CN113513519B

CN113513519B - Strain gauge pasting device

Info

Publication number: CN113513519B
Application number: CN202110531344.5A
Authority: CN
Inventors: 戴洪飞; 张雷; 郑峰
Original assignee: Nanjing He Pu Technology Co ltd
Current assignee: Nanjing He Pu Technology Co ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2022-09-09
Anticipated expiration: 2041-05-17
Also published as: CN113513519A

Abstract

The invention discloses a strain gauge pasting device which comprises an adjusting assembly, a fixing assembly and a pressing assembly, wherein the adjusting assembly comprises an adjusting cylinder, a rotating part arranged in the adjusting cylinder, and a pressing column connected with the rotating part; the sticking assembly comprises a connecting end cover connected with one end of the pressing column and a rubber sheet connected with the connecting end cover; compared with manual pressing, the device improves the bonding efficiency of the strain gauge; the pressing load can be accurately measured through the force measuring device, and the pressing effect is ensured; the structure is simple and convenient, and the surface occupancy rate is low; the pressing results are uniform, and the validity of the measured data is high.

Description

Strain gauge pasting device

Technical Field

The invention relates to the field of strain gauge pasting, in particular to a strain gauge pasting device.

Background

In some mechanical equipment structural strength tests, in order to master stress distribution of a structural part under a loaded condition, strain gauges are required to be adhered to key parts of all parts of the mechanical equipment to monitor the stress distribution and a force transmission path. At present, a strain gauge is adhered to the surface of a tested part through an adhesive, a pasting worker is required to press the strain gauge for a period of time by fingers before the adhesive is solidified to ensure the adhering quality, and particularly when the strain gauge is adhered to the surface of some special parts (such as a cabin cover glass transparent part of an airplane), the adhesive is pressed and fixed for more than 1 hour after the strain gauge is adhered according to the adhering process requirement of the strain gauge due to the fact that the solidifying time of the used special adhesive is long, so that the adhering efficiency is low, manual pressing and fixing effects are not ideal, the pressing effect is not uniform, the drop of the strain gauge in a test can be caused, or the measurement result of data can be influenced.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and some simplifications or omissions may be made in this section as well as in the abstract and title of the application to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above problems and/or problems occurring in the prior art.

Therefore, the technical problem to be solved by the invention is that the strain foil pasting process requires a pasting worker to press and fix the strain foil for more than 1 hour after pasting, so that the pasting efficiency is low, the manual pressing and fixing effects are not ideal, and the pressing effects are not uniform.

In order to solve the technical problems, the invention provides the following technical scheme: a strain gauge pasting device comprises an adjusting assembly, a pressing assembly and a fixing assembly, wherein the adjusting assembly comprises an adjusting cylinder, a rotating part arranged in the adjusting cylinder, and a pressing column connected with the rotating part; the pasting component comprises a connecting end cover connected with one end of the pressing column and a rubber sheet connected with the connecting end cover.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: the pressing column comprises a pressing end and a moving end, the pressing end is fixedly connected with the connecting end cover, the moving end is provided with a first external thread, the rotating piece is provided with a containing hole, a first internal thread is arranged in the containing hole, the moving end is located in the containing hole, and the first external thread is connected with the first internal thread in a matched mode.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: the part of the rotating piece, which is positioned outside the adjusting cylinder, is provided with a rotating end, the part of the rotating piece, which is positioned inside the adjusting cylinder, is provided with an annular groove along the circumference, the adjusting cylinder is provided with a limiting hole, a limiting pin is arranged in the limiting hole, one end of the limiting pin is embedded into the annular groove, and a spring is arranged between the rotating end and the moving end.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: an end cover is arranged at one end, far away from the rotating end, of the adjusting cylinder, and the pressing column penetrates through the end cover; the pressing end is provided with an axial limiting groove, the end cover is provided with a limiting hole with the same size as the cross section of the pressing end, and the pressing end penetrates through the limiting hole.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: one end, close to the inside of the end cover, of the rotating piece is connected with a first end face ratchet wheel, a second end face ratchet wheel is arranged in the adjusting cylinder, and the second end face ratchet wheel is located between the first end face ratchet wheel and the end cover;

