A magnetic steel press-fitting auxiliary tool and a press-fitting method for driving a rotor assembly of a motor

Abstract

The application belongs to the technical field of driving motors, and particularly relates to a magnetic steel press-fitting auxiliary tool and a press-fitting method for a rotor assembly of a driving motor. The magnetic steel press-fitting auxiliary tool comprises a press-fitting jig. The press-fitting jig comprises a guide disc and a lower press disc coaxially arranged on the upper side of the guide disc. A plurality of guide holes matched with a magnetic steel group are arranged on the guide disc, and the positions of the guide holes correspond to the positions of a magnetic steel groove group on the core section of the rotor core of the rotor assembly. A first circular table part is coaxially arranged on the lower side of the guide disc, the lower side of the guide disc is used for abutting against the end surface of the core section, and the first circular table part is used for being inserted into the center hole of the core section. A first guide groove is arranged on the outer circumferential surface of the first circular table part in the up-down direction, and the first guide groove is used for being matched with a first guide key in the center hole of the core section. The upper side of the lower press disc is used for being contacted with a lower press head of a lower press mechanism, and a press-in part is arranged on the lower side of the lower press disc, and the press-in part is used for pressing the magnetic steel group inserted into the guide hole group into the magnetic steel groove group.

Description

Technical Field

[0001] This invention belongs to the field of drive motor technology, specifically relating to an auxiliary tooling and press-fitting method for pressing magnets into the rotor assembly of a drive motor. Background Technology

[0002] The ever-increasing speed, torque density, and power density of drive motors in new energy vehicles place higher demands on the installation of magnets in these motors. The pressing process for magnets onto the rotor core has undergone a significant evolution from manual operation to automated precision assembly, and then to intelligent flexible production. Due to the strong magnetism, fragility, and high precision requirements of magnets, existing magnet pressing processes, such as pressing all magnets onto each section of the rotor core at once, are prone to damage during pressing due to difficulties in positioning and low positioning accuracy. While pressing magnets one by one or in groups (e.g., grouping multiple magnets within the same sector on a core section) simplifies positioning, improves positioning accuracy, and reduces magnet damage during pressing, it still suffers from low pressing efficiency and difficulty in ensuring the consistency of each magnet's assembly, leading to reduced assembly precision. This also means that existing magnet pressing processes often suffer from the technical problem of not being able to balance the simplicity and accuracy of pressing and positioning with pressing efficiency and magnet assembly precision. Summary of the Invention

[0003] To address the shortcomings of the prior art, this invention provides an auxiliary tooling and pressing method for pressing magnets into the rotor assembly of a drive motor. This solves the technical problem that existing magnet pressing processes often struggle to balance the simplicity and accuracy of pressing positioning with pressing efficiency and magnet assembly precision.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A magnet pressing auxiliary tooling for a rotor assembly of a drive motor includes a pressing fixture; the pressing fixture includes a guide plate and a lower pressing plate coaxially disposed on the upper side of the guide plate; The guide plate is provided with a set of guide holes that cooperate with the magnet assembly. The position of the set of guide holes corresponds to the position of the magnet slot assembly on the core section of the rotor core of the rotor assembly. A first frustum is coaxially arranged on the lower side of the guide disk. The lower side of the guide disk is used to fit against the end face of the iron core segment. The first frustum is used to insert into the center hole of the iron core segment to coaxially position the guide disk and the iron core segment. A first guide groove is formed on the outer circumferential surface of the first frustum along the vertical direction. The first guide groove is used to cooperate with a first guide key in the center hole of the iron core segment to circumferentially position the guide disk and the iron core segment. The upper side of the pressure plate is used to contact the pressure head of the pressure mechanism, and the lower side of the pressure plate is provided with a pressing part, which is used to press the magnet group inserted into the guide hole group into the magnet groove group of the iron core section.

[0005] The auxiliary tooling for pressing magnets in the rotor assembly of the drive motor provided by this invention, by setting up the guide plate and the lower pressure plate, and utilizing the first frustum and the first guide groove, can achieve coaxial and circumferential positioning between the guide plate and the core segment. Then, by inserting each magnet in the magnet group into the corresponding guide hole in the guide hole group on the guide plate one by one, the pressing and positioning of all magnets in the magnet group with the core segment can be completed in one go. Finally, by using the lower pressure mechanism to press down the lower pressure plate, all magnets in the magnet group can be pressed into place in one operation. This results in high assembly consistency and high pressing efficiency. Furthermore, the lower pressure mechanism can press the magnet group inserted into the guide hole group into the core segment by pressing down the lower pressure plate. During the pressing process of the magnet slot assembly of the core segment, the guide hole group is used to limit the magnet assembly, thereby guiding the pressing of the magnet assembly during the pressing process. This ensures that each magnet in the magnet assembly can be accurately pressed into the corresponding magnet slot in the magnet slot group along the downward pressing direction, making it less likely to damage the magnets. Therefore, using the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by this invention to perform the magnet pressing of each core segment of the rotor core has the advantages of quick and accurate pressing positioning, simple positioning operation, high magnet assembly accuracy, and high pressing efficiency. It solves the technical problem that existing magnet pressing processes usually have difficulty in balancing the simplicity and accuracy of pressing positioning with pressing efficiency and magnet assembly accuracy.

[0006] Furthermore, the pressure plate is provided with a first limiting structure and the guide plate is provided with a second limiting structure; the first limiting structure and the second limiting structure are used to cooperate with each other during the process of the pressure plate pressing down to insert the magnet group into the guide hole group, so as to fix the circumferential positioning and coaxial positioning between the pressure plate and the guide plate.

[0007] By setting the first limiting structure and the second limiting structure, the first limiting structure and the second limiting structure cooperate with each other during the process of the lower pressure plate pressing the magnet assembly inserted into the guide hole group, fixing the circumferential positioning and coaxial positioning between the lower pressure plate and the guide plate. This ensures that the lower pressure plate can always press down along the pressing direction during the pressing process, without axial tilting or circumferential rotation. This provides a stable and uniform downward pressure for the magnet assembly inserted into the guide hole group, further improving the pressing accuracy and the assembly consistency of each magnet in the magnet assembly after pressing. It also ensures that the posture of each magnet in the magnet assembly will not tilt due to changes in downward pressure during the pressing process, reducing the risk of scratches, damage and breakage of the magnets during the pressing process.

