An automatic detection system and detection method for stepping motor

Abstract

The invention relates to the technical field of stepper motor detection, and in particular to an automatic detection system and a detection method for stepper motors, which solve the shortcomings of the prior art. The automatic detection system comprises a test frame, a test mechanism, a docking mechanism and an adjustment mechanism. The test frame comprises an upper frame and a lower frame connected as one by a plurality of pillars. A control terminal with a PLC controller is installed on the top surface of the upper frame. A motor to be tested is installed between the upper frame and the lower frame. An output shaft is installed on the output end of the motor to be tested, and a keyway is provided on the output shaft. Compared with the prior art, the invention can not only realize the simulation test of the stability performance of the motor output shaft, and amplify the result to improve the convenience of observation, but also improve the automation degree of docking the external shaft and the output shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of stepper motor detection, and in particular to an automatic detection system and a detection method for a stepper motor. Background Art

[0002] A stepper motor is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The angular displacement or linear displacement output is proportional to the number of input pulses, and the speed is proportional to the pulse frequency. In addition, stepper motors have the advantages of simple structure, easy use and maintenance, low manufacturing cost, and large load inertia capacity, and are suitable for small and medium-sized machine tools and places where speed accuracy requirements are not high.

[0003] The stable performance of the output shaft of a stepper motor is one of the key factors to ensure the normal operation of the motor and extend its service life. However, in actual work, the output shaft is prone to vibration due to internal factors of the motor or external environmental factors, which affects the stable performance between the output shaft and the motor. During the detection process, in order to connect the output shaft and the detection equipment as much as possible, it is necessary to use an external shaft. However, the installation of the external shaft in existing equipment requires manual assembly, and the degree of automation of the assembly is low. Therefore, it is easy to cause inconvenience during the assembly process due to some factors of the equipment parts, and the assembler may be injured. In addition, during the detection process, the vibration amplitude of the motor output shaft is also not easy to detect.

[0004] Therefore, it is necessary to provide an automatic detection system and a detection method for a stepper motor to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide an automatic detection system and a detection method for a stepper motor to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An automated testing system for a stepper motor comprises a test frame, a test mechanism, a docking mechanism and an adjustment mechanism, wherein the test frame comprises an upper frame and a lower frame connected as a whole by a plurality of pillars, a control terminal with a PLC controller is installed on the top surface of the upper frame, a motor to be tested is installed between the upper frame and the lower frame, an output shaft is installed on the output end of the motor to be tested, and a key slot is provided on the output shaft;

[0008] The test mechanism comprises a fixing frame 1, an amplitude component, an elastic component and an amplifying component. The fixing frame 1 is mounted on the top surface of the upper frame, the amplitude component is mounted below the fixing frame 1, and fixing seats are mounted on both sides of the vertical side walls of the fixing frame 1. The fixing seat and the amplitude component are mounted with the elastic component for transmitting the vibration generated by the output shaft at the same frequency. The amplifying component is mounted between the elastic component and the fixing seat on one side. The amplifying component moves with the swing of the elastic component, and then the detection result is made significant by amplifying the swing angle.

[0009] An external shaft is provided at the input position of the amplitude component, an inner groove is provided on one end of the external shaft facing the output shaft, a key pin connected to the external shaft is provided on the inner wall of the inner groove, and the key pin is adapted to the key groove;

[0010] The docking mechanism is arranged between the external shaft and the output shaft, and the docking mechanism includes a positioning component, a limiting component and a moving component. A "U"-shaped limiting frame is installed on the lower chassis, and the moving component reciprocates between the side walls of the limiting frame in a straight line direction. A fixed ring 1 arranged along its length direction is arranged on the moving component, and a rotating ring is rotatably arranged between the inner walls of the fixed ring 1. A positioning component is arranged on one side of the rotating ring to locate the position of the key pin, and a limiting component is arranged on the other side of the rotating ring to locate the key slot. The positioning component is synchronously connected with the limiting component and can be rotated and adjusted synchronously with the rotating ring;

[0011] The adjustment mechanism is installed on the lower frame, and is provided with a fixing ring 2 which can reciprocate along the length direction of the test frame. When one end of the circumscribed shaft passes through the fixing ring 2, the end of the circumscribed shaft can be fixed at the middle position of the fixing ring 2 and drive the circumscribed shaft to dock with the output shaft.

[0012] In one embodiment, the amplitude assembly includes a collar, a guide shaft, and a lifting sleeve;

[0013] The fixing frame 1 is arranged in a "U"-shaped structure, a through hole 1 is opened on the upper frame, the top end of the guide shaft is fixed in the middle of the bottom wall of the fixing frame 1, and the lifting sleeve is slidably arranged on the outer wall of the guide shaft;

[0014] Two fixing plates 1 are installed on the side wall of the fixing seat facing the amplitude component, and two fixing plates 2 are installed at two relative positions on the outer wall of the lifting sleeve. The elastic component includes a fixing cylinder, a piston shaft and a piston plate. One end of the piston shaft is connected to the piston plate as a whole. The piston plate is elastically slidably arranged between the inner walls of the fixing cylinder. A "T"-shaped connecting part is installed on one end of the fixing cylinder. The connecting part is connected between the two fixing plates 1 on the same fixing seat through an axis. The other end of the piston shaft is located outside the fixing cylinder and is connected between the two fixing plates 2 on the same side through an axis.

[0015] In one embodiment, the amplification assembly includes a dial, a swing arm 1, and a swing arm 2;

[0016] Two swing arms are symmetrically arranged and are rotatably arranged on the side walls of the same fixed seat through shaft connection. A fixing groove is arranged along the length direction of the swing arm on one side of the side wall. Two driving shafts arranged opposite to each other are installed on the outer wall of the fixing cylinder on one side. The other end of the driving shaft slides between the inner walls of the fixing groove, and a connecting shaft is installed between one end of the swing arms on both sides.

[0017] A connecting strip is installed on the bottom wall of the upper frame, and the dial is installed between the top wall of the connecting strip and the side wall of the fixing frame;

[0018] A connecting seat is installed on one side wall of the upper frame, and two swing arms are symmetrically arranged, and their ends are rotatably arranged on the side walls of the connecting seat in a coaxial connection manner. An indicator mark is fixedly installed between the other ends of the swing arms on both sides through an axis, and the indicator mark moves on one side surface of the dial, and a through hole is opened on the swing arm along its length direction. The connecting shaft passes through and can move and adjust along the inner wall of the through hole.

[0019] In one embodiment, the moving assembly includes a moving frame, a moving seat 1 and a fixing ring 1;

[0020] The movable frame is arranged in a rectangular frame structure, and a linear motor is connected to one side of the movable frame. The movable seat 1 is slidably arranged between the inner walls of the movable frame by means of threaded transmission. The fixed ring 1 is installed on the top surface of the movable seat 1, and an integral convex seat is arranged on the side wall of the fixed ring 1. A driving gear is rotatably arranged on one side of the convex seat, and the driving gear is meshed with the rotating ring for transmission.

