CN202614432U

CN202614432U - Axial force sensor

Info

Publication number: CN202614432U
Application number: CN 201220265156
Authority: CN
Inventors: 刘鹏; 王小岗; 汪洋; 张树进; 董宏利; 孙莉
Original assignee: Zhonghang Electronic Measuring Instruments Co Ltd
Current assignee: Zhonghang Electronic Measuring Instruments Co Ltd
Priority date: 2012-05-30
Filing date: 2012-05-30
Publication date: 2012-12-19
Anticipated expiration: 2022-05-30

Abstract

The utility model discloses an axial force sensor. The sensor comprises an elastic body which is shaped like a flat plate. A shaft passing through hole is arranged in the center of the flat plate. A plurality of bolt passing holes are disposed on a circumference of the flat plate. The whole elastic body is similar to a pad of a flange. A right side and a back side of the elastic body are respectively provided with an annular stress groove, wherein the two annular stress grooves have basically the same diameter and are concentric to the shaft passing through hole. Each stress groove is close to the shaft passing through hole, and a resistor strain gauge is attached into each stress groove. The resistor strain gauges are combined to form a Wheatstone balanced bridge to be connected to an external electric appliance. The above sensor is low in height and small in size, is shaped like the pad, can be conveniently to be mounted between a force application shaft of a device and a connection shaft end flange or a bearing part, is stable, is not liable to be damaged, and exhibits high lateral resistance and offset load resistance capabilities. In addition, when axial load is acted on the sensor, a part of the elastic body, inside the stress grooves, effectively deform partially, thereby detecting an axial force value in a sensitive and accurate manner.

Description

Axial force transducer

Technical field

The utility model relates to a kind of force transducer, particularly a kind of sensor that is used to detect axial force between axle and axle, axle and the stressed member that is installed in.

Background technology

In Industry Control, adopt the ring flange form to be connected between the application of force axle of equipment and coupling shaft or the stressed member usually, all adopt force transducer to accomplish basically to axial force detection between the two.Yet; Employable force transducer has only pillar, radial, cartridge type and shearing beam type in the prior art, though this several types sensor can be used for detecting the size of axial force, the problem that they exist is that 1. volumes are big; Limited by installing space, installation difficulty is big; 2. under the situation of bearing big pretightning force, the detection stability of sensor reduces; 3. be installed in after the tie point, sensor self can serve as application of force axle and a coupling shaft or the formed part that is connected in the integral body of stressed member, needs under the big pretightning force effect in connection integral body; The safety coefficient of sensor reduces with the increase of pretightning force; Owing to the anti-bias load ability, sensor very easily damages again, in case sensor occurs unusual or damages; Will directly influence and connect whole security, the whole integrality of destruction connection.

Summary of the invention

The task of the utility model is to solve existing in prior technology the problems referred to above; A kind of axial force transducer is proposed; It can be installed between application of force axle and coupling shaft or the stressed member easily, does not hinder to connect whole security, integrality, and can make exactly the axial force value and detecting.

The technical scheme of accomplishing above-mentioned task is: a kind of axial force transducer; Comprise elastic body, said elastic body is plate, has one to cross shaft through-hole in the middle of the plate face; Periphery has a plurality of bolt via holes; Global shape is similar to the pad of ring flange, on positive and negative two the plate faces of elastic body, respectively have a diameter to equate basically and with cross the concentric belt stress groove of shaft through-hole, the stress groove is near crossing shaft through-hole; Be pasted with strain ga(u)ge in the stress groove, strain ga(u)ge is formed the Hui Sitong balanced bridge and is connected with outside electrical equipment through cable.

In the such scheme, the stress groove has positive and negative two end faces to the elastic body of crossing in the shaft through-hole scope, forward end face or a little more than the dull and stereotyped horizontal frontal plane of elastic body, reverse end face is a little less than the dull and stereotyped antiplane of elastic body.

Said elastomeric plate face outer is square or circular.

Said elastic body is a closed-loop type.

Said elastic body also can be open-type, and an opening is promptly arranged on the elastic body.

The utility model axial force transducer is installed between its adaptive application of force axle head and the ring flange that is connected axle head, or between application of force boss dish and the stressed member, stressed member both can be a solid construction, also can be blind hole structure, can also be axle sleeve.

The advantage of the utility model is: 1. sensor height is low, and volume is little, and is the same just as pad; Can be installed in easily with screw or bolt between the application of force boss dish and coupling shaft end flanges dish or stressed member of equipment; Do not influence the integrality and the security of former syndeton, and two faces of sensor form tight the contact with associated components, very firm; Not fragile, anti-side direction and anti-bias load are very capable; 2. under big pretightning force; Elastic body that the stress groove is peripheral and ring flange are similar to and are rigidly connected; Can not produce distortion, it doesn't matter to make the size of signal of sensor and pretightning force, and when sensor receives axial load; The stress groove can produce effective deformation so that interior elastic body is local, gets final product sensitivity and detects the axial force value exactly.

Description of drawings

Fig. 1 is the schematic perspective view of an embodiment of the utility model.

Fig. 2 is a front schematic view embodiment illustrated in fig. 1.

Fig. 3 is along the cut-open view of A-A line among Fig. 2.

Fig. 4 is an I partial enlarged drawing among Fig. 2.

