Motor armature shaft axial movement amount detection auxiliary device and detection method

Abstract

The embodiment of the application provides a motor armature axial displacement detection auxiliary device and a detection method, relates to the technical field of motor detection devices, and the motor armature axial displacement detection auxiliary device comprises a positioning assembly, the positioning assembly comprises a positioning piece and a support piece detachably connected with a motor bearing gland; an axial force applying assembly, the axial force applying assembly comprises first and second force applying pieces and an axle end connecting piece detachably connected with an armature rotating shaft. The first force applying piece is inserted into the positioning piece and rotationally connected with the axle end connecting piece, is driven to move along a first axial direction by rotation, the second force applying piece is inserted into the positioning piece and abuts against the axle end connecting piece, is driven to move along a second axial direction opposite to the first axial direction by rotation and axial feeding, and the first axial direction is consistent with the axial direction of the rotating shaft. The device provides a stable installation reference through the positioning assembly, drives the rotating shaft in two directions stably through the force applying assembly, replaces traditional manual knocking, and significantly improves measurement accuracy and consistency.

Description

Technical Field

[0001] This application relates to the field of motor testing equipment technology, and in particular to an auxiliary device and testing method for detecting the axial movement of a motor armature. Background Technology

[0002] The axial runout of the traction motor armature is a key indicator for evaluating the assembly quality and operational reliability of the traction motor. During factory testing and maintenance, the axial runout of the traction motor armature must be accurately measured to ensure that the transmission clearance meets specifications.

[0003] In related technologies, an axial force is applied to the armature shaft of the traction motor by manually using hammering and prying tools to cause axial displacement, and the displacement measurement instrument is used to read the value of the axial displacement.

[0004] However, the magnitude and speed of the force applied axially to the armature shaft of the traction motor by hand are uncontrollable, resulting in low accuracy of measurement data and poor consistency among multiple measurements. Summary of the Invention

[0005] This application provides an auxiliary device and method for detecting the axial movement of a motor armature, which solves the technical problem that the magnitude and speed of the force applied manually to the axial shaft of the traction motor armature are uncontrollable, resulting in low accuracy of measurement data and poor consistency of multiple measurements.

[0006] A first aspect of this application provides an auxiliary device for detecting the axial movement of a motor armature, used for detecting the axial movement of a motor armature, comprising: a positioning assembly, the positioning assembly including a positioning member and a support member connected to the positioning member, the support member being detachably connected to a motor bearing cover; and an axial force application assembly, the axial force application assembly including a first force application member, a second force application member, and a shaft end connector respectively connected to the first force application member and the second force application member, the shaft end connector being detachably connected to the motor armature shaft, the first force application member being inserted into the positioning member and rotatably connected to the shaft end connector, the second force application member being inserted into the positioning member and abutting against the shaft end connector; wherein, the first force application member is configured to drive the shaft end connector to move along a first axial direction by its own rotation, and the second force application member is configured to drive the shaft end connector to move along a second axial direction opposite to the first axial direction by its own rotation and axial feed, wherein the first axial direction is consistent with the axial direction of the motor armature shaft.

[0007] In one possible implementation, the positioning member is provided with a first mounting hole and a first threaded hole, the first force-applying member passes through the first mounting hole and is threadedly connected to the shaft end connector; the second force-applying member passes through the first threaded hole and abuts against the shaft end connector.

[0008] In one possible implementation, the shaft end connector includes a force-applying mating part, the force-applying mating part is provided with a pull boss, the pull boss is provided with a second threaded hole, the second threaded hole is used for threaded connection with the first force-applying component.

[0009] In one possible implementation, the force-applying mating part is further provided with an abutting boss, and the abutting boss has a positioning recess on the side facing the second force-applying member, the positioning recess being used for the end of the second force-applying member to abut.

[0010] In one possible implementation, the shaft end connector further includes a shaft fixing part for threaded connection with the motor armature shaft.

[0011] In one possible implementation, both the first force-applying component and the second force-applying component are fastening bolts.

[0012] In one possible implementation, the shaft end connector is disc-shaped.

[0013] In one possible implementation, the support includes at least two support columns, one end of which is threaded to the bearing cap of the motor, and the other end of which is threaded to the positioning element.

