CN114397053A - Linear drive motor push-pull force and stroke testing device - Google Patents
Linear drive motor push-pull force and stroke testing device Download PDFInfo
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- CN114397053A CN114397053A CN202210085819.7A CN202210085819A CN114397053A CN 114397053 A CN114397053 A CN 114397053A CN 202210085819 A CN202210085819 A CN 202210085819A CN 114397053 A CN114397053 A CN 114397053A
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 230000033001 locomotion Effects 0.000 claims abstract description 23
- 239000006247 magnetic powder Substances 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 24
- 238000013522 software testing Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
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- Chemical & Material Sciences (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a device for testing push-pull force and stroke of a linear driving motor, which comprises a testing platform, and a motor bracket, a guide shaft, a linear moving device and a load device which are arranged on the testing platform; the motor that will await measuring passes through guiding axle and linear movement device, set up load device simultaneously on linear movement device, the control unit control awaits measuring opening of motor stops, the load capacity of simultaneous control load device, the motor during operation acquires the stroke of motor through linear movement device, can acquire the load capacity of motor simultaneously, this testing arrangement simple structure, and is easy and simple to handle, promote efficiency of software testing, make the record informationization that detects, through the security that automatic measurement promoted the test greatly, tester's personal safety has been guaranteed.
Description
Technical Field
The invention relates to the technical field of motor detection equipment, in particular to a device for testing push-pull force and stroke of a linear driving motor.
Background
The linear driving motor is mainly used in an electric control system with stroke control and push/pull reciprocating motion. The linear driving motor push/pull force and stroke determine the opening and closing of the valve, and the precision of the push/pull force and the stroke is particularly important. In the test of the push/pull force of the linear driving motor, the push/pull force of the linear driving motor is generally tested by adopting a weight hanging mode, and the stroke is tested by adopting a ruler, so that the test precision is not high, and the test error is large.
In order to improve the accuracy and reliability of the push-pull force and stroke test of the linear driving motor, it is necessary to develop a push-pull force and stroke test device for the linear driving device.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device for testing the push-pull force and the stroke of a linear driving motor, which improves the measurement efficiency and reduces the measurement error.
The invention is realized by the following technical scheme:
a testing device for push-pull force and travel of a linear driving motor comprises a testing platform, and a motor support, a guide shaft, a linear moving device and a load device which are arranged on the testing platform;
the motor support is used for fixing a motor to be tested, one end of the guide shaft is connected with an output shaft of the motor to be tested, the other end of the guide shaft is connected with the linear moving device, the load device is respectively connected with the control unit, and the control unit is used for controlling the working states of the motor to be tested and the load device and acquiring the linear stroke and the push-pull force of the motor to be tested.
Preferably, the linear moving device includes a sliding column, the sliding column is in sliding contact with the surface of the test platform, and one end of the sliding column is connected with the end of the guide shaft.
Preferably, the sliding column passes through the rolling device and installs on test platform's surface, and the rolling device includes the roller that a plurality of intervals set up, and the sliding column is located the top of roller, and the both sides of rolling device are provided with the limiting plate.
Preferably, a displacement measuring device is arranged on the linear moving device and connected with the control unit.
Preferably, the load device comprises a magnetic powder brake, a load transfer device and a pressure sensor, the output end of the magnetic powder brake is connected with the load transfer device, the load transfer device is connected with the sliding column, and the guide shaft is connected with the sliding shaft through the pressure sensor.
Preferably, the load transfer device comprises a gear and a rack, the gear is fixedly connected to an output shaft of the magnetic powder brake, and the rack is arranged on the sliding column along the moving direction and meshed with the gear.
Preferably, the pressure sensor is a tension and compression sensor, and the tension and compression sensor is connected with the control unit.
Preferably, a linear motion system support is arranged on the test platform, and the guide shaft is installed in a guide hole of the linear motion system support.
Preferably, two ends of the linear moving device are provided with limit switches for controlling the moving distance of the sliding column.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the testing device provided by the invention, the motor to be tested passes through the guide shaft and the linear moving device, the load device is arranged on the linear moving device, the control unit controls the starting and stopping of the motor to be tested and controls the load capacity of the load device, the stroke of the motor is obtained through the linear moving device when the motor works, and the load capacity of the motor can be obtained at the same time.
Furthermore, the sliding column is connected with the surface of the test platform in a sliding mode, sliding friction between the sliding column and the platform is changed into rolling friction during stroke test, sliding friction resistance is reduced, the influence on load is reduced, and the measuring progress is improved.
