CN104819814A - Amplitude adjustable crank slider controlled excitation mechanism - Google Patents
Amplitude adjustable crank slider controlled excitation mechanism Download PDFInfo
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- CN104819814A CN104819814A CN201410043855.2A CN201410043855A CN104819814A CN 104819814 A CN104819814 A CN 104819814A CN 201410043855 A CN201410043855 A CN 201410043855A CN 104819814 A CN104819814 A CN 104819814A
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- connecting rod
- controlled motor
- revolute pair
- displacement sensor
- angular displacement
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Abstract
The invention relates to an amplitude adjustable crank slider controlled excitation mechanism which is formed by a first connecting rod, a second connecting rod, a third connecting rod, a first controlled motor, a second controlled motor, a slider bracket, a coupler, a first double-cross universal coupler, a connection rod, a second double-cross universal coupler, a vibration output shaft, a first angular displacement sensor, a second angular displacement sensor, a first rotation pair, a second rotation pair, a third rotation pair, a fourth rotation pair, a guide sleeve cylinder, a fixed bracket, and a base. The length of the first connecting rod is equal to that of the third connecting rod. The slider bracket is connected to the vibration output shaft in a rigid way. The vibration output shaft does linear reciprocating excitation movement along the guide sleeve cylinder. According to the amplitude adjustable crank slider controlled excitation mechanism, the problem that amplitude real-time online continuous adjustment can not be realized by a mechanical exciter is solved, compared with an electromagnetic exciter and a hydraulic exciter, real-time online continuous adjustment and composite frequency vibration output functions are realized with low cost, and the amplitude adjustable crank slider controlled excitation mechanism is convenient to use.
Description
Technical field:
The present invention relates to the controlled exciting agency of a kind of width-adjustable crank block, belong to vibration test technical field.
Background technology:
Mechanical type vibrator has the advantage that equipment is simple, price is low, easy to use, and most eccentric stiffener, slider-crank mechanism and cam mechanism etc. of adopting are as exciting agency.The amplitude adjustment of eccentricity excitation mechanism needs to change excited frequency simultaneously, cannot carry out amplitude adjustment when being applied to vibration test when keeping excited frequency constant; Slider-crank mechanism and cam mechanism exciting agency then exist when carrying out vibration test that excited frequency is single, the adjustment of exciting amplitude needs shut down and can not carry out adjusting etc. problem by real-time online, and therefore mechanical type vibrator cannot realize the real-time online continuous setup of exciting amplitude and many excited frequencies compound vibration exports; Simple exciter test can only be applied to.Electromagnetic actuator is by inputting magnet coil by the electric current of mechanical periodicity, the exciting force of mechanical periodicity is being produced between sharp part and electromagnet, can arbitrarily control excited frequency and amplitude, waveform distortion is little, but carry out large amplitude, large exciting force test difficulty is large, the equipment needed is huge, and cost is high; Fluid pressure type vibrator is more satisfactory in performance, easily realize low frequency, large amplitude, greatly exciting force exciting export and adjustment is easy, but existence manufacture is high with maintenance cost, utility appliance large, use the problems such as inconvenience, leakage of oil.Controlled mechanism can realize the flexible exercise performance and the power performance that export, improve mechanism, mainly contain the types such as adjustable mechanism, Variable-input-speed mechanism and hybrid drive, Path Generation, kinematic synthesis, Function Synthesis and multitask output etc. can be realized, but also not can be used for the controlled exciting agency of mechanical type vibrator at present.Thus there is the cost controlled exciting agency of mechanical type that is low, easy to use, that be convenient to realize amplitude real-time online continuously adjustabe and compound vibration output to play an important role in vibration test.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of mechanical type vibrator that can realize amplitude real-time online continuously adjustabe and compound vibration output.The present invention solves the problems of the technologies described above by the following technical solutions: the controlled exciting agency of a kind of width-adjustable crank block, is made up of first connecting rod, second connecting rod, third connecting rod, the first controlled motor, the second controlled motor, slider bracket, shaft coupling, the first double-cross joint universal coupling, connecting link, the second double-cross joint universal coupling, vibration output shaft, the first angular displacement sensor, the second angular displacement sensor, the first revolute pair, the second revolute pair, the 3rd revolute pair, the 4th revolute pair, pilot sleeve, fixed support, base, first controlled motor and the second controlled motor are stepper motor or servomotor, first connecting rod one end is by the first revolute pair, shaft coupling is connected with the first controlled motor, driven by the first controlled motor, the other end of first connecting rod is connected with second connecting rod one end by the second revolute pair, the second connecting rod other end is connected with third connecting rod one end by the 3rd revolute pair, the third connecting rod other end is by the 4th revolute pair, first double-cross joint universal coupling, connecting link and the second double-cross joint universal coupling are connected with the second controlled motor, driven by the second controlled motor, first connecting rod is equal with the length of third connecting rod, slider bracket and vibration output shaft are for being rigidly connected, vibration output shaft does linear reciprocation shock motion along pilot sleeve, first angular displacement sensor and the second angular displacement sensor are connected with the 4th revolute pair with the first revolute pair respectively.