[0021] In one embodiment, the positioning assembly includes a fixing plate, an adjustment block and an adjustment handle;

[0022] A groove is provided on the side wall of the rotating ring facing the testing mechanism, and a plurality of clamping members 1 are evenly arranged in the groove. An electric push rod 1 is installed on the outer wall of the rotating ring on one side of the clamping member 1;

[0023] One end of the fixed plate is fixed to the side wall of the groove, and an adjusting block is slidably arranged along the length direction of the fixed plate, and one side of the adjusting block is provided with an electric push rod two connected and driven therewith in the fixed plate, and protrusions connected therewith are provided on the top wall and the bottom wall of the adjusting block, and two adjusting handles are provided on the side wall of the fixed plate facing the groove through coaxial rotation, and a limit block connected therewith is installed on the adjusting handle, and one side wall of the limit block is a plane, and a threaded shaft is threadedly connected to one side wall of the adjusting handle, and a movable handle is provided on the side wall of the protrusion through an axis connection, and the other end of the movable handle is connected to the other end of the threaded shaft and they are arranged in a rotationally connected manner;

[0024] An extension shaft is installed on the other end of the fixed plate, and a moving block 1 is slidably arranged on the extension shaft. Fixed arms are installed on the opposite side walls of the moving block 1. A fixed groove 3 is also opened on the adjusting handle along its length direction. A synchronous shaft is installed on the fixed arm, and the other end of the synchronous shaft is slidably arranged along the inner wall of the fixed groove 3.

[0025] In one embodiment, the limit assembly includes a movable bar and a spring key;

[0026] The movable bar is arranged in an "L"-shaped structure, a linkage shaft is connected between the moving block 1 and the side wall of the movable bar, and a fixing groove 4 and a fixing groove 5 are respectively opened on the adjacent side walls of the movable bar, the fixing groove 4 is arranged along the width direction of the movable bar, and the fixing groove 5 is arranged along the length direction of the movable bar, and a slider is elastically slidably arranged between the inner walls of the fixing groove 4 along the length direction thereof, and the slider is fixed on one end of the spring key;

[0027] A limit strip is installed on the bottom wall of the fixed groove five, and a moving block two is slidably arranged along the inner wall of the fixed groove five on one side of the limit strip, and a guide wheel is rotatably arranged between the inner walls of the fixed groove five on the other side of the limit strip, and a pull rope which never separates from the guide wheel is arranged on the guide wheel, and one end of the pull rope is fixed on the side wall of the moving block two, and the other end of the pull rope is fixed on the side wall of the spring key, wherein an electric push rod three is installed between the inner walls of the fixed groove five, and an adsorption sheet is arranged on the movable end of the electric push rod three, and a positioning groove matching with the adsorption sheet is opened on the side wall of the moving block two facing the electric push rod three, and an electric suction cup is embedded in the positioning groove, and the electric suction cup and the adsorption sheet can be connected and fixed together by suction;

[0028] A guide block is slidably arranged between the inner walls of the rotating ring, one end of the guide block is connected with a movable plate, a through hole three is opened on the movable plate, the linkage shaft passes through the through hole three and can be slidably arranged along the inner wall of the through hole three.

[0029] In one embodiment, when the clamping member 1 contacts the outer surface of the circumscribed shaft, the circumscribed shaft is located at the middle position of the rotating ring, and the end of the circumscribed shaft contacts the side wall of one of the adjusting handles;

[0030] When the adjusting handles on both sides move toward each other driven by the adjusting blocks, the planes of the two limit blocks can contact the side walls of the key pins respectively during the movement. During the movement of the adjusting handles, the synchronous shaft also synchronously controls the moving block 1 to make a linear movement on the extension axis, so that the movable bar also moves synchronously with the moving block 1, and the center line of the movable bar along its height direction always falls within the plane where the angular bisectors of the two adjusting handles are located.

[0031] When the limit block contacts the key pin, the suction force between the moving block 2 and the adsorption sheet disappears, and the spring key is bounced to a position in contact with the outer surface of the output shaft. Thereafter, in the process of the rotating ring rotating and adjusting with the driving gear, the spring key and the outer surface of the output shaft are in a state of linear contact rotation. When the spring key moves to the key slot position, the spring key is embedded in the key slot under the action of elasticity. At this time, the key pin and the key slot are already in an aligned state.

[0032] In one embodiment, the adjustment mechanism includes a second fixing frame, a second moving seat, a second fixing ring, a second clamping member, and a beam-type infrared sensor. The second fixing frame is a rectangular frame structure and is mounted on the lower frame. The second moving seat moves between the inner walls of the second fixing frame by means of a threaded transmission. The second fixing ring is mounted above the middle of the top wall of the second moving seat by means of a support. A plurality of second clamping members are evenly arranged in the middle of the second fixing ring. One side of the second clamping member is mounted on the outer wall of the second fixing ring and is driven by an electric push rod four connected thereto.

[0033] The through-beam infrared sensor is installed at a relative position on the two side walls of the fixed ring. When one end of the mobile frame moves to contact the end of the limit frame away from the motor to be tested, one end of the external shaft passes through the through-beam infrared sensor, and the signal of the through-beam infrared sensor is disconnected. Then, the external shaft is fixed between the side walls of several clamping parts.

[0034] A detection method for an automated detection system for a stepper motor comprises the following steps:

[0035] S1. First, pass the circumscribed shaft through the shaft ring and extend it to a position where it contacts the adjusting handle located on the outside, and make the key pin and the key slot located in the direction of the same side;

[0036] S2. Next, the angular position of the adjusting handle is adjusted so that the adjustment stops when the limit block rotates to contact the key pin in the circumscribed shaft. At this time, the limit blocks on the two adjusting handles contact the side walls of the key pin respectively. At the same time, the movable bar moves synchronously with the movement of the adjusting handle, and the spring key on the movable bar moves to the position in contact with the output shaft under the action of the elastic force. Subsequently, the end of the circumscribed shaft is clamped and fixed by the clamping member.

[0037] S3, then, the rotating ring is adjusted in angle rotation, so that the movable bar moves in a circle around the output shaft, and at the same time, the spring key and the output shaft always maintain a linear contact motion state, until the spring key moves to the key slot position, the spring key is embedded in the key slot and the angle adjustment stops, at this time, the key pin and the key slot are in an aligned state;

[0038] S4, then, keep the connection state between the rotating ring and the circumscribed shaft unchanged, and move and adjust to one side of the adjustment mechanism until the circumscribed shaft passes through the adjustment mechanism and disconnects the signal of the through-beam infrared sensor, thereby triggering the clamping member 2 to clamp and fix the other end of the circumscribed shaft, and then, the docking mechanism is reset and moved to the other end of the mobile frame along the width direction of the test frame;

[0039] S5. Finally, the adjusting mechanism drives the external shaft to move toward one side of the output shaft again along the aligned line. When the movable seat 2 moves to the other end of the fixed frame 2, the key pin on the external shaft is just embedded in the key slot. Then, the clamp 2 and the adjusting mechanism are reset to start the motor to be tested. The stable performance of the output shaft is transmitted through the external shaft, and the amplitude change degree is amplified by the testing mechanism.

[0040] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0041] 1. By setting up an external shaft and a test mechanism, one end of the external shaft is connected to the output shaft for synchronization, and the other end of the external shaft is placed through the test mechanism, so that the vibration of the output shaft is synchronously reflected by the vibration of the external shaft, and the vibration amplitude is amplified in the form of angle swing through the test mechanism to improve the significance of the test.

[0042] 2. A docking mechanism is provided between the circumscribed shaft and the output shaft, and an adjustment mechanism is provided on the other side of the circumscribed shaft. The key pin on the circumscribed shaft is positioned by the docking mechanism so that it is on the same straight line as the keyway on the output shaft. The docking mechanism is then shifted and adjusted. Finally, the adjustment mechanism drives the circumscribed shaft to move along the aligned route, so that the key pin of the circumscribed shaft is matched with the keyway on the output shaft.

