Weighing scales – Structural installation – Vehicle
Patent
1997-09-18
1999-04-06
Gibson, Randy W.
Weighing scales
Structural installation
Vehicle
177210R, 177DIG9, G01G 1902
Patent
active
058921818
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a structure for mounting sensing devices for measuring a load which are to be disposed in a vehicle such as a truck.
BACKGROUND ART
The measurement of a load of a vehicle is performed mainly on a large vehicle such as a truck and, for example, for the purposes of preventing traffic accidents such as turnover due to overload, and of preventing deterioration of vehicles and road surfaces from being stimulated.
Conventionally, a load of a vehicle is measured by placing a vehicle to be measured on a platform weighing machine which is so called "KANKAN" in Japanese. The facilities are large scaled, and necessitate a wide installation space, so that the number of platform weighing machines which can be installed is limited. Therefore, a number of vehicles cannot be measured at a time. Additionally, the installation cost is increased.
In recent years, a load measuring apparatus which is mounted on a vehicle itself to measure a load is provided.
In a conventional load measuring apparatus which is mounted on a vehicle, generally, sensing devices for measuring a load, for example, strain gauge sensors are attached to arcuate leaf springs which are interposed between a rear body frame and axle shafts, and the load is calculated based on the total of measured values of the sensing devices.
Hereinafter, the structure of a conventional load measuring apparatus which was proposed by the applicant will be described with reference to FIGS. 8 and 9.
FIG. 8 is an exploded perspective view of a large vehicle such as a truck and showing a vehicle portion in which the load measuring is performed by the load measuring apparatus. In the figure, 31 designates a leaf spring which functions as a suspension, and 32 designates a rear body frame.
Two yoke brackets 33 are fixed to the rear body frame 32 with being separated from each other in the longitudinal direction by a distance corresponding to the size of the leaf spring 31. One end of the leaf spring 31 is swingably coupled to one of the brackets 33 via a cylindrical pin 33A.
A yoke shackle 34 is swingably coupled to the other bracket 33 via a cylindrical shackle pin 3. The other end of the leaf spring 31 is swingably coupled to the shackle pin 34 via a cylindrical pin 34A. As a result, the leaf spring 31 is attached to the rear body frame 32. An axle shaft (not shown) is attached to the rear body frame 32 via the leaf spring 31.
FIG. 9(a) is a section view of the shackle pin 3 and showing a location of a sensing device in the load measuring apparatus proposed by the applicant, and FIG. 9(b) is a view looking in the direction of the arrow A of FIG. 9(a).
As shown in FIG. 9(a), an insertion hole 33b for the shackle pin 3 is formed on each of side faces 33a of the yoke bracket 33. On one side face 33a, as shown in FIG. 9(b), a slit 33c which elongates from an end of the side face to the insertion hole 33b is formed.
In addition, as shown in FIG. 9(a), a through hole 33d which elongates in a direction perpendicular to the insertion hole 33b and passes through the portions of the side face 33a on both sides of the slit 33c is formed in the one side face 33a.
The through hole 33d is configured in such a manner that, in a condition where a fixing bolt 16 for the shackle pin 3 is inserted as shown in FIG. 9(b), the fixing bolt 16 can be engaged with an annular groove 3a formed on the surface in the vicinity of an end portion of the shackle pin 3 as shown in FIG. 9(a).
An insertion hole 34a having an inner diameter corresponding to the insertion hole 33b is formed in a basal portion of the shackle 34.
The shackle 34 is attached to the bracket 33 in the following manner.
First, the shackle pin 3 is inserted into the insertion holes 33b, 34a, and 33b of the side faces 33a of the bracket 33 and the shackle 34 which are mutually positioned. The fixing bolt 16 is inserted into the through hole 33d, so as to be engaged with the groove 3a of the shackle pin 3.
Next, the gap of the slit 33c is reduced by screw motion of a nut 16A which is screwed onto
Gibson Randy W.
Yazaki -Corporation
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