CN201196586Y

CN201196586Y - Double-shear girder-type weighing transducer

Info

Publication number: CN201196586Y
Application number: CNU2008200287393U
Authority: CN
Inventors: 刘鹏; 王小岗; 杨乘懿; 谭义峰; 石荣武; 孙莉; 刘晓臻
Original assignee: Zhonghang Electronic Measuring Instruments Co Ltd
Current assignee: Zhonghang Electronic Measuring Instruments Co Ltd
Priority date: 2008-04-03
Filing date: 2008-04-03
Publication date: 2009-02-18
Anticipated expiration: 2018-04-03

Abstract

The utility model provides a double-shear beam load cell, which comprises a base (6), an elastic body (4) connected to the base, a strain gauge attached to the elastic body, a steel ball (2) arranged on the upper end of the elastic body and a pressure bearing head (1) arranged on the steel ball. The load cell is characterized in that: the elastic body (4) is supported by two cylinders placed on the base (6); the elastic body (4) is connected with base (6) through bolts and an elastic gasket (3), and the axes of the cylinders (5) are parallel to the width direction of the elastic body (4). With a two end shear supporting structure, the height and the volume of the sensor are reduced, the structure of the sensor is simple, the scale range is increased by 5 to 60t and the precision is improved. The sensor has automatic offsetting function, high anti-impact and anti-unbalanced loading performance, security strength up to more than 300 percent and high reliability.

Description

Double shear beam type LOAD CELLS

Technical field

The utility model relates to a kind of LOAD CELLS, particularly a kind of double shear beam type LOAD CELLS.

Background technology

Double-shear beam type LOAD CELLS is widely used in all kinds of electronic-weighing equipment such as electronic vehicle weighing apparatus, track scale at present.What existing double-shear beam sensor adopted is the two-end fixed beam structure, because the border rigidity of this structural requirement sensor is big, therefore makes the sensor construction more complicated, and profile is also big, and for example: the sensor of 10t range, length * height are 240mm * 225mm; The sensor of 20t～40t range, length * height are 240mm * 225mm; The sensor of 50t range, length * height are 340mm * 26mm.This sensor is installed in and claims also to make on the body that the title body is taller and bigger, the miniaturization and the intensification of incompatibility electronic-weighing equipment.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of profile is little, broad quantum, double shear beam type LOAD CELLS that precision is high.

The technical scheme that realizes above-mentioned purpose is: double shear beam type LOAD CELLS, comprise base, be connected in elastic body on the base, be attached to strainometer on the elastic body, be positioned at the steel ball of elastic body upper end and be placed on pressure bearing head on the steel ball, be placed with two cylinders between described elastic body and the base as support, elastic body is connected with base by bolt, and the axis of described cylinder is parallel with the elastic body Width.

When weighing, give elastic body and base weight transfer by pressure bearing head and steel ball, the strainometer on the elastic body is transformed into the power value electric signal that is directly proportional with the power value.

The utility model has not only reduced the height of sensor significantly owing to adopted above-mentioned both-end freely-supported supporting construction, has reduced volume, and for example: the sensor of 5t～15t range, length * height only are 150mm * 95mm～180mm * 145mm; The sensor of 20t～40t range, length * height only are 170mm * 140mm～190mm * 165mm; The sensor of 50t～60t range, length * height only are 180mm * 165mm～210 * 190mm, and simple in structure, and range ability widens into 5t～60t, and precision is better than OIML standard C 3, C4, C5 level, NTEP standard 5000S/M III, 10000S/M IIIL level.In addition, the utlity model has auto-reset function, shock resistance, the anti-bias load ability is strong, and security intensity reaches more than 300%, the reliability height.

Description of drawings

Fig. 1 is a main-body structure synoptic diagram of the present utility model.

Fig. 2 is the organigram of an embodiment of the utility model.

Fig. 3 is the left view of Fig. 2.

Fig. 4 is an elastomeric front view among Fig. 2.

Fig. 5 is an elastomeric vertical view among Fig. 2.

Fig. 6 is the front view of base among Fig. 2.

Fig. 7 is the vertical view of base among Fig. 2.

Among the figure: 1. pressure bearing head, 2. steel ball, 3. bolt and spring washer, 4. elastic body, 5. cylinder, 6. base, 7. elastic body arc groove, 8. base arc groove, 9,10. spherical groove.

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified.

As shown in Figure 1, the utility model double shear beam type LOAD CELLS includes base 6, be connected in elastic body 4 on the base, be attached to strainometer on the elastic body, be positioned at the steel ball 2 of elastic body upper end and be placed on pressure bearing head 1 on the steel ball, elastic body 4 is by being placed on two cylinders on the base 6 as support, elastic body 4 is connected with base 6 by bolt and spring washer 3, and the axis of described cylinder 5 is parallel with the Width of elastic body 4.

Elastic body 4 cylinder 5 by segmentation on base 6 supports, and forms the freely-supported supporting construction, and this structure can guarantee that the stress point position of sensor is accurate, reduces the interior friction of supporting, and improves measuring accuracy.

In embodiment, base 6 upper surfaces have the groove 8 that two shapes are identical, be parallel to each other near the bead position, the broken ends of fractured bone face shape of groove 8 can be circular arc or other shapes, (as shown in Figure 6 and Figure 7), two grooves 7 are arranged at the bottom of elastic body 4, the broken ends of fractured bone face shape of groove 7 can be circular arc or other shapes, (as Fig. 2 and shown in Figure 4), groove 7 is similar with groove 8 shapes, the position is corresponding, elastic body 4 supports (as shown in Figure 2) by 2～3 sections cylinders 5 that are placed between groove 7 and the groove 8, and is connected with base 6 by bolt 3.

When the broken ends of fractured bone face of groove 7 and groove 8 is shaped as circular arc, its radius-of-curvature more preferably greater than or equal the radius-of-curvature of cylinder.

Claims

1. double shear beam type LOAD CELLS, include base (6), be connected in elastic body (4) on the base, be attached to strainometer on the elastic body, be positioned at the steel ball (2) of elastic body upper end and be placed on pressure bearing head (1) on the steel ball, it is characterized in that: described elastic body (4) is by being placed on cylinder on the described base (6) as support, elastic body (4) is connected with base (6) by bolt and spring washer (3), and the axis of described cylinder (5) is parallel with the Width of elastic body (4).

2. according to the described double shear beam type of claim 1 LOAD CELLS, it is characterized in that: described base (6) upper surface has the groove (8) that two shapes are identical, be parallel to each other near the bead position, two grooves (7) are arranged at the bottom of described elastic body (4), groove (7) is similar with groove (8) shape, the position is corresponding, and described cylinder (5) is positioned between corresponding groove (7) and the groove (8).

3. according to the described double shear beam type of claim 2 LOAD CELLS, it is characterized in that: the broken ends of fractured bone face of described groove (8) is shaped as circular arc, and the broken ends of fractured bone face shape of described groove (7) also is a circular arc.

4. according to the described double shear beam type of claim 3 LOAD CELLS, it is characterized in that: described base (6) and elastic body (4) are gone up the radius-of-curvature of the radius-of-curvature of arc groove more than or equal to cylinder (5).