the second end surface ratchet wheel is meshed with the first end surface ratchet wheel.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: and a first elastic piece is arranged between the second end face ratchet wheel and the end cover.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: the second end face ratchet wheel is provided with a guide pin along the radial direction, the adjusting cylinder is provided with a guide groove extending along the axial direction, the guide pin extends into the guide groove, and the guide pin is tangent to the side face of the guide groove.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: the regulation barrel surface is provided with the second external screw thread, it is equipped with the adjustable ring to adjust a barrel overcoat, the adjustable ring be provided with the internal thread and with the second external screw thread cooperation is connected, the part that the uide pin stretches out the guide way with the terminal surface of adjustable ring contacts.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: the side surface of the guide groove comprises an insulating area A far away from the end cover and a conductive area B close to the end cover, the conductive area B is provided with a conductive sheet, the guide pin is provided with a conductive hole with an axis vertical to the side surface of the guide groove along the radial direction, both ends of the conductive hole are provided with conductive blocks, the conductive blocks are contacted with the side surface of the guide groove, the guide pin is also provided with a mounting hole penetrating through the conductive hole, an LED lamp is mounted in the mounting hole, and positive and negative contacts of the LED lamp are respectively connected with the two conductive blocks; the two conducting strips are connected with a power supply through a wire.

As a preferable aspect of the strain gauge attaching apparatus of the present invention, wherein: the one end that the regulation section of thick bamboo was provided with the subassembly of pasting is connected with annular sucking disc.

The invention has the beneficial effects that: compared with manual pressing, the device improves the bonding efficiency of the strain gauge; the pressing load can be accurately measured through the force measuring device, and the pressing effect is ensured; the structure is simple and convenient, and the surface occupancy rate is low; the pressing results are uniform, and the validity of the measured data is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic cross-sectional structure view of a strain gauge attaching apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a strain gauge attaching apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of engagement of two ratchets in the strain gauge attaching apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the separation of two ratchets in the strain gage pasting device according to an embodiment of the invention;

fig. 5 is a schematic structural diagram of an LED lamp reminding principle in the device for pasting a strain gauge according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a strain gauge pasting device, including an adjusting assembly 100 and a pasting assembly 200, where the adjusting assembly 100 is used for adjusting the pasting assembly 200, and includes an adjusting cylinder 101, a rotating member 102 disposed in the adjusting cylinder 101, and a pressing column 103 connected to the rotating member 102; the adjusting cylinder 101 is a cylinder with a hollow inner part, the rotating part 102 can rotate in the adjusting cylinder 101, one end of the pressing column 103 is connected with the rotating part 102, and the other end of the pressing column extends out of the adjusting cylinder 101 to be used for adhering a strain gauge; the pasting component 200 comprises a connecting end cover 201 connected with one end of the pressing column 103 and a rubber sheet 202 connected with the connecting end cover 201; the rubber sheet 202 is connected to the strain gauge and attached.

Further, the pressing column 103 includes a pressing end 103b and a moving end 103a, wherein the pressing end 103b is fixedly connected with the connecting end cap 201, the moving end 103a is provided with a first external thread 103c, the rotating member 102 is provided with a receiving hole 102a, a first internal thread 102b is provided in the receiving hole 102a, the moving end 103a is located in the receiving hole 102a, and the first external thread 103c is connected with the first internal thread 102b in a matching manner. Therefore, the pressing column 103 and the rotating member 102 can rotate with each other, wherein the portion of the rotating member 102 located outside the adjusting cylinder 101 is provided with a rotating end 102c, the rotating end 102c is the operating portion, the portion of the rotating member 102 located inside the adjusting cylinder 101 is provided with an annular groove 102d along the circumference, the adjusting cylinder 101 is provided with a limiting hole 101a, a limiting pin 104 is arranged inside the limiting hole 101a, and one end of the limiting pin 104 is embedded into the annular groove 102 d. Since the stopper pin 104 can restrict the axial displacement of the rotor 102, the rotor 102 can only rotate, and the pressing column 103 moves in the axial direction when the rotating end 102c is rotated.

Preferably, a spring 203 is disposed between the rotating end 102c and the moving end 103a, and the elastic force of the spring 203 can push the moving end 103a to prevent the pressing column 103 from moving toward the rotating end 102c and causing the strain gauge to be pressed insecurely.

Further, an end of the adjusting cylinder 101 away from the rotating end 102c is provided with an end cap 101b, and the pressing column 103 penetrates through the end cap 101 b. The pressing end 103b is provided with a limit groove 103d along the axial direction, the end cover 101b is provided with a limit hole 101e which is consistent with the cross section of the pressing end 103b in size, and the pressing end 103b penetrates through the limit hole 101 e. Therefore, the limiting hole 101e limits the circumferential movement of the pressing end 103b, so that the pressing end 103b can only move along the axial direction, and the pressing end 103b and the rotating member 102 form a screw rod structure.