[0008] The specific structural configurations of the first limiting structure and the second limiting structure can be implemented using various technical solutions, including but not limited to the following three technical solutions: In the first technical solution, the first limiting structure includes a second frustum coaxially disposed on the lower side of the pressure plate, and a second guide key disposed on the outer peripheral surface of the second frustum. The second limiting structure includes a first guide hole coaxially formed on the upper side of the guide disk, and a second guide groove formed on the inner circumferential surface of the first guide hole. The lower end of the first guide hole extends to the lower end face of the first frustum portion. The second guide groove extends along the vertical direction, with the upper end of the second guide groove extending to the upper side of the guide disk and the lower end of the second guide groove extending to the lower end face of the first frustum portion. The second frustum portion is used to insert into the first guide hole, and the outer peripheral surface of the second frustum portion mates with the inner peripheral surface of the first guide hole to coaxially position the pressure plate and the guide plate; the second guide key is used to mate with the second guide groove to circumferentially position the pressure plate and the guide plate.

[0009] In the second technical solution, the first limiting structure includes a first positioning part coaxially disposed on the lower side of the lower pressure plate. The first positioning part is elliptical cylindrical, and the upper end of the first positioning part is fixedly connected to or integrally formed on the lower side of the lower pressure plate. The second limiting structure includes a second guide hole coaxially formed on the upper side of the guide disk, the lower end of the second guide hole extending through to the lower end face of the first frustum portion; The first positioning part is used to insert into the second guide hole, and the inner peripheral surface of the second guide hole cooperates with the outer peripheral surface of the first positioning part to fix the circumferential positioning and coaxial positioning between the pressure plate and the guide plate.

[0010] In the third technical solution, the first limiting structure includes a second positioning part coaxially disposed on the lower side of the lower pressure plate. The second positioning part is in the shape of a polygonal prism, and the upper end of the second positioning part is fixedly connected to or integrally formed on the lower side of the lower pressure plate. The second limiting structure includes a third guide hole coaxially formed on the upper side of the guide disk, the lower end of the third guide hole extending through to the lower end face of the first frustum portion; The second positioning part is used to insert into the third guide hole, and the inner peripheral surface of the third guide hole cooperates with the outer peripheral surface of the second positioning part to fix the circumferential positioning and coaxial positioning between the pressure plate and the guide plate.

[0011] Furthermore, the guide hole group includes a plurality of guide holes formed on the guide disk, each guide hole penetrating the guide disk along the vertical direction; the number of guide holes is the same as the number of magnet slots in the magnet slot group, and they are arranged in a one-to-one correspondence; the guide holes are used to insert magnets in the magnet group for loading the corresponding magnet slots, and the inner circumferential surface of the guide holes cooperates with the outer circumferential surface of the magnets in the magnet group for loading the corresponding magnet slots.

[0012] Furthermore, the pressing part includes multiple pressing blocks, and the upper end of each pressing block is fixedly connected to or integrally formed on the lower side of the lower pressing plate. The number of pressure blocks is the same as the number of guide holes, and they are set in a one-to-one correspondence; the pressure blocks are used to press the magnets inserted into the corresponding guide holes into the corresponding magnet slots.

[0013] Furthermore, the outer peripheral surface of the pressure block mates with the inner peripheral surface of the corresponding guide hole, and the length of each pressure block in the vertical direction is the same, and the length of the pressure block in the vertical direction is not less than the thickness of the guide disc in the vertical direction.

[0014] By aligning the outer circumferential surface of the pressure block with the inner circumferential surface of the corresponding guide hole, and ensuring that the lengths of each pressure block are identical in the vertical direction, the pressure block can be pressed down by the lower pressure plate. After each pressure block enters the corresponding guide hole, the circumferential and coaxial positioning between the lower pressure plate and the guide plate is further fixed, thereby further improving the assembly consistency of each magnet in the magnet assembly after pressing.

[0015] Furthermore, the length of the pressure block in the vertical direction is equal to the thickness of the guide disc in the vertical direction.

[0016] By making the length of the pressure block in the vertical direction equal to the thickness of the guide plate in the vertical direction, when using the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by the present invention to perform magnet pressing of each core segment of the rotor core, it is possible not only to determine whether the magnet group has been pressed into place by whether the lower side of the pressure plate and the upper side of the guide plate are in contact (since when the lower side of the pressure plate and the upper side of the guide plate are in contact, the upper end face of each magnet of the magnet group is flush with the end face of the core segment), but also to ensure that the pressure plate does not overpress the magnet group.

[0017] Based on the auxiliary tooling for pressing magnets into the rotor assembly of the drive motor provided by this invention, this invention also provides a method for pressing magnets into the rotor assembly of the drive motor, the method comprising: Step 1: Place any core segment of the rotor core of the rotor assembly that has not yet been pressed with magnets on the pressing base, with one end face of the core segment facing upwards. Step 2: Insert the first frustum portion on the guide plate of the pressing fixture of the magnet pressing auxiliary tooling of the drive motor rotor assembly provided by the present invention into the center hole of the iron core segment from the upper side of the iron core segment, and insert the first guide key in the center hole into the first guide groove on the first frustum portion until the lower side of the guide plate is in contact with the upper end face of the iron core segment. Step 3: Insert the magnet assembly into the guide hole assembly on the guide plate; Step 4: Place the lower pressure plate of the pressing fixture on the upper side of the guide plate, so that the pressing part on the lower side of the lower pressure plate fits against the upper end of the magnet assembly; and complete the coaxial positioning and circumferential positioning between the lower pressure plate and the guide plate; Step 5: Use the pressing mechanism to press down the pressing plate, so that the pressing part presses the magnet group inserted into the guide hole group into the magnet slot group of the iron core section, thus completing the magnet pressing of the iron core section; Repeat steps 1 to 5 above until the magnets of all core segments of the rotor core are fully press-fitted.

[0018] Based on the auxiliary tooling for pressing magnets into the rotor assembly of the drive motor provided by the present invention, the present invention also provides a preferred embodiment, in which the auxiliary tooling for pressing magnets into the rotor assembly includes a plurality of the pressing fixtures. In the rotor assembly of the skew-pole drive motor, each core segment with a different deflection angle is provided with a corresponding pressing fixture; The position of the guide hole group on the guide plate of the press-fit fixture corresponds to the position of the magnetic groove group on the corresponding iron core segment; the first frustum is used to insert into the center hole of the corresponding iron core segment to coaxially position the guide plate and the corresponding iron core segment; the first guide groove is used to cooperate with the first guide key in the center hole of the corresponding iron core segment to circumferentially position the guide plate and the corresponding iron core segment. The pressing part on the lower pressure plate is used to press the magnet group of the guide hole group on the guide plate of the same pressing fixture into the magnet slot group of the corresponding iron core segment.

