Motor testing assembly, motor testing device and method for testing motor

Abstract

The present disclosure relates to a motor test assembly, including a base, a motor mounting plate assembly for fixing a motor to be tested and fixedly mounted to the base, and two test kits located on both sides of the motor mounting plate assembly. Each test kit includes: a nut mounting plate assembly, which is provided with a nut for rotating on a screw rod of the motor to be tested, and the nut mounting plate assembly is movably mounted to the base relative to the base; a load mounting plate assembly, which is movably mounted to the base relative to the base and includes a force sensor, a load connecting rod is provided between the load mounting plate assembly and the nut mounting plate assembly, and the movement energy of the nut mounting plate is transmitted to the load mounting plate assembly through the load connecting rod, and when the nut mounting plate drives the load mounting plate assembly to move, the load connecting rod abuts against the force sensor; a load fixing plate, which is fixedly mounted to the base, and the load fixing plate is connected to the load mounting plate assembly by one or more tension springs. The present disclosure also relates to a motor testing device and a method for testing a motor.

Description

Technical Field

[0001] The present disclosure relates to a motor test assembly, a motor test device having the motor test assembly, and a method for testing a motor. Background Art

[0002] In order to ensure the reliability of motor operation and verify motor performance indicators, it is necessary to conduct life tests on the motor. For example, the motor may be allowed to run for a period of time during the test to examine the degree of motor aging at the end of these working condition tests and determine whether the motor service life meets the requirements.

[0003] The existing test device is a device with a single linear guide rail installed vertically, such as the device disclosed in patent CN204789942U. During the test, the load is manually increased axially, and the load display is not intuitive enough. The number of weights needs to be calculated manually. It can only test the life of a lead screw stepper motor with a unidirectional output shaft, and the test has low versatility and is only applicable to a few motor types such as the 42 series two-phase stepper motor. The overall appearance looks simple and unsightly. Summary of the invention

[0004] The purpose of the present disclosure is to propose a new type of motor testing component and a motor testing device having the motor testing component to solve the above-mentioned problems, and it is hoped that the proposed motor testing component and motor testing device can be used for dual-shaft motor testing compared to traditional solutions, which is beneficial to the particularity and versatility of serialized dual-shaft motors, and is more operable, visual, aesthetically pleasing and manageable, etc.

[0005] To achieve the above objectives, the present disclosure proposes a motor testing assembly, a motor testing device and a motor testing method having the following technical features.

[0006] The present disclosure first proposes a motor test assembly, including a base, a motor mounting plate assembly for fixing the motor to be tested and fixedly mounted to the base, and two test kits located on both sides of the motor mounting plate assembly. Each test kit includes: a nut mounting plate assembly, which is provided with a nut for rotating on the screw of the motor to be tested, and the nut mounting plate assembly is movably mounted to the base relative to the base; a load mounting plate assembly, which is movably mounted to the base relative to the base, and includes a force sensor, wherein a load connecting rod is provided between the load mounting plate assembly and the nut mounting plate assembly, and the movement of the nut mounting plate assembly can be transmitted to the load mounting plate assembly through the load connecting rod, and wherein, when the nut mounting plate assembly drives the load mounting plate assembly to move, the load connecting rod abuts against the force sensor; a load fixing plate, which is fixedly mounted to the base, wherein the load fixing plate is connected to the load mounting plate assembly by one or more tension springs.

[0007] Preferably, the two test suites are arranged in mirror image to each other.

[0008] Preferably, the motor mounting plate assembly, the nut mounting plate assembly, the load mounting plate assembly, and the load fixing plate are arranged parallel to each other.

[0009] Preferably, the load mounting plate assembly is located on a side of the nut mounting plate assembly away from the motor mounting plate assembly.

[0010] Preferably, each test kit comprises two load fixing plates, the two load fixing plates are located on a side of the load mounting plate assembly close to the motor mounting plate assembly, and the nut mounting plate assembly is located between the two load fixing plates.

[0011] Preferably, the length of the load mounting plate assembly is greater than the sum of the lengths of the two load fixing plates and the nut mounting plate assembly.

[0012] Preferably, the motor mounting plate assembly comprises a main motor mounting plate fixedly mounted to the base, and an auxiliary motor mounting plate connected to the main motor mounting plate, the motor to be tested being fixed to the auxiliary motor mounting plate.

[0013] Preferably, both the main motor mounting plate and the auxiliary motor mounting plate are provided with a recess for allowing the lead screw of the motor to be tested to pass through.

[0014] Preferably, the size of the recess of the auxiliary motor mounting plate is different from the size of the recess of the main motor mounting plate.

[0015] Preferably, the nut mounting plate assembly comprises a main nut mounting plate movably mounted to the base relative to the base, and an auxiliary nut mounting plate fixed to the main nut mounting plate, the nut being fixed to the auxiliary nut mounting plate.

[0016] Preferably, both the main nut mounting plate and the auxiliary nut mounting plate are provided with a notch for allowing the screw of the motor to be tested to pass through, and the nut is fixed to the auxiliary nut mounting plate at the notch of the auxiliary nut mounting plate.

