Motor voltage testing device
By designing an automated motor voltage testing device, which utilizes a shaft-mounted rotation mechanism and an oscilloscope to automatically identify shaft voltage, the problem of low efficiency and poor consistency in manual testing of DC motors is solved, achieving efficient and low-cost batch testing and quality assurance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-03-31
AI Technical Summary
Current DC motor shaft voltage testing mainly relies on manual methods, which are inefficient, costly, and unsuitable for batch testing. Furthermore, the test results are easily affected by human factors, resulting in some unqualified motors not being detected, thus reducing test quality and consistency.
Design a motor voltage testing device, including a test chassis, a motor positioning fixture, a power connector, a shaft-clamping and rotating mechanism, and a voltage measuring instrument, to achieve automated testing. The shaft is clamped and rotated by the shaft-clamping and rotating mechanism, and the shaft voltage is collected by a voltage sensing line. An oscilloscope is used to automatically identify and prompt abnormalities.
It improves testing efficiency, reduces labor costs, is suitable for full inspection testing of batch motors, ensures test quality and consistency, reduces human error, and improves the quality of motors leaving the factory.
Smart Images
Figure CN121762897A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of motor voltage testing, and more specifically, to a motor voltage testing device. Background Technology
[0002] DC motors are typically driven using PWM (Pulse Width Modulation), which can cause a voltage difference between the inner and outer rings of the DC motor bearing, forming a shaft voltage. Additionally, a voltage difference can also occur across the two ends of the DC motor end cap. Excessive shaft voltage can drastically shorten the performance and lifespan of the DC motor bearings, leading to electro-corrosion.
[0003] Currently, the main method for testing the shaft voltage of DC motors is manual testing. This manual testing method has low testing efficiency and high cost, making it unsuitable for batch testing of DC motor shaft voltage. As a result, most existing batch testing of DC motor shaft voltage uses a sampling inspection method. This can lead to some motors with excessively high shaft voltages going undetected, reducing the quality of the DC motor shaft voltage test and the quality of the DC motors leaving the factory. Furthermore, manual testing is easily affected by the subjective factors of the testers, making it difficult to ensure the consistency of the DC motor shaft voltage test results. Summary of the Invention
[0004] The purpose of this application is to provide a motor voltage testing device that can automatically test the shaft voltage of the motor under test, improve testing efficiency, greatly reduce manual testing costs, and is very suitable for batch shaft voltage testing and full inspection testing of DC motors. This can improve the quality of DC motor shaft voltage testing and the factory quality of DC motors, and effectively ensure the consistency of DC motor shaft voltage testing results.
[0005] To achieve the above objectives, this application provides a motor voltage testing device, comprising: The test chassis is equipped with a motor positioning fixture, a power connector and a voltage measuring instrument. The motor positioning fixture is used to place the motor to be tested, and the power connector is used to connect to one end of the lead wire of the motor to be tested. A shaft-clamping and rotating mechanism is mounted on the test chassis and is used to clamp the shaft of the motor under test and drive the shaft of the motor under test to rotate; the voltage measuring instrument is connected to a voltage sensing line, which is connected to the shaft-clamping and rotating mechanism and is used to collect the shaft voltage of the motor under test.
[0006] In the implementation of the above technical solution, the motor under test can be placed on the motor positioning fixture of the test chassis, and one end of the lead wire of the motor under test can be connected to the power connector on the test chassis to supply power to the motor under test. During actual testing, the shaft of the motor under test is clamped by a shaft-holding rotation mechanism, causing the shaft to rotate. The shaft voltage of the motor under test is obtained using a voltage measuring instrument connected to the shaft-holding rotation mechanism, thus obtaining the test result of the shaft voltage of the motor under test. This allows determination of the shaft voltage of the motor under test. The device automatically tests the shaft voltage of motors after the tester places the motor under test on the motor positioning fixture and connects one end of the motor's lead wire to the power connector on the test chassis. This effectively improves testing efficiency, greatly reduces manual testing costs, and is very suitable for batch shaft voltage testing and full inspection of DC motors. This improves the quality of DC motor shaft voltage testing and the factory quality of DC motors, and effectively ensures the consistency of DC motor shaft voltage test results.
