Coaxiality calibration device for stator and rotor of permanent magnet synchronous motor

Abstract

The utility model relates to the technical field of motor production, in particular to a permanent magnet synchronous motor stator and rotor coaxiality calibration device which comprises a base, an annular frame is connected to the base, a calibration assembly is arranged on the annular frame, and the calibration assembly comprises three fixing columns. And a positioning assembly is arranged on the base. Through cooperation of the positioning assembly and the calibration assembly, the positioning assembly can force the stator to accurately move to a positioning area through the four pairs of rollers, after the stator is clamped by the four pairs of rollers, the stator is centered and positioned and is stably clamped, and the situation that the coaxiality calibration precision of a stator and a rotor is affected due to stator deviation is avoided; the calibration assembly synchronously clamps the rotor shaft through the three arc-shaped blocks, and when the rotor shaft deviates, the three arc-shaped blocks can forcibly set the rotor shaft to be positive, so that the coaxiality of the rotor and the stator is ensured, and the effect of calibrating the coaxiality of the stator and the rotor is achieved.

Description

Technical Field

[0001] This utility model relates to motor manufacturing, specifically a device for calibrating the coaxiality of the stator and rotor of a permanent magnet synchronous motor. Background Technology

[0002] Permanent magnet synchronous motors mainly consist of a stator and a rotor. The stator is a stationary component that generates a rotating magnetic field by passing three-phase alternating current through its windings. The rotor contains permanent magnets and achieves energy conversion through the interaction of electromagnetic induction and the stator's magnetic field. It is a core drive component in industrial production, new energy vehicles, and other fields. The coaxiality of the stator and rotor directly affects the motor's operational stability. If the coaxiality deviation is too large, it will lead to uneven air gap, electromagnetic torque fluctuations, and problems such as vibration and noise, and accelerated bearing wear. In severe cases, it can shorten the motor's service life or even cause failure. In existing coaxiality calibration technologies, most methods first use coaxiality measuring devices such as dial indicators and laser alignment instruments to obtain deviation data, and then the operator manually completes the calibration by adjusting the end cover and bearing housing installation positions.

[0003] Existing technologies require manual calibration of stator-rotor coaxiality using a coaxiality measuring device, followed by manual calibration. Multiple measurements are then required to achieve the desired calibration, making the overall process complex and inefficient. Therefore, a coaxiality calibration device for permanent magnet synchronous motors is proposed to address these issues. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a coaxiality calibration device for permanent magnet synchronous motor stator and rotor. This device solves the problem mentioned in the background art that when manually calibrating the coaxiality of the stator and rotor, it is necessary to first use a coaxiality measuring device to measure, and then manually calibrate. After calibration, multiple measurements are required to achieve the desired calibration, resulting in a complex overall operation process and low work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a permanent magnet synchronous motor stator-rotor coaxiality calibration device, comprising a base, an annular frame connected to the base, a calibration component mounted on the annular frame, the calibration component comprising three fixed columns, all three fixed columns mounted on the annular frame, telescopic columns slidably sleeved on the fixed columns, a sliding rod horizontally slidably connected to the telescopic columns, an arc-shaped block connected to the sliding rod, a top frame connected to the top of the three telescopic columns, a second lead screw threadedly connected to the top frame, a slide frame vertically slidably connected between the three telescopic columns, and three connecting rods hinged to the bottom of the slide frame, the ends of the three connecting rods away from the slide frame being respectively hinged to the three sliding rods.

[0006] Preferably, the bottom end of the second lead screw is rotatably connected to the slide, and the top end of the second lead screw is connected to a handwheel. When the slide moves down, it can drive the three slide rods to move closer to each other through the three connecting rods.

[0007] Preferably, the base is provided with a positioning component, which includes two sliders, both of which are slidably connected to the base. A first lead screw is rotatably installed through the interior of the base. A fork is connected to the slider, and two pairs of rollers are rotatably installed on the fork. The two forks are mirror images of each other.

