CN201273838Y

CN201273838Y - Double-shear girder-type weighing transducer

Info

Publication number: CN201273838Y
Application number: CNU200820030229XU
Authority: CN
Inventors: 刘鹏; 王小岗; 杨乘懿; 谭义峰; 张树进; 石荣武; 孙莉; 段鹏
Original assignee: Zhonghang Electronic Measuring Instruments Co Ltd
Current assignee: Zhonghang Electronic Measuring Instruments Co Ltd
Priority date: 2008-09-10
Filing date: 2008-09-10
Publication date: 2009-07-15
Anticipated expiration: 2018-09-10

Abstract

The utility model provides a double-shear beam type weighing sensor which comprises a base 8 and an elastic body 5 connected with the base through a bolt 4, wherein, two parallel grooves 6 are formed on the bottom surface of the elastic body 5; two grooves 9 corresponding to the positions of the grooves 6 of the elastic bodies are formed on the upper surface of the base 8; a supporting body assembly is respectively arranged in each group of the two groups of grooves which are corresponding to each other; each supporting body assembly consists of two or more than two upright post 7 in the same shape through in-line arrangement; and one end of each upright post 7 is a spherical surface or a conical surface, or both ends of each upright post 7 are spherical surfaces. The grooves have the effect that the supporting body assemblies are accurately positioned, the elastic bodies are supported by supporting bodies at both ends, point contact connection is formed between the elastic bodies and the base, the simple point contact supporting structure is favorable for the free deformation and reset of the elastic bodies, the shock resistance and unbalance loading resistance capability is strong, and the measuring accuracy and the stability of the sensor are high.

Description

A kind of double shear beam type LOAD CELLS

Technical field

The utility model belongs to the parts of weighing apparatus, and what be specifically related to is a kind of double shear beam type LOAD CELLS.

Background technology

Double shear beam type LOAD CELLS has been widely used in all kinds of electronic-weighing equipment such as electronic vehicle weighing apparatus, track scale at present.The elastic body two ends of existing double-shear beam sensor are fixed on the base support body, and this structure is unfavorable for elastomeric Free Transform and resets that the measuring accuracy and the degree of stability of sensor are low.

The utility model content

Existing double shear beam type LOAD CELLS precision is hanged down and the deficiency of poor stability in order to overcome, and the utility model proposes a kind of some contact freely-supported and supports double shear beam type LOAD CELLS.

Point contact freely-supported supports double shear beam type LOAD CELLS, comprise base and the elastic body that is connected with base by bolt, it is characterized in that: on the described elastomeric bottom surface twice groove is arranged, it is the elastic body groove, this twice groove is respectively near position, edge, two ends, the elastic body left and right sides, its axis is parallel to each other and is parallel with elastomeric broadside, the upper surface of described base also has the twice groove, it is base groove, described base groove is corresponding with described elastic body groove location, in the corresponding groove supporter assembly is arranged respectively up and down at described two groups, described supporter assembly is to be rearranged by two or more identical shaped column in-lines, one end of described column is the sphere or the conical surface, and perhaps two ends are sphere, and each column has at least an end a bit to contact with the bottom formation of respective slot.

In the utility model sensor, the effect of groove is to make the accurate positioning of supporter assembly, the supporter assembly is propped up elastic body and make from two ends and forms the some contact between elastic body and the base and connect, this some contact freely-supported supporting construction helps the Free Transform of spring shape body and resets, and shock resistance, anti-bias load ability are strong, and the measuring accuracy of sensor increases substantially, be better than OIML standard C 3, C4, C5 level, NTEP standard 5000 S/MIII, 10000 S/M IIIL levels.

Description of drawings

Fig. 1 is the organigram of the utility model embodiment 1.

Fig. 2 is a left side partial sectional view embodiment illustrated in fig. 1.

Fig. 3 is the organigram of the utility model embodiment 2.

Fig. 4 is a left side partial sectional view embodiment illustrated in fig. 2.

Fig. 5 is the schematic bottom view of elastomer member among Fig. 1 and Fig. 3.

Fig. 6 is the upper surface synoptic diagram of base member among Fig. 1 and Fig. 3.

Among the figure: 1. pressure bearing head, 2. pressure-bearing steel ball, 3. strainometer, 4. bolt, 5. elastic body, 6. the elastic body groove 7. supports steel ball, 8. base, 9. base groove.

Embodiment

Below in conjunction with drawings and Examples the utility model is described further.

