Motor assembly parallelism and run-out value testing machine

Abstract

The invention relates to a motor assembly parallelism and run-out value testing machine which comprises a supporting frame, a jig for bearing and positioning a motor shell is arranged on the supporting frame, a first driving mechanism for driving a rotor in the motor shell to rotate is arranged on the supporting frame, and a transmission block for transmitting to the rotor is arranged on the first driving mechanism. The transmission block is provided with a self-centering inner supporting mechanism for centering and internally supporting the rotor, the supporting frame is provided with a second driving mechanism for driving the transmission block to abut against the rotor, the supporting frame is further provided with a testing mechanism for testing the parallelism and the run-out value of the rotor, and the self-centering inner supporting mechanism is used for centering the rotor. Eccentricity generated when the first driving mechanism drives the rotor to rotate relative to the motor shell is prevented, parallelism testing and run-out value testing are prevented from being affected, meanwhile, the self-centering inner supporting mechanism internally supports the rotor to share the transmission force of the transmission block, the pressure of the transmission block abutting against the rotor when the rotor rotates is reduced, and the service life of the motor is prolonged. Problems in assembly of the rotor and the motor casing are prevented.

Description

Technical Field

[0001] The invention relates to the field of motor testing, and more specifically to a motor assembly parallelism and runout value testing machine. Background Art

[0002] In the process of producing motors, the assembled motor assembly needs to be tested. The parallelism and runout value of the rotor relative to the motor housing will cause problems such as motor vibration and noise, and even make the motor unable to run. Therefore, the parallelism test and runout value test of the rotor on the motor relative to the motor housing are a link that cannot be ignored.

[0003] The existing testing machines all test the parallelism and runout value of the rotor by pressing a rubber wheel on the rotor, thereby causing the rotor to rotate through the friction between the rubber wheel and the rotor, so that the testing mechanism can test the parallelism and runout value of the rotor relative to the motor housing. The rubber wheel presses on the rotor, and at the same time, under the action of the assembly gap between the rotor and the motor housing, the rotor is easily eccentric with the motor housing, resulting in the parallelism test and the runout value test being affected. Summary of the invention

[0004] In view of the above-mentioned defects in the prior art, a motor assembly parallelism and runout value tester is provided.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a motor assembly parallelism and run-out value testing machine, including a support frame, a fixture for carrying and positioning a motor casing is provided on the support frame, a first driving mechanism for driving a rotor in the motor casing to rotate is provided on the support frame, a transmission block for transmitting power to the rotor is provided on the first driving mechanism, a self-centering internal supporting mechanism for centering and internally supporting the rotor is provided on the transmission block, a second driving mechanism for driving the transmission block to abut against the rotor is provided on the support frame, and a testing mechanism for testing the parallelism and run-out value of the rotor is also provided on the support frame.

[0006] Preferably, the self-centering internal support mechanism includes a rotating shaft and a disc, the rotating shaft is rotatably arranged in the transmission block, the first driving mechanism drives the rotating shaft to rotate, the disc is arranged on the rotating shaft and located in the transmission block, at least three arc grooves are arranged on the disc, and a plurality of the arc grooves are evenly spaced along the circumference of the disc, and the plurality of the arc grooves gradually move away from the center of the disc along the same circumference, and a round rod is matched and inserted in each of the arc grooves, and each of the round rods is connected to a sliding rod, the axis of the sliding rod is perpendicular to the axis of the round rod, and the sliding rod is set in the transmission block along the radial sliding direction of the disc, and a plurality of the sliding rods are evenly spaced along the circumference of the disc, and a plurality of the sliding rods extend outward from the center of the disc.

[0007] Preferably, a rubber pad is provided on the end surface of the sliding rod away from the center of the disc.

[0008] Preferably, the testing mechanism comprises two test sensors and a reference block providing a reference surface for the parallelism test of the motor casing, the reference block is arranged on the support frame at a position directly above the fixture, the bottom surface of the reference block is the reference surface, the reference block is an annular structure, the support frame is provided with two relatively movable mounting frames at positions on opposite sides above the reference block, and the two test sensors are correspondingly arranged on the two mounting frames.

[0009] Preferably, the support frame is provided with mounting blocks at positions on opposite sides above the reference block, and the mounting blocks are provided with sliding grooves. The two mounting frames are slid in the corresponding sliding grooves, and the two mounting blocks are threadedly connected with adjusting screws at ends away from each other. The adjusting screws penetrate into the sliding grooves and are rotatably connected with the corresponding mounting frames.