[0017] Preferably, the load mounting plate assembly and the load fixing plate are respectively provided with tension spring columns facing each other, and the tension spring is connected to the load mounting plate assembly and the load fixing plate through the tension spring columns.

[0018] Preferably, the motor test assembly comprises a plurality of guide posts, wherein the nut mounting plate assembly and the load mounting plate assembly are movably supported by the guide posts.

[0019] Preferably, the motor mounting plate assembly, the nut mounting plate assembly, the load mounting plate assembly, and the load fixing plate are all provided with holes through which the guide columns pass.

[0020] Preferably, the motor test assembly comprises a plurality of guide seats fixed to the base.

[0021] Preferably, the plurality of guide seats are symmetrically arranged at two axial ends of the base.

[0022] The present disclosure also provides a motor testing device, comprising a motor testing assembly as described in any one of the above items.

[0023] Preferably, the motor testing device comprises a test bench, a control unit for controlling the motor is arranged on the test bench, wherein a base of the motor testing assembly is fixed to the top of the test bench.

[0024] Preferably, the electric machine testing device comprises a processing unit for processing data from the sensors.

[0025] Preferably, the motor testing device comprises one or more of a touch screen, a control button, and a display.

[0026] The present disclosure also proposes a method for testing a motor using the motor testing assembly or the motor testing device described above, wherein the motor is a double-shaft motor with a screw, and the method generally includes the following steps: installing the motor on the motor mounting plate assembly of the motor testing assembly, and screwing the nut of each nut mounting plate assembly of the motor testing assembly onto the screw of the motor; setting the motor operating parameters; operating the motor so that the motor repeatedly runs several test cycles based on the motor operating parameters; and recording the load and the number of reciprocating cycles when the motor motion state begins to fail.

[0027] Preferably, before operating the motor, the load connecting rod may be adjusted to be close to but not in contact with the load cell of the load mounting plate assembly.

[0028] Preferably, the method may further include: adjusting the motor operating parameters, and causing the motor to repeatedly operate for a plurality of test cycles based on the adjusted motor operating parameters.

[0029] Preferably, the method further comprises: adjusting a tension spring of the motor test assembly to change the load.

[0030] Preferably, the method further comprises: replacing the nut of the nut mounting plate assembly, and recording the influence of different loads and different motor operating parameters on the life cycle of the nut.

[0031] Preferably, the method further comprises: replacing the auxiliary motor mounting plate.

[0032] Preferably, the method further comprises: replacing the auxiliary nut mounting plate.

[0033] The solution proposed in this disclosure adopts a special and universal bidirectional loading method, which has at least the following advantages compared with the traditional solution:

[0034] 1. Ensure the installation and positioning of the motor under test, ensure coaxiality, and improve product testing stability.

[0035] 2. The versatility and operability of the test mechanism. By replacing adapter plates of different specifications, it can cover more series of motors, has stronger versatility, and is easy for later tooling management.

[0036] 3. Balanced horizontal load on both sides ensures load balance on the test surface, making the test more stable.

[0037] 4. The load is increased by using a tension spring combination suspension to make the upper limit of the test load higher.

[0038] The best embodiment for implementing the present disclosure and its specific advantages will be described in more detail below in conjunction with the accompanying drawings so that the features and advantages of the present disclosure can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments of the present disclosure are briefly introduced below. The drawings are only used to show some embodiments of the present disclosure, but not to limit all embodiments of the present disclosure thereto.

[0040] Figure 1 A specific embodiment of a motor testing device according to the present disclosure is shown;

[0041] Figure 2 A specific embodiment of a motor test assembly according to the present disclosure is shown;

[0042] Figure 3A , 3B A specific implementation of the motor mounting plate assembly is shown at different angles;

[0043] Figure 4 A specific embodiment of the nut mounting plate assembly is shown;

[0044] Figure 5 A specific embodiment of a load mounting plate assembly is shown;

[0045] Figure 6 A specific embodiment of a load fixing plate is shown;

[0046] Figure 7 A specific implementation of the guide seat is shown;

[0047] Figure 8 The assembly of the motor mounting plate assembly and two nut mounting plate assemblies is shown;

[0048] Fig. 9 A specific implementation of the auxiliary nut mounting plate is shown;

[0049] Fig.10 A specific implementation of the auxiliary motor mounting plate is shown;

[0050] Fig.11 An exemplary test interface of a motor test device is shown;

[0051] Fig.12 An exemplary illustration of a retaining ring 50 is shown.