Further, the load generated by the magnetic powder brake is transmitted to the sliding column through the load transmission device, so that the coupling of load measurement and stroke measurement is realized, the measurement of the stroke of the linear motor under different loads is realized, the safety problem caused by the load application by increasing or decreasing the weight in the past is solved, and the measurement efficiency is improved.
Furthermore, load transmission is carried out through a gear rack mechanism, load transmission under the working of the linear motor is achieved, and stable output of the load is guaranteed.
Furthermore, limit switches are arranged at two ends of the linear moving device to limit the stroke of the linear moving device, so that the measurement of the maximum load of the linear driving motor under the set linear speed is realized.
Drawings
FIG. 1 is a structural diagram of a device for testing push-pull force and stroke of a linear driving motor according to the present invention
FIG. 2 is a schematic structural diagram of a loading device according to the present invention;
FIG. 3 is a plan view of a data input of the test control terminal according to the present invention.
In the figure: 1. a test platform; 2. a motor bracket; 3. a motor to be tested; 4. a guide shaft; 5. a first connector; 6. a linear motion system support; 7. a second connector; 8. a pressure sensor; 9. a grating scale; 10. a third connector; 11. a gear; 12. a rack; 13. a load transfer device; 14. a magnetic powder brake.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
The linear driving motor is a driving motor that directly converts electric energy into linear motion mechanical energy without any intermediate conversion mechanism. Linear motors are also known as linear motors, push rod motors. The most common types of linear motors are flat and U-slot and tubular. The coil is typically composed of three phases, and brushless commutation is achieved by hall elements.
The linear motor does not need to pass through an intermediate conversion mechanism to directly generate linear motion, so that the motor structure is greatly simplified, the motion inertia is reduced, the dynamic response performance and the positioning precision are greatly improved, meanwhile, the reliability is also improved, the cost is saved, and the manufacture and the maintenance are simpler and more convenient. The linear motor is suitable for high-speed linear motion. Common materials can also achieve higher speeds because there is no constraint by centrifugal force. The selection specification of the linear motor is mainly the selection of the thrust, and software is usually used as an auxiliary tool. In order to accurately select the thrust of the linear motor, the load weight, the effective stroke, the maximum speed and the maximum acceleration need to be known, so that the accuracy of the load and the stroke is an important model selection parameter of the linear motor, and the invention aims to accurately measure the linear stroke and load data.
Referring to fig. 1-3, a device for testing push-pull force and stroke of a linear driving motor includes a testing platform 1, and a motor support 2, a guide shaft 4, a linear moving device and a load device disposed thereon.
The motor support 2 is used for fixing the motor 3 to be tested, enabling an output shaft of the motor 3 to be tested to be in a horizontal state, connecting the output shaft of the motor 3 to be tested with one end of the guide shaft 4, connecting the other end of the guide shaft 4 with the linear moving device, connecting the load device with the linear moving device, respectively connecting the linear moving device and the load device with the control unit, and controlling the working states of the motor to be tested and the load device by the control unit and obtaining the linear stroke and the push-pull force of the motor to be tested.
This testing arrangement passes through guiding shaft and linear movement device with the motor that awaits measuring, set up load device simultaneously on linear movement device, the start-stop of the motor that the control unit control awaits measuring opens, the load capacity of simultaneous control load device, the motor during operation acquires the stroke of motor through linear movement device, can acquire the load capacity of motor simultaneously, this testing arrangement simple structure, and is easy and simple to handle, promote efficiency of software testing, make the record informationization that detects, through the security that the automatic measurement promoted the test greatly, tester's personal safety has been guaranteed.
The linear moving device comprises a sliding column, the sliding column is connected with the surface of the test platform in a sliding mode, one end of the sliding column is connected with the end portion of the guide shaft 4, the linear motor works during testing, an output shaft of the linear motor linearly reciprocates, the sliding column is driven to move along the surface of the test platform, and the stroke of the linear motor can be determined by measuring the moving distance of the sliding column.
The slip post passes through rolling device and installs the surface at test platform, the slip post removes along rolling device's surface, greatly reduced frictional force, measurement accuracy has been improved, rolling device includes the roll thick stick that a plurality of intervals set up, the axial that rolls the thick stick is perpendicular with the moving direction, the slip post is located the top of rolling the thick stick, rolling device's both sides are provided with the limiting plate, a mobile location for to the slip post, when the slip post removes, roll thick stick circumferential rotation, consequently, become the sliding friction of slip post and roll, greatly reduced the resistance when the slip post removes.
The tip of slip post passes through the end connection of third spliced pole 10 with the guide shaft, is provided with displacement measurement device on the third spliced pole 10, and displacement measurement device is connected with the control unit, and the control unit acquires displacement measurement device's measured data, realizes automatic measurement, and artifical measuring tape measurement mode in the past has improved measurement of efficiency, has more improved measurement accuracy.