[0010] Preferably, the first driving mechanism includes a motor, a transmission shaft and a buffer block, the motor is arranged on the support frame at a position directly above the fixture, the transmission shaft is arranged on the output shaft of the motor, the buffer block is provided with a groove, the buffer block is slidably sleeved on the end of the transmission shaft away from the motor through the groove, a spring is arranged between the bottom of the groove of the buffer block and the transmission shaft, and the transmission block is arranged at the end of the buffer block away from the motor.

[0011] Preferably, the transmission block is located directly above the jig, and the second driving mechanism is located below the jig. The second driving mechanism includes a driving cylinder and a driving block. The driving cylinder is arranged on a support frame, and the driving block is arranged on an output end of the driving cylinder. The driving block is also connected to the bottom surface of the jig.

[0012] Preferably, the support frame includes a bottom plate, a top plate and a plurality of guide pillars, the plurality of guide pillars are vertically arranged on the top surface of the bottom plate, the jig is slidably arranged on the plurality of guide pillars, the top plate is connected to the top ends of the plurality of guide pillars, the testing mechanism is arranged on the top plate, the first driving mechanism is also arranged on the top plate, the second driving mechanism is arranged on the bottom plate, and the second driving mechanism drives the jig to slide on the guide pillars.

[0013] A method for testing parallelism and runout value of a motor assembly, the method comprising the following steps:

[0014] S101, placing the motor housing on a jig, the jig positions the motor housing, and the second driving mechanism makes the transmission block abut against the rotor.

[0015] S102, the self-centering inner supporting mechanism supports the inner wall of the rotor. In the process of supporting the inner wall of the rotor, the self-centering inner supporting mechanism makes the rotor and the self-centering inner supporting mechanism concentric.

[0016] S103, the first driving mechanism drives the rotor to rotate through the transmission block, and the testing mechanism tests the parallelism of the rotor relative to the motor housing. The testing mechanism also tests the runout value of the rotor.

[0017] The beneficial effects of the present invention are as follows: the rotor is centered by a self-centering inner support mechanism, thereby preventing eccentricity when the first drive mechanism drives the rotor to rotate relative to the motor housing, avoiding the parallelism test and the runout value test from being affected, and at the same time, the self-centering inner support mechanism internally supports the rotor to share the force transmitted by the transmission block, reducing the pressure of the transmission block against the rotor when the rotor rotates, reducing the influence of the transmission block pressure on the rotor, and preventing problems in the assembly of the rotor and the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 Embodiment of the present invention Figure 1 A magnified schematic diagram of the middle A area;

[0020] Figure 3 is a schematic diagram of the cross-sectional structure of an embodiment of the present invention along the AA direction;

[0021] Figure 4 Embodiment of the present invention Figure 3 A magnified schematic diagram of the middle B area;

[0022] Figure 5 It is a schematic diagram of the structure inside the transmission block of an embodiment of the present invention.

[0023] Figure numerals: 1 support frame, 10 bottom plate, 11 top plate, 12 guide column, 2 fixture, 3 first driving mechanism, 30 motor, 31 transmission shaft, 32 buffer block, 320 groove, 33 spring, 4 transmission block, 5 self-centering inner support mechanism, 50 rotating shaft, 51 disc, 52 arc groove, 53 round rod, 54 sliding rod, 6 second driving mechanism, 60 driving cylinder, 61 driving block, 7 testing mechanism, 70 test sensor, 71 reference block, 8 mounting frame, 80 mounting block, 81 slide groove, 82 adjusting screw, 9 rubber pad. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be clearly and completely described in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0025] Embodiments of the present invention Figures 1 to 5 As shown in, a motor assembly parallelism and runout value tester comprises a support frame 1, on which a jig 2 for carrying and positioning a motor casing is arranged, on which a first driving mechanism 3 for driving a rotor in the motor casing to rotate is arranged, on which the first driving mechanism 3 is arranged a transmission block 4 for transmitting information to the rotor, that is, the first driving mechanism 3 drives the rotor in the motor casing to rotate through the transmission block 4, on which the transmission block 4 is provided a self-centering internal support mechanism 5 for centering and internally supporting the rotor, on which a second driving mechanism 6 for driving the transmission block 4 to abut against the rotor is arranged on the support frame 1, and through the friction force generated by the pressure of the transmission block 4 abutting against the rotor, the first driving mechanism 3 cooperates with the transmission block 4 to drive the rotor to rotate, and on which a testing mechanism 7 for testing the parallelism and runout value of the rotor is also arranged, the support frame 1 includes a bottom plate 10, a top plate 11 and a plurality of guide pillars 12. Preferably, four guide pillars 12 are provided, and the four guide pillars 12 are vertically provided on the top surface of the bottom plate 10. The four guide pillars 12 are arranged in a rectangular shape on the top surface of the bottom plate 10. The jig 2 is slidably provided on the four guide pillars 12. The jig 2 is provided with four jig through holes, and each jig through hole is provided with a guide sleeve. The jig 2 is slidably provided on the guide pillars 12 through the guide sleeves. The top plate 11 is connected to the top ends of the four guide pillars 12. The testing mechanism 7 is provided on the top plate 11. The first driving mechanism 3 is also provided on the top plate 11. The second driving mechanism 6 is provided on the bottom plate 10. The second driving mechanism 6 drives the jig 2 to slide on the guide pillars 12, so that the rotor in the motor housing on the jig 2 abuts against the transmission block 4 on the first driving mechanism 3.

