CN214622118U - Tearing impact load sensor - Google Patents
Tearing impact load sensor Download PDFInfo
- Publication number
- CN214622118U CN214622118U CN202120738466.7U CN202120738466U CN214622118U CN 214622118 U CN214622118 U CN 214622118U CN 202120738466 U CN202120738466 U CN 202120738466U CN 214622118 U CN214622118 U CN 214622118U
- Authority
- CN
- China
- Prior art keywords
- impact
- strain
- connecting portion
- impact load
- stress concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a tear impact load sensor, it has: an impact portion having an impact contact surface and a first connection portion; a base having a mounting portion and a second connecting portion; the strain testing part is arranged between the impact part and the base, the third connecting part and the fourth connecting part are respectively connected with the first connecting part and the second connecting part, the impact part, the strain testing part and the base are connected into a whole, and a strain testing area for installing a strain gauge and a plurality of stress concentration areas are arranged at a preset position of the strain testing part. Through the structural design of three parts, the rigidity and the response frequency of the whole structure are increased, the high-frequency-response tearing impact test can be applicable, and by arranging the stress concentration groove, the load is conducted to the strain test area when the sensor is used for impact load test, the strain area receives the load completely and is distributed uniformly, so that the accuracy and the repeatability of the strain test are greatly improved.
Description
Technical Field
The utility model belongs to the technical field of load sensor, especially, relate to a dynamic load sensor, be particularly useful for the dynamic load measurement that the impact was torn to the metal.
Background
At present, the traditional dynamic load measurement structure mainly comprises a column type structure and a ring type structure, and the load change of the elastomer loading process is reflected by sticking a strain gauge on a structural elastomer, so that the impact load is measured.
Due to the structural limitation of the existing sensor, the sensor is used as an intermediate structure during actual measurement, and a high-hardness elastic device is required to be installed at the front end of the sensor so as to tear and impact a measured sample and avoid damaging the sensor structure.
However, this not only makes the structure complicated, but also reduces the rigidity of the whole test structure, lowers the response frequency of the test load structure, and cannot be applied to a tear impact test with high frequency response.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims to provide a tear impact load sensor, its response frequency is high, can be applicable to the tear impact test of high frequency response.
In order to achieve the above object, the present invention provides a main technical solution comprising:
a tear impact load sensor, having:
an impact portion having an impact contact surface and a first connection portion;
a base having a mounting portion and a second connecting portion;
the strain testing part is arranged between the impact part and the base, the third connecting part and the fourth connecting part are respectively connected with the first connecting part and the second connecting part, the impact part, the strain testing part and the base are connected into a whole, and a strain testing area for installing a strain gauge and a plurality of stress concentration areas are arranged at a preset position of the strain testing part.
With the help of the above technical scheme, the utility model discloses a tear impact load sensor through three integrative structural design, has increased overall structure's rigidity and response frequency, can be applicable to the tear impact test of high frequency response.
In a preferred embodiment of the present invention, the first connecting portion and the third connecting portion constitute a pair of mortise and tenon structures. By means of the arrangement of the tenon-and-mortise structure, the load transmission loss can be reduced, the effective transmission of the load is ensured, the stability of the structure can be improved, and the load can be effectively transmitted after being impacted for many times. Preferably, the first connecting portion is a tenon, and the third connecting portion is a mortise. Through will assault load by mortise slot to the tenon transmission, both can reduce load and go out the transmission loss, guarantee the effective transmission of load, can improve the life of structure again.
In a preferred embodiment of the present invention, the second connecting portion and the fourth connecting portion constitute a pair of mortise and tenon structures. Preferably, the second connecting part is a mortise and tenon, and the fourth connecting part is a tenon.
In one embodiment of the present invention, the surface layer of the impact contact surface of the impact portion has a through-hardened layer of a predetermined thickness. Through setting up the quenching layer, the hardness and the intensity of the impact contact surface that directly produce tearing impact with the sample have been showing to have increased, guarantee that the sensor does not produce indentation, defect or fracture when tearing impact.
Preferably, the through-hardened layer is formed by high-frequency quenching.
Preferably, the depth of the through-hardened layer is 2mm to 3 mm.
Preferably, the hardness of the quench layer is greater than HRC 60.
Preferably, the impact portion is made of C12 MoV.
Preferably, the impact contact surface of the impact portion is arcuate.
In one embodiment of the present invention, the strain measurement area is provided with a slot, and the strain gauge is installed in the slot.
