JPH032474Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air circuit system unit for a vehicle height adjustment device.

The present applicant previously proposed a vehicle height adjustment device that can check the internal pressure of the gas circuit after each vehicle height adjustment is completed, and thereby diagnose whether the component parts are normal or abnormal. -146977 (Unexamined Japanese Patent Publication No. 60-38274)). This vehicle height adjustment device was developed primarily for motorcycles, and is designed to selectively supply and discharge high-pressure air to the vehicle adjustment gas chambers formed in the front fork and rear suspension. Adjust the vehicle height at the front and rear of the vehicle. The structure is such that only one pressure sensor for checking the internal pressure is provided for each of the front and rear gas chambers.

By the way, the pressure sensor is provided upstream of a switching solenoid valve that selectively forms an air supply path to the front gas chamber and the rear gas chamber, but the front and rear switching solenoid valve, the pressure sensor, and the pressure sensor are integrated. The air circuit system is formed as a separate single part from the single atmospheric release relief solenoid valve.

The present invention takes into consideration the configuration of such a vehicle height adjustment device, and includes a pressure sensor, a relief solenoid valve,
This is an improvement to the configuration of the front/rear switching valve unit.

Furthermore, the pressure sensor measures the internal pressure of the air circuit system of the vehicle height adjustment device including the gas chamber, etc.
It is not possible to measure any high pressure, and in order to protect the sensor, it is necessary to provide a mechanism to prevent damage from overpressure. The present invention also provides a mechanism for preventing destruction of such pressure sensors.

Based on the above, the purpose of the present invention is to integrate each element constituting the air circuit system of the vehicle height adjustment device into a single unit, provide a protection mechanism for the pressure sensor, and thereby protect the air circuit system of the vehicle height adjustment device. To simplify the structure of the circuit system, facilitate assembly and handling, and reduce failures, and at the same time, sufficiently protect the pressure sensor to maintain high operational reliability of the vehicle height adjustment system as a whole. That's what I did.

The features of the present invention include a plurality of suspension systems each containing a compressor and a gas chamber for adjusting vehicle height;
A switching solenoid valve that selectively opens and closes the gas chambers and the compressor to communicate with each other, and a solenoid valve for opening to the atmosphere and a pressure sensor for measuring the internal pressure of the air passage, which are disposed upstream of the switching solenoid valve. In the vehicle height adjustment device, the switching electromagnetic valve, the atmospheric release electromagnetic valve, and the pressure sensor are integrated, and the pressure sensor is provided with an overpressure breakdown prevention mechanism.

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

In FIG. 1, reference numeral 1 denotes a compressed air generator, which is composed of a compressor 2 and a dryer 3. 4 is a unit consisting of a relief solenoid valve 5 for opening to the atmosphere, a solenoid valve 6 for the front side, a solenoid valve 7 for the rear side, and a pressure sensor 8.

The compressor 2 is operated at the required timing according to the command from the control circuit unit 9, and the filter 1
0 to generate high pressure air.
The generated high-pressure air is dried in the dryer 3 and sent toward the unit 4. The dryer 3 and the unit 4 are connected by an air pipe 11.

In the unit 4, a solenoid valve 5 for opening to atmosphere, a pressure sensor 8, and solenoid valves 7 and 6 are arranged in this order from the upstream side. When the solenoid valve 5 opens, the internal pressure of the air circuit system becomes equal to atmospheric pressure. Pressure sensor 8 can measure the pressure in the air circuit. Furthermore, when the solenoid valve 6 opens, the compressed air generator 1 is brought into communication with the vehicle height adjustment gas chamber provided inside the front forks 14, 14 via the air pipe 12 and the three-way socket 13. When the solenoid valve 7 is opened, the compressed air generator 1 is brought into communication with the vehicle height adjusting gas chamber provided inside the rear suspensions 17, 17 via the air pipe 15 and the three-way socket 16.