[0052] Reference numerals list

[0053] 1 Motor test assembly

[0054] 2 Test bench

[0055] 3 Touch screen

[0056] 4 Control buttons

[0057] 10 Base

[0058] 20 Motor mounting plate assembly

[0059] 21 Main motor mounting plate

[0060] 22 Auxiliary motor mounting plate

[0061] 23 Fasteners

[0062] 30 Nut mounting plate assembly

[0063] 31 Main nut mounting plate

[0064] 32 Auxiliary nut mounting plate

[0065] 33 Load connecting rod

[0066] 40 Load mounting plate assembly

[0067] 41 Force sensor

[0068] 42 Extension spring

[0069] 43 tension spring column

[0070] 45 Load fixing plate

[0071] 50 Fixing ring

[0072] 51 Fastening screw

[0073] 60 Guide column

[0074] 62 Linear bearings

[0075] 70 Guide seat

[0076] 71 Guide seat upper part

[0077] 72 Guide seat lower part

[0078] 80 Motor DETAILED DESCRIPTION

[0079] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0080] Compared to the embodiments shown in the drawings, feasible implementations within the scope of the present disclosure may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0081] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity restriction. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0082] The present disclosure proposes a novel motor test assembly 1, a motor test device having the motor test assembly 1, and a method for testing a motor using the motor test assembly 1 or the motor test device. Among them, the present disclosure is particularly suitable for testing a double-shaft motor having screw rods extending from both sides of the motor. But at the same time, the motor test assembly 1 and the motor test assembly 1 can also be used for testing a single-shaft motor. In addition, the present disclosure is applicable to a variety of motor types such as stepper motors. As can be seen from the following description, the scheme of the present disclosure has the particularity and versatility that are beneficial to serialized double-shaft motors, and is more operable, visual, aesthetic, and manageable.

[0083] Figure 1 The overall structure of a specific embodiment of a motor testing device according to the present disclosure is shown. Figure 2 A specific embodiment of the motor test assembly 1 according to the present disclosure is shown. Figure 1 The motor test equipment includes Figure 2 The motor test component 1 is integrated with the electrical control part to simulate the service life of the double-output shaft screw motor.

[0084] See Figure 1 The motor testing device comprises a test bench 2, Figure 2 The base 10 of the motor test assembly 1 is fixed to the test bench 2. Preferably, the base 10 of the motor test assembly 1 is fixed to the top of the test bench 2.

[0085] Optionally, a control unit for controlling the motor is arranged on the test bench 2 , for example, inside the test bench 2 .

[0086] Optionally, the motor testing device comprises a processing unit (not shown) for processing data from the sensor. In addition, the motor testing device comprises one or more of a touch screen 3, a control button 4, and a display.

[0087] Optionally, the motor testing device further includes a control unit (PLC, power supply, other electrical accessories, etc.) inside the test bench 2 .

[0088] like Figure 1 The whole set of test equipment includes a motor test assembly 1, a test bench 2, a touch screen 3 and an internal control system. The test equipment and the test system are combined and integrated to establish a dedicated machine and a dedicated position. Compared with the traditional structure in which the test structure part and the control part are separated, the integrated whole of the scheme disclosed in the present invention has several advantages. For example, firstly, the structure and the control part are integrated, which is more conducive to use and maintenance, and more convenient for later management. Secondly, the overall structure is more beautiful and more visible.

[0089] See also Figure 2 , shows a specific embodiment of the motor test assembly 1 according to the present disclosure. In general, the motor test assembly 1 includes a base 10, a motor mounting plate assembly 20 and two test kits located on both sides of the motor mounting plate assembly 20.

[0090] The base 10 may be in any suitable structural form, and preferably, is a flat plate structure as shown in the figure. Other components of the motor test assembly 1 may be mounted on the base 10 .

[0091] The motor mounting plate assembly 20 is used to fix the motor 80 to be tested, and is fixedly mounted to the base 10 .

[0092] The two test kits are respectively located on both sides of the motor mounting plate assembly 20. Preferably, the two test kits are arranged in a mirror image of each other. The two test kits can be arranged symmetrically and in a mirror image relative to the motor mounting plate assembly 20, or can be arranged symmetrically and in a mirror image relative to a virtual plane located near the motor mounting plate assembly 20. Figure 8 The assembly of the motor mounting plate assembly and the two nut mounting plate assemblies is shown, which also reflects the symmetrical arrangement of the two nut mounting plate assemblies.

[0093] Each test kit includes the following main components: a nut mounting plate assembly 30, a load mounting plate assembly 40, and a load fixing plate 45. Preferably, the nut mounting plate assembly 30, the load mounting plate assembly 40, the load fixing plate 45 and the aforementioned motor mounting plate assembly 20 are arranged parallel to each other, and preferably substantially perpendicular to the base 10.

[0094] The nut mounting plate assembly 30 is movably mounted to the base 10 relative to the base 10. The nut mounting plate assembly 30 is provided with a nut for being screwed on the screw of the motor to be tested. The nut is used to be screwed on the screw of the motor to be tested. When the motor to be tested is running, the rotating screw drives the nut to move in translation, and then the nut mounting plate assembly 30 moves in translation accordingly.

[0095] The load mounting plate assembly 40 is movably mounted to the base 10 relative to the base 10. The load mounting plate assembly 40 includes a force sensor 41. A load connecting rod 33 is provided between the load mounting plate assembly 40 and the nut mounting plate assembly 30. One end of the load connecting rod 33 is fixed to the nut mounting plate assembly 30, and the other end points to the force sensor 41 on the load mounting plate assembly 40. The movement of the nut mounting plate assembly 30 can be transmitted to the load mounting plate assembly 40 through the load connecting rod 33. When the nut mounting plate assembly drives the load mounting plate assembly 40 to move, the load connecting rod 33 abuts against the force sensor 41. Before the test starts, that is, when the components do not move, the load connecting rod 33 may abut against the force sensor 41, or may only be close to the force sensor without contacting it.

