CN103528883A - Cam quantitative repeated loading device - Google Patents
Cam quantitative repeated loading device Download PDFInfo
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- CN103528883A CN103528883A CN201310485481.5A CN201310485481A CN103528883A CN 103528883 A CN103528883 A CN 103528883A CN 201310485481 A CN201310485481 A CN 201310485481A CN 103528883 A CN103528883 A CN 103528883A
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- cam
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- test piece
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Abstract
The invention provides a cam quantitative repeated loading device. The device comprises a base, wherein a trial die is arranged on the base, a spring used for supporting a concrete test piece is vertically arranged in the trial die; a cam used for loading the concrete test piece is arranged above the concrete test piece, and is connected with a speed reducer; the speed reducer is connected with a motor. According to the device, power is supplied to the cam by virtue of the arrangement of the motor, and the cam can be used for loading the concrete test piece, so that a fatigue test can be carried out. The cam quantitative repeated loading device is reasonable in design, simple in structure, convenient to assemble and distribute, and convenient to operate, can be used for changing the rotation frequency of the cam and controlling the loading frequency by regulating the reduction ratio of the speed reducer, can perform quantitative repeated loading to the concrete test piece, and can solve the problems that the loading frequency can only be controlled in a small range because a repeated loading device adopts servo electro-hydraulic control in the prior art.
Description
Technical field
The present invention relates to a kind of cement concrete test specimen quantitatively be repeated to loading fatigue test device, be specifically related to a kind of cam and quantitatively repeat charger.
Background technology
The device major part that now concrete is repeated to load is to control with servo electrohydraulic, due to the hysteresis quality of fluid, and incompressibility, cause the frequency loading can only be controlled in very little scope, and the heaviness that loads instrument causes expensive, and economic performance is greatly affected; In practical operation, need to make the evaluation to concrete performance for the loading force of specific size.So be necessary to provide a kind of device to the adjustable loading of concrete sample loading frequency.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned technology, provides a kind of cam quantitatively to repeat charger, and frequency that can controlled loading is carried out quantitative repeating to concrete sample and loaded, thereby carries out torture test.
For achieving the above object, the present invention adopts following technical scheme:
The present invention includes base, on described base, die trial is set, in die trial, is vertically provided for supporting the spring of concrete sample, support the cam that concrete sample top is provided for concrete sample to load, cam is connected with speed reduction unit, and speed reduction unit is connected with motor.
Between described base and concrete sample, be provided for testing the elasticity scale of cam to concrete sample loading force, elasticity scale is fixed in die trial.
Described elasticity scale and spring be arranged in parallel.
Described spring top is provided for supporting the flange of concrete sample.
Two double-screw bolts are vertically set in described die trial; Spring is 2, and is all sleeved on double-screw bolt.
Described cam is connected with speed reduction unit by spline.
With respect to prior art, the beneficial effect that the present invention has: the present invention provides power by motor is set to cam, cam can load concrete sample, thereby carry out torture test, the present invention is rational in infrastructure simple, install and lay convenient and simple operation, by regulating the reduction gear ratio of speed reduction unit, change the frequency that cam rotates, thereby the frequency of controlled loading, can be good at that concrete sample is carried out to quantitative repeating loads, overcome and in prior art, repeated charger and adopt servo electrohydraulic to control, loading frequency can only be controlled at the problem in very little scope.
Further, owing to being provided with elasticity scale, cam can be read by elasticity scale the loading force of concrete sample, and cam can be read by elasticity scale equally in the displacement of vertical direction.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the connection diagram of motor of the present invention, speed reduction unit and cam;
Wherein, 1 is cam, and 2 is die trial, and 3 is elasticity scale, and 4 is base, and 5 is spring, and 6 is double-screw bolt, and 7 is flange, and 8 is concrete sample, and 9 is speed reduction unit, and 10 is motor.
Embodiment
Below in conjunction with accompanying drawing explanation, the present invention is elaborated.
