Stator phase alignment device for new energy vehicle electric drive assembly

Abstract

The invention discloses a stator phase alignment device for electric drive assembly of a new energy vehicle, which is characterized in that a rotary supporting seat for vertically placing a stator is arranged based on a bottom plate and is driven by a rotary driving mechanism, and one side of the rotary supporting seat is provided with a sensing element for detecting the circumferential position of a phase groove in the stator; the sensing element controls the rotation driving mechanism to start and stop through the control element according to the circumferential position of the phase groove. The structure is simple, the cost is low, the combination of the sensing element, the control element, the rotary driving mechanism and the rotary supporting seat is used for replacing manual observation and rotary adjustment of the circumferential position of the phase groove, the phase requirement during stator hot jacket is met, the labor intensity of workers is reduced, the phase alignment difficulty during stator hot jacket is reduced, and the working efficiency is improved. The production efficiency and the reliability and the stability of phase alignment during stator shrinkage fit are improved; the problem that phase alignment is difficult during stator shrinkage fit at present can be effectively solved, and the effects of reducing the phase alignment difficulty of the stator shrinkage fit and improving the motor quality are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of motor assembly devices, and particularly relates to a stator phase alignment device for new energy vehicle electric drive assembly. Background Art

[0002] The electric drive system is one of the important components of new energy vehicles, and the core component of the electric drive system is the motor. Therefore, the quality of the motor is crucial for the performance and comfort of new energy vehicles. The motor mainly consists of a housing, a stator, and a rotor. The stator includes a stator core and a stator winding embedded in the stator slots inside the stator core. One end of the stator winding is fixedly provided with a terminal for connecting the lead wire; stator shrink fitting is a common assembly process in motor manufacturing. Based on the principle of thermal expansion and contraction, the housing is first heated to a certain temperature to increase its inner diameter, and then the housing is quickly sleeved outside the stator. As the housing cools and contracts, an interference fit is formed between the inner wall of the housing and the stator core. The factor that is likely to affect the quality of the motor during stator shrink fitting is the relative position between the stator and the housing in the circumferential direction. If the relative position between the stator and the housing is inaccurate, it is not only easy to cause poor motor running balance due to uneven magnetic field distribution, resulting in increased vibration and noise, and even affecting the service life of the motor, but also may affect the layout of the lead wires of the stator winding and the connection with the external circuit, resulting in interference between the lead wires and the housing or other components, and even damaging the stator winding. Therefore, in order to ensure the balance of motor operation and the correct connection of the lead wires, there are phase requirements during stator shrink fitting, that is, the stator and the housing need to be sleeved according to a specific relative position in the circumferential direction.

[0003] At present, generally, an axially extending phase slot is opened on the outer surface of the stator core, and a corresponding phase rib is arranged on the inner wall of the casing. When assembling, the stator is first placed on a stator shrink-fit positioning tool such as disclosed in Chinese patent CN209313650U and Chinese patent CN222381491U, and the direction of the phase slot is manually observed and adjusted so that the phase slot is aligned with the phase rib of the casing clamped by the equipment above the stator, and then the equipment clamps the casing and presses it down and puts it outside the stator. However, this process relies on manual observation and adjustment of the direction of the phase slot, which not only has high labor intensity and low production efficiency, but also has uneven quality of phase alignment and a high probability of error. Chinese patent CN217717519U discloses a multi-station visual inspection system for automobile motor stators. The scheme is to set an industrial camera on the side of the manipulator that clamps the housing, and set a square glass and a light source on the side of the tooling where the stator is placed, so that the industrial camera can take a side image of the stator when the manipulator clamps the housing, so as to obtain the direction of the phase slot on the side of the stator and adjust the housing accordingly, so as to meet the phase requirements of the stator shrink sleeve; but this scheme has high requirements on the stability of the movement of the manipulator clamping the housing and the accuracy of the industrial camera in obtaining the direction of the phase slot. It is not only less reliable, but also more expensive and less practical. Therefore, it is necessary to design a simple and reliable stator phase alignment device to ensure the quality of the motor and improve the performance and comfort of new energy vehicles. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a stator phase alignment device for electric drive assembly of new energy vehicles, so as to solve the technical problem that phase alignment is difficult during stator shrink-fitting, thereby reducing the difficulty of phase alignment during stator shrink-fitting and improving the quality of the motor.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A stator phase alignment device for electric drive assembly of new energy vehicles comprises a laterally arranged base plate, a rotating support seat is horizontally rotatably connected above the base plate, the rotating support seat is used to place the stator vertically, a rotating drive mechanism is provided on the base plate which is transmission-connected to the rotating support seat, the rotating drive mechanism is used to drive the rotating support seat to rotate horizontally, a sensing element facing the rotating support seat is provided on the base plate on one circumferential side of the rotating support seat, the sensing element is electrically connected to the rotating drive mechanism through a control element, the sensing element is used to detect the circumferential position of a phase slot on the stator and control the start and stop of the rotating drive mechanism through the control element according to the circumferential position, when the circumferential position of the phase slot on the stator does not match the position required for the stator shrink fit, the sensing element controls the rotating drive mechanism to start through the control element, and when the circumferential position of the phase slot on the stator matches the position required for the stator shrink fit, the sensing element controls the rotating drive mechanism to stop through the control element.