[0014] In one possible implementation, the at least two support columns are spaced apart along the direction of the positioning element, and the at least two support columns are respectively located on both sides of the axial force application component;

[0015] And / or, the support column is a positioning screw.

[0016] A second aspect of this application provides a method for detecting the axial movement of a motor armature, employing the auxiliary device for detecting the axial movement of a motor armature as described in any of the above claims. The method includes the following steps:

[0017] The support member is installed on the motor bearing cover;

[0018] Install the shaft end connector onto the motor armature shaft;

[0019] The first force-applying component is rotated to drive the shaft end connector to move along the first axial direction, so as to apply an axial force in the first direction to the motor armature shaft until the motor armature shaft can no longer move;

[0020] Place the dial indicator probe against the end of the motor armature shaft and zero it;

[0021] The second force-applying component is rotated to drive the shaft end connector to move along the second axis, so as to apply an axial force in the second direction opposite to the first direction to the motor armature shaft until the motor armature shaft can no longer move;

[0022] After the dial indicator pointer stabilizes, record the dial indicator reading. Based on the dial indicator reading, obtain the axial movement of the motor armature.

[0023] This application provides an auxiliary device and method for detecting the axial movement of a motor armature. The auxiliary device provides a stable installation foundation and fixed reference for the detection process through a positioning component. The positioning component cooperates with a support component, and the support component is detachably connected to the bearing cap, which helps improve the overall stability during detection. The axial force application component consists of a first force application component, a second force application component, and a shaft end connector. The shaft end connector is detachably connected to the motor armature shaft and can drive the shaft to move in two opposite directions. During operation, the rotation of the first force application component and the rotation and axial feed of the second force application component drive the shaft end connector, thereby driving the axial movement of the motor armature. This replaces the traditional manual tapping or prying method, resulting in a smoother force application process and effectively improving the accuracy and consistency of the measurement results. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 This is a schematic diagram of the auxiliary device for detecting the axial movement of the motor armature in the embodiments of this application;

[0026] Figure 2 for Figure 1 Schematic diagram of the middle positioning plate;

[0027] Figure 3 for Figure 1 Schematic diagram of the central shaft end connector;

[0028] Figure 4 This is a flowchart illustrating the detection method in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-Positioning assembly; 110-Positioning component; 111-First mounting hole; 112-First threaded hole; 120-Support component; 200-Axial force application assembly; 210-First force application component; 220-Second force application component; 230-Shaft end connector; 231-Shaft fixing part; 232-Force application mating part; 2321-Pull-up boss; 2321a-Second threaded hole; 2322-Abutting boss; 2322a-Positioning recess; 300-Motor bearing cover; 400-Motor armature shaft.

[0031] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. Other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are all within the scope of protection of this application.

[0033] It should be noted that the directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, and a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0036] The axial runout of the traction motor armature is a key indicator for evaluating the assembly quality and operational reliability of the traction motor. During factory testing and maintenance, the axial runout of the traction motor armature must be accurately measured to ensure that the transmission clearance meets specifications.

[0037] In related technologies, an axial force is applied to the armature shaft of the traction motor by manually using hammering and prying tools to cause axial displacement, and the displacement measurement instrument is used to read the value of the axial displacement.

[0038] However, the magnitude and speed of the force applied axially to the armature shaft of the traction motor by hand are uncontrollable, resulting in low accuracy of measurement data and poor consistency among multiple measurements.

[0039] To address the technical problem in related technologies where the magnitude and speed of the axial force manually applied to the armature shaft of a traction motor are uncontrollable, leading to low accuracy in measurement data and poor consistency across multiple measurements, this application provides an auxiliary device and method for detecting the axial movement of a motor armature. The auxiliary device for detecting the axial movement of the motor armature provided in this application provides a stable installation foundation and fixed reference for the detection process through a positioning component. The positioning component cooperates with the support component, and the support component is detachably connected to the bearing cap, which helps improve the overall stability during detection. The axial force application component consists of a first force application component, a second force application component, and a shaft end connector. The shaft end connector is detachably connected to the motor armature shaft and can drive the shaft to move in two opposite directions. During operation, the rotational drive of the first force application component and the rotation and axial feed of the second force application component drive the shaft end connector, thereby driving the axial movement of the motor armature.