[0019] Because each core segment of the rotor core of the skew-pole drive motor rotor assembly has multiple deflection angles, the position of the first guide key in the center hole of each core segment also needs to be deflected according to the deflection angle of the core segment (because after the core segments are finally stacked into the rotor core, the first guide keys need to be connected as a whole to form a connecting key to connect with the connecting groove key on the rotor shaft). This makes it impossible for a single press-fitting fixture to be universally applicable to any two core segments with different deflection angles.

[0020] The above-mentioned preferred solution provides a pressing fixture for each core segment with a different deflection angle in the rotor core of the rotor assembly of the skew-pole drive motor. This makes the magnet pressing auxiliary tooling for the rotor assembly of the drive motor provided by the present invention applicable to the magnet pressing of each core segment of the rotor core of the skew-pole drive motor, thus improving its versatility.

[0021] Based on the above-mentioned preferred embodiment, the present invention also provides an auxiliary tooling for pressing magnets into the rotor assembly of the drive motor. A method for pressing magnets into the rotor assembly of a drive motor, the method comprising: Step A: Place any core segment of the rotor core of the skew-pole drive motor that has not yet been pressed with magnets on the pressing base, with one end face of the core segment facing upwards. Step B: Based on the deflection angle of the core segment, select the pressing fixture corresponding to the core segment from among the pressing fixtures of the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by the above preferred scheme. Step C: Insert the first frustum portion on the guide plate of the selected press-fitting fixture into the center hole of the iron core segment from the upper side of the iron core segment, and insert the first guide key in the center hole into the first guide groove on the first frustum portion until the lower side of the guide plate is in contact with the upper end face of the iron core segment. Step D: Insert the magnet assembly into the guide hole assembly on the guide plate; Step E: Place the lower pressure plate of the selected pressing fixture on the upper side of the guide plate, so that the pressing part on the lower side of the lower pressure plate fits against the upper end of the magnet assembly; and complete the coaxial positioning and circumferential positioning between the lower pressure plate and the guide plate. Step F: Use the pressing mechanism to press down the pressing plate, so that the pressing part presses the magnet group inserted into the guide hole group into the magnet slot group of the iron core section, thus completing the magnet pressing of the iron core section; Repeat steps A through F above until the magnets of all core segments of the rotor core are fully press-fitted.

[0022] The auxiliary tooling and pressing method for pressing magnets into the rotor assembly of the drive motor provided by this invention have at least the following technical effects or advantages: 1. The auxiliary tooling for pressing magnets in the rotor assembly of the drive motor provided by the present invention, by setting the guide plate and the lower pressure plate, and utilizing the first frustum and the first guide groove, can achieve coaxial and circumferential positioning between the guide plate and the core segment. Then, by inserting each magnet in the magnet group into the corresponding guide hole in the guide hole group on the guide plate one by one, the pressing and positioning of all magnets in the magnet group and the core segment can be completed in one go. Then, by using the lower pressure mechanism to press down the lower pressure plate, all magnets in the magnet group can be pressed in one go. The assembly consistency is high, the pressing efficiency is high, and the lower pressure mechanism can also press the magnet group inserted into the guide hole group into the guide hole group. During the pressing process of the magnet slot assembly of the core segment, the guide hole group is used to limit the magnet assembly, thereby guiding the pressing of the magnet assembly during the pressing process. This ensures that each magnet in the magnet assembly can be accurately pressed into the corresponding magnet slot in the magnet slot group along the downward pressing direction, making it less likely to damage the magnets. Therefore, using the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by this invention to perform the magnet pressing of each core segment of the rotor core has the advantages of quick and accurate pressing positioning, simple positioning operation, high magnet assembly accuracy, and high pressing efficiency. It solves the technical problem that existing magnet pressing processes usually have difficulty in balancing the simplicity and accuracy of pressing positioning with pressing efficiency and magnet assembly accuracy.

[0023] 2. By setting the first limiting structure and the second limiting structure, the first limiting structure and the second limiting structure cooperate with each other during the process of the lower pressure plate pressing the magnet assembly inserted into the guide hole group, fixing the circumferential positioning and coaxial positioning between the lower pressure plate and the guide plate. This ensures that the lower pressure plate can always press down along the pressing direction during the pressing process, without axial tilting or circumferential rotation. This provides a stable and uniform downward pressure for the magnet assembly inserted into the guide hole group, further improving the pressing accuracy and the assembly consistency of each magnet in the magnet assembly after pressing. It also ensures that the posture of each magnet in the magnet assembly will not tilt due to changes in downward pressure during the pressing process, reducing the risk of scratches, damage and breakage of the magnets during the pressing process.

[0024] 3. By aligning the outer circumferential surface of the pressure block with the inner circumferential surface of the corresponding guide hole, and ensuring that the lengths of each pressure block are the same in the vertical direction, the pressure block can be pressed down by the lower pressure plate. After each pressure block enters the corresponding guide hole, the circumferential and coaxial positioning between the lower pressure plate and the guide plate is further fixed, thereby further improving the assembly consistency of each magnet in the magnet assembly after pressing.

[0025] 4. By making the length of the pressing block in the vertical direction equal to the thickness of the guide plate in the vertical direction, when using the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by the present invention to perform magnet pressing of each core segment of the rotor core, it is possible not only to determine whether the magnet group has been pressed into place by whether the lower side of the pressing plate and the upper side of the guide plate are in contact (since when the lower side of the pressing plate and the upper side of the guide plate are in contact, the upper end face of each magnet of the magnet group is flush with the end face of the core segment), but also to ensure that the pressing plate does not overpress the magnet group.

[0026] 5. By providing a pressing fixture for each core segment with a different deflection angle in the rotor core of the rotor assembly of the skew-pole drive motor, the magnet pressing auxiliary tooling for the rotor assembly of the drive motor provided by the present invention can also be applied to the magnet pressing of each core segment of the rotor core of the skew-pole drive motor, thus improving versatility.