[0043] In summary, the present invention can not only realize the simulation test of the stability performance of the motor output shaft and amplify the result to improve the convenience of observation, but also improve the automation degree of docking the external shaft and the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0045] In the attached picture:

[0046] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 yes Figure 1 A schematic diagram of the structure from another perspective;

[0048] Figure 3 It is a structural schematic diagram of the circumscribed shaft and the output shaft of the present invention;

[0049] Figure 4 It is a schematic diagram of the installation of the testing mechanism of the present invention;

[0050] Figure 5 It is a longitudinal cross-sectional schematic diagram of the test mechanism of the present invention (excluding the dial and the connecting strip);

[0051] Figure 6 It is a schematic diagram of the installation of the docking mechanism of the present invention;

[0052] Figure 7 yes Figure 6 A schematic diagram of a top view structure;

[0053] Figure 8 It is a connection diagram of the mobile frame, the rotating ring and its auxiliary components of the present invention;

[0054] Fig. 9 It is a schematic diagram of the overall structure of the rotating ring and its accessory components of the present invention;

[0055] Fig.10 yes Fig. 9 Another perspective structural diagram of;

[0056] Fig.11 It is a schematic diagram of the structure of the auxiliary components on the rotating ring of the present invention;

[0057] Fig.12 yes Fig.11 Another perspective structural diagram of;

[0058] Fig.13 It is a schematic diagram of the regulating mechanism of the present invention.

[0059] In the figure: 1. test stand; 11. control terminal; 2. motor to be tested; 21. output shaft; 211. keyway; 3. external shaft; 31. key pin; 4. test mechanism; 41. fixed stand 1; 411. guide shaft; 412. fixed seat; 42. shaft ring; 421. lifting sleeve; 43. elastic component; 431. fixed cylinder; 432. piston shaft; 433. piston plate; 44. dial; 441. connecting strip; 45. swing arm 1; 451. connecting shaft; 452. driving shaft; 46. swing arm 2; 461. indicator; 462. connecting seat; 5. docking mechanism; 51. moving stand; 511. moving seat 1; 52. fixed ring 1; 5 21. Driving gear; 53. Rotating ring; 531. Groove; 532. Clamping piece 1; 54. Fixed plate; 541. Adjusting block; 5411. Movable handle; 542. Adjusting handle; 5421. Limiting block; 543. Extension shaft; 55. Moving block 1; 551. Fixed arm; 552. Synchronous shaft; 56. Movable plate; 561. Guide block; 57. Movable bar; 571. Spring key; 572. Moving block 2; 573. Guide wheel; 574. Limiting bar; 58. Linkage shaft; 59. Limiting frame; 6. Adjusting mechanism; 61. Fixed frame 2; 62. Moving seat 2; 63. Fixed ring 2; 64. Clamping piece 2; 65. Through-beam infrared sensor. DETAILED DESCRIPTION

[0060] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0061] like Figure 1-3 As shown, the present invention provides a technical solution: an automated detection system for a stepper motor, comprising a test frame 1, a test mechanism 4, a docking mechanism 5 and an adjustment mechanism 6, the test frame 1 is divided into an upper frame and a lower frame, a plurality of pillars are installed between the upper frame and the lower frame for connecting and fixing the two, and a mounting groove is provided on the lower frame, a lower fixing bar is installed on one side of the mounting groove on the lower frame by screws, and an upper fixing bar is also installed on the upper frame by screws, the upper fixing bar and the lower fixing bar are arranged opposite to each other, a motor 2 to be tested is installed in the mounting groove, and one end of the motor 2 to be tested is fixed between the upper fixing bar and the lower fixing bar by bolts, in addition, a control terminal 11 with a built-in PLC controller is also installed on the upper frame, and a through hole 1 is provided on the upper frame.

[0062] The output end of the motor 2 to be tested is provided with an output shaft 21, and a key slot 211 is provided on the output shaft 21. Figure 6 In the horizontal left position shown.

[0063] A testing mechanism 4 is arranged above the through hole 1, and an external shaft 3 is arranged on the input end of the testing mechanism 4. An inner groove is opened in one end of the external shaft 3, and a key pin 31 connected with the external shaft 3 as a whole is arranged on the inner wall of the inner groove. The key pin 31 is matched with the key groove 211. The output end of the testing mechanism 4 is arranged outside the test frame 1, and the stability performance of the output shaft 21 of the stepping motor is reflected by the change of the angle swing.

[0064] A docking mechanism 5 is provided between the circumscribed shaft 3 and the output shaft 21, and an adjustment mechanism 6 is additionally provided on one side of the other end of the circumscribed shaft 3. The docking mechanism 5 is used to automatically complete the matching process of the key pin 31 and the key slot 211, so that the tester no longer needs to directly extend his hand into dangerous areas such as the test position for manual adjustment. After the docking is completed, the circumscribed shaft 3 is moved to the side away from the output shaft 21 to the position of the adjustment mechanism 6, and then the docking mechanism 5 is conveniently moved out of the test range. Subsequently, the adjustment mechanism 6 directly completes the final docking work according to the docked state.

[0065] like Figure 4-5 As shown, the testing mechanism 4 includes a fixing frame 41, an amplitude component, an elastic component 43 and an amplifying component;

[0066] The amplitude assembly includes a collar 42, a guide shaft 411 and a lifting sleeve 421;

[0067] The amplifying assembly includes a dial 44, a swing arm 1 45 and a swing arm 2 46;

[0068] The fixing frame 41 is in a "U"-shaped structure, and both ends of the fixing frame 41 are fixed to the upper frame by screws. The fixing seats 412 are fixed to the vertical side walls on both sides of the fixing frame 41 by screws, and a vertically arranged guide shaft 411 is fixed to the middle of the bottom wall of the fixing frame 41 by screws. A lifting sleeve 421 is slidably arranged on the outer wall of the guide shaft 411, and a shaft ring 42 fixed to the lifting sleeve 421 as a whole by screws is connected to the bottom end of the lifting sleeve 421, and the shaft ring 42 is adapted to the circumscribed shaft 3, and the circumscribed shaft 3 passes through the shaft ring 42.

[0069] Two fixing plates 1 are installed on the side wall of one side of the fixing seat 412 by screws, and two fixing plates 2 are installed at two relative positions on the outer wall of the lifting shaft sleeve 421 by screws. An elastic component 43 is connected between the fixing plates 1 and 2 opposite to each other on the same side. The elastic component 43 includes a fixing cylinder 431, a piston shaft 432 and a piston plate 433. The piston shaft 432 and the piston plate 433 are connected as a whole, and the piston plate 433 is slidably arranged along the inner wall of the fixing cylinder 431. A spring 1 is sleeved on the outer wall of the piston shaft 432. One end of the spring 1 is fixed to the inner wall of the fixing cylinder 431, and the other end is arranged in contact with the piston plate 433. A connecting part (the connecting part is a "T"-shaped structure) is welded on one end of the fixing cylinder 431. The connecting part is connected between the two fixing plates 1 on the same fixing seat 412 through an axis, and the end of the piston shaft 432 exposed outside the fixing cylinder 431 is consistent with the structure of the connecting part (its cross-sectional shape is as shown in FIG. Figure 5 As shown), the end of the piston shaft 432 is connected to the lifting sleeve 421 between two fixing plates 2 on the same side through an axis.

[0070] On both side walls of one of the fixed seats 412, swing arms 45 are rotatably connected by shafts, and fixing grooves 1 are opened on the opposite side walls of the swing arms 45 on both sides. The fixing grooves 1 are arranged along the length direction of the swing arms 45, and two driving shafts 452 arranged oppositely are welded on the outer wall of the fixed cylinder 431 located on the same side as the swing arm 45. The other end of the driving shaft 452 is slidably arranged between the inner walls of the fixing groove 1, and a connecting shaft 451 is installed between the other ends of the swing arms 45 on both sides in a threaded connection manner.