[0007] In a preferred embodiment of this application, the motor positioning fixture is a motor positioning ring, the size of which is adapted to the motor to be tested, and the motor positioning ring has a motor positioning ring opening.
[0008] In the implementation of the above technical solution, the motor positioning fixture adopts a motor positioning ring, which can reduce the complexity of the motor positioning fixture, facilitate the manufacturing and production of the motor positioning fixture, and the size of the motor positioning ring is adapted to the motor to be tested. The motor positioning ring forms a motor positioning ring opening, which is very suitable for the placement and positioning of the motor to be tested, and can have a good positioning effect on the motor to be tested.
[0009] In a preferred embodiment of this application, the test chassis is provided with a wire-pulling assembly at the location where the power connector is set. The wire-pulling assembly is used to pull out one end of the lead wire of the motor under test connected to the power connector.
[0010] In the implementation of the above technical solution, a wire-pulling component is provided at the location of the power connector on the test chassis. When the test is completed, the wire-pulling component can automatically pull out one end of the lead wire of the motor under test connected to the power connector, without the need for the test personnel to manually pull out one end of the lead wire of the motor under test. This facilitates the work of the test personnel and further improves the efficiency of shaft voltage testing of the motor under test.
[0011] In a preferred embodiment of this application, a latch is provided at one end of the lead wire of the motor under test connected to the energized connector; the wire pulling assembly includes a wire pulling drive cylinder and a pulling plate. The wire-pulling drive cylinder is installed in the test chamber. The working end of the wire-pulling drive cylinder is connected to the pull plate. The pull plate is used to release the latch so that one end of the lead wire of the motor to be tested is pulled out from the power connector.
[0012] In the implementation of the above technical solution, when the test is completed, the pulling plate can be moved upward by the working end of the pulling drive cylinder, and the pulling plate will act on the latch set at one end of the lead wire of the motor under test, so that the latch is released and one end of the lead wire of the motor under test is pulled out from the power connector; the setting of the latch, as well as the pulling drive cylinder and the pulling plate, can facilitate the pulling out of one end of the lead wire of the motor under test from the power connector, and ensure the pulling effect and the success rate of pulling out.
[0013] In a preferred embodiment of this application, the voltage measuring instrument is an oscilloscope, which is configured to provide an abnormality alert when the shaft voltage of the motor under test is greater than a preset shaft voltage threshold.
[0014] In the implementation of the above technical solution, an oscilloscope is used as the voltage measuring instrument. Oscilloscopes usually have the function of automatically identifying whether the voltage is too high. Therefore, the shaft voltage threshold can be preset on the oscilloscope. When the shaft voltage of the motor under test is greater than the preset shaft voltage threshold, the oscilloscope will provide an abnormal prompt without the need for the tester to observe and judge it. This can further improve the testing efficiency of the shaft voltage of the motor under test and reduce the possibility of misjudgment by the tester, thereby further improving the testing accuracy and test effect of the shaft voltage of the motor under test.
[0015] In a preferred embodiment of this application, the shaft-clamping rotation mechanism includes a shaft-clamping assembly and a rotation drive component. The shaft clamping assembly is mounted on the test chassis near the motor positioning fixture and is used to clamp the shaft of the motor to be tested. The rotary drive component is driven to the shaft clamping assembly and is used to drive the shaft clamping assembly to rotate, thereby driving the shaft of the motor under test to rotate.
[0016] In the implementation of the above technical solution, during actual testing, the shaft of the motor under test is clamped by the shaft clamping assembly, and the shaft clamping assembly is driven to rotate by the rotary drive component, thereby causing the clamped shaft of the motor under test to rotate. Through the setting and coordination of the shaft clamping assembly and the rotary drive component, the function of the shaft clamping and rotating mechanism can be well realized, so that the shaft of the motor under test can rotate, which is also beneficial for testing the shaft voltage of the motor under test.
[0017] In a preferred embodiment of this application, the shaft clamping assembly includes a mounting plate, a shaft clamping drive cylinder, an adjusting ring, and multiple shaft clamping blocks. The mounting plate is mounted on the test chassis; The working end of the shaft-driven cylinder is connected to the mounting plate; The adjusting ring is disposed on the mounting plate, and the output end of the rotary drive component passes through the mounting plate and is driven to connect with the adjusting ring. Multiple clamping shaft blocks are spliced together to form an inverted frustum shape and are disposed in the adjusting ring, and the multiple clamping shaft blocks form a clamping shaft hole.