[0096] The load securing plate 45 is fixedly mounted to the base 10 , wherein the load securing plate 45 is connected to the load mounting plate assembly 40 via one or more tension springs 42 .

[0097] Preferably, the load mounting plate assembly 40 and the load fixing plate 45 are connected together via a tension spring 42 .

[0098] Preferably, if Figure 2 As shown, the load mounting plate assembly 40 is located on a side of the nut mounting plate assembly 30 away from the motor mounting plate assembly 20 .

[0099] Preferably, if Figure 2 As shown, each test kit includes two load fixing plates 45. That is, one load mounting plate assembly 40 is connected to two load fixing plates 45. The two load fixing plates 45 of each test kit are located on one side of the load mounting plate assembly 40 close to the motor mounting plate assembly 20, and the nut mounting plate assembly 30 is located between the two load fixing plates 45.

[0100] Preferably, if Figure 2 As shown, the length of the load mounting plate assembly 40 is greater than the sum of the lengths of the two load fixing plates 45 and the nut mounting plate assembly 30. In this way, the nut mounting plate assembly 30 can move between the two load fixing plates 45 along its movement direction.

[0101] Through the above arrangement, the motor test assembly 1 has good space planning, and during the test process, the force distribution can be uniform, thereby improving the stability of the assembly operation. Figure 2As shown, the guidance of the entire test structure is evenly distributed on both sides of the tested motor, and the guidance of the motor and nut parts is transmitted by two linear guide columns on both sides, and the guidance of the load part is transmitted by the outermost guide column 60, and two test sensors are used on each side for combined force detection. Compared with the transmission in the form of a single guide rail, the overall structure and movement process are more stable and reliable.

[0102] Figure 3A , 3B The motor mounting plate assembly 20 is shown at different angles, and Fig.10 A specific embodiment of an auxiliary motor mounting plate that can be used for the motor mounting plate assembly 20 is shown. According to the present disclosure, the motor mounting plate assembly 20 includes a main motor mounting plate 21 fixedly mounted to the base 10, and an auxiliary motor mounting plate 22 connected to the main motor mounting plate 21, and the motor to be tested is fixed to the auxiliary motor mounting plate 22. Figure 3A , 3B As shown, the double-axis screw motor is connected to the auxiliary motor mounting plate 22, and the auxiliary motor mounting plate 22 is connected to the main motor mounting plate 21 to form a motor mounting plate assembly 20. The connection method is preferably connected by one or more fasteners 23, such as fastening screws, or connected by other similar connection methods.

[0103] As shown in the figure, both the main motor mounting plate 21 and the auxiliary motor mounting plate 22 are provided with a notch to allow the screw rod of the motor to be tested to pass through. Figure 3A , 3B As shown, the outer circle positioning portion of the motor under test is matched with the notch of the auxiliary motor mounting plate 22, and the notch of the auxiliary motor mounting plate 22 is matched with the main motor mounting plate 21. Preferably, the size of the notch of the auxiliary motor mounting plate 22 is different from the size of the notch of the main motor mounting plate 21.

[0104] Figure 4 A specific embodiment of the nut mounting plate assembly 30 is shown, and Fig. 9 A specific embodiment of an auxiliary nut mounting plate that can be used for the nut mounting plate assembly 30 is shown. The nut mounting plate assembly 30 includes a main nut mounting plate 31 movably mounted to the base 10 relative to the base 10, and an auxiliary nut mounting plate 32 fixed to the main nut mounting plate 31, and the nut screwed on the screw shaft of the double-output shaft screw motor is fixed to the auxiliary nut mounting plate 32. The main nut mounting plate 31 and the auxiliary nut mounting plate 32 are both provided with a recess allowing the screw of the motor to be tested to pass through, and the nut is fixed to the auxiliary nut mounting plate 32 at the recess of the auxiliary nut mounting plate 32. The main nut mounting plate 31 and the auxiliary nut mounting plate 32 are preferably connected by one or more fasteners, such as fastening screws, or are connected by other similar connection methods. Figure 4 As shown, the recess of the auxiliary nut mounting plate 32 is adapted to the main nut mounting plate 31 .

[0105] The main motor mounting plate 21, the auxiliary motor mounting plate 22, the main nut mounting plate 31, and the auxiliary nut mounting plate 32 are set to solve a common problem of the existing test device, that is, the installation of the motor and the nut is too single, and a set of mechanisms can only test one series of products (such as the 42 series), which is very limited. The motor test assembly 1 proposed in the present disclosure has good versatility and operability, which is achieved by setting the main motor mounting plate 21, the main nut mounting plate 31, the auxiliary nut mounting plate 32, and the auxiliary motor mounting plate 22, that is, the auxiliary nut mounting plate 32 and the auxiliary motor mounting plate 22 are provided with replaceable transfer mounting plates, which are respectively connected to the main nut mounting plate 31 and the main motor mounting plate 21, and the main nut mounting plate 31 and the main motor mounting plate 21 are universal mounting plates and are not removable. By replacing the auxiliary nut mounting plate 32 and the auxiliary motor mounting plate 22 of different installation sizes, the testing requirements of motors of different series can be realized, and the versatility is stronger and the scope of application is wider.

