Motor iron core ventilation slot detection device
By combining the rotating ring and the ventilation slot positioning mechanism, continuous detection of ventilation slots in the motor core and effective detection of blockages are achieved, solving the problems of low detection efficiency and poor quality in the existing technology, and improving detection efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGXIANG JUFENG TECH CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-19
AI Technical Summary
Existing methods for detecting ventilation slots in motor cores require the ventilation slot plates to be kept vertical for accurate detection, and they are difficult to detect small foreign objects inside the ventilation slots, resulting in low detection efficiency and poor quality.
By employing a rotating ring and ventilation slot positioning mechanism, continuous positioning and detection of multiple ventilation slots can be achieved. Furthermore, the combination of a ring-shaped ultraviolet lamp, an industrial camera, and a fluorescent coating allows for a direct visualization of blockages, thereby improving detection quality.
It enables continuous detection of multiple ventilation slots, improving detection efficiency and effectively detecting blockages in the ventilation slots, avoiding omissions.
Smart Images
Figure CN224262443U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor core technology, and specifically to a motor core ventilation slot detection device. Background Technology
[0002] The motor core, typically composed of laminated silicon steel sheets with good magnetic permeability, is a crucial component of the motor's magnetic circuit system. Depending on the type and application of the motor, the core takes various forms, primarily including the stator core and the rotor core. The stator core is stationary and responsible for generating the rotating magnetic field, while the rotor core rotates with the motor, cutting the stator magnetic field to generate induced current, thus achieving the conversion between electrical and mechanical energy. As the motor operates, the stator core generates heat. The stator core usually employs a laminated structure, with specially designed ventilation slots during the lamination process. These ventilation slots allow cooling media to flow axially or radially through the core laminations, carrying away heat and ensuring the motor operates within a safe temperature range. The quality of the ventilation slots directly affects the motor's heat dissipation efficiency and operational reliability; therefore, the ventilation slots need to be inspected for dimensions and foreign objects after leaving the factory. The existing technology has the following problems:
[0003] Existing detection methods require the ventilation slots to be kept vertical and parallel to the camera for accurate results. However, they often only allow for the positioning and detection of one stator core ventilation slot at a time, requiring disassembly and replacement after each detection, which affects efficiency. In addition, existing methods often use industrial cameras to take pictures and analyze the slot width using image processing algorithms to achieve rapid detection. However, this method cannot detect small foreign objects in the ventilation slots in time, which can lead to omissions and affect the quality of detection. Utility Model Content
[0004] This invention provides a device for detecting ventilation slots in motor cores to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A device for detecting ventilation slots in motor cores includes a detection base. A placement mechanism is located on the top of the detection base. Four ventilation slot positioning mechanisms are arranged in a circular array at the eccentric top of the placement mechanism. A blockage detection mechanism is located at the center of the top of the placement mechanism. A display mechanism is located on the rear side of the placement mechanism. A servo motor, including an encoder, is fixedly mounted on the front left of the top of the detection base. The output shaft of the servo motor is fixedly mounted with a drive gear. The placement mechanism includes a rotating ring and a fixed column. The fixed column is located within the inner ring of the rotating ring. The rotating ring is movably connected to the top of the detection base. The fixed column is fixedly connected to the top of the detection base. A driven gear ring is fixedly mounted on the upper outer wall of the rotating ring. The drive gear meshes with the driven gear ring. A vertical plate is fixedly mounted on the front top of the fixed column. An industrial camera is fixedly mounted on the front side of the vertical plate, located behind one of the four ventilation slot positioning mechanisms.
[0007] A further improvement of the present invention is that: each of the four ventilation slot positioning mechanisms includes a base plate, the base plate is fixedly installed on the top of the rotating ring, two semi-cylinders are fixedly installed at the top center of the base plate, an L-shaped bracket is fixedly installed on the top of the base plate, and a limit block is fixedly installed on the side of the outer wall of the two semi-cylinders near the vertical position of the L-shaped bracket.
[0008] A further improvement of this utility model is that: a threaded hole is provided at the horizontal position of the L-shaped bracket, a threaded rod is installed on the inner ring of the threaded hole, a knob is fixedly installed on the top of the threaded rod, a pressure plate is movably installed on the bottom end of the threaded rod, and two pressure columns are fixedly installed on the bottom of the pressure plate.