[0018] In the implementation of the above technical solution, the mounting plate can move upward under the action of the shaft-clamping drive cylinder, thereby driving the adjusting ring to tighten multiple clamping blocks. The clamping holes formed by the multiple clamping blocks are used to clamp the shaft of the motor under test. Then, the adjusting ring and multiple clamping blocks are rotated by the rotation drive component, so that the shaft of the motor under test rotates. This structure of the shaft clamping assembly can better ensure the clamping effect of the shaft clamping assembly on the shaft of the motor under test. Furthermore, the multiple clamping blocks can be tightened or released naturally by the action of the shaft-clamping drive cylinder to clamp or release the shaft of the motor under test. This makes it easier to use the shaft-clamping rotation mechanism, improves the degree of automation, and makes it easier to test the shaft voltage of the motor under test.
[0019] In a preferred embodiment of this application, when the motor to be tested is placed on the motor positioning fixture, the shaft of the motor to be tested is positioned downwards; the shaft-holding rotation mechanism is disposed in the main housing of the test chassis and is located below the motor positioning fixture.
[0020] In the implementation of the above technical solution, the shaft-holding rotation mechanism is set in the main body of the test chamber and located below the motor positioning fixture. The shaft-holding rotation mechanism can be hidden in the main body of the test chamber, which can save the space of the test chamber and better ensure test safety. At the same time, it can avoid the direct exposure of the shaft-holding rotation mechanism, thus reducing the failure rate of the shaft-holding rotation mechanism.
[0021] In a preferred embodiment of this application, the motor voltage testing device further includes a lifting test component, which is movably and vertically mounted on the testing chassis, and the lifting test component is provided with an upper probe; The motor positioning fixture is equipped with a lower probe; both the lower probe and the upper probe are connected to the voltage measuring instrument.
[0022] In the implementation of the above technical solution, when the motor under test is placed on the motor positioning fixture of the test chassis, the lower probe can be made to abut against the lower end cover of the motor under test, and the upper probe can be made to abut against the upper end cover of the motor under test by the lifting and lowering movement of the lifting test component. In this way, the voltage of the end cover at both ends of the motor under test can be tested using the upper and lower probes, and the voltage difference between the two ends of the end cover of the motor under test can be obtained, providing more voltage test data for the voltage test of DC motors, which is beneficial for the quality assessment of the motor under test.
[0023] In a preferred embodiment of this application, the test chassis is provided with two sets of the motor positioning fixture, the power connector, the voltage measuring instrument, and the shaft rotating mechanism.
[0024] In the implementation of the above technical solution, by setting up two sets of motor positioning fixtures, power connectors, voltage measuring instruments and shaft rotation mechanisms, the motor voltage testing device can test the shaft voltage of two motors under test separately, thus further improving the testing efficiency of the shaft voltage of the motors under test.
[0025] This application discloses a motor voltage testing device, which, compared with the prior art, has at least the following advantages: The motor voltage testing device of this application includes a testing chassis and a shaft-clamping rotation mechanism. The testing chassis is equipped with a motor positioning fixture, a power connector, and a voltage measuring instrument. When testing is required, the motor to be tested can be placed on the motor positioning fixture in the testing chassis, and one end of the motor's lead wire can be connected to the power connector on the testing chassis to supply power to the motor. The shaft-clamping rotation mechanism is located on the testing chassis. During actual testing, the shaft-clamping rotation mechanism clamps the shaft of the motor to be tested and drives it to rotate. The voltage measuring instrument uses a voltage sensing line connected to the shaft-clamping rotation mechanism to obtain the shaft voltage of the motor to be tested, thereby enabling... The test results of the shaft voltage of the motor under test are obtained, which can determine whether the shaft voltage of the motor under test is too high or unqualified. After the tester places the motor under test on the motor positioning fixture and connects one end of the motor's lead wire to the power connector on the test chassis, the motor voltage test can be performed automatically. This can effectively improve the testing efficiency, greatly reduce the cost of manual testing, and is very suitable for the shaft voltage testing and full inspection of DC motors in batches. This can improve the quality of DC motor shaft voltage testing and the factory quality of DC motors, and effectively ensure the consistency of DC motor shaft voltage test results. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a three-dimensional structural schematic diagram of the motor voltage testing device provided in the embodiments of this application; Figure 2 This is a three-dimensional structural schematic diagram of the power connector and wire-pulling assembly provided in the embodiments of this application; Figure 3 This is a three-dimensional structural diagram of the motor under test, the power connector, and the wire disconnect assembly provided in the embodiments of this application; Figure 4 This is a three-dimensional structural schematic diagram of the shaft-holding rotation mechanism provided in the embodiments of this application; Figure 5 This is an exploded view of the structure of the shaft-holding rotation mechanism provided in the embodiments of this application; Figure 6 This is a cross-sectional structural schematic diagram of the shaft-holding rotation mechanism provided in the embodiments of this application; Figure 7 yes Figure 1 One of the enlarged schematic diagrams of the local structure; Figure 8 yes Figure 1 The second enlarged schematic diagram of the local structure.
