11 and the second male screw portion 12 are in a state where the first member 1 and the second member 2 are separated without being directly connected.
Are oriented in opposite directions on the same axis. Further, in the separable shock mount S1, the second member 2 and the third member 3 are connected by screw connection, and the head 13 of the first member 1 is the third member 3.
With respect to the connection using the first and second external threaded portions 11 and 12, for example, the threaded connection portion is not damaged unless an extremely large external force is applied to break the threaded connection portion. The mechanical strength is extremely high.

Then, the above-mentioned separated shock mount S
1, for example, the second male screw portion 12 is connected to a predetermined structure, the first male screw portion 11 is connected to various devices,
Supporting devices in the structure, cushioning materials 14A, 14
B, 16A, 16B damp vibrations of a frequency higher than the resonance frequency determined by the elastic constant and the weight of the supported equipment.

At this time, the separated shock mount S1
Together with the head 13 of the first member 1 is a cushioning material 14A, 14
Since B, 16A, and 16B are also housed between the second member 2 and the third member 3, when the shock is applied, the cushioning material 14A,
14B, 16A and 16B do not break, and
Since it is not necessary to fix the opposing cushioning materials 14A, 14B, 16A, 16B to each other by adhesion or the like, slipping occurs between the cushioning materials 14A, 14B, 16A, 16B due to non-adhesion to absorb the vibration energy. It has a greater damping function.

Further, in the separable shock mount S1, the cushioning materials 14A, 14B, 16A and 16B are attached to the tapered surface 13.
Since they are provided in A, 13B, 3D, and 15E, the damping function for vibration in the axial direction and the direction orthogonal to the axial line is further enhanced, and the cushioning materials 14A, 14B, 16 facing each other are provided.
Since A and 16B are in contact with each other on the tapered surface, slippage between them is more likely to occur and a greater damping function is brought about.

Further, in the separable shock mount S1, the second member 2 and the third member 3 are connected by screw connection, and the spacer 17 can be interposed between the second member 2 and the third member 3. Therefore, it is apparent that by preparing a plurality of spacers 17 having different width dimensions, it is possible to easily cope with the change of the thickness of the cushioning materials 14A, 14B, 16A, 16B for setting the elastic constant. .

In the separable shock mount S1 of the above embodiment, the third member 3 and the cushioning material 16A and the second member 2 and the cushioning material 16B may not be adhered to each other. In this case, the sliding surface is increased. Therefore, a larger damping function can be obtained. It is also effective to apply grease to the sliding surface to make it more slippery and enhance the damping function. In this case, the assemblability is further improved,
Moreover, the durability of the cushioning materials 14A, 14B, 16A, 16B is also improved. Further, it is of course possible to adopt a configuration in which the cushioning materials 16A and 16B are not provided on the second and third members 2 and 3 side.

FIG. 3 is a diagram showing the vibration characteristics of the separable shock mount S1 described in the above embodiment. As shown in FIG. 3C, the vibration characteristic is that the dummy weight W having a weight of 10 kg is supported on the substrate B by the four separate shock mounts S1, and the vertical direction (vertical direction) and the horizontal direction (horizontal direction). (Direction) is applied and measured. Figure 3
FIG. 3A shows the vertical vibration characteristic, and FIG. 3B shows the horizontal vibration characteristic. From this, it was confirmed to have good vibration characteristics.

Further, FIG. 9 shows the vibration characteristics in the vertical direction of the conventional shock mount described in FIG. Comparing this conventional example with the present embodiment shown in FIG. 3A, the shock mount S1 of the present embodiment has a lower peak, and the shock mount S1 of the present embodiment has a conventional peak. It was found that it has a sufficient vibration characteristic while being smaller than

4 and 5 are views for explaining another embodiment of the separable shock mount according to the present invention. The same components as those in the previous embodiment are designated by the same reference numerals, and detailed description will be omitted.

The separable shock mount S2 in this embodiment is different from the embodiment shown in FIG.
The inclination angles θ of A, 13B, 3D, and 15E are different, and the cushioning material 14 provided on the head 13 of the first member 1
The case where the thicknesses of A and 14B are different is illustrated. That is, the cushioning materials 14A and 14B shown in FIG. 5 are thinner than the cushioning materials 14A and 14B shown in FIG. 4, and as a result, a spacer (reference numeral 17 in FIG. 1) is provided on the separable shock mount S2 shown in FIG. Not used.

As described above, in the separable shock mount S2, the elastic constant can be changed without changing the overall shape and size by selecting the thickness of the cushioning materials 14A and 14B. Since the elastic constant can be changed by changing the inclination angle θ, the degree of freedom in design is very high.

