A slot type detection tool and method for a motor stator core

Abstract

The application discloses a slot type detection tool and detection method for a motor stator core, which comprises a positioning slot plate, a slot type detection block and a threaded hole detection plate, a plurality of mounting slot mouths are arranged on the positioning slot plate in a radial distribution mode, the slot type detection block is fixed on the positioning slot plate, and a detection ruler is arranged on the slot type detection block; positioning marks are arranged on the positioning slot plate in a radial distribution mode; guide columns are arranged on the positioning slot plate, the threaded hole detection plate is movably arranged on the guide columns, and a plurality of detection holes are arranged on the threaded hole detection plate. The detection tool can simultaneously detect the slot mouth size and the threaded hole position and size under the same reference, and greatly improves the slot mouth detection efficiency of the stator core; the detection tool is simple and fast to use, can intuitively check the problems of the stator core, and can effectively reduce the problems of the motor, such as the internal temperature rise being too high due to the slot error and the punching position deviation of the core, and the phase angle deviation of the double stator discs.

Description

Technical Field

[0001] This invention relates to the field of motor assembly technology, and in particular to a slot-type inspection tool and method for motor stator cores. Background Technology

[0002] The stator core slots of axial flux disc motors require a high degree of flatness. After the core is punched, it is essential to ensure that the slots are not misaligned and that the slot dimensions meet the requirements. Misalignment in the core is not a complete misalignment, but rather one slot may be intact while another is misaligned. Furthermore, the slot dimensions may still deviate after the back thread holes are drilled. Therefore, the stator core requires slot shape inspection after machining.

[0003] Currently, the detection of misaligned slots and drilling deviations in the iron core mainly relies on visual inspection and measuring tools. Visual inspection requires a high level of experience from employees, has a large margin of error, is inefficient, and cannot guarantee the quality of the stator. Using measuring tools to inspect the slot shape is also inefficient, prone to measurement errors, and offers minimal help in detecting misaligned slots. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a slot type detection fixture and method for motor stator cores. The method is simple and quick to operate, and can intuitively detect problems with the core, reducing issues such as excessive internal temperature rise and phase angle deviation of the double stator disks caused by misalignment of the core slots or hole positions.

[0005] Therefore, the first technical solution of the present invention is: a slot detection fixture for motor stator core, comprising a positioning slot plate, a slot detection block, and a threaded hole detection plate. The positioning slot plate is provided with a plurality of radially distributed mounting slots. The slot detection block is fixed on the positioning slot plate and is provided with a detection ruler. The positioning slot plate is provided with radially distributed positioning marks. The positioning slot plate is mounted with guide posts, and the threaded hole detection plate is movably mounted on the guide posts. The threaded hole detection plate is provided with a plurality of detection holes.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the groove-shaped detection block includes a long strip-shaped main body, the rear end of the long strip-shaped main body is provided with a mounting surface, and the front end of the long strip-shaped main body is a detection ruler.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the groove-shaped detection block is inserted into the mounting slot from the back of the positioning slot plate and fixed by screws; the detection ruler protrudes from the mounting slot.

[0008] Based on the above scheme and as a preferred option, it also includes a threaded hole locating pin, which works in conjunction with the detection hole on the threaded hole detection plate.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the positioning mark on the positioning slot plate is a positioning groove.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the positioning slot plate is provided with multiple sets of mounting slots, and the multiple mounting slots in the same set are of the same size and are distributed in the same annular area.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: the positioning slot plate is provided with multiple sets of mounting slots, each set having at least 5 radially distributed mounting slots, and the mounting slots are evenly distributed; the threaded hole detection plate is provided with multiple sets of detection holes, and the detection holes in the same set have the same diameter.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: two guide posts are provided on each side of the positioning groove plate, and the threaded hole detection plate is movably mounted on the guide posts and can move along the guide posts; the threaded hole detection plate is provided with a handle.

[0013] The second technical solution of the present invention is: a method for detecting the slot shape of a motor stator core, using the aforementioned detection fixture, comprising the following steps:

[0014] 1) Place the stamped stator core into the front of the positioning slot plate. The measuring ruler of the slot detection block works with the slot of the stator core. If the slot of the stator core is successfully inserted, it means that the slot size of the stator core is qualified. If the slot of the stator core cannot pass through, a slot detection block of a different size can be replaced, and the deviation value of the slot can be detected by the measuring ruler.

[0015] 2) After the measuring ruler is inserted into the slot of the stator core, the stator core fits against the positioning slot plate. Compare whether all the slots on the stator core are aligned with the positioning marks on the positioning slot plate. If they are aligned, it means that the slots are not offset.

[0016] 3) After drilling the threaded holes in the stator core, repeat the inspection in step 1);

[0017] 4) Insert the threaded hole inspection plate along the guide post and visually check whether the inspection hole is aligned with the threaded hole on the stator core;

[0018] 5) Insert the threaded hole locating pin into the inspection hole of the threaded hole inspection plate and extend it into the threaded hole of the stator core to perform random or full inspection of the threaded hole.