[0028] Reference numerals: 11. Test chassis; 12. Motor positioning fixture; 121. Lower probe; 13. Power connector; 14. Voltage sensing wire; 15. Shaft-holding rotation mechanism; 151. Shaft-holding assembly; 1511. Mounting plate; 1512. Shaft-holding drive cylinder; 1513. Connecting shaft; 1514. Adjusting ring; 1515. Shaft clamping block; 152. Rotation drive component; 16. Wire pulling assembly; 161. Wire pulling drive cylinder; 162. Pulling plate; 17. Lifting test assembly; 171. Upper probe; 20. Motor under test; 21. Lead wire; 211. Lock. Detailed Implementation
[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.
[0034] Currently, the main method for testing the shaft voltage of DC motors is manual testing. This manual testing method has low testing efficiency and high cost, making it unsuitable for batch testing of DC motor shaft voltage. As a result, most existing batch testing of DC motor shaft voltage uses a sampling inspection method. This can lead to some motors with excessively high shaft voltages going undetected, reducing the quality of the DC motor shaft voltage test and the quality of the DC motors leaving the factory. Furthermore, manual testing is easily affected by the subjective factors of the testers, making it difficult to ensure the consistency of the DC motor shaft voltage test results.
[0035] To address the problems in the prior art, this application provides a motor voltage testing device that can automatically test the shaft voltage of the motor under test, improving testing efficiency and significantly reducing manual testing costs. It is very suitable for batch shaft voltage testing and full inspection testing of DC motors, thereby improving the quality of DC motor shaft voltage testing and the factory quality of DC motors, and effectively ensuring the consistency of DC motor shaft voltage testing results.
[0036] Example 1 See Figure 1 , Figures 4 to 6 The motor voltage testing device according to an embodiment of this application includes: The test chassis 11 is equipped with a motor positioning fixture 12, a power connector 13 and a voltage measuring instrument (not shown in the figure). The motor positioning fixture 12 is used to place the motor 20 to be tested, and the power connector 13 is used to connect to one end of the lead wire 21 of the motor 20 to be tested. A shaft-clamping rotation mechanism 15 is mounted on the test housing 11 and is used to clamp the shaft of the motor 20 under test and drive the shaft of the motor 20 under test to rotate. A voltage measuring instrument is connected to a voltage sensing line 14, which is connected to the shaft-clamping rotation mechanism 15 and is used to collect the shaft voltage of the motor 20 under test.
[0037] The motor voltage testing device of this application embodiment can be applied to test the shaft voltage of DC motors, especially the shaft voltage test of batch DC motors, so as to facilitate the quality inspection of batch DC motors.
[0038] In this embodiment, the test chassis 11 has a mounting platform, wherein the motor positioning fixture 12 and the power connector 13 are disposed on the mounting platform of the test chassis 11; the voltage measuring instrument can also be disposed on the mounting platform of the test chassis 11, or the voltage measuring instrument can be disposed on the back panel of the test chassis 11. In this embodiment, the voltage measuring instrument is disposed on the back panel of the test chassis 11; preferably, the back panel of the test chassis 11 can be provided with an openable door or a viewing window for the test personnel to view.