The corner displacement of first connecting rod and third connecting rod is measured by the first angular displacement sensor and the second angular displacement sensor, control module MPU is single-chip microcomputer, controls by control module MPU rotating speed and the phasing degree that the first controlled motor and the second controlled motor adjust first connecting rod and third connecting rod.
Outstanding advantages of the present invention is:
1, the four-bar mechanism of routine is converted into novel two-freedom crank block exciting agency by adopting the structural design of slider bracket, vibration output shaft and pilot sleeve to achieve by the present invention.
2, control by control module MPU the vibration that the first controlled motor and the second controlled motor adjust the real-time online continuously adjustabe and combination frequency that the rotating speed of first connecting rod and third connecting rod and phasing degree achieve the crank block exciting agency amplitude of mechanical two-degree-of-freedom to export; Solve mechanical type vibrator and cannot realize the continuously adjustable difficult problem of amplitude real-time online.
3, by the connected mode of the first double-cross joint universal coupling, connecting link and the second double-cross joint universal coupling, the hinge axis solving the 4th revolute pair follow slider bracket and vibration output shaft along pilot sleeve do larger axis that straight reciprocating motion produces to radial displacement problem.
4, compared with electromagnetic type and fluid pressure type vibrator, real-time online continuously adjustabe is achieved in low cost mode and combination frequency vibrates output function, easy to use.
Accompanying drawing explanation
Fig. 1: the structural representation of the controlled exciting agency of a kind of width-adjustable crank block.
Fig. 2: the mechanism principle figure of the controlled exciting agency of a kind of width-adjustable crank block.
Fig. 3: the fundamental diagram of the controlled exciting agency of a kind of width-adjustable crank block.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
The controlled exciting agency of a kind of width-adjustable crank block of the present invention, by first connecting rod (1), second connecting rod (2), third connecting rod (3), first controlled motor (4), second controlled motor (5), slider bracket (6), shaft coupling (7), first double-cross joint universal coupling (8), connecting link (17), second double-cross joint universal coupling (9), vibration output shaft (10), first angular displacement sensor (11), second angular displacement sensor (12), first revolute pair (13), second revolute pair (14), 3rd revolute pair (15), 4th revolute pair (16), pilot sleeve (18), fixed support (19), base (20) forms, first controlled motor (4) and the second controlled motor (5) are stepper motor or servomotor, first connecting rod (1) one end is by the first revolute pair (13), shaft coupling (7) is connected with the first controlled motor (4), driven by the first controlled motor (4), the other end of first connecting rod (1) is connected with second connecting rod (2) one end by the second revolute pair (14), second connecting rod (2) other end is connected with third connecting rod (3) one end by the 3rd revolute pair (15), third connecting rod (3) other end is by the 4th revolute pair (16), first double-cross joint universal coupling (8), connecting link (17) and the second double-cross joint universal coupling (9) are connected with the second controlled motor (5), driven by the second controlled motor (5), first connecting rod (1) is equal with the length of third connecting rod (3), slider bracket (6) and vibration output shaft (10) are for being rigidly connected, vibration output shaft (10) does linear reciprocation shock motion along pilot sleeve (18), first angular displacement sensor (11) and the second angular displacement sensor (12) are connected with the 4th revolute pair (16) with the first revolute pair (13) respectively.The corner displacement of first connecting rod (1) and third connecting rod (3) is measured by the first angular displacement sensor (11) and the second angular displacement sensor (12), control module MPU is single-chip microcomputer, controls by control module MPU rotating speed and the phasing degree that the first controlled motor (4) and the second controlled motor (5) adjust first connecting rod (1) and third connecting rod (3).
