JPS58150801A - Car height detector - Google Patents

Abstract

PURPOSE:To accurately detect the vehicle height constantly by such an arrangement wehrein a magnetic flux generating element which moves together with a rod freely movable in relation therewith is provided inside a cylindrical body so that its movement exceeding a certain fixed range can be restricted and wherein two sets of magnetic flux detector are installed to the cylindrical body. CONSTITUTION:A cylindrical body 1 is installed to the body of a car through a ball joint 2 and at the same time, a rod 15 is connected to the wheel axle of the car through a ball joint 18 and the inserted length of the rod 15 into a hollow portion 3 varies by the rise or fall of the car height. As the inserted end 31 of the rod 15 is moved exceeding one end 32 of a cylindrical memeber 14 in the direction of A (in the direction of higher car height), a protective element 4 of a magnet 5 is brought to contact with the end 32, and the movement of the magnet 5 in the direction of A is hampered. As the rod 15 is moved in the direction of B, the inserted end 31 is brought to contact with the protective element 4 and they are applied with force in the direction of A by a coil spring 6. The magnetic flux of the magnet 5 is detected by detection elements 25, 26 and the change of the car height is accurately detected at all times by relative strength of those detected signals.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention sets the vehicle height to a predetermined height based on detecting the distance between the vehicle body and the axle, that is, the vehicle height, in a vehicle height adjustment device or the like. The vehicle height detector used in such a vehicle height adjustment device must be able to accurately detect high, medium, and low vehicle heights.
It is required to be able to reliably identify whether it is located in the middle or low position.

Conventionally proposed vehicle height detectors have difficulty distinguishing between cases where the vehicle height is higher than a predetermined height and cases where the vehicle height is lower than a predetermined height. To deal with this, rounding can be done by memorizing the state of the vehicle height each time it changes to above or below a predetermined height, or by, for example, making sure that the detected object is always detected by the detection element at a low position. As a result of the necessity of forming the object to be detected into a long length, the structure becomes complicated and cannot always be satisfied.

In addition, if the vehicle height condition cannot be memorized electrically, sufficient measures must be taken to prevent malfunctions caused by noise.

The present invention addresses the above points, and its purpose is to reliably obtain a detection signal that can easily identify whether the vehicle is high or low even when the vehicle height is above or below a predetermined height. Our goal is to provide a vehicle height detector that can.

Next, a preferred example of the member according to the present invention will be explained based on the drawings.

In FIGS. 1 and 1E2, a ball joint 2 is provided at one end of a cylinder 1, and the cylinder 1 is attached to the vehicle body via the joint 2. A hollow part 3 in the cylinder 1 is provided with nine disk-shaped magnets 5 held by a retainer 4 so as to be movable in directions A and B relative to the cylinder l. The body 4 includes a coil spring 6 arranged in the hollow part 3.
is urged in the direction A by the stretching force of. The relatively flexible protector 4 made of resin or the like is composed of a hollow spherical part 6a and a cylindrical part 7 extending from the spherical part 6a.
A magnet 5 is fitted within the spherical portion 6a, and a cylindrical portion 7 is fitted within the spring 6. From one end of the cylindrical part 7 to the spherical part 6
A plurality of notch colors 8 are provided on the protective body 4, and a magnet 5 as a magnetic flux generator can be fitted into a spherical S6 PC by expanding the diameter of the cylindrical portion 7. A lid 9 that closes the hollow part of the spherical part 6a is fixed to the spherical part 6a. A narrow annular gap 10 is formed between the protector 4 and the cylindrical body 1, and the two chambers 11 and 12 formed by defining the hollow part 3 by the protector 4 are separated by the gap 10. communicated via. The fill is closed at one end by the cylinder 1 itself at 13V. A cylindrical member 14 serving as a blocking member disposed in the hollow portion 3 is fixed to the cylindrical body 1, and a rod 15 is disposed within the cylindrical member 14 relative to the member 14, that is, relative to the cylindrical body 1. The rod 15 and the cylindrical member 14 are inserted movably in the entry direction and the B direction.
There is also a ring between! 1918 has been formed. The rod 15 is fitted into one end of the cylindrical body 1, passes through a nine-rod guide 17, and protrudes to the outside of the cylindrical body 1. A ball joint 18 is provided at the protruding end of the rod 15. The rod 15 is connected to the axle via 18.

A passage 19 is formed between the guide 17 and the rod 15, which communicates the seal 11916 with the outside of the cylindrical body 1. 7 langes 20 and 100 indicaments integrally formed on the cylinder body 1
8, there is a retractable cylindrical dustproof cover 21. The cover 21 prevents dust from adhering to the surface of the rod 15. The nine air filters 22 surrounded by the cover 21 communicate with the outside of the cover 21 via a filter 23 provided at one end of the rod 15 and a nine through hole 24 bored in the cover 21. The filter 23 prevents dust from entering the space 22 through the filter 24 .

Magnetic detection elements for detecting the magnetic flux of the magnet 5, such as Hall elements 25 and 26, are attached to the holding member 27 and arranged on the outer surface of the cylinder 1, and the detection signals from the elements 25 and 26 are transmitted to the connector pin 28. and 29 to the outside.

