JPS59151646A - Shock absorber - Google Patents

Abstract

PURPOSE:To absorb the impact of vibrations, etc., excepting those in the direction of gravity, by housing a compression coil spring in space between a shaft and a collar, while locking a slider to the tip end of each plate spring embedded in the peripheral surface of the collar and making this slider inscribe the inside of a housing. CONSTITUTION:Each of compression coil springs 14a and 14b is housed in space between a shaft 12 and a collar 15, while plural pieces of plate springs 17 are radially embedded in a peripheral surface 16 of the collar 15, then a slider 18 is locked to a tip end of the plate spring 17, and this slider 18 is inscribed to a casklike hole 23 being formed inside a housing 20. With this, when vibration and impact other than those in the direction of gravity act on the housing 20 via a fixed surface 5, the slider on the tip of the plate spring 17 slides along the casklike hole 23 of the housing 20 so that no load acts on a shaft 10 and the vibration and impact other than those in the direction of gravity can be absorbed.

Description

[Detailed Description of the Invention] The present invention is designed to absorb shocks or vibrations from the outside when transporting devices, structures, etc. that are sensitive to vibrations or shocks, such as electronic equipment, in a portable shelter or the like. The present invention relates to a shock absorber for preventing damage to equipment or structures, and particularly relates to a small, lightweight, and simple shock absorber that absorbs external forces acting in directions other than the direction of gravity. When electronic devices, etc. are mounted on a portable shelter etc. that can be mounted on a vehicle, the floor 2 of the shelter etc.
An electronic device 4 is placed and fixed on a shock mount, vibration mount, or other shock mount 3 made of a spring, rubber, etc., which is attached to the mount. However, the force applied from the outside when moving the shelter, etc. 1 is not only in the direction of gravity (hereinafter referred to as the vertical direction), but also in a direction perpendicular to it, or in many cases, the center of gravity of the electronic device, etc. 4 Due to the unbalance of the A shock absorber 6 is installed to prevent the shaking.This horizontal shaking occurs as a combination of shaking in the three directions of X, Y, and Z indicated by the arrows in Figure 3. A conventional shock absorber 6 configured as shown in FIG.
In many cases, the structure is designed to focus on one of the components of vibration on the plane consisting of the axis and the Y-axis, and most of the structures used in particularly small load areas are designed to handle loads in one direction. It has a structure that is effective only against Therefore, it is not possible to sufficiently protect electronic equipment etc. 4 from horizontal shaking.
In severe cases, the side wall of the electronic equipment 4 to which the shock absorber 6 is attached may be damaged.

It is an object of the present invention to provide a small, lightweight, component-structured shock absorber that protects electronic devices and the like from vibrations, shocks, etc., particularly in directions other than the direction of gravity.

A shock absorbing device according to the present invention includes a shaft formed to be fixed to a fixed surface and having a flange on the body, a pair of compression coil springs pivoted to the shaft with the flange sandwiched between them, and the compression coil springs housed in the shaft. A cylindrical collar is slidably attached to the shaft, and a barrel-shaped hole is parallel to the axial direction of the collar and radially embedded in the curved surface of the collar, and a slider is inscribed at the tip and accommodated therein. It is characterized by a howling formed to be fixed to a fixed surface.

The details of the present invention will be explained below with reference to FIGS. 4 and 5. FIG. 4 is a partially cutaway side view of a shock absorber according to an embodiment of the present invention, and FIG.
FIG. In both figures, reference numeral 10 denotes a shaft, which is fixed to a fixed surface 7, which is a side wall of an electronic device, using bolts 30 or the like via a flange 11 integrally provided at one end of the shaft 10.

Reference numeral 20 denotes a housing that encloses the shaft 10, and is integrally provided at one end of the shaft 10 facing the 7 flange 11, and is attached via a portion 21 to a fixing surface 5, which is a wall surface of a shelter, etc., with bolts 31, etc. It is fixed using The shaft 10 and the housing 20 are engaged by a buffer mechanism to be described later, and external vibrations, shocks, etc. transmitted from the fixed surface 5 are absorbed and are not transmitted to the fixed surface (object) 7. . The buffer mechanism that engages the shaft 10 and the housing 20 will be described below. Compression coil springs 14a and 14b of the same strength are pivotally attached to both sides of the collar 130, respectively. , 4 compression coil springs 14a and 1
4b is housed in a drum-shaped collar 15 that is slidably attached to the shaft 10, and the collar 13 of the shaft 10 is positioned at the midpoint in the axial direction of the collar 15 (the position shown in FIG. 4).
to hold.