Contrast Fig. 1, Fig. 3, described first controlled motor (4) and the second controlled motor (5) are stepper motor or servomotor, MPU controls the first controlled motor (4) and the second controlled motor (5) respectively, first controlled motor (4) and the second controlled motor (5) drive first connecting rod (1) and third connecting rod (3) respectively, therefore the rotating speed of first connecting rod (1) and third connecting rod (3) and phase place can be controlled by MPU respectively, first angular displacement sensor (11) and the second angular displacement sensor (12) are connected with the 4th revolute pair (16) with the first revolute pair (13) respectively, to the corner displacement a1 of first connecting rod (1) and third connecting rod (3), a2 carries out measuring and sending into MPU.
Contrast Fig. 2, if the length AB of first connecting rod (1) is a, the length BC of second connecting rod (2) is b, and the length CD of third connecting rod (3) is a, the phase difference=a between first connecting rod (1) and third connecting rod (3)
1-a
2, described slider bracket (6) vibration exports X
dfor:
According to the measurement of corner displacement a1, the a2 to first connecting rod (1) and third connecting rod (3), control module MPU controls the rotational speed omega 1 and ω 2, slider bracket (6) the vibration output signal X that adjust first connecting rod (1) and third connecting rod (3) respectively
dfor the compound of first connecting rod (1) and third connecting rod (3) two frequency vibration signals exports; When MPU regulating and controlling first connecting rod (1) rotational speed omega 1 is equal with the rotational speed omega 2 of third connecting rod (3), the corner displacement that MPU controls the first controlled motor (4) and the second controlled motor (5) can change the size of phase difference, change the size of phase difference between first connecting rod (1) and third connecting rod (3), slider bracket (6) vibration output signal X
damplitude just change, slider bracket (6) vibration output signal X along with the change φ of phase differential
damplitude just can realize continuous non-stop-machine on-line tuning; When between first connecting rod (1) and third connecting rod (3), phase difference is 180 °, the vibration of slider bracket (6) exports as X
d=b-2asin ω
2t, its amplitude 2a are the twices of the single uncontrolled motor driving crank slide block exciting agency vibration output signal amplitude a of the routine of same size size, are the peak swing of slider bracket (6); When between first connecting rod (1) and third connecting rod (3), phase difference is 0 °, the vibration of slider bracket (6) exports as X
d=b, its amplitude is 0, is minimum amplitude; If phase difference consecutive variations between 0 °-360 °, then slider bracket (6) vibration output signal X between first connecting rod (1) and third connecting rod (3)
damplitude consecutive variations between peak swing 2a and minimum amplitude 0.
Contrast Fig. 1, the hinge axis of described 4th revolute pair (16) is followed slider bracket (6) and is done straight reciprocating motion with vibration output shaft (10) along pilot sleeve (18), can produce larger axis and radial displacement, therefore the hinge axis of the 4th revolute pair (16) need be connected by the first double-cross joint universal coupling (8), connecting link (17) and the second double-cross joint universal coupling (9) with the second controlled motor (5).
Claims (2)
1. the controlled exciting agency of width-adjustable crank block, is characterized in that being made up of first connecting rod, second connecting rod, third connecting rod, the first controlled motor, the second controlled motor, slider bracket, shaft coupling, the first double-cross joint universal coupling, connecting link, the second double-cross joint universal coupling, vibration output shaft, the first angular displacement sensor, the second angular displacement sensor, the first revolute pair, the second revolute pair, the 3rd revolute pair, the 4th revolute pair, pilot sleeve, fixed support, base, first controlled motor and the second controlled motor are stepper motor or servomotor, first connecting rod one end is by the first revolute pair, shaft coupling is connected with the first controlled motor, driven by the first controlled motor, the other end of first connecting rod is connected with second connecting rod one end by the second revolute pair, the second connecting rod other end is connected with third connecting rod one end by the 3rd revolute pair, the third connecting rod other end is by the 4th revolute pair, first double-cross joint universal coupling, connecting link and the second double-cross joint universal coupling are connected with the second controlled motor, driven by the second controlled motor, first connecting rod is equal with the length of third connecting rod, slider bracket and vibration output shaft are for being rigidly connected, vibration output shaft does linear reciprocation shock motion along pilot sleeve, first angular displacement sensor and the second angular displacement sensor are connected with the 4th revolute pair with the first revolute pair respectively.