[0006] Further, the rotary support base is a cylindrical structure with a closed lower end and an open upper end, and the inner diameter of the rotary support base is adapted to the radial dimension of the stator winding.

[0007] Further, there are a plurality of circumferentially evenly distributed relief notches on the side wall of the rotary support base, and the relief notches extend downward from the upper end.

[0008] Further, the material of the rotary support base is nylon or fiberglass.

[0009] Further, the rotary drive mechanism is a vertically arranged motor, the motor is fixedly connected below the bottom plate, and the output shaft of the motor movably penetrates through the bottom plate and is synchronously rotationally connected with the rotary support base.

[0010] Further, a bearing is provided between the bottom plate and the rotary support base, the bearing is coaxial with the output shaft of the motor, the inner ring of the bearing is fixedly connected with the bottom plate, and the outer ring of the bearing is fixedly connected with the rotary support base.

[0011] Further, the sensing element is a distance sensor, the sensing element is mounted on the bottom plate through a connecting frame, and the control element is a PLC or a single-chip microcomputer.

[0012] Further, the sensing element is an industrial camera, the sensing element is mounted on the bottom plate through a connecting frame, and the control element is a single-chip microcomputer.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The stator phase alignment device for new energy vehicle electric drive assembly of the present invention is based on a bottom plate and is provided with a rotary support base for vertically placing the stator and capable of driving the stator to rotate together. The rotary support base is driven by a rotary drive mechanism. A sensing element for detecting the circumferential position of the phase slot on the stator is arranged on one side of the rotary support base. The sensing element controls the start and stop of the rotary drive mechanism through a control element according to the circumferential position of the phase slot on the stator; not only is the structure simple and the cost low, but also the combination of the sensing element, the control element, the rotary drive mechanism and the rotary support base is used to replace manual observation and rotation adjustment of the circumferential position of the phase slot to meet the phase requirements during the hot sleeving of the stator, which is beneficial to reducing the manual labor intensity and the difficulty of phase alignment during the hot sleeving of the stator, improving the production efficiency, as well as the reliability and stability of phase alignment during the hot sleeving of the stator; the present invention can effectively solve the problem that it is difficult to align the phase during the hot sleeving of the stator at present, and achieve the effects of reducing the difficulty of phase alignment during the hot sleeving of the stator and improving the quality of the motor. Description of the Drawings

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the stator phase alignment device described in the embodiment; Figure 2 It is a schematic diagram of the use state of the stator phase alignment device described in the embodiment; Among them, there are a base plate 1, a rotating support seat 2, a motor 3, an induction element 4, a bearing 5, a connecting frame 6, a clearance gap 7, a stator 8, a phase slot 9, a stator winding 10, a stator core 11, and a terminal 12. DETAILED DESCRIPTION

