Rotor structure assembly tool

Abstract

The utility model belongs to motor assembly technical field discloses a rotor structure assembly tool, this rotor structure assembly tool is used for assembling rotor structure, can realize quick assembly of rotor structure without the magnetic bridge, and has the advantage that the assembly efficiency is high, through positioning to each part, not only can play the effect of preventing the stupid, can improve the assembly accuracy, and the above -mentioned rotor structure assembly tool still has the advantage that the structure is simple, the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly technology, and in particular to a rotor structure assembly fixture. Background Technology

[0002] The rotor structure of a permanent magnet synchronous motor features a magnetic bridge, which exhibits significant magnetic leakage. As the maximum motor speed increases, the centrifugal force at that speed also increases. Considering structural strength requirements, the rotor design dictates that a thicker magnetic bridge is necessary to accommodate higher maximum speeds. However, using a thicker magnetic bridge undoubtedly exacerbates magnetic leakage, leading to lower magnet utilization and increased motor cost. Furthermore, the magnetic bridge increases the inductance of the D-axis and reduces the inductance difference between the D and Q axes, thus decreasing the motor's reluctance torque and requiring more magnets, further increasing motor cost.

[0003] To address this, related technologies have proposed eliminating the magnetic isolation bridge to improve magnet utilization. However, this approach suffers from low assembly efficiency. Therefore, a rotor structure assembly fixture is urgently needed to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a rotor structure assembly tooling that can improve the assembly efficiency of rotor structures.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The rotor structure assembly fixture includes two balancing rings spaced apart along the axial direction, a first iron core fixed axially between the two balancing rings, a second iron core spaced apart circumferentially around the first iron core, a magnet disposed between the first iron core and the second iron core, and a pressure bar axially inserted into the first iron core and at least one of the balancing rings. Each balancing ring is equipped with a force-applying member corresponding to the pressure bar. The force-applying member is connected to the balancing ring located at the same axial end of the second iron core and one end of the force-applying member abuts against the corresponding pressure bar, so that the pressure bar presses against the corresponding second iron core in a direction close to the central axis of the first iron core.

[0007] The rotor assembly fixture includes a base with mounting and positioning holes, the inner wall of which has a first positioning part for positioning the first iron core; one side of the base has:

[0008] A positioning protrusion is used for axial insertion with the balance ring;

[0009] The positioning rod is used for axial insertion with the second iron core;

[0010] The positioning sleeve, the positioning rod, the mounting positioning hole and the positioning protrusion are all located inside the positioning sleeve; the positioning sleeve is installed on the base, and the positioning sleeve has an assembly clearance hole that extends through to the peripheral wall of the positioning sleeve at one end near the base; the force-applying member passes through the assembly clearance hole and is connected to the balance ring; the inner peripheral wall of the positioning sleeve forms a positioning circumferential surface for positioning the second iron core.

[0011] As one possible implementation of the above-mentioned rotor structure assembly tooling, multiple assembly clearance holes are provided, and the multiple assembly clearance holes are arranged at intervals along the circumference of the positioning sleeve.

[0012] As one possible implementation of the above-mentioned rotor structure assembly tooling, the top surface of the base and one of the positioning sleeves are provided with a sleeve positioning part, and the other is provided with a positioning stop, and the positioning stop is axially inserted into the sleeve positioning part.

[0013] As one possible implementation of the above-mentioned rotor structure assembly tooling, the sleeve positioning part is an annular boss protruding from the base, the positioning rod and the positioning protrusion are both installed on the sleeve positioning part, and the mounting positioning hole is provided on the sleeve positioning part and is coaxially arranged with the sleeve positioning part.

[0014] As one possible implementation of the above-mentioned rotor structure assembly tooling, the sleeve positioning part is provided with threaded mounting holes corresponding to the positioning rods one by one, one end of the positioning rod is threaded to the threaded mounting hole, and the other end extends out of the threaded mounting hole.

[0015] As one possible implementation of the above-mentioned rotor structure assembly tooling, the bottom of the base is provided with a plurality of supporting feet, which are arranged circumferentially along the mounting positioning holes to form a clearance space.

[0016] As one possible implementation of the above-mentioned rotor structure assembly tooling, the rotor structure further includes a tie rod and a locking nut, wherein the tie rod passes through the first iron core and its two ends pass through the two balance rings respectively;

[0017] The sleeve positioning part is provided with an installation clearance hole. The installation clearance hole is provided through the sleeve positioning part and the base along the axial direction of the positioning rod. The installation clearance hole is used to avoid the pull rod and the locking nut and to form an operating space for tightening the locking nut.