[0039] In this embodiment, the motor positioning fixture 12 can be fixed on the mounting platform of the test chassis 11. The motor positioning fixture 12 can be used for the placement and positioning of the motor 20 to be tested. The power connector 13 is connected to the power supply device of the test chassis 11 through the connecting wire. When one end of the lead wire 21 of the motor 20 to be tested is connected to the power connector 13, the motor 20 to be tested can be powered.
[0040] In this embodiment, the shaft-holding rotation mechanism 15 is disposed on the test housing 11 and close to the motor positioning fixture 12. For example, the shaft-holding rotation mechanism 15 can be disposed on the test housing 11 and located above the motor positioning fixture 12. In actual testing, the shaft voltage of the motor under test 20 can only be measured when the shaft of the motor under test 20 is in a rotating state. Therefore, the shaft-holding rotation mechanism 15 can clamp the shaft of the motor under test 20 and drive the shaft of the motor under test 20 to rotate, thereby enabling the voltage measuring instrument to collect the shaft voltage of the motor under test 20 when the shaft is in a rotating state through the voltage sensing line 14.
[0041] The motor voltage testing device of this embodiment can place the motor 20 to be tested on the motor positioning fixture 12 of the test chassis 11, connect one end of the lead wire 21 of the motor 20 to the power connector 13 on the test chassis 11, and supply power to the motor 20 through the power connector 13; in actual testing, the shaft of the motor 20 to be tested is clamped by the shaft-holding rotation mechanism 15 and the shaft of the motor 20 to be tested is rotated, and the shaft voltage of the motor 20 to be tested is obtained by using the voltage sensing line 14 of the voltage measuring instrument connected to the shaft-holding rotation mechanism 15, thereby obtaining the test result of the shaft voltage of the motor 20 to be tested, thus determining the value of the motor 20 to be tested. The device tests whether the shaft voltage of motor 20 is too high or unqualified. After the tester places the motor 20 to be tested on the motor positioning fixture 12 and connects one end of the lead wire 21 of the motor 20 to the power connector 13 on the test chassis 11, the device can automatically test the shaft voltage of the motor 20. This can effectively improve the testing efficiency and greatly reduce the cost of manual testing. It is very suitable for the shaft voltage testing and full inspection of DC motors in batches. This can improve the quality of DC motor shaft voltage testing and the factory quality of DC motors, and effectively ensure the consistency of DC motor shaft voltage test results.
[0042] In this embodiment, the test chassis 11 is equipped with two sets of motor positioning fixtures 12, power connectors 13, voltage measuring instruments, and shaft rotating mechanisms 15.
[0043] Specifically, the two sets of motor positioning fixtures 12, power connectors 13, voltage measuring instruments, and shaft-holding rotation mechanisms 15 are distributed on the left and right sides of the test chamber 11; understandably, the two sets of motor positioning fixtures 12, power connectors 13, voltage measuring instruments, and shaft-holding rotation mechanisms 15 can operate independently.
[0044] In the above structure, by setting two sets of motor positioning fixtures 12, power connectors 13, voltage measuring instruments and shaft rotating mechanisms 15, the motor voltage testing device can test the shaft voltage of two motors 20 to be tested respectively, which can further improve the testing efficiency of the shaft voltage of the motors 20 to be tested.
[0045] Preferably, in this embodiment, the voltage measuring instrument is an oscilloscope, which is configured to provide an abnormality alert when the shaft voltage of the motor 20 under test is greater than a preset shaft voltage threshold.
[0046] Optionally, in this embodiment, the oscilloscope may flash an LED or emit an alarm sound to indicate an anomaly.
[0047] Optionally, in this embodiment, the voltage measuring instrument can also be connected to a computer device to record and store the collected shaft voltage of the motor 20 under test through the computer device.
[0048] In the above structure, the voltage measuring instrument is an oscilloscope. Oscilloscopes usually have the function of automatically identifying whether the voltage is too high. Therefore, the shaft voltage threshold can be preset on the oscilloscope. When the shaft voltage of the motor under test 20 is greater than the preset shaft voltage threshold, the oscilloscope will provide an abnormal prompt, without the need for the tester to observe and judge it. This can further improve the testing efficiency of the shaft voltage of the motor under test 20 and reduce the possibility of misjudgment by the tester, thereby further improving the testing accuracy and test effect of the shaft voltage of the motor under test 20.