Preferably, one end of the rotating member 102 close to the end cap 101b is connected with a first end surface ratchet 105, a second end surface ratchet 106 is arranged in the adjusting cylinder 101, and the second end surface ratchet 106 is located between the first end surface ratchet 105 and the end cap 101 b; the second end ratchet 106 is engaged with the first end ratchet 105. A first elastic piece 107 is arranged between the second end ratchet 106 and the end cover 101 b. The first elastic element 107 is a spring, when the second end ratchet 106 is engaged with the first end ratchet 105, the rotating member 102 can only rotate in one direction, that is, the direction of pressing the strain gauge, because of the mechanical principle of the ratchet, the rotating member 102 cannot rotate reversely at this time, so as to prevent the phenomenon of loosening when pressing and adhering the strain gauge, when the pressing is finished and needs to be loosened, the second end ratchet 106 is pressed in the direction away from the first end ratchet 105, so that the two are separated, and at this time, the rotating member 102 can rotate in the opposite direction.

Further, the second end ratchet 106 is provided with a guide pin 106a along the radial direction, the adjusting cylinder 101 is provided with a guide groove 101c extending along the axial direction, the guide pin 106a extends into the guide groove 101c, and the guide pin 106a is tangent to the side surface of the guide groove 101 c. The guide pin 106a can limit the rotational freedom of the second end face ratchet 106 and provide an axial direction guiding function for the second end face ratchet 106; the surface of the adjusting cylinder 101 is provided with a second external thread 101d, the adjusting cylinder 101 is externally sleeved with an adjusting ring 108, the adjusting ring 108 is provided with a second internal thread 108a and is in fit connection with the second external thread 101d, and the part of the guide pin 106a extending out of the guide groove 101c is in contact with the end surface of the adjusting ring 108. Therefore, when the second end ratchet 106 needs to be far away from the first end ratchet 105, the adjusting ring 108 is operated to push the second end ratchet 106 far away from the first end ratchet 105.

Preferably, the adjusting cylinder 101 is connected with a ring-shaped suction cup 300 at one end thereof provided with the pasting assembly 200. The ring chuck 300 is prior art and can be attached to the structure to which the strain gage is to be attached.

The implementation mode and principle of the embodiment are as follows: when a strain gauge needs to be adhered to a certain structure, the strain gauge is firstly adhered to the rubber sheet 202, the annular sucking disc 300 is adsorbed to the structure to be adhered with the strain gauge, then the pressing column 103 is moved towards the direction far away from the rotating end 102c by operating the rotating piece 102, namely the direction for pressing the strain gauge, after the strain gauge is pressed and adhered in place, the rotating piece 102 is fixed at the position under the action of the ratchet wheel, and the phenomenon of looseness cannot occur. After the pressing is finished, the second end ratchet 106 is far away from the first end ratchet 105 by operating the adjusting ring 108, the rotating direction of the rotating member 102 is not limited any more, and at this time, the rotating member 102 can be operated to make the pressing column 103 separate from the strain gauge, and the strain gauge is adhered and fixed.

Example 2

Referring to fig. 1 to 5, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: in the previous embodiment, the operation of the second end ratchet 106 away from the first end ratchet 105 requires the operator to clearly see that the second end ratchet 106 has moved away from the first end ratchet 105, and therefore, in this embodiment, the following are also included:

the side of guide way 101c includes insulating zone a and the conducting region B that is close to end cover 101B far away from end cover 101B, and insulating zone a is for the region that can not electrically conduct, and conducting region B is provided with conducting strip 109, and two sides of guide way 101c all are provided with conducting strip 109 promptly, and two conducting strips 109 pass through the wire and are connected with the power, and the connection of two conducting strips 109 and power is prior art, and no longer repeated, and wherein two conducting strips 109 are not direct contact.

Further, the guide pin 106a is provided with a conductive hole 106b along the radial direction, the axis of the conductive hole 106b is perpendicular to the side surface of the guide groove 101c, both ends of the conductive hole 106b are provided with conductive blocks 106c, both the conductive blocks 106c are conductors, the two conductive blocks 106c are not directly contacted, the conductive blocks 106c are contacted with the side surface of the guide groove 101c, when the guide pin 106a is located at different positions in the guide groove 101c, the contact areas are different, namely when the second end surface ratchet 106 is meshed with the first end surface ratchet 105, the conductive blocks 106c are contacted with the insulating area a, and when the second end surface ratchet 106 is completely disengaged from the first end surface ratchet 105, the conductive blocks 106c are just contacted with the conductive sheets 109.