[0018] As one possible implementation of the above-mentioned rotor structure assembly tooling, along the radial direction of the mounting positioning hole, the mounting clearance hole is closer to the mounting positioning hole than the supporting foot.

[0019] As one possible implementation of the above-mentioned rotor structure assembly tooling, the inner diameter of the positioning sleeve is larger than the outer diameter of the first iron core and the outer diameter of the second iron core.

[0020] As one possible implementation of the above-mentioned rotor structure assembly tooling, the maximum axial length of the positioning sleeve is not greater than the sum of the axial length of the sleeve positioning part and the maximum axial length of the first iron core.

[0021] The beneficial effects of this utility model are:

[0022] The rotor structure assembly fixture provided by this utility model can achieve rapid assembly of rotor structures without magnetic bridges when assembling rotor structures, and has the advantage of high assembly efficiency. By positioning each part, it can not only prevent mistakes, but also improve assembly accuracy. Moreover, the above-mentioned rotor structure assembly fixture also has the advantages of simple structure and low cost. Attached Figure Description

[0023] Figure 1 This is a top view of the rotor structure provided in this embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A magnified view of a portion of point I in the middle;

[0025] Figure 3 yes Figure 1 Sectional view along axis AA;

[0026] Figure 4 yes Figure 3 A magnified view of a portion of point M in the middle;

[0027] Figure 5 This is a cross-sectional view of the rotor structure provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the fit between the second iron core and the pressure rod provided in this embodiment of the utility model;

[0029] Figure 7 yes Figure 6 A magnified view of a portion of point J;

[0030] Figure 8 This is a top view of the balance ring provided in an embodiment of the present invention;

[0031] Figure 9 yes Figure 8 Sectional view along the BB direction;

[0032] Figure 10 This is a schematic diagram of the structure of the pressure bar provided in this embodiment of the utility model;

[0033] Figure 11 yes Figure 10 A magnified view of a section at point K;

[0034] Figure 12 This is a top view of the first iron core provided in this embodiment of the utility model;

[0035] Figure 13 This is a side view of the drive shaft provided in an embodiment of the present invention;

[0036] Figure 14 This is a front view of the rotor structure assembly fixture when the rotor structure is completed according to the embodiment of this utility model;

[0037] Figure 15 yes Figure 14 C-axis sectional view;

[0038] Figure 16 yes Figure 15 A magnified view of a portion of point N;

[0039] Figure 17 yes Figure 15 A magnified view of a portion of point P in the middle;

[0040] Figure 18 yes Figure 14 Top view;

[0041] Figure 19 This is a schematic diagram of the structure of the base provided in an embodiment of the present utility model;

[0042] Figure 20 This is a schematic diagram of the positioning sleeve provided in an embodiment of the present utility model.

[0043] In the picture:

[0044] 1. Balance ring; 11. Shaft clearance hole; 12. First through hole; 13. First guide hole; 14. Locking hole; 15. Clearance through hole; 16. Assembly positioning groove;

[0045] 2. First iron core; 21. Shaft hole; 22. Second through hole; 23. Locating key; 24. Mounting slot; 241. Magnet slot;

[0046] 3. Second iron core; 31. Second guide hole; 311. Second pressing surface; 32. Positioning through hole;

[0047] 4. Magnets;

[0048] 5. Pressure bar; 51. First pressing part; 52. Second pressing part; 521. First pressing surface; 53. Step limiting surface;

[0049] 6. Force-applying components;

[0050] 7. Drive shaft; 71. Keyway;

[0051] 8. Tie rod; 9. Locking nut;

[0052] 10. Base; 101. Mounting positioning hole; 1011. First positioning part; 102. Positioning protrusion; 103. Threaded mounting hole; 104. Support foot; 105. Mounting clearance hole; 106. Sleeve positioning part;

[0053] 20. Positioning rod;

[0054] 30. Positioning sleeve; 301. Assembly clearance hole; 302. Positioning stop; 303. Positioning circumferential surface. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0056] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0059] This utility model provides a rotor structure assembly fixture to improve assembly efficiency. The following description uses a permanent magnet motor rotor structure as an example to illustrate the structure of this rotor structure assembly fixture.

[0060] like Figures 1 to 11 As shown, the rotor structure includes two balance rings 1, a first iron core 2, a second iron core 3, a magnet 4, a pressure rod 5, and a force-applying component 6. The two balance rings 1 are axially spaced apart. The first iron core 2 is located between the two balance rings 1 and fixed to the balance rings 1. Multiple second iron cores 3 are provided. Multiple second iron cores 3 are arranged circumferentially around the outer periphery of the first iron core 2. The magnet 4 is located between the first iron core 2 and the second iron core 3. The pressure rod 5 is correspondingly arranged with the second iron core 3 and axially inserted. Each pressure rod 5 is axially inserted with at least one balance ring 1 and can move radially relative to the balance ring 1 and the corresponding second iron core 3.