[0008] Preferably, both slide rods pass through the annular frame, the two forks are located inside the annular frame, the first lead screw is provided with two threaded grooves in opposite directions, the two sliders are respectively threadedly connected to the two threaded grooves of the first lead screw, and a crank is connected to one end of the first lead screw.

[0009] Preferably, the calibration assembly further includes an adjustment mechanism, which includes three pins. The fixed column has multiple first limiting holes, and the telescopic column has a second limiting hole. The three pins are horizontally slidably connected in the second limiting holes of the three telescopic columns, and the pins pass through one of the limiting holes of the fixed column.

[0010] Preferably, the adjusting mechanism further includes a fixed ring, which is fixedly connected to the outer wall of the three telescopic columns. A grooved ring is rotatably connected to the bottom surface of the fixed ring. The bottom of the grooved ring has three arc-shaped grooves. Sliding shafts are respectively connected to the three pins. The three sliding shafts are slidably connected to the three arc-shaped grooves. A handle is connected to the grooved ring. When the grooved ring rotates, it can drive the three sliding shafts to move outward synchronously through the three arc-shaped grooves.

[0011] Preferably, a sliding plate is slidably connected to the base, the sliding plate being used to feed the stator into the annular frame.

[0012] As can be seen from the above technical solutions, the permanent magnet synchronous motor stator-rotor coaxiality calibration device provided in the embodiments of this specification has at least the following beneficial effects:

[0013] 1. This utility model, through the cooperation of the positioning component and the calibration component, enables the positioning component to force the stator to accurately move to the positioning area through four pairs of rollers. After the four pairs of rollers clamp the stator, the stator is centered and stably held, avoiding the impact of stator offset on the coaxiality calibration accuracy of the stator and rotor. The calibration component clamps the rotor shaft synchronously through three arc blocks. When the rotor shaft is offset, the three arc blocks can forcibly straighten the rotor shaft, thereby ensuring the coaxiality of the rotor and stator, achieving the effect of stator and rotor coaxiality calibration. Compared with manually measuring coaxiality and then manually calibrating, this greatly improves the convenience of calibration operations and increases work efficiency.

[0014] 2. This utility model, through the setting of the adjustment mechanism, allows the operator to drive the three pins to be pulled out synchronously from the first limiting hole of the fixed column and the second limiting hole of the telescopic column by rotating the groove ring. This achieves the technical effect of simultaneously releasing the height limit of the three telescopic columns, and then the height of the telescopic columns can be adjusted. The operator can adjust the calibration operation height of the three arc blocks by adjusting the height of the three telescopic columns, thereby matching stator shafts of various different heights. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the positioning component structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the slider structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the calibration component structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the carriage structure in this utility model;

[0021] Figure 6 This is a schematic diagram of the adjustment mechanism in this utility model;

[0022] Figure 7 This is a schematic diagram of the pin structure in this utility model.