Preferably, the number of the slotted holes is two.
Preferably, the two slots are symmetrically disposed in the strain testing region.
In one embodiment of the present invention, the whole strain test portion is in a rectangular parallelepiped shape.
Preferably, the two slotted holes are respectively arranged on the left side surface and the right side surface of the cuboid.
Preferably, the depth of the slot is less than half of the distance between the left side and the right side.
Preferably, the depth of the slot hole is not more than one third of the distance between the left side surface and the right side surface.
Preferably, the slot is cylindrical.
Preferably, the diameter of the cylindrical slot is between two and five times the depth.
In one embodiment of the present invention, the stress concentration zone comprises a stress concentration groove.
Preferably, the stress concentration grooves are symmetrically arranged.
Preferably, the number of the stress concentration grooves is four.
Preferably, the stress concentration grooves are formed in the front side surface and the rear side surface.
Preferably, the front side surface and the rear side surface are respectively provided with two stress concentration grooves.
Preferably, the stress concentration grooves formed in the front side surface and the rear side surface are through grooves penetrating the left and right side surfaces.
Preferably, the depth of the stress concentration groove is between one half and two times of the depth of the slot hole.
Preferably, the width of the stress concentration groove is between one sixth and one quarter of the depth of the stress concentration groove.
Preferably, the bottom of the stress concentration groove is provided with a chamfer.
Preferably rounded. Preferably, the radius of the fillet is 1/2 ± 1/3 of the width of the stress concentrating groove.
In any of the above embodiments, the strain test region does not intersect the stress concentration region. Therefore, when the impact load test is carried out, the load can be effectively transmitted to the strain test area, so that the strain test area can completely receive the impact load, the uniform distribution of the impact load can be ensured, and the accuracy and the repeatability of the strain test can be greatly improved.
Preferably, the extension line of the strain test zone does not intersect the extension line of the stress concentration zone.
Preferably, the extension of the boundary of the strain test zone does not intersect the extension of the boundary of the stress concentration zone.
In one embodiment of the present invention, the third connecting portion and the fourth connecting portion are respectively disposed on the top surface and the bottom surface of the strain gauge.
Preferably, the third connecting portion includes a groove formed in the top surface.
Preferably, the groove extends in the direction of connection of the front side and the rear side.
Preferably, the groove of the third connecting part is a through groove.
Preferably, the through groove penetrates the front side surface and the rear side surface.
Preferably, the fourth connecting portion includes a flange provided on the bottom surface.
Preferably, the flange extends in the direction of connection of the front and rear sides.
Preferably, the flange of the fourth connecting portion connects the front side and the rear side.
Preferably, the third connecting portion further comprises a threaded connection structure arranged on the top surface, and the impact portion is provided with a connection structure corresponding to the threaded connection structure of the third connecting portion.
Preferably, the threaded connection structure of the third connection portion is a threaded hole formed in the top surface.
Preferably, the connection structure of the impact part is a through hole, and the bolt passes through the through hole and is in threaded connection with the threaded hole of the third connection part to connect the impact part and the strain testing part into a whole.
Preferably, the threaded hole of the third connecting portion is opened at the bottom of the groove of the third connecting portion.
Preferably, the threaded hole of the third connecting portion is not intersected with the strain testing area and the stress concentration area.
Preferably, the extension line of the threaded hole of the third connecting part does not intersect with the extension line of the strain test area and the extension line of the stress concentration area.
Preferably, the boundary extension line of the threaded hole of the third connecting part does not intersect with the boundary extension line of the strain test area and the boundary extension line of the stress concentration area.
In an embodiment of the present invention, the plane where the fourth connecting portion is located is larger than the plane where the third connecting portion is located. Preferably, a step is formed between the two.
In an embodiment of the present invention, the plane where the third connecting portion is located is larger than the plane where the first connecting portion is located.
In an embodiment of the present invention, the plane where the second connecting portion is located is larger than the plane where the fourth connecting portion is located.
The utility model discloses an in the embodiment, the installation department of base includes fourth of the twelve earthly branches groove and threaded connection structure.