[0015] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] Example: See also Figure 1 and Figure 2 , a stator phase alignment device for electric drive assembly of new energy vehicles, comprising a transversely arranged base plate 1, a rotating support seat 2 is horizontally rotatably connected above the base plate 1, the rotating support seat 2 is used to vertically place a stator 8, a rotating drive mechanism is provided on the base plate 1 and is transmission-connected to the rotating support seat 2, the rotating drive mechanism is used to drive the rotating support seat 2 to rotate horizontally, a sensing element 4 is provided on the base plate 1 on one circumferential side of the rotating support seat 2, the sensing element 4 is electrically connected to the rotating drive mechanism through a control element, the sensing end of the sensing element 4 is higher than the rotating support seat 2 and is arranged toward the rotating support seat 2, the sensing element 4 is used to detect the circumferential position of the phase slot 9 on the stator 8 and control the start and stop of the rotating drive mechanism through the control element according to the circumferential position, when the circumferential position of the phase slot 9 on the stator 8 does not match (does not overlap) the position required for the stator shrink sleeve, the sensing element 4 controls the rotating drive mechanism to start through the control element, and when the circumferential position of the phase slot 9 on the stator 8 matches (overlaps) the position required for the stator shrink sleeve, the sensing element 4 controls the rotating drive mechanism to stop through the control element; Among them, the base plate 1 is fixedly arranged under the clamping device for vertically moving the casing through a bracket or a workbench, the stator 8 includes a stator core 11 and a stator winding 10 embedded in the stator slot inside the stator core 11, and a terminal 12 is fixedly arranged at one end of the stator winding 10 for connecting the lead wire. The required position of the stator shrink fit refers to the position vertically opposite to the phase rib in the casing that is correctly clamped by the clamping device.

[0017] The stator phase alignment device for the electric drive assembly of a new energy vehicle of the present invention is shown in Figure 1 and Figure 2, during use, the stator 8 is vertically placed on the rotary support base 2 manually or by mechanical equipment. The sensing element 4 detects the circumferential position of the phase slot 9 on the stator 8 in real time and transmits the detection result to the control element. The detection result can be numerical data, image data or a switching signal. Numerical data, image data or a switching signal corresponding to the required position for hot sleeving the stator is preset in the control element. The control element compares the numerical data or image data from the sensing element 4 with the numerical data or image data preset in itself, and controls the start and stop of the rotary drive mechanism according to the comparison result, or directly controls the start and stop of the rotary drive mechanism according to the switching signal from the sensing element 4; when the circumferential position of the phase slot 9 on the stator 8 does not match the required position for hot sleeving the stator, the sensing element 4 controls the start of the rotary drive mechanism through the control element. The rotary drive mechanism drives the rotary support base 2 to rotate, and the stator 8 on the rotary support base 2 rotates accordingly, causing the circumferential position of the phase slot 9 to change. When the circumferential position of the phase slot 9 on the stator 8 matches the required position for hot sleeving the stator, the sensing element 4 controls the stop of the rotary drive mechanism through the control element. At this time, the heated and expanded housing can be moved downward by the clamping device and sleeved outside the stator 8 to complete the hot sleeving of the stator.

[0018] The stator phase alignment device for new energy vehicle electric drive assembly according to the present invention is based on the base plate 1 and is provided with a rotary support base 2 for vertically placing the stator 8 and capable of driving the stator 8 to rotate together. The rotary support base 2 is driven by a rotary drive mechanism. A sensing element 4 for detecting the circumferential position of the phase slot 9 on the stator 8 is arranged on one side of the rotary support base 2. The sensing element 4 controls the start and stop of the rotary drive mechanism through the control element according to the circumferential position of the phase slot 9 on the stator 8; not only is the structure simple and the cost low, but also the combination of the sensing element 4, the control element, the rotary drive mechanism and the rotary support base 2 is used to replace manual observation and rotation adjustment of the circumferential position of the phase slot 9 to meet the phase requirements during hot sleeving of the stator, which is beneficial to reducing the manual labor intensity and the difficulty of phase alignment during hot sleeving of the stator, improving the production efficiency, as well as the reliability and stability of phase alignment during hot sleeving of the stator; in summary, the present invention can effectively solve the problem of great difficulty in phase alignment during hot sleeving of the stator at present, and achieve the effects of reducing the difficulty of phase alignment during hot sleeving of the stator and improving the quality of the motor 3.

[0019] Please refer to Figure 1 and Figure 2, the rotating support base 2 is a cylindrical structure with a closed lower end and an open upper end. The inner diameter of the rotating support base 2 is smaller than the outer diameter of the stator core 11 and is adapted to the maximum radial dimension of the stator winding 10. In this way, when placing the stator 8, the stator winding 10 is inserted into the inner side of the rotating support base 2, realizing the lateral positioning of the stator 8, ensuring that the stator 8 is vertically aligned with the housing clamped directly above, and avoiding deviations during manual placement and offsets during the hot sleeving of the stator. The lower end of the stator core 11 abuts against the upper end of the rotating support base 2, realizing the vertical positioning of the stator 8 and ensuring the vertical movement stroke coordination with the housing to complete the hot sleeving of the stator.

