CN220893538U

CN220893538U - Bellows type tension and pressure sensor

Info

Publication number: CN220893538U
Application number: CN202322231848.2U
Authority: CN
Inventors: 陈文磊; 徐鑫磊
Original assignee: Mick Sensor Shenzhen Co ltd
Current assignee: Mick Sensor Shenzhen Co ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2024-05-03
Anticipated expiration: 2033-08-18

Abstract

The utility model relates to the technical field of sensors, in particular to a bellows type tension and pressure sensor which comprises an elastomer, a connecting structure and a bellows, wherein both ends of the elastomer are provided with contact parts, the end face of the elastomer is provided with a through hole, and the top end and the bottom end of the elastomer face the through hole and are concavely provided with a concentration groove; the connecting structure comprises a first connecting part and a second connecting part, and the two contact parts are respectively connected to two opposite side walls of the first connecting part and the second connecting part; the bellows is sleeved on the elastic body and is tightly connected to two opposite side walls of the first connecting part and the second connecting part, and the inner wall of the bellows and the outer wall of the elastic body jointly form a protection space. The utility model aims to improve the accuracy and stability of a sensor.

Description

Bellows type tension and pressure sensor

Technical Field

The utility model relates to the technical field of sensors, in particular to a bellows type tension and pressure sensor.

Background

The bellows type force transducer has higher strength, and the bellows is welded by laser, so that the protection level is higher, and the weight of an object to be tested can be obtained by utilizing an elastomer, a strain gauge and a wire, so that the bellows type force transducer is widely applied to various electronic weighing equipment such as belt scales, packing scales and the like.

Patent publication number CN219368883U discloses a bellows type weighing sensor, and its foil gage attached position is too far away relative to the through hole position, and the stress is concentrated inadequately, is easily directly influenced the electric bridge by terminal surface force, transverse force and moment of torsion, makes the sensitivity of sensor influenced.

Disclosure of utility model

The utility model mainly aims to provide a bellows type tension pressure sensor, which aims to improve the accuracy and stability of the sensor.

In order to achieve the above object, the present utility model provides a bellows type tension pressure sensor, which comprises an elastic body, a connecting structure and a bellows:

The two ends of the elastic body are respectively provided with a contact part, the end face of the elastic body is provided with a through hole, and the top end and the bottom end of the elastic body face the through hole and are concavely provided with a concentration groove;

The connecting structure comprises a first connecting part and a second connecting part, and the two contact parts are respectively connected to two opposite side walls of the first connecting part and the second connecting part; and

The bellows is sleeved on the elastic body and is tightly connected to two opposite side walls of the first connecting part and the second connecting part, and the inner wall of the bellows and the outer wall of the elastic body jointly form a protection space.

In one embodiment of the present application, the through hole includes two strain holes and a separation groove:

The two strain holes are arranged oppositely, are round and are used for concentrating stress at the top end and the bottom end of the strain holes; and

The separation groove is square, and the side edge of the separation groove is connected with the two strain holes and used for separating the two strain holes and keeping the two strain holes in linkage.

In an embodiment of the present application, a resistance strain gauge is adhered to a position of the concentration groove near the vertex of the strain hole, so as to sense the magnitude of the tensile pressure applied to the elastomer.

In an embodiment of the present application, a layer of silica gel is filled and covered in the centralized groove, and the centralized groove is used for sealing and protecting the resistance strain gauge.

In an embodiment of the application, the first connection portion includes two fixing holes and a wire holder:

The two fixing holes penetrate through the top end of the first connecting part and are used for conveniently fixing the sensor at a certain position; and

The wire holder penetrates through the side wall of the first connecting portion and is used for wiring and transmitting out electric signals converted from stress on the elastic body.

In an embodiment of the application, an installation groove is formed in the top end of the second connecting portion in a penetrating manner, and the installation groove is used for fixing the to-be-detected piece, so that the weight of the to-be-detected piece can be conveniently tested.

According to the technical scheme, through the fact that the through holes are formed in the end face of the elastic body to achieve the effect of concentrated strain force, the concentrated grooves are concavely formed in the top end of the elastic body to enable the top ends of the resistance strain gauges and the strain holes of the through holes to be closer, the sensitivity of a product can be improved, the effect of further improving accuracy is achieved, silica gel is filled in the concentrated grooves and can be used for sealing and protecting the resistance strain gauges, and because the silica gel is made of flexible materials, force transmission on the elastic body of stainless steel cannot be affected, the through holes comprise two strain holes, the strain holes are connected through the separation grooves, the two strain holes can be separated, data cannot interfere with each other, but the relevance of the two strain holes can be guaranteed, the resistance strain gauges attached to different positions can keep sensitivity consistent, output is insensitive to change of loading points, and the accuracy and stability of the product can be effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a bellows-type tension pressure sensor according to an embodiment of the present utility model;

FIG. 2 is a front view of one embodiment of a bellows-type pull pressure sensor of the present utility model;

FIG. 3 is a schematic view of a bellows-type tension pressure sensor according to an embodiment of the present utility model with the bellows removed;

FIG. 4 is a front view of an embodiment of a bellows-type tension pressure sensor of the present utility model with the bellows removed.