[0061] Each balance ring 1 is equipped with a force-applying member 6 corresponding to the pressure bar 5. The force-applying member 6 is connected to the balance ring 1 located at the same end of the axis of the second iron core 3, and one end of the force-applying member 6 abuts against the corresponding pressure bar 5, so that the pressure bar 5 presses against the corresponding second iron core 3 in a direction close to the central axis of the first iron core 2.

[0062] When assembling the rotor structure described above, the pressure rod 5 passes through the second iron core 3 and is axially inserted into at least one balance ring 1. The force-applying member 6 is installed on the balance ring 1, and one end of the force-applying member 6 presses against the pressure rod 5, so that the force-applying member 6 applies force to the pressure rod 5. The force-applying member 6 pushes the pressure rod 5 to move towards the side closer to the central axis of the first iron core 2, so that the pressure rod 5 is pressed against the corresponding second iron core 3 in the direction close to the central axis of the first iron core 2, so that the second iron core 3 is installed on the pressure rod 5.

[0063] The rotor structure has a simple assembly method and high assembly efficiency. Moreover, by using the cooperation of the pressure rod 5 and the force application component 6, the pressure rod 5 is pressed against the corresponding second iron core 3 along the direction close to the central axis of the first iron core 2, thereby fixing the second iron core 3. This realizes the design of the rotor structure without magnetic shielding components, which can improve the utilization rate of the magnet 4, reduce the cost of the rotor structure, and improve the stability and reliability of the rotor structure.

[0064] The motor using the rotor structure described above can improve the utilization rate of the magnet 4, reduce the cost of the motor, and improve the reliability of the motor.

[0065] In some embodiments, such as Figure 3 As shown, the pressure rod 5 passes through the corresponding second iron core 3 along its own axial direction, and the two ends of the pressure rod 5 are inserted into the two balance rings 1 one by one.

[0066] Each pressure rod 5 is simultaneously inserted into two balance rings 1, and each pressure rod 5 is equipped with two force-applying parts 6 at both ends of its axial direction, which enables the pressure rod 5 to more stably fix the second iron core 3.

[0067] As an alternative, each second iron core 3 can be equipped with two pressure rods 5, which are located at the two ends of the axial direction of the second iron core 3 respectively. Each pressure rod 5 is pressed against the second iron core 3 under the action of a force-applying member 6, that is, the two ends of the axial direction of the second iron core 3 are fixed by a pressure rod 5.

[0068] In some embodiments, such as Figures 4 to 9 As shown, the force-applying component 6 extends radially along the balance ring 1 and is threadedly connected to the balance ring 1. Specifically, the balance ring 1 is provided with a locking hole 14 and a first guide hole 13 that extends axially along the balance ring 1. The locking hole 14 extends radially along the balance ring 1, with one end extending to the outer peripheral wall of the balance ring 1 and the other end extending to the inner peripheral wall of the first guide hole 13. The second iron core 3 is provided with a second guide hole 31 that is axially opposite to the first guide hole 13. The pressure rod 5 passes through the first guide hole 13, and both ends of the pressure rod 5 are correspondingly inserted into the second guide holes 31 of the two balance rings 1. The force-applying component 6 is threadedly connected to the locking hole 14. Tightening the force-applying component 6 causes it to push the pressure rod 5 to move towards the side closer to the central axis of the first iron core 2 until the pressure rod 5 presses against the second iron core 3.

[0069] In some embodiments, such as Figures 4 to 11 As shown, the pressure rod 5 includes a first pressing part 51 that is axially inserted into the first guide hole 13. The first pressing part 51 can move radially within the first guide hole 13 relative to the balance ring 1. The pressure rod 5 includes a second pressing part 52. Each of the two axial ends of the second pressing part 52 is connected to a first pressing part 51. The second iron core 3 corresponding to the pressure rod 5 with the second pressing part 52 is provided with the aforementioned second guide hole 31. The second guide hole 31 is axially inserted into the second pressing part 52. The second pressing part 52 can move radially within the second guide hole 31 relative to the balance ring 1. When the surface of the second pressing part 52 near the center of the first iron core 2 abuts against the inner wall of the second guide hole 31 along the radial direction of the first iron core 2, the first pressing part 51 and the first guide hole 13 are in clearance fit.