[0019] 6) After the inspection is completed, remove the thread hole inspection plate and transfer the stator core to the qualified area or the rework area.

[0020] Based on the above scheme and as a preferred option: In step 1), the stator core can be rotated multiple times and then placed back into the front of the positioning slot plate. The slot opening of the stator core is then sampled or fully inspected using the measuring ruler of the slot detection block.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The inspection fixture can simultaneously inspect the slot size and thread hole position and size under the same reference, which greatly improves the slot inspection efficiency of the stator core.

[0023] 2. Use the radial positioning grooves on the positioning slot plate to detect whether the slots of the stator core are misaligned, and quickly determine whether there is a problem with misaligned slots in the stator core.

[0024] 3. At least 5 slot-shaped detection blocks are installed on the positioning slot plate, which can simultaneously detect 5 evenly distributed slots, taking into account the detection of most slots. The stator core can also be rotated to detect other slots in sequence.

[0025] 4. Two sets of mounting slots are provided on the positioning slot plate, and two sets of inspection holes are provided on the threaded hole inspection plate, which can inspect two stator cores of different specifications, thus improving the versatility of the inspection tooling.

[0026] 5. The testing fixture is simple and quick to use, and can intuitively inspect the stator core for problems. It can effectively reduce problems such as excessive internal temperature rise of the motor and phase angle deviation of the double stator disk caused by misaligned core slots and hole position deviation. Attached Figure Description

[0027] The following detailed description, in conjunction with the accompanying drawings and embodiments of the present invention, will provide further information.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a top view of the structure of the present invention;

[0030] Figure 3 This is a bottom view of the structure of the present invention;

[0031] Figure 4 , Figure 5 This is a cross-sectional view of the structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the assembly of the stator core and the positioning slot plate of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0034] Figure 8 This is a schematic diagram of the positioning groove plate of the present invention;

[0035] Figure 9 for Figure 8 A magnified view of a portion of the image;

[0036] Figure 10 This is a schematic diagram of the structure of the groove-shaped detection block of the present invention;

[0037] Figure 11 This is a schematic diagram of the stator core structure of the present invention.

[0038] The markings in the figure are as follows: positioning groove plate 1, first mounting groove 11, second mounting groove 12, positioning groove 13, guide post 14, groove-shaped detection block 2, long strip body 21, mounting surface 22, detection ruler 23, threaded hole detection plate 3, handle 31, first detection hole 32, second detection hole 33, screw 4, stator core 5, groove 51, threaded hole 52, threaded hole positioning pin 6. Detailed Implementation

[0039] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0041] See the attached drawings. The slot type detection fixture described in this embodiment includes a positioning slot plate 1, a slot type detection block 2, and a threaded hole detection plate 3. The positioning slot plate 1 has a circular structure and two sets of mounting positions. The first mounting position includes five radially distributed first mounting slots 11, which are evenly distributed within the same annular area, meaning the first mounting slots have the same size and are equidistant from the center. The second mounting position includes five radially distributed second mounting slots 12. Different slot type detection blocks 2 can be installed in the first mounting slots 11 and second mounting slots 12, allowing for the detection of stator core slots of different specifications. Both the first and second mounting slots are elongated structures, and each set is used independently, with one set in use and the other idle.

[0042] Taking the first mounting slot as an example, the first mounting slot is located on the back of the positioning slot plate, and has a through, elongated opening. A slot-shaped detection block 2 is fixedly installed on each first mounting slot 11. The slot-shaped detection block 2 includes a long strip-shaped body 21, with a mounting surface 22 at the rear end and a detection ruler 23 at the front end. The slot-shaped detection block 2 is inserted into the first mounting slot 11 from the back of the positioning slot plate 1 and fixed by screws 4. The detection ruler 23 protrudes from the elongated opening of the first mounting slot 11, extending beyond the first mounting slot.

[0043] The positioning slot plate 1 has radially distributed positioning marks on its front side. These positioning marks can be marking lines or positioning grooves 13, etc. Taking the positioning grooves as an example, the distribution of the positioning grooves 13 corresponds to the distribution of the slots 51 on the stator core 5. When the stator core 5 is placed on the positioning slot plate 1, the positioning grooves 13 can be used to determine whether the stator core 5 is misaligned.

[0044] The positioning slot plate 1 has guide posts 14 installed at both ends of its front side. The threaded hole detection plate 3 has through holes on both sides, which can be inserted into the guide posts 14. The threaded hole detection plate 3 also has a handle 31 for easy gripping. The threaded hole detection plate 3 has several detection holes. Since the positioning slot plate has two sets of mounting slots for detecting two specifications of stator cores, the detection holes on the threaded hole detection plate are also divided into two sets: a first detection hole 32 and a second detection hole 33. One set of the first detection hole 32 and the second detection hole 33 are idle, and the other set is used. The threaded hole detection plate is placed on the upper surface of the stator core, with the detection holes aligned with the threaded holes of the stator core. The threaded hole positioning pin 6 is inserted into the first detection hole 32. The insertion position of the threaded hole positioning pin 6 determines whether the threaded hole 52 of the stator core 5 is qualified.