Referring to Fig. 1 and 2, the present invention includes base 4, on described base 4, die trial 2 is set, interior upper two double-screw bolts 6 that vertically arrange of die trial 2, fix a spring 5 on each double-screw bolt 6, the displacement about double-screw bolt 6 does not produce spring 5, the stability of assurance device.The top of spring 5 arranges flange 7, concrete sample to be detected 8 is set on flange 7,7 pairs of concrete samples 8 of flange play support, concrete sample 8 tops are provided for the cam 1 that concrete sample 8 is loaded, cam 1 is by spline joint on the output shaft of speed reduction unit 9, and the input shaft of speed reduction unit 9 is connected with motor 10; Between base 4 and concrete sample 8, arrange parallel with spring 5 for testing the elasticity scale 3 of cam to concrete sample 8 loading forces.
The manufacturing process of elasticity scale 3 of the present invention is as follows: need the spring A with certain stiffness factor, the stiffness factor of medi-spring A of the present invention is 0.5KN/cm, stiffness factor after spring A parallel connection is 1KN/cm, according to recklessly can law F=Kx, x is the deflection of spring A, thereby obtains the sizes values of the power that each scale is corresponding, such as 1cm corresponding be 1KN, position is marked on elasticity scale 3 left sides, obtains thus readings all on scale.Reading on scale is the size of cam 1 displacement and loading force.Elasticity scale 3 is fixed in die trial 2, and elasticity scale 3 tops flush with the lowermost end of concrete sample 8; The range of the test loading force of elasticity scale 3 is 16KN.
When the present invention works, motor 10 drives speed reduction unit 9 to rotate, produce certain rotating speed, speed reduction unit 9 changes the rotating speed of motor 10 and is with moving cam 1 to rotate, and cam 1 is connected with concrete sample 8 below, and concrete sample 8 is arranged in die trial 2, concrete sample 8 belows are withstood by the spring 5 of 2 flanged 7, spring 5 is fastened in the double-screw bolt 6 of base 4, make spring 5 do not produce left and right displacement, the stability of assurance device; In the fixing speed reduction unit 9 of cam 1, make to produce the movement of vertical direction, and the movement that does not produce other directions, cam 1 can read out by elasticity scale 3 in the size of the displacement of vertical direction, and the size of loading force also can read out by elasticity scale 3.
Compared with prior art, the present invention can, by regulating the reduction gear ratio of speed reduction unit, change the frequency that cam rotates, frequency that can controlled loading, carries out quantitative repeating to concrete sample and loads, thereby carry out torture test, and simple structure is directly perceived, be easy to realize.
Claims (6)
1. a cam quantitatively repeats charger, it is characterized in that, comprise base (4), die trial (2) is set on described base (4), in die trial (2), be vertically provided for supporting the spring (5) of concrete sample (8), support concrete sample (8) top and be provided for the cam (1) that concrete sample (8) is loaded, cam (1) is connected with the output shaft of speed reduction unit (9), and the input shaft of speed reduction unit (9) is connected with motor (10).
2. cam according to claim 1 quantitatively repeats charger, it is characterized in that, between described base (4) and concrete sample (8), be provided for testing the elasticity scale (3) of cam (1) to concrete sample (8) loading force, elasticity scale (3) is fixed in die trial (2).
3. cam according to claim 2 quantitatively repeats charger, it is characterized in that, described elasticity scale (3) and spring (5) be arranged in parallel.
4. cam according to claim 1 quantitatively repeats charger, it is characterized in that, described spring (5) top is provided for supporting the flange (7) of concrete sample (8).
5. cam according to claim 1 quantitatively repeats charger, it is characterized in that, two double-screw bolts (6) are vertically set in described die trial (2); Spring (5) is 2, and is all sleeved on double-screw bolt (6).