[0023] In the diagram: 1. Base; 2. Ring frame; 3. Slide plate; 4. Positioning assembly; 41. Slider; 42. Fork head; 43. Roller; 44. First lead screw; 45. Crank handle; 5. Calibration assembly; 51. Fixed column; 52. Telescopic column; 53. Top frame; 54. Slide rod; 55. Arc block; 56. Connecting rod; 57. Slide carriage; 58. Second lead screw; 59. Handwheel; 6. Adjustment mechanism; 61. Pin; 62. Slide shaft; 63. Fixed ring; 64. Groove ring; 65. Handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1-5 As shown, a permanent magnet synchronous motor stator-rotor coaxiality calibration device includes a base 1, an annular frame 2 connected to the base 1, a calibration component 5 mounted on the annular frame 2, and a calibration component 5 including three fixed columns 51, all three fixed columns 51 being mounted on the annular frame 2. Telescopic columns 52 are slidably sleeved on the fixed columns 51, and a sliding rod 54 is horizontally slidably connected through the telescopic columns 52. An arc-shaped block 55 is connected to the sliding rod 54. A top frame 53 is connected to the top of the three telescopic columns 52, and the top frame 53 is threaded with... The second lead screw 58 and the three telescopic columns 52 are vertically slidably connected to a slide 57. Three connecting rods 56 are hinged to the bottom of the slide 57, and the ends of the three connecting rods 56 away from the slide 57 are respectively hinged to three sliding rods 54. The bottom end of the second lead screw 58 is rotatably connected to the slide 57, and the top end of the second lead screw 58 is connected to a handwheel 59. When the slide 57 moves downward, it can drive the three sliding rods 54 to move closer to each other via the three connecting rods 56. The three fixed columns 51 are equidistantly distributed in a ring on the ring frame 2. The entire calibration assembly 5 provides stable support. The telescopic column 52 guides and limits the horizontal movement of the slide bar 54, restricting its movement to the horizontal direction and preventing offset during calibration. The inner arc surface of the arc block 55 matches the outer circular surface of the motor rotor shaft. When the three arc blocks 55 move synchronously, they form a three-point centering structure, ensuring the coaxiality accuracy of the calibration. The top frame 53 serves as the mounting carrier for the second lead screw 58, and its fixed connection with the telescopic column 52 makes the force on the second lead screw 58 more stable. The handwheel 59 is rotated... At this time, the second lead screw 58 drives the slide 57 to move vertically downward along the telescopic column 52 through the threaded transmission. During the downward movement of the slide 57, the three connecting rods 56 deflect at an angle due to the hinge relationship at both ends, converting the vertical displacement into the horizontal opposite displacement of the slide rod 54. Finally, the three arc blocks 55 synchronously clamp the rotor shaft. When the rotor shaft deviates, the three arc blocks 55 can forcibly straighten the rotor shaft, thereby ensuring the coaxiality of the rotor and stator, achieving the effect of coaxiality calibration of the stator and rotor, and the operation is relatively convenient.

[0027] Furthermore, a positioning component 4 is provided on the base 1. The positioning component 4 includes two sliders 41, both of which are slidably connected to the base 1. A first lead screw 44 is rotatably mounted inside the base 1. Forks 42 are connected to the sliders 41, and two pairs of rollers 43 are rotatably mounted on the forks 42. The two forks 42 are mirror images of each other. Two sliding rods 54 pass through the annular frame 2, and the two forks 42 are located inside the annular frame 2. The first lead screw 44 has two threaded grooves in opposite directions. The two sliders 41 are threadedly connected to the two threaded grooves of the first lead screw 44, respectively. One end of the first lead screw 44 is connected to a crank handle 45. The base 1 provides horizontal guidance and limit for the sliders 41 to prevent jamming or offset when the sliders 41 move. When the stator is placed inside the annular frame 2, the crank handle 45 is turned to rotate the first lead screw 44. Under the action of the bidirectional threads, the two sliders 41 move synchronously along the guide rail towards the center of the annular frame 2, causing the two forks 42 to move. 2. Simultaneously approaching the stator, the two pairs of rollers 43 on the fork head 42 are symmetrically distributed vertically. The two fork heads 42 clamp and position the stator from both sides through the rollers 43. At the same time, the central area of ​​the four pairs of rollers 43 is the positioning area. When the four pairs of rollers 43 apply pressure to the outer wall of the stator, if the stator is misaligned, the four pairs of rollers 43 can force the stator to move precisely to the positioning area. During this process, the outer wall of the stator slides along the rollers 43, reducing the sliding resistance and facilitating better adjustment of the stator's position. After the four pairs of rollers 43 clamp the stator, the stator is centered and stably clamped, avoiding the impact of stator misalignment on the coaxiality calibration accuracy of the stator and rotor. The center point of the positioning area of ​​the four pairs of rollers 43 and the center point of the clamping area of ​​the three arc blocks 55 are on the same axis, maintaining a high degree of coaxiality. Therefore, when the four pairs of rollers 43 clamp the stator and the three arc blocks 55 clamp the rotor shaft, the stator and rotor can be calibrated to a high degree of coaxiality.