Fig. 5 is an II partial enlarged drawing among Fig. 3.

Fig. 6 is that the II part is the enlarged drawing of another kind of structure among Fig. 3.

Fig. 7 is the schematic perspective view of second embodiment of the utility model.

Fig. 8 is the schematic perspective view of the 3rd embodiment of the utility model.

Fig. 9 is the schematic perspective view of the 4th embodiment of the utility model.

Figure 10 is first installation illustration intention of the utility model sensor.

Figure 11 is that second of the utility model sensor installs the illustration intention.

Figure 12 is that the 3rd of the utility model sensor installs the illustration intention.

Figure 13 is that the 4th of the utility model sensor installs the illustration intention.

Among the figure: 1. elastic body, 2. cross shaft through-hole, 3. stress groove, 4. strain ga(u)ge, 5. cable; 6. bolt via hole, 7. opening, 8. stressed member, 9. sensor, 10. application of force boss dish; 11. coupling shaft end flanges dish, 12. bolts, 13. application of force axles, 14. coupling shafts.

Embodiment

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

Shown in Fig. 1-5, the utility model axial force transducer comprises elastic body 1; Elastic body 1 is plate, has one to cross shaft through-hole 2 in the middle of the plate face, and periphery is evenly equipped with a plurality of bolt via holes 6; Global shape is similar to the pad of ring flange; The stress groove 3 that an annular is arranged near shaft through-hole 2 on the straight panel face of elastic body 1 also has the stress groove 3 of an annular, positive and negative two stress groove 3 equal diameters and concentric with shaft through-hole 2 on the Buck Plate face of elastic body 1; Be pasted with strain ga(u)ge 4 in the stress groove 3, all strain ga(u)ges 4 are formed the Hui Sitong balanced bridge and are connected with outside electrical equipment through cable 5.

Like Fig. 3, shown in 5, stress groove 3 has positive and negative two end faces to the elastic body of crossing in shaft through-hole 2 scopes, and the forward end face is a little more than the horizontal frontal plane of elastic body 1 flat board, and reverse end face is a little less than the antiplane of elastic body 1 flat board.

Stress groove 3 to the elastic body of crossing in shaft through-hole 2 scopes also can be another kind of form, and promptly the forward end face is in the horizontal frontal plane of elastic body 1 flat board, and reverse end face is a little less than the antiplane of elastic body 1 flat board, and is as shown in Figure 6.

The utility model axial force transducer has polytype, and their essential structure is identical, for example Fig. 1, the outer square and Fig. 8 shown in 7, the outer ring shown in 9; Square have two kinds of closed-loop type (as shown in Figure 7) and open-types (as shown in Figure 1), and circular also have two kinds of closed-loop type (as shown in Figure 9) and open-types (as shown in Figure 8), and open-type is that an opening 7 is arranged on thrum gonosome 1.

Shown in Figure 10-13; The utility model axial force transducer 9 is installed between its adaptive application of force boss dish 10 and the coupling shaft end flanges dish 11 (shown in figure 13), or is installed in (shown in Figure 10-12) between application of force boss dish 10 and the stressed member 8.Stressed member 8 both can be a solid construction (shown in figure 10), also can be blind hole structure (shown in figure 11), can also be axle sleeve (shown in figure 12).

Back, sensor 9 location is with bolt 12 fastening getting final product, and at this moment, elastic body that the stress groove is peripheral and ring flange are similar to and are rigidly connected, and can not produce distortion.When 13 pairs of coupling shafts 13 of application of force axle or stressed member 8 generation axial forces; Axial force acts on the sensor 9 through application of force boss dish 10; At this moment; Stress groove 3 can produce effective deformation with interior elastic body, and change in resistance just takes place strain ga(u)ge 4 and through Wheatstone bridge and cable 5 output electric signal, the axial force value can be detected exactly.

Claims

1. an axial force transducer comprises elastic body, it is characterized in that: said elastic body is plate; Have one in the middle of the plate face and cross shaft through-hole, periphery has a plurality of bolt via holes, and global shape is similar to the pad of ring flange; On positive and negative two the plate faces of elastic body, respectively have a diameter to equate basically and with cross the concentric belt stress groove of shaft through-hole; The stress groove is pasted with strain ga(u)ge near crossing shaft through-hole in the stress groove, and strain ga(u)ge is formed the Hui Sitong balanced bridge and is connected with outside electrical equipment through cable.

2. according to the described axial force transducer of claim 1; It is characterized in that: stress groove to the elastic body of crossing in the shaft through-hole scope has positive and negative two end faces; Forward end face or a little more than the dull and stereotyped horizontal frontal plane of elastic body, reverse end face is a little less than the dull and stereotyped antiplane of elastic body.

3. according to claim 1 or 2 described axial force transducers, it is characterized in that: said elastomeric plate face outer is square or circular.

4. according to claim 1 or 2 described axial force transducers, it is characterized in that: said elastic body is a closed-loop type.

5. according to the described axial force transducer of claim 3, it is characterized in that: said elastic body is a closed-loop type.

6. according to claim 1 or 2 described axial force transducers, it is characterized in that: said elastic body is an open-type.

7. according to the described axial force transducer of claim 3, it is characterized in that: said elastic body is an open-type.