Reference numerals illustrate:

1. An elastomer; 11. a contact portion; 12. a through hole; 121. a strain hole; 122. a separation groove; 13. a concentration tank; 14. resistance strain gauge; 15. silica gel; 2. a connection structure; 21. a first connection portion; 211. a fixing hole; 212. a wire holder; 22. a second connecting portion; 221. a mounting hole; 3. a bellows; 4. and protecting the space.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 4, in an embodiment of the present utility model, a bellows 3 type tension and pressure sensor is provided, which includes an elastic body 1, a connection structure 2 and a bellows 3, wherein both ends of the elastic body 1 are provided with contact portions 11, the end surface of the elastic body 1 is provided with a through hole 12, and the top end and the bottom end of the elastic body 1 face the through hole 12 and are concavely provided with a concentration groove 13; the connecting structure 2 comprises a first connecting part 21 and a second connecting part 22, and two contact parts 11 are respectively connected to two opposite side walls of the first connecting part 21 and the second connecting part 22; the bellows 3 is sleeved on the elastic body 1 and is tightly connected to two opposite side walls of the first connecting portion 21 and the second connecting portion 22, and the inner wall of the bellows 3 and the outer wall of the elastic body 1 jointly form a protection space 4.

In the bellows 3-type tension-pressure sensor of the application, the two ends of the elastic body 1 are provided with the contact parts 11, the width of the contact parts 11 gradually increases along the extending direction away from the elastic body 1 to form a slope with radian, the contact area of the elastic body 1 and the connecting structure 2 can be increased, the pressure born by the second connecting part 22 can be better perceived by the elastic body 1, the end face of the elastic body 1 is provided with the through hole 12, the through hole 12 is formed by two strain holes 121 and the separation groove 122 connecting the two strain holes 121, the two strain holes 121 are round, the top end and the bottom end of the strain holes 121 can more easily perceive the change of the tension pressure, four resistance strain sheets 14 can be attached at the positions in total to efficiently collect the tension pressure signals born by the elastic body 1, the sensitivity of the test is better, the precision is higher, the separation groove 122 can separate the two strain holes 121 to a certain extent, the two strain holes are not mutually interfered, and meanwhile, the sensor has a certain linkage property, so that the sensitivity consistency of the sensor is better, the stability of the sensor is improved, the top end of the elastic body 1 is provided with the concentration groove 13 for further enabling the resistance strain gauge 14 to be close to the top end or the bottom end of the strain hole 121, the concentration groove 13 is filled with the silica gel 15 for protecting the resistance strain gauge 14 in a sealing manner, the silica gel 15 is made of a flexible material, the elastic body 1 is made of a stainless steel material, the silica gel 15 cannot influence the force on the elastic body 1, and the service life of the product is prolonged well.

Further, the connection structure 2 is composed of a first connection portion 21 and a second connection portion 22, the contact portion 11 of the elastic body 1 is respectively connected with the side surfaces opposite to the first connection portion 21 and the second connection portion 22, two fixing holes 211 are formed in the upper end of the first connection portion 21, so that the sensor can be fixed at a certain position for convenient use, a wire holder 212 is formed in the side surface of the first connection portion 21, the wire holder 212 can penetrate into the protection space 4, the wire is connected with the resistance strain gauge 14, and electric signals converted from pressure signals collected by the resistance strain gauge 14 are conveniently transmitted to be convenient to view; the top end of the second wire holder 212 is provided with a mounting hole 221 therethrough, so as to fix the object to be tested and test the object.

Further, the bellows 3 is sleeved on the elastic body 1, two ends of the bellows 3 are connected to the first connecting portion 21 and the second connecting portion 22, the bellows and the second connecting portion are tightly connected, a sealed protection space 4 can be formed between the inner wall of the bellows 3 and the elastic body 1, overload resistance of the bellows 3 is high, welding sealing and vacuumizing and nitrogen filling can be achieved, a sensor can be protected efficiently, stability is improved, and meanwhile, service life is prolonged.

Referring to fig. 3 to 4 in combination, in an embodiment of the present application, the through hole 12 includes two strain holes 121 and a separation groove 122, the two strain holes 121 are disposed opposite to each other, the strain holes 121 are circular, and are used for concentrating stress at the top and bottom ends of the strain holes 121; the dividing groove 122 has a square shape, and side edges of the dividing groove 122 are connected to the two strain holes 121 for separating the two strain holes 121 and maintaining the connectivity.

