JPH0594549U - Air spring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an air spring device that can be miniaturized. An air spring main body 10 having an air chamber 13 formed by a hollow rubber body 11 and a substrate 12 whose airtightly closed lower end opening surface of the hollow rubber body, and an air chamber 13 of the air spring main body via a pipe. An orifice cylinder 22 having an orifice 21 penetrating the upper end of the hollow rubber body 11, and an orifice port of the orifice cylinder 22 supported reciprocally on the substrate 12 via a spring. A height adjusting valve 24 composed of a seal member 23 pressed so as to come into airtight contact with is provided in the air chamber 13 of the hollow rubber body. [Effect] By providing the height adjusting valve 24 in the air chamber 13, the installation space can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small air spring device.

[0002]

[Prior Art]

 Conventionally, an air spring body having an air chamber provided by a hollow rubber body, a height adjustment valve connected to the air chamber of the air spring body via piping, and an air source connected to the height adjustment valve. There is an air spring device composed of

In this air spring device, the air spring main body and the height adjusting valve are individually configured and juxtaposed, and both are fixed by connecting them with a frame or the like. At the time of use, compressed air is enclosed in the air chamber of the air spring body, and the equipment is supported on the air spring body via a surface plate. During use, the height of the surface plate is adjusted by the height adjustment valve to supply and discharge air in the air chamber to keep the height of the surface plate constant.

[0004]

[Problems to be solved by the device]

 However, in such a conventional air spring device, since the air spring body and the height adjusting valve are juxtaposed, a large installation space is required for that purpose, and it cannot be installed in a limited narrow place. There are difficulties.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an air spring device that can be miniaturized.

[0006]

[Means for Solving the Problems]

 The air spring device of the present invention comprises a hollow rubber body having an upper end closed and a lower end opened, and an air spring body having an air chamber formed by a substrate having an airtightly closed lower end opening surface of the hollow rubber body, and a pipe. In an air spring device having an air source communicating with the air chamber of the air spring body via an orifice cylinder body having an orifice penetrating the upper end of the hollow rubber body, and a spring in the substrate. A height adjusting valve that is reciprocally supported and is pressed against the orifice opening of the orifice cylinder so as to be in airtight contact with the height of the hollow rubber body. It is what

[0007]

[Action]

 Normally, that is, when the load of the equipment or the like and the air pressure in the air chamber of the air spring body are balanced, the orifice port of the orifice cylinder of the height adjusting valve is in contact with the sealing member and sealed. When the load on the equipment is reduced, the surface pressure rises due to the air pressure in the air chamber, and the air in the air chamber is released from the orifice of the orifice cylinder away from the seal member to the atmosphere. The surface plate is lowered to a predetermined height due to the decrease in air pressure in the air chamber. On the other hand, when the load of equipment etc. increases, the upper part of the air spring body descends, the seal member descends via the orifice cylinder, and the supply of air from the air source to the air chamber is started. The surface plate rises to a predetermined height.

[0008]

【Example】

 The air spring device of the present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure, an air spring main body 10 constitutes one air chamber 13 from a hollow rubber body 11 whose upper end is closed and whose lower end is open, and a substrate 12 whose lower end opening surface of this hollow rubber body 11 is airtightly closed. ..

A flange 14 is provided at the lower end of the hollow rubber body 11, and the flange 14 is hermetically fixed to the substrate 12 by a bolt 15 via a pressing ring 16. The upper center of the hollow rubber body 11 is sandwiched between the support member 17 and the pressing member 18, and a bellows portion 19 is provided on the side of the support member 17.

Inside the air chamber 13, a height adjusting valve 24 composed of an orifice cylinder 22 having an orifice 21 and a seal member 23 is arranged.

A through hole 25 is provided in the support member 17 and the pressing member 18 through the upper center of the hollow rubber body 11, and an orifice cylinder body 22 having a thread groove on its outer peripheral surface is screwed into the through hole 25. Has been done.

A recess 26 is provided at the center of the upper surface of the substrate 12, and a seal member 23 is attached to the recess 26 via a coil spring 27 so as to be slidable in the vertical direction. The seal member 23 is composed of a piston shaft 28 and seal plates 29 and 30 provided at both ends of the piston shaft 28. The piston shaft 28 is slidably fitted into a flat plate 31 fixed on the recess 26 of the base plate 12, Installed.

A reinforcing ring 32 is attached to the outer surface of the hollow rubber body 11.

The substrate 12 is provided with a ventilation hole 33 communicating with the inside of the recess 26, and is communicated with an air source (not shown).

The air spring device of the present invention is constructed as described above and operates as follows. Generally, when the load of the equipment is balanced with the air pressure in the air chamber of the air spring body, the piston shaft 28 receives the buoyancy force by the coil spring 27 and the seal plate 29 at the upper end is closed by the orifice as shown in the figure. It seals by contacting the orifice opening of the cylinder 22. At the same time, the seal plate 30 at the lower end of the piston shaft 28 is also in contact with the flat plate 31 by the coil spring 27, and the supply of air from the air source to the air chamber 13 is cut off.

When the load of the equipment or the like is reduced, the air pressure in the air chamber 13 raises the surface plate 34 mounted on the support member 17. At the same time, the orifice cylinder 22 separates from the seal plate 29, the air in the air chamber 13 is discharged to the atmosphere through the orifice 21 and the through hole 25, and when the surface plate 34 descends to a predetermined height, the orifice opening of the orifice cylinder 22 is opened. Comes into contact with the seal plate 29, and the release of the air in the air chamber 13 to the atmosphere is stopped.

On the other hand, when the load on the equipment or the like becomes large, the upper part of the air spring body descends and the piston shaft 28 of the seal member descends via the orifice cylinder 22. Then, the seal plate 30 is separated from the flat plate 31 against the spring force of the coil spring 27, passes through the ventilation hole 33, and the supply of air from the air source to the air chamber is started. When the surface plate 34 rises to a predetermined height due to an increase in the air pressure in the air chamber, the seal plate 30 contacts the flat plate 31 and the air supply to the air chamber is shut off.

[0018]

[Effect of the device]

 As described above, the air spring device of the present invention can be downsized by providing the height adjusting valve in the air chamber of the hollow rubber body for controlling the supply and discharge of the air into the air chamber, which is limited. It can be installed in a small space.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an air spring device of the present invention.

[Explanation of symbols]

10 ... Air spring main body, 11 ... Hollow rubber body, 12 ... Substrate,
13 ... Air chamber 17 ... Support member, 18 ... Holding member, 21 ... Orifice,
22 ... Orifice cylinder, 23 ... Seal member, 24 ... Height adjusting valve

Claims (1)

[Scope of utility model registration request] 1. An air spring main body having an air chamber formed by a hollow rubber body having an upper end closed and a lower end opened, and a substrate having an airtightly closed lower end opening surface of the hollow rubber body, and an air spring body through a pipe. In an air spring device including an air source communicating with an air chamber of an air spring body, an orifice cylinder having an orifice penetrating the upper end of the hollow rubber body, and a reciprocatingly supported on the substrate via a spring. An air spring device comprising a height adjusting valve, which is formed of a seal member that is pressed against the orifice port of the orifice cylinder so as to airtightly contact the orifice port.