CN208766895U - A kind of beam of uniform strength calibration equipment - Google Patents
A kind of beam of uniform strength calibration equipment Download PDFInfo
- Publication number
- CN208766895U CN208766895U CN201820633250.2U CN201820633250U CN208766895U CN 208766895 U CN208766895 U CN 208766895U CN 201820633250 U CN201820633250 U CN 201820633250U CN 208766895 U CN208766895 U CN 208766895U
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- China
- Prior art keywords
- uniform strength
- ontology
- pedestal
- foil gauge
- clamping plate
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Abstract
The utility model relates to a kind of beam of uniform strength calibration equipments, technical solution is, pedestal side is provided with vertical column, one end of beam of uniform strength ontology is fixedly connected with the upper end of the column, load bar is connected on beam of uniform strength ontology far from column one end, one end of load bar and beam of uniform strength ontology, which clamp, to be connected, the other end is equipped with the drawstring stretched out downward vertically, loading mechanism is provided on the pedestal of the underface of drawstring, beam of uniform strength body upper surface is provided with multiple the first uniformly distributed foil gauges, the lower surface of beam of uniform strength ontology is provided with the second foil gauge with the vertical face of the first foil gauge, the utility model can equably multistage loadings by slowly rotation handwheel, and the strain value of test specimen to be measured is directly read by foil gauge, change to intuitively embody the width of the constant beam of uniform strength of thickness with the distance change away from power load(ing) point Rule, and can be verified.
Description
Technical field
The utility model relates to mechanics teaching experimental provision, especially a kind of beam of uniform strength calibration equipment.
Background technique
Experimental teaching is an important component of course teaching, to the ability of practice, the innovative design energy for improving student
Power has great importance.The bending stress in each section of the beam of uniform strength, that is, beam is identical, then should be corresponding with the size of moment of flexure
Change sectional dimension, to keep same intensity, students ' understanding and is familiar with the beam of uniform strength to allow, various sides are taken in teaching
Method, but effect is unsatisfactory, not intuitively, and can not verify, it is difficult to the understanding and understanding for improving student are developed a kind of straight
Seeing, facilitate teaching, being easy to the beam of uniform strength instructional device of student's understanding is those skilled in the art's concern.
Utility model content
For above situation, for the defect for overcoming the prior art, the purpose of the utility model is just to provide a kind of equal strength
Beam calibration equipment can effectively solve the problems, such as beam of uniform strength laboratory teaching.
The technical solution that the utility model solves is:
A kind of beam of uniform strength calibration equipment, including pedestal and beam of uniform strength ontology, pedestal side are provided with vertical column,
One end of beam of uniform strength ontology is fixedly connected with the upper end of the column, and the other end protrudes horizontally up and is located above pedestal, far from column one
It is connected on the beam of uniform strength ontology at end in horizontally disposed load bar, one end of load bar and beam of uniform strength ontology clamp and connect
It connects, the other end is equipped with the drawstring stretched out downward vertically, is provided with loading mechanism, the load machine on the pedestal of the underface of drawstring
Structure includes that telescopic rod flexible along the vertical direction, the force snesor for being fixed on the telescopic rod upper end and the driving telescopic rod are stretched
The handwheel of contracting, the telescopic rod include the casing being vertically arranged on pedestal, are coated in casing and glide upwards along quill
Dynamic slide post, relatively unrotatable between slide post and casing, the pedestal below slide post is provided with cavity structure, cavity knot
It is provided with bearing block in structure, the drive shaft being vertically arranged, the upper end of drive shaft and slide post is housed through first bearing on bearing block
Lower thread connection, slide post lower part is fixed to be equipped with the first angular wheel, through second bearing equipped with lateral on the side wall of pedestal
Drive shaft laterally drives axis and protrudes into one end of cavity structure equipped with the second angular wheel engaged with the first angular wheel, handwheel
Be fixed on laterally drive axis extend outside the base side one end on, the flexible driving structure of telescopic rod is constituted, on beam of uniform strength ontology
Surface is provided with multiple the first uniformly distributed foil gauges, and the lower surface of beam of uniform strength ontology is provided with and the vertical face of the first foil gauge
The second foil gauge.