In the bellows 3-type tension pressure sensor provided by the application, the end face of the elastic body 1 is provided with the through hole 12, the through hole 12 is formed by the two strain holes 121 and the separation groove 122 for connecting the two strain holes 121, the two strain holes 121 are circular, the top end and the bottom end of the strain holes 121 can be more easily perceived as the change of the tension pressure, four pieces of resistance strain sheets 14 are attached to the positions in total, the tension pressure signals received by the elastic body 1 can be efficiently collected, the sensitivity of the test is better, the precision is higher, the separation groove 122 can separate the two strain holes 121 to a certain extent, the two strain holes cannot interfere with each other, and meanwhile, the sensitivity consistency of the sensor is better, and the stability of the sensor is improved.

Referring to fig. 4 in combination, in an embodiment of the present application, a resistive strain gauge 14 is attached to the concentration groove 13 near the top of the strain hole 121, so as to sense the magnitude of the tensile pressure applied to the elastic body 1.

In the bellows 3-type tension-pressure sensor provided by the application, the strain hole 121 is circular, so that the change of tension-pressure can be sensed more easily at the top end and the bottom end of the strain hole 121, and four pieces of resistance strain gauges 14 are attached to the positions, so that tension-pressure signals received by the elastic body 1 can be efficiently collected, the sensitivity of the test is better, the precision is higher, and the pressure signals received by the elastic body 1 can be better received, converted into electric signals and output.

Referring to fig. 3 in combination, in an embodiment of the present application, the concentration tank 13 is filled with a layer of silica gel 15 for sealing the protective resistance strain gauge 14.

In the bellows 3 type tension and pressure sensor, in order to protect the resistance strain gauge 14, the concentration groove 13 is filled with the silica gel 15 for sealing and protecting the resistance strain gauge 14, the silica gel 15 is made of a flexible material, the elastic body 1 is made of a stainless steel material, and the silica gel 15 cannot influence the force on the elastic body 1, so that the service life of a product can be prolonged well.

Referring to fig. 1 to 2 in combination, in an embodiment of the application, the first connecting portion 21 includes two fixing holes 211 and a wire holder 212, and the two fixing holes 211 are disposed through the top end of the first connecting portion 21, so as to facilitate fixing the sensor somewhere; the wire holder 212 penetrates through a sidewall of the first connecting portion 21, and is used for connecting wires and transmitting out an electrical signal converted from stress on the elastic body 1.

In the bellows 3 type tension pressure sensor, a connecting structure 2 is composed of a first connecting part 21 and a second connecting part 22, a contact part 11 of an elastic body 1 is respectively connected with the side surfaces opposite to the first connecting part 21 and the second connecting part 22, two fixing holes 211 are formed in the upper end of the first connecting part 21, the sensor can be fixed at a certain position for convenient use, a wire holder 212 is formed in the side surface of the first connecting part 21, the wire holder 212 can penetrate into a protection space 4, and a resistor strain gauge 14 is connected in a wire connection mode, so that electric signals converted by pressure signals collected by the resistor strain gauge 14 are conveniently transmitted and conveniently checked; the top end of the second wire holder 212 is provided with a mounting hole 221 therethrough, so as to fix the object to be tested and test the object.

Referring to fig. 2 in combination, in an embodiment of the present application, a mounting groove is formed through the top end of the second connecting portion 22, so as to fix the to-be-detected member, and facilitate testing of the weight of the to-be-detected member.

In the bellows 3-type tension pressure sensor of the present application, the mounting hole 221 provided at the top end of the second wire holder 212 is used to fix the member to be detected, so that the pressure sensor and the tension sensor can be tested well, and the overall usability is improved.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A bellows-type tension pressure sensor, comprising:

the elastic body is provided with contact parts at two ends, the end face of the elastic body is provided with a through hole, and the top end and the bottom end of the elastic body face the through hole in a concave manner and are provided with a concentration groove;

The corrugated pipe is sleeved on the elastic body and is tightly connected to two opposite side walls of the first connecting part and the second connecting part, and the inner wall of the corrugated pipe and the outer wall of the elastic body jointly form a protection space.

2. A bellows-type tension pressure sensor as recited in claim 1, wherein said through hole comprises:

the strain holes are arranged oppositely and are round and used for concentrating strain force at the top end and the bottom end of the strain holes; and

And the side edges of the separation groove are connected with the two strain holes and are used for separating the two strain holes and keeping the linkage.

3. The bellows-type tension-pressure sensor of claim 2, wherein a resistance strain gauge is attached to the concentration groove near the top of the strain hole for sensing the tension-pressure applied to the elastic body.

4. A bellows-type tension-pressure sensor as recited in claim 3, wherein said concentrating groove is filled with a layer of silica gel for sealing and protecting said resistive strain gauge.

5. A bellows-type tension pressure sensor as recited in any one of claims 1-4, wherein said first connection portion comprises:

6. The bellows-type tension and pressure sensor according to claim 5, wherein the top end of the second connecting portion is provided with a mounting groove in a penetrating manner for fixing the member to be detected, so that the weight of the member to be detected can be conveniently tested.