[0106] Figure 5 A load mounting plate assembly 40 is shown. Figure 5 As shown, the load mounting plate assembly 40 includes a load mounting plate, a tension spring column 43 and a force sensor 41 .

[0107] Figure 6 A load fixing plate 45 is shown. Figure 6 As shown, a tension spring column 43 is provided on the load fixing plate 45 .

[0108] That is, the load mounting plate assembly 40 and the load fixing plate 45 are respectively provided with tension spring columns 43 facing each other, and the tension spring is connected to the load mounting plate assembly 40 and the load fixing plate 45 through the tension spring columns 43. When the load mounting plate assembly 40 moves, since the load fixing plate 45 is fixedly installed, the tension spring 42 will be tensioned.

[0109] Preferably, the motor test assembly 1 comprises a plurality of guide columns 60 , which can be arranged parallel to the base 10 , wherein the nut mounting plate assembly 30 and the load mounting plate assembly 40 are movably supported by the guide columns 60 .

[0110] Preferably, the motor mounting plate assembly 20, the nut mounting plate assembly 30, the load mounting plate assembly 40, and the load fixing plate 45 are all provided with holes through which the guide column 60 passes. Among them, although the motor mounting plate assembly 20 and the load fixing plate 45 are not movable structures supported by the guide column 60, they can be provided with holes allowing the guide column 60 to pass through.

[0111] The end surfaces of the load fixing plate 45 and the motor mounting plate assembly 20 can be passed through a fixing ring to adjust and fix the axial position. Fig.12 An exemplary illustration of a fixing ring 50 is shown, wherein the fixing ring 50 is generally annular in structure and has a central hole that allows the guide column 60 to pass through. The fixing ring 50 has a notch, and a fastening screw 51 is arranged at the notch. By means of the fastening screw, the notch can be tightened so as to tighten the central hole of the fixing ring. The fastening of the fixing ring can play an axial fixing role on each mounting plate, and facilitates the front and rear adjustment of each mounting position. Specifically, the fixing ring 50 can be installed on both sides of the motor mounting plate assembly 20 respectively, the guide column 60 passes through the center of the fixing ring, and the fixing ring 50 holds the guide column 60 by the fastening screw to fix the motor mounting plate assembly 20. Similarly, the fixing ring 50 can be installed on one side of the load fixing plate 45 respectively, the guide column 60 passes through the center of the fixing ring, and the fixing ring 50 holds the guide column 60 by the fastening screw to fix the load fixing plate 45.

[0112] Preferably, the motor test assembly 1 comprises a plurality of guide seats 70 fixed to the base 10. The plurality of guide seats 70 may be symmetrically arranged at two axial ends of the base 10, wherein every two guide seats 70 support one guide column 60.

[0113] Preferably, the motor test assembly 1 may include a plurality of linear bearings 62, which are respectively mounted on the load mounting plate assembly 40, the load fixing plate 45, the motor mounting plate assembly 20, and the nut mounting plate assembly 30. The guide column 60 penetrates and connects all the linear bearings 62.

[0114] The guide column 60 is respectively matched with the main motor mounting plate 21 and the main nut mounting plate 31 through linear bearings, and the guide column 60 and the linear bearing can have an H7 level matching tolerance to ensure the installation and positioning accuracy of the overall transmission structure.

[0115] Figure 7 An exemplary embodiment of the guide seat 70 is shown. Figure 7 As shown, the guide seat 70 may include a guide seat upper portion 71 and a guide seat lower portion 72, which are fixed together to form the guide seat. The guide seat may be connected to the base 10, for example, by fastening screws.

[0116] Figure 1 , 2 In the embodiment shown in FIG. 6 , six guide posts 60 are shown, and each guide post 60 is supported by two guide seats. However, the number of guide posts 60 and guide seats is not limited thereto.

[0117] The motor test assembly 1 proposed in the present disclosure can realize a special and universal bidirectional loading method, and is used for testing and evaluating the life working condition of a double-shaft lead screw stepper motor.

[0118] like Figure 2 As shown, in the present disclosure, the motor mounting plate assembly 20 is axially fixed relative to the base 10, the double-shaft screw motor is fastened to the auxiliary motor mounting plate 22, and the auxiliary motor mounting plate 22 is fastened to the main motor mounting plate 21, therefore, the double-shaft screw motor, the auxiliary motor mounting plate 22, and the main motor mounting plate 21 are completely fixed axially.

[0119] The nut is tightly connected to the auxiliary nut mounting plate 32, the auxiliary nut mounting plate 32 is tightly connected to the main nut mounting plate 31, the nut is screwed onto the screw shaft of the double-output screw motor, and the nut mounting plate assembly 30 is movably connected to the guide column 60 through a linear bearing.