The displacement measuring device is a grating ruler displacement sensor 9, and a transmission grating ruler and a reflection grating ruler can be adopted. The grating scale displacement sensor 9 is a measurement feedback device that works by using the optical principle of a grating, and is used for detecting linear displacement or angular displacement. The signal output by the sensor is digital pulse, and the sensor has the characteristics of large detection range, high detection precision and high response speed. The displacement sensor of the grating ruler consists of two parts, namely a ruler grating and a grating reading head, wherein the ruler grating is generally fixed on a movable part, and the grating reading head is arranged on a fixed part. In this embodiment, the scale grating is arranged along the direction of movement of the sliding column and the grating readhead is mounted on the third connector 10.
The load device comprises a magnetic powder brake 14, a load transfer device 13 and a pressure sensor, the load transfer device is a gear and rack mechanism, the gear and rack mechanism serves as the load transfer mechanism, a load generated by the magnetic powder brake 14 is applied to the sliding column, the load is adjusted while the stroke is measured, the pressure sensor is arranged between the third connector 10 and the guide shaft 4, the second connector 7 is arranged at the end part of the guide shaft 4, and the second connector 7 is connected with the third connector 10 through the pressure sensor 8.
The magnetic powder brake is formed by combining a transmission unit (input shaft) and a driven unit (output shaft). In the space between the unit cells, granular magnetic powder is filled. When the magnetic coil is not electrically conducted, torque is not transmitted from the transmission shaft to the driven shaft, but when the coil is electromagnetically electrified, magnetic powder is attracted by the action of magnetic force to generate a hardening phenomenon, and the torque is transmitted between continuous sliding. The magnetic powder brake is an automatic control element with excellent performance. The magnetic powder is used as a working medium, and the exciting current is used as a control means, so that the aim of controlling braking or torque transmission is fulfilled. The output torque and the exciting powder current have good linear relation and are irrelevant to the rotating speed or slip, and the device has the advantages of high response speed and simple structure.
The gear-rack mechanism comprises a gear 11 and a rack 12, the gear is fixedly connected to an output shaft of the magnetic powder brake 14, the rack 12 is arranged on the top surface of the sliding column along the stroke moving direction and meshed with the gear 11, and torque output by the magnetic powder brake 14 is transmitted to the sliding column through the gear-rack mechanism to couple a load with the sliding column.
The pressure sensor is a tension and compression sensor, is called a resistance strain sensor, belongs to the series of weighing sensors, and can convert physical signals into measurable electric signals to be output. The tension and compression sensor is connected with the control unit, the tension and compression sensor takes an elastic body as a medium, the resistance value of the tension and compression sensor is changed by the resistance stress sheets acting on two sides of the tension and compression sensor through force, and the tension and compression sensor is converted into an electric signal through a corresponding circuit to realize measurement of tension and compression.
In this embodiment, a U-shaped pulling pressure sensor is preferred, and the U-shaped pulling pressure sensor has the advantages of compact structure, convenience in installation, high measurement precision and strong anti-deflection capability.
Further, in order to guarantee the power transmission stability of the guide shaft, the test platform is provided with a linear motion system support 6, the middle of the guide shaft is installed in a guide hole of the linear motion system support, the end of the guide shaft is connected with a motor to be tested through a first connecting head 5, and the circumferential vibration in the test process is reduced through the support of the system support, so that the measurement precision is improved.
The control unit comprises a display end and an industrial personal computer, information such as ambient temperature, ambient humidity, test time, the model of the motor to be tested, the motor number and testers is arranged on the display end, a detection surface is conveniently issued at the later stage, and then a push-pull force value display frame and a stroke display frame are further arranged.
The following describes in detail the testing method of the device for testing push-pull force and stroke of the linear driving motor provided by the invention, the testing method is divided into two types, specifically as follows:
method for testing maximum stroke of linear driving motor under each load
The method comprises the steps that a motor to be tested is installed on a motor support and connected with a guide shaft, a push-pull force value is input at a display end, the motor to be tested is controlled to work through an industrial personal computer, meanwhile, the industrial personal computer applies current to a magnetic powder brake according to a required load through a programmable power supply, the motor to be tested linearly reciprocates, pull-pressure data are obtained through a pull-pressure sensor, the linear stroke of the motor is obtained through a grating ruler, the maximum stroke of the motor to be tested under a set load is obtained, data of the whole testing device are automatically collected, recorded and stored through the industrial personal computer, and finally a report is formed and printed.
