JPS63275823A - Buffer - Google Patents

Abstract

PURPOSE:To obtain a satisfactory capacity as a buffer by separating a flexible case into two chambers through a unidirectional valve and pressurizing one of two chambers from the outside. CONSTITUTION:A flexible case 1 formed by heat-resisting flexible material such as synthetic resin or the like is separated into two chambers 1a, 1b by a projecting valve 2, and a medium fluid 3 is poured into the chambers to be sealed therein. When pressure is applied to the lower chamber 1a of the flexible case, an interior fluid 3 is kept from being suddenly driven out to the upper chamber 1b by the valve element 2, so that resisting force is applied by a dash pot mechanism where the fluid escapes gradually from an orifice of the valve. With the resisting force, a spring 6 is compressed, and the spring 6 is expanded to return the interior fluid 3 in the upper chamber 1b to the lower chamber 1a. Then the spring is returned. Accordingly, a large-capacity fluid can be used to exert an effect of reducing and absorbing a shock.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shock absorber that exerts a buffering and damping effect.

[Prior art and problems]

Conventionally, a device in which a piston is fitted into a cylinder has been proposed as a hydraulic shock absorber, but the fitting gap between the cylinder and piston always requires good lubrication, and oil is mainly used for the working particles. There were restrictions that could not be met. For this reason, it was not possible to arbitrarily control the buffering characteristics.

[Means for solving problems]

The present invention has been proposed in view of the above points, and the interior of the flexible case is separated into two chambers by providing a one-way valve, and liquid, viscous material, gas, powder, or The mixed fluid is injected into the flexible case, and one of the two chambers is pressurized from the outside of the flexible case.

〔Example〕

The present invention will be explained below with reference to an embodiment of the drawings.

In Fig. 1, 1 is a flexible case made of heat-resistant material such as synthetic rubber, which is separated into two chambers 1a and Ib by a protruding valve 2 with a small hole penetrated inside. Then, the medium fluid 3 is injected into this and sealed. Any liquid, viscous material, gas, powder or granular material, or a mixture thereof can be used as the working medium. Reference numeral 4 denotes a rigid case which pressurizes and supports from the outside a constricted valve part that separates the upper and lower chambers of the flexible case 1 with a tip projection portion 4a, and 5 denotes an outer case that fits on the outer periphery of the inner case. The flexible case 1 is housed in the case. A non-lubricated bearing 7 is provided in the fitting gap between the inner and outer cases 4 and 5. 6 is a compression spring that resists the pressure applied by the rod 8. In the figure, the above-mentioned shock absorber is used in the connecting part between the engine valve drive shaft and the cam of a car. 9 is a rocker arm, and the protrusion 4b of the case 4 is connected to this to drive the engine valve. A pressure rod 8 is connected to the shaft 10 , and a pressure rod 8 is provided on the other outer case 5 and pressurized by a cam 11 .

When the cam 11 rotates and pushes up the rod 8, the rod 8
The pressurization is transmitted from the outer case 5 to the outer case 4 via the lower chamber 1a of the flexible case. At this time, the lower chamber 1a of the flexible case
When pressure) j is applied to the chamber, the indoor fluid 3 is not suddenly expelled to the upper chamber 1b by the valve body 2, but is exerted by a resistance force due to the dashpot mechanism in which it gradually escapes from the orifice of the valve. The volume of the lower chamber 1b is reduced in accordance with the outflow of the fluid, and the spring 6 is compressed together with this. The push-up pressure of the outer case 5 is transmitted to the inner case 4 while the dashpot absorbs energy and reduces the movement speed, and the rocker
Push up the arm 9 and push down the valve shaft 10.

When the pressure on the rod 8 is released by VE due to the rotation of the cam 11,
The compressed spring 6 expands and rapidly returns the internal fluid 3 in the upper chamber 1b to F¥18, returning to its original state. In this way, the rotation of the cam 11 is transmitted to the rocker arm while exerting a buffering effect to drive the valve llll1l110, thereby making it possible to control the opening and closing of the valve intermittently and stably and smoothly.

Note that the pressure by the knob 11 may be applied to the inner case 4, and the pressure may be applied from the outer case 5 to the rocker arm 9.

In Figure 2, a ball valve 12 is used as a one-way valve provided in a part that separates the flexible case into two chambers, and the ball valve 12 is operated in the direction from the upper chamber 1b to the lower chamber 1a. In this embodiment of the damper, the same reference numerals as in FIG. 1 indicate the same parts.

In the damper operation of this embodiment, when an upward impact pressure is applied to the outer case 5, the outer case 5 compresses the spring 6 and absorbs the impact pressure. The lower chamber 1a of the flexible case is compressed by the pressurization of the outer case 5, but the fluid 3 inside the chamber is compressed in the upper space 1b.
Since the spring 6 is easily expelled by the shock absorber, the spring 6 can be easily compressed rapidly and absorb shock. The compressed spring 6 tries to expand at the next moment and pressurizes the upper chamber 1b, but the upper chamber 1b
Due to the one-way valve 12, the fluid 3 cannot return suddenly, but gradually returns to the royal state and returns to its original state while exerting a braking force. In this way, shock reduction, shooting attenuation,
It can have a buffering effect.

Note that the flexible case 1 can be made of oil-resistant, heat-resistant (about 200° C.) synthetic resin, rubber, or the like. The powder and granules used for the fluid are fine particles with a particle size of about 10 to 50 μΦ, and polymers with a molecular weight of about η-5 to 8 million, Ano203, ZrOz, Sf○2, etc. Any suitable stool quality or heat-resistant material can be used.

Also, liquids include various oils, liquid paraffin, etc.
...Use other.

Further, the flexible case can be supported in the center by a fixed part of the device, or by an outer case.

In addition, it is necessary to provide a means for cooling the flexible case from the outside when it is operated frequently and generates heat.

〔Effect of the invention〕

As described above, the present invention provides a one-way valve to separate the interior of the flexible case into two chambers, and in the chamber, liquid, viscous material, gas,
Powder or granular material or a mixed fluid thereof is injected and sealed, and one of the two chambers is pressurized from the outside of the flexible case, so it is easy to create one with sufficient capacity as a gentle WJ device. 4'J, and unlike conventional pistons, there are no sliding parts, so there is no need for lubrication, and any fluid can be used as the working medium. You can get something. As a result, it is possible to arbitrarily select a buffering effect such as a buffering efficiency and a high dissipation efficiency, and a damper effect such as a braking force and a braking characteristic, and by using a heat-resistant powder, stability due to temperature can be improved. Furthermore, since the fluid is sealed within the flexible case, it is not consumed or deteriorated, and stable characteristics can be maintained.

[Brief explanation of drawings]

FIG. 1 is a structural diagram of one embodiment of the present invention, and FIG. 2 is a diagram of another implementation gate structure. 1...Flexible cases la, 1b...Separation chamber 2...One-way valve 3...・Fluid 4...Inner case 5...Outer case 6...Spring 7...Lubricant Patent applicant: Kiyoshi Inoue, representative of Inoue Japax Institute Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] A one-way valve is installed inside the flexible case to separate it into two chambers.
A buffer characterized in that a liquid, a viscous material, a gas, a granular material, or a mixed fluid thereof is injected into the chamber and sealed, and one of the two chambers is pressurized from the outside of the flexible case. vessel.