[0070] With the above configuration, when the force-applying component 6 is turned to push the pressure rod 5 towards the side closer to the central axis of the first iron core 2, when the surface of the second pressing part 52 near the center of the second iron core 3 abuts against the inner wall of the second guide hole 31, there is a small gap between the surface of the first pressing part 51 near the central axis of the first iron core 2 and the inner wall of the first guide hole 13, so that the pressure rod 5 presses against the second iron core 3.

[0071] In some embodiments, such as Figures 4 to 11 As shown, the cross-section of the first pressing part 51 perpendicular to its own axis and the cross-section of the first guide hole 13 perpendicular to its own axis are both rectangular. The moving direction of the first pressing part 51 in the first guide hole 13 is parallel to one side of the rectangle. This arrangement makes it convenient for the force-applying member 6 to come into contact with the first pressing part 51 when they abut against each other, which is beneficial for the force-applying member 6 to push the first pressing part 51 to move closer to the central axis of the first iron core 2.

[0072] In some embodiments, such as Figures 4 to 11 As shown, the cross-section of the second pressing part 52 perpendicular to its own axis and the cross-section of the second guide hole 31 perpendicular to its own axis are both trapezoidal. Along the radial direction of the first iron core 2, the short base of the trapezoid is closer to the central axis of the first iron core 2 than the long base of the trapezoid. The movement direction of the second pressing part 52 in the second guide hole 31 is perpendicular to the short base of the trapezoid.

[0073] The second pressing part 52 has two first pressing surfaces 521 arranged opposite each other along the circumference of the first iron core 2. The cross-section of the two first pressing surfaces 521 perpendicular to the axial direction of the second pressing part 52 is the two waists of a trapezoid. The inner walls of the two holes of the second guide hole 31 arranged opposite each other along the circumference of the first iron core 2 each form a second pressing surface 311. When the rotor structure is assembled, the two first pressing surfaces 521 press against the two second pressing surfaces 311 in a one-to-one correspondence. When the motor using this rotor structure is working, the second iron core 3 will generate centrifugal force when the rotor structure rotates. Since the cross-section of the second pressing part 52 perpendicular to its own axial direction and the cross-section of the second guide hole 31 perpendicular to its own axial direction are both trapezoidal, and the two first pressing surfaces 521 press against the two second pressing surfaces 311 in a one-to-one correspondence, under the premise that the pressure rod 5 is firmly fixed under the action of the force-applying member 6, the centrifugal force will increase the force between the first pressing surface 521 and the second pressing surface 311 that it abuts against, which will further fix the second iron core 3.

[0074] In some embodiments, a stepped limiting surface 53 facing the balance ring 1 is formed at the junction of the first pressing part 51 and the second pressing part 52, and the stepped limiting surface 53 and the balance ring 1 abut against each other axially.

[0075] When assembling the rotor structure, the step limiting surface 53 and the balance ring 1 can be used to axially limit the pressure rod 5.

[0076] In some embodiments, such as Figure 4 As shown, the force-applying component 6 does not protrude from the outer peripheral wall of the balance ring 1. This arrangement avoids interference with other structures caused by the force-applying component 6 protruding from the outer peripheral wall of the balance ring 1. It should be noted that after installation, the end of the force-applying component 6 away from the pressure rod 5 can be located on the same circumferential surface as the outer peripheral wall of the balance ring 1, or the end of the force-applying component 6 away from the pressure rod 5 can be spaced apart from the outer peripheral wall of the balance ring 1.

[0077] In some embodiments, such as Figure 3 , Figure 5 , Figure 6 , Figure 8 , Figure 9 and Figure 12 As shown, the rotor structure also includes a tie rod 8, which passes through the first iron core 2. The two ends of the tie rod 8 pass through the two balance rings 1 one by one and are threaded with locking nuts 9.

[0078] Specifically, the balance ring 1 has a first through hole 12 extending along its own axis, and the first iron core 2 has a second through hole 22 extending along its own axis. The pull rod 8 passes through the second through hole 22, and the two ends of the pull rod 8 correspondingly pass through the first through holes 12 of the two balance rings 1. Each end of the pull rod 8 is connected to a locking nut 9. By tightening the locking nut 9, the first iron core 2 is clamped between the two balance rings 1, thereby fixing the first iron core 2 and the balance ring 1 relatively.

[0079] In some embodiments, such as Figure 5 As shown, there are multiple tie rods 8, which are arranged at equal intervals around the first iron core 2. This arrangement can improve the connection stability between the first iron core 2 and the balance ring 1, as well as the uniformity of force distribution.