[0028] In addition, a sliding plate 3 is slidably connected to the base 1. The sliding plate 3 is used to feed the stator into the ring frame 2. Pull the sliding plate 3 outward, place the stator on the sliding plate 3, and then push the sliding plate 3 to smoothly feed the stator into the positioning area inside the ring frame 2. After calibration, pull the sliding plate 3 outward to remove the stator, which improves the convenience of operation.

[0029] In this embodiment, the positioning component 4 and the calibration component 5 work together to enable the positioning component 4 to force the stator to move precisely to the positioning area through four pairs of rollers 43. After the four pairs of rollers 43 clamp the stator, the stator is centered and stably clamped, avoiding the impact of stator offset on the coaxiality calibration accuracy of the stator and rotor. The calibration component 5 clamps the rotor shaft synchronously through three arc blocks 55. When the rotor shaft is offset, the three arc blocks 55 can forcibly straighten the rotor shaft, thereby ensuring the coaxiality of the rotor and stator and achieving the effect of stator and rotor coaxiality calibration. Compared with manually measuring the coaxiality and then manually calibrating, this greatly improves the convenience of the calibration operation and increases the work efficiency.

[0030] Example 2

[0031] Please see Figure 1 , Figure 6 , Figure 7 As shown, the calibration component 5 also includes an adjustment mechanism 6, which includes three pins 61. The fixed column 51 has multiple first limiting holes, and the telescopic column 52 has second limiting holes. The three pins 61 are horizontally slidably connected within the second limiting holes of the three telescopic columns 52, and the pins 61 also pass through one of the limiting holes of the fixed column 51. The sliding sleeve structure between the fixed column 51 and the telescopic column 52 allows for flexible adjustment of the extension height of the telescopic column 52 according to the axial length of the motor's stator and rotor. The multiple first limiting holes on the fixed column 51 are equidistantly distributed along its axial direction. The spacing between adjacent first limiting holes is designed based on the axial dimension differences of common motor stators and rotors to ensure that the telescopic column 52 has sufficient limiting stops when adjusting its height. Position selection: The second limiting hole on the telescopic column 52 is adapted to the diameter of the first limiting hole. When it is necessary to adjust the length of the telescopic column 52 extending out of the fixed column 51, the pin 61 is first pulled out from the second limiting hole and the corresponding first limiting hole. At this time, the telescopic column 52 can slide freely along the inner wall of the fixed column 51. After adjusting to the position that matches the height of the motor stator and rotor, the pin 61 is then horizontally inserted into the aligned limiting hole. Through the axial limiting effect of the pin 61, the relative sliding between the telescopic column 52 and the fixed column 51 is restricted, thereby fixing the height of the telescopic column 52. This allows the operator to adjust the calibration working height of the three arc blocks 55 by adjusting the height of the three telescopic columns 52, thereby matching various stator shafts of different heights.

