CN209485861U - A kind of 4 points of curved experimental rigs - Google Patents
A kind of 4 points of curved experimental rigs Download PDFInfo
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- CN209485861U CN209485861U CN201822071884.6U CN201822071884U CN209485861U CN 209485861 U CN209485861 U CN 209485861U CN 201822071884 U CN201822071884 U CN 201822071884U CN 209485861 U CN209485861 U CN 209485861U
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Abstract
The utility model discloses a kind of 4 points of curved experimental rigs, including lower erecting bed and flexural pivot, a pair of of support component is installed on the lower erecting bed, the top of support component be equipped with first axle or with the second axis, test specimen is placed in first axle and the second axis, third axis and the 4th axis are placed in the upper surface of test specimen, third axis and the 4th axis are connect by scalable component with lower erecting bed, the both ends of first axle and the second axis are connect with junction steel plate respectively, junction steel plate is hinged with connecting rod, connecting rod and movable plate hinged shaft are hinged, movable plate is hinged on hinged shaft and is mounted on link block, link block is connect with flexural pivot, flexural pivot is connect with upper erecting bed；First axle, the second axis, third axis and the 4th axis are fixed on test specimen by scalable component, upper erecting bed drives flexural pivot to move up, flexural pivot drives junction steel plate to move up, junction steel plate drives the second first axle and the second axis to press test specimen, the upper surface of third axis and the 4th axis pressing test specimen, realizes 4 points of curved purposes of test specimen.
Description
Technical field
The present invention relates to a kind of 4 points of curved experimental rigs, belong to mechanical testing equipment field.
Background technique
Since rectangular coupon is easy to process, and it is specious, therefore, in concrete for hydraulic structure correlation test regulation, often
Recommend to carry out the test of fatigue fracture bending property using three-point bending beam or four_point bending beam.It is tried different from three-point bending beam
Part, four_point bending beam test specimen can be realized a uniform maximum stress region in its span, split to research concrete for hydraulic structure
Seam propagation behavior is particularly significant, and therefore, four_point bending beam test specimen is in terms of concrete for hydraulic structure fatigue behaviour and fracture propagation mechanism
Research in obtained extensively application.Four_point bending beam fatigue test requires load centering, particularly with the prefabricated crack of Intermediate Gray
Four_point bending beam test specimen, be to carry out the precondition of concrete for hydraulic structure Fatigue Cracking Test, but generally make at present in load pair
Therefore four_point bending beam fatigue experimental device, leads to test specimen it cannot be guaranteed that accurate centering, cannot achieve uniform load
Surface stress is unevenly distributed, and reduces stringency of test.For this purpose, it is curved to invent a kind of 4 points for can be realized adjusting centering in real time
Curved beam Fatigue Cracking Test fixture is of crucial importance.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of 4 points of curved experimental rigs,
Test piece upper part is equipped with flexural pivot, in 4 points of curved tests, by original 4 points it is curved drawing is converted by pressure, using flexural pivot, 4 points pairs
It is neutral good.
Technical solution: in order to solve the above technical problems, 4 points of curved experimental rigs of the invention, including lower erecting bed and ball
Hinge, is equipped with a pair of of support component on the lower erecting bed, the top of support component be equipped with first axle or with the second axis, test specimen
It is placed in first axle and the second axis, is placed with third axis and the 4th axis in the upper surface of test specimen, third axis and the 4th axis pass through
Scalable component is connect with lower erecting bed, and the both ends of first axle and the second axis are connect with junction steel plate respectively, junction steel plate and company
Extension bar is hinged, and connecting rod and movable plate hinged shaft are hinged, and movable plate is hinged on hinged shaft and is mounted on link block, and link block and flexural pivot connect
It connects, flexural pivot is connect with upper erecting bed；First axle, the second axis, third axis and the 4th axis are fixed on test specimen by scalable component
On, upper erecting bed drives flexural pivot to move up, and flexural pivot drives junction steel plate to move up, and junction steel plate drives the second first axle and the second axis pressure
Test specimen, the upper surface of third axis and the 4th axis pressing test specimen, realizes 4 points of curved purposes of test specimen.