[0049] Furthermore, in this embodiment, when the motor 20 to be tested is placed on the motor positioning fixture 12, the shaft of the motor 20 to be tested is set downwards; the shaft-holding rotation mechanism 15 is set in the main body of the test housing 11 and is located below the motor positioning fixture 12.
[0050] Specifically, a through hole (not shown in the figure) can be provided at the position of the motor positioning fixture 12 on the mounting platform of the test chassis 11, so that the shaft of the motor 20 to be tested can pass through the through hole and be clamped by the shaft-holding rotation mechanism 15 below.
[0051] In the above structure, the shaft-holding rotation mechanism 15 is set in the main body of the test housing 11 and located below the motor positioning fixture 12. The shaft-holding rotation mechanism 15 can be hidden in the main body of the test housing 11, which can save the space of the test housing 11 and better ensure test safety. At the same time, it can avoid the direct exposure of the shaft-holding rotation mechanism 15, thus reducing the failure rate of the shaft-holding rotation mechanism 15.
[0052] Example 2 See Figure 1 , Figures 4 to 6 Based on the above embodiment one, the difference between this embodiment and embodiment one is that in this embodiment, the motor positioning fixture 12 of the motor voltage testing device is a motor positioning ring, the size of the motor positioning ring is adapted to the motor 20 to be tested, and the motor positioning ring forms a motor positioning ring opening.
[0053] In this embodiment, the motor positioning ring is an annular body, and the diameter of the motor positioning ring is adapted to the size of the outer shell of the motor 20 to be tested. The motor positioning ring opening formed by the motor positioning ring can cooperate with the structure of the head of the motor 20 to be tested to position the motor 20.
[0054] In the above structure, the motor positioning fixture 12 adopts a motor positioning ring, which can reduce the complexity of the motor positioning fixture 12, facilitate the manufacturing and production of the motor positioning fixture 12, and the size of the motor positioning ring is compatible with the motor 20 to be tested, and the motor positioning ring forms a motor positioning ring opening, which is very suitable for the placement and positioning of the motor 20 to be tested, and can have a good positioning effect on the motor 20 to be tested.
[0055] It should be noted that in other embodiments, the motor positioning fixture 12 may also take other shapes. For example, the motor positioning fixture 12 may also take the structure of a motor positioning block. The motor positioning block is a flat cuboid with a positioning recess and a through hole on the bottom wall of the positioning recess for the shaft of the motor 20 to be tested to pass through.
[0056] Example 3 See Figures 1 to 3 Based on the above embodiment one or embodiment two, the difference between this embodiment and embodiment one or embodiment two is that, in this embodiment, the motor voltage testing device has a wire pulling component 16 at the location where the power connector 13 is set. The wire pulling component 16 is used to pull out one end of the lead wire 21 of the motor 20 to be tested connected to the power connector 13.
[0057] In the above structure, a wire-pulling assembly 16 is provided at the position of the power connector 13 on the test chassis 11. When the test is completed, the wire-pulling assembly 16 can automatically pull out one end of the lead wire 21 of the motor under test 20 connected to the power connector 13, without the need for the test personnel to manually pull out one end of the lead wire 21 of the motor under test 20. This facilitates the work of the test personnel and further improves the efficiency of shaft voltage testing of the motor under test 20.
[0058] Furthermore, in this embodiment, a latch 211 is provided at one end of the lead wire 21 of the motor 20 to be tested, which is connected to the power connector 13; the wire pulling assembly 16 includes a wire pulling drive cylinder 161 and a pulling tab 162. The wire pulling drive cylinder 161 is installed in the test chamber 11. The working end of the wire pulling drive cylinder 161 is connected to the pull plate 162. The pull plate 162 is used to release the lock 211 so that one end of the lead wire 21 of the motor 20 under test is pulled out from the power connector 13.
[0059] Specifically, in this embodiment, the power connector 13 is disposed on a connecting support; the lever 162 is disposed on the connecting support, and the lever's actuating end extends to the bottom of the power connector 13.