The handle extended perpendicularly out outward is provided on the handwheel.
The load bar includes the body of rod, and body of rod rear end is evenly equipped with multiple connections for connecting with drawstring along its length
Hole, lever front end are provided with the clamp structure for being fixedly connected with beam of uniform strength ontology, and the clamp structure includes that setting exists
Rear jaw clamping plate on lever front end end face and the lug boss that lever front end top is arranged in are provided on lug boss and are provided with front and back
The perforation of perforation, the axial direction of perforation and the length direction of the body of rod are parallel, and screw rod is coated in perforation, and the front end of screw rod forward extends out
The front end of jaw clamping plate afterwards, stretch out on the end of one end be provided with extend downwardly and with the preceding jaw of rear jaw clamping plate face press from both sides
Plate is provided with open slot on lug boss, screw position regulating wheel is installed on screw rod, screw position regulating wheel is located at open slot
It is interior, so that it is bound in open slot always in rotary course, the position adjustment structure of jaw clamping plate before constituting.
The first teeth, preceding jaw clamping plate and rear jaw are provided on the right opposite of jaw clamping plate and preceding jaw clamping plate after described
It is provided with the second teeth corresponding with the first teeth on the right opposite of clamping plate, constitutes Anti-slip type clamp structure.
The upper end of the column face is provided with horizontal supporting plate, is provided with pressing plate, one end of beam of uniform strength ontology above supporting plate
It between supporting plate upper surface and pressing plate lower end surface, is fixed, is constituted by the tightened bolt presses being connected between pressing plate and supporting plate
The reassembling type connection structure of beam of uniform strength ontology.
The utility model structure novel is unique, and advantages of simple is easy to produce, easy to operate, can be equal by slowly rotating handwheel
Even ground multistage loadings, and directly read by foil gauge the strain value of test specimen to be measured, thus intuitively embody thickness it is constant etc.
The rule that the width of intensity beam changes with the distance change away from power load(ing) point, and can be verified, easy to use, effect
It is good, it is the innovation on material mechanics experiment device.
Detailed description of the invention
Fig. 1 is the main view of the utility model.
Fig. 2 is the top view of the utility model.
Fig. 3 is the cross-sectional view of the utility model telescopic rod lower part.
Fig. 4 is the connection schematic diagram of the utility model telescopic rod and load bar.
Fig. 5 is the utility model beam of uniform strength body upper surface the first strain gauge adhesion position view.
Fig. 6 is the utility model beam of uniform strength ontology lower surface the second strain gauge adhesion position view.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
It is provided by Fig. 1-6, the utility model includes pedestal 1 and beam of uniform strength ontology 7, and it is vertical that 1 side of pedestal is provided with
One end of column 2, beam of uniform strength ontology 7 is fixedly connected with 2 upper end of column, and the other end protrudes horizontally up and is located at 1 top of pedestal, far
It is connected on beam of uniform strength ontology from column one end in horizontally disposed load bar 13, one end of load bar 13 and the beam of uniform strength
Ontology clamps connection, and the other end is equipped with the drawstring 25 stretched out downward vertically, is provided with load on the pedestal of the underface of drawstring 25
Mechanism, the loading mechanism include telescopic rod flexible along the vertical direction, the force snesor 24 for being fixed on the telescopic rod upper end
With the handwheel 19 for driving the telescopic rod flexible, the telescopic rod includes the casing 21 being vertically arranged on pedestal, casing 21
Inside it is coated with the slide post 22 axially slided up and down along casing, relatively unrotatable between slide post 22 and casing 21, slide post
The pedestal of 22 lower sections is provided with cavity structure, and bearing block 16 is provided in cavity structure, is equipped on bearing block 16 through first bearing
The upper end of the drive shaft 23 being vertically arranged, drive shaft 23 is connect with the lower thread of slide post 22, the fixed dress in 22 lower part of slide post
There is the first angular wheel 14, is equipped on the side wall of pedestal through second bearing 17 and laterally drives axis 18, laterally driven axis 18 and protrude into sky
One end of cavity configuration is equipped with the second angular wheel 15 engaged with the first angular wheel 14, and handwheel 19, which is fixed on, laterally drives axis 18
It extends outside the base on one end of side, constitutes the flexible driving structure of telescopic rod, 7 upper surface of beam of uniform strength ontology is provided with multiple equal
First foil gauge 10a of cloth, the lower surface of beam of uniform strength ontology 7 is provided with answers with the second of the first vertical face of foil gauge 10a
Become piece 10b；The diameter of second angular wheel 15 less than the first angular wheel 14 diameter, so as to carry out by a small margin
Even reinforcing.