2. the controlled exciting agency of a kind of width-adjustable crank block according to claim 1, it is characterized in that: the corner displacement of first connecting rod and third connecting rod is measured by the first angular displacement sensor and the second angular displacement sensor, control module MPU is single-chip microcomputer, controls by control module MPU rotating speed and the phasing degree that the first controlled motor and the second controlled motor adjust first connecting rod and third connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043855.2A CN104819814A (en) | 2014-01-30 | 2014-01-30 | Amplitude adjustable crank slider controlled excitation mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043855.2A CN104819814A (en) | 2014-01-30 | 2014-01-30 | Amplitude adjustable crank slider controlled excitation mechanism |
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| CN104819814A true CN104819814A (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410043855.2A Pending CN104819814A (en) | 2014-01-30 | 2014-01-30 | Amplitude adjustable crank slider controlled excitation mechanism |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241625A (en) * | 2015-11-18 | 2016-01-13 | 苏州苏试试验仪器股份有限公司 | Connector structure used for dual-table synchronous vibration |
| CN107870639A (en) * | 2016-09-28 | 2018-04-03 | 广西大学 | A kind of vibrator control software |
| CN107870073A (en) * | 2016-09-28 | 2018-04-03 | 广西大学 | A kind of mechanical exciting agency |
| CN109752201A (en) * | 2019-03-08 | 2019-05-14 | 东莞市诺丽电子科技有限公司 | A kind of pantograph simulation test equipment |
| CN110216248A (en) * | 2019-07-15 | 2019-09-10 | 燕山大学 | Continuous cast mold double source exciting device |
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| CN203688189U (en) * | 2014-01-30 | 2014-07-02 | 广西大学 | Amplitude-adjustable crank block controlled excitation mechanism |
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2014
- 2014-01-30 CN CN201410043855.2A patent/CN104819814A/en active Pending
Patent Citations (4)
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| JPH08184524A (en) * | 1994-12-28 | 1996-07-16 | Nissan Motor Co Ltd | Shaker for vehicle |
| CN2818897Y (en) * | 2005-08-16 | 2006-09-20 | 彭雪巍 | Dynamic transmission mechanism of vibrator of brick maker |
| CN102125910A (en) * | 2010-12-07 | 2011-07-20 | 南京工程学院 | Amplitude and energy adjustable mechanical random vibration exciting device |
| CN203688189U (en) * | 2014-01-30 | 2014-07-02 | 广西大学 | Amplitude-adjustable crank block controlled excitation mechanism |
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| 杨雍福: "无人值守型双曲柄板簧疲劳试验机设计", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241625A (en) * | 2015-11-18 | 2016-01-13 | 苏州苏试试验仪器股份有限公司 | Connector structure used for dual-table synchronous vibration |
| CN105241625B (en) * | 2015-11-18 | 2017-08-25 | 苏州苏试试验仪器股份有限公司 | Dual stage synchronous vibration connection header structure |
| CN107870639A (en) * | 2016-09-28 | 2018-04-03 | 广西大学 | A kind of vibrator control software |
| CN107870073A (en) * | 2016-09-28 | 2018-04-03 | 广西大学 | A kind of mechanical exciting agency |
| CN109752201A (en) * | 2019-03-08 | 2019-05-14 | 东莞市诺丽电子科技有限公司 | A kind of pantograph simulation test equipment |
| CN110216248A (en) * | 2019-07-15 | 2019-09-10 | 燕山大学 | Continuous cast mold double source exciting device |
| CN110216248B (en) * | 2019-07-15 | 2021-05-07 | 燕山大学 | Double-source vibration excitation device of continuous casting crystallizer |
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Application publication date: 20150805 |