[0032] It is worth mentioning that the adjustment mechanism 6 also includes a fixed ring 63, which is fixedly connected to the outer wall of the three telescopic columns 52. A grooved ring 64 is rotatably connected to the bottom surface of the fixed ring 63. The bottom of the grooved ring 64 has three arc-shaped grooves. Sliding shafts 62 are connected to the three pins 61 respectively. The three sliding shafts 62 are slidably connected to the three arc-shaped grooves. A handle 65 is connected to the grooved ring 64. When the grooved ring 64 rotates, it can drive the three sliding shafts 62 to move outward synchronously through the three arc-shaped grooves. The fixed ring 63 is fixed to the three telescopic columns 52, which not only provides rotational support for the grooved ring 64, but also enhances the structural integrity between the three telescopic columns 52. The three arc-shaped grooves at the bottom of the grooved ring 64 are distributed in a ring at equal intervals. The trajectory of the arc-shaped grooves is designed to extend from the center of the grooved ring 64 outwards. The gradual curve away from the center of the groove ring 64, when the handle 65 is held and the groove ring 64 is rotated clockwise or counterclockwise, the inner wall of the arc-shaped groove will generate a horizontal thrust on the sliding shaft 62. Since the three arc-shaped grooves are completely identical in structure and rotate synchronously, the three sliding shafts 62 will move outward synchronously in the horizontal direction under the action of the thrust, thereby driving the three pins 61 connected to the sliding shafts 62 to be pulled out synchronously from the first limiting hole of the fixed column 51 and the second limiting hole of the telescopic column 52, realizing the technical effect of synchronously releasing the height limit of the three telescopic columns 52. Then the height of the telescopic column 52 can be adjusted. After the adjustment is completed, rotating the groove ring 64 in the opposite direction will drive the three pins 61 to be inserted into the three first limiting holes and the second limiting holes again, improving the efficiency of the height adjustment of the telescopic column 52.

[0033] In this embodiment, by adjusting the mechanism 6, the operator can rotate the groove ring 64 to drive the three pins 61 to be pulled out simultaneously from the first limiting hole of the fixed column 51 and the second limiting hole of the telescopic column 52, thereby achieving the technical effect of simultaneously releasing the height limit of the three telescopic columns 52. Then the height of the telescopic columns 52 can be adjusted. The operator can adjust the calibration operation height of the three arc blocks 55 by adjusting the height of the three telescopic columns 52, thereby matching stator shafts of various different heights.

[0034] In use, the coaxiality calibration device for the stator and rotor of this permanent magnet synchronous motor is operated by pulling out the sliding plate 3 slidably connected to the base 1, placing the stator on the sliding plate 3, and then pushing the sliding plate 3 to smoothly feed the stator into the annular frame 2. Subsequently, the first lead screw 44 is rotated by the crank handle 45. Because the first lead screw 44 has two oppositely oriented threaded grooves, and the two sliders 41 are threadedly connected to these two grooves respectively, the two sliders 41 will move synchronously towards the center of the annular frame 2 along the guide structure of the base 1. The two mirror-shaped forks 42 connected to the sliders 41 will then approach the stator. The two pairs of rollers 43 rotatably mounted on the forks 42 will contact the outer wall of the stator. Through the combined action of the four pairs of rollers 43, the stator is forced to accurately move to the positioning area. To achieve the centering and stable clamping of the stator, the second lead screw 58 is rotated by handwheel 59. The second lead screw 58 drives the slide 57 to move vertically downward along the telescopic column 52. The three connecting rods 56 hinged at the bottom of the slide 57 deflect at an angle. Through the hinge point of the connecting rod 56 away from the slide 57, the slide rod 54 moves towards each other. The arc block 55 connected to the slide rod 54 clamps the rotor shaft synchronously. If the rotor shaft is offset, the three arc blocks 55 will force the rotor shaft to be aligned. Finally, the coaxiality of the stator and rotor is calibrated. After calibration, the handwheel 59 is rotated in the opposite direction to release the rotor shaft by the arc block 55. The rocker handle 45 is rotated in the opposite direction to release the stator by the roller 43. Then, the slide plate 3 can be pulled out to remove the calibrated stator and rotor.

[0035] If the working height of the calibration component 5 needs to be adjusted according to the height of the motor stator and rotor, hold the handle 65 on the groove ring 64 in the adjustment mechanism 6 and rotate the groove ring 64. The three arc-shaped grooves at the bottom of the groove ring 64 slide and engage with the sliding shaft 62 connected to the pin 61, causing the three sliding shafts 62 to move outward synchronously. This causes the three pins 61 to be pulled out from the second limiting hole of the telescopic column 52 and the first limiting hole of the fixed column 51, respectively, releasing the height limit of the telescopic column 52. After sliding the telescopic column 52 along the fixed column 51 to the appropriate height, rotate the groove ring 64 in the opposite direction to re-insert the pins 61 into the aligned limiting holes to fix the height of the telescopic column 52.