A plurality of leaf springs 17 are installed in the collar 15 in parallel to the axial direction of the collar 15 and radially on the circumferential surface 16 of the collar 15. Since these leaf springs 17 need to have sufficient length to enhance the buffering effect, the leaf springs are formed into a semi-circular shape as shown in FIG. Further, the number of leaf springs 17 to be used and the elastic modulus are determined depending on the magnitude of the load to be absorbed. Furthermore, spherical or barrel-shaped sliders 18 are fixed to the tips of these leaf springs 17, respectively.

These sliders 18 are connected to the aforementioned 71 Uging 20.
It is inscribed in a barrel-shaped hole 22 formed inside.

The operation of the shock absorber constructed as described above will now be described. In FIG. 4, the axial direction of the shaft 10 is the Z axis,
The axis perpendicular to this Z-axis and parallel to one horizontal plane is the X-axis, and the axis perpendicular to the X-axis is the Y-axis. If a load (simply referred to as a load) is applied, this load can be decomposed into X1Y and 2 components (component forces). Among these component forces, the leaf spring 17 serves as a buffer for component forces in the X-axis and Y-axis directions. That is, the vibration of the housing 20 is transmitted to the leaf spring 17 via the slider 18. If a load is applied upward on the Y axis, the lower leaf spring will contract and the upper leaf spring will expand. Similarly, in the X-axis direction, the leaf springs 17 in the direction in which the load is applied contract and the opposite side thereof expands, so that the load is weakened and absorbed by the contraction of these leaf springs 17. Therefore, the shaft 1o fixed to the fixed surface 7 and the collar 15 pivoted to the shaft 10 hardly move, and no load is transmitted to the fixed surface 7. On the other hand, the component force in the Z-axis direction is absorbed by the compression coil spring 14a or 14b via the leaf spring 17 and the collar 15. At this time, since the leaf spring 17 is provided parallel to the axial direction of the shirt 10, that is, the Z-axis direction, it has rigidity and hardly flexes against the load in the Z-axis direction.

In the explanation so far, the load has been considered only in the plane composed of the Shaking on a plane constituted by the shaft also occurs, and the movement of the housing 2o in this case becomes a pestle-like movement about the axis of the shaft 1o. For such movement (load), the inner wall 2 of the barrel-shaped hole 22 of the housing 20
Since the slider 18 at the tip of the leaf spring 17 slides along the shaft 10, no load is transmitted to the shaft 10.

As is clear from the above description, the shock absorber according to the present invention can easily absorb vibrations, shocks, etc. applied from any direction and support objects to be fixed, and is particularly useful for portable shelters. It can be used to absorb external forces acting in a direction other than the gravitational direction that is applied to electronic equipment or structures that are carried on vehicles, etc., and can be used to achieve great effects.

In addition, the shock absorber according to the present invention has a simple structure, so it can be configured to be small and lightweight, and has the advantage that it does not take up much space when it is used to mount electronic equipment, etc. in a confined space such as a portable shelter. play.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of a conventional method for mounting electronic equipment etc. in a portable shelter, etc., and FIG. 4 is a partially cutaway side view showing an embodiment of the shock absorber according to the present invention. FIG. 5 is a sectional view taken along the line A-A shown in FIG. 4. In the figure, 5... fixed surface, 7... fixed surface, 10...
Yaft, 12... body, 13... tsuba, 14a11
4b... Compression coil spring, 15... Cylindrical cane collar,
16... Surrounding surface, 17... Leaf spring, 18... Slider, 20... Housing, 22... Barrel-shaped hole patent applicant Nippon Avionics Co., Ltd.

Claims (1)

[Scope of Claims] A shaft that is formed to be fixed to a surface to be fixed and that provides a collar to the torso, and the shirt l that is sandwiched between the shaft. a pair of compression coil springs pivoted on the shaft; a cylindrical collar housing the compression coil springs and slidably pivoting on the shaft; It consists of a semicircular temporary spring which is implanted and has a slider fixed to its tip, and a housing which is fixed to a fixing surface and has a hole in which the slider of the leaf spring is inscribed and housed. A buffer device O characterized by