[0009] A further improvement of the present invention is that: a limiting slide rod is fixedly installed on the top of the pressure plate, the limiting slide rod is slidably connected to the horizontal part of the L-shaped bracket, and a ventilation slot is provided between the opposing surfaces of the pressure column and the semi-cylinder, and the ventilation slot is arranged in a ring array with a number of ventilation slots that are connected front and back.
[0010] A further improvement of this utility model is that: the blockage detection mechanism includes a second upright plate, which is fixedly installed on the top rear side of the fixed column. An electric push rod is fixedly installed on the rear side of the second upright plate. A circular lighting shell is fixedly installed at the output end of the electric push rod. An annular ultraviolet lamp is fixedly installed in the inner cavity of the circular lighting shell. An industrial camera is fixedly installed in the inner ring of the annular ultraviolet lamp. The diameter of the circular lighting shell is the same as the diameter of the ventilation slot.
[0011] A further improvement of the present invention is that the display mechanism includes a third upright plate, which is fixedly installed on the top rear side of the detection base. A self-locking cylinder is fixedly installed on the rear side of the third upright plate. The output end of the self-locking cylinder extends through to the front side of the third upright plate and is fixedly installed with a push plate. The front side of the push plate is fixedly coated with a fluorescent coating. The push plate is located behind the circular illumination shell and the L-shaped bracket.
[0012] A further improvement of this utility model is that a limiting slide rod two is fixedly installed on the rear side of the push plate, and the limiting slide rod two is slidably connected to the upright plate three.
[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0014] 1. This utility model provides a device for detecting ventilation slots in motor cores. Through the cooperation between the rotating ring and the ventilation slot plate positioning mechanism, multiple ventilation slot plates with ventilation slots in the core can be positioned and detected one by one, thereby improving the continuity and efficiency of detection.
[0015] 2. This utility model provides a device for detecting ventilation slots in motor cores. Through the cooperation of a ring-shaped ultraviolet lamp, an industrial camera, a push plate, and a fluorescent coating, the blockages in the ventilation slots can be directly photographed and displayed through the fluorescent coating, thereby improving the detection quality of blockages in the ventilation slots and avoiding omissions. Attached Figure Description
[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 placement mechanism of the structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the ventilation slot plate positioning mechanism of this utility model.
[0019] Figure 4 This is a schematic diagram of the blockage detection mechanism of this utility model.
[0020] Figure 5 This is a schematic diagram of the display mechanism of the present invention.
[0021] In the diagram: 1. Detection base; 11. Servo motor; 12. Drive gear; 2. Placement mechanism; 21. Rotating ring; 22. Driven gear ring; 23. Fixed column; 24. Vertical plate one; 25. Industrial camera one; 3. Ventilation slot positioning mechanism; 31. Base plate; 32. Semi-cylinder; 33. Limiting block; 34. Ventilation slot; 341. Ventilation slot; 35. L-shaped bracket; 36. Threaded rod; 37. Pressure plate; 38. Pressure column; 39. Limiting slide bar one; 4. Blockage detection mechanism; 41. Vertical plate two; 42. Electric push rod; 43. Circular lighting shell; 44. Ring ultraviolet lamp; 45. Industrial camera two; 5. Display mechanism; 51. Vertical plate three; 52. Self-locking cylinder; 53. Push plate; 54. Fluorescent coating; 55. Limiting slide bar two. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] like Figure 1 , Figure 2 As shown, this utility model provides a device for detecting ventilation slots in motor cores, including a detection base 1, a placement mechanism 2 on the top of the detection base 1, four ventilation slot plate positioning mechanisms 3 arranged in a circular array at the eccentric part of the top of the placement mechanism 2, a blockage detection mechanism 4 at the center of the top of the placement mechanism 2, a display mechanism 5 on the rear side of the placement mechanism 2, and a servo motor 11 fixedly installed on the front left of the top of the detection base 1. The servo motor 11 includes an encoder, and a drive gear 12 is fixedly installed on the output shaft of the servo motor 11. The structure 2 includes a rotating ring 21 and a fixed column 23. The fixed column 23 is located in the inner ring of the rotating ring 21. The rotating ring 21 is movably connected to the top of the detection base 1. The fixed column 23 is fixedly connected to the top of the detection base 1. A driven gear ring 22 is fixedly installed on the upper outer wall of the rotating ring 21. The driving gear 12 meshes with the driven gear ring 22. A vertical plate 24 is fixedly installed on the front side of the top of the fixed column 23. An industrial camera 25 is fixedly installed on the front side of the vertical plate 24. The industrial camera 25 is located on the rear side of one of the four ventilation slot plate positioning mechanisms 3.