Preferably, the scalable component includes upper connecting rod, locking cap and lower connector, set at the top of the upper connecting rod
There is connection ring connection ring set on third axis or the 4th axis, upper connecting rod is equipped with screw thread, and upper connecting rod connecting rod bottom is equipped with boss,
Cap sleeve is locked on boss, locking cap is equipped with internal screw thread, and lower connector is U-shape, and the both ends of lower connector are equipped with external screw thread, lock
Tight cap is connect by screw thread with lower connector；Third axis or the 4th axis are placed on test specimen upper surface, tighten locking cap, locking cap
It is fixed on test specimen by third axis or with the 4th axis, is locked locking cap by nut.
Preferably, the flexural pivot includes ontology and connecting column, cavity is equipped in the ontology, cavity bottom is equipped with interior spiral shell
Line, cavity top are arc shape, and the bottom end of connecting column is equipped with arc boss, and the bottom of cavity is equipped with through-hole, and connecting column passes through logical
The bottom in hole, cavity is equipped with connecting plate by screw thread, and connecting plate is fixedly connected with link block.
Preferably, the support component includes left support column and right support column, left support column and right support column lower end are set
There is guide pad, T-slot is equipped on lower erecting bed, guide pad is moved along T-slot, and the top of left support column and right support column is equipped with
Place the arc groove of first axle or the second axis.
The utility model has the advantages that 4 points of curved experimental rigs of the invention, are equipped with flexural pivot in test piece upper part, it, will in 4 points of curved tests
Original 4 points curved to be converted into drawings by pressure, and using flexural pivot, 4 points to neutral good, and pass through lower connector and upper connecting rod, reality
Now to the fixation of third axis and the 4th axis；Due to support component and scalable component, it can be achieved that the test specimen to all size carries out
4 points of curved tests, the high flexural pivot of utilization ratio of device.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing apparatus.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is the structural schematic diagram of scalable component.
Fig. 4 is the structural schematic diagram of flexural pivot.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Figures 2 to 4,4 points of curved experimental rigs of the invention, including lower erecting bed 12 and flexural pivot 1, the lower peace
A pair of of support component 11 is installed on dress platform 12, the top of support component 11 is equipped with first axle 6 and the second axis 10, and test specimen 5 is put
It sets in first axle 6 and the second axis 10, is placed with third axis 4 and the 4th axis 8, third axis 4 and the 4th axis in the upper surface of test specimen 5
8 are connect by scalable component 7 with lower erecting bed 12, and the both ends of first axle 6 and the second axis 10 are connect with junction steel plate 9 respectively,
Junction steel plate 9 has two pieces, is located at the two sides of test specimen, and junction steel plate 9 and connecting rod 3 are hinged, and connecting rod 3 and hinged shaft 2 are hinged,
Hinged shaft 2 is mounted on link block, and link block is connect with flexural pivot 1, and flexural pivot 1 is connect with upper erecting bed.First axle, the second axis, third
Axis and the 4th axis both ends are equipped with screw thread, and first axle, the second axis, third axis and the 4th axis both ends pass through nut and limit four axis
Position.First axle 6, the second axis 10, third axis 4 and the 4th axis 8 are fixed on test specimen 5 by scalable component 7, upper erecting bed band
Dynamic flexural pivot 1 moves up, and flexural pivot 1 drives junction steel plate 9 to move up, and junction steel plate 9 drives first axle 6 and the second axis 10 to press test specimen 5, third
The upper surface of axis 4 and the 4th axis 8 pressing test specimen 5, realizes 5 four points of curved purposes of test specimen.
In the present invention, the scalable component 7 includes upper connecting rod 71, locking cap 73 and lower connector 74, the upper company
The top of bar 71 is equipped with connection ring set on third axis 4 or the 4th axis 8, and upper connecting rod 71 is equipped with screw thread, and 71 bottom of upper connecting rod is set
Have boss, 73 sets of locking cap on boss, locking cap 73 be equipped with internal screw thread, lower connector 74 be U-shape, the two of lower connector 74
End is equipped with external screw thread, and locking cap 73 is connect by screw thread with lower connector 74；Third axis 4 or the 4th axis 8 are placed on test specimen 5
Locking cap 73 is tightened on surface, and third axis 4 and the 4th axis 8 are fixed on test specimen 5 by locking cap 73, by nut 72 by locking cap
73 lockings.