[0071] A connecting seat 462 is installed on one side wall of the upper frame by screws, and coaxially rotating swing arms 46 are arranged on the side walls of the connecting seat 462 by shaft connection. A through hole 2 is opened on the swing arm 46 along its length direction, and a connecting shaft 451 is arranged to penetrate the through hole 2 and slide along the inner wall of the through hole 2. An indicator mark 461 is fixedly installed between the other ends of the swing arms 46 on both sides by a shaft.

[0072] A connecting strip 441 is installed on the bottom wall of the upper frame by screws, and a dial 44 with an arc-shaped (1 / 4 ring) structure is installed between the connecting strip 441 and one side wall of the fixing frame 41 by screws, and the indicator 461 moves on one side surface of the dial 44.

[0073] It should be further explained that the external shaft 3 is connected to the output shaft 21 of the motor 2 to be tested, so that the stability of the external shaft 3 is synchronized with that of the output shaft 21, and the collar 42 is installed on the external shaft 3 and matches it, and the collar 42 is restricted by the lifting sleeve 421 and the guide shaft 411, so that the position of the collar 42 on the external shaft 3 does not change. However, when the output shaft 21 of the motor 2 to be tested vibrates, the external shaft 3 will vibrate synchronously, and the vibration amplitude of the collar 42 on the external shaft 3 will change accordingly.

[0074] When the shaft ring 42 vibrates, it drives the lifting sleeve 421 to move up and down along the outer wall of the guide shaft 411 in the vertical direction, so that the elastic components 43 on both sides move synchronously. When the elastic components 43 move due to the vibration, the elastic components 43 swing with the movement of the lifting sleeve 421 and the rotation center of the connecting part and the fixing plate 1 as the rotation center, so that the driving shaft 452 on one side of the fixing cylinder 431 moves synchronously with the movement of the elastic component 43, so that the other end of the driving shaft 452 can be between the inner wall of the fixing groove 1. Sliding adjustment is performed to enable the swing arm 45 to swing. As the swing arm 45 swings, the connecting shaft 451 at one end thereof slides between the inner walls of the through hole 2, thereby controlling the movement of the swing arm 2. The swing arm 2 is rotated and adjusted with the connection center between the connecting seat 462 and the swing arm 2 46 as the center. As the swing arm 2 46 moves, the indicator 461 continuously swings back and forth on the dial 44, and the swing amplitude of the elastic component 43 is magnified and displayed. Finally, the change in the swing range of the indicator 461 on the dial 44 during the test reflects the stability performance of the stepper motor output shaft 21.

[0075] like Figure 6-12 As shown, the docking mechanism 5 includes a rotating ring 53, a positioning assembly, a limiting assembly and a moving assembly;

[0076] The moving assembly includes a moving frame 51, a moving seat 511 and a fixing ring 52;

[0077] The positioning assembly includes a fixing plate 54, an adjusting block 541 and an adjusting handle 542;

[0078] The limit assembly includes a movable bar 57 and a spring key 571;

[0079] A linear motor is installed on one side wall of the lower fixed bar by screws, and a limit frame 59 with a "U"-shaped structure is installed on the lower base frame by screws, and a movable frame 51 is slidably arranged between the side walls of the limit frame 59 along the length direction of the test frame 1, and the movable frame 51 is connected and fixed to the motor shaft end of the linear motor, wherein, sensors 1 (not shown in the figure) connected to the PLC controller through electrical signals are embedded on the opposite inner walls on both sides of the limit frame 59, and the sensor 1 is located on the movement path of the movable frame 51.

[0080] The moving frame 51 is arranged in a rectangular frame structure, and a screw rod 1 is rotatably arranged between the inner walls of the moving frame 51, a rotating motor 1 for driving the screw rod 1 is installed on one end of the screw rod 1, and the rotating motor 1 is installed on the outer wall of the moving frame 51 by screws, and a moving seat 1 511 is slidably arranged between the inner walls of the moving frame 51, and sensors 2 (not shown in the figure) connected to the PLC controller through electrical signals are embedded on both ends of the moving seat 1 511, and the screw rod 1 penetrates the moving seat 1 511 and is arranged between the two by means of threaded transmission.

[0081] A fixing ring 52 is fixed on the top surface of the movable seat 511 by screws, and a convex seat connected to the fixing ring 52 is provided on the fixing ring 52. A driving gear 521 is rotatably provided on one side of the convex seat, and a rotating motor 2 is installed on the side wall of the other side of the convex seat by screws, and the motor shaft of the rotating motor 2 is connected to the driving gear 521 for driving.

[0082] A rotating ring 53 meshing with the driving gear 521 is rotatably arranged between the inner walls of the fixed ring 52, and a tooth groove matching the driving gear 521 is provided on the outer surface of the rotating ring 53, and a clamping groove matching the rotating ring 53 is provided on the inner wall of the fixed ring 52. The rotating ring 53 rotates between the inner walls of the clamping groove, thereby limiting and fixing the position of the rotating ring 53. A groove 531 is provided on the side wall of the rotating ring 53 facing the testing mechanism 4, and at least three clamping members are evenly distributed in the groove 531. A sensor 3 connected to the PLC controller via an electrical signal is embedded on the surface of the clamping member 532 on one side in contact with the external shaft 3, which is not shown in the figure. An electric push rod 1 connected to the clamping member 532 is installed on the outer surface of the rotating ring 53 by screws. A fixing plate 54 is installed on the side wall of the groove 531 by bolts. A fixing groove 2 is opened on the fixing plate 54 along its length direction. An adjusting block 541 is slidably arranged between the inner walls of the fixing groove 2. Both ends of the adjusting block 541 are integrally formed with protrusions and The two adjusting handles 542 are respectively slidably arranged along the top wall and the bottom wall of the fixing plate 54, and the electric push rod 2 is installed in the fixing groove 2. The motor part of the electric push rod 2 is built between the inner walls of the fixing plate 54, and the movable end of the electric push rod 2 is fixed to the side wall of the adjustment block 541 by screws, wherein two adjustment handles 542 are rotatably arranged on the side wall of the fixing plate 54 facing the groove 531 through an axis connection, and the two adjustment handles 542 are coaxially arranged, and a limiting block 5421 is welded on the adjustment handle 542, and the side wall of the limiting block 5421 that contacts the key pin 31 is flat The limit blocks 5421 on both sides are located on opposite side walls during their movement, and sensors four (not shown in the figure) are embedded on them, which are connected to the PLC controller through electrical signals. The sensor four can contact the key pin 31, and a threaded shaft is installed on the other side wall of the adjusting handle 542 in a threaded connection manner. One end of the threaded shaft is threaded, and the other end is not threaded. A movable handle 5411 is rotatably provided on the raised side wall through an axis, and the other end of the movable handle 5411 is connected to the other end of the threaded shaft and is rotatably provided therebetween.

[0083] A fixing groove three is also provided on the side wall of the adjusting handle 542 along its length direction, an extension shaft 543 is threadedly connected to one end of the fixing plate 54 and fixed thereto as a whole, a moving block 55 is slidably provided on the extension shaft 543, and fixing arms 551 are fixedly installed on both side walls of the moving block 55 by screws, a synchronization shaft 552 with a "T"-shaped structure is fixed on the side wall of the fixing arm 551 near the other end in a threaded connection, and one end of the synchronization shaft 552 slides between the inner walls of the fixing groove three.