[0027] 6. By adjusting the shape and position of each guide hole in the guide hole group, it is possible to adapt to the core section of various magnet geometric arrangement forms (such as, but not limited to: straight, V-shaped, double V-shaped, triple V-shaped, etc.), and it can be used for magnet pressing of embedded permanent magnet rotors with various magnet geometric arrangements. Attached Figure Description

[0028] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an exploded structural diagram of the press-fit fixture, magnet assembly, and core section in the embodiment; Figure 2 This is a schematic diagram of the assembled three-dimensional structure of the press-fitting fixture, magnet assembly, and iron core section in the embodiment; Figure 3 This is a bottom view of the assembly structure of the press-fitting fixture, the magnet assembly, and the iron core section when the magnet assembly is fully pressed into the magnet slot assembly in the embodiment. Figure 4 yes Figure 3 AA cross-section view; Figure 5 This is a schematic diagram of the three-dimensional assembly structure of the guide plate and the iron core section in the embodiment; Figure 6 This is a schematic diagram of the three-dimensional assembly structure of the guide plate, iron core section and magnet assembly in the embodiment; Figure 7 This is a schematic diagram of the cooperative structure of the guide plate and the pressure plate in the embodiment; Among them, 1-guide plate, 2-lower pressure plate, 3-iron core section, 4-first truncated cone section, 5-guide groove, 6-pressing section, 7-magnetic steel group; 1.1 - First guide hole, 1.2 - Outer guide hole, 1.3 - Middle guide hole, 1.4 - Inner guide hole; 2.1 - Second frustum portion; 2.2 - Second guide key; 2.1.1 - Guide cone surface; 3.1 - First guide key; 3.2 - Magnet slot assembly; 3.2.1 - Outer V-shaped magnetic steel channel; 3.2.2 - Middle V-shaped magnetic steel channel; 3.2.3 - Inner V-shaped magnetic steel channel; 6.1 Outer layer pressing block, 6.2 Middle layer pressing block, 6.3 Inner layer pressing block; 7.1 Outer V-shaped magnet, 7.2 Middle V-shaped magnet, 7.3 Inner V-shaped magnet. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Example 1: like Figures 1 to 7 As shown, this embodiment 1 provides an auxiliary tooling for pressing magnets into the rotor assembly of a drive motor, including a pressing fixture; the pressing fixture includes a guide plate 1 and a lower pressing plate 2 coaxially disposed on the upper side of the guide plate 1; The guide plate 1 is provided with a set of guide holes that cooperate with the magnet assembly 7. The position of the guide hole set corresponds to the position of the magnet slot set 3.2 on the core section 3 of the rotor core of the rotor assembly. A first frustum 4 is coaxially provided on the lower side of the guide disk 1. The lower side of the guide disk 1 is used to fit against the end face of the iron core segment 3. The first frustum 4 is used to insert into the center hole of the iron core segment 3 to coaxially position the guide disk 1 and the iron core segment 3. A first guide groove is provided on the outer circumferential surface of the first frustum 4 along the vertical direction. The first guide groove is used to cooperate with the first guide key 3.1 in the center hole of the iron core segment 3 to circumferentially position the guide disk 1 and the iron core segment 3. The upper side of the pressure plate 2 is used to contact the pressure head of the pressure mechanism. The lower side of the pressure plate 2 is provided with a pressing part 6, which is used to press the magnet group 7 inserted into the guide hole group into the magnet groove group 3.2 of the iron core section 3.

[0032] The auxiliary tooling for pressing magnets in the rotor assembly of the drive motor provided by this invention, by setting up a guide plate 1 and a lower pressure plate 2, and utilizing the first frustum 4 and the first guide groove, can achieve coaxial and circumferential positioning between the guide plate 1 and the core segment 3. Then, each magnet in the magnet group 7 is inserted one by one into the corresponding guide hole in the guide hole group on the guide plate 1, so that the pressing and positioning between all the magnets in the magnet group 7 and the core segment 3 can be completed in one go. Then, by using the lower pressure mechanism to press down the lower pressure plate 2, all the magnets in the magnet group 7 can be pressed in one go. The assembly consistency is high, the pressing efficiency is high, and the lower pressure mechanism can also press the magnet group 7 inserted into the guide hole group into the magnet groove group 3 of the core segment 3. During process 2, the guide hole group is used to limit the magnet group 7, and the magnet group 7 is guided during the pressing process. This ensures that each magnet in the magnet group 7 can be accurately pressed into the corresponding magnet groove in the magnet groove group 3.2 along the downward pressing direction, which is not easy to damage the magnet. This makes the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by this invention to perform the magnet pressing of each core segment 3 of the rotor core have the advantages of quick and accurate pressing positioning, simple positioning operation, high magnet assembly accuracy and high pressing efficiency. It solves the technical problem that existing magnet pressing processes usually have difficulty in balancing the simplicity and accuracy of pressing positioning with pressing efficiency and magnet assembly accuracy.

[0033] Preferably, in this embodiment 1, the lower pressure plate 2 is provided with a first limiting structure and the guide plate 1 is provided with a second limiting structure; the first limiting structure and the second limiting structure are used to cooperate with each other during the process of the lower pressure plate 2 pressing down to insert the magnet group 7 of the guide hole group, so as to fix the circumferential positioning and coaxial positioning between the lower pressure plate 2 and the guide plate 1.

[0034] By setting a first limiting structure and a second limiting structure, the first limiting structure and the second limiting structure cooperate with each other during the process of pressing the magnet assembly 7 inserted into the guide hole group by the lower pressure plate 2, fixing the circumferential positioning and coaxial positioning between the lower pressure plate 2 and the guide plate 1. This ensures that the lower pressure plate 2 can always press down along the pressing direction during the pressing process, without axial tilting or circumferential rotation. This provides a stable and uniform downward pressure for the magnet assembly 7 inserted into the guide hole group, further improving the pressing accuracy and the assembly consistency of each magnet in the magnet assembly 7 after pressing. It also ensures that the posture of each magnet in the magnet assembly 7 will not tilt due to changes in downward pressure during the pressing process, reducing the risk of scratches, damage and breakage of the magnets during the pressing process.

[0035] In this embodiment 1, the specific structural configuration of the first limiting structure and the second limiting structure can be implemented using various technical solutions, including but not limited to the following three technical solutions: In the first technical solution, such as Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the first limiting structure includes a second frustum 2.1 coaxially disposed on the lower side of the lower pressure plate 2, and a second guide key 2.2 disposed on the outer peripheral surface of the second frustum 2.1; The second limiting structure includes a first guide hole 1.1 coaxially formed on the upper side of the guide disk 1, and a second guide groove formed on the inner circumferential surface of the first guide hole 1.1. The lower end of the first guide hole 1.1 extends to the lower end face of the first frustum portion 4. The second guide groove extends in the vertical direction, with the upper end of the second guide groove extending to the upper side of the guide disk 1 and the lower end of the second guide groove extending to the lower end face of the first frustum portion 4. The second frustum portion 2.1 is used to insert into the first guide hole 1.1 to coaxially position the pressure plate 2 and the guide plate 1; the outer peripheral surface of the second frustum portion 2.1 mates with the inner peripheral surface of the first guide hole 1.1, and the second guide key 2.2 is used to mate with the second guide groove to circumferentially position the pressure plate 2 and the guide plate 1.