[0080] For example, there are six second iron cores 3 and six tie rods 8. A tie rod 8 is arranged between two adjacent second iron cores 3. In other words, the tie rods 8 and the second iron cores 3 are arranged alternately around the first iron core 2.

[0081] It should be noted that the number of second iron cores 3 can be six, four, or eight, etc., which will not be listed here.

[0082] In some embodiments, such as Figure 5 and Figure 12As shown, a magnet groove 241 is provided on each of the two opposite inner sidewalls of the mounting groove 24 distributed along the circumference of the first iron core 2. A magnet 4 is arranged in each magnet groove 241, and the magnet 4 is located between the second iron core 3 and the bottom wall of the magnet groove 241.

[0083] For example, the mounting groove 24 is generally a V-shaped groove. Along the direction from the bottom to the opening of the mounting groove 24, the magnet 4 is confined between the two opposing inner walls of the magnet groove 241. The magnet groove 241 is axially continuous along the first iron core 2, and the two magnets 4 arranged in the same mounting groove 24 are distributed in a V-shape. When installing the magnet 4, it is only necessary to insert the magnet 4 into the magnet groove 241 along the axial direction of the first iron core 2.

[0084] As an alternative, the mounting slot 24 can also be a straight slot, with a magnet slot 241 formed on the bottom wall of the mounting slot 24, and a magnet 4 placed inside the magnet slot 241. The cross-section of the magnet 4 perpendicular to the axial direction of the first iron core 2 is approximately straight. The mounting slot 24 can also be a U-shaped slot with a gradually widening opening. A magnet slot 241 is provided on the inner walls of two opposite slots distributed circumferentially along the first iron core 2, and on the bottom wall of the U-shaped slot. One magnet 4 is placed inside each magnet slot 241, and the three magnets 4 corresponding to the same mounting slot 24 are arranged in a U-shape. The mounting slot 24 can also be a W-shaped slot, with a magnet slot 241 formed on each of the four inner walls of the U-shaped slot, and one magnet 4 placed inside each magnet slot 241. The four magnets 4 corresponding to the same mounting slot 24 are arranged in a W-shape. The mounting slot 24 can also be an arc-shaped slot located on the outer circumferential wall of the first iron core 2 and extending circumferentially along the first iron core 2, with one magnet 4 directly arranged inside each mounting slot 24.

[0085] It should be noted that each second iron core 3 can be equipped with one pressure rod 5, or two or more parallel pressure rods 5. The specific number of pressure rods 5 is determined according to the shape of the mounting groove 24. For example, when the mounting groove 24 adopts a W-shaped groove, each second iron core 3 can be equipped with two pressure rods 5. Specifically, the W-shaped groove is divided into two connected V-shaped grooves, and each part of the second iron core 3 placed in the W-shaped groove is equipped with one pressure rod 5 in the inner part of the two V-shaped grooves. When the mounting groove 24 adopts a straight groove, a V-shaped groove, an arc groove, or a U-shaped groove, each second iron core 3 can be equipped with one pressure rod 5.

[0086] Accordingly, the shape of the second iron core 3 is determined according to the shape of the mounting groove 24, but it is necessary to ensure that the outer peripheral surface of the second iron core 3 and the outer peripheral surface of the first iron core 2 are located on the same arc surface.

[0087] In some embodiments, such as Figure 12 and Figure 13As shown, the first iron core 2 is provided with a shaft hole 21 coaxial with its own central axis. A drive shaft 7 with both ends extending out of the first iron core 2 is provided in the shaft hole 21. One of the inner peripheral walls of the shaft hole 21 and the outer peripheral wall of the drive shaft 7 is provided with a keyway 71, and the other is provided with a positioning key 23. The keyway 71 and the positioning key 23 are inserted along the axial direction of the first iron core 2, which can not only guide the assembly between the drive shaft 7 and the first iron core 2, but also restrict the rotation of the first iron core 2 relative to the drive shaft 7, even if the two can rotate synchronously.

[0088] For example, the shaft hole 21 and the drive shaft 7 are interference-fitted, and the connection between the first iron core 2 and the drive shaft 7 is stable.

[0089] For example, the keyway 71 is disposed on the outer peripheral wall of the drive shaft 7, and the positioning key 23 is disposed on the inner peripheral wall of the shaft hole 21. As an alternative, the keyway 71 can also be disposed on the inner peripheral wall of the shaft hole 21, and the positioning key 23 can be disposed on the outer peripheral wall of the drive shaft 7.

[0090] In some embodiments, such as Figure 8 and Figure 9 As shown, both balance rings 1 are provided with shaft clearance holes 11 for the drive shaft 7 to pass through, so that the drive shaft 7 can be connected to other structures.