[0026] Further improvements, such as Figures 3 to 5As shown in, the self-centering inner support mechanism 5 includes a rotating shaft 50 and a disc 51, the rotating shaft 50 is rotatably arranged in the transmission block 4, the first driving mechanism 3 drives the rotating shaft 50 to rotate, the disc 51 is arranged on the rotating shaft 50 and is located in the transmission block 4, and at least three arc grooves 52 are arranged on the disc 51. Preferably, four arc grooves 52 are arranged at equal intervals along the circumference of the disc 51, and the four arc grooves 52 are gradually spaced apart along the same circumference. From the center of the disc 51, each of the arc grooves 52 is matched with a round rod 53 inserted therein, the round rod 53 slides in the corresponding arc groove 52, each of the round rods 53 is connected to a sliding rod 54, the axis of the sliding rod 53 is perpendicular to the axis of the round rod 53, the sliding rod 54 is set in the transmission block 4 along the radial sliding of the disc 51, the four sliding rods 54 are arranged at equal intervals along the circumference of the disc 51, and the four sliding rods 54 extend outward from the center of the disc 51. At this time, the transmission block 4 is rotatably connected to the first driving mechanism 3, the rotating shaft 50 passes through the transmission block 4 and is connected to the first driving mechanism 3, and a rubber pad 9 is arranged on the end surface of the slide bar 54 away from the center of the disc 51. The rotating shaft 50 is driven to rotate by the first driving mechanism 3, thereby driving the disc 51 to rotate. The disc 51 drives the corresponding four slide bars 54 to slide synchronously to the outside of the transmission block 4 through the four round rods 53. The four slide bars 54 slide out from the outer wall of the transmission block 4 and abut against the inner wall of the rotor. At this time, the self-centering inner support mechanism 5 centers the rotor through the synchronous sliding of the slide bars 54 to prevent the first driving mechanism 3 from driving the rotor to rotate relative to the motor housing. At the same time, the self-centering inner support mechanism 5 supports the rotor through the slide bars 54, so that the force transmitted by the transmission block 4 is shared by the friction force between the slide bars 54 and the inner wall of the rotor, reducing the pressure of the transmission block 4 abutting on the rotor when the rotor rotates, reducing the influence of the transmission block pressure on the rotor, and preventing the slide bars 54 from crushing or scratching the rotor through the rubber pads 9.