[0036] In the second technical solution, the first limiting structure includes a first positioning part coaxially disposed on the lower side of the lower pressure plate 2. The first positioning part is elliptical cylindrical, and the upper end of the first positioning part is fixedly connected to or integrally formed on the lower side of the lower pressure plate 2. The second limiting structure includes a second guide hole coaxially opened on the upper side of the guide disk 1, and the lower end of the second guide hole extends through to the lower end face of the first frustum portion 4. The first positioning part is used to insert into the second guide hole. The inner circumferential surface of the second guide hole cooperates with the outer circumferential surface of the first positioning part to fix the circumferential positioning and coaxial positioning between the pressure plate 2 and the guide plate 1.

[0037] In the third technical solution, the first limiting structure includes a second positioning part coaxially disposed on the lower side of the lower pressure plate 2. The second positioning part is in the shape of a polygonal prism, and the upper end of the second positioning part is fixedly connected to or integrally formed on the lower side of the lower pressure plate 2. The second limiting structure includes a third guide hole coaxially opened on the upper side of the guide disk 1, and the lower end of the third guide hole extends through to the lower end face of the first frustum portion 4. The second positioning part is used to insert into the third guide hole. The inner circumferential surface of the third guide hole mates with the outer circumferential surface of the second positioning part to fix the circumferential positioning and coaxial positioning between the pressure plate 2 and the guide plate 1.

[0038] Specifically, in this embodiment 1, the specific structural settings of the first limiting structure and the second limiting structure adopt the first technical solution described above.

[0039] Preferably, in this embodiment 1, a guide cone surface 2.1.1 is provided on the outer periphery of the lower end of the second frustum portion 2.1.

[0040] By setting the guide cone surface 2.1.1, the second frustum 2.1 can be inserted into the first guide hole 1.1 more easily, and the coaxial positioning between the pressure plate 2 and the guide plate 1 can be quickly achieved.

[0041] Specifically, in this embodiment 1, as follows Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the first guide groove and the second guide groove are connected to form the guide groove 5; correspondingly, the first minimum straight-line distance between the outer side of the second guide key 2.2 and the central axis of the lower pressure plate 2 is less than the second minimum straight-line distance between the inner side of the first guide key 3.1 and the central axis of the iron core section 3.

[0042] Preferably, in this embodiment 1, the guide hole group includes multiple guide holes formed on the guide disk 1, each guide hole penetrating the guide disk 1 in the vertical direction; the number of guide holes is the same as the number of magnet slots in the magnet slot group 3.2, and they are set in a one-to-one correspondence; the guide holes are used to insert magnets in the magnet group 7 for loading into the corresponding magnet slots, and the inner circumferential surface of the guide holes cooperates with the outer circumferential surface of the magnets in the magnet group 7 for loading into the corresponding magnet slots.

[0043] Specifically, in this embodiment 1, the pressing part 6 includes multiple pressing blocks, and the upper end of each pressing block is fixedly connected to or integrally formed on the lower side of the lower pressing plate 2; The number of pressure blocks and guide holes are the same, and they are set one-to-one; the pressure blocks are used to press the magnets inserted into the corresponding guide holes into the corresponding magnet slots.

[0044] Specifically, in this embodiment 1, the outer peripheral surface of the pressure block matches the inner peripheral surface of the corresponding guide hole, and the length of each pressure block in the vertical direction is the same, and the length of the pressure block in the vertical direction is not less than the thickness of the guide plate 1 in the vertical direction.

[0045] By aligning the outer circumferential surface of the pressure block with the inner circumferential surface of the corresponding guide hole, and ensuring that the lengths of each pressure block are the same in the vertical direction, the circumferential and coaxial positioning between the lower pressure plate 2 and the guide plate 1 can be further fixed after the pressure plate 2 is pressed down and each pressure block enters the corresponding guide hole; this further improves the assembly consistency of each magnet in the magnet assembly 7 after pressing.

[0046] Specifically, in this embodiment 1, the length of the pressure block in the vertical direction is equal to the thickness of the guide plate 1 in the vertical direction.

[0047] By making the length of the pressure block in the vertical direction equal to the thickness of the guide plate 1 in the vertical direction, when using the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by the present invention to perform magnet pressing of each core segment 3 of the rotor core, it is possible not only to determine whether the magnet group 7 has been pressed into place by whether the lower side of the pressure plate 2 is in contact with the upper side of the guide plate 1 (since when the lower side of the pressure plate 2 is in contact with the upper side of the guide plate 1, the upper end face of each magnet of the magnet group 7 is flush with the end face of the core segment 3), but also to ensure that the pressure plate 2 does not overpress the magnet group 7.

[0048] By adjusting the shape and position of each guide hole in the guide hole group, the core section 3 with various magnetic steel geometric arrangements can be adapted (such as, but not limited to, straight, V-shaped, double V-shaped, triple V-shaped, etc.), which can be used for the pressing of embedded permanent magnet rotors with various magnetic steel geometric arrangements.