To guarantee using effect, the handle 20 extended perpendicularly out outward is provided on the handwheel 19；
The section of the slide post 22 is polygon, and such as quadrangle, triangle etc., 21 inner cavity of casing is and sliding column section
Corresponding polygon to make slide post that can not rotate relative to casing, but can make to glide thereon under screw drive
It is dynamic.
The lower end of the slide post 22 is provided with blind hole 22a, and blind hole 22a inner wall has an internal screw thread, 23 top of drive shaft it is outer
External screw thread corresponding with internal screw thread is provided on wall, the top of drive shaft 23 is by external screw thread and internal screw thread spinning in blind hole
Interior, the upper end of the slide post 22 is provided with the threaded connection column 22b for connecting with force snesor 24.
Connecting flange 11 is provided on 21 outer wall of described sleeve pipe, connecting flange 11 is fixed on pedestal by connecting bolt 12
On, the fixed connection structure between forming sleeves 21 and pedestal.
The load bar 13 includes the body of rod 131, and 131 rear end of the body of rod is evenly equipped with multiple for connecting with drawstring 25 along its length
The connecting hole 132 connect, 131 front end of the body of rod are provided with the clamp structure for being fixedly connected with beam of uniform strength ontology 7, the clamp
Structure includes the rear jaw clamping plate 138 being arranged in 131 front end surface of the body of rod and the lug boss that 131 upper front end of the body of rod is arranged in
133, it is provided on lug boss 133 and is provided with the perforation that front and back penetrates through, the axial direction of perforation is parallel with the length direction of the body of rod 131, wears
Screw rod 134 is coated in hole, the front end of screw rod forward extends out the front end of rear jaw clamping plate 138, stretches out on the end of one end and be arranged
There is the preceding jaw clamping plate 137 extended downwardly and with rear 138 face of jaw clamping plate, is provided with open slot 139, spiral shell on lug boss 133
Screw position regulating wheel 136 is installed on bar, screw position regulating wheel 136 is located in open slot 139, makes it in rotary course
Always it is bound in open slot 139, the position adjustment structure of jaw clamping plate 137 before constituting.
The first teeth 138a, preceding jaw folder are provided on jaw clamping plate 138 and the right opposite of preceding jaw clamping plate 137 after described
It is provided with second teeth 137a corresponding with the first teeth 138a on plate 137 and the right opposite of rear jaw clamping plate 138, constitutes
Anti-slip type clamp structure.
It is provided with screw flight 135 on screw rod 134, is provided on 136 inner wall of screw position regulating wheel and screw flight 135
Corresponding external screw thread, rotary screw position regulating wheel can not be moved forward and backward since itself is bound in open slot,
Under threaded function, screw rod is moved forward and backward, to drive the preceding jaw clamping plate 137 of screw front end to be moved forward and backward, to make rear jaw
Clamping plate 138 and the gap of preceding jaw clamping plate 137 increase or reduce, and step up test specimen to be measured, thus make load bar with it is various sizes of
Beam of uniform strength ontology is fixedly connected.
