CN206648886U - A kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive - Google Patents
A kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive Download PDFInfo
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- CN206648886U CN206648886U CN201720235404.8U CN201720235404U CN206648886U CN 206648886 U CN206648886 U CN 206648886U CN 201720235404 U CN201720235404 U CN 201720235404U CN 206648886 U CN206648886 U CN 206648886U
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- sliding block
- top shoe
- deflection
- point bending
- excessive
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Abstract
The utility model discloses it is a kind of prevent that four-point bending amount of deflection is excessive when loaded area sliding device, including providing two bases of the bottom strong point and providing two piece fixtures of top-loaded point, the test specimen of pending four-point bending test is arranged between base and piece fixture；The device also includes distribution beam, sliding block and top shoe；Sliding block is provided with two, is fixedly mounted on the top of piece fixture；Top shoe is provided with two, is fixedly mounted on the bottom of distribution beam；Sliding block is connected with top shoe, and the joint face of sliding block and top shoe is sphere.The utility model by the slip between the convex surface of top shoe and the concave surface of sliding block, can prevent sliding of the loaded area on test specimen, simple in construction, arrangement is convenient, and has preferable test effect when Large Deflection Deformation occurs for test specimen.
Description
Technical field
Four-point bending test engineering device technique field is the utility model is related to, more particularly to one kind prevents four-point bending is scratched from spending
The device of loaded area sliding when big.
Background technology
Four-point bending test can produce simple bending section between two load(ing) points, and the bending resistance available for measurement large scale structure is firm
Degree, including steel construction and mixed mud structure.The four-point bending test of usual large scale structure can not use existing four-point bending ten thousand
The loading force of oil overhold, is only distributed evenly on two rigidly connected load(ing) points by energy testing machine by a distribution beam.When
When test specimen is in small deflection deformation, the test method can meet required precision.But when structural bending amount of deflection is excessive, due to
Load(ing) point is rigidly fixed in distribution beam, so the position of loaded area can change on test specimen, so as to cause load
Arm of force size change, influence test accuracy.
Utility model content
When the technical problems to be solved in the utility model is Large Deflection Deformation occurs for test specimen in the prior art, stand under load
The position in region can change, the defects of influenceing test accuracy, there is provided one kind prevents stand under load area when four-point bending amount of deflection is excessive
The device of domain sliding.
Technical scheme is used by the utility model solves its technical problem：
The utility model provides a kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive, including provides bottom
Two bases of portion's strong point and two piece fixtures for providing top-loaded point, the test specimen of pending four-point bending test are set
Between base and piece fixture；
The device also includes distribution beam, sliding block and top shoe；Sliding block is provided with two, is fixedly mounted on piece fixture
Top；Top shoe is provided with two, is fixedly mounted on the bottom of distribution beam；Sliding block is connected with top shoe, and glides
The joint face of block and top shoe is sphere.
Further, the upper surface of sliding block of the present utility model is spherical concave surface, and the lower surface of top shoe is spherical male
Face.
Further, the sphere of sliding block of the present utility model is consistent with the curvature of the sphere of top shoe.
Further, mutual axial symmetry between two bases of the present utility model, mutual axle pair between two piece fixtures
Claim, and base is identical with the symmetry axis of piece fixture.
Further, the shape of sliding block and top shoe of the present utility model is cylinder.
Further, sliding block of the present utility model is with being provided with the installation pedestal for fixed installation on top shoe.
Further, screw is provided with the installation pedestal of sliding block of the present utility model, passes through trip bolt and test specimen
Fixture is connected.
Further, screw is provided with the installation pedestal of top shoe of the present utility model, passes through trip bolt and distribution
Beam is connected.
Beneficial effect is caused by the utility model：It is of the present utility model to prevent loaded area when four-point bending amount of deflection is excessive
The device of sliding, on the basis of existing System for Large-scale Specimen four-point bending test method, using the principle of universal joint, load(ing) point with by
The top shoe and sliding block that increase can be slided relatively between load region, simple in construction, arrangement conveniently, can improve test accuracy；
Meanwhile the device can make load(ing) point remain that face contacts with loading area, test accuracy can be further improved.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is the top shoe and sliding block mating connection schematic diagram of the utility model embodiment；
Fig. 3 is the top shoe top view of the utility model embodiment；
Fig. 4 is the top shoe profile of the utility model embodiment；
Fig. 5 is the sliding block top view of the utility model embodiment；
Fig. 6 is the sliding block profile of the utility model embodiment；
In figure：1st, distribution beam；2nd, test specimen；3rd, base；4th, piece fixture；5th, sliding block；6th, top shoe.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.