[0040] This setting effectively solves the problem that the magnitude and speed of the force applied axially to the armature shaft of the traction motor by hand are uncontrollable, resulting in low accuracy of measurement data and poor consistency of multiple measurements. It achieves a smoother force application process and effectively improves the accuracy and consistency of measurement results.

[0041] The technical solution of the application will be described in detail below with reference to the accompanying drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0042] First, let me explain the terms used in this application:

[0043] Motor bearing cover: A motor bearing cover is a disc or annular cover plate that is installed on the outer side of the bearing chamber of the motor end cover and fitted onto the rotating shaft.

[0044] The armature shaft of a motor refers to the core drive shaft of the rotor of a DC motor, synchronous motor, or traction motor. The armature windings are all fixed on the shaft and rotate with the shaft to output torque.

[0045] like Figures 1 to 3 As shown, a first aspect of the embodiments of this application provides an auxiliary device for detecting the axial movement of a motor armature, comprising: a positioning assembly 100, the positioning assembly 100 including a positioning member 110 and a support member 120 connected to the positioning member 110, the support member 120 being detachably connected to a motor bearing cover 300; and an axial force application assembly 200, the axial force application assembly 200 including a first force application member 210, a second force application member 220, and a shaft end connector 230 respectively connected to the first force application member 210 and the second force application member 220, the shaft end connector 230 being used for connecting to the motor armature. The rotating shaft 400 is detachably connected. The first force-applying member 210 is inserted into the positioning member 110 and rotatably connected to the shaft end connector 230. The second force-applying member 220 is inserted into the positioning member 110 and abuts against the shaft end connector 230. The first force-applying member 210 is configured to drive the shaft end connector 230 to move along a first axial direction by its own rotation. The second force-applying member 220 is configured to drive the shaft end connector 230 to move along a second axial direction opposite to the first axial direction by its own rotation and axial feed. The first axial direction is consistent with the axial direction of the motor armature rotating shaft 400.

[0046] In the auxiliary device for detecting the axial movement of the motor armature in this application embodiment, the auxiliary device includes a positioning component 100 and an axial force application component 200. Specifically, the positioning component 110 can be a plate-shaped, ring-shaped, or frame-shaped structure.

[0047] The positioning component 100 consists of a positioning element 110 and a support element 120. One end of the support element 120 is connected to the positioning element 110, and the other end is detachably connected to the motor bearing cover 300. The positioning element 110 is provided with holes for force-applying components to pass through or be installed. Specifically, the support element 120 can be a columnar component such as a positioning screw.

[0048] The axial force application assembly 200 includes a first force application member 210, a second force application member 220, and a shaft end connector 230. The shaft end connector 230 is detachably connected to the motor armature shaft 400. The first force application member 210 is inserted into the positioning member 110 and rotatably connected to the shaft end connector 230. The second force application member 220 is inserted into the positioning member 110 and abuts against the shaft end connector 230. The first force application member 210 drives the shaft end connector 230 to move along the first axial direction by rotation. The second force application member 220 drives the shaft end connector 230 to move along the opposite second axial direction by rotation and axial feed. Specifically, the first force application member 210 and the second force application member 220 can both be fastening bolts. The shaft end connector 230 can be made into a disc shape, and its outer dimensions are larger than the shaft connection area to form a stable force-bearing surface. The dimensions of each component can be matched and adjusted according to the motor model.

[0049] During operation, the positioning component 100 is first installed on the motor bearing cover 300 via the support component 120, aligning the device axis with the motor armature shaft 400. Then, the shaft end connector 230 is connected to the end of the shaft. During testing, the first force-applying component 210 is rotated, which, guided by the positioning component 110, drives the shaft end connector 230 and the shaft to move along the first axial direction. When reverse force is required, the second force-applying component 220 is rotated, which feeds into the positioning component 110 and abuts against the shaft end connector 230, converting the rotational motion into a reverse thrust, driving the shaft to move along the second axial direction. The two force-applying components are responsible for driving in both directions, with the shaft end connector 230 acting as an intermediate force transmission component to transmit the force to the shaft. The amount of axial movement can be read using a dial indicator.