[0027] Further improvements, such as Figures 1 to 3As shown in, the test mechanism 7 includes two test sensors 70 and a reference block 71 that provides a reference surface for the parallelism test of the motor housing. The reference block 71 is arranged on the support frame 1 at a position directly above the fixture 2. The bottom surface of the reference block 71 is the reference surface. The reference block 71 is an annular structure. Preferably, the reference block 71 is a circular ring structure. The support frame 1 is provided with two relatively movable mounting frames 8 at positions on opposite sides above the reference block 71. The two test sensors 70 are correspondingly arranged on the two mounting frames 8. The test sensor 70 is a laser sensor. An avoidance through hole for avoiding the laser of the laser sensor is provided on the top plate 11 of the support frame 1. The support frame 1 is provided with mounting blocks 80 at positions on opposite sides above the reference block 71. The mounting blocks 80 is located on the left and right sides of the top plate 11, and a slide groove 81 is provided on the mounting block 80, and the slide groove 81 extends in the left and right directions. The left end of the right slide groove 81 is open, and the right end of the left slide groove 81 is open. The two mounting frames 8 are slidably arranged in the corresponding slide grooves 81, and the two mounting blocks 8 are threadedly connected with adjusting screws 82 at the ends away from each other, that is, the left wall of the mounting block 80 on the left is threadedly connected with the adjusting screw 82, and the right wall of the mounting block 80 on the right is threadedly connected with the adjusting screw 82. The adjusting screw 82 penetrates into the slide groove 81 and is rotatably connected to the corresponding mounting frame 8. By rotating the adjusting screw 82, the mounting frame 8 moves left and right in the corresponding slide groove 81, thereby adjusting the position of the test sensor 70 to facilitate testing of motor assemblies of different specifications.

[0028] Further improvements, such as Figure 1 , Figure 3 and Figure 4As shown in, the first driving mechanism 3 includes a motor 30, a transmission shaft 31 and a buffer block 32. The motor 30 is arranged on the support frame 1 at a position directly above the fixture 2. The transmission shaft 31 is arranged on the output shaft of the motor 30. The transmission shaft 31 is connected to the output shaft of the motor 30 through a coupling. A groove 320 is arranged on the buffer block 32. The buffer block 32 is a cylindrical structure. The groove 320 is located at the top of the buffer block 32. The buffer block 32 is slidably sleeved on the end of the transmission shaft 31 away from the motor 30 through the groove 320. It should be noted that a buffer block 32 is provided between the buffer block 32 and the transmission shaft 31 to prevent the buffer block 32 from slipping off the transmission shaft. The limiting mechanism of 31, for example, the limiting mechanism includes a limiting groove and a limiting block, the limiting groove is arranged on the inner side wall of the groove 320 of the buffer block 32, the limiting groove extends in the up and down directions, the limiting block is arranged on the outer side wall of the transmission shaft 31, the limiting block slides in the limiting groove, a spring 33 is arranged between the bottom of the groove 320 of the buffer block 32 and the transmission shaft 31, the transmission block 4 is arranged at one end of the buffer block 32 away from the motor, at this time the transmission block 4 is rotatably connected to the buffer block 32, when the second driving mechanism 6 drives the transmission block 4 to abut against the rotor, the transmission block 4 is buffered by the buffer block 32 and the spring 33 to prevent the rotor from being deformed by the pressure position of the transmission block 4.

[0029] Further improvements, such as Figure 1 and Figure 3 As shown in the figure, the transmission block 4 is located directly above the fixture 2, and the second driving mechanism 6 is located below the fixture 2. The second driving mechanism 6 includes a driving cylinder 60 and a driving block 61. The driving cylinder 60 is arranged on the support frame 1. The driving cylinder 60 is arranged on the bottom surface of the bottom plate 10 of the support frame 1. The output end of the driving cylinder 60 passes through the top surface of the bottom plate 10. The driving block 61 is arranged on the output end of the driving cylinder 60. The driving block 61 is also connected to the bottom surface of the fixture 2. The driving cylinder 60 drives the fixture 2 to slide up and down through the driving block 61.

[0030] A method for testing parallelism and runout value of a motor assembly, the method comprising the following steps:

[0031] S101, placing the motor housing on the fixture 2, the fixture 2 positions the motor housing, and the second driving mechanism 6 makes the transmission block 4 abut against the rotor.

[0032] S102, the self-centering inner supporting mechanism 5 supports the inner wall of the rotor. In the process of supporting the inner wall of the rotor, the self-centering inner supporting mechanism 5 makes the rotor concentric with the self-centering inner supporting mechanism 5, that is, the rotor is centered.

[0033] S103, the first driving mechanism 3 drives the rotor to rotate through the transmission block 4, and the testing mechanism 7 tests the parallelism of the rotor relative to the motor housing. The testing mechanism 7 also tests the runout value of the rotor.