In the present invention, the flexural pivot 1 includes ontology 14 and connecting column 13, is equipped with cavity, cavity bottom in the ontology 14
Portion is equipped with internal screw thread, and cavity top is arc shape, and the bottom end of connecting column 13 is equipped with arc boss, and the bottom of cavity is equipped with through-hole,
Connecting column 13 passes through through-hole, and the bottom of cavity is equipped with connecting plate 15 by screw thread, and connecting plate 15 is fixedly connected with link block.
In the present invention, the support component 11 includes left support column and right support column, under left support column and right support column
End is equipped with guide pad, and T-slot is equipped on lower erecting bed 12, and guide pad is moved along T-slot, the top of left support column and right support column
End is equipped with the arc groove for placing first axle 6 or the second axis 10.
In the use of the present invention, the position of adjustment guide pad, determines the position of first axle 6 and the second axis 10, test specimen is placed
5, locking cap 73 is turned, third axis 4 and the 4th axis 8 are pressed on 5 surface of test specimen, tighten nut 72, locking cap 73 is locked, is opened
Dynamic test machine, upper erecting bed drive flexural pivot 1 to move up, and flexural pivot 1 drives junction steel plate 9 to move up, and junction steel plate 9 drives 6 He of first axle
Second axis 10 presses test specimen 5, and 5 four points of curved purposes of test specimen are realized in the upper surface of third axis 4 and the 4th axis 8 pressing test specimen 5.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of 4 points of curved experimental rigs, it is characterised in that: including lower erecting bed and flexural pivot, be equipped with one on the lower erecting bed
To support component, the top of support component is equipped with first axle and the second axis, and test specimen is placed in first axle and the second axis, is trying
The upper surface of part is placed with third axis and the 4th axis, and third axis and the 4th axis are connect by scalable component with lower erecting bed, the
The both ends of one axis and the second axis are connect with junction steel plate respectively, and junction steel plate is hinged with connecting rod, and connecting rod is hinged with hinged shaft, hinge
Axis is mounted on link block, and link block is connect with flexural pivot, and flexural pivot is connect with upper erecting bed；By scalable component by first axle,
Second axis, third axis and the 4th axis are fixed on test specimen, and upper erecting bed drives flexural pivot to move up, and flexural pivot drives junction steel plate to move up,
Junction steel plate drives first axle and the second axis presses test specimen, and the upper surface of third axis and the 4th axis pressing test specimen realizes 4 points of test specimen
Curved purpose.
2. 4 points of curved experimental rigs according to claim 1, it is characterised in that: the scalable component include upper connecting rod,
Locking cap and lower connector, the top of the upper connecting rod are equipped with connection ring set on third axis or the 4th axis, and upper connecting rod is equipped with
Screw thread, upper connecting rod bottom are equipped with boss, lock cap sleeve on boss, and locking cap is equipped with internal screw thread, and lower connector is U-shape, under
The both ends of connector are equipped with external screw thread, and locking cap is connect by screw thread with lower connector；Third axis or the 4th axis are placed on examination
Locking cap is tightened in part upper surface, and third axis and the 4th axis are fixed on test specimen by locking cap, is locked locking cap by nut.
3. 4 points of curved experimental rigs according to claim 1, it is characterised in that: the flexural pivot includes ontology and connecting column,
Cavity is equipped in the ontology, cavity bottom is equipped with internal screw thread, and cavity top is arc shape, and it is convex that the bottom end of connecting column is equipped with arc
Platform, the bottom of cavity are equipped with through-hole, and connecting column passes through through-hole, and the bottom of cavity is equipped with connecting plate by screw thread, connecting plate and
Link block is fixedly connected.
4. 4 points of curved experimental rigs according to claim 1, it is characterised in that: the support component include left support column and
Right support column, left support column and right support column lower end are equipped with guide pad, T-slot are equipped on lower erecting bed, guide pad is along T-slot
Mobile, the top of left support column and right support column is equipped with the arc groove for placing first axle or the second axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071884.6U CN209485861U (en) | 2018-12-11 | 2018-12-11 | A kind of 4 points of curved experimental rigs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822071884.6U CN209485861U (en) | 2018-12-11 | 2018-12-11 | A kind of 4 points of curved experimental rigs |
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| Publication Number | Publication Date |
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| CN209485861U true CN209485861U (en) | 2019-10-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459304A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of 4 points of curved experimental rigs |
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2018
- 2018-12-11 CN CN201822071884.6U patent/CN209485861U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459304A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of 4 points of curved experimental rigs |
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