[0050] The auxiliary device for detecting axial movement of the motor armature in this embodiment replaces the traditional manual tapping and prying with a mechanical feeding method. This solves the problem that the magnitude and speed of the force applied manually to the axial shaft of the traction motor armature are uncontrollable, resulting in low accuracy of measurement data and poor consistency of multiple measurements. It achieves a smoother force application process and effectively improves the accuracy and consistency of measurement results.

[0051] In addition to the aforementioned beneficial effects, the auxiliary device for detecting the axial movement of the motor armature in this application embodiment also has the following effects:

[0052] Since the weight of the motor armature is entirely supported by the bearings at both ends, uncontrollable forces applied axially to the armature shaft of the traction motor by human intervention can easily cause axial scratches or microscopic peeling on the bearing bearings and ball bearing surfaces. This can lead to bearing failures in the traction motor during long-term operation, thereby affecting the reliability of the traction motor's operation.

[0053] The auxiliary device for detecting axial movement of the motor armature provided in this application can counteract the uncontrollable axial external force on the motor armature shaft 400, prevent axial scratches and micro-peeling on the bearing stop and ball surface, avoid bearing failure problems under long-term operation, effectively improve the reliability of traction motor operation, extend the service life of motor bearings, and reduce maintenance failure costs.

[0054] like Figures 1 to 2 As shown, the positioning member 110 is further provided with a first mounting hole 111 and a first threaded hole 112. The first force-applying member 210 passes through the first mounting hole 111 and is threadedly connected to the shaft end connector 230; the second force-applying member 220 passes through the first threaded hole 112 and abuts against the shaft end connector 230.

[0055] During operation, the positioning component 100 is first installed on the bearing cap, and the shaft end connector 230 is connected to the end of the rotating shaft. During testing, the first force-applying component 210 is rotated, and it is guided and constrained within the first mounting hole 111. Relying on the threaded engagement, it drives the shaft end connector 230 and the rotating shaft to move axially, achieving unidirectional force application. When reverse adjustment is required, the second force-applying component 220 is rotated, and it gradually feeds along the threaded channel of the first threaded hole 112, pushing the shaft end connector 230 to move in the opposite direction. The first force-applying component 210 undertakes threaded transmission and guiding engagement, while the second force-applying component 220 undertakes axial pushing and position compensation. The arrangement of the two on the positioning component 110 makes it easy to keep the force application center aligned with the axis of the rotating shaft.

[0056] The auxiliary device for detecting axial movement of the motor armature in this embodiment replaces manual knocking and prying with threaded transmission and axial pushing, reducing the common off-center load and impact during the force application process, and making the axial reciprocating movement of the armature more stable and controllable.

[0057] As a result, the repeatability and consistency of axial displacement are improved, and the fluctuation of test readings is reduced; the risk of bearings and mating parts being subjected to additional impact loads is reduced, and both maintenance efficiency and the reliability of test data are improved.

[0058] It should be understood that the above examples are merely illustrative and not limiting. Any equivalent substitutions made to the positioning component 100, the force-applying component, or the connection method based on the concept of this application shall fall within the protection scope of this application.

[0059] like Figure 1 and Figure 3As shown, the shaft end connector 230 further includes a force-applying mating part 232, the force-applying mating part 232 is provided with a pull boss 2321, the pull boss 2321 is provided with a second threaded hole 2321a, the second threaded hole 2321a is used for threaded connection with the first force-applying member 210.

[0060] In the auxiliary device for detecting axial movement of the motor armature in this embodiment, the shaft end connector 230 is provided with a force-applying mating part 232. The force-applying mating part 232 includes a pull boss 2321, on which a second threaded hole 2321a is opened for threaded engagement with the end of the first force-applying member 210. The second force-applying member 220 passes through the positioning member 110 and abuts against the force-applying mating part 232.

[0061] Specifically, the pull boss 2321 serves as the main node for transmitting axial force, and its dimensions are set according to the force requirements to ensure thread engagement depth and coaxiality.

[0062] During operation, after the shaft end connector 230 is assembled with the end of the motor armature shaft 400, the end of the first force-applying component 210 is screwed into the second threaded hole 2321a. When the first force-applying component 210 is rotated, the threaded pair converts the rotation into axial displacement, generating a pulling force on the pulling boss 2321, which drives the shaft end connector 230 and the shaft to move axially. The reverse force is achieved by the pushing action of the second force-applying component 220.