[0091] An embodiment of this utility model also provides a rotor structure assembly fixture for assembling the above-mentioned rotor structure, so as to simplify the assembly of the rotor structure and improve the assembly efficiency of the rotor structure.

[0092] like Figures 14 to 20 As shown, the rotor assembly fixture includes a base 10 with a mounting and positioning hole 101. The inner wall of the mounting and positioning hole 101 has a first positioning part 1011 for positioning the first iron core 2. One side of the base 10 has a positioning protrusion 102, a positioning rod 20, and a positioning sleeve 30. The positioning protrusion 102 is used to axially insert with the balance ring 1. The positioning rod 20 is used to axially insert with the second iron core 3. The positioning rod 20, the mounting and positioning hole 101, and the positioning protrusion 102 are all located inside the positioning sleeve 30. The positioning sleeve 30 is installed on the base 10. One end of the positioning sleeve 30 near the base 10 has an assembly clearance hole 301 that extends through to the peripheral wall of the positioning sleeve 30. The force-applying member 6 passes through the assembly clearance hole 301 and is connected to the balance ring 1. The inner peripheral wall of the positioning sleeve 30 forms a positioning circumferential surface 303 for positioning the second iron core 3.

[0093] When assembling the rotor structure, the first iron core 2 is oriented vertically, and the base 10 is located below the first iron core 2. The process of assembling the rotor structure using the above-mentioned rotor assembly fixture is as follows:

[0094] One of the balance rings 1 is mounted on the base 10, and the balance ring 1 is positioned using the positioning protrusion 102; the first iron core 2, on which the drive shaft 7 is mounted, is placed above the balance ring 1, with one end of the drive shaft 7 passing through the mounting positioning hole 101, and the first iron core 2 on which the drive shaft 7 is mounted is positioned using the first positioning part 1011; multiple second iron cores 3 are placed one by one into the mounting slots 24 of the first iron core 2, so that the positioning rod 20 passes through the second iron core 3, and the second iron core 3 is positioned using the positioning rod 20 in conjunction with the positioning circumferential surface 303; the pressure rod 5 is installed, so that... The pressure rod 5 passes through the second iron core 3 and is axially inserted into the lower balance ring 1; another balance ring 1 is placed above the second iron core 3, and the pressure rod 5 is axially inserted into the upper balance ring 1; a magnet 4 is axially inserted between the second iron core 3 and the first iron core 2; the two balance rings 1 and the first iron core 2 are connected, so that the first iron core 2 is clamped between the two balance rings 1 along its own axis; the force-applying member 6 is installed on the balance ring 1, so that one end of the force-applying member 6 abuts against the corresponding pressure rod 5, and the pressure rod 5 is pressed against the corresponding second iron core 3 in a direction close to the central axis of the first iron core 2.

[0095] The above-described process for assembling the rotor structure is simple, low-cost, and highly efficient. The rotor structure can be assembled without applying excessive force.

[0096] It should be noted that the outer wall of the drive shaft 7 is provided with a second positioning part for axially inserting into the first positioning part 1011. For example, the first positioning part 1011 is a boss located on the inner wall of the mounting positioning hole 101, and the second positioning part is a keyway 71 on the outer wall of the drive shaft 7. Through the axial insertion and engagement of the first positioning part 1011 and the keyway 71, the drive shaft 7 is positioned, thereby positioning the first iron core 2 mounted on the drive shaft 7.

[0097] In some embodiments, such as Figure 16 , Figure 19 and Figure 20 As shown, the top surface of the base 10 and one of the positioning sleeves 30 are provided with a sleeve positioning part 106, and the other is provided with a positioning stop 302. The positioning stop 302 and the sleeve positioning part 106 are axially inserted.

[0098] Specifically, the top surface of the base 10 is provided with a sleeve positioning part 106, and one end of the positioning sleeve 30 is provided with a positioning stop 302. The positioning stop 302 is an annular groove on the inner peripheral wall of one axial end of the positioning sleeve 30, and one end of the annular groove extends to the axial end face of the positioning sleeve 30. The sleeve positioning part 106 is an annular boss protruding from the top surface of the base 10.

[0099] The positioning sleeve 30 is positioned by axially inserting the positioning stop 302 into the sleeve positioning part 106, so that the positioning sleeve 30 can be detachably installed on the base 10, so as to facilitate the assembly of the positioning sleeve 30 according to the actual installation steps. As an alternative, the positioning sleeve 30 can also be directly fixed to the top surface of the base 10, or the positioning sleeve 30 can be integrally formed into the base 10.