[0084] An inner ring groove is also provided on the inner wall of the rotating ring 53, and a guide block 561 is slidably arranged between the inner walls of the inner ring groove. A rotating shaft passes through the middle of the guide block 561, and both ends of the rotating shaft are also slidably arranged along the inner wall of the rotating ring 53 (that is, shaft grooves matching the rotating shaft are also provided on both sides of the inner ring groove, which are not shown in the figure), so as to limit the movement position of the guide block 561, and a movable plate 56 is fixed to the side wall of the guide block 561 by screws, and a through hole three is provided on the movable plate 56.

[0085] The movable bar 57 is arranged in an "L"-shaped structure, and a linkage shaft 58 is fixed between the moving block 1 55 and the side wall of the movable bar 57 by means of a threaded connection. The linkage shaft 58 passes through the through hole 3 and can be slidably arranged along the inner wall of the through hole 3. A fixing groove 4 arranged along its width direction is opened on one side wall of the movable bar 57, and a guide shaft is welded between the inner walls of the fixing groove 4, and a spring 2 is sleeved on the guide shaft, and a slider is elastically slidably arranged on the guide shaft. The slider is welded as a whole with one end of a spring key 571, and one end of the spring key 571 is slidably arranged along the surface of the movable bar 57. A sensor 5 (not shown in the figure) connected to the PLC controller through an electrical signal is embedded at the end position on the surface of one end of the spring key 571. One end of the spring 2 is fixed to the inner wall of the fixing groove 4, and the other end is in contact with the side wall of the slider. A fixing groove 5 is opened on the other side wall of the movable bar 57 along its length direction, and a limit bar is installed on the bottom wall of the fixing groove 5 by screws. 574, a sensor six (not shown in the figure) connected to the PLC controller through an electrical signal is embedded on the side wall of the limit bar 574 facing the moving block two 572, a guide wheel 573 is rotatably arranged on one side of the limit bar 574 between the inner walls of the fixed groove five through an axis connection, and a moving block two 572 that slides along the inner wall of the fixed groove five is movably arranged on the other side of the limit bar 574 through an electric push rod three, a pull rope is connected between the moving block two 572 and the spring key 571, the pull rope is arranged around the guide wheel 573 and the pull rope will never separate from the guide wheel 573 (that is, a rope groove for the pull rope to move is opened on the guide wheel 573), and the motor part of the electric push rod three is built between the inner walls of the movable bar 57, and an adsorption sheet is sleeved on the movable end of the electric push rod three, a positioning groove compatible with the adsorption sheet is opened on the side wall of one end of the moving block two 572 facing the electric push rod three, the positioning groove and the adsorption sheet can be fixed as a whole by suction, and an electric suction cup (not shown in the figure) is embedded in the positioning groove.

[0086] The spring key 571 and the key pin 31 are matched with the key slot 211. The sensor 5 can be triggered only when it is embedded in the key slot 211 and contacts the inner wall of the key slot 211. During the rotation of the spring key 571 along the outer surface of the output shaft 21, the position where the two directly contact each other is only Fig.12 The dashed lines show line contact, and there is no surface contact.

[0087] It should be further explained that the end of the circumscribed shaft 3 with the key pin 31 is moved to contact the adjusting handle 542 located on the outside and then stops moving. At this time, the circumscribed shaft 3 is moved in a state of penetrating the shaft ring 42. Subsequently, the electric push rod 1 is started and controls the clamping member 1 532 to move to contact the outer surface of the circumscribed shaft 3. When the sensor 3 is triggered, the electric push rod 1 stops. At the same time, the electric push rod 2 is started to drive the adjusting block 541 to move along the length direction of the fixing plate 54 toward the rotation center position of the adjusting handle 542, thereby The movable handle 5411 drives the two adjusting handles 542 to rotate towards each other until the limit blocks 5421 on both sides contact the side walls of the key pin 31 respectively, and the sensor four is triggered. At this time, the electric push rod two stops. At the same time, during the movement of the adjusting block 541, as the adjusting handle 542 rotates, the synchronization shaft 552 on the other side wall also cooperates to control the position movement of the moving block 1 55 on the extension shaft 543. As the moving block 1 55 moves, the movable bar 57 also moves synchronously.

[0088] When the sensor 4 is triggered, the rotating motor 2 starts to start, and the driving gear 521 drives the rotating ring 53, so that the rotating ring 53 starts to rotate at a low speed (5-8rpm) between the inner walls of the fixed ring 1 52. During the rotation, due to the clamping effect of the clamping member 1 532 on the circumscribed shaft 3, the circumscribed shaft 3 rotates together with the rotating ring 53 and its internal components. However, the position of the key pin 31 on the circumscribed shaft 3 and the two limit blocks 5421 in the contact state, and the relative position of the two limit blocks 5421 and the spring key 571 after the rotation stops, The position will not change. With the triggering of sensor four, the electric suction cup stops working. At this time, the electric push rod three is in the state of shortest output distance, and the spring key 571 is acted upon by spring two during rotation and is bounced to a position in contact with the output shaft 21, and rotates along the outer surface of the output shaft 21 until the spring key 571 moves to the key slot 211 position, and is embedded in the key slot 211 under the action of spring two. At this time, sensor five is triggered, and the key pin 31 on the external shaft 3 is in the same straight line as the spring key 571 in the key slot 211.

[0089] After the sensor 5 is triggered, the linear motor starts and pushes the moving frame 51 to Figure 6 At the other end of the limit frame 59 shown in the figure, when the sensor 1 on this side is triggered, the linear motor stops. At this time, the other end of the circumscribed shaft 3 has moved into the adjustment mechanism 6 and is in a penetrating state. Subsequently, the electric push rod 1 is reset, and the clamping member 1 532 leaves the surface of the circumscribed shaft 3. At the same time, the clamping member 2 64 of the adjustment mechanism 6 is clamped and fixed with the other end of the circumscribed shaft 3. After the electric push rod 1 is reset, the linear motor is also reset immediately, driving the moving frame 51 to move back Figure 6After the linear motor is reset, the rotary motor is started, and the control screw is rotated in the reverse direction to reset, thereby moving the movable seat 511 and the components thereon to the position shown in FIG. Figure 6 The left side of the moving seat 511 moves until the sensor 2 on one side of the moving seat 511 is triggered, and the rotating motor 1 is reset and stopped. Figure 6 The other end of the moving frame 51 is shown in contact.

[0090] Among them, it is also necessary to explain that when the spring key 571 moves out of the key slot 211 with the moving frame 51, the signal of sensor five on the spring key 571 is disconnected. At this time, the PLC controller immediately controls the electric push rod three to extend and starts the electric suction cup. The electric push rod three extends to drive the adsorption plate to move. When the adsorption plate moves into the positioning groove, it is connected to the electric suction cup through suction. However, the electric push rod three does not pause at this time and continues to extend until the moving block two 572 moves to contact the limit bar 574. The sensor six on the limit bar 574 is triggered. At this time, the PLC controller immediately controls the electric push rod three to reset, thereby driving the pull rope to synchronously pull the spring key 571 to one side to reset, so that the spring key 571 no longer enters the key slot 211 when it moves to the side of the output shaft 21 with the moving frame 51 to reset.