[0024] By controlling the rotation angle of the output shaft of the servo motor 11 with the help of the encoder, the meshing of the active gear 12 on the output shaft with the driven gear ring 22 on the outer wall of the rotating ring 21 can accurately drive the rotating ring 21 to rotate 90 degrees clockwise. This allows the overall ventilation slot positioning mechanism 3, on which the ventilation slot 34 is fixed on the left, to move to the front of the industrial camera 25 on the front side of the upright plate 24. The industrial camera 25 can then take pictures of the vertical ventilation slot 34, and the data can be used to complete the size detection of the ventilation slot 341 using existing image processing algorithms. After that, the ventilation slot 34 will continue to rotate with the rotating ring 21.
[0025] like Figure 3 As shown, each of the four ventilation slot positioning mechanisms 3 includes a base plate 31. The base plate 31 is fixedly installed on the top of the rotating ring 21. Two semi-cylinders 32 are fixedly installed at the top center of the base plate 31. An L-shaped bracket 35 is fixedly installed on the top of the base plate 31. Limiting blocks 33 are fixedly installed on the outer wall of the two semi-cylinders 32 near the vertical position of the L-shaped bracket 35. A threaded hole is opened at the horizontal position of the L-shaped bracket 35. A threaded rod 36 is installed in the inner ring of the threaded hole. A knob is fixedly installed on the top of the threaded rod 36. A pressure plate 37 is movably installed at the bottom end of the threaded rod 36. Two pressure columns 38 are fixedly installed at the bottom of the pressure plate 37. A limiting slide rod 39 is fixedly installed on the top of the pressure plate 37. The limiting slide rod 39 is slidably connected to the horizontal position of the L-shaped bracket 35. A ventilation slot 34 is provided between the pressure column 38 and the opposite face of the semi-cylinder 32.
[0026] In use, the ventilation slot 34 is placed on the two semi-cylinders 32 on the top of the base plate 31 and pressed against the limiting block 33. Then, the knob at the top of the horizontal position of the L-shaped bracket 35 can be rotated to drive the threaded rod 36 to rotate. The threaded rod 36 rotates through the threaded connection with the threaded hole, causing the pressure plate 37 to descend. During descent, the limiting slide rod 39 and the sliding connection at the horizontal position of the L-shaped bracket 35 can maintain stability. Finally, the top of the ventilation slot 34 is pressed by the two pressure columns 38 to achieve the vertical positioning of the ventilation slot 34. As the rotating ring 21 rotates 90 degrees, the next ventilation slot 34 can be installed, improving the continuity and efficiency of the inspection.
[0027] like Figure 4 , Figure 5As shown, the ventilation slots 34 are arranged in a ring array with several through ventilation slots 341. The blockage detection mechanism 4 includes a second vertical plate 41, which is fixedly installed on the top rear side of the fixed column 23. An electric push rod 42 is fixedly installed on the rear side of the second vertical plate 41. A circular lighting housing 43 is fixedly installed at the output end of the electric push rod 42. A ring-shaped ultraviolet lamp 44 is fixedly installed inside the circular lighting housing 43. An industrial camera 45 is fixedly installed on the inner ring of the ring-shaped ultraviolet lamp 44. The diameter of the circular lighting housing 43 is the same as that of the ventilation slots 34. The diameters are consistent. The display mechanism 5 includes a vertical plate 3 51, which is fixedly installed on the top rear side of the detection base 1. A self-locking cylinder 52 is fixedly installed on the rear side of the vertical plate 3 51. The output end of the self-locking cylinder 52 extends through to the front side of the vertical plate 3 51 and a push plate 53 is fixedly installed thereon. A fluorescent coating 54 is fixedly coated on the front side of the push plate 53. The push plate 53 is located behind the circular lighting shell 43 and the L-shaped bracket 35. A limit slide rod 2 55 is fixedly installed on the rear side of the push plate 53. The limit slide rod 2 55 is slidably connected to the vertical plate 3 51.