[0100] In some embodiments, such as Figure 15 , Figure 16 and Figure 19 As shown, the positioning rod 20 and the positioning protrusion 102 are both mounted on the sleeve positioning part 106, and the mounting positioning hole 101 is provided in the sleeve positioning part 106 and is coaxially arranged with the sleeve positioning part 106. This arrangement ensures that the structural strength of the base 10 at the location of the positioning rod 20, the positioning protrusion 102, and the mounting positioning hole 101 meets the requirements.

[0101] In some embodiments, the sleeve positioning part 106 is integrally formed on the base 10, which simplifies the processing of the base 10 and the sleeve positioning part 106, reduces the number of parts, and lowers the cost.

[0102] In some embodiments, the inner diameter of the positioning sleeve 30 is larger than the outer diameter of the first iron core 2 and the outer diameter of the second iron core 3, so that the positioning sleeve 30 will not affect the installation of the first iron core 2 and the second iron core 3.

[0103] In some embodiments, such as Figure 15 and Figure 17 As shown, the maximum axial length of the positioning sleeve 30 is not greater than the sum of the axial length of the sleeve positioning part 106 and the maximum axial length of the first iron core 2. This arrangement allows the upper balance ring 1 to be exposed during rotor assembly, facilitating the screwing of the force-applying component 6 installed on the upper balance ring 1.

[0104] In some embodiments, such as Figure 16 , Figure 18 and Figure 19 As shown, the sleeve positioning part 106 is provided with threaded mounting holes 103 corresponding to the positioning rods 20. One end of the positioning rod 20 is threadedly connected to the threaded mounting hole 103, and the other end extends upward out of the threaded mounting hole 103 to facilitate positioning of the second iron core 3. The installation method of the positioning rod 20 is simple, and the disassembly and assembly are convenient and quick, simplifying the structure of the base 10 integrated with the sleeve positioning part 106 and reducing processing costs. As an alternative, the positioning rod 20 can also be integrally formed into the sleeve positioning part 106, or one end of the positioning rod 20 can be interference-fitted into the sleeve positioning part 106.

[0105] Fixing the positioning rod 20 to the sleeve positioning part 106 ensures that when the entire rotor structure is lifted after assembly, the positioning rod 20 remains on the sleeve positioning part 106 and is not lifted along with the rotor structure.

[0106] In some embodiments, such as Figure 8 and Figure 19 As shown, the outer peripheral wall of the balance ring 1 is provided with at least two assembly positioning grooves 16 arranged circumferentially. The assembly positioning grooves 16 are provided through the axial direction of the balance ring 1, and the positioning protrusions 102 are axially inserted into the assembly positioning grooves 16 to position the balance ring 1.

[0107] For example, there are two assembly positioning slots 16, which are arranged at 180°. The orthographic projection of the assembly positioning slot 16 on the horizontal plane is a semi-circular arc. The positioning protrusion 102 is a cylindrical rod, and the outer peripheral surface of the cylindrical rod can contact the hole wall surface of the assembly positioning slot 16.

[0108] As an alternative, the mounting positioning groove 16 can also be used to set the circular hole on the balance ring 1.

[0109] In some embodiments, such as Figure 16 As shown, the balance ring 1 is provided with a clearance through hole 15 that runs through its own axis, and the second iron core 3 is provided with a positioning through hole 32 that runs through its own thickness direction and is coaxially arranged in correspondence with the clearance through hole 15. The diameter of the clearance through hole 15 is larger than the maximum diameter of the positioning through hole 32.

[0110] When positioning the second iron core 3 using the positioning rod 20, since the lower balance ring 1 is installed before the second iron core 3, specifically, the balance ring 1 has already been positioned using the positioning protrusion 102 and the assembly positioning groove 16 when installing the second iron core 3. In order to avoid interference between the balance ring 1 and the positioning rod 20, an avoidance through hole 15 is provided on the balance ring 1, and the diameter of the avoidance through hole 15 is made larger than the maximum diameter of the positioning through hole 32, so that the positioning rod 20 passes through the avoidance through hole 15 and is inserted into the second iron core 3 to position the second iron core 3.

[0111] In some embodiments, such as Figure 15 and Figure 19 As shown, the bottom of the base 10 is provided with a plurality of supporting feet 104, which are arranged circumferentially around the mounting positioning hole 101 to form a clearance space. After the first iron core 2 is installed, the lower end of the drive shaft 7 passes through the mounting positioning hole 101 and is placed in the clearance space.

[0112] For example, there are three support feet 104, which are evenly distributed around the mounting and positioning holes 101.

