JPH0450167Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a vehicle height sensor mounting structure in an automobile vehicle height adjustment device.

Prior Art In an automobile wheel suspension system that uses an air suspension that utilizes the volumetric elasticity of air sealed inside, air is supplied from the outside into the air sealed portion of the air suspension. The vehicle height can be lowered by raising the height and discharging the enclosed air to the outside.

Therefore, by installing a vehicle height sensor inside the air enclosure of the air suspension and automatically supplying and discharging air from the air enclosure based on the signal from the vehicle height sensor, the vehicle height is always kept at the normal value. A device designed to maintain the temperature has already been developed and disclosed, for example, in Japanese Patent Application Laid-Open No. 112816/1983.

Problems to be Solved by the Invention In the air suspension system in which the vehicle height sensor is mounted inside the air enclosure as described above, conventionally, a harness is drawn out from the air enclosure from the mounting part of the vehicle height sensor and the vehicle height sensor to the outside. For example, the vehicle height sensor is fixed to the upper surface of the air enclosure through a sensor bracket by welding, and the sensor harness pullout plug is provided on the side wall of the air enclosure. Usually, they are located at different positions, which poses a problem in that the work of attaching these two members is extremely complicated and time-consuming.

The present invention aims to address the above-mentioned conventional problems.

Means for Solving the Problems The present invention forms an air-sealed portion on the outer periphery of an extensible member consisting of a cylinder member and a rod slidably fitted into the cylinder member, and allows air to flow into the air-sealed portion. In an air suspension in which air supply and exhaust are automatically performed using signals from a vehicle height sensor, a through hole is formed in the peripheral wall surface of the upper housing that is fixed to the rod and forms the upper wall surface and upper peripheral wall surface of the air sealing part. A sensor harness pull-out plug is fixed to the upper part of the sensor bracket that holds the vehicle height sensor, and the sensor harness is pulled out from the inner cavity of the sensor harness pull-out plug, and the sensor harness is pulled out from inside the sensor bracket and the inner cavity of the sensor harness pull-out plug. A sensor bracket assembly is constructed by filling the gap with a synthetic resin material, and the plug for pulling out the sensor harness is fitted into the through hole provided in the above-mentioned Atsupa housing, and is connected to the tightening member from the outside of the Atsupa housing. The sensor bracket assembly is mounted and fixed at a predetermined position on the inner surface of the upper housing by tightening and fixing the sensor bracket assembly.

Function As mentioned above, by making the sensor harness pull-out plug double as a member for attaching and fixing the vehicle height sensor's Atsupa housing, the vehicle height sensor and sensor harness pull-out plug are simultaneously attached and fixed to the Atsupa housing. In addition, since the sensor bracket is installed based on the through hole of the upper housing, the relative position of the vehicle height sensor and the drive magnet can be easily and reliably set, which significantly simplifies the installation work and reduces costs. It can also be measured.

In addition, by adopting a structure in which the gaps in the sensor bracket and the inner cavity of the sensor harness pull-out plug are filled with synthetic resin material, air leakage from the internal gap of the sensor harness is completely prevented, making it easy to install. Depending on the configuration, reliable sealing can be achieved.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes an extensible member consisting of a cylinder member 2 and a rod 3 fitted so as to be slidable therein. The upper end of the rod 3 is attached to a vehicle body member via an elastic member (not shown).

A lower housing 4 is provided on the outer peripheral surface of the cylinder member 2.
The bottom surface of the rod 3 is fixed by welding or the like, and the top surface of the upper housing 5 is penetrated and fixed to the top of the rod 3.
The lower and upper housings 4 and 5 are airtightly connected by a diaphragm 6 made of a flexible member.
The diaphragm 6 forms an air-tight air sealing section 7 surrounding the outer periphery of the expandable member 1. 8 is a bump stopper.

A drive magnet 9 is fixed to the cylinder member 2.

Reference numeral 10 denotes a vehicle height sensor consisting of a magnetically sensitive switch etc. that operates in response to the magnetism of the drive magnet 9, and the vehicle height sensor 10 is connected to the sensor bracket 1.
1, and the sensor bracket 1 is fixed in a predetermined position.
By attaching the upper part of the sensor bracket 11 to the inner surface of the peripheral wall surface of the upper housing 5,
A vehicle height sensor 10 mounted and held on the vehicle moves up and down relative to the drive magnet 9 in a state close to and opposed to the drive magnet 9 as the telescopic member 1 expands and contracts. The vehicle height control circuit outputs an output signal to control the supply and exhaust of the air sealing section 7, thereby maintaining the vehicle height at a normal position.

As a means for attaching and fixing the sensor bracket 11 to the peripheral wall surface of the upper housing 5, a sensor harness pull-out plug 12 is used.

