CN104792625A - Digital control precision loading mechanism - Google Patents
Digital control precision loading mechanism Download PDFInfo
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- CN104792625A CN104792625A CN201510226560.3A CN201510226560A CN104792625A CN 104792625 A CN104792625 A CN 104792625A CN 201510226560 A CN201510226560 A CN 201510226560A CN 104792625 A CN104792625 A CN 104792625A
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- screw pair
- gear train
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- groups
- motor
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Abstract
The invention discloses a digital control precision loading mechanism, belongs to the fields of mechanical testing techniques and mechanical experiments, and aims at solving the problem of precise quantitative loading of experiment materials. According to the technical main points, the digital control precision loading mechanism comprises a controller, an electric motor, a transmission mechanism, a screw pair transmission mechanism and a spring group executing mechanism, wherein the electric motor is used for driving a driving part of the screw pair transmission mechanism to rotate through mechanical transmission, so that a driven part of the screw pair transmission mechanism carries out axial movement; the axial movement principle of the driven part of the screw pair transmission mechanism is determined by programming of the controller and corresponding control on the movement of the electric motor; the spring group executing mechanism is capable of compressing or stretching a spring group due to the axial movement; the compression amount or the stretching amount of the spring group is transformed into the loading amount, so as to dive the loaded object; and the loading amount, the loading speed and the accelerated speed of the loaded object are controlled according to the axial movement principle. The digital control precision loading mechanism has the beneficial effects that the digital control precision loading mechanism is high in control accuracy and can be applied to occasions with high repeat accuracy requirements.
Description
Technical field
The invention belongs to mechanical test technology and mechanical experiment field, a kind of digital control mechanism, especially a kind of control and test unit being applied to the machine automatization tests such as mechanical precision measurement, sensor precision calibration, material precision measurement and electromechanical integration experiment.
Background technology
Load maintainer is the common mechanism of mechanical test equipment, the motion of motor or hydraulic system can be converted to the loading campaign of expection by it, as long as suitably adopt suitable mechanism design can load tested material or sensor, tested object just can be made to obtain corresponding load.But general load maintainer also also exists significant limitation in actual applications: can not realize loading the precise quantitative of test material, obtain mechanics (machinery) characteristic of material; To the direct demarcation of sophisticated sensor, the calibration characteristic curve of sophisticated sensor can not be obtained, thus can not be applied in repeatable accuracy and require higher occasion.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of digital control accurate load maintainer, load with the precise quantitative realized test material carries out.
To achieve these goals, the technical solution used in the present invention is: a kind of digital control accurate load maintainer, comprise controller, motor, gear train, screw pair gear train and groups of springs topworks, motor drives the driving link of screw pair gear train to rotate through mechanical drive, the driven member of screw pair gear train is made to carry out axially-movable, the axially-movable rule of the driven member of screw pair gear train is programmed by controller and is carried out corresponding control to the motion of motor and determine, this axially-movable makes groups of springs topworks compress groups of springs or stretch, change the decrement of groups of springs or amount of tension into heap(ed) capacity, drive according to this and be loaded object, and control according to described axially-movable rule the heap(ed) capacity being loaded object, loading velocity and acceleration.
Further, the described heap(ed) capacity being loaded object is controlled by the anglec of rotation of motor, loading velocity is controlled by the angular velocity of rotation of motor, acceleration is controlled by the rotating angular acceleration of motor, to compression and decompression having rotated and reverse respectively by controller programming Control motor of object.
Further, when the displacement needing the driven member controlling screw pair gear train is △ X, the anglec of rotation of motor is by the equation of motion
determined, be now loaded the heap(ed) capacity of object by equation
determined;
Wherein:
△ X: the displacement of the driven member of screw pair gear train;
F: the heap(ed) capacity being loaded object;
: the anglec of rotation of motor;
: gear-driven ratio of gear;
T
0: the basic lead of screw pair gear train;
K
0: the stiffness coefficient of single spring in groups of springs;
N: the spring number in groups of springs.