The utility model has the advantages that:
the tearing impact load sensor of the utility model increases the rigidity and response frequency of the whole structure through the integrated structure design, and can be suitable for the tearing impact test with high frequency response; moreover, the hardness and the strength of an impact contact surface which directly generates tearing impact with a test sample are obviously improved by arranging the quenching layer, so that the sensor is ensured not to generate indentation, defects or fracture during tearing impact; the strain test area is provided with the slotted hole, particularly the circular slotted hole, and the strain gauge is adhered in the slotted hole, so that the stress at the strain test position is uniform, the stress gradient is small, and the test is accurate; by arranging the stress concentration groove, when the sensor is used for impact load testing, the load is transmitted to the strain testing area, and the strain area completely receives the load and is uniformly distributed, so that the accuracy and the repeatability of the strain testing are greatly improved; the lower part of the base of the sensor is used as a position connected with equipment, the contact mode is plane contact, and the sensor is fixed through the bolt, so that the sensor is pressed to tear impact load during testing, the bolt is installed at the lower part, the test load is not shunted, the middle sensitive test area can bear complete load, and the measurement accuracy is improved.
Drawings
Fig. 1 is a schematic perspective view of a tearing impact load sensor according to an embodiment of the present invention;
fig. 2 is an exploded view of a tearing impact load sensor according to an embodiment of the present invention;
fig. 3 is an exploded view of a tearing impact load sensor according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a strain gauge in a tearing impact load sensor according to an embodiment of the present invention.
[ description of main element symbols ]
The impact testing device comprises an impact part 1, an impact contact surface 11, a first connecting part 12, a strain testing part 2, a third connecting part 21, a fourth connecting part 22, a strain testing area 23, a stress concentration groove 24, a groove hole 25, a base 3, a mounting part 31 and a second connecting part 32.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention as illustrated in the accompanying drawings.
Referring to fig. 1 to 4, a tearing impact load sensor according to an embodiment of the present invention includes:
an impact portion 1 having an impact contact surface 11 and a first connecting portion 12;
a base 3 having a mounting portion 31 and a second connecting portion 32;
the strain testing part 2 is arranged between the impact part 1 and the base 3, a third connecting part 21 and a fourth connecting part 22 are respectively connected with the first connecting part 12 and the second connecting part 32, the impact part 1, the strain testing part 2 and the base 3 are connected into a whole, and a strain testing area 23 for installing a strain gauge and a plurality of stress concentration areas are arranged at a preset position of the strain testing part 2.
With the help of the above technical scheme, the utility model discloses a tear impact load sensor through three integrative structural design, has increased overall structure's rigidity and response frequency, can be applicable to the tear impact test of high frequency response.
Wherein the impact part 1 is made of C12MoV, and a quenching layer with the depth of 2mm to 3mm and the hardness of more than HRC60 is formed on the surface layer of the impact contact surface 11 by high-frequency quenching. Through setting up the quenching layer, the hardness and the intensity of the impact contact surface 11 that directly produce tearing impact with the sample have been showing to increase, guarantee that the sensor does not produce indentation, defect or fracture when tearing impact.
The impact contact surface 11 of the impact part 1 is arc-shaped, the first connecting part 12 on the opposite surface is provided with a tenon, and the tenon and the mortise of the third connecting part 21 form a pair of tenon-and-mortise structures. By means of the arrangement of the mortise and tenon structure, the load transmission loss can be reduced, the effective transmission of the load is guaranteed, the stability of the structure can be improved, the load can be guaranteed to be still effectively transmitted after being impacted for many times, and particularly, the impact load is transmitted to the tenon through the mortise and tenon, so that the load transmission loss can be reduced, the effective transmission of the load is guaranteed, and the service life of the structure can be prolonged.
Wherein, the whole strain test part 2 is in a cuboid shape. The strain gauge region 23 is provided with a slot 25, and the strain gauge is mounted in the slot 25.
In this embodiment, the number of the slots 25 is two. Preferably, the two slots 25 are symmetrically disposed on the strain testing region 23. As shown in the figure, two slots 25 are respectively arranged on the left side surface and the right side surface of the cuboid.
In the preferred embodiment of the present invention, the depth of the slot 25 is less than half of the distance between the left and right sides, the depth of the slot 25 is not more than one third of the distance between the left and right sides, the slot 25 is cylindrical, and the diameter of the bottom surface of the cylinder is between two times and five times of the depth.
In this embodiment, the stress concentration region is provided as a stress concentration groove 24. Preferably, the stress concentrating grooves 24 are symmetrically disposed. As shown in the figure, the number of the stress concentration grooves 24 is four, the stress concentration grooves 24 are formed in the front side surface and the rear side surface, two stress concentration grooves 24 are formed in the front side surface and the rear side surface, and the stress concentration grooves 24 formed in the front side surface and the rear side surface are through grooves penetrating through the left side surface and the right side surface.