The solenoid valves 5, 6, and 7 are opened and closed under the control of the control circuit unit 9.
Further, pressure information obtained by the pressure sensor 8 is input to the control circuit unit 9. It is also assumed that a check valve (not shown) is provided at a location in the unit 4 that takes in high-pressure air.

Next, the air circuit system including the aforementioned control circuit unit 9 will be described. The input side elements of the control circuit unit 9 include a vehicle height sensor 18 as a detection means, a voltage abnormality detection sensor 19, a side stand release detection sensor 20, a main stand release detection sensor 21, a brake operating state detection sensor 22,
and the pressure sensor 8, and a reset type auto start switch 2 as the other operating means.
3. A manual front/rear selection switch 24 and a manual up/neutral/down selection switch 25 are provided. The output side of the control circuit unit 9 includes the compressor 2, the relief solenoid valve 5, and the solenoid valves 6 and 7 as controlled objects, as well as the pressure sensor 8 and the solenoid valves 5, 6, and 7 as display elements. A lamp 26 that gives an alarm when an abnormality occurs, a lamp 27 that flashes only during automatic vehicle height adjustment, and a pair of pressure digitals that can separately display the internal pressure of each gas chamber of the front fork 14 and rear suspension 17. A display 28 is provided. In the figure, 29 is a terminal connected to a power source, and 30 is a system start switch. The system start switch 30 is normally kept closed, and by opening and closing it as necessary, the entire system of the vehicle height adjustment device can be reset.

The vehicle height adjustment device having the above-mentioned configuration senses the condition of the vehicle using various sensors, and performs an adjustment operation to obtain a desired vehicle height based on the operation of the operating means. The details of this operation are omitted because they have little relevance to the content of the present invention.

FIG. 2 shows a detailed embodiment of the unit 4. Air pipe 1 connected to dryer 3
1 is connected to the left end of the unit base 4a and communicates with a passage 4b in the unit base 4a via a check valve 31. In this unit base 4a,
Solenoid valves 5, 6, 7 and pressure sensors 8 are provided through each passage leading to passage 4b. In each solenoid valve 5, 6, 7, 5
6a is an opening/closing part communicating with the atmosphere, 6a is an opening/closing part communicating with the air pipe 12, and 7a is an opening/closing part communicating with the air pipe 15, each of which is provided with an opening/closing means. Also, a space S ₁ in the middle of the passage 4b at the bottom of the pressure sensor 8
is provided with a mechanism to prevent the pressure sensor 8 from being destroyed by overpressure as described below.

In the above, when the solenoid valves 6 and 7 open appropriately and the compressor 2 operates, high-pressure air is delivered to the front fork 14 or the rear action 1.
It is sent to the gas chamber No. 7 and raises the vehicle height. Since the pressures of the high-pressure air supplied in advance are different between the gas chamber of the front fork 14 and the gas chamber of the rear reaction 17, the solenoid valves 6 and 7 do not open at the same time, but open exclusively and selectively. become. Further, by opening the solenoid valve 5 and opening either one of the solenoid valves 6 and 7, the height of the front and rear of the vehicle can be lowered.
In this case, one of the front and rear vehicle heights can be lowered,
Solenoid valves 6 and 7 are never opened at the same time. The pressure sensor 8 can measure the internal pressure of each gas chamber when either the solenoid valves 6 or 7 is open and the passage 4b is in communication with each gas chamber. Further, when both the solenoid valves 6 and 7 are in a closed state, a zero pressure test can be performed by opening the solenoid valve 5 and opening the passage 4b to the atmosphere.

According to the above configuration, the solenoid valve 5 and the pressure sensor 8 are replaced by the solenoid valve 6 for front and rear switching,
Since it is provided on the upstream side of solenoid valves 5, 6, and 7, it is sufficient to provide one each, and
7. The pressure sensor 8 can be integrated into a unit, making it possible to simplify the configuration.