Beneficial effect:
1. the present invention adopts digital control technology to make load maintainer have the controllable precise of heap(ed) capacity; Namely digital control load maintainer can have unlimited predetermined loading rule of planting material or sensor by changing programming data;
2. topworks of the present invention adopts screw pair gear train and groups of springs topworks, be power by the spring transitions that is displaced through of nut, testee is loaded, overcome the deficiencies such as the uncontrollability of the loading parameters of traditional load maintainer, control accuracy is high, can be applied in repeatable accuracy and require high occasion;
3., when needing the loading rule changing tested object, only need to change programming data, expand range of application and the dirigibility of load maintainer.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the digital control accurate load maintainer in embodiment 1;
Fig. 2 is the front view for the digital control accurate load maintainer of two-way stretch and compression scheme in embodiment 1;
Fig. 3 is the vertical view for the digital control accurate load maintainer of two-way stretch and compression scheme in embodiment 1;
Fig. 4 is the front view for the digital control accurate load maintainer of unilateral stretching scheme in embodiment 2;
Fig. 5 is the vertical view for the digital control accurate load maintainer of unilateral stretching scheme in embodiment 2;
Fig. 6 is the front view for the digital control accurate load maintainer of Uniaxial Compression scheme in embodiment 3;
Fig. 7 is the vertical view for the digital control accurate load maintainer of Uniaxial Compression scheme in embodiment 3.
Wherein: 1. controller, 2. motor, 3. gear train, 4. screw pair gear train, the driving link of 401. screw pair gear trains, the driven member of 402. screw pair gear trains, 5. groups of springs topworks, 501. groups of springs, 6. back up pad, 7. pull bar, be 8. loaded object, 9. driver.
Embodiment
In order to explain the invention further, below in conjunction with drawings and the specific embodiments, the present invention is illustrated.
Embodiment 1:
Present embodiments provide and a kind of two-wayly draw/laminated structure scheme, digital control accurate load maintainer in the present embodiment, as Figure 1-3, it comprises controller 1, motor 2, gear train 3, screw pair gear train 4 and groups of springs topworks 5, screw pair gear train 4 in the present embodiment can be common sliding screw/pair of nut, also can be ball screw/pair of nut, motor 2 and screw pair gear train 4 to be installed in back up pad 6 and to be positioned at the same side of back up pad 6, and this kind of structure makes the axial dimension compact conformation of accurate load maintainer.
Motor 2 drives the driving link 401 of screw pair gear train to rotate through gear train 3, concrete, gear train can be any one in gear drive, worm gear/worm drive, Synchronous Belt Drives or shaft coupling transmission, and the driving link 401 of screw pair gear train is screw mandrel.
The driving link 401 of screw pair gear train rotates and makes the driven member 402 of screw pair gear train carry out axially-movable, and concrete, the driven member of screw pair gear train is nut.
The axially-movable rule of the driven member 402 of screw pair gear train is programmed by controller 1 and carries out corresponding control to the motion of motor 2 and determine, motor 2 by the driver 9 controlled by controller 1 drive, this axially-movable makes groups of springs topworks 5 pairs of groups of springs 501 compress or stretch, change the decrement of groups of springs 501 or amount of tension into heap(ed) capacity, drive according to this and be loaded object 8, and control according to described axially-movable rule the heap(ed) capacity being loaded object 8, loading velocity and acceleration, described groups of springs comprises compression spring set and extension spring group,
Concrete, in the present embodiment, groups of springs topworks 5 adopts slide plate, as shown in Figure 2, installs compression spring set respectively in the left and right sides of slide plate, or installs extension spring group respectively in the left and right sides of nut; Nut is made to drive slide plate compress groups of springs or stretch, (such as, when the transverse movement left of gear train drive nut, groups of springs on the left of slide plate compression nut), by groups of springs, the displacement of nut is converted to pulling force or pressure, this pulling force or pressure act on through pull bar 7 and are loaded object 8, complete the predetermined loading to being loaded object 8.The object that is loaded in the present embodiment is sensor, also can be material.