In embodiment shown in Figure 11, bottom surface at elastic body 5 respectively has one section configuration to be the round groove that lacks shape near position, edge, two ends, the left and right sides, be elastic body groove 6, the axis of twice groove is parallel to each other and parallel with the broadside of elastic body 5 (as Fig. 5 and shown in Figure 1); The upper surface of base 8 also has the twice groove, and promptly base groove 9, and the position of groove 9 is corresponding with groove 6, its section configuration and also groove 6 identical (as Fig. 6 and shown in Figure 1).In the present embodiment, each freely is placed with two steel balls 7 as the supporter assembly between elastic body and the base in the groove of the left and right sides, the radius of steel ball is less than the radius-of-curvature of groove, like this with regard to make elastic body and base all with support steel ball and keeping contacting of a point at separately bottom portion of groove, just realized that also the some contact between elastic body and the base connects.

Steel ball is that two ends described in the utility model are a kind of special shape of the column of sphere, and it can freely be placed in the groove.When the length of column greater than its two ends spherical radius and the time, then column must vertically be placed in the groove.The spherical radius at column two ends less than the radius-of-curvature of groove be make elastic body and base all with the pacing items of column two ends holding point contact condition.Embodiment central post quantity at other can be a plurality of.

Equal the radius-of-curvature of base groove 9 when the spherical radius of column lower end head, and the spherical radius of column upper end is during less than the radius-of-curvature of elastic body groove 6, have only the upper end of column and the bottom surface holding point contact condition of elastic body groove 6, this form has guaranteed that still the some contact between elastic body and the base connects.

In embodiment shown in Figure 32, the bottom of base groove 9 is the plane, the section configuration of elastic body groove 6 lacks shape for circle, the lower surface of each column is the plane in the supporter assembly, upper end is a sphere, spherical radius is less than the radius-of-curvature of elastic body groove 6, and this design has guaranteed the some contact condition of elastic body 5 with the column upper end, has also just guaranteed the some contact condition of elastic body and base.

Another kind of structural form as embodiment 2, the bottom section shape of base groove 9 is that circle lacks shape, elastic body groove 6 is the plane, the upper surface of each column is the plane in the supporter assembly, the lower end is a sphere, this design has guaranteed the some contact condition of base 8 with column lower end, has realized that still elastic body is connected with the some contact of base.

In embodiment 2, an end of each column is the plane in the supporter assembly, and the other end can be a cone, when planar ends is placed on the bottom in the groove on plane the time, the tip is just inconsistent with the bottom portion of groove of relative direction naturally, has also guaranteed the some contact condition of elastic body and base.

Be not difficult to expect by embodiment 2, the supporter assembly can directly become as a whole with elastic body 5 or base 8 in its residing groove location, as long as the other end of each column is sphere or cone in the supporter assembly, can realize that elastic body is connected with the some contact of base.

Claims

1. double shear beam type LOAD CELLS, comprise base (8) and the elastic body (5) that is connected with base (8) by bolt (4), it is characterized in that: there is twice groove (6) bottom surface of described elastic body (5), this twice groove is the position, edge, two ends, the left and right sides of close elastic body (5) respectively, its axis is parallel to each other and is parallel with the broadside of elastic body (5), the upper surface of described base (8) also has twice groove (9), base groove (9) is corresponding with elastic body groove (6) position, in the corresponding groove supporter assembly is arranged respectively up and down at described two groups, described supporter assembly is to be rearranged by two or more identical shaped column (7) in-lines, one end of described column (7) is the sphere or the conical surface, perhaps two ends are sphere, and each column (7) has at least an end a bit to contact with the bottom formation of respective slot.

2. according to the described double shear beam type of claim 1 LOAD CELLS, it is characterized in that: the section configuration of described elastic body groove (6) and base groove (9) is circle and lacks shape, the two ends of described column (7) are sphere, and the radius of sphere is less than the radius-of-curvature of groove.

3. according to the described double shear beam type of claim 1 LOAD CELLS, it is characterized in that: the bottom of described base groove (9) is the plane, the section configuration of elastic body groove (6) lacks shape for circle, an end face of each column (7) is the plane in the supporter assembly, the other end is sphere or cone, spherical radius is less than the radius-of-curvature of elastic body groove (6), and the planar ends of column is arranged in base groove (9).

4. according to the described double shear beam type of claim 1 LOAD CELLS, it is characterized in that: the bottom section shape of described base groove (9) is that circle lacks shape, elastic body groove (6) bottom is the plane, an end face of each column (7) is the plane in the supporter assembly, the other end is sphere or cone, spherical radius is less than the radius-of-curvature of elastic body groove (6), and the planar ends of column is arranged in elastic body groove (6).