The sensor harness drawer plug 12 has a structure in which a flange portion 12b protruding outward is formed at one end of a cylindrical body 12a having a male threaded portion 12c on the outer peripheral surface, and the cylindrical body 12a is attached to a sensor bracket. The flange portion 12b is inserted into the through hole provided at the upper part of the sensor bracket 11.
It is joined to the peripheral surface of the through hole No. 1 and fixed by welding W or the like.

A vehicle height sensor 10 is fixed to a predetermined position below the sensor bracket 11, and its sensor harness 10
A is pulled out from the inner cavity of the sensor harness pull-out plug 12, and the gap from the sensor bracket 11 to the inner cavity of the sensor harness pull-out plug 12 is filled with a synthetic resin material 16 to form a sensor bracket assembly.

Then, the cylindrical body 12a of the sensor harness pull-out plug 12 is inserted into the through hole 5a provided on the peripheral wall of the Atsupa housing 5 from the inside to the outside, and is fixed to the inner surface of the Atsupa housing 5 by welding or the like. The sensor bracket assembly is attached to the upper housing 5 by fitting the lower part of the sensor bracket 11 into the stopper 17 to prevent vibration, and by screwing and tightening the nut 13 from the outside into the male threaded part 12c on the outer periphery of the cylindrical body 12a. It is installed and fixed.

In FIG. 2, 14 and 15 are O-rings for sealing.

As described above, since the sensor bracket assembly is installed based on the through hole 5a of the upper housing 5, the vehicle height sensor 10 is attached to the sensor bracket 11.
By appropriately setting the mounting position of the sensor harness drawer plug 12 as a reference, the relative positions of the vehicle height sensor 10 and the drive magnet 9 can be set accurately and without variation, which simplifies the vehicle height sensor installation work. It can be measured.

Also, among air leaks from the pull-out portion of the sensor harness 10a, air leaking into the vehicle height sensor 10 from the mating surface of the vehicle height sensor 10 and the sensor harness 10a passes through the interior of the sensor harness 10a to the outside. It is quite difficult to prevent leakage in the flow path, but as mentioned above, sensor bracket 1
1 and the inner cavity of the sensor harness pull-out plug 12 are all filled with synthetic resin material 16, so that the sensor harness 10a
Not only air leakage from the outer periphery of the sensor harness 10a but also air leakage from the inside of the sensor harness 10a is completely prevented, and a reliable sealing performance can be easily obtained as a whole.

Effects of the Invention According to the present invention configured as described above, the sensor harness pull-out plug itself also serves as a fixing member for attaching the sensor bracket to the Atsupa housing. The vehicle height sensor can be installed at the same time by simply inserting it into the through hole and fixing it with a nut, which requires significantly less man-hours to install than the conventional sensor bracket, which was individually welded to the upper housing. In addition, since the sensor bracket is mounted based on the through hole of the upper housing, the relative position of the vehicle height sensor and the drive magnet can be easily and reliably set.

Furthermore, since the internal gaps of the sensor bracket and sensor harness pull-out plug are filled with synthetic resin material, air leakage is prevented not only from the outer circumference of the sensor harness but also from the internal gap of the sensor harness. Air leakage is also completely prevented, and a complete seal can be easily achieved by simply interposing a simple sealing means that has been commonly used, such as an O-ring, on the tightening and fixing part of the sensor harness pull-out plug. This is something that can bring about great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an enlarged detailed view of the X section in FIG. 1... Telescopic member, 2... Cylinder member, 3...
Rod, 5... Upper housing, 7... Air sealing part, 9... Drive magnet, 10 Vehicle height sensor,
11...sensor bracket, 12...sensor harness drawer plug, 13...nut, 16...synthetic resin material.

Claims (1)

[Scope of utility model registration request] An air-sealed part is formed on the outer periphery of an extensible member consisting of a cylinder member and a rod slidably fitted into the cylinder member, and air is automatically supplied and exhausted into the air-sealed part based on a signal from a vehicle height sensor. In the air suspension, a through hole is provided in the peripheral wall surface of the upper housing which is fixed to the rod and forms the upper wall surface and upper peripheral wall surface of the air sealing part, and the upper part of the sensor bracket holding the vehicle height sensor is provided. Fix the sensor harness pull-out plug to the sensor harness pull-out plug, pull out the sensor harness from the inner cavity of the sensor harness pull-out plug, and fill the gaps in the sensor bracket and the inner cavity of the sensor harness pull-out plug with a synthetic resin material to remove the sensor. By configuring a bracket assembly, fitting the sensor harness pull-out plug into the through hole provided in the upper housing, and tightening and fixing it from the outside of the upper housing with a tightening member,
A vehicle height sensor mounting structure for an automotive vehicle height adjustment device, characterized in that the sensor bracket assembly is mounted at a predetermined position on the inner surface of an upper housing.