[0034] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A motor assembly parallelism and runout value tester, comprising a support frame; characterized in that: The support frame is provided with a fixture for carrying and positioning the motor casing; the support frame is provided with a first driving mechanism for driving the rotor in the motor casing to rotate; the first driving mechanism is provided with a transmission block for transmitting power to the rotor; the transmission block is provided with a self-centering internal support mechanism for centering and internally supporting the rotor; the support frame is provided with a second driving mechanism for driving the transmission block to abut against the rotor; the support frame is also provided with a testing mechanism for testing the parallelism and runout value of the rotor.

2. A motor assembly parallelism and runout value tester according to claim 1, characterized in that: The self-centering internal support mechanism includes a rotating shaft and a disc; the rotating shaft is rotatably arranged in the transmission block; the first driving mechanism drives the rotating shaft to rotate; the disc is arranged on the rotating shaft and located in the transmission block; at least three arc grooves are arranged on the disc; a plurality of the arc grooves are arranged at equal intervals along the circumference of the disc; a plurality of the arc grooves gradually move away from the center of the disc along the same circumference; a round rod is matched and inserted in each of the arc grooves; each of the round rods is connected to a sliding rod; the axis of the sliding rod is perpendicular to the axis of the round rod; the sliding rod is arranged in the transmission block along the radial sliding direction of the disc; a plurality of the sliding rods are arranged at equal intervals along the circumference of the disc; a plurality of the sliding rods extend outward from the center of the disc.

3. A motor assembly parallelism and runout value tester according to claim 2, characterized in that: A rubber pad is arranged on the end surface of the slide rod away from the center of the disc.

4. A motor assembly parallelism and runout value tester according to claim 1, characterized in that: The testing mechanism includes two test sensors and a reference block that provides a reference surface for the parallelism test of the motor housing; the reference block is arranged on a support frame at a position directly above the fixture; the bottom surface of the reference block is the reference surface; the reference block is an annular structure; the support frame is provided with two relatively movable mounting frames at positions on opposite sides above the reference block; the two test sensors are correspondingly arranged on the two mounting frames.

5. A motor assembly parallelism and runout value tester according to claim 4, characterized in that: The support frame is provided with mounting blocks at positions on both sides opposite to each other above the reference block; a slide groove is provided on the mounting block; the two mounting frames are slid in the corresponding slide grooves; the two mounting blocks are threadedly connected with adjusting screws at ends away from each other; the adjusting screws penetrate into the slide groove and are rotatably connected with the corresponding mounting frames.

6. A motor assembly parallelism and runout value tester according to claim 1, characterized in that: The first driving mechanism includes a motor, a transmission shaft and a buffer block; the motor is arranged on the support frame at a position directly above the fixture; the rotating shaft is arranged on the output shaft of the motor; a groove is arranged on the buffer block; the buffer block is slidably sleeved on the end of the rotating shaft away from the motor through the groove; a spring is arranged between the bottom of the groove of the buffer block and the rotating shaft; the transmission block is arranged at the end of the buffer block away from the motor.

7. A motor assembly parallelism and runout value tester according to claim 1, characterized in that: The transmission block is located directly above the jig; the second driving mechanism is located below the jig; the second driving mechanism includes a driving cylinder and a driving block; the driving cylinder is arranged on a support frame; the driving block is arranged on the output end of the driving cylinder; the driving block is also connected to the bottom surface of the jig.

8. A motor assembly parallelism and runout value tester according to claim 1, characterized in that: The support frame includes a bottom plate, a top plate and a plurality of guide pillars; the plurality of guide pillars are vertically arranged on the top surface of the bottom plate; the jig is slidably arranged on the plurality of guide pillars; the top plate is connected to the top ends of the plurality of guide pillars; the testing mechanism is arranged on the top plate; the first driving mechanism is also arranged on the top plate; the second driving mechanism is arranged on the bottom plate; the second driving mechanism drives the jig to slide on the guide pillars.

9. A method for testing parallelism and runout value of a motor assembly, based on a motor assembly parallelism and runout value testing machine according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S101, placing the motor housing on a jig, the jig positions the motor housing, and the second driving mechanism makes the transmission block abut against the rotor. S102, the self-centering inner supporting mechanism supports the inner wall of the rotor. In the process of supporting the inner wall of the rotor, the self-centering inner supporting mechanism makes the rotor and the self-centering inner supporting mechanism concentric. S103, the first driving mechanism drives the rotor to rotate through the transmission block, and the testing mechanism tests the parallelism of the rotor relative to the motor housing. The testing mechanism also tests the runout value of the rotor.

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