[0063] The auxiliary device for detecting axial movement of the motor armature in this embodiment provides a clear force point and stable thread engagement conditions through the pull boss 2321. It exhibits good coaxial force application, minimal off-center loading and impact, and smooth and controllable axial force transmission. This structure transforms manual tapping and prying into a repeatable threaded force application method, improving force consistency and reading repeatability, reducing the risk of additional stress on assemblies, and enhancing the convenience and safety of maintenance operations.

[0064] like Figure 1 and Figure 3 As shown, the force-applying mating part 232 is further provided with an abutting boss 2322. The abutting boss 2322 has a positioning recess 2322a on the side facing the second force-applying member 220. The positioning recess 2322a is used for the end of the second force-applying member 220 to abut.

[0065] In the auxiliary device for detecting axial movement of the motor armature in this application embodiment, the second force-applying member 220 passes through the first threaded hole 112 of the positioning member 110, and its end abuts into the positioning recess 2322a during feeding. The positioning recess 2322a serves as an end positioning structure, enabling a stable point-to-surface or surface-to-surface contact relationship to be formed between the second force-applying member 220 and the shaft end connector 230.

[0066] Specifically, the positioning recess 2322a can be set as a conical, spherical or frustum-shaped recess, and the end of the second force-applying member 220 is correspondingly processed into a round or conical structure to ensure automatic alignment when the two come into contact.

[0067] During operation, the second force-applying component 220 rotates along the first threaded hole 112 and feeds axially. When its end contacts the abutment boss 2322, it is naturally guided by the positioning recess 2322a and forms a stable abutment, so that the axial thrust is evenly transmitted to the shaft end connector 230 along the axial direction. As the second force-applying component 220 continues to rotate, the shaft end connector 230 drives the rotating shaft to move along the second axial direction; during reverse detection, the first force-applying component 210 pulls or pushes in the opposite direction.

[0068] The auxiliary device for detecting axial movement of the motor armature in this embodiment of the application limits the end of the second force-applying member 220 to the center of force by positioning recess 2322a. During the contact process, it is not easy to deviate or slip, reducing instantaneous impact and local wear. The coaxiality of force application and movement stability are improved, and the armature reciprocating movement is more gradual and controllable.

[0069] like Figure 1 and Figure 3 As shown, the shaft end connector 230 further includes a shaft fixing part 231, which is used for threaded connection with the motor armature shaft 400.

[0070] In the auxiliary device for detecting axial movement of motor armature in this application embodiment, the axial length of the fixed part is set according to the force requirements to ensure sufficient engagement depth and avoid thread slippage during the application of force.

[0071] The auxiliary device for detecting axial movement of the motor armature in this embodiment uses a threaded connection to ensure high resistance to pull-out and axial movement between the shaft end connector 230 and the rotating shaft. This ensures reliable synchronization between the two when forces are applied in both directions, avoiding slippage, impact, and uneven loading common with manual tapping or pushing. The measurement process is more stable, the readings change continuously, and the repeatability and consistency of the test results are improved. Furthermore, the threaded connection facilitates quick disassembly after testing, making it suitable for repeated use with different motor models, and offering good versatility and ease of maintenance.

[0072] like Figure 1 As shown, both the first force-applying component 210 and the second force-applying component 220 are fastening bolts.

[0073] The auxiliary device for detecting axial movement of motor armature in this embodiment of the application sets both the first force-applying component 210 and the second force-applying component 220 to be fastening bolts, which makes the measurement process of axial movement of motor armature more stable, the reading changes more continuous, and the repeatability and consistency of the detection results improved.

[0074] like Figure 3As shown, the shaft end connector 230 is further disc-shaped.

[0075] In the auxiliary device for detecting axial movement of motor armature in this application embodiment, the shaft end connector 230 is generally in the shape of a disc. Specifically, the outer diameter of the disc is set according to the force application requirements. The central connecting part and the peripheral boss form an overall force transmission path through the disc body. The position of the boss is arranged circumferentially to ensure symmetrical force. Furthermore, the thickness of the disc and the size of the boss can be adjusted according to different shaft diameters and load requirements.