[0091] like Fig.13 As shown, the adjustment mechanism 6 includes a second fixing frame 61, a second moving seat 62, a second fixing ring 63, a second clamping member 64 and a through-beam infrared sensor 65;

[0092] The fixed frame 2 61 is in a rectangular frame structure and is installed on the lower frame by screws. A moving seat 2 62 is slidably arranged between the inner walls of the fixed frame 2 61. Sensors 7 (not shown in the figure) connected to the PLC controller through electrical signals are embedded on both side walls of the moving seat 2 62. A screw rod 2 that cooperates with the threaded transmission is penetrated between the inner walls of the moving seat 2 62. The screw rod 2 is rotatably arranged between the inner walls of the fixed frame 2 61, and a rotating motor 3 for driving the screw rod 2 is connected to one end of the screw rod 2. A pillar is welded in the middle of the top surface of the moving seat 2 62, and a fixing ring 2 63 is installed on the top of the pillar by screws. At least three electric push rods 4 are installed on the outer wall of the fixing ring 2 63 by screws. A clamping piece 2 64 is installed on the output end of the electric push rod 4. A sensor 8 (not shown in the figure) connected to the PLC controller through electrical signals is embedded on the surface of the side of the clamping piece 2 64 that contacts the external shaft 3. A beam-type infrared sensor 65 is installed at a relative position on one side wall of the fixed ring 2 63.

[0093] It should be further explained that, in the initial state, that is, when the circumscribed shaft 3 has not yet moved to the side where the adjustment mechanism 6 is located, the movable seat 2 62 is just as Fig.13As shown, the outer shaft 3 contacts one end of the fixing frame 2 61. As the outer shaft 3 moves toward the side of the adjustment mechanism 6 in the subsequent process, when its end passes through the fixing ring 2 63 and passes through the infrared sensor 65, the moving frame 51 at this time just moves to Figure 6 At the other end of the limit frame 59 shown, immediately after the docking signal of the opposing infrared sensor 65 is interrupted, the PLC controller immediately starts the electric push rod four, causing the clamping member 2 64 to approach the end surface of the external shaft 3 until it contacts and clamps. At this time, the sensor eight is triggered and the electric push rod four stops.

[0094] Then, when the external shaft 3 moves toward the output shaft 21, the rotating motor 3 starts to rotate in the positive direction, controlling the moving seat 2 62 to move in the positive direction. Fig.13 The other side of the movable seat 2 62 moves until the other end of the fixed frame 2 61 contacts the sensor 7, the rotating motor 3 stops, and the key pin 31 is just embedded in the key slot 211. After that, the PLC controller controls the electric push rod 4 to reset, and then resets the movable seat 2 62 after it is reset, so that it moves back to Fig.13 Stop at the position shown.

[0095] The sensors 1 to 8 mentioned above are all contact sensors.

[0096] A detection method for an automated detection system for a stepper motor comprises the following steps:

[0097] First, the circumscribed shaft 3 is passed through the collar 42 and extended to a position where it contacts the adjusting handle 542 located on the outside, and at the same time, the key pin 31 on the circumscribed shaft 3 is kept in the direction on the same side as the pin groove after passing through (for example, if the pin groove is in a horizontal left position, then the key pin 31 only needs to be kept on the left half, and does not necessarily have to be kept in a horizontal left position);

[0098] Then, the angular position of the adjusting handle 542 is adjusted, and the electric push rod 2 is started through the PLC controller, so that it drives the adjusting block 541 to move along the length direction of the fixed plate 54 toward the position of the adjusting handle 542, thereby cooperating with the movable handle 5411 to control the adjusting handles 542 on both sides to rotate and adjust toward the position of the extension shaft 543, until the limit block 5421 stops adjusting when it rotates with the adjusting handle 542 to contact the side wall of the key pin 31. At this time, the sensor 4 is triggered. During the rotation of the adjusting handle 542, the adjusting handles 542 on both sides are synchronous and move toward each other, and the position of the key pin 31 is relatively close to one of the limit blocks 5421 (when the key pin 31 is exactly located in the middle position of the two adjusting handles 542, the distance between the key pin 31 and the upper limit blocks 5421 of the two adjusting handles 542 is equal). After one of the relatively closer limit blocks 5421 contacts the key pin 31 first, the electric push rod 2 continues to output until the other one A limit block 5421 also contacts the key pin 31, at which time both sensors 4 are triggered, and, in the process after one of the limit blocks 5421 contacts the key pin 31, the external shaft 3 moves together with the limit block 5421 (i.e., the limit block 5421 that has contacted the key pin 31) to the side where the other limit block 5421 is located, until both limit blocks 5421 contact the key pin 31, at which time, the central axis of the key pin 31 is on the angular bisector of the two adjustment handles 542; at the same time, in the process of the adjustment handle 542 being rotated and adjusted, the moving block 1 55 synchronously displaces and moves under the action of the synchronization shaft 552, and drives the movable bar 57 to move together, and, after both sensors 4 are triggered, the PLC controller immediately disconnects the suction between the adsorption sheet and the electric suction cup (i.e., closes the electric suction cup), so that the spring key 571 on the movable bar 57 is bounced to a position in contact with the output shaft 21 under the action of the spring 2;

[0099] Afterwards, the electric push rod 1 is started by the PLC controller, thereby controlling the clamping member 1 532 to approach the external shaft 3, until the sensor 3 is triggered, at which time the end of the external shaft 3 is clamped and fixed between the multiple clamping members 1 532, and the electric push rod 1 also stops immediately;

[0100] Then, the angle of the rotating ring 53 is adjusted by rotating the rotating motor 2 through the PLC controller, so that the rotating motor 2 drives the driving gear 521 to rotate, thereby controlling the angle adjustment of the rotating ring 53. As the rotating ring 53 rotates, the components thereon rotate synchronously, so that the movable bar 57 moves in a circular motion around the output shaft 21. At the same time, the spring key 571 always maintains a linear contact motion state with the output shaft 21 during the circular motion of the movable bar 57, until the spring key 571 moves to the key slot 211, the spring key 571 is embedded in the key slot 211 and the angle adjustment stops. At this time, the sensor 5 is triggered, and the key pin 31 is aligned with the key slot 211.

[0101] Afterwards, the connection state between the rotating ring 53 and the external shaft 3 is kept unchanged, and the linear motor is started by the PLC controller to make the moving frame 51 drive the moving frame 1 and the rotating ring 53 to move to the side away from the output shaft 21. When the moving frame 51 contacts the end of the limit frame 59 away from the output shaft 21, the sensor 1 on this side is triggered. At this time, the other end of the external shaft 3 also passes through the fixed ring 2 63 and is located between the opposing infrared sensor 65, thereby disconnecting the docking signal of the opposing infrared sensor 65. Then, the PLC controller immediately starts the electric push rod 4, so that it drives the clamping piece 2 64 to approach the external shaft 3, and clamps the end of the external shaft 3 with multiple clamping pieces 2 64. At this time, the sensor 8 is triggered. Subsequently, the PLC controller starts the rotating motor 1, so that it drives the moving seat 1 511 to move to the end away from the output shaft 21, and stops when the sensor 2 on the moving seat 1 511 is triggered. At this time, the docking mechanism 5 has left the docking position.

[0102] Subsequently, the PLC controller starts the linear motor again to make it start to reset. At the same time, it also starts the rotating motor three, so that the movable seat two 62 moves synchronously and at the same speed as the movable frame 51 resets. When the linear motor resets and stops, the movable frame 51 just contacts the end of the limit frame 59 close to the output shaft 21, and the sensor one on this side is triggered. At the same time, the movable seat two 62 also moves to the other end of the fixed frame two 61, and the key pin 31 on the external shaft 3 is just embedded in the key groove 211. Subsequently, the PLC controller starts the electric push rod four and makes it drive the clamping part two 64 to reset. After the reset stops, the rotating motor three is reset again, so that the movable seat two 62 moves to the original position. After the movable seat two 62 is reset, the sensor seven on this side is triggered, and the rotating motor three stops. Finally, the click to be tested is started, and the vibration of the output shaft 21 is synchronized through the external shaft 3, and the amplitude change degree is amplified through the test mechanism 4.

