JPS5855053Y2 - vehicle height adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle height adjustment device that includes a compressed air source and a lifting device that raises and lowers a vehicle body using the amount of compressed air sent from the compressed air source.

It is common practice to install a dehumidifier between the compressed air source and the device for lifting and lowering objects to prevent condensate from accumulating in the device and causing functional deterioration. The case of a vehicle height adjustment device that adjusts the vehicle height is no exception.

In the case of this vehicle height adjustment device, a simple dehumidifying device was required due to the installation space constraints of being mounted on a vehicle. A dehumidifying device that dehumidifies the air is sometimes used.

However, in the case of the desiccant method, the lifespan of the desiccant is limited, and there are problems such as the need to replace it or the powdered desiccant that may clog the switching valve or pipes. Therefore, it has been difficult for a vehicle height adjustment device equipped with such a dehumidifying device to maintain its normal function.

An object of the present invention is to provide a vehicle height adjustment device equipped with a dehumidifying device that is simple and yet can solve the above-mentioned problems.

This will be explained below based on a specific example.

Air compressor 1 as a compressed air source and this air compressor 1
A drain separator 10 to which a switching valve 3 is connected is interposed between a lifting device 2 that lifts and lowers the vehicle body using compressed air from the air. The device is configured.

The drain separator 10 includes a filter case 12 arranged concentrically inside a container body 11, a filter element 13 filled in the filter case 12, and a filter case 12 disposed concentrically inside the container body 11.
A spiral passage 14 is formed between the filter case 12 and the filter case 12.

A cylindrical filter case 12 is attached to the lower end of the camp 15.
A coil spring 16 is attached to the outer circumferential surface of the filter case 12 in a state where it has a free length and does not expand or contract.

Instead of the coil spring 16, a narrow plate shaped body formed into a spiral shape may be used, or a trapezoidal screw with a relatively large pitch may be provided integrally with the filter case 12.

The filter case 12 is filled with a filter element 13 such as glass wool that has a water droplet adhesion function, and a fall prevention member 17 formed of a net or a perforated plate is provided at the lower end of the filter case 12.

A lower end portion of the filter case 12 is a nozzle portion 18 tapered downward.

The filter case 12 formed as described above is attached to the container body 1.
1 and screws the cap 15 onto the upper end of the container body 11, a spiral passage 14 is formed in the compressed air introducing portion 19 by the coil spring 16.

If the spiral passage 14 is formed in this way, the following effects can be expected, so it is preferable to provide it.

That is, the compressed air guided to the compressed air introducing section 19 is
While passing through the spiral passage 14 between the container body 11 and the filter case 12, water droplets of approximately lOOμ or larger are scattered and removed by the cyclone effect on the inner wall surface of the container body 11, and fine particles are removed. The compressed air containing water droplets is reversed from the lower end nozzle part 18 of the filter case 12 and passes through the filter element 13, during which fine water droplets adhere to the filter element 13 and are removed, and the dehumidified compressed air is released from the discharge port 20. is taken out to the lifting device 2.

Moreover, since the compressed air passes through the spiral passage, the container body 1
The contact area with the inner wall surface of 1 becomes large, and the dehumidification effect can be further enhanced.

The lower end of the drain separator 10 is a drain outlet 21, and the drain outlet 21 is connected to the switching valve 3 by a pipe 22.

The compressed air introduction part 19 of the drain separator 10 configured as described above is connected to the air compressor 1 through a pipe 23, and the discharge part 2
The vehicle height adjusting device of the present invention is constructed by communicating the filter case 12 with the elevating device 2 through the piping 24.

Now, when raising the lifting device 2, the switching valve 3 is set to the cutoff position shown, and the compressed air obtained by the air compressor 1 is transferred to the pipe 23.
The air is then led to the compressed air introduction section 19 of the drain separator 10.

When the spiral passage 14 is provided as in this example, the compressed air is given a swirl by the spiral passage 14, and the
Water droplets of 00μ or more are scattered on the inner wall surface of the container body 11,
It collects in the drain outlet 21.

Thereafter, the compressed air is reversed at the nozzle part 18 and while passing through the filter element 13, remaining water droplets are separated and the air is removed from the outlet 2.
0 through the piping 24 to the lifting device 2 to adjust the vehicle height.

Next, when lowering the elevating device 2, the switching valve 3 can be switched to the atmosphere open side.

As a result, the compressed air in the lifting device 2 reaches the outlet 20 from the piping 24, and along with the water droplets attached to the filter element 13 in the filter case 12, is ejected from the nozzle part 18 at high speed toward the drain outlet 21. This jetting pressure also blows away the drain accumulated in the drain outlet 21, and the drain is discharged from the pipe 22 through the switching valve 3 to the atmosphere together with compressed air.

At the time of this spouting, negative pressure is generated between the container body 11 and the nozzle part 18 of the drain separator 10, so the compressed air also flows into the drain in this part, the upper compressed air introduction part 19, and even the piping 23. released into the atmosphere by

In the present invention configured as described above, the drain separator can be used semi-permanently, unlike a method that uses a desiccant, and even if used for a long period of time, the dehumidification performance will not deteriorate due to aging. There is no need for maintenance even when used for a long period of time.

Moreover, since the drain is forcibly discharged by compressed air, its discharge is reliable.

Furthermore, the drain remaining in the piping outside the drain separator can also be removed.

Therefore, the function of the elevating device provided in the vehicle height adjusting device can always be maintained well.

[Brief explanation of drawings]

The figure is an explanatory diagram of the vehicle height adjustment device of the present invention. 1... Air compressor, 2... Lifting device,
3...Switching valve, 10...Drain separator, 12...Filter case, 13...
filter element.

Claims (1)

[Scope of utility model registration request] A compressed air source, a lifting device that raises and lowers the vehicle body using the compressed air from the compressed air source, and a compressed air introduction section interposed between the compressed air source and the lifting device, with a compressed air introduction part on the compressed air source side and a lifting device on the lifting device side. a drain separator that communicates with one end of the filter case, and a switching valve that is connected to a drain outlet provided below the drain separator and selectively communicates the lifting device with the atmosphere and a compressed air source. In the vehicle height adjusting device, the other end of the filter case provided in the drain separator has a nozzle portion tapered toward the drain outlet.