[0045] The following steps are included when inspecting the slots of the stator core:

[0046] 1) Place the stamped stator core 5 into the front of the positioning slot plate 1. The measuring ruler 23 of the slot detection block 2 works in conjunction with the slot 51 of the stator core 5. If the slot of the stator core 5 is successfully inserted, it means that the slot size of the stator core 5 is qualified. If the slot of the stator core 5 cannot pass through, a slot detection block 2 of a different size can be replaced, and the deviation value of the slot can be detected by the measuring ruler 23. The stator core can be rotated multiple times and then placed back into the front of the positioning slot plate. The slot of the stator core can be sampled or fully inspected by the measuring ruler of the slot detection block.

[0047] 2) After the slot of the stator core 5 is inserted into the measuring ruler 23, the stator core 5 is in contact with the positioning slot plate 1. Compare whether all the slots 51 on the stator core 5 are aligned with the positioning grooves 13 on the positioning slot plate 1. If they are aligned, it means that the slots are not offset.

[0048] 3) After the stator core 5 is judged to have no wrong slots and the slot size is qualified, the drilling operation is carried out. After the threaded hole 52 is drilled in the stator core 5, the slot size may be deviated. Therefore, it is necessary to repeat the inspection in step 1) and re-inspect the slot size.

[0049] 4) At the same time, insert the threaded hole detection plate 3 along the guide post 14, and visually ensure that the first detection hole 32 is aligned with the threaded hole 52 on the stator core 5.

[0050] 5) Insert the threaded hole positioning pin 6 into any of the first inspection holes 32 of the threaded hole inspection plate 3. If the position and size of the threaded hole 52 of the stator core 5 are qualified, the threaded hole positioning pin 6 can continue to be inserted to the bottom. If the threaded hole positioning pin 6 cannot be inserted, it means that the threaded hole of the stator core 5 is unqualified. The threaded hole can be sampled or fully inspected.

[0051] 6) After the inspection is completed, remove the threaded hole inspection plate 3 and transfer the stator core 5 to the qualified area or the rework area.

[0052] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A slot type detection tooling for a stator core of an axial flux disc machine, characterized by: The utility model relates to a kind of stator core positioning device, including positioning groove plate, slot detection block and threaded hole detection plate, the positioning groove plate is equipped with multiple installation slot that is radially distributed, slot detection block is fixed on positioning groove plate, and detection ruler is equipped on slot detection block;Positioning groove plate is equipped with radially distributed positioning mark;Positioning groove plate is installed with guide column, threaded hole detection plate is movably installed on guide column, and threaded hole detection plate is equipped with several detection holes; The slot detection block includes a long strip-shaped main body, a mounting surface is provided at the rear end of the long strip-shaped main body, and the front end of the long strip-shaped main body is a detection ruler. It further includes a threaded hole positioning pin that cooperates with the detection holes on the threaded hole detection plate. The positioning mark on the positioning groove plate is a positioning groove.

2. A slot detection tooling for a stator core of an axial flux disc machine as claimed in claim 1, characterized in that: Each group has at least five radially distributed installation slots, and the installation slots are evenly distributed.

3. A slot detection tooling for a stator core of an axial flux disc machine as claimed in claim 1, characterized in that: The slot detection block is inserted into the installation slot from the back of the positioning groove plate and is fixed by screws.

4. A slot type detection method for a stator core of an electric machine, using the detection tool according to any one of claims 1 to 3, characterized in that: The threaded hole detection plate is movably installed on the guide column and can move along the guide column. The threaded hole detection plate is provided with a handle. The steps include: 1) After punching and rolling, the axial magnetic flux disc type motor stator core is placed on the front surface of the positioning groove plate, the detection ruler of the slot detection block cooperates with the slot of the stator core, if the slot of the stator core is successfully clamped in, it indicates that the size of the slot of the stator core is qualified, if the slot of the stator core cannot pass, replace the slot detection block with different size, and use the detection ruler to detect the deviation value of the slot; 2) After the slot of the stator core is clamped into the detection ruler, the stator core is attached to the positioning groove plate, and whether all the slots on the stator core are aligned with the positioning marks on the positioning groove plate is compared, if aligned, it indicates that the slot is not offset; 3) After the threaded hole of the stator core is punched, repeat the detection of step 1); 4) Put the threaded hole detection plate along the guide column, and visually detect whether the detection hole is aligned with the threaded hole on the stator core; 5. A slot pattern detection method for a stator core of an electric machine according to claim 4, characterized in that: 5) Insert the threaded hole positioning pin into the detection hole of the threaded hole detection plate, and extend into the threaded hole of the stator core, and perform sampling inspection or full inspection on the threaded hole; 6) After detection, remove the threaded hole detection plate, and transfer the stator core to the qualified area or repair area. In step 1), the stator core can be rotated multiple times, then re-placed on the front surface of the positioning groove plate, and the detection ruler of the slot detection block is used to perform sampling inspection or full inspection on the slot of the stator core.

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