FIG. 6 is a view for explaining still another embodiment of the separable shock mount according to the present invention. In addition,
The same components as those in the previous embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

Separable shock mount S3 of this embodiment
The first member 1 includes a shaft portion 18 having an intermediate diameter between the first male screw portion 11 and the head portion 13. Then, the cushioning material 19 provided on the outer periphery of the shaft portion 8, the cushioning material 20 provided on the tapered surface 13A on the shaft portion 18 side, the cushioning material 21 provided on the outer periphery of the head portion 13, and the top surface of the head portion 13 (FIG. 6). Then, the cushioning material 22 provided on the lower surface) is provided. The second member 2 does not have a tapered surface (reference numeral 15E) as shown in FIG. The cushioning members 19 to 22 are made of rubber and fixed to the first member 1 by adhesion.
It is not necessary to adhere to the second and third members 2 and 3.

The separable shock mount S3 having the above-described structure can obtain the same action and effect as those of the above-mentioned embodiment, and the shock absorbing members 19 and 21 provided on the outer periphery of the first member 1 can prevent lateral vibration. The damping function is enhanced. Further, since the cushioning material 22 provided on the top surface of the first member 1 is not inclined with respect to the axial direction, vibrations are not generated in the cushioning material 22.
Since it is subjected to pure compression and shearing, there is an advantage that the elastic constant can be easily predicted and the design can be easily changed.

In the above embodiment, each cushioning material 19-2 is used.
Although the case where 2 is provided separately is shown, these cushioning materials 19
Naturally, it is also possible to adhere to the first member 1 so that ˜22 are continuous.

FIG. 7 is a view for explaining a concrete example of use of the separable shock mount according to the present invention. In this example, various devices are mounted in the body R of the rocket.

Inside the body R of the rocket, a plurality of stays 50 are provided in a protruding state, and the base plate 51 is supported by the separable shock mounts S1 (S2, S3) provided on each stay 50. Base plate 51
A device 52 for observation, control, etc. is attached to the, and further, another device 53 is supported by using a plurality of separate shock mounts S1.

In this way, the plurality of separate shock mounts S1 protect the respective devices 52, 53 from vibrations at the time of launch of the rocket. Further, in the separable shock mount S1, as described above, since the cushioning materials are in contact with each other or the cushioning material and the second and third members in a state where no pressure is applied to the cushioning material, In particular, in a zero-gravity environment, the contact state between the two becomes very weak, which causes a large damping effect on vibration. Therefore, it is very suitable not only for supporting equipment in a rocket, but also as supporting means in a spacecraft on a circular orbit such as a space station.

The detailed construction of the separable shock mount according to the present invention is not limited to the above-mentioned embodiments, but the first to third members, the shape of the cushioning material, or the cushioning material. It is possible to appropriately change the location of intervention.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a separable shock mount according to the present invention.

FIG. 2 is a cross-sectional view illustrating the separated shock mount shown in FIG. 1 in an exploded state.

FIG. 3 is a graph (a) showing a vertical vibration characteristic of the separation-type shock mount shown in FIG. 1, a graph (b) showing a horizontal vibration characteristic, and an explanatory view (c) showing a measuring procedure of the vibration characteristic. Is.

FIG. 4 is a cross-sectional view showing another embodiment of the separable shock mount according to the present invention.

FIG. 5 is a cross-sectional view showing a case where the shock absorbers of the separable shock mount have different thicknesses.

FIG. 6 is a view showing still another embodiment of the separable shock mount according to the present invention, which is a side view (a) of the first member and the cushioning material, and a sectional view (b) for explaining an assembling procedure;
It is a sectional view (c) explaining an assembled state.

FIG. 7 is a cross-sectional view of a main part of a rocket explaining an example of use of the separable shock mount according to the present invention.

FIG. 8 is a cross-sectional view showing a conventional separable shock mount.

FIG. 9 is a graph showing vibration characteristics in the vertical direction of a conventional shock mount.

[Explanation of symbols]

S1-S3 Separable shock mount 1st member 2 Second member 3rd member 11 1st male thread 12 2nd male thread 13 head 14 14 cushioning material 15 15 cushioning material 19-22 cushioning material

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Wataru Hirakawa             900 Fujiki, Tomioka City, Gunma Prefecture             Lee H. I Aerospace En             Inside the genie ring F term (reference) 3J048 AA01 BA18 BD05 BD06 CB01                       DA03 EA13

Claims (3)

[Claims] 1. A separable shock mount having a first male thread portion and a second male thread portion in opposite directions on the same axis, the head having a larger diameter than the first male thread portion and the male thread portion. A first member having a second portion, a second member having a second male screw portion, and a first member
A first member is provided with a third member that is connected to the second member with the first male screw portion of the member being in a penetrating state and that accommodates the head of the first member between the second member and the head of the first member. A separable shock mount, wherein a cushioning material is interposed between the second and third members in the axial direction. 2. The second member and the third member are connected by a screw connection, and a spacer for adjusting the screwing amount of the second member and the third member can be interposed between the second member and the third member. The separable shock mount according to claim 1. 3. The head-facing surface of the first member and the axially facing surfaces of at least one of the second and third members are tapered. Separated shock mount described.