Second, maximum load test method of linear driving motor under set linear speed
The two ends of the sliding column are respectively provided with a limit switch, the limit switches are connected with the test platform and connected with the control unit, the sliding column performs reciprocating motion between the two limit switches, when one end of the sliding column triggers the first limit switch, the output shaft of the linear motor performs reverse motion, when the other end of the sliding column triggers the second limit switch, the output shaft of the linear motor performs reverse motion again, and the linear motor performs reciprocating linear motion within the distance.
The push-pull force value is input at the display end, the work of the motor to be tested is controlled through the industrial personal computer, meanwhile, the industrial personal computer applies current to the magnetic powder brake according to the required load through the program control power supply, the motor to be tested linearly reciprocates, the control unit calculates the linear velocity of each stroke according to the trigger time of the two limit switches, when the linear velocities of the strokes are unequal, the push-pull force value is modified, the linear velocity is measured again until the linear velocity of each stroke is the same, and the maximum load of the linear driving motor under the set linear velocity is obtained.
This linear drive motor push-pull power and stroke testing arrangement can treat the motor of surveying the stroke under different loads and carry out the accuracy measurement, can shorten test cycle greatly, reduces the product defective rate, through automatic measurement, reduces the cost of labor, reduces the operation cost, improves efficiency of software testing, promotes economic benefits, improves the security of measurement simultaneously.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A testing device for push-pull force and travel of a linear driving motor is characterized by comprising a testing platform (1), a motor support (2), a guide shaft (4), a linear moving device and a load device, wherein the motor support, the guide shaft (4), the linear moving device and the load device are arranged on the testing platform;
the motor support (2) is used for fixing a motor (3) to be tested, one end of the guide shaft (4) is connected with an output shaft of the motor (3) to be tested, the other end of the guide shaft (4) is connected with the linear moving device, the load device is connected with the control unit respectively, and the control unit is used for controlling the working states of the motor to be tested and the load device and acquiring the linear stroke and the push-pull force of the motor to be tested.
2. The device for testing the push-pull force and the stroke of a linear driving motor according to claim 1, wherein the linear moving device comprises a sliding column which is in sliding contact with the surface of the test platform, and one end of the sliding column is connected with the end of the guide shaft (4).
3. The device for testing the push-pull force and the stroke of the linear driving motor as claimed in claim 2, wherein the sliding column is mounted on the surface of the testing platform through a rolling device, the rolling device comprises a plurality of rolling bars arranged at intervals, the sliding column is located at the tops of the rolling bars, and limiting plates are arranged on two sides of the rolling device.
4. The device for testing the push-pull force and the stroke of a linear driving motor as claimed in claim 1, wherein the linear moving device is provided with a displacement measuring device, and the displacement measuring device is connected with the control unit.
5. The testing device for the push-pull force and the stroke of the linear driving motor according to claim 2, wherein the load device comprises a magnetic powder brake (14), a load transfer device (13) and a pressure sensor, the output end of the magnetic powder brake (14) is connected with the load transfer device (13), the load transfer device (13) is connected with the sliding column, and the guide shaft is connected with the sliding shaft through the pressure sensor (8).
6. The testing device for push-pull force and stroke of the linear driving motor according to claim 5, wherein the load transmission device comprises a gear (11) and a rack (12), the gear is fixedly connected to an output shaft of the magnetic powder brake (14), and the rack (12) is arranged on the sliding column along the moving direction and meshed with the gear (11).
7. The device for testing the push-pull force and the stroke of the linear driving motor as claimed in claim 5, wherein the pressure sensor is a pull-press sensor, and the pull-press sensor is connected with the control unit.
8. The device for testing the push-pull force and the stroke of the linear driving motor according to claim 1, wherein the test platform is provided with a linear motion system support (6), and the guide shaft is arranged in a guide hole of the linear motion system support.
9. The device for testing the push-pull force and the stroke of a linear driving motor as claimed in claim 1, wherein limit switches are disposed at two ends of the linear moving device for controlling the moving distance of the sliding column.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210085819.7A CN114397053A (en) | 2022-01-25 | 2022-01-25 | Linear drive motor push-pull force and stroke testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210085819.7A CN114397053A (en) | 2022-01-25 | 2022-01-25 | Linear drive motor push-pull force and stroke testing device |
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| CN114397053A true CN114397053A (en) | 2022-04-26 |
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| CN202210085819.7A Pending CN114397053A (en) | 2022-01-25 | 2022-01-25 | Linear drive motor push-pull force and stroke testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115236510A (en) * | 2022-09-21 | 2022-10-25 | 西北工业大学 | Linear electric motor performance test bench |
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