[0120] When the motor starts (for example, due to a command sent through the touch screen 3), the motor screw begins to rotate. Since the motor is completely fixed and the radial direction of the nut screwed on the motor screw is completely fixed, the nut moves axially along the screw, driving the nut plate assembly, load connecting rod 33, and load mounting plate assembly 40 connected thereto to move axially at the same time. Then, the tension spring column 43 on the load mounting plate assembly 40 begins to stretch the tension spring 42, and the load fixing plate 45 connected to the tension spring 42 is fixed, so the tension of the tension spring plays a role of loading at this time.

[0121] It can be seen from the structure of this solution that the two ends of the double-output shaft of the lead screw motor have the same structure, connection method and transmission method, thus realizing a two-way simultaneous loading method.

[0122] This bidirectional loading method has at least the following advantages.

[0123] First, the existing life test device can only perform life test evaluation in a single vertical direction, and due to the particularity of the dual-shaft motor, it must be tested in a bidirectional load, so the original structure can no longer meet the requirements. The present disclosure redesigns the original vertical test method into a horizontal bidirectional test method, replacing the load from weights with tension springs, thereby solving the problem of horizontal bidirectional axial load testing.

[0124] Secondly, the original life test device uses a single linear guide rail as a guide, while the present invention uses a double guide column 60 as a guide, and the force points are evenly distributed at both ends of the central axis of the motor, so the overall operation will be smoother.

[0125] The motor test assembly 1 proposed in the present disclosure can increase the upper limit of the test load by adopting a tension spring loading method. Figure 2The entire test structure load adopts an elastic tension spring, and both ends of the tension spring are connected to the tension spring column 43. When the motor drives the nut mounting plate assembly 30 to make axial linear motion, the load connecting rod 33 at its end face connection contacts with the force sensor 41, gradually driving the load mounting plate assembly 40 to make axial displacement. At this time, a reaction force is generated between the tension spring and the force sensor 41, and the test signal is fed back to the control system.

[0126] The existing weight loading method is limited in load loading, and generally cannot be increased beyond 20kg. However, the tension spring load disclosed in the present invention is distributed at both ends, and the tension spring specifications can be changed to increase the load limit, making it more operable.

[0127] The present disclosure also proposes a method for testing a motor using the motor testing assembly 1 or the motor testing device described above, wherein the motor is a double-shaft motor with a screw, and is characterized in that the method generally includes the following steps: installing the motor on the motor mounting plate assembly 20 of the motor testing assembly 1, and screwing the nut of each nut mounting plate assembly 30 of the motor testing assembly 1 onto the screw of the motor; setting the motor operating parameters; operating the motor so that the motor repeatedly runs several test cycles based on the motor operating parameters; and recording the load and the number of reciprocating cycles when the motor motion state begins to fail.

[0128] Preferably, before operating the motor, the load connecting rod 33 can be adjusted to be close to but not in contact with the load cell 41 of the load mounting plate assembly 40 .

[0129] Preferably, the method may further include: adjusting the motor operating parameters, and causing the motor to repeatedly operate for a plurality of test cycles based on the adjusted motor operating parameters.

[0130] Preferably, the method further comprises: adjusting the tension spring of the motor test assembly 1 to change the load. For example, a larger tension spring may be replaced, or the number of tension springs may be increased to increase the load.

[0131] Preferably, the method further comprises: replacing the nut of the nut mounting plate assembly 30, and recording the influence of different loads and different motor operating parameters on the life cycle of the nut.

[0132] Preferably, the method further comprises: replacing the auxiliary motor mounting plate 22. As described above, only the auxiliary motor mounting plate 22 needs to be replaced, and the main motor mounting plate 21 does not need to be replaced. In this way, the test assembly / test device can be conveniently adjusted to be suitable for different motors, such as different models of a series of motors.

[0133] Preferably, the method further comprises: replacing the auxiliary nut mounting plate 32. As described above, only the auxiliary nut mounting plate 32 needs to be replaced, and the main nut mounting plate 31 does not need to be replaced. In this way, the test assembly / test device can be conveniently adjusted to be suitable for different motors, such as different models of a series of motors.

[0134] The test system and test method are described in detail below.

[0135] The main structure of the test may include a touch screen 3 , a PLC, a driver, a power supply, a force sensor 41 , a sensor transmitter, and electrical accessories, wherein the entire control part is executed by the PLC, and the control input part is executed by the touch screen 3 .

[0136] The test item conversion body is performed by the touch screen 3 to set parameters and execute actions, and the setting parameters are written into the PLC internal ROM. The PLC receives the control instructions of the touch screen 3 and outputs the signals of each execution action. When the test sensor is affected by external force, the jumping electrical signal is transmitted to the transmitter. The transmitter amplifies the signal and inputs it into the PLC. The PLC processes the feedback data and uploads it to the touch screen 3 to display the specific load value.