[0113] In some embodiments, such as Figure 19 As shown, the sleeve positioning part 106 is provided with a mounting clearance hole 105. The mounting clearance hole 105 is provided through the sleeve positioning part 106 and the base 10 along the axial direction of the positioning rod 20. The mounting clearance hole 105 is used to avoid the pull rod 8 and the locking nut 9 and to form an operating space for tightening the locking nut 9. This design facilitates the assembly personnel to tighten the locking nut 9 in the mounting clearance hole 105.

[0114] For example, along the radial direction of the mounting positioning hole 101, the mounting clearance hole 105 is closer to the mounting positioning hole 101 than the support foot 104. In other words, the mounting clearance hole 105 is located inside the support foot 104. This arrangement provides a larger clearance space, allowing the user to insert the nut tightening tool into the clearance space before inserting it into the mounting clearance hole 105 to tighten the locking nut 9. This provides ample space and facilitates operation.

[0115] The following describes a preferred embodiment of the rotor structure assembly tooling used in assembling the rotor structure, specifically the assembly process:

[0116] S10. Install one of the balance rings 1 onto the base 10. The balance ring 1 is supported by the sleeve positioning part 106. The balance ring 1 is positioned by axially inserting the two positioning protrusions 102 and the two assembly positioning grooves 16 on the balance ring 1. The balance ring 1 passes through the positioning rod 20.

[0117] S20. Place the first iron core 2 on which the drive shaft 7 is installed above the balance ring 1, so that the output end of the drive shaft 7 faces upward and one end of the drive shaft 7 passes through the mounting positioning hole 101. Use the mounting positioning hole 101 to center and position the drive shaft 7. Use the first positioning part 1011 and the keyway 71 on the drive shaft 7 to axially insert and cooperate, so that the first through hole 12 and the second through hole 22 are coaxially aligned one-to-one.

[0118] S30. The positioning sleeve 30 is fitted onto the outside of the first iron core 2 with a clearance fit, and the positioning stop 302 at the lower end of the positioning sleeve and the positioning part 106 of the sleeve are axially inserted to position the positioning sleeve 30.

[0119] S40. Insert multiple second iron cores 3 one by one axially into each mounting slot 24 of the first iron core 2, so that the positioning rod 20 passes through the second iron core 3. Use the positioning rod 20 in conjunction with the positioning circumferential surface 303 of the positioning sleeve 30 to position the second iron core 3. Observe the installation status of the second iron core 3 through the assembly clearance hole 301.

[0120] S50. Install the pressure rod 5 so that the pressure rod 5 passes through the second iron core 3 and is axially inserted into the lower balance ring 1, so as to use the positioning rod 20 to position the second iron core 3 until the first pressing part 51 and the second pressing part 52 of the pressure rod 5 form a stepped limiting surface 53 that presses against the upper end surface of the lower balance ring 1.

[0121] S60. Insert the magnet 4 axially into the magnet slot 241;

[0122] S70. Place another balance ring 1 above the second iron core 3, and make the pressure rod 5 axially inserted into the upper balance ring 1.

[0123] S80. Pass the pull rod 8 through the upper balance ring 1, the first iron core 2, the lower balance ring 1 and the mounting clearance hole 105 in sequence, and connect a locking nut 9 to each of the two axial ends of the pull rod 8 so that the first iron core 2 is clamped between the two balance rings 1 along its own axis.

[0124] S90. The force-applying component 6 is threaded into the locking hole 14 through the assembly clearance hole 301, so that one end of the force-applying component 6 extends into the first guide hole 13 and presses against the first pressing part 51 of the pressure rod 5. The force-applying component 6 is screwed until the pressure rod 5 is pressed against the corresponding second iron core 3 in the direction close to the central axis of the first iron core 2, thus completing the assembly of the rotor structure. After that, the entire rotor structure can be hoisted to other processes for the next step of motor assembly.

[0125] The rotor structure assembly fixture provided in this embodiment of the present invention can achieve rapid assembly of the rotor structure without magnetic bridge when assembling the rotor structure, and has the advantage of high assembly efficiency; by positioning each part, it can not only prevent mistakes, but also improve the assembly accuracy; moreover, the rotor structure assembly fixture has the advantages of simple structure and low cost.

[0126] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotor structure assembly fixture, characterized in that, The rotor structure includes two balancing rings (1) spaced apart along the axial direction, a first iron core (2) fixed axially between the two balancing rings (1), a second iron core (3) spaced apart along the circumference of the first iron core (2) on the outer periphery of the first iron core (2), a magnet (4) disposed between the first iron core (2) and the second iron core (3), and a pressure rod (5) axially inserted into the first iron core (2) and at least one of the balancing