In the present embodiment, the heap(ed) capacity being loaded object 8 is controlled by the anglec of rotation of motor 2, loading velocity is controlled by the angular velocity of rotation of motor 2, acceleration is controlled by the rotating angular acceleration of motor 2, to compression and decompression having rotated and reverse respectively by controller 1 programming Control motor 2 of object.
When the displacement of the driven member 402 of screw pair gear train is set as △ X, the anglec of rotation of motor is by the equation of motion
determined, be now loaded the heap(ed) capacity of object 8 by equation
determined;
Wherein:
△ X: the displacement of the driven member of screw pair gear train, the i.e. deflection of groups of springs;
F: the heap(ed) capacity being loaded object;
: the anglec of rotation of motor;
: gear-driven ratio of gear;
T
0: the basic lead of screw pair gear train;
K
0: the stiffness coefficient of single spring in groups of springs;
N: the spring number in groups of springs;
Embodiment 2:
The present embodiment provides a kind of unilateral stretching organization plan: as illustrated in figures 4-5, and the difference of itself and embodiment 1 is: install compression spring set in one-sided (left side) of nut.Or on one-sided (right side) of nut, extension spring group is installed.
Embodiment 3:
The present embodiment provides a kind of Uniaxial Compression organization plan: as shown in fig. 6-7, and the difference of itself and embodiment 1 is: install compression spring set on one-sided (right side) of nut.Or in one-sided (left side) of nut, extension spring group is installed.
Claims (6)
1. a digital control accurate load maintainer, it is characterized in that: comprise controller, motor, gear train, screw pair gear train and groups of springs topworks, motor drives the driving link of screw pair gear train to rotate through mechanical drive, the driven member of screw pair gear train is made to carry out axially-movable, the axially-movable rule of the driven member of screw pair gear train is programmed by controller and is carried out corresponding control to the motion of motor and determine, this axially-movable makes groups of springs topworks compress groups of springs or stretch, change the decrement of groups of springs or amount of tension into heap(ed) capacity, drive according to this and be loaded object, and control according to described axially-movable rule the heap(ed) capacity being loaded object, loading velocity and acceleration.
2. digital control accurate load maintainer as claimed in claim 1, it is characterized in that: the described heap(ed) capacity being loaded object is controlled by the anglec of rotation of motor, loading velocity is controlled by the angular velocity of rotation of motor, acceleration is controlled by the rotating angular acceleration of motor, to compression and decompression having rotated and reverse respectively by controller programming Control motor of object.
3. digital control accurate load maintainer as claimed in claim 2, is characterized in that: when the displacement needing the driven member controlling screw pair gear train is △ X, the anglec of rotation of motor is by the equation of motion
determined, be now loaded the heap(ed) capacity of object by equation
determined;
Wherein:
△ X: the displacement of the driven member of screw pair gear train;
F: the heap(ed) capacity being loaded object;
the anglec of rotation of motor;
gear-driven ratio of gear;
T
0: the basic lead of screw pair gear train;
K
0: the stiffness coefficient of single spring in groups of springs;
N:; Spring number in groups of springs.
4. the digital control accurate load maintainer as described in any one of claim 1-3, is characterized in that: motor and screw pair gear train to be installed in back up pad and to be positioned at the same side of back up pad.
5. the digital control accurate load maintainer as described in any one of claim 1-3, it is characterized in that: respectively compression spring set is installed in the left and right sides of groups of springs topworks, or in the left and right sides of the driven member of screw pair gear train, extension spring group is installed respectively; The driven member of screw pair gear train is made to drive groups of springs topworks compress groups of springs or stretch, by compression spring set or extension spring group, the displacement of the driven member of screw pair gear train is converted to pulling force or pressure, this pulling force or pressure act on through pull bar and are loaded object, complete the predetermined loading to being loaded object, realize biaxial loadings, compression or stretching.