There are multiple connecting holes 132 in 131 rear end of the body of rod, and when beam of uniform strength body width changes, selectable position is closed
Suitable connecting hole carries out installation drawstring.
Be provided on the pedestal it is corresponding with the first foil gauge 10a, the second foil gauge 10b, for read respectively answer
Become the deformeter 8 of piece strain value, the output end of the output end of the first foil gauge 10a and the second foil gauge 10b respectively with deformeter 8
Input terminal be connected.
Deformeter can show that the strain value of the first foil gauge, the second foil gauge, deformeter and foil gauge are commercially available existing
There is product, if Qinhuangdao is pulled together the deformeter of the model XL2102S of Science and Technology Development Co., Ltd.'s production and selling, the ocean of Beijing one
The foil gauge of the model BX120-5AA of Ying Zhen measuring technology Co., Ltd sale；
Measuring instrument corresponding with force snesor 24, for reading force snesor payload values is provided on the pedestal
9, the output end of force snesor 24 is connected with the input terminal of measuring instrument 9.The force snesor is connect with measuring instrument by signal wire,
Measuring instrument can show that load value, sensor and measuring instrument are commercially available existing product, as Qinhuangdao scientific and technological development of pulling together has
The force snesor for the model XL1153-1t that limit company produces and sells, the measuring instrument of model XL2116A.
The thickness of the beam of uniform strength ontology 7 is equal, and the first foil gauge 10a is evenly arranged on 7 upper surface of beam of uniform strength ontology
Center line on, the second foil gauge 10b is evenly arranged on the center line of 7 lower surface of beam of uniform strength ontology.
2 upper surface of column is provided with horizontal supporting plate 3, and pressing plate 4 is provided with above supporting plate 3, beam of uniform strength ontology 7
One end is located between 4 lower end surface of 3 upper surface of supporting plate and pressing plate, is compressed by the fastening bolt 5 being connected between pressing plate 4 and supporting plate 3
It is fixed, constitute the reassembling type connection structure of beam of uniform strength ontology.
1 bottom of pedestal is provided with supporting leg 6.
When the utility model is used, foil gauge is pasted on beam of uniform strength ontology first, the specific steps are as follows:
1. checking and sorting foil gauge, visual examination should be carried out to foil gauge before patch and resistance value measures.Check foil gauge
Sensitive grid whether there is or not rust staining, base and coating, whether there is or not damaged, whether lead secured.It is disconnected that resistance value measurement checks whether foil gauge has
Road, open circuit conditions.
2. adhesive surface prepares, the greasy dirt, paint, rust staining of surface of test piece are removed, polish microgroove with emery cloth intersection to increase
Cohesive force is then stained with alcohol with absorbent cotton and is cleaned, and draws patch position line with steel drawing needle.Absorbent cotton is taken to be stained with alcohol scouring again,
Until finally requiring to lose stain on rayon balls.
3. patch respectively applies one layer of 502 uniform and thin glue, will answer on foil gauge bottom surface and processed adhesive surface
Change piece is placed on to be finished the place of position line and adjusts good position in advance, is then covered plastic film, is squeezed out foil gauge with finger
Following bubble is bonded foil gauge completely with test specimen.
4. pasting connecting terminal, the place 5-10mm is used before foil gauge lead pastes with pasting the identical method of foil gauge
Connecting terminal.
5. the welding and fixation of measure traverse line, conducting wire and foil gauge lead are all welded on connecting terminal, led what is welded
Line is fixed on the way in test specimen, and fixing means can be pasted using adhesive plaster, can also be pasted using 502.Strain gauge adhesion position is such as
Fig. 5, shown in 6.