As shown in figure 1, the device for preventing loaded area sliding when four-point bending amount of deflection is excessive of the utility model embodiment,
Including providing two bases 3 of the bottom strong point and providing two piece fixtures 4 of top-loaded point, pending four-point bending examination
The test specimen 2 tested is arranged between base 3 and piece fixture 4；
The device also includes distribution beam 1, sliding block 5 and top shoe 6；Sliding block 5 is provided with two, is fixedly mounted on test specimen
The top of fixture 4；Top shoe 6 is provided with two, is fixedly mounted on the bottom of distribution beam 1；Sliding block 5 coordinates with top shoe 6 and connected
Connect, and the joint face of sliding block 5 and top shoe 6 is sphere.
The upper surface of sliding block 5 is spherical concave surface, and the lower surface of top shoe 6 is spherical convex surface.The sphere of sliding block 5 with it is upper
The curvature of the sphere of sliding block 6 is consistent.
Mutual axial symmetry between two bases 3, mutual axial symmetry between two piece fixtures 4, and base 3 and piece fixture
4 symmetry axis is identical.
The shape of sliding block 5 and top shoe 6 is cylinder.Sliding block 5 on top shoe 6 with being provided with for fixed peace
The installation pedestal of dress.Screw is provided with the installation pedestal of sliding block 5, is connected by trip bolt with piece fixture 4.Top shoe
Screw is provided with 6 installation pedestal, is connected by trip bolt with distribution beam 1.
When Large Deflection Deformation occurs for test specimen, loaded area can be prevented by the slip between top shoe 6 and sliding block 5
Sliding.
The utility model embodiment is slided from engineering practice by being arranged between four-point bending test specimen and distribution beam
Block, when Large Deflection Deformation occurs for test specimen, by the slip between upper sliding block, the sliding of load(ing) point is prevented, avoids the arm of force
Change caused by test error.
To achieve the above object, technical scheme is as follows used by the utility model embodiment：
A kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive, including top shoe and sliding block.Upper cunning
Block bottom is convex design, is concave design at the top of sliding block, the curvature of the two curved surface is consistent, and top shoe can be in sliding block
Snugly slide completely.During use, top shoe is fixed on distribution beam lower end, and sliding block is fixed on the top of piece fixture.
During test specimen amount of deflection becomes larger, top shoe slides in sliding block, avoids the loaded area on test specimen with examination
Part amount of deflection changes and caused movement.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Claims (8)
1. a kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive, including two bottoms of the bottom strong point are provided
Seat (3) and two piece fixtures (4) for providing top-loaded point, the test specimen (2) of pending four-point bending test are arranged on base
(3) between piece fixture (4), it is characterised in that：
The device also includes distribution beam (1), sliding block (5) and top shoe (6)；Sliding block (5) is provided with two, is fixedly mounted on
The top of piece fixture (4)；Top shoe (6) is provided with two, is fixedly mounted on the bottom of distribution beam (1)；Sliding block (5) with it is upper
Sliding block (6) is connected, and the joint face of sliding block (5) and top shoe (6) is sphere.
2. the device according to claim 1 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
The upper surface of sliding block (5) is spherical concave surface, and the lower surface of top shoe (6) is spherical convex surface.
3. the device according to claim 1 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
The sphere of sliding block (5) is consistent with the curvature of the sphere of top shoe (6).
4. the device according to claim 1 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
Mutual axial symmetry between two bases (3), mutual axial symmetry between two piece fixtures (4), and base (3) and piece fixture
(4) symmetry axis is identical.
5. the device according to claim 1 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
The shape of sliding block (5) and top shoe (6) is cylinder.
6. the device according to claim 1 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
Sliding block (5) is with being provided with the installation pedestal for fixed installation on top shoe (6).
7. the device according to claim 6 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
Screw is provided with the installation pedestal of sliding block (5), is connected by trip bolt with piece fixture (4).
8. the device according to claim 1 for preventing that loaded area slides when four-point bending amount of deflection is excessive, it is characterised in that
Screw is provided with the installation pedestal of top shoe (6), is connected by trip bolt with distribution beam (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720235404.8U CN206648886U (en) | 2017-03-10 | 2017-03-10 | A kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720235404.8U CN206648886U (en) | 2017-03-10 | 2017-03-10 | A kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206648886U true CN206648886U (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720235404.8U Active CN206648886U (en) | 2017-03-10 | 2017-03-10 | A kind of device for preventing that loaded area slides when four-point bending amount of deflection is excessive |
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| Country | Link |
|---|---|
| CN (1) | CN206648886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735687A (en) * | 2020-06-09 | 2020-10-02 | 东南大学 | Four-point bending device for integral stability test of loading point constraint type steel beam |
-
2017
- 2017-03-10 CN CN201720235404.8U patent/CN206648886U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735687A (en) * | 2020-06-09 | 2020-10-02 | 东南大学 | Four-point bending device for integral stability test of loading point constraint type steel beam |
| CN111735687B (en) * | 2020-06-09 | 2022-04-05 | 东南大学 | Four-point bending device for integral stability test of loading point constraint type steel beam |
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