[0020] Since the stator 8 rotates with the rotating support base 2 by the frictional force generated by the abutment of the stator core 11 and the end face of the rotating support base 2, in order to ensure the effectiveness of the rotation of the stator 8 with the rotating support base 2, not only should the rotating drive mechanism drive the rotating support base 2 to rotate at a slower speed, but also the upper end face of the rotating support base 2 should have a greater roughness. In this embodiment, the rotating support base 2 is made of nylon or fiberglass, which not only facilitates making the upper end face of the rotating support base 2 have a greater roughness, but also the strength and high-temperature resistance can meet the requirements of the stator hot sleeving.

[0021] Since in the stator 8 of some motors 3, there is a situation where the terminal 12 at the end of the stator winding 10 extends radially outside the stator winding 10, therefore, please refer to Figure 1 and Figure 2 , the side wall of the rotating support base 2 designed in the present invention has a plurality of circumferentially evenly distributed relief notches 7, and the relief notches 7 extend downward from the upper end. In this way, the relief notches 7 can not only make way for the terminal 12 at the end of the stator winding 10 when placing the stator 8 to ensure that the stator winding 10 is smoothly inserted into the rotating support base 2 to realize lateral positioning, but also the relief notches 7 are beneficial to reducing the weight of the rotating support base 2, thereby reducing the power consumption of the operation of this stator phase alignment device and reducing the production cost.

[0022] Please refer to Figure 1 and Figure 2 , the rotating drive mechanism is a vertically arranged motor 3. The motor 3 is fixedly connected below the bottom plate 1, and the output shaft of the motor 3 movably penetrates through the bottom plate 1 and is synchronously rotationally connected with the rotating support base 2. In this way, by directly driving the rotating support base 2 with the motor 3, the structure of this stator phase alignment device is simpler and more reliable. In order to avoid the accidental rotation of the motor 3 and the rotating support base 2 after the control element controls the motor 3 to stop when the phase slot 9 on the stator 8 rotates into place, a stepping motor that can be self-locked after the control stops can be used, or a mechanical brake or an electromagnetic brake adapted to the output shaft of the motor 3 can be set to keep the motor 3 stationary after the control element controls the stop.

[0023] Please refer to Figure 1 and Figure 2, a bearing 5 is provided between the bottom plate 1 and the rotary support base 2. The bearing 5 is coaxial with the output shaft of the motor 3. The inner ring of the bearing 5 is fixedly connected to the bottom plate 1, and the outer ring of the bearing 5 is fixedly connected to the rotary support base 2. In this way, the rotary support base 2 is rotationally connected to the bottom plate 1 through the bearing 5. Compared with only being connected to the output shaft of the motor 3, not only is the structure more stable and reliable, but also the rotary support base 2 can rotate more stably.

[0024] Please refer to Figure 1 and Figure 2 , in this embodiment, the sensing element 4 is a distance sensor, and specifically, an ultrasonic distance sensor, an infrared distance sensor, a laser distance sensor or a photoelectric distance sensor can be used. The sensing element 4 is installed on the bottom plate 1 through a connecting frame 6, and the control element is a PLC (not shown in the figure). In this embodiment, the sensing end of the distance sensor should be radially opposite to the position required for the stator hot sleeve on the rotary support base 2. When the circumferential position of the phase slot 9 on the stator 8 coincides with the position required for the stator hot sleeve, the distance detected by the distance sensor from the bottom surface of the phase slot 9 is set as the trigger distance of the distance sensor. In this way, after the stator 8 is placed on the rotary support base 2, the distance sensor continuously detects the distance from the stator core 11. When the circumferential position of the phase slot 9 on the stator 8 does not coincide with the position required for the stator hot sleeve, the distance detected by the distance sensor is the distance to the outer cylindrical surface of the stator core 11, and this distance is less than the trigger distance. Correspondingly, the control element controls the motor 3 to start running, so that the stator 8 rotates slowly. When the circumferential position of the phase slot 9 on the stator 8 coincides with the position required for the stator hot sleeve, the distance detected by the distance sensor is the distance to the bottom surface of the phase slot 9, and this distance is the same as the trigger distance. Correspondingly, the control element controls the motor 3 to stop running, so that the stator 8 stops, ensuring that when the stator hot sleeve is carried out, the phase slot 9 on the stator 8 is vertically aligned with the phase rib in the machine shell. It can be understood that a start switch for controlling the power-on and power-off of the distance sensor or the control element should also be set, or a start distance is preset. The start distance is the distance from the distance sensor to the outer cylindrical surface of the stator core 11, so that the rotary support base 2 is in a stationary state before the stator 8 is placed, so as to accurately place the stator 8 on the rotary support base 2.