[0060] In the above structure, when the test is completed, the pulling plate 162 can be moved upward by the working end of the pulling drive cylinder 161, and the pulling plate 162 acts on the latch 211 set at one end of the lead wire 21 of the motor under test 20, so that the latch 211 is released and one end of the lead wire 21 of the motor under test 20 is pulled out from the power connector 13. The setting of the latch 211, as well as the pulling drive cylinder 161 and the pulling plate 162, can facilitate the pulling out of one end of the lead wire 21 of the motor under test 20 from the power connector 13, and ensure the pulling effect and the success rate of pulling out.
[0061] Example 4 See Figures 1 to 6 Based on the above embodiments one to three, the motor voltage testing device of this embodiment includes a shaft clamping assembly 151 and a rotation drive component 152. The shaft clamping assembly 151 is set on the test housing 11 near the motor positioning fixture 12 and is used to clamp the shaft of the motor 20 to be tested; The rotary drive 152 is driven to rotate the shaft clamping assembly 151, thereby driving the shaft of the motor 20 under test to rotate.
[0062] In the above structure, during actual testing, the shaft of the motor under test 20 is clamped by the shaft clamping assembly 151, and the shaft clamping assembly 151 is driven to rotate by the rotation drive 152, thereby causing the clamped shaft of the motor under test 20 to rotate. Through the arrangement and cooperation of the shaft clamping assembly 151 and the rotation drive 152, the function of the shaft clamping and rotating mechanism 15 can be well realized, so that the shaft of the motor under test 20 can rotate, which is also beneficial for testing the shaft voltage of the motor under test 20.
[0063] Furthermore, in this embodiment, the shaft clamping assembly 151 includes a mounting plate 1511, a shaft clamping drive cylinder 1512, an adjusting ring 1514, and multiple shaft clamping blocks 1515. Mounting plate 1511 is mounted on test chassis 11; The working end of the shaft-driven cylinder 1512 is connected to the mounting plate 1511; The adjusting ring 1514 is disposed on the mounting plate 1511, and the output end of the rotary drive component 152 passes through the mounting plate 1511 and is driven to connect with the adjusting ring 1514. Multiple clamping shaft blocks 1515 are spliced together in the shape of an inverted frustum and are set in the adjusting ring 1514. The multiple clamping shaft blocks 1515 form a clamping shaft hole.
[0064] The mounting plate 1511 is movably mounted on the test chassis 11. The output end of the rotary drive 152 passes through the mounting plate 1511 and is driven to connect with the adjusting ring 1514 via a connecting shaft 1513. The output end of the rotary drive 152 drives the adjusting ring 1514 to rotate via the connecting shaft 1513. In this embodiment, three clamping shaft blocks 1515 are provided. The three clamping shaft blocks 1515 have the same structural dimensions and are spliced together to form an inverted frustum shape.
[0065] In the above structure, the mounting plate 1511 can move upward under the action of the shaft-clamping drive cylinder 1512, thereby driving the adjusting ring 1514 to tighten the multiple clamping blocks 1515 and make the adjusting ring 1514 and the multiple clamping blocks 1515 tightly connected. The shaft of the motor 20 under test is clamped by the clamping holes formed by the multiple clamping blocks 1515. Then, the adjusting ring 1514 and the multiple clamping blocks 1515 are rotated by the rotation drive component 152, so that the shaft of the motor 20 under test is rotated. This structure of the shaft clamping assembly 151 can better ensure the clamping effect of the shaft clamping assembly 151 on the shaft of the motor 20 under test. In addition, the multiple clamping blocks 1515 can be tightened or released naturally by the action of the shaft-clamping drive cylinder 1512 to clamp or release the shaft of the motor 20 under test. This makes it easier to use the shaft-clamping rotation mechanism 15, improves the degree of automation, and makes it easier to test the shaft voltage of the motor 20 under test.
[0066] Example 5 See Figures 1 to 8 Based on any of the above embodiments one to four, the difference between this embodiment and any of the above embodiments one to four is that the motor voltage testing device of this embodiment further includes a lifting test component 17, which is movably and vertically mounted on the test housing 11, and the lifting test component 17 is provided with an upper probe 171. The motor positioning fixture 12 is equipped with a lower probe 121; both the lower probe 121 and the upper probe 171 are connected to a voltage measuring instrument.
