JPH0737929Y2 - Vehicle height adjustment device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle height adjusting device for a fluid suspension system such as an air suspension system, a hydraulic suspension system, and a hydraulic / pneumatic suspension system for a vehicle such as an automobile.

2. Description of the Related Art In various fluid suspension systems for vehicles such as automobiles, it is necessary to keep a vehicle body elastically supported by wheels via the suspension system at a constant height from a support surface of the wheels, that is, It is required to keep the height constant,
For this reason, the amount of air supplied to an air spring or the like that constitutes a fluid suspension system is usually adjusted by a constant vehicle height maintaining device. In order to keep the vehicle height constant regardless of changes in load, this constant vehicle height holding device is generally provided between the leveling valve fixed to the vehicle body and the axle supporting the vehicle body. The link mechanism is arranged.

That is, although FIG. 5 of the accompanying drawings shows a typical configuration thereof in a schematic view, as shown in the same figure, by means of an axle S via a fluid suspension device (not shown),
A vehicle body B of a vehicle elastically supported via wheels W on the ground G is shown. Between the vehicle body B and the axle S, a height H of the vehicle body B from the ground G is shown. _In order to keep ₀ constant, a constant vehicle height holding device 1 is arranged. The constant vehicle height maintaining device 1 includes a leveling valve 2 fixed to a vehicle body B, a substantially horizontal lever 3 having one end connected to its operating member, and an upper end freely pivotable at the other end. Link 4 consisting of a nearly vertical link 4 connected together.
The lower end portion of is pivotally connected to the axle S.

In such a constant vehicle height maintaining device 1, in the state shown in FIG. 5, the upper and lower ends of the link 4 are respectively
Spacing or length between the pivotable point of attachment to the lever 3 and the axle S is set to l _0, in the case of the length l ₀ of the link 4, a predetermined vehicle body B off the ground G Initial Standard vehicle height
The vehicle height is kept at H ₀ , and the vehicle height is
If it fluctuates from H ₀ , the vertical movement of the axle S
It is transmitted to the actuating member of the leveling valve 2 via the link 4 and the lever 3, and by this actuation, the supply of fluid such as compressed air to the air spring or the like constituting the fluid suspension system is adjusted. And set the vehicle height to the initial reference vehicle height H _0.
I am trying to hold it.

However, depending on the type of vehicle, the state of use, etc., it may be required that this initial reference vehicle height H ₀ can be changed as necessary.

In this way, in such a fluid suspension system, various systems have already been proposed in order to respond to a case where it is required to change the initial reference vehicle body height H ₀ .

That is, the following methods are currently known.

(1) A system in which the fluid suspension system itself is completely electronically controlled (2) A system in which a plurality of valves are combined with a fluid suspension system, and these are appropriately operated (3) A constant vehicle height as shown in FIG. In the holding device, the link 4 may be changed to a link having a different length, or the link 4 may be configured as a turnbuckle type and manually changed.

However, all of these known methods are complicated and expensive, and there was no requirement to change the vehicle height at the beginning of production, but after that, when this need occurred, the It is not possible to add a vehicle height adjustment mechanism, or even if it is possible, there is a problem that the constant vehicle height maintenance device needs to be remodeled and its use is inconvenient. It was

Therefore, the present invention solves various problems in the conventionally known methods, has a simple structure, is inexpensive, can easily adjust the vehicle height, and needs Accordingly, it is an object of the present invention to obtain a vehicle height adjusting device that can easily change to a vehicle height adjusting method.

Means for Solving the Problems A vehicle height adjusting device according to the present invention is a vehicle height maintaining device in which a link is movably provided on a vehicle body via a leveling valve and a lever. The upper rotor shaft and the lower rotor provided at both ends of the rotor, male screws formed on the rotor shafts having different screw directions from each other, and screwed to the male screws via female screws having different screw directions from each other. A configuration including an upper tubular link and a lower tubular link, a pivot member provided at an end of each tubular link, and a rotary encoder provided in a motor case of the motor for detecting the rotation speed of the rotor. Is.

More specifically, the length of the upper tubular link is shorter than that of the lower tubular link.

In the vehicle height adjusting device according to the present invention, when the upper rotor shaft and the lower rotor shaft having different screw directions are rotated in the same direction by rotating the motor, the upper tubular link moves upward or downward, Since the lower tubular link moves downward or upward, the link expands and contracts and the vehicle height can be freely moved up and down. Further, since the rotation speed of this motor is detected by the rotary encoder, the rotation and stop of this motor can be controlled with high accuracy, and the vehicle height can be adjusted with high accuracy.

Embodiment Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 4 of the accompanying drawings showing an embodiment thereof.

The present invention is basically a constant vehicle height maintaining device 1 using a leveling valve 2, a lever 3, a link 4 and the like as shown in FIG. It is characterized in that a mechanism for changing it by a mechanical means is integrally incorporated.

That is, FIG. 1 shows the first embodiment, but in this embodiment, the link 4 in FIG.
But a short length of upper tubular link 11 and a lower tubular link 12
Is divided into bets, respectively upper and lower ends of each tubular links 11 and 12, respectively, fitted with a pivot member 11 ₁ and 12 _1, via these, respectively, can be freely connected pivot lever 3 and the axle S And Further, the respective upper and lower tubular link 11, respectively, within the lower portion and upper portion, a certain length, for example, providing the right internal thread 11 ₂ and the left internal thread 12 _2.