[0076] During operation, the disc is connected to the end of the motor armature shaft 400 via the central shaft fixing part 231. After assembly, the disc body is in a force-bearing engagement state relative to the positioning part 110. When the first force-applying part 210 rotates, it pulls the disc and shaft to one side through the threaded interface on the pull boss 2321. When the second force-applying part 220 rotates and feeds axially, it applies a reverse thrust to the disc through the abutting boss 2322, pushing the disc and shaft to move in opposite directions. A stable force transmission path is formed between the central connecting part and the peripheral force-applying part through the disc body, and both positive and negative forces act axially on the shaft.

[0077] The auxiliary device for detecting axial movement of motor armature in this embodiment uses a disc-shaped structure to make the circumferential force distribution uniform and the force transmission path between the center and the periphery stable. During the axial reciprocating drive, the force on the shaft is more easily kept in the axial direction, reducing the influence of skew, sway and local compression on the measurement results. Changes in movement can be stably captured by the detection tool.

[0078] like Figure 1 As shown, the support member 120 further includes at least two support columns, one end of which is threaded to the bearing cover of the motor, and the other end of which is threaded to the positioning member 110.

[0079] In the auxiliary device for detecting axial movement of the motor armature according to this application embodiment, the support member 120 includes at least two support columns. One end of each support column is threaded for engaging with a threaded hole on the motor bearing cover 300, and the other end is also threaded for connecting with a corresponding threaded hole on the positioning member 110. The at least two support columns are spaced apart along the direction of the positioning member 110 and are located on both sides of the axial force application component 200, so that the positioning member 110 is stably installed on the outside of the bearing cover in a multi-point support manner.

[0080] Specifically, the support column can be a positioning screw, the length of which is selected according to the distance between the bearing cover and the positioning part 110, and the screw diameter and thread specification are determined according to the force requirements to ensure sufficient support rigidity; multiple support columns are arranged symmetrically or evenly in space to make the positioning part 110 bear the force evenly.

[0081] During operation, align one end of each support column with the threaded hole on the bearing cap and screw it in to secure it. Then connect the other end of the support column to the corresponding threaded hole on the positioning component 110, so that the positioning component 110 is stably installed in a multi-point support manner. Subsequently, assemble the axial force application component 200 onto the positioning component 110 and connect it to the motor armature shaft 400.

[0082] The auxiliary device for detecting axial movement of motor armature in this embodiment forms a multi-point support structure through multiple support columns. The positioning component 110 has high installation rigidity and positional accuracy. During the detection process, it can effectively counteract reaction force and off-center load, reduce the shaking of the positioning component 110 relative to the bearing cover, and make the axial movement of the shaft end connector 230 more stable.

[0083] like Figures 1 to 2 As shown, in some embodiments, at least two support columns are spaced apart along the direction of the positioning member 110, and at least two support columns are located on both sides of the axial force application assembly 200.

[0084] And / or, the support column is a positioning screw.

[0085] In the auxiliary device for detecting axial movement of the motor armature in this embodiment, at least two support columns are provided, arranged at intervals along the direction of the positioning member 110, and respectively located on both sides of the axial force application component 200, forming a surrounding support for the axial force application component 200. One end of the support column is threaded to the motor bearing cover 300, and the other end is threaded to the positioning member 110.

[0086] During operation, the two ends of the support column are screwed and fixed to the bearing cap and the positioning component 110 respectively, so that the positioning component 110 is stably installed under the constraint of the support on both sides. During the testing process, the first force-applying component 210 and the second force-applying component 220 drive the shaft end connector 230 under the guidance of the positioning component 110.

[0087] The auxiliary device for detecting axial movement of motor armature in this embodiment forms a stable support frame through support columns arranged at intervals on both sides. The positioning member 110 is not easy to tilt or twist during the application of force, and the force state of the shaft end connector 230 and the rotating shaft is more uniform, reducing measurement errors caused by off-center load, eccentricity or local deformation.

[0088] The auxiliary device for detecting axial movement of motor armature in this embodiment adopts a positioning screw with adjustable extension, which is convenient to adapt to different motor structures, easy to install and disassemble, and has good installation adaptability and consistency of repeated measurements. The repeatability, stability and safety of the detection are all improved.