After the completion of strain gauge adhesion, one end of beam of uniform strength ontology is fixed on above column, load bar 13 passes through preceding pincers
Mouth clamping plate 137 and rear jaw clamping plate 138 clamp beam of uniform strength ontology, and the horizontal setting of load bar, load bar end passes through
Suitable connecting hole installation drawstring is selected, and is connected by drawstring with force snesor, loading scheme is then drafted,
Draft loading scheme, this experiment uses method of addition, the step increment methods such as classification, is loaded after errorless on inspection.It is suitable
Hour hands slowly rotate handwheel and load are gradually added to P0, as preloading, then long-pressing dynamometer reset key is by initial reading P0Clearly
Zero, balance key resets deformeter initial reading on long-pressing deformeter.Then slowly equably multistage loadings, every increase level-one carry
The load increment Δ P of lotus records the reading ε of each channel foil gauge of a deformeter, and while recording data, check at any time
Whether whether reading strain increment Delta ε meets linear variability law, normal with judgment experiment.
Experiment must carry out in proportional limit, therefore maximum stress value cannot be greater than proportional limit.Test maximum load Pmax
Generally according to Materials Yield Limit σs70%~80% estimated:
Preload P0Generally press Pmax10% set；
5~7 grades of loads of experiment point, to reduce error, the level divided should make the strain-ga(u)ge reading after every grade of load have
Apparent variation.
After experiment, rotates counterclockwise handwheel unloading, closes power supply, clear up experimental field, and by instrument, equipment
It restores.
By the data of record, the corresponding strain value of each foil gauge is observed, if shown under the effect of same load
Strain value numerical value difference can verify that the beam then in 5 μ ε as the beam of uniform strength, structural visual, experimental data can also pass through equal strength
Beam theory calculation formula is calculated and then is verified, and compares two kinds of interpretation of result error Producing reasons.
By above situation it should be apparent that the utility model structure novel is unique, advantages of simple is easy to produce, easily grasps
Make, by slowly rotate handwheel can equably multistage loadings, and directly read by foil gauge the strain value of test specimen to be measured, from
And the rule that the width for intuitively embodying the constant beam of uniform strength of thickness changes with the distance change away from power load(ing) point, and can
It is verified, easy to use, effect is good, is the innovation on material mechanics experiment device.
Claims (9)
1. a kind of beam of uniform strength calibration equipment, including pedestal (1) and beam of uniform strength ontology (7), which is characterized in that pedestal (1) one
Side is provided with vertical column (2), and one end of beam of uniform strength ontology (7) is fixedly connected with column (2) upper end, and other end level is stretched
Out and it is located above pedestal (1), is connected on the beam of uniform strength ontology far from column one end in horizontally disposed load bar (13),
One end of load bar (13) and beam of uniform strength ontology, which clamp, to be connected, and the other end is equipped with the drawstring (25) stretched out downward vertically, drawstring
(25) loading mechanism is provided on the pedestal of underface, the loading mechanism includes telescopic rod flexible along the vertical direction, consolidates
It is scheduled on the force snesor (24) of the telescopic rod upper end and the handwheel (19) that the driving telescopic rod is flexible, the telescopic rod packet
The casing (21) being vertically arranged on pedestal is included, is coated with the slide post (22) axially slided up and down along casing in casing (21),
Relatively unrotatable between slide post (22) and casing (21), the pedestal below slide post (22) is provided with cavity structure, cavity
It is provided in structure bearing block (16), the drive shaft (23) being vertically arranged, drive shaft is housed through first bearing on bearing block (16)
(23) upper end is connect with the lower thread of slide post (22), and slide post (22) lower part is fixed to be equipped with the first angular wheel (14),
One end that axis (18) protrudes into cavity structure is laterally driven equipped with axis (18) are laterally driven through second bearing (17) on the side wall of pedestal
Equipped with the second angular wheel (15) engaged with the first angular wheel (14), handwheel (19), which is fixed on, laterally drives axis (18) stretching
On one end of chassis outer side, the flexible driving structure of telescopic rod is constituted, beam of uniform strength ontology (7) upper surface is provided with multiple uniformly distributed
The first foil gauge (10a), the lower surface of beam of uniform strength ontology (7) is provided with the with the vertical face of the first foil gauge (10a)
Two foil gauges (10b).