In the vehicle height detector 30 configured in this manner, the insertion length of the rod 15 into the hollow portion 3 changes depending on the height of the vehicle. When the vehicle height is gradually raised from the middle level to the high level, the rod 15 is moved in the entry direction and sequentially pulled out from the hollow s3, and as shown in FIG.
When the rod insertion end 31 is moved further in the entry direction, the protector 4 contacts the end 32, preventing the protection member 4 from moving in the entry direction, and the rod insertion end 31 and the protector 4 are prevented from coming into contact with each other. It will be canceled. In this state, the magnetic flux of the detection elements 25 and 26 stones 5 is substantially detected. When the vehicle height changes sequentially from this high position to the lower side, the rod 15 is moved in the B direction and sequentially inserted into the hollow part 3, and when the insertion end 31 is moved further in the B direction than the end 32, , the insertion end 31 and the protector 4 come into contact with each other, and the protector 4 is moved in the direction B along with the movement of the rod 15, and when the protector 4 is also moved to the position shown in FIG. The detector 2 is substantially sensitive to the magnetic flux from the magnet 5 and substantially detects the magnetic flux of the magnet 5.
Conversely, the magnet 6 becomes insensitive to the magnetic flux of the magnet 5 and substantially no longer detects the magnetic flux of the magnet 5. Furthermore, when the vehicle height is lowered to the lower side, more rods 15 are inserted into the cylinder 1, and the protector 4 is moved more in the direction B as shown in FIG. and 260 become substantially insensitive to the magnetic flux of magnet 5 and substantially no longer detect the magnetic flux of magnet 5.

both are substantially sensitive to the magnetic flux from magnet 5;
When receiving a signal detecting the magnetic flux of the magnet 5 from both of the detection elements 25 and 60, it is assumed that the vehicle height is at a high level. When receiving a signal from the detector 26 that the magnetic flux of the magnet 5 is not detected, it is assumed that the vehicle height is at an intermediate level, and when receiving a signal from both the detectors 25 and 260 that the magnetic flux of the magnet 5 is not detected. By assuming that the vehicle height is low, the vehicle height adjustment device can be operated appropriately. That is, the vehicle height detector 30 can reliably detect whether the vehicle height is high or low even if the vehicle height is higher or lower than a predetermined value. In addition, in the detector 30, chambers 11 and 12
Because the chamber 11 is in narrow communication with the protector 4 via ff1O, in other words, the chamber 11 functions as an air damper for the protector 4, which prevents the protection unit 4 from vibrating due to resonance with vehicle vibrations. Therefore, the protection body 4 gradually moves without responding to the rapid movement of the rod 15 in the entry direction.
Therefore, by placing the partheno detection @301c in the A direction, it is possible to eliminate the impact of the detection element 25 and the vibration of the protector 4 itself due to this impact.

In the specific example described above, the blocking member was formed separately from the cylindrical body 1, but the present invention is not limited to this, and the blocking member may be formed integrally with the cylindrical body 1. The spring 6 is not necessarily provided, and the p protector 4 may be moved in the inward direction by gravity.

As described above, according to the present invention, it is possible to reliably obtain signals indicating the three states of rounding and vehicle height that prevent the magnetic flux generating body from moving beyond a certain level in one direction, and to prevent the vehicle height from displacing beyond a certain level. However, the direction of the displacement can be accurately detected. Moreover, since an air damper can be formed, unnecessary vibrations can be eliminated and malfunctions can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a preferred embodiment of the present invention; FIG.
The figure is a detailed plan view of the protector etc. shown in Figure 1, and @Figure 3 is the detailed plan view of the protector etc.
FIG. 4 is an explanatory diagram showing how the vehicle height is detected in the specific example shown in FIG. 1, and FIG. 4 is an explanatory diagram showing how the vehicle height is detected in the specific example shown in FIG. l...Cylinder body, 5...Curve/magnet, 14...Blocking member, 15...
Song...Rod, 25.26...Negative air detection element.

Claims (5)

[Claims] (1) A cylindrical body, a nine-magnetic flux generator disposed within the cylindrical body so as to be movable relative to the cylindrical body, one end of which is inserted into the cylindrical body, and one end of the cylindrical body inserted into the cylinder, and one end of the cylindrical body inserted into the cylindrical body. a rod that protrudes outward from the cylindrical body and is movable relative to the cylindrical body;
A blocking member that prevents the magnetic flux generating body from moving beyond a predetermined amount toward one end of the cylinder, and a blocking member that prevents the magnetic flux generating body from moving toward the one end of the cylinder by the blocking member. substantially detects the magnetic flux of the magnetic flux generating body, and when the magnetic flux generating body is moved to a first position within the cylinder by the rod, one substantially detects the magnetic flux of the magnetic flux generating body and the other substantially no longer detects the magnetic flux of the magnetic flux generator, and the rod causes the magnetic flux generator to move away from one end of the cylinder from the first position to the second position.
A vehicle height detector comprising 91 pairs of magnetic detection elements provided on a cylindrical body so that both do not substantially detect the magnetic flux of the magnetic flux generating body when moved to the 0 position. (2) A narrow gap is formed between the magnetic flux generating body and the cylindrical body, and the two wheels in the nine cylindrical body defined by the magnetic flux generating body are communicated through this narrow gap. Vehicle height detector according to scope item (1). (3) The vehicle height detector according to claim (1) or (2), wherein the magnetic flux generator is biased toward one end of the cylindrical body by a spring. (4) The vehicle height detector according to any one of claims S (1) to (3), in which the magnetic flux generator is held by a holding body and consists of nine magnets. (5) The vehicle height detector according to any one of claims (1) to (4), wherein the cylinder is connected to the vehicle body side and the rod is connected to the axle side.