[0089] like Figure 1 and Figure 4As shown, a second aspect of this application provides a detection method, including an auxiliary device for detecting the axial movement of a motor armature according to any of the above embodiments. The detection method includes the following steps:

[0090] First, it should be noted that, for ease of description, the direction from the shaft end connector 230 to the positioning member 110 is defined as the first direction, and the direction opposite to the first direction is defined as the second direction.

[0091] S101: Install the support 120 onto the motor bearing cover 300, then install the positioning part 110 onto the support 120, and adjust the positioning part 110 so that its axis is coaxial with the motor armature shaft 400.

[0092] Specifically, the support 120 can be detachably fixed to the motor bearing cover 300 by multiple fastening bolts. When adjusting the coaxial alignment, the alignment can be adjusted by observing the position of the center of the positioning part 110 and the position of the end of the motor armature shaft 400, or by using a dial indicator for fine adjustment to ensure that the axes of the two coincide, so as to avoid radial off-center load when force is applied later.

[0093] S102: Install the shaft end connector 230 onto the motor armature shaft 400.

[0094] Specifically, the shaft end connector 230 has an internal threaded hole at its center, which is screwed into and fixed to the external thread at the end of the motor armature shaft 400; or, the shaft end connector 230 is clamped and fixed to the smooth shaft section of the motor armature shaft 400 by a lateral set screw (set screw). This connection must ensure that it does not fall off or slip relative to each other when subjected to bidirectional axial force.

[0095] S103: Rotate the first force-applying member 210, drive the shaft end connector 230 to move along the first axis, so as to apply an axial force in the first direction (i.e. close to the positioning member 110) to the motor armature shaft until the motor armature shaft 400 can no longer move.

[0096] Specifically, the first force-applying component 210 is preferably a bolt. During operation, a tool is used to rotate the bolt, causing it to pull the shaft end connector 230. When the bearing or mechanical limiting structure inside the motor armature shaft 400 reaches force balance or mechanical limit, the motor armature shaft 400 stops moving, that is, it reaches a state where it cannot be displaced.

[0097] S104: Place the dial indicator probe against the 400 end of the motor armature shaft and zero it.

[0098] Specifically, the dial indicator body is rigidly fixed by a magnetic base or a special clamp (the fixed position of the dial indicator is not limited here). It can be fixed on the motor bearing cover 300, so that the probe of the dial indicator is perpendicular to the center of the end face of the armature shaft 400. Then, the dial indicator is rotated so that the pointer is aligned with the "0" mark to complete the zeroing.

[0099] S105: Rotate the second force-applying member 220, drive the shaft end connector 230 to move along the second axis, so as to apply an axial force to the armature shaft in the second direction (i.e. away from the positioning member 110) opposite to the first direction until the motor armature shaft 400 can no longer move.

[0100] Specifically, the second force-applying component 220 is preferably a bolt. Before operating the second force-applying component 220, the first force-applying component 210 must be loosened by rotating it in the opposite direction to release the axial tension it applies (to prevent structural interference and jamming). Subsequently, the jacking bolt is rotated so that its end pushes the shaft end connector 230 to move in the second direction until the motor armature shaft 400 reaches force balance or mechanical limit in the opposite direction.

[0101] S106: After the dial indicator pointer stabilizes, record the dial indicator reading. Based on the dial indicator reading, obtain the axial movement of the motor armature.

[0102] Specifically, after the dial indicator pointer stops swinging, read the number of divisions the pointer deviates from the zero mark. The obtained value is the axial movement of the motor armature shaft 400. If a digital dial indicator or displacement sensor is used, the value on the display screen is directly read as the axial movement.

[0103] It is understood that the execution order of the above steps is not the only limitation of this application. Without departing from the essential technical solution of this application, the execution order of steps S3 and S5 can be interchanged (i.e., first apply the second directional force and zero the dial indicator, then apply the first directional force and take the reading); in addition, step S4 (installation and zeroing of the dial indicator) can also be adjusted to be performed before step S2 or before step S3 according to the actual assembly space and testing requirements, and these are all within the protection scope of this application.

[0104] The auxiliary device and method for detecting axial movement of the motor armature in this application replace the traditional manual tapping and prying with mechanical feeding, which solves the problem that the magnitude and speed of the force applied manually to the axial shaft of the traction motor armature are uncontrollable, resulting in low accuracy of measurement data and poor consistency of multiple measurements. It achieves a smoother force application process and effectively improves the accuracy and consistency of measurement results.