[0067] In this embodiment, the lifting test assembly 17 may include a lifting drive cylinder (not shown in the figure), a lifting adjustment block, and an upper probe 171. The working end of the lifting drive cylinder is driven and connected to the lifting adjustment block. The lifting adjustment block is mounted on two guide rods on the mounting platform of the test housing 11. The upper probe 171 is mounted on the lifting adjustment block. Preferably, in this embodiment, a buffer pad is provided below the lifting adjustment block. The buffer pad can protect the motor 20 under test when the lifting test assembly 17 is being tested.
[0068] For example, the upper probe 171 and the lower probe 121 may be elastic probes.
[0069] In the above structure, when the motor under test 20 is placed on the motor positioning fixture 12 of the test chassis 11, the lower probe 121 can abut against the lower end cover of the motor under test 20, and the upper probe 171 can abut against the upper end cover of the motor under test 20 by the lifting and lowering movement of the lifting test assembly 17. In this way, the end cover voltage at both ends of the motor under test 20 can be tested using the upper probe 171 and the lower probe 121, and the voltage difference at both ends of the end cover of the motor under test 20 can be obtained, providing more voltage test data for the voltage test of DC motor, which is beneficial for the quality assessment of the motor under test 20.
[0070] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.
[0071] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.
[0072] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0073] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.
Claims
1. An electrical machine voltage testing device, characterized by, The motor voltage testing device comprises a test box, a motor positioning jig, a power-on connector, and a voltage measuring instrument. The motor positioning jig is used for placing a motor to be tested. The power-on connector is used for connecting to one end of a lead-out wire of the motor to be tested.
2. The motor voltage testing device of claim 1, wherein, The voltage measuring instrument is connected with a voltage sensing wire.
3. The motor voltage testing device of claim 1, wherein, The voltage sensing wire is connected to the shaft rotation mechanism and is used for collecting the shaft voltage of the motor to be tested.
4. The motor voltage testing device of claim 3, wherein, The motor positioning jig is a motor positioning ring. The motor positioning ring is sized to be matched with the motor to be tested.
5. The motor voltage testing device of claim 1, wherein, The test box is provided with a wire pulling assembly at the position of the power-on connector.
6. The motor voltage testing device of claim 1, wherein, One end of the lead-out wire of the motor to be tested connected to the power-on connector is provided with a lock catch. The wire pulling assembly comprises a wire pulling driving cylinder and a pulling piece. The wire pulling driving cylinder is arranged in the test box.
7. The motor voltage testing device of claim 6, wherein, The acting end of the wire pulling driving cylinder is connected with the pulling piece. The pulling piece is used for releasing the lock catch to pull out one end of the lead-out wire of the motor to be tested from the power-on connector. The voltage measuring instrument is an oscilloscope. When the shaft voltage of the motor to be tested is greater than a preset shaft voltage threshold, the oscilloscope performs an abnormality prompt. The shaft rotation mechanism comprises a shaft clamping assembly and a rotation driving member.
8. The motor voltage testing device of claim 1, 6, or 7, wherein, The shaft clamping assembly is arranged on the test box close to the motor positioning jig.
9. The motor voltage testing device of claim 1, wherein, The rotation driving member is drivingly connected with the shaft clamping assembly. The shaft clamping assembly comprises a mounting plate, a shaft clamping driving cylinder, an adjusting ring, and a plurality of shaft clamping blocks.
10. The motor voltage testing device of claim 1, wherein, The mounting plate is arranged on the test box. The acting end of the shaft clamping driving cylinder is connected with the mounting plate. The adjusting ring is arranged on the mounting plate. The output end of the rotation driving member penetrates through the mounting plate and is drivingly connected with the adjusting ring. The plurality of shaft clamping blocks are spliced to form an inverted circular table shape and are arranged in the adjusting ring. When the motor to be tested is placed on the motor positioning jig, the shaft of the motor to be tested is arranged downward. The shaft rotation mechanism is arranged in the main box body of the test box and is located below the motor positioning jig. The motor voltage testing device further comprises a lifting test assembly. The lifting test assembly is arranged on the test box in a liftable and movable manner. The motor positioning jig is provided with a lower probe. The lower probe and the upper probe are connected with the voltage measuring instrument. The test box is provided with two groups of the motor positioning jig, the power-on connector, the voltage measuring instrument, and the shaft rotation mechanism.