6. the digital control accurate load maintainer as described in any one of claim 1-3, is characterized in that: install compression spring set or extension spring group in the left side of the driven member of screw pair gear train or right both sides; The driven member of screw pair gear train is made to drive groups of springs topworks compress groups of springs or stretch, by compression spring set or extension spring group, the displacement of the driven member of screw pair gear train is converted to pulling force or pressure, this pulling force or pressure act on through pull bar and are loaded object, completing the predetermined loading to being loaded object, realizing Uniaxial Compression or stretching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226560.3A CN104792625A (en) | 2015-05-06 | 2015-05-06 | Digital control precision loading mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226560.3A CN104792625A (en) | 2015-05-06 | 2015-05-06 | Digital control precision loading mechanism |
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| CN104792625A true CN104792625A (en) | 2015-07-22 |
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| CN201510226560.3A Pending CN104792625A (en) | 2015-05-06 | 2015-05-06 | Digital control precision loading mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105415744A (en) * | 2015-12-25 | 2016-03-23 | 中国航空工业集团公司北京航空制造工程研究所 | Force output device with high resolution |
| CN110907285A (en) * | 2019-11-19 | 2020-03-24 | 中国航发北京航空材料研究院 | Miniature loading device for DVC method test |
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| WO2008002528A2 (en) * | 2006-06-27 | 2008-01-03 | Bfs Diversified Products, Llc | Method for monitoring a weight-sensing system for vehicles |
| CN102141792A (en) * | 2011-01-21 | 2011-08-03 | 大连民族学院 | Digital control cam mechanism and control method thereof |
| CN102866033A (en) * | 2012-10-22 | 2013-01-09 | 清华大学 | Dynamic loading device for two-way tension and pressure |
| CN103698116A (en) * | 2013-12-13 | 2014-04-02 | 西北工业大学 | Spring-loaded performance test experiment table for linear electro-mechanical actuator |
| CN103837339A (en) * | 2014-03-26 | 2014-06-04 | 中国工程物理研究院机械制造工艺研究所 | Dynamic driving system adopting servo force |
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2015
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Patent Citations (7)
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| JPS62174629A (en) * | 1986-01-28 | 1987-07-31 | Toyo Seikan Kaisha Ltd | Measuring instrument for lid opening force |
| WO2008002528A2 (en) * | 2006-06-27 | 2008-01-03 | Bfs Diversified Products, Llc | Method for monitoring a weight-sensing system for vehicles |
| WO2008002528A3 (en) * | 2006-06-27 | 2008-02-14 | Bfs Diversified Products Llc | Method for monitoring a weight-sensing system for vehicles |
| CN102141792A (en) * | 2011-01-21 | 2011-08-03 | 大连民族学院 | Digital control cam mechanism and control method thereof |
| CN102866033A (en) * | 2012-10-22 | 2013-01-09 | 清华大学 | Dynamic loading device for two-way tension and pressure |
| CN103698116A (en) * | 2013-12-13 | 2014-04-02 | 西北工业大学 | Spring-loaded performance test experiment table for linear electro-mechanical actuator |
| CN103837339A (en) * | 2014-03-26 | 2014-06-04 | 中国工程物理研究院机械制造工艺研究所 | Dynamic driving system adopting servo force |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105415744A (en) * | 2015-12-25 | 2016-03-23 | 中国航空工业集团公司北京航空制造工程研究所 | Force output device with high resolution |
| CN110907285A (en) * | 2019-11-19 | 2020-03-24 | 中国航发北京航空材料研究院 | Miniature loading device for DVC method test |
| CN110907285B (en) * | 2019-11-19 | 2022-08-23 | 中国航发北京航空材料研究院 | Miniature loading device for DVC method test |
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Application publication date: 20150722 |