6. cam according to claim 1 quantitatively repeats charger, it is characterized in that, described cam (1) is connected with the output shaft of speed reduction unit (9) by spline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310485481.5A CN103528883A (en) | 2013-10-16 | 2013-10-16 | Cam quantitative repeated loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310485481.5A CN103528883A (en) | 2013-10-16 | 2013-10-16 | Cam quantitative repeated loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103528883A true CN103528883A (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310485481.5A Pending CN103528883A (en) | 2013-10-16 | 2013-10-16 | Cam quantitative repeated loading device |
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| CN (1) | CN103528883A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801727A (en) * | 2018-05-08 | 2018-11-13 | 华侨大学 | Rock soil test piece compaction apparatus |
| CN112782012A (en) * | 2021-02-25 | 2021-05-11 | 江苏新宏大集团有限公司 | Repeated automatic detection device and detection method |
| CN113640157A (en) * | 2021-08-24 | 2021-11-12 | 西南交通大学 | High-frequency loading device suitable for concrete |
Citations (9)
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| JPH09196837A (en) * | 1996-01-22 | 1997-07-31 | Nippon Steel Corp | Fatigue testing method provided with compound control system |
| JP2000097834A (en) * | 1998-09-18 | 2000-04-07 | Sintokogio Ltd | Heat-resisting fatigue test method for ceramics sintered body and its device |
| CN2938077Y (en) * | 2006-08-30 | 2007-08-22 | 河南省高远公路养护设备有限公司 | Instrument for testing interlayer adhesive strength of bituminous pavement |
| JP2007278779A (en) * | 2006-04-05 | 2007-10-25 | Shimadzu Corp | Test method for thermal fatigue, test piece for thermal fatigue test, and test piece mounting joint for thermal fatigue test |
| CN201302563Y (en) * | 2008-11-19 | 2009-09-02 | 无锡建仪仪器机械有限公司 | Novel cement mortar compression testing machine |
| CN102539245A (en) * | 2011-11-29 | 2012-07-04 | 河海大学 | Portable rapid testing device for strength of concrete test block |
| CN202964849U (en) * | 2012-12-11 | 2013-06-05 | 安徽理工大学 | Compacting deivce of concrete hollow slab forming machine |
| CN103217344A (en) * | 2013-03-19 | 2013-07-24 | 西安建筑科技大学 | On-site measuring device for concrete strength |
| CN203534896U (en) * | 2013-10-16 | 2014-04-09 | 长安大学 | Cam quantitative repeated loading device |
-
2013
- 2013-10-16 CN CN201310485481.5A patent/CN103528883A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09196837A (en) * | 1996-01-22 | 1997-07-31 | Nippon Steel Corp | Fatigue testing method provided with compound control system |
| JP2000097834A (en) * | 1998-09-18 | 2000-04-07 | Sintokogio Ltd | Heat-resisting fatigue test method for ceramics sintered body and its device |
| JP2007278779A (en) * | 2006-04-05 | 2007-10-25 | Shimadzu Corp | Test method for thermal fatigue, test piece for thermal fatigue test, and test piece mounting joint for thermal fatigue test |
| CN2938077Y (en) * | 2006-08-30 | 2007-08-22 | 河南省高远公路养护设备有限公司 | Instrument for testing interlayer adhesive strength of bituminous pavement |
| CN201302563Y (en) * | 2008-11-19 | 2009-09-02 | 无锡建仪仪器机械有限公司 | Novel cement mortar compression testing machine |
| CN102539245A (en) * | 2011-11-29 | 2012-07-04 | 河海大学 | Portable rapid testing device for strength of concrete test block |
| CN202964849U (en) * | 2012-12-11 | 2013-06-05 | 安徽理工大学 | Compacting deivce of concrete hollow slab forming machine |
| CN103217344A (en) * | 2013-03-19 | 2013-07-24 | 西安建筑科技大学 | On-site measuring device for concrete strength |
| CN203534896U (en) * | 2013-10-16 | 2014-04-09 | 长安大学 | Cam quantitative repeated loading device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801727A (en) * | 2018-05-08 | 2018-11-13 | 华侨大学 | Rock soil test piece compaction apparatus |
| CN112782012A (en) * | 2021-02-25 | 2021-05-11 | 江苏新宏大集团有限公司 | Repeated automatic detection device and detection method |
| CN113640157A (en) * | 2021-08-24 | 2021-11-12 | 西南交通大学 | High-frequency loading device suitable for concrete |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140122 |