In the preferred embodiment of the present invention, the depth of the stress concentration groove 24 is between one-half to two times the depth of the slot 25, the width of the stress concentration groove 24 is between one-sixth to one-fourth the depth, and the bottom of the stress concentration groove 24 is provided with a chamfer, such as a fillet. Preferably, the radius of the fillet is 1/2 ± 1/3 of the width of the stress concentrating channel 24.
In any of the above embodiments, the strain test zone 23 does not intersect a stress concentration zone.
Preferably, the extension of the strain test zone 23 does not cross the extension of the stress concentration zone.
Preferably, the extension of the boundary of the strain test zone 23 does not intersect the extension of the boundary of the stress concentration zone.
In the present embodiment, the third connection portion 21 and the fourth connection portion 22 are provided on the top surface and the bottom surface of the strain gauge part 2, respectively.
Wherein the third connecting portion 21 comprises a groove formed on the top surface, and the fourth connecting portion 22 comprises a flange formed on the bottom surface.
Preferably, the groove extends in the connecting direction of the front side and the rear side, for example, the groove of the third connecting portion 21 is provided as a through groove that penetrates the front side and the rear side.
Preferably, the flange extends in the direction of connection of the front and rear sides, e.g. the flange of the fourth connecting portion 22 connects the front and rear sides.
In the preferred embodiment of the present invention, the third connecting portion 21 further includes a threaded connection structure disposed on the top surface, and the impact portion 1 is provided with a connection structure corresponding to the threaded connection structure of the third connecting portion 21.
The threaded connection structure of the third connection portion 21 may be a threaded hole opened on the top surface, and the threaded hole of the third connection portion 21 is preferably opened on the bottom of the groove of the third connection portion 21.
Correspondingly, the connection structure of the impact part 1 is a through hole, and a bolt passes through the through hole to be in threaded connection with the threaded hole of the third connection part 21, so that the impact part 1 and the strain testing part 2 are connected into a whole.
In any of the above embodiments, the threaded hole of the third connection portion 21 does not intersect with the strain test region 23 and the stress concentration region.
Preferably, the extension line of the threaded hole of the third connection portion 21 does not intersect with the extension line of the strain test section 23 and the extension line of the stress concentration section.
Preferably, the boundary extension line of the screw hole of the third connection portion 21 does not intersect with the boundary extension line of the strain test zone 23 and the boundary extension line of the stress concentration zone.
In specific implementation, the second connection portion 32 and the fourth connection portion 22 may form a pair of mortise and tenon structures. Preferably, the second connecting portion 32 is a mortise and the fourth connecting portion 22 is a tenon.
In any of the above embodiments, preferably, the plane of the second connecting portion 32 is larger than the plane of the fourth connecting portion 22; the plane of the fourth connecting part 22 is larger than the plane of the third connecting part 21; the third connection portion 21 is located on a plane larger than the plane of the first connection portion 12.
As shown in the figure, a step part with larger transverse size is arranged between the strain testing area 23 and the strain concentration area of the strain testing part 2 and the fourth connecting part 22, so that the sensor integrally forms a three-step structure, and the effective conduction of impact load is facilitated.
In this embodiment, the mounting portion 31 of the base 3 includes a mortise and a thread connection structure.
Concretely, this fourth of the twelve earthly branches groove sets up with fourth connecting portion 22 correspondingly, threaded connection structure can be the screw hole that begins at base 3, for example begin around base 3, base 3 is connected with external equipment through fourth of the twelve earthly branches groove, enough stable area of contact has both been guaranteed, be favorable to impact load's effective transmission, connection structure's lateral stability has been guaranteed again, be favorable to impact test's stability, still further fasten with it through threaded connection structure simultaneously, because what the sensor tested is to pressing to tearing impact load, the bolt is installed in the lower part, test load is not shunted, 23 complete bearing load in middle sensitive strain test district has been guaranteed, be favorable to impact load's effective transmission.
The first, second, third, fourth, etc. expressions herein are merely used as names for distinguishing between the respective components. The expressions front side, rear side, left side, right side, bottom, top, etc. are only used to indicate the relative positional relationship between the respective surfaces, and are not intended to limit the positions of actual processing, use, etc.
It is obvious to those skilled in the art that the above embodiments or some technical features thereof may be combined into a new embodiment without contradiction based on the technical solutions disclosed in the present invention.