In addition, the upper and lower tubular links 11, 12 are coaxially vertically spaced and aligned, with a coaxial type motor or ultrasonic motor 13 disposed coaxially and vertically between them. substantially hollow cylindrical motor case 13 ₀ of a cylindrical rotor 14 which is rotatably mounted in the interior of 13,
Right and left female threads 12 formed on the lower and upper end portions of the upper and lower rotor shafts 15 and 16 respectively extending vertically from the opposite upper and lower end portions, respectively, on the upper and lower rotor shafts 15 and 16, respectively. Forming a right male thread 15 ₁ and a left male thread 16 ₁ corresponding to ₂ and a left female thread 12 ₂ , respectively screwing each of these male and female thread pairs 11 ₂ , 15 ₁ and 12 ₁ , 15 ₁ , respectively;
As a result, the upper and lower hollow tubular links 11 and 12 and the rotor shaft 1
By 5,16, one link member with adjustable length is formed.

Inside the motor case 13 _0, in the vicinity of the first end surface of the rotor 14, a rotary encoder for detecting the rotational speed of the rotor shaft 15, 16, or by installing an appropriate rotational speed sensor 17 placed . Furthermore, surrounding in this embodiment, in order to the motor case 13 ₀ along with the rotation of the rotor 14 is prevented from rotating, for example, the lower end portion of the motor case 13 _0, the upper end of the lower tubular link 12 So that they engage loosely, for example due to the square cross section.

Although one embodiment of the present invention has such a configuration,
When a change in vehicle height is requested, the motor 13 is energized,
This can be done by rotating the rotor 14 in either direction and thereby adjusting the spacing between the upper and lower tubular links 11, 12 to increase or decrease. This state is schematically shown in FIGS. 2 and 3. That is, if it is required to adjust the initial reference vehicle height H ₀ shown in FIG. 5 to a high level, the rotor 14 of the motor 13 is moved to the upper and lower hollow tubular links 11 and 12.
As shown in FIG. 2, the reference length l ₀ of the link 4 is changed by rotating so as to increase the interval between the reference lengths.
By adjusting the length l _H longer than l ₀ , the initial reference vehicle height H ₀ can be set to a vehicle height H _H larger than that.

Alternatively, conversely, by rotating the rotor 14 of the motor 13 in the opposite direction, the length of the link 4 is adjusted to a length l _L shorter than the reference length l ₀ , as shown in FIG. The vehicle height can be set to a vehicle height H _L that is lower than the initial reference vehicle height H ₀ .

Further, in these cases, the length 1 of the link 4 can be adjusted to a desired length by appropriately controlling the rotation speed of the rotor 14 by the operation of the rotary encoder 17 or the like.

Next, FIG. 4 shows another embodiment of the present invention.

In this embodiment, compared to the embodiment shown in FIG.
Upper tubular link 11, is omitted, fixed pivot member 11 ₁ directly to the upper end of the motor case 13 _0, The lower tubular link 12, a long threaded shaft was cut external threads 18 ₀ on the outer periphery 18 and, in its lower end to form a pivot member 12 _1, further along the central axis of the rotor 14, the external thread 18 ₀
Forming an internal thread 14 ₀ corresponding to, these male and female screws 14 ₀
And 18 _0, the point which is adapted to the screw engagement, are different.

It is obvious that the second embodiment can also perform the same operation as the first embodiment shown in FIG.

Effect of the Invention The present invention has the above-described configuration and operation, and therefore, the vehicle height of a vehicle equipped with a fluid suspension system can be easily and remotely adjusted, and is present. Even when the fluid suspension device is changed to one having a vehicle height adjusting method, it is possible to perform the effect very easily without requiring major modification.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention, FIGS. 2 and 3 are explanatory views showing the operation thereof, and FIG.
FIG. 5 is a front view showing a second embodiment of the present invention, and FIG. 5 is a schematic view showing an example of a typical constant vehicle height maintaining device of a fluid suspension system. 1 ... Constant vehicle height maintaining device, 2 ... Leveling valve, 3 ...
Lever, 4 ... Link, 11, 12 ... Hollow tubular link, 11 ₂ , 12
₂ ... Female thread, 13 ... Motor, 14 ... Rotor, 14 ₀ ... Female thread, 1
5,16… Upper and lower rotor shafts, 15 ₁ , 16 ₁ … Male thread, 17…
Rotary encoder 18 ... screw shaft, 18 ₀ ... male screw, B ...
Body, G ... Ground, S ... Axle.

Claims (2)

[Scope of utility model registration request] 1. A vehicle height adjusting device, wherein a link (4) operably provided on a vehicle body (B) via a leveling valve (2) and a lever (3) is provided on an axle (S). The link (4) is formed on the upper rotor shaft (15) and the lower rotor shaft (16) provided on both ends of the rotor (14) of the motor (13) and the rotor shafts (15, 16) and is screwed to each other. The male screw (15 ₁ , 16 ₁ ) having a different direction and the upper tubular link (1) screwed to each male screw (15 ₁ , 16 ₁ ) via female screws (11 ₂ , 12 ₂ ) having mutually different screw directions.
1) and the lower tubular link (12) and each tubular link (1)
Pivot members (11 ₁ , 12 ₁ ) provided at the ends of ₁ , 12)
If, provided in the motor casing (13 ₀₎ of the motor (13), said rotor (14) of the rotary encoder for detecting a rotational speed (17), the vehicle height, characterized in that it is composed of Adjustment device. 2. The vehicle height adjusting device according to claim 1, wherein the length of the upper tubular link (11) is shorter than that of the lower tubular link (12).