[0137] like Fig.11 As shown, after all motion parameters are set in the touch screen 3, the start action is executed, and the touch screen 3 sends a control signal to the PLC. The control program is pre-written in the PLC according to the test requirements. When the start signal of the touch screen 3 is received, the motion control program is triggered, and the PLC outputs a pulse signal to control the driver. After the motor receives the driver signal, it performs axial displacement. When the connecting rod contacts the sensor, the load mounting plate assembly 40 continues to move. At this time, the tension spring gives the sensor a reaction force, and the sensor outputs a signal to the PLC. The PLC processes the signal and feeds it back to the touch screen 3 to display the specific value. The motor repeats the forward and backward displacement action to simulate the actual loading process and verify the service life of the motor.

[0138] The double-shaft lead screw motor life detection device provided by the present invention mainly verifies the life of the double-shaft lead screw motor. It mainly simulates the actual working conditions through the tension generated by axial movement, integrates the test mechanism with the test system, and thus achieves the purpose of verifying the service life of the whole machine. Compared with the traditional solution, this test structure is more conducive to the particularity and versatility of serialized double-shaft motor testing, and is more operable, visual, aesthetic, manageable, etc.

[0139] A typical motor testing process may include the following steps.

[0140] 1. Set the motion parameter test conditions, lead, displacement pulse number, Jog speed, starting speed, acceleration and deceleration, and high speed.

[0141] 2. Based on the set parameters, the system automatically calculates the motion parameters according to the conversion relationship in the PLC program.

[0142] 3. Adjust the motor position to the center of the overall structure, adjust the nuts at both ends of the double-output shaft to be close to the motor end surface, and adjust the load connecting rod 33 to a position 3mm away from the force sensor.

[0143] 4. Connect the motor to the control system. After turning on the power, click > to pre-adjust the motor movement direction. If the nut moves away from the screw end, the motor is turning correctly. Click < again to restore the nut position to its initial position.

[0144] 5. Taking 6.35mm lead as an example, set the displacement pulse number to 1000pps, the starting speed to 200pps, and the acceleration and deceleration to 10000pp / s 2 , high speed 1000pps, the actual motor speed is 300rpm, the linear speed is 31.75mm / s, the displacement distance is 31.37mm, click the start button, and the motor runs according to the above parameters.

[0145] 6. When the load connecting rod 33 begins to contact the force sensor 41, the test sensor converts the voltage variable into digital form, transmits it to the HMI through the PLC, and finally displays the actual load (assuming 10kg). After completing the displacement distance of 31.75mm / s, the nut reverses and begins to release the load until the displacement distance is 0, then a test cycle is completed. At this time, record the number of movement cycles, repeat the above steps for 100 cycles, observe the motor operation status every 100 cycles, if the status is good, increase the displacement distance appropriately, increase the load, and continue to repeat 100 cycles, and repeat this process until the motor movement state begins to fail, and record the load and number of reciprocating cycles of the motor at a constant speed of 31.75mm / s.

[0146] 7. Replace the nut, adjust the linear speed and displacement distance, and repeat tests 4 to 6. By constantly replacing the nut and adjusting the test load, record the impact of different loads and speeds on the nut life cycle.

[0147] 8. The test system has a built-in temperature sensor module to detect the current temperature value in real time.

[0148] It should be noted that this test method is not limited to double-shaft lead screw motors of a certain lead, but is also applicable to the life test of ordinary external drive, through-type, and fixed-shaft lead screw stepper motors.

[0149] The test method proposed in the present disclosure has the following advantages. 1. The data of the entire test part is visualized, the operation interface is user-friendly, and the readability is strong. 2. The test load directly displays the specific value, replacing the original weight type, and the data reading is more convenient. 3. The test cycle, load, etc. are visualized, which is convenient for parameter recording.

[0150] The present invention describes in detail an exemplary implementation of the motor test assembly 1 proposed in the present invention with reference to a preferred embodiment. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined in various ways without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A motor test assembly, characterized in that: include: Base; Multiple guide posts; A motor mounting plate assembly, which is used to fix the motor to be tested and is fixedly mounted to the base, and the motor mounting plate assembly is provided with a hole through which the guide column passes; Two test kits located on both sides of the motor mounting plate assembly, each test kit comprising: a nut mounting plate assembly, which is provided with a nut for being screwed on a screw rod of the motor to be tested, and the nut mounting plate assembly is movably mounted to the base relative to the base; a load mounting plate assembly, which is movably mounted to the base relative to the base and includes a force sensor, wherein a load connecting rod is provided between the load mounting plate assembly and the nut mounting plate assembly, movement of the nut mounting plate assembly can be transmitted to the load mounting plate assembly through the load connecting rod, and wherein when the nut mounting plate assembly drives the load mounting plate assembly to move, the load connecting rod abuts against the force sensor; a load securing plate fixedly mounted to the base, wherein the load securing plate is connected to the load mounting plate assembly via one or more tension springs; Wherein, each test kit includes two load fixing plates, the two load fixing plates are located on one side of the load mounting plate assembly close to the motor mounting plate assembly, and the nut mounting plate assembly is located between the two load fixing plates, the length of the load mounting plate assembly is greater than the sum of the lengths of the two load fixing plates and the nut mounting plate assembly, and the nut mounting plate assembly can move between the two load fixing plates along its movement direction.