[0049] Specifically, in this embodiment 1, the core segment 3, which adopts a three-V-shaped magnet geometric arrangement, is taken as an example, such as... Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the guide hole group includes multiple outer guide holes 1.2, multiple middle guide holes 1.3 and multiple inner guide holes 1.4 formed on the guide disk 1. The outer guide holes 1.2, middle guide holes 1.3 and inner guide holes 1.4 all penetrate the guide disk 1 in the vertical direction; The number of outer guide holes 1.2 and the number of outer V-shaped magnetic grooves 3.2.1 of magnetic groove group 3.2 are the same, and they are set in a one-to-one correspondence; The number of middle layer guide holes 1.3 and the number of middle layer V-shaped magnetic grooves 3.2.2 in magnetic groove group 3.2 are the same, and they are set in a one-to-one correspondence; The number of inner guide holes 1.4 is the same as that of inner V-shaped magnetic grooves 3.2.3 in magnetic groove group 3.2, and they are set in a one-to-one correspondence; The outer guide hole 1.2 is used to insert the outer V-shaped magnet 7.1 into the magnet assembly 7 for loading the corresponding outer V-shaped magnet groove 3.2.1; The middle layer guide hole 1.3 is used to insert the middle layer V-shaped magnet 7.2 in the magnet assembly 7 for loading the corresponding middle layer V-shaped magnet groove 3.2.2; The inner guide hole 1.4 is used to insert the inner V-shaped magnet 7.3 into the magnet assembly 7 for loading the corresponding inner V-shaped magnet groove 3.2.3; The inner circumferential surface of the outer guide hole 1.2 mates with the outer circumferential surface of the outer V-shaped magnet 7.1 in the magnet assembly 7, which is used to insert the corresponding outer V-shaped magnet groove 3.2.1; The inner circumferential surface of the middle layer guide hole 1.3 mates with the outer circumferential surface of the middle layer V-shaped magnet 7.2 in the magnet assembly 7, which is used to insert the corresponding middle layer V-shaped magnet groove 3.2.2; The inner peripheral surface of the inner guide hole 1.4 mates with the outer peripheral surface of the inner V-shaped magnet 7.3 in the magnet assembly 7, which is used to insert the corresponding inner V-shaped magnet groove 3.2.3; The pressing section 6 includes multiple outer pressing blocks 6.1, multiple middle pressing blocks 6.2, and multiple inner pressing blocks 6.3; The upper ends of the outer layer pressing block 6.1, the middle layer pressing block 6.2 and the inner layer pressing block 6.3 are all fixedly connected or integrally formed on the lower side of the lower pressing plate 2; The number of outer layer pressure blocks 6.1 and outer layer guide holes 1.2 are the same, and they are set in a one-to-one correspondence; The number of middle layer pressure blocks 6.2 and the number of middle layer guide holes 1.3 are the same, and they are set in a one-to-one correspondence; The number of inner layer pressure blocks 6.3 and inner layer guide holes 1.4 are the same, and they are set in a one-to-one correspondence; The outer layer pressing block 6.1 is used to press the outer layer V-shaped magnet 7.1, which is inserted into the corresponding outer layer guide hole 1.2, into the corresponding outer layer V-shaped magnet groove 3.2.1; The middle layer pressing block 6.2 is used to press the middle layer V-shaped magnet 7.2, which is inserted into the corresponding middle layer guide hole 1.3, into the corresponding middle layer V-shaped magnet groove 3.2.2; The inner layer pressing block 6.3 is used to press the inner layer V-shaped magnet 7.3, which is inserted into the corresponding inner layer guide hole 1.4, into the corresponding inner layer V-shaped magnet groove 3.2.3; The outer peripheral surface of the outer layer pressure block 6.1 mates with the inner peripheral surface of the corresponding outer layer guide hole 1.2; The outer peripheral surface of the middle layer pressure block 6.2 mates with the inner peripheral surface of the corresponding middle layer guide hole 1.3; The outer peripheral surface of the inner layer pressure block 6.3 mates with the inner peripheral surface of the corresponding inner layer guide hole 1.4; The lengths of each outer layer pressing block 6.1 in the vertical direction, the lengths of each middle layer pressing block 6.2 in the vertical direction, and the lengths of each inner layer pressing block 6.3 in the vertical direction are all equal to the thickness of the guide plate 1 in the vertical direction.

[0050] Example 2: Based on the auxiliary tooling for pressing magnets into the rotor assembly of the drive motor provided in Example 1, Example 2 provides a method for pressing magnets into the rotor assembly of the drive motor. The method includes: Step 1: Place any core segment 3 of the rotor core of the rotor assembly that has not yet been pressed with magnets on the pressing base, and make one end face of the core segment 3 face upward. Step 2: Insert the first frustum 4 on the guide plate 1 of the press-fitting fixture of the magnet press-fitting auxiliary tooling of the drive motor rotor assembly provided in Example 1 into the center hole of the iron core section 3 from the upper side of the iron core section 3, and insert the first guide key 3.1 in the center hole into the first guide groove (i.e., guide groove 5) on the first frustum 4 until the lower side of the guide plate 1 is in contact with the upper end face of the iron core section 3; Step 3: Insert the magnet assembly 7 into the guide hole assembly on the guide plate 1; Step 4: Place the lower pressure plate 2 of the pressing fixture on the upper side of the guide plate 1, so that the pressing part 6 on the lower side of the lower pressure plate 2 fits against the upper end of the magnet assembly 7; and complete the coaxial positioning and circumferential positioning between the lower pressure plate 2 and the guide plate 1. Step 5: Use the pressing mechanism to press down the pressing plate 2, so that the pressing part 6 presses the magnet group 7 inserted into the guide hole group into the magnet groove group 3.2 of the iron core section 3, thus completing the magnet pressing of the iron core section 3; Repeat steps 1 to 5 above until all the magnets of all core segments 3 of the rotor core are pressed into place.

[0051] The methods for achieving coaxial and circumferential positioning between the pressure plate 2 and the guide plate 1 include: Insert the second frustum 2.1 on the lower pressure plate 2 into the first guide hole 1.1 of the guide plate 1 from the upper side of the guide plate 1, and insert the second guide key 2.2 on the second frustum 2.1 into the second guide groove (i.e. guide groove 5) on the inner circumferential surface of the first guide hole 1.1 until the pressing part 6 on the lower side of the lower pressure plate 2 is in contact with the upper end of the magnet assembly 7.

[0052] Example 3, based on the auxiliary tooling for pressing magnets in the rotor assembly of the drive motor provided in Example 1, provides an auxiliary tooling for pressing magnets in the rotor assembly of the drive motor. In this Example 3, the auxiliary tooling for pressing magnets includes multiple pressing fixtures. In the rotor core of the skew-pole drive motor, a pressing fixture is provided for each core segment 3 with a different deflection angle. The position of the guide hole group on the guide plate 1 of the press fixture corresponds to the position of the magnetic groove group 3.2 on the corresponding iron core segment 3; the first frustum 4 is used to insert into the center hole of the corresponding iron core segment 3 to coaxially position the guide plate 1 and the corresponding iron core segment 3; the first guide groove is used to cooperate with the first guide key 3.1 in the center hole of the corresponding iron core segment 3 to circumferentially position the guide plate 1 and the corresponding iron core segment 3; The pressing part 6 on the lower pressing plate 2 is used to press the magnet group 7 of the guide hole group on the guide plate 1, which is inserted into the same pressing fixture, into the magnet groove group 3.2 of the corresponding iron core section 3.

[0053] Because each core segment 3 of the rotor core of the skew-pole drive motor rotor assembly has multiple deflection angles, the position of the first guide key 3.1 in the center hole of each core segment 3 also needs to be deflected according to the deflection angle of the core segment 3 (because after each core segment 3 is finally stacked into the rotor core, each first guide key 3.1 needs to be connected as a whole to form a connecting key to connect with the connecting groove key on the rotor shaft), a single press-fitting fixture cannot be universally used on any two core segments 3 with different deflection angles.

[0054] The above-mentioned preferred solution provides a pressing fixture for each core segment 3 with a different deflection angle in the rotor core of the skew-pole drive motor rotor assembly. This makes the magnet pressing auxiliary tooling for the rotor assembly of the drive motor provided by the present invention applicable to the magnet pressing of each core segment 3 of the rotor core of the skew-pole drive motor, thus improving versatility.

