JPH0231618Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an air spring device having bellofram.

[Technical background of the invention and its problems]

Conventionally, this type of air spring device has been constructed by arranging a load receiving plate that receives the load of equipment, etc. on the center part of the bellow ram. The spring constant in the horizontal direction is extremely large compared to .

Therefore, the natural frequency in the horizontal direction is large,
The drawback was that the vibration isolation effect in the horizontal direction was small.

[Purpose of invention]

The present invention was made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide an air spring device that has a large vibration isolation effect in the horizontal direction.

[Summary of the idea]

In other words, the air spring device of the present invention includes a case with an open top, a velofram whose outer periphery is attached to the upper part of the case to seal the upper surface of the case, and whose center part hangs downward from the outer periphery, and a velofram whose center part hangs downward from the outer periphery. Vibration isolating rubber placed and fixed via a support stand, a load receiving plate fixed on the top of the vibration isolator, damping liquid stored in the lower part of the case, and a support fixed on the support stand. The rod is characterized by having a damping member formed by fixing a resistance plate immersed in a damping liquid to the lower part of the rod.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

The figure shows an embodiment of the present invention.

In the figure, the top of the case 1 is open, and the outer peripheral edge of a bellows frame 2 is attached to the top of the case 1, so that the top is sealed. The center portion of the bellow frame 2 is suspended above the outer peripheral edge, and a vibration isolating rubber 4 is placed on the outer surface of the center portion via a support 3. The vibration-proof rubber 4 is made up of a cylindrical rubber elastic body 4a and metal plates 4b bonded to the upper and lower surfaces thereof. A columnar recess 3a is provided on the upper surface of the support base 3.

The vibration isolating rubber 4 is placed in the recess 3a and supported by the support base 3.
A bolt 6 protruding from the lower surface of the vibration isolating rubber 4 is screwed into a screw hole 5 provided at the bottom of the vibration isolating rubber 4.

A support 7 is erected on the upper surface of the vibration isolating rubber 4, and a load receiving plate 8 on which equipment and the like are placed is fixedly installed at the upper end of the support 7. An upper cover 9 is provided on the upper surface of the support base 3 and has a support 7 passing through it.

A highly viscous damping liquid 10 such as silicone oil is housed in the lower part of the case 1, and a resistance plate 12 of a damping member 11 is immersed in this damping liquid 10.
The damping member 11 is constructed by fixing the resistance plate 12 to the lower part of a support rod 13 which is screwed into the screw hole 5 of the support base 3 and hangs down through the bellow frame 2 in an airtight manner.

Reference numeral 14 denotes a nut that fixes the support rod 13 to the support base 3 and keeps the bellow ram 2 airtight. A plurality of protrusions 15 are provided on the lower surface of the resistance plate 12 to increase fluid resistance to the damping liquid 10.

The air spring device configured in this way has an air chamber 1a inside the case 1 sealed by the verofram 2.
Compressed air is supplied here from the supply port 16, and the support stand 3 is used with it raised to a predetermined height.

The vibrations applied to the air spring device of the present invention are damped by the vibration isolating rubber 4 together with the verofram 2, but since the distance between the load support point by the load receiving plate 8 and the elastic support point of the verofram 2 is large, The spring constant in the horizontal direction becomes smaller, and therefore the natural frequency in the horizontal direction also becomes smaller.

Further, in case of excessive vibrations, the resistance plate 12 in the damping liquid 10 acts as a damper, rapidly damping the vibrations.

[Effect of idea]

As described above, the air spring device of the present invention has a vibration isolating rubber provided on the support base on the verofram, and a damping member having a resistance plate immersed in the damping liquid below the support base. Because of this, the natural frequency in the horizontal direction can be made considerably small, and even excessive vibrations can be damped and a good vibration isolation effect can be achieved.

[Brief explanation of drawings]

The figure is a longitudinal sectional view showing an embodiment of the air spring device of the present invention. DESCRIPTION OF SYMBOLS 1... Case, 2... Verofram, 3... Support stand, 4... Vibration isolating rubber, 7... Support column, 8... Load receiving plate, 10... Damping fluid, 11... Damping member, 12...
...Resistance plate.

Claims (1)

[Scope of utility model registration request] A case with an open top surface, a velofram whose outer periphery is attached to the top of the case to seal the top surface of the case and whose center part hangs downward from the outer periphery, and a velofram which is placed and fixed on the outer surface of the center part of the velofram via a support stand. The vibration isolating rubber, the load receiving plate fixed to the top of the vibration isolating rubber, the damping liquid housed in the lower part of the case, and the lower part of the support rod fixed to the support stand are placed in the damping liquid. An air spring device comprising: a damping member formed by fixing a recessed resistance plate.