CN214096285U

CN214096285U - Cylindrical weighing sensor

Info

Publication number: CN214096285U
Application number: CN202023171664.4U
Authority: CN
Inventors: 朱东兴; 姚玉明; 胡文辉; 柯建东
Original assignee: KELI SENSING TECHNOLOGY (NINGBO) CO LTD
Current assignee: KELI SENSING TECHNOLOGY (NINGBO) CO LTD
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-31
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a cylinder formula weighing sensor, including shell and elastomer, the elastomer is cylindricly, and the side of elastomer is provided with four blind holes, and four blind holes set up on the elastomer side with annular array's mode, are provided with the foil gage on the bottom surface of blind hole. The utility model discloses in, the side of elastomer is provided with four blind holes, and the wall thickness of blind hole department elastomer is less, and every blind hole department all forms a stress concentration district, sets up the foil gage on the bottom surface of blind hole, and after the elastomer atress, the stress of four blind hole positions is comparatively concentrated for the stress and the meeting an emergency of this department are also comparatively obvious, thereby have improved section of thick bamboo post formula weighing sensor's measurement accuracy.

Description

Cylindrical weighing sensor

Technical Field

The utility model relates to a weighing sensor, in particular to cylinder formula weighing sensor.

Background

The structure of the weighing sensor is various. The elastic body is a core component in the weighing sensor, the elastic body is provided with the strain gauge, and the elastic body can deform under the stress state, so that the strain gauge deforms accordingly, and the measurement of force is realized through the signal change generated when the strain gauge deforms. The existing cylinder type weighing sensor has a cylindrical elastomer, and a strain gauge is directly arranged on the side surface of the elastomer, so that the existing cylinder type weighing sensor is widely applied to occasions needing to pass through an axis for measuring force in a large range, such as a testing machine, bolt pretightening force detection equipment and the like. However, the existing cylindrical weighing sensor is limited by the use space, the height ratio of the column is low, the stress and the strain generated at the position of the strain foil after the elastic body is stressed are not obvious, and the measurement precision is poor.

Disclosure of Invention

The utility model aims at solving the relatively poor problem of current cylinder formula weighing sensor measurement accuracy, provide a cylinder formula weighing sensor, can effectively solve above-mentioned problem.

The utility model aims at realizing through the following technical scheme: the utility model provides a cylinder formula weighing sensor, includes shell and elastomer, and the elastomer is cylindricly, and the side of elastomer is provided with four blind holes, and four blind holes set up on the elastomer side with annular array's mode, are provided with the foil gage on the bottom surface of blind hole.

The utility model discloses in, the side of elastomer is provided with four blind holes, and the wall thickness of blind hole department elastomer is less, and every blind hole department all forms a stress concentration district, sets up the foil gage on the bottom surface of blind hole, and after the elastomer atress, the stress of four blind hole positions is comparatively concentrated for the stress and the meeting an emergency of this department are also comparatively obvious, thereby have improved section of thick bamboo post formula weighing sensor's measurement accuracy. The signals of the four strain gauges are independently output to form four independent bridge circuits respectively, so that the problem that the precision of an original circumferential patch is poor due to the height ratio of a column is effectively solved, and meanwhile, when unbalance loading occurs, mutual compensation can be realized among the four strain gauges, so that the unbalance loading resistance of the weighing sensor is improved.

Preferably, the strain gauge is a resistive strain gauge.

Preferably, the inner wall of the elastic body is provided with a key groove, and the key groove is arranged along the axial direction of the elastic body.

Preferably, the cross section of the blind hole is circular.

Preferably, the lower end of the elastic body is provided with a lower flange, the upper end of the elastic body is provided with an upper flange, the housing is cylindrical, and one end of the housing is fixed to the lower flange. The shell is made by the stainless steel, is provided with binding post on the shell, and four foil gauges link to each other in binding post respectively, and binding post links to each other with external control equipment.

Preferably, a seal ring is fitted to a side surface of the upper flange, and the seal ring is in contact with an inner wall of the housing. The sealing ring fills the gap between the shell and the side surface of the upper flange, plays a role in sealing, and prevents external dust or liquid from entering the weighing sensor.