2. beam of uniform strength calibration equipment according to claim 1, which is characterized in that be provided on the handwheel (19) to
The handle (20) extended perpendicularly out outside.
3. beam of uniform strength calibration equipment according to claim 1, which is characterized in that the load bar (13) includes the body of rod
(131), the body of rod (131) rear end is evenly equipped with multiple connecting holes (132) for connecting with drawstring (25), the body of rod along its length
(131) front end is provided with the clamp structure for being fixedly connected with beam of uniform strength ontology (7), and the clamp structure includes that setting exists
Rear jaw clamping plate (138) in the body of rod (131) front end surface and setting the body of rod (131) upper front end lug boss (133), it is convex
It rises to be provided on portion (133) and is provided with the perforation that front and back penetrates through, the axial direction of perforation is parallel with the length direction of the body of rod (131), perforation
It is inside coated with screw rod (134), the front end of screw rod forward extends out the front end of rear jaw clamping plate (138), stretches out on the end of one end and sets
It is equipped with the preceding jaw clamping plate (137) extended downwardly and with rear jaw clamping plate (138) face, lug boss is provided with opening on (133)
Slot (139) is installed with screw position regulating wheel (136) on screw rod, and screw position regulating wheel (136) is located in open slot (139),
It is bound in it always in rotary course open slot (139), the position adjustment structure of jaw clamping plate (137) before constituting.
4. beam of uniform strength calibration equipment according to claim 3, which is characterized in that jaw clamping plate (138) is with before after described
It is provided on the right opposite of jaw clamping plate (137) the first teeth (138a), preceding jaw clamping plate (137) and rear jaw clamping plate (138)
Right opposite on be provided with the second teeth (137a) corresponding with the first teeth (138a), constitute Anti-slip type clamp structure.
5. beam of uniform strength calibration equipment according to claim 1, which is characterized in that be provided on the pedestal and first
Foil gauge (10a), the second foil gauge (10b) be corresponding, deformeter (8) for reading each foil gauge strain value, and first answers
The output end of the output end and the second foil gauge (10b) that become piece (10a) is connected with the input terminal of deformeter (8) respectively.
6. beam of uniform strength calibration equipment according to claim 1, which is characterized in that be provided on the pedestal and passed with power
The corresponding measuring instrument (9) for reading force snesor payload values of sensor (24), the output end of force snesor (24) and measurement
The input terminal of instrument (9) is connected.
7. beam of uniform strength calibration equipment according to claim 1, which is characterized in that the beam of uniform strength ontology (7)
Thickness is equal, and the first foil gauge (10a) is evenly arranged on the center line of beam of uniform strength ontology (7) upper surface, the second foil gauge (10b)
It is evenly arranged on the center line of beam of uniform strength ontology (7) lower surface.
8. beam of uniform strength calibration equipment according to claim 1, which is characterized in that column (2) upper surface is provided with
Horizontal supporting plate (3), supporting plate (3) top are provided with pressing plate (4), and one end of beam of uniform strength ontology (7) is located at supporting plate (3) upper surface
Between pressing plate (4) lower end surface, it is fixed by the fastening bolt (5) being connected between pressing plate (4) and supporting plate (3), constitute etc.
The reassembling type connection structure of intensity beam ontology.
9. beam of uniform strength calibration equipment according to claim 1, which is characterized in that pedestal (1) bottom is provided with branch
Support leg (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820633250.2U CN208766895U (en) | 2018-04-28 | 2018-04-28 | A kind of beam of uniform strength calibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820633250.2U CN208766895U (en) | 2018-04-28 | 2018-04-28 | A kind of beam of uniform strength calibration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208766895U true CN208766895U (en) | 2019-04-19 |
Family
ID=66125979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820633250.2U Expired - Fee Related CN208766895U (en) | 2018-04-28 | 2018-04-28 | A kind of beam of uniform strength calibration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208766895U (en) |
-
2018
- 2018-04-28 CN CN201820633250.2U patent/CN208766895U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190419 Termination date: 20200428 |