[0103] The specific situation of the change of the amplified amplitude of the test mechanism 4 is as follows:

[0104] When the output shaft 21 vibrates, the vibration is transmitted to the collar 42 through the external shaft 3, so that the collar 42 drives the lifting sleeve 421 to make vertical linear motion, causing the elastic components 43 on both sides to swing continuously. Due to the driving shaft 452, the swing arm 1 45 is driven by the elastic component 43 on one side and also starts to make circular motion, and then cooperates with the connecting shaft 451 at the end of the swing arm 1 45 to control the swing arm 2 46 to synchronously amplify the circular swing amplitude, so that the tester can more clearly observe the change of the amplitude of the output shaft 21, and then know the stability performance of the output shaft 21.

[0105] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, internal communication between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the meanings of the above terms in this application can be understood according to specific circumstances.

[0106] The above is a detailed introduction to an automatic detection system and detection method for a stepper motor provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An automated detection system for a stepper motor, characterized in that: include: A test frame (1), the test frame (1) comprising an upper frame and a lower frame connected as one body by a plurality of pillars, a control terminal (11) with a PLC controller being mounted on the top surface of the upper frame; A motor to be tested (2) is installed between the upper frame and the lower frame, an output shaft (21) is installed on the output end of the motor to be tested (2), and a keyway (211) is provided on the output shaft (21); A testing mechanism (4), the testing mechanism (4) comprising a fixing frame (41), an amplitude component, an elastic component (43) and an amplifying component, the fixing frame (41) being mounted on the top surface of the upper frame, the amplitude component being mounted below the fixing frame (41), and fixing seats (412) being mounted on both vertical side walls of the fixing frame (41), the fixing seat (412) and the amplitude component being mounted with the elastic component (43) for co-frequency transmission of vibration generated by the output shaft (21), the amplifying component being mounted between the elastic component (43) and the fixing seat (412) on one side, the amplifying component moving with the swing of the elastic component (43), and thereby making the detection result significant by amplifying the swing angle; An external shaft (3) is provided through the input position of the amplitude component, an inner groove is provided on one end of the external shaft (3) facing the output shaft (21), a key pin (31) connected to the external shaft (3) as a whole is provided on the inner wall of the inner groove, and the key pin (31) is matched with the key groove (211); A docking mechanism (5), wherein the docking mechanism (5) is arranged between the external shaft (3) and the output shaft (21), and comprises a positioning component, a limiting component and a moving component. A "U"-shaped limiting frame (59) is installed on the lower chassis, and the moving component reciprocates between the side walls of the limiting frame (59) in a linear direction. A fixed ring (52) arranged along its length direction is arranged on the moving component, and a rotating ring (53) is rotatably arranged between the inner walls of the fixed ring (52). A positioning component is arranged on one side of the rotating ring (53) for locating the position of the key pin (31), and a limiting component is arranged on the other side of the rotating ring (53) for locating the key slot (211). The positioning component is synchronously connected with the limiting component and can be rotated and adjusted synchronously with the rotating ring (53); An adjustment mechanism (6), wherein the adjustment mechanism (6) is mounted on the lower chassis, and a second fixing ring (63) capable of reciprocating along the length direction of the test frame (1) is provided on the adjustment mechanism (6); when one end of the circumscribed shaft (3) passes through the second fixing ring (63), the end of the circumscribed shaft (3) can be fixed at a middle position of the second fixing ring (63) and drive the circumscribed shaft (3) to perform a docking process with the output shaft (21).

2. The automatic detection system for stepper motor according to claim 1, characterized in that: The amplitude component comprises a shaft collar (42), a guide shaft (411) and a lifting shaft sleeve (421); The fixing frame (41) is arranged in a "U"-shaped structure, a through hole (41) is opened on the upper frame, the top end of the guide shaft (411) is fixed in the middle of the bottom wall of the fixing frame (41), and the lifting sleeve (421) is slidably arranged on the outer wall of the guide shaft (411); Two fixing plates 1 are installed on the side wall of the fixing seat (412) facing the amplitude component, and two fixing plates 2 are installed at two relative positions on the outer wall of the lifting shaft sleeve (421). The elastic component (43) includes a fixing cylinder (431), a piston shaft (432) and a piston plate (433). One end of the piston shaft (432) is connected to the piston plate (433) as a whole. The piston plate (433) is elastically slidably arranged between the inner walls of the fixing cylinder (431). A "T"-shaped connecting portion is installed on one end of the fixing cylinder (431). The connecting portion is connected to the two fixing plates 1 on the same fixing seat (412) through an axis. The other end of the piston shaft (432) is located outside the fixing cylinder (431) and is connected to the two fixing plates 2 on the same side through an axis.

3. The automatic detection system for stepper motor according to claim 2, characterized in that: The amplifying assembly comprises a dial (44), a first swing arm (45) and a second swing arm (46); Two swing arms (45) are symmetrically arranged and are rotatably arranged on the side walls of the same fixed seat (412) through shaft connection. A fixing groove (45) is provided along its length direction on one side wall of the swing arm (45). Two driving shafts (452) arranged opposite to each other are installed on the outer wall of the fixing cylinder (431) on one side. The other end of the driving shaft (452) slides between the inner walls of the fixing groove (431). A connecting shaft (451) is installed between one end of the swing arms (45) on both sides. A connecting strip (441) is installed on the bottom wall of the upper frame, and a dial (44) is installed between the top wall of the connecting strip (441) and the side wall of the fixing frame 1 (41); A connecting seat (462) is installed on one side wall of the upper frame, two swing arms (46) are symmetrically arranged, and their ends are rotatably arranged on the side walls of the connecting seat (462) in a coaxially connected manner, and an indicator mark (461) is fixedly installed between the other ends of the swing arms (46) on both sides through an axis, and the indicator mark (461) moves on the surface of one side of the dial (44), and a through hole (451) is opened on the swing arm (46) along its length direction, and the connecting shaft (451) passes through and can move and adjust along the inner wall of the through hole (451).

4. The automatic detection system for stepper motor according to claim 3, characterized in that: The moving assembly comprises a moving frame (51), a moving seat (511) and a fixing ring (52); The moving frame (51) is arranged in a rectangular frame structure, and a linear motor is connected to one side of the moving frame (51). The moving seat (511) is slidably arranged between the inner walls of the moving frame (51) by means of threaded transmission. The fixing ring (52) is mounted on the top surface of the moving seat (511), and a convex seat connected to the side wall of the fixing ring (52) is arranged integrally. A driving gear (521) is rotatably arranged on one side of the convex seat, and the driving gear (521) is meshed with the rotating ring (53) for transmission.

5. The automatic detection system for stepper motor according to claim 4, characterized in that: The positioning assembly comprises a fixing plate (54), an adjusting block (541) and an adjusting handle (542); A groove (531) is provided on a side wall of the rotating ring (53) facing the testing mechanism (4), a plurality of clamping members (532) are evenly arranged in the groove (531), and an electric push rod (1) is installed on one side of the clamping member (532) on the outer wall of the rotating ring (53); One end of the fixed plate (54) is fixed to the side wall of the groove (531), and an adjustment block (541) is slidably arranged along the length direction of the fixed plate (54). One side of the adjustment block (541) is provided with two electric push rods connected to the fixed plate (54) for driving. The top wall and the bottom wall of the adjustment block (541) are provided with protrusions connected to the fixed plate (54). Two adjustment handles (542) are provided on the side wall of the fixed plate (54) facing the groove (531) so as to rotate coaxially. A limit block (5421) connected to the adjustment handle (542) is installed on the adjustment handle (542). One side wall of the limit block (5421) is a plane. A threaded shaft is threadedly connected to one side wall of the adjustment handle (542). A movable handle (5411) is provided on the side wall of the protrusion through a shaft connection. The other end of the movable handle (5411) is connected to the other end of the threaded shaft and the two are provided in a rotationally connected manner. An extension shaft (543) is mounted on the other end of the fixed plate (54), a moving block (55) is slidably mounted on the extension shaft (543), fixed arms (551) are mounted on opposite side walls of the moving block (55), a fixing groove (3) is further formed on the adjusting handle (542) along its length direction, a synchronizing shaft (552) is mounted on the fixing arm (551), and the other end of the synchronizing shaft (552) is slidably mounted along the inner wall of the fixing groove (3).