2. The motor test assembly according to claim 1, characterized in that: The two test suites are arranged to mirror each other.

3. The motor test assembly according to claim 1, characterized in that: The motor mounting plate assembly, the nut mounting plate assembly, the load mounting plate assembly, and the load fixing plate are arranged parallel to each other.

4. The motor test assembly according to claim 1, characterized in that: The load mounting plate assembly is located on a side of the nut mounting plate assembly away from the motor mounting plate assembly.

5. The motor testing assembly according to claim 1, characterized in that: The motor mounting plate assembly includes a main motor mounting plate fixedly mounted to the base, and an auxiliary motor mounting plate connected to the main motor mounting plate, and the motor to be tested is fixed to the auxiliary motor mounting plate.

6. The motor testing assembly according to claim 5, characterized in that: Both the main motor mounting plate and the auxiliary motor mounting plate are provided with a notch for allowing the lead screw of the motor to be tested to pass through.

7. The motor testing assembly according to claim 6, characterized in that: The size of the recess of the auxiliary motor mounting plate is different from the size of the recess of the main motor mounting plate.

8. The motor testing assembly according to claim 1, characterized in that: The nut mounting plate assembly includes a main nut mounting plate movably mounted to the base relative to the base, and an auxiliary nut mounting plate fixed to the main nut mounting plate, the nut being fixed to the auxiliary nut mounting plate.

9. The motor testing assembly according to claim 8, characterized in that: The main nut mounting plate and the auxiliary nut mounting plate are both provided with notches for allowing the lead screw of the motor to be tested to pass through, and the nut is fixed to the auxiliary nut mounting plate at the notch of the auxiliary nut mounting plate.

10. The motor testing assembly according to claim 1, characterized in that: The load mounting plate assembly and the load fixing plate are respectively provided with tension spring columns facing each other, and the tension spring is connected to the load mounting plate assembly and the load fixing plate through the tension spring columns.

11. The motor testing assembly according to claim 1, characterized in that: The nut mounting plate assembly and the load mounting plate assembly are movably supported by guide columns.

12. The motor testing assembly according to claim 11, characterized in that: The nut mounting plate assembly, the load mounting plate assembly and the load fixing plate are all provided with holes through which the guide columns pass.

13. The motor testing assembly according to claim 11, characterized in that: The motor test assembly includes a plurality of guide seats fixed to the base.

14. The motor testing assembly according to claim 13, characterized in that: The plurality of guide seats are symmetrically arranged at two axial ends of the base.

15. A motor testing device, characterized in that: The invention comprises a motor test assembly as claimed in any one of claims 1 to 14.

16. The motor testing device according to claim 15, characterized in that: The motor testing device comprises a test bench, a control unit for controlling the motor is arranged on the test bench, wherein a base of the motor testing assembly is fixed to the top of the test bench.

17. The motor testing device according to claim 15, characterized in that: The electric machine testing device comprises a processing unit for processing data from sensors.

18. The motor testing device according to claim 15, characterized in that: The motor testing device includes one or more of a touch screen, a control button, and a display.

19. A method for testing a motor using the motor testing assembly according to any one of claims 1 to 14 or the motor testing device according to any one of claims 15 to 18, wherein the motor is a double-shaft motor with a lead screw, characterized in that: The method comprises the following steps: Mount the motor on the motor mounting plate assembly of the motor test assembly, and screw the nut of each nut mounting plate assembly of the motor test assembly onto the lead screw of the motor; Set motor operating parameters; operating the motor so that the motor repeatedly runs a number of test cycles based on the motor operating parameters; Record the load and number of reciprocating cycles when the motor motion begins to fail.

20. The method of claim 19, wherein: The method further comprises: Before operating the motor, adjust the load connecting rod to be close to, but not touching, the load cell of the load mounting plate assembly.

21. The method of claim 19, wherein: The method further comprises: The motor operating parameters are adjusted, and the motor is caused to repeatedly run a plurality of test cycles based on the adjusted motor operating parameters.

22. The method of claim 19, wherein: The method further comprises: Adjust the tension spring of the motor test assembly to vary the load.

23. The method of claim 19, wherein: The method further comprises: Replace the nuts of the nut mounting plate assembly and record the effects of different loads and different motor operating parameters on the nut life cycle.

24. The method of claim 19, wherein: The motor mounting plate assembly includes a main motor mounting plate fixedly mounted to the base, and an auxiliary motor mounting plate connected to the main motor mounting plate, the motor to be tested is fixed to the auxiliary motor mounting plate, and the method further includes: Replace the auxiliary motor mounting plate.

25. The method of claim 19, wherein: The nut mounting plate assembly includes a main nut mounting plate movably mounted to the base relative to the base, and an auxiliary nut mounting plate fixed to the main nut mounting plate, the nut being fixed to the auxiliary nut mounting plate, and the method further includes: Replace the accessory nut mounting plate.

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