CN201724729U - Strain beam for highway plate-type weighing sensor - Google Patents

Abstract

The utility model discloses a strain beam for a highway plate-type weighing sensor, which is characterized in that a strain beam substrate (1) passes through a circle center connection line of two adjacent glue filling holes (3); the section of the strain beam substrate (2), which is vertical to a plate surface, is of a groove shape; and generally, the ratio of the width b of the parts which extend outwards from both sides of the upper end of the substrate (1) to the width a of the strain beam substrate is that b/a=(0.6 to 1.5)/1. Compared with a rectangular strain beam which is made of the same material as the strain beam with the grooved section and has the same sectional area as the strain beam with the grooved section, the strain beam with the grooved section has the advantages of large anti-bending modulus, high capability of resisting stress, difficult fatigue and difficultly damaged sensitive element on the substrate. Therefore, even under the condition that the stress is centralized excessively, a load force can be also rapidly dispersed to the whole strain beam so as to provide basic guarantee for improving reliability of the plate-type sensor and prolonging the service life of the plate-type sensor.

Description

The board-like LOAD CELLS strain beam of a kind of highway

Technical field

The utility model relates to the parts of LOAD CELLS, what be specifically related to is the strain beam of the board-like LOAD CELLS of a kind of highway.

Background technology

Along with the continuous increase of highway car flow, the board-like LOAD CELLS frequency of utilization that is installed on the highway is very high, and the number of times of weighing of average every day reaches tens thousand of times.Strain beam is the key position of the board-like LOAD CELLS of highway, the cross sectional shape of the board-like LOAD CELLS strain beam of existing highway is rectangle (crosses two adjacent filler hole circle heart lines and perpendicular to the cross section of plate face), the defective that this strain beam exists is: little, the anti-stress ability of composite bending modulus is relatively poor, particularly when pressure wheel during at position, strain beam termination, be difficult for disperseing owing to local pressure is too concentrated, cause Local Stress-Strain big especially, not only strain beam is tired easily, and the sensitive element on the strain beam matrix also damages easily.Short main cause of board-like LOAD CELLS life-span of existing highway that Here it is.

The utility model content

The purpose of this utility model is to overcome the deficiency of the board-like LOAD CELLS strain beam of existing highway, proposes strong, the tireless strain beam of big, the anti-stress ability of a kind of composite bending modulus, thereby prolongs the serviceable life of the board-like LOAD CELLS of highway.

The technical scheme that realizes above-mentioned purpose is: the board-like LOAD CELLS strain beam of a kind of highway is characterized in that described strain beam matrix is crossed two adjacent filler hole circle heart lines and is flute profile perpendicular to the cross section shape shape of plate face.

According to such scheme, described strain beam matrix cell wall upper end outer width b is generally with the ratio of cell wall thickness a: b/a=(0.6～1.5)/1 is best than being: b/a=0.8/1.

This cross section is the strain beam of flute profile, compare with the rectangle strain beam of identical material, equal cross-sectional area, big, the anti-stress ability of its composite bending modulus is strong, indefatigability, under same load, bending stress on the strain beam matrix reduces significantly, and the sensitive element on the matrix is not fragile, even under stressed situation about too concentrating, load power also can be dispersed to whole strain beam rapidly, and this just provides basic guarantee for reliability and its life-span of prolongation of improving board-like sensor.

Description of drawings

Fig. 1 is partial cross section's shape synoptic diagram of the utility model strain beam.

Fig. 2 is the sectional perspective illustraton of model of an embodiment of the utility model.

Among Fig. 1: 1. strain beam matrix, 2. paster hole, 3. filler hole.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

The board-like LOAD CELLS of the utility model has the identical strain beam matrix 1 of a plurality of shapes, paster hole 2, and filler hole 3 equi-spaced apart distribute.What Fig. 1 and Fig. 2 showed is the local shape in whole strain zone, and the display part is not identical with shape illustrated in figures 1 and 2.The cross section of strain beam matrix 1 (cross two adjacent filler hole 3 circle center line connectings and perpendicular to the plate face) is shaped as a flute profile, as shown in Figure 1.Change beam matrix cell wall upper end outer width b is generally b/a=(0.6～1.5)/1 with the ratio of cell wall thickness a.In present embodiment illustrated in figures 1 and 2, strain beam matrix cell wall upper end outer width b is b/a=0.8/1 with the ratio of cell wall thickness a.

Claims (2)

1. board-like LOAD CELLS strain beam of highway is characterized in that: described strain beam matrix (1) is crossed two adjacent filler hole (3) circle center line connectings and is flute profile perpendicular to the cross section shape shape of plate face.

2. according to the described strain beam of claim 1, it is characterized in that: described strain beam matrix (1) cell wall upper end outer width b with the ratio of cell wall thickness a is: b/a=(0.6～1.5)/1.

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