[0025] During implementation, the sensing element 4 can also be an industrial camera. Correspondingly, the control element is a single-chip microcomputer. The industrial camera continuously takes pictures of the stator 8 rotating with the rotary table. The control element compares the real-time pictures with the pictures of the stator 8 in the phase-aligned state preset. If the comparison is consistent, it indicates that the circumferential position of the phase slot 9 matches the position required for the stator hot sleeve. The control element controls the motor 3 to stop running. If not, it controls the motor 3 to run. Or after the stator 8 is placed on the rotary support 2, the motor 3 drives the rotary support 2 to rotate, thus driving the stator 8 to rotate. By continuously taking pictures with the industrial camera, the position of the phase slot 9 is found. When the phase slot 9 appears in the field of view of the industrial camera, the motor 3 pauses rotation. The control element calculates the angle between the phase slot 9 and the position required for the stator hot sleeve based on the current picture taken by the industrial camera, and obtains the angle that the stator 8 still needs to rotate. The control element controls the motor 3 to continue rotating by the corresponding angle, so that the circumferential position of the phase slot 9 matches the position required for the stator hot sleeve to meet the requirements of the stator hot sleeve.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the purpose and scope of the present technical solution should be covered by the scope of the claims of the present invention.

Claims

1. A stator phase alignment device for electric drive assembly of new energy vehicles, characterized by: It includes a laterally arranged base plate, a rotating support seat is horizontally rotatably connected above the base plate, the rotating support seat is used to place the stator vertically, a rotating drive mechanism is provided on the base plate which is transmission-connected to the rotating support seat, the rotating drive mechanism is used to drive the rotating support seat to rotate horizontally, a sensing element facing the rotating support seat is provided on the base plate on one circumferential side of the rotating support seat, the sensing element is electrically connected to the rotating drive mechanism through a control element, the sensing element is used to detect the circumferential position of the phase slot on the stator and control the start and stop of the rotating drive mechanism through the control element according to the circumferential position, when the circumferential position of the phase slot on the stator does not match the position required for the stator shrink fit, the sensing element controls the rotating drive mechanism to start through the control element, and when the circumferential position of the phase slot on the stator matches the position required for the stator shrink fit, the sensing element controls the rotating drive mechanism to stop through the control element.

2. According to claim 1, a stator phase alignment device for electric drive assembly of a new energy vehicle is characterized in that: The rotating support seat is a cylindrical structure with a closed lower end and an open upper end, and the inner diameter of the rotating support seat is matched with the radial size of the stator winding.

3. According to claim 2, a stator phase alignment device for electric drive assembly of new energy vehicles is characterized by: The side wall of the rotating support seat is provided with a plurality of circumferentially evenly distributed clearance notches, and the clearance notches extend downward from the upper end.

4. According to claim 1, a stator phase alignment device for electric drive assembly of a new energy vehicle is characterized in that: The material of the rotating support seat is nylon or fiberglass.

5. According to claim 1, a stator phase alignment device for electric drive assembly of a new energy vehicle is characterized in that: The rotary drive mechanism is a vertically arranged motor, which is fixedly connected below the bottom plate, and the output shaft of the motor movably penetrates the bottom plate and is synchronously rotated with the rotary support seat.

6. According to claim 5, a stator phase alignment device for electric drive assembly of new energy vehicles is characterized by: A bearing is arranged between the bottom plate and the rotating support seat, the bearing is coaxial with the output shaft of the motor, the inner ring of the bearing is fixedly connected to the bottom plate, and the outer ring of the bearing is fixedly connected to the rotating support seat.

7. According to claim 1, a stator phase alignment device for electric drive assembly of a new energy vehicle is characterized by: The sensing element is a distance sensor, which is mounted on the bottom plate through a connecting frame, and the control element is a PLC or a single-chip microcomputer.

8. According to claim 1, a stator phase alignment device for electric drive assembly of a new energy vehicle is characterized by: The sensing element is an industrial camera, which is mounted on a bottom plate through a connecting frame, and the control element is a single-chip microcomputer.

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