FIG. 3 shows the destruction prevention mechanism. A space _S1 with a circular cross section communicating with the passage 4b is formed below the pressure sensor 8 of the unit base 4a, and a piston member 32 having an abutment 32a formed at the right _end in the figure is slidably inside this space S1. The left end of the piston member 32 in the drawing is elastically supported in the right direction by a coil spring 34 supported by a spring receiver 33. Around the outer circumference of the piston member 32,
The piston member 32 connects the O-ring 35, the passage 4b, and the lower passage 4c of the pressure sensor 8 to the space _S1.
A groove 32b and a hole 32c are formed which allow communication only when located at the right end position in the figure.

In the above configuration, the elastic force of the coil spring 34 is set in advance to be equal to the gas pressure that is undesirable to be applied to the pressure sensor 8. Therefore, when the gas pressure in the passage 4b is normal, the piston member 32 is in the state shown in the figure and can measure the gas pressure. However, when the gas pressure in the passage 4b becomes higher than a predetermined pressure, the piston member 32 moves to the left against the coil spring 34, interrupting the communication between the passage 4b and the passage 4c, and causing the pressure sensor 8 to It will be protected.

FIG. 4 shows a modified embodiment of the destruction prevention mechanism. In this embodiment, a holding plate 37 is mounted on the unit base 4a and has a passage 38a communicating with the passage 4, and has a diaphragm 36 and a central hole 37a.
A cylindrical body 38 having a pressure sensor 8 is attached to the cylindrical body 38, and a lid member 39 provided with a pressure sensor 8 is hermetically fixed to this cylindrical body 38. According to this configuration, the passage 38
a, the pressure sensor 8 can measure the gas pressure in the passage 4b via the diaphragm 36 and the central hole 37a. However, when the gas pressure in the passage 4b becomes overpressure, the expansion of the diaphragm 36 can be restricted by the presser plate 37, so the pressure sensor 8
It is possible to prevent overpressure from being applied to the In this embodiment, the structure can be made strong and simple.

The above-mentioned destruction prevention mechanism can also be provided below the solenoid valve 7 of the rear suspension or below the solenoid valve 6 on the front fork side, where the gas pressure is set lower than that on the rear suspension side.

As is clear from the above explanation, according to the present invention, the configuration of the air circuit system of the vehicle height adjustment device can be simplified to facilitate assembly and handling, and the pressure sensor, etc. can be prevented by overpressure. Since a mechanism is provided to prevent damage, failures can be reduced and operational reliability can be improved.

Note that the present invention can also be applied to vehicle height adjustment devices for other vehicle types other than motorcycles, such as four-wheeled vehicles that have different front and rear pressures.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the vehicle height adjustment device, Figure 2 is a detailed diagram of the air circuit system parts assembly unit, Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 is a modified example. FIG. 3 is a similar view to FIG. 3 according to FIG. In the drawing, 1 is a compressed air generator, 5 is a relief solenoid valve for opening to the atmosphere, 6 is a front solenoid valve, 7 is a rear solenoid valve, 8 is a pressure sensor, 9 is a control circuit unit, 14 is a front fork, 17 is a rear action, 32 is a piston member, 36 is a diaphragm, and 37 is a presser plate.

Claims (1)

[Scope of utility model registration request] a compressor, a plurality of suspension systems each containing a vehicle height adjustment gas chamber, a switching solenoid valve that communicates each of the gas chambers with the compressor by selective opening and closing, and a switching solenoid valve disposed upstream of the switching solenoid valve. A vehicle height adjustment device comprising a solenoid valve for opening to the atmosphere and a pressure sensor for measuring air passage internal pressure, wherein the switching solenoid valve, the solenoid valve for opening to the atmosphere, and the pressure sensor are integrated, and the pressure sensor An air circuit system unit for a vehicle height adjustment device, characterized in that an overpressure breakdown prevention mechanism is provided in the vehicle height adjustment device.