6. The automatic detection system for stepper motor according to claim 5, characterized in that: The limiting component comprises a movable bar (57) and a spring key (571); The movable bar (57) is arranged in an "L"-shaped structure. A linkage shaft (58) is connected between the moving block 1 (55) and the side wall of the movable bar (57). A fixing groove 4 and a fixing groove 5 are respectively provided on the adjacent side walls of the movable bar (57). The fixing groove 4 is arranged along the width direction of the movable bar (57). The fixing groove 5 is arranged along the length direction of the movable bar (57). A slider is elastically slidably arranged between the inner walls of the fixing groove 4 along the length direction thereof. The slider is fixed to one end of the spring key (571). A limit strip (574) is installed on the bottom wall of the fixed groove five, and a moving block two (572) is slidably arranged on one side of the limit strip (574) along the inner wall of the fixed groove five, and a guide wheel (573) is rotatably arranged on the other side of the limit strip (574) between the inner walls of the fixed groove five through an axis, and a pull rope that never separates from the guide wheel (573) is arranged on the guide wheel (573), one end of the pull rope is fixed on the side wall of the moving block two (572), and the other end of the pull rope is fixed on the side wall of the spring key (571), wherein an electric push rod three is installed between the inner walls of the fixed groove five, and an adsorption sheet is arranged on the movable end of the electric push rod three, and a positioning groove matching the adsorption sheet is opened on the side wall of the moving block two (572) facing the electric push rod three, and an electric suction cup is embedded in the positioning groove, and the electric suction cup and the adsorption sheet can be connected and fixed together by suction; A guide block (561) is slidably disposed between the inner walls of the rotating ring (53), one end of the guide block (561) is connected to a movable plate (56), a through hole three is provided on the movable plate (56), and a linkage shaft (58) passes through the through hole three and can be slidably disposed along the inner wall of the through hole three.

7. An automatic detection system for a stepper motor according to claim 6, characterized in that: When the clamping member 1 (532) contacts the outer surface of the circumscribed shaft (3), the circumscribed shaft (3) is located at a middle position of the rotating ring (53), and an end of the circumscribed shaft (3) contacts the side wall of one of the adjustment handles (542); When the adjusting handles (542) on both sides move towards each other under the drive of the adjusting block (541), the planes of the two limit blocks (5421) can respectively contact the side walls of the key pin (31) on both sides during the movement. During the movement of the adjusting handle (542), the synchronizing shaft (552) also synchronously controls the moving block 1 (55) to make a linear movement on the extension shaft (543), so that the movable bar (57) also synchronously moves with the moving block 1 (55), and the center line of the movable bar (57) along its height direction always falls within the plane where the angular bisectors of the two adjusting handles (542) are located. When the limit block (5421) contacts the key pin (31), the suction force between the movable block 2 (572) and the adsorption sheet disappears, and the spring key (571) is bounced to a position in contact with the outer surface of the output shaft (21). Thereafter, during the process of the rotating ring (53) rotating and adjusting along with the driving gear (521), the spring key (571) and the outer surface of the output shaft (21) are in a state of linear contact rotation. When the spring key (571) moves to the key slot (211), the spring key (571) is embedded in the key slot (211) under the action of elasticity. At this time, the key pin (31) and the key slot (211) are already in an aligned state.

8. The automatic detection system for stepper motors according to claim 7, characterized in that: The adjustment mechanism (6) comprises a second fixing frame (61), a second moving seat (62), a second fixing ring (63), a second clamping member (64) and a beam-type infrared sensor (65); the second fixing frame (61) is in a rectangular frame structure and is mounted on a lower frame; the second moving seat (62) moves between the inner walls of the second fixing frame (61) by means of a screw drive; the second fixing ring (63) is mounted above the middle of the top wall of the second moving seat (62) by means of a support; a plurality of second clamping members (64) are evenly arranged in the middle of the second fixing ring (63); and one side of the second clamping member (64) is mounted on the outer wall of the second fixing ring (63) with an electric push rod four connected to the second clamping member (64) and driven therewith; The through-beam infrared sensor (65) is mounted at a relative position on the side wall of the second fixing ring (63). When one end of the movable frame (51) moves to contact with an end of the limit frame (59) away from the motor to be tested (2), one end of the external shaft (3) passes through the through-beam infrared sensor (65), and the signal of the through-beam infrared sensor (65) is disconnected. Then, the external shaft (3) is fixed between the side walls of the second clamping member (64).

9. The detection method for an automated detection system for a stepping motor according to claim 8, characterized in that: The following steps are involved: S1. First, the circumscribed shaft (3) is passed through the shaft ring (42) and extended to a position where it contacts the adjusting handle (542) located on the outside, and the key pin (31) and the key slot (211) are located in the same direction; S2. Next, the angular position of the adjusting handle (542) is adjusted so that the adjustment stops when the limit block (5421) rotates to contact the key pin (31) in the circumscribed shaft (3). At this time, the limit blocks (5421) on the two adjusting handles (542) contact the side walls of the key pin (31) respectively. At the same time, the movable bar (57) moves synchronously with the movement of the adjusting handle (542). Moreover, the elastic key (571) on the movable bar (57) moves to a position in contact with the output shaft (21) under the action of the elastic force. Subsequently, the end of the circumscribed shaft (3) is clamped and fixed by the clamping member 1 (532). S3, then, the rotating ring (53) is adjusted in angle rotation, so that the movable bar (57) moves in a circle around the output shaft (21), and at the same time, the spring key (571) and the output shaft (21) always maintain a motion state of linear contact, until the spring key (571) moves to the position of the key slot (211), the spring key (571) is embedded in the key slot (211) and the angle adjustment is stopped, at which time, the key pin (31) and the key slot (211) are in an aligned state; S4, then, the connection state between the rotating ring (53) and the circumscribed shaft (3) is maintained unchanged, and the rotating ring (53) is moved and adjusted toward one side of the adjusting mechanism (6) until the circumscribed shaft (3) passes through the adjusting mechanism (6) and the signal of the through-beam infrared sensor (65) is disconnected, thereby triggering the second clamping member (64) to clamp and fix the other end of the circumscribed shaft (3), and then, the docking mechanism (5) is reset and moved along the width direction of the test frame (1) to the other end of the movable frame (51); S5. Finally, the adjusting mechanism (6) drives the external shaft (3) to move again along the aligned line toward one side of the output shaft (21) until the second movable seat (62) moves to the other end of the second fixed frame (61). At this time, the key pin (31) on the external shaft (3) is just embedded in the key slot (211). Subsequently, the second clamping member (64) and the adjusting mechanism (6) are reset, and the motor (2) to be tested is started. The stable performance of the output shaft (21) is transmitted through the external shaft (3), and the amplitude change degree is amplified through the testing mechanism (4).

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