[0036] The above embodiments are only used to illustrate the present utility model, and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A permanent magnet synchronous motor stator-rotor coaxiality calibration device, comprising a base (1), characterized in that: The base (1) is connected with an annular frame (2), the annular frame (2) is provided with a calibration assembly (5), the calibration assembly (5) comprises three fixed columns (51), three fixed columns (51) are installed on the annular frame (2), the telescopic column (52) is slidably connected to the fixed column (51), the telescopic column (52) is slidably connected with a slide bar (54), the slide bar (54) is connected with an arc block (55), the top of the three telescopic columns (52) is connected with a top frame (53), the second lead screw (58) is threadedly connected to the top frame (53), the slide (57) is slidably connected between the three telescopic columns (52), the bottom of the slide (57) is hingedly connected with three connecting rods (56), the ends of the three connecting rods (56) away from the slide (57) are respectively hingedly connected with the three slide bars (54). The base (1) is provided with a positioning assembly (4), the positioning assembly (4) comprises two sliding blocks (41), two sliding blocks (41) are slidably connected to the base (1), the first lead screw (44) is rotatably installed in the base (1), the fork head (42) is connected to the sliding block (41), the fork head (42) is rotatably installed with two pairs of rollers (43), two fork heads (42) are mirror image arranged.

2. The permanent magnet synchronous motor stator-rotor coaxiality calibration device according to claim 1, characterized in that: The bottom end of the second lead screw (58) is rotatably connected with the slide (57), the top end of the second lead screw (58) is connected with a hand wheel (59), when the slide (57) moves downward, the three connecting rods (56) can drive the three slide bars (54) to move towards each other.

3. The permanent magnet synchronous motor stator-rotor coaxiality calibration device according to claim 2, characterized in that: Two slide bars (54) penetrate the annular frame (2), two fork heads (42) are located inside the annular frame (2), the first lead screw (44) is provided with two opposite threaded grooves, two sliding blocks (41) are threadedly connected with the two threaded grooves of the first lead screw (44), one end of the first lead screw (44) is connected with a rocking handle (45).

4. The permanent magnet synchronous motor stator-rotor coaxiality calibration device according to claim 3, characterized in that: The calibration assembly (5) further comprises an adjusting mechanism (6), the adjusting mechanism (6) comprises three pin shafts (61), a plurality of first limiting holes are formed in the fixed column (51), second limiting holes are formed in the telescopic column (52), three pin shafts (61) are respectively slidably connected in the second limiting holes of the three telescopic columns (52), and the pin shaft (61) penetrates one of the limiting holes of the fixed column (51).

5. A permanent magnet synchronous motor stator-rotor coaxiality calibration device according to claim 4, characterized in that: The adjusting mechanism (6) further comprises a fixed ring (63), the fixed ring (63) is fixedly connected to the outer wall of the three telescopic columns (52), the bottom surface of the fixed ring (63) is rotatably connected with a groove ring (64), three arc grooves are formed in the bottom of the groove ring (64), three pin shafts (61) are respectively connected with slide shafts (62), and three slide shafts (62) are slidably connected with the three arc grooves, the groove ring (64) is connected with a handle (65), and when the groove ring (64) rotates, the three slide shafts (62) can be driven to move outward synchronously through the three arc grooves.

6. A permanent magnet synchronous motor stator-rotor coaxiality calibration device according to claim 3, characterized in that: The base (1) is slidably connected with a slide plate (3), and the slide plate (3) is used for sending the stator into the annular frame (2).

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