[0055] Based on the auxiliary tooling for pressing magnets into the rotor assembly of the drive motor provided in Embodiment 3, Embodiment 4 provides a... The magnet pressing method for the rotor assembly of the drive motor includes: Step A: Place any core segment 3 of the rotor core of the skew-pole drive motor that has not yet completed magnet pressing on onto the pressing base, with one end face of the core segment 3 facing upwards. Step B: Based on the deflection angle of the core segment 3, select the pressing fixture corresponding to the core segment 3 from among the pressing fixtures of the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by the above preferred scheme. Step C: Insert the first frustum 4 on the guide plate 1 of the selected press fixture into the center hole of the iron core section 3 from the upper side of the iron core section 3, and insert the first guide key 3.1 in the center hole into the first guide groove on the first frustum 4 until the lower side of the guide plate 1 is in contact with the upper end face of the iron core section 3. Step D: Insert the magnet assembly 7 into the guide hole assembly on the guide plate 1; Step E: Place the lower pressure plate 2 of the selected pressing fixture on the upper side of the guide plate 1, so that the pressing part 6 on the lower side of the lower pressure plate 2 fits against the upper end of the magnet assembly 7; and complete the coaxial positioning and circumferential positioning between the lower pressure plate 2 and the guide plate 1. Step F: Press down the pressing plate 2 using the pressing mechanism, so that the pressing part 6 presses the magnet group 7 inserted into the guide hole group into the magnet slot group 3.2 of the iron core section 3, thus completing the magnet pressing of the iron core section 3; Repeat steps A through F until all the magnets of all core segments 3 of the rotor core are press-fitted.

[0056] In this embodiment 4, the method for coaxial and circumferential positioning between the pressure plate 2 and the guide plate 1 is the same as the method for coaxial and circumferential positioning between the pressure plate 2 and the guide plate 1 in embodiment 2.

[0057] The auxiliary tooling and pressing method for pressing magnets into the rotor assembly of the drive motor provided in the above embodiments have at least the following technical effects or advantages: 1. The auxiliary tooling for pressing magnets in the rotor assembly of the drive motor provided by the present invention, by setting a guide plate 1 and a lower pressure plate 2, and utilizing the first frustum 4 and the first guide groove, can achieve coaxial and circumferential positioning between the guide plate 1 and the core segment 3. Then, each magnet in the magnet group 7 is inserted one by one into the corresponding guide hole in the guide hole group on the guide plate 1, so that the pressing and positioning between all the magnets in the magnet group 7 and the core segment 3 can be completed in one go. Then, by using the lower pressure mechanism to press down the lower pressure plate 2, all the magnets in the magnet group 7 can be pressed in one go. The assembly consistency is high, the pressing efficiency is high, and the lower pressure mechanism can also press the magnet group 7 inserted into the guide hole group into the magnet groove group 3 of the core segment 3. During the pressing process, the guide hole group is used to limit the magnet group 7, and the pressing of the magnet group 7 is guided during the pressing process. This ensures that each magnet of the magnet group 7 can be accurately pressed into the corresponding magnet groove in the magnet groove group 3.2 along the downward pressing direction, which is not easy to damage the magnet. Therefore, the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by this invention has the advantages of quick and accurate pressing positioning, simple positioning operation, high magnet assembly accuracy and high pressing efficiency. It solves the technical problem that existing magnet pressing processes usually have difficulty in balancing the simplicity and accuracy of pressing positioning with pressing efficiency and magnet assembly accuracy.

[0058] 2. By setting a first limiting structure and a second limiting structure, the first limiting structure and the second limiting structure cooperate with each other during the process of the lower pressure plate 2 pressing down on the magnet group 7 inserted into the guide hole group. This fixes the circumferential positioning and coaxial positioning between the lower pressure plate 2 and the guide plate 1, so that the lower pressure plate 2 can always press down along the pressing direction during the pressing process, without axial tilting or circumferential rotation. This provides a stable and uniform downward pressure for the magnet group 7 inserted into the guide hole group, further improving the pressing accuracy and the assembly consistency of each magnet in the magnet group 7 after pressing. It also ensures that the posture of each magnet in the magnet group 7 will not tilt due to changes in downward pressure during the pressing process, reducing the risk of scratches, damage and breakage of the magnets during the pressing process.

[0059] 3. By aligning the outer circumferential surface of the pressure block with the inner circumferential surface of the corresponding guide hole, and ensuring that the lengths of each pressure block are the same in the vertical direction, the circumferential and coaxial positioning between the lower pressure plate 2 and the guide plate 1 can be further fixed after the pressure plate 2 is pressed down and each pressure block enters the corresponding guide hole; this further improves the assembly consistency of each magnet in the magnet assembly 7 after pressing.

[0060] 4. By making the length of the pressure block in the vertical direction equal to the thickness of the guide plate 1 in the vertical direction, when using the magnet pressing auxiliary tooling of the rotor assembly of the drive motor provided by this invention to perform magnet pressing of each core segment 3 of the rotor core, it is possible not only to determine whether the magnet group 7 has been pressed into place by whether the lower side of the pressure plate 2 is in contact with the upper side of the guide plate 1 (since when the lower side of the pressure plate 2 is in contact with the upper side of the guide plate 1, the upper end face of each magnet of the magnet group 7 is flush with the end face of the core segment 3), but also to ensure that the pressure plate 2 does not overpress the magnet group 7.

[0061] 5. By providing a pressing fixture for each core segment 3 of the rotor core of the skew-pole drive motor with a different deflection angle, the magnet pressing auxiliary tooling for the rotor assembly of the drive motor provided by this invention can also be applied to the magnet pressing of each core segment 3 of the rotor core of the skew-pole drive motor, thus improving versatility.

[0062] 6. By adjusting the shape and position of each guide hole in the guide hole group, the core section 3 of various magnet geometric arrangement forms can be adapted (such as but not limited to: straight type, V type, double V type, triple V type, etc.), which can be used for magnet pressing of embedded permanent magnet rotors with various magnet geometric arrangement forms.