Further, the guide pin 106a is further provided with a mounting hole 106e penetrating the conductive hole 106b, an LED lamp 106d is mounted in the mounting hole 106e, and positive and negative contacts of the LED lamp 106d are connected with the two conductive blocks 106c respectively; therefore, when the conductive block 106c is just contacted with the conductive sheet 109, the contact of the LED lamp 106d, the conductive block 106c, the conductive sheet 109 and the power supply form a path, and the LED lamp 106d emits light to indicate to the operator that the second end ratchet 106 is completely disengaged from the first end ratchet 105, so that the rotating member 102 can be operated.

It should be noted that, in the implementation of the present embodiment, the operation should be performed after the strain gauge has been adhered and fixed, so that the operator can intuitively understand the state of the device.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a device is pasted to foil gage which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the adjusting assembly (100) comprises an adjusting cylinder (101), a rotating piece (102) arranged in the adjusting cylinder (101), and a pressing column (103) connected with the rotating piece (102);

the sticking assembly (200) comprises a connecting end cover (201) connected with one end of the pressing column (103) and a rubber sheet (202) connected with the connecting end cover (201);

the pressing column (103) comprises a pressing end (103 b) and a moving end (103 a), the pressing end (103 b) is fixedly connected with the connecting end cover (201), the moving end (103 a) is provided with a first external thread (103 c), the rotating part (102) is provided with a containing hole (102 a), a first internal thread (102 b) is arranged in the containing hole (102 a), the moving end (103 a) is located in the containing hole (102 a), and the first external thread (103 c) is connected with the first internal thread (102 b) in a matched mode;

a rotating end (102 c) is arranged at the part of the rotating part (102) which is positioned outside the adjusting cylinder (101), an annular groove (102 d) is arranged at the part of the rotating part (102) which is positioned inside the adjusting cylinder (101) along the circumference, a limiting hole (101 a) is arranged on the adjusting cylinder (101), a limiting pin (104) is arranged in the limiting hole (101 a), and one end of the limiting pin (104) is embedded into the annular groove (102 d);

a spring (203) is arranged between the rotating end (102 c) and the moving end (103 a);

an end cover (101 b) is arranged at one end, away from the rotating end (102 c), of the adjusting cylinder (101), the pressing column (103) penetrates through the end cover (101 b), a limiting groove (103 d) along the axial direction is formed in the pressing end (103 b), a limiting hole (101 e) which is consistent with the cross section of the pressing end (103 b) in size is formed in the end cover (101 b), and the pressing end (103 b) penetrates through the limiting hole (101 e);

one end, close to the end cover (101 b), of the rotating piece (102) is connected with a first end face ratchet wheel (105), a second end face ratchet wheel (106) is arranged in the adjusting cylinder (101), and the second end face ratchet wheel (106) is located between the first end face ratchet wheel (105) and the end cover (101 b);

the second end face ratchet (106) is engaged with the first end face ratchet (105);

a first elastic piece (107) is arranged between the second end face ratchet (106) and the end cover (101 b);

the second end face ratchet wheel (106) is provided with a guide pin (106 a) along the radial direction, the adjusting cylinder (101) is provided with a guide groove (101 c) extending along the axial direction, the guide pin (106 a) extends into the guide groove (101 c), and the guide pin (106 a) is tangent to the side face of the guide groove (101 c);

the surface of the adjusting cylinder (101) is provided with a second external thread (101 d), an adjusting ring (108) is sleeved outside the adjusting cylinder (101), the adjusting ring (108) is provided with a second internal thread (108 a) and is matched and connected with the second external thread (101 d), and the part of the guide pin (106 a) extending out of the guide groove (101 c) is in contact with the end surface of the adjusting ring (108);

the side surface of the guide groove (101 c) comprises an insulation area (A) far away from the end cover (101B) and a conductive area (B) close to the end cover (101B), the conductive area (B) is provided with a conductive sheet (109), the guide pin (106 a) is radially provided with a conductive hole (106B) with the axis perpendicular to the side surface of the guide groove (101 c), two ends of the conductive hole (106B) are respectively provided with a conductive block (106 c), the conductive block (106 c) is contacted with the side surface of the guide groove (101 c), the guide pin (106 a) is further provided with a mounting hole (106 e) penetrating through the conductive hole (106B), an LED lamp (106 d) is mounted in the mounting hole (106 e), and positive and negative contacts of the LED lamp (106 d) are respectively connected with the two conductive blocks (106 c); the two conducting strips (109) are connected with a power supply through leads.

2. The strain gage affixing apparatus according to claim 1, wherein: one end of the adjusting cylinder (101) provided with the pasting component (200) is connected with an annular sucking disc (300).