[0028] When the positioned ventilation slot 34 rotates to the rear of the blockage detection mechanism 4, the electric push rod 42 on the rear of the second vertical plate 41 can be activated to control the circular lighting shell 43 to move backward until it fits against the ventilation slot 34. The light from the ring ultraviolet lamp 44 inside the circular lighting shell 43 can then pass through the ventilation slot 341, while the illumination angle of the second industrial camera 45 is unaffected by the hollow design of the ventilation slot 34. Then, by activating the self-locking cylinder 52 on the rear of the third vertical plate 51, the push plate 53 can be controlled to move forward stably with the sliding of the second limit slide rod 55 and the third vertical plate 51 until it abuts against the L-shaped bracket 35. On the rear side, the fluorescent coating 54 is brought as close as possible to the ventilation slot 34. The light from the ring ultraviolet lamp 44 passing through the ventilation slot 341 will cause the fluorescent coating 54 to change color. However, if there is a blockage in the ventilation slot 341, the fluorescent coating 54 will not change color due to the obstruction. Finally, when the push plate 53 moves backward, the industrial camera 45 can quickly take pictures of the color-changing pattern on the fluorescent coating 54 for detection. The fluorescent coating 54 is made of fluorescent material and can return to its original state after the light exposure ends, so as not to affect the detection results when the next ventilation slot 34 rotates to the front of the fluorescent coating 54.
[0029] The working principle of the motor core ventilation slot detection device will be explained in detail below.
[0030] like Figure 1-5As shown, in use, the ventilation slot plate 34 is placed on the two semi-cylinders 32 on the top of the base plate 31 and abutted against the limiting block 33. Then, the knob at the top of the horizontal position of the L-shaped bracket 35 can be rotated to drive the threaded rod 36 to rotate. The threaded rod 36 rotates through the threaded connection with the threaded hole, causing the pressure plate 37 to descend. During descent, the limiting slide rod 39 and the sliding connection at the horizontal position of the L-shaped bracket 35 can maintain stability. Finally, the top of the ventilation slot plate 34 is pressed by the two pressure columns 38 to achieve the vertical positioning of the ventilation slot plate 34. Then, the servo is controlled by the encoder. The rotation angle of the output shaft of the service motor 11 is precisely driven by the meshing of the driving gear 12 on its output shaft with the driven gear ring 22 on the outer wall of the rotating ring 21, thus driving the rotating ring 21 to rotate 90 degrees clockwise. This moves the overall ventilation slot positioning mechanism 3, on which the ventilation slot 34 is fixed on the left, to the front of the industrial camera 25 on the front side of the vertical plate 24. The industrial camera 25 can then take pictures of the vertical ventilation slot 34, and the data can be used to complete the size detection of the ventilation slot 341 using existing image processing algorithms. Afterward, the entire ventilation slot 34 will continue to rotate with the rotating ring 21. When the circular lighting housing 43 reaches the rear of the blockage detection mechanism 4, the electric push rod 42 on the rear of the second vertical plate 41 can be activated to control the circular lighting housing 43 to move backward until it fits against the ventilation slot 34. The light from the ring ultraviolet lamp 44 inside the circular lighting housing 43 can then pass through the ventilation slot 341, while the illumination angle of the second industrial camera 45 is unaffected by the hollow design of the ventilation slot 34. Then, by activating the self-locking cylinder 52 on the rear of the third vertical plate 51, the push plate 53 can be controlled to move forward stably with the sliding of the limit slide rod 2 55 and the third vertical plate 51 until it abuts against the rear of the L-shaped bracket 35, allowing... The fluorescent coating 54 is brought as close as possible to the ventilation slot 34. When the ring-shaped ultraviolet lamp 44 passes through the ventilation slot 341, the fluorescent coating 54 will change color. However, if there is a blockage in the ventilation slot 341, the fluorescent coating 54 will not change color due to the obstruction. Finally, when the push plate 53 moves backward, the industrial camera 45 can quickly take pictures of the color-changing pattern on the fluorescent coating 54 for detection. The fluorescent coating 54 is made of fluorescent material and can return to its original state after the light exposure ends, so as not to affect the detection results when the next ventilation slot 34 rotates to the front of the fluorescent coating 54.