[0063] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. An auxiliary tooling for pressing magnets into the rotor assembly of a drive motor, characterized in that, Includes a press-fit fixture; the press-fit fixture includes a guide plate and a lower pressure plate coaxially disposed on the upper side of the guide plate; The guide plate is provided with a set of guide holes that cooperate with the magnet assembly. The position of the set of guide holes corresponds to the position of the magnet slot assembly on the core section of the rotor core of the rotor assembly. A first frustum is coaxially arranged on the lower side of the guide disk. The lower side of the guide disk is used to fit against the end face of the iron core segment. The first frustum is used to insert into the center hole of the iron core segment to coaxially position the guide disk and the iron core segment. A first guide groove is formed on the outer circumferential surface of the first frustum along the vertical direction. The first guide groove is used to cooperate with a first guide key in the center hole of the iron core segment to circumferentially position the guide disk and the iron core segment. The upper side of the pressure plate is used to contact the pressure head of the pressure mechanism, and the lower side of the pressure plate is provided with a pressing part, which is used to press the magnet group inserted into the guide hole group into the magnet groove group of the iron core section.

2. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 1, characterized in that: The pressure plate is provided with a first limiting structure and the guide plate is provided with a second limiting structure; the first limiting structure and the second limiting structure are used to cooperate with each other during the process of the pressure plate pressing down to insert the magnet group into the guide hole group, so as to fix the circumferential positioning and coaxial positioning between the pressure plate and the guide plate.

3. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 2, characterized in that: The first limiting structure includes a second frustum coaxially disposed on the lower side of the pressure plate, and a second guide key disposed on the outer peripheral surface of the second frustum. The second limiting structure includes a first guide hole coaxially formed on the upper side of the guide disk, and a second guide groove formed on the inner circumferential surface of the first guide hole. The lower end of the first guide hole extends to the lower end face of the first frustum portion. The second guide groove extends along the vertical direction, with the upper end of the second guide groove extending to the upper side of the guide disk and the lower end of the second guide groove extending to the lower end face of the first frustum portion. The second frustum portion is used to insert into the first guide hole, and the outer peripheral surface of the second frustum portion mates with the inner peripheral surface of the first guide hole to coaxially position the pressure plate and the guide plate; the second guide key is used to mate with the second guide groove to circumferentially position the pressure plate and the guide plate.

4. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 1, characterized in that: The guide hole group includes multiple guide holes formed on the guide disk, each guide hole penetrating the guide disk along the vertical direction; the number of guide holes is the same as the number of magnet slots in the magnet slot group, and they are arranged in a one-to-one correspondence; the guide holes are used to insert magnets in the magnet group for loading into the corresponding magnet slots, and the inner circumferential surface of the guide holes mates with the outer circumferential surface of the magnets in the magnet group for loading into the corresponding magnet slots.

5. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 4, characterized in that: The pressing part includes multiple pressing blocks, and the upper end of each pressing block is fixedly connected to or integrally formed on the lower side of the lower pressing plate. The number of pressure blocks is the same as the number of guide holes, and they are set in a one-to-one correspondence; the pressure blocks are used to press the magnets inserted into the corresponding guide holes into the corresponding magnet slots.

6. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 5, characterized in that: The outer peripheral surface of the pressure block mates with the inner peripheral surface of the corresponding guide hole. The length of each pressure block in the vertical direction is the same, and the length of the pressure block in the vertical direction is not less than the thickness of the guide plate in the vertical direction.

7. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 6, characterized in that: The length of the pressure block in the vertical direction is equal to the thickness of the guide disc in the vertical direction.

8. The auxiliary tooling for pressing magnets into the rotor assembly of the drive motor according to claim 1, characterized in that: The magnetic steel pressing auxiliary tooling includes multiple pressing fixtures; In the rotor assembly of the skew-pole drive motor, each core segment with a different deflection angle is provided with a corresponding pressing fixture; The position of the guide hole group on the guide plate of the press-fit fixture corresponds to the position of the magnetic groove group on the corresponding iron core segment; the first frustum is used to insert into the center hole of the corresponding iron core segment to coaxially position the guide plate and the corresponding iron core segment; the first guide groove is used to cooperate with the first guide key in the center hole of the corresponding iron core segment to circumferentially position the guide plate and the corresponding iron core segment. The pressing part on the lower pressure plate is used to press the magnet group of the guide hole group on the guide plate of the same pressing fixture into the magnet slot group of the corresponding iron core segment.

9. A method for pressing magnets into the rotor assembly of a drive motor, characterized in that, The magnet pressing method includes: Step 1: Place any core segment of the rotor core of the rotor assembly that has not yet been pressed with magnets on the pressing base, with one end face of the core segment facing upwards. Step 2: Insert the first frustum portion on the guide plate of the pressing fixture of the magnet pressing auxiliary tooling of the rotor assembly of the drive motor as described in any one of claims 1 to 7 into the center hole of the iron core segment from the upper side of the iron core segment, and insert the first guide key in the center hole into the first guide groove on the first frustum portion until the lower side of the guide plate is in contact with the upper end face of the iron core segment. Step 3: Insert the magnet assembly into the guide hole assembly on the guide plate; Step 4: Place the lower pressure plate of the pressing fixture on the upper side of the guide plate, so that the pressing part on the lower side of the lower pressure plate fits against the upper end of the magnet assembly; and complete the coaxial positioning and circumferential positioning between the lower pressure plate and the guide plate; Step 5: Use the pressing mechanism to press down the pressing plate, so that the pressing part presses the magnet group inserted into the guide hole group into the magnet slot group of the iron core section, thus completing the magnet pressing of the iron core section; Repeat steps 1 to 5 above until the magnets of all core segments of the rotor core are fully press-fitted.

10. A method for pressing magnets into the rotor assembly of a drive motor, characterized in that, The magnet pressing method includes: Step A: Place any core segment of the rotor core of the skew-pole drive motor that has not yet been pressed with magnets on the pressing base, with one end face of the core segment facing upwards. Step B: Based on the deflection angle of the core segment, select the pressing fixture corresponding to the core segment from among the pressing fixtures of the magnet pressing auxiliary tooling of the rotor assembly of the drive motor as described in claim 8. Step C: Insert the first frustum portion on the guide plate of the selected press-fitting fixture into the center hole of the iron core segment from the upper side of the iron core segment, and insert the first guide key in the center hole into the first guide groove on the first frustum portion until the lower side of the guide plate is in contact with the upper end face of the iron core segment. Step D: Insert the magnet assembly into the guide hole assembly on the guide plate; Step E: Place the lower pressure plate of the selected pressing fixture on the upper side of the guide plate, so that the pressing part on the lower side of the lower pressure plate fits against the upper end of the magnet assembly; and complete the coaxial positioning and circumferential positioning between the lower pressure plate and the guide plate. Step F: Use the pressing mechanism to press down the pressing plate, so that the pressing part presses the magnet group inserted into the guide hole group into the magnet slot group of the iron core section, thus completing the magnet pressing of the iron core section; Repeat steps A through F above until the magnets of all core segments of the rotor core are fully press-fitted.

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