[0105] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An auxiliary device for detecting the axial movement of a motor armature, used for detecting the axial movement of a motor armature, characterized in that, The auxiliary device for detecting axial movement of the motor armature includes: A positioning assembly (100) includes a positioning element (110) and a support element (120) connected to the positioning element (110), the support element (120) being detachably connected to a motor bearing cover (300); An axial force application assembly (200) includes a first force application member (210), a second force application member (220), and a shaft end connector (230) connected to the first force application member (210) and the second force application member (220) respectively. The shaft end connector (230) is used for detachable connection with the motor armature shaft (400). The first force application member (210) is inserted into the positioning member (110) and rotatably connected to the shaft end connector (230). The second force application member (220) is inserted into the positioning member (110) and abuts against the shaft end connector (230). The first force-applying member (210) is configured to drive the shaft end connector (230) to move along a first axial direction by its own rotation, and the second force-applying member (220) is configured to drive the shaft end connector (230) to move along a second axial direction opposite to the first axial direction by its own rotation and axial feed, wherein the first axial direction is consistent with the axial direction of the motor armature shaft (400).

2. The auxiliary device for detecting axial movement of the motor armature according to claim 1, characterized in that, The positioning member (110) is provided with a first mounting hole (111) and a first threaded hole (112). The first force-applying member (210) passes through the first mounting hole (111) and is threadedly connected to the shaft end connector (230). The second force-applying member (220) passes through the first threaded hole (112) and abuts against the shaft end connector (230).

3. The auxiliary device for detecting axial movement of the motor armature according to claim 2, characterized in that, The shaft end connector (230) includes a force-applying mating part (232), which is provided with a pull boss (2321). The pull boss (2321) is provided with a second threaded hole (2321a), which is used to thread the first force-applying component (210).

4. The auxiliary device for detecting axial movement of the motor armature according to claim 3, characterized in that, The force-applying mating part (232) is also provided with an abutting boss (2322). The abutting boss (2322) has a positioning recess (2322a) on the side facing the second force-applying member (220). The positioning recess (2322a) is used for the end of the second force-applying member (220) to abut.

5. The auxiliary device for detecting axial movement of the motor armature according to claim 2, characterized in that, The shaft end connector (230) also includes a shaft fixing part (231), which is used to be threadedly connected to the motor armature shaft (400).

6. The auxiliary device for detecting axial movement of an electric motor armature according to any one of claims 1-5, characterized in that, Both the first force-applying component (210) and the second force-applying component (220) are fastening bolts.

7. The auxiliary device for detecting axial movement of an electric motor armature according to any one of claims 1-5, characterized in that, The shaft end connector (230) is disc-shaped.

8. The auxiliary device for detecting axial movement of an electric motor armature according to any one of claims 1-5, characterized in that, The support member (120) includes at least two support columns, one end of which is threaded to the bearing cover of the motor, and the other end of which is threaded to the positioning member (110).

9. The auxiliary device for detecting axial movement of the motor armature according to claim 8, characterized in that, The at least two support columns are spaced apart along the direction of the positioning member (110), and the at least two support columns are located on both sides of the axial force application component (200); And / or, the support column is a positioning screw.

10. A method for detecting the axial movement of an electric motor armature, characterized in that, The method using the auxiliary device for detecting axial movement of an electric motor armature as described in any one of claims 1 to 9 includes the following steps: The support member (120) is installed on the motor bearing cover (300); The shaft end connector (230) is installed on the motor armature shaft (400). The first force-applying member (210) is rotated to drive the shaft end connector (230) to move along the first axial direction, so as to apply an axial force in the first direction to the motor armature shaft (400) until the motor armature shaft (400) can no longer move; Place the dial indicator probe against the end of the motor armature shaft (400) and zero it; The second force-applying member (220) is rotated to drive the shaft end connector (230) to move along the second axis, so as to apply an axial force in the second direction opposite to the first direction to the armature shaft until the motor armature shaft (400) can no longer move; After the dial indicator pointer stabilizes, record the dial indicator reading. Based on the dial indicator reading, obtain the axial movement of the motor armature.

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