[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A device for detecting ventilation slots in motor cores, comprising a detection base (1), characterized in that: The top of the detection base (1) is provided with a placement mechanism (2). Four ventilation slot positioning mechanisms (3) are arranged in a circular array at the eccentric part of the top of the placement mechanism (2). A blockage detection mechanism (4) is provided at the center of the top of the placement mechanism (2). A display mechanism (5) is provided on the rear side of the placement mechanism (2). A servo motor (11) is fixedly installed on the front left side of the top of the detection base (1). The servo motor (11) includes an encoder. A drive gear (12) is fixedly installed on the output shaft of the servo motor (11). The placement mechanism (2) includes a rotating ring (21) and a fixed column (23). The fixed column (23) is located on the inner ring of the rotating ring (21). The rotating ring (21) is movably connected to the top of the detection base (1). The fixed column (23) is fixedly connected to the top of the detection base (1). A driven gear ring (22) is fixedly installed on the upper outer wall of the rotating ring (21). The driving gear (12) meshes with the driven gear ring (22). A vertical plate (24) is fixedly installed on the front side of the top of the fixed column (23). An industrial camera (25) is fixedly installed on the front side of the vertical plate (24). The industrial camera (25) is located on the rear side of one of the four ventilation slot positioning mechanisms (3).
2. The device for detecting ventilation slots in a motor core according to claim 1, characterized in that: Each of the four ventilation slot positioning mechanisms (3) includes a base plate (31). The base plate (31) is fixedly installed on the top of the rotating ring (21). Two semi-cylinders (32) are fixedly installed on the top center of the base plate (31). An L-shaped bracket (35) is fixedly installed on the top of the base plate (31). Limiting blocks (33) are fixedly installed on the outer wall of the two semi-cylinders (32) near the vertical position of the L-shaped bracket (35).
3. The device for detecting ventilation slots in a motor core according to claim 2, characterized in that: The L-shaped bracket (35) has a threaded hole at its horizontal position. A threaded rod (36) is installed on the inner ring of the threaded hole. A knob is fixedly installed on the top of the threaded rod (36). A pressure plate (37) is movably installed on the bottom of the threaded rod (36). Two pressure columns (38) are fixedly installed on the bottom of the pressure plate (37).
4. The device for detecting ventilation slots in a motor core according to claim 3, characterized in that: A limiting slide rod (39) is fixedly installed on the top of the pressure plate (37). The limiting slide rod (39) is slidably connected to the horizontal position of the L-shaped bracket (35). A ventilation slot (34) is provided between the opposite surfaces of the pressure column (38) and the semi-cylinder (32). The ventilation slot (34) is arranged in a ring array with several ventilation slots (341) that are open from front to back.
5. The device for detecting ventilation slots in a motor core according to claim 1, characterized in that: The blockage detection mechanism (4) includes a second vertical plate (41), which is fixedly installed on the top rear side of the fixed column (23). An electric push rod (42) is fixedly installed on the rear side of the second vertical plate (41). A circular lighting shell (43) is fixedly installed at the output end of the electric push rod (42). An annular ultraviolet lamp (44) is fixedly installed in the inner cavity of the circular lighting shell (43). An industrial camera (45) is fixedly installed in the inner ring of the annular ultraviolet lamp (44). The diameter of the circular lighting shell (43) is the same as the diameter of the ventilation slot (34).
6. The device for detecting ventilation slots in a motor core according to claim 5, characterized in that: The display mechanism (5) includes a three-sided plate (51), which is fixedly installed on the top rear side of the detection base (1). A self-locking cylinder (52) is fixedly installed on the rear side of the three-sided plate (51). The output end of the self-locking cylinder (52) extends through to the front side of the three-sided plate (51) and is fixedly installed with a push plate (53). The front side of the push plate (53) is fixedly coated with a fluorescent coating (54). The push plate (53) is located behind the circular lighting shell (43) and the L-shaped bracket (35).
7. The device for detecting ventilation slots in a motor core according to claim 6, characterized in that: The push plate (53) is fixedly installed with a limiting slide rod two (55) on its rear side, and the limiting slide rod two (55) is slidably connected to the upright plate three (51).