Preferably, the elastic body is provided with bosses on an upper end surface and a lower end surface thereof, respectively.

The utility model has the advantages that: the utility model discloses in, the side of elastomer is provided with four blind holes, and the wall thickness of blind hole department elastomer is less, and every blind hole department all forms a stress concentration district, sets up the foil gage on the bottom surface of blind hole, and after the elastomer atress, the stress of four blind hole positions is comparatively concentrated for the stress and the strain of this department are also comparatively obvious, form independent bridge circuit output simultaneously, mutual compensation each other, thereby improved the measurement accuracy of section of thick bamboo column formula weighing sensor.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of an elastomer.

Fig. 3 is a front view of an elastomer.

Fig. 4 is a cross-sectional view of an elastomer.

In the figure: 1. shell, 2, elastomer, 3, binding post, 5, lower flange, 6, upper flange, 7, blind hole, 8, foil gage, 9, boss, 10, sealing washer, 11, keyway.

Detailed Description

The invention will be further described with reference to the following detailed description and accompanying drawings.

Example 1:

as shown in fig. 1 to 4, a cartridge-type load cell includes a housing 1 and an elastic body 2. The elastic body 1 is cylindrical. The side of elastomer 2 is provided with four blind holes 7, and four blind holes 7 set up on the elastomer 2 side in annular array, and the cross section of blind hole 7 is circular. The bottom surface of the blind hole 7 is provided with a strain gauge 8. The strain gauge 8 is a resistive strain gauge. The inner wall of the elastic body 2 is provided with a key groove 11, and the key groove 11 is arranged along the axial direction of the elastic body 2. The lower end of the elastic body 2 is provided with a lower flange 5, and the upper end of the elastic body 2 is provided with an upper flange 6. The housing 1 is cylindrical, and the housing 1 is made of stainless steel. The housing 1 is provided with a terminal 3. The four strain gauges 8 are connected to the connection terminals 3, respectively. One end of the housing 1 is fixed to the lower flange 5. The side surface of the upper flange 6 is embedded with a sealing ring 10, and the sealing ring 10 is contacted with the inner wall of the shell 1. The sealing ring fills the gap between the shell and the side surface of the upper flange, plays a role in sealing, and prevents external dust or liquid from entering the weighing sensor. Bosses 9 are respectively arranged on the upper end surface and the lower end surface of the elastic body 2.

The utility model discloses in, the side of elastomer is provided with four blind holes, and the wall thickness of blind hole department elastomer is less, and every blind hole department all forms a stress concentration district, sets up the foil gage on the bottom surface of blind hole, and after the elastomer atress, the stress of four blind hole positions is comparatively concentrated for the stress of this department is also comparatively obvious with meeting an emergency, and four independent bridge type circuits are constituteed respectively to four strainometers, thereby effectively solve former circumference paster because of the poor problem of column height ratio problem precision. Meanwhile, when unbalance loading occurs, mutual compensation can be realized among the four strain gauges, and therefore the unbalance loading resistance of the weighing sensor is improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.

Claims

1. The utility model provides a cartridge formula weighing sensor, includes shell and elastomer, and the elastomer is cylindricly, its characterized in that: the side of elastomer is provided with four blind holes, and four blind holes set up on the elastomer side with annular array's mode, are provided with the foil gage on the bottom surface of blind hole.

2. The spool-type load cell of claim 1, wherein said strain gauge is a resistive strain gauge.

3. The column-type weighing cell of claim 1, wherein the inner wall of the elastic body is provided with a key groove, and the key groove is arranged along the axial direction of the elastic body.

4. The spool-type load cell of claim 1, wherein said blind bore is circular in cross-section.

5. The column-type weighing cell of claim 1, wherein the lower end of the elastic body is provided with a lower flange, the upper end of the elastic body is provided with an upper flange, the housing is cylindrical, and one end of the housing is fixed on the lower flange.

6. The column-type weighing cell of claim 5, wherein the side of the upper flange is fitted with a sealing ring, and the sealing ring is in contact with the inner wall of the housing.

7. The spool type load cell according to claim 1, wherein the elastic body is provided with bosses on an upper end surface and a lower end surface thereof, respectively.