Claims (10)
1. A tear impact load sensor, characterized in that it has:
an impact portion having an impact contact surface and a first connection portion;
a base having a mounting portion and a second connecting portion;
the strain testing part is arranged between the impact part and the base, the third connecting part and the fourth connecting part are respectively connected with the first connecting part and the second connecting part, the impact part, the strain testing part and the base are connected into a whole, and a strain testing area for installing a strain gauge and a plurality of stress concentration areas are arranged at a preset position of the strain testing part.
2. The tear impact load cell of claim 1, wherein:
the first connecting part and the third connecting part form a pair of mortise and tenon structures and/or;
the second connecting part and the fourth connecting part form a pair of mortise and tenon structures.
3. The tear impact load cell of claim 2, wherein:
the third connecting portion is still including locating the threaded connection structure of top surface, and the impact portion is provided with the connection structure corresponding with the threaded connection structure of third connecting portion.
4. The tear impact load cell of claim 1, wherein:
the surface layer of the impact contact surface of the impact portion has a through-hardened layer of a predetermined thickness.
5. The tear impact load cell of claim 1, wherein:
the strain testing area is provided with a slotted hole, and the strain gauge is arranged in the slotted hole.
6. The tear impact load cell of claim 5, wherein:
two symmetrically distributed circular slotted holes are arranged in the strain test area.
7. The tear impact load cell of claim 1, wherein:
the stress concentration area comprises four stress concentration grooves which are symmetrically distributed on the periphery of the strain test area.
8. The tear impact load cell of claim 1, wherein:
the strain test zone does not intersect the stress concentration zone.
9. The tear impact load cell of claim 1, wherein: the plane of the fourth connecting portion is larger than the plane of the third connecting portion, the plane of the third connecting portion is larger than the plane of the first connecting portion, and the plane of the second connecting portion is larger than the plane of the fourth connecting portion.
10. The tear impact load sensor of claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, wherein: the installation part of the base comprises a mortise slot and a threaded connection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120738466.7U CN214622118U (en) | 2021-04-12 | 2021-04-12 | Tearing impact load sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120738466.7U CN214622118U (en) | 2021-04-12 | 2021-04-12 | Tearing impact load sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214622118U true CN214622118U (en) | 2021-11-05 |
Family
ID=78401429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120738466.7U Active CN214622118U (en) | 2021-04-12 | 2021-04-12 | Tearing impact load sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214622118U (en) |
-
2021
- 2021-04-12 CN CN202120738466.7U patent/CN214622118U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107063853B (en) | Clamp for testing shear performance of V-shaped notch beam sample | |
| CN214622118U (en) | Tearing impact load sensor | |
| CN112611304A (en) | Measuring tool and measuring method for measuring symmetry degree of plane and reference | |
| CN201152730Y (en) | Bearing mounting depth gauge | |
| CN2876764Y (en) | Material tester | |
| CN210147294U (en) | Pipeline groove detection sample plate | |
| CN211374315U (en) | Special fixture for measuring mechanical property sample of metal plate by indentation method | |
| CN115144255A (en) | Test auxiliary device that unidirectional fiber combined material interlaminar shear strength distributes | |
| CN114460338A (en) | Rotary probe contact module | |
| CN221221080U (en) | Bolt assembly | |
| CN210108195U (en) | Total length measuring tool for medium-large stator blades | |
| CN110345847B (en) | A auxiliary fixtures that is used for barrel outside part appearance precision to detect | |
| CN111879629A (en) | Multifunctional pin shaft performance detection device | |
| CN210442084U (en) | Suspension type bushing dynamic stiffness measuring clamp | |
| CN219798676U (en) | Calibration fixture and calibration system | |
| CN219284848U (en) | Clamp for detecting high-temperature mechanical property of sheet metal material | |
| CN218765003U (en) | Adjustable detection jig | |
| CN219348440U (en) | Variable width static test fixture based on friction load-transferring large structure | |
| CN211927228U (en) | Novel energy testing device for large-deformation anchor rod drop hammer impact test | |
| CN217541735U (en) | Double-length shear blade acceptance inspection tool | |
| CN215177377U (en) | Bearing grinding groove position measuring device | |
| CN212778988U (en) | Automobile engine gearbox precision converter verifying attachment | |
| CN210346650U (en) | Concentricity inspection frock | |
| CN220625957U (en) | Auxiliary device for combined material shearing test | |
| CN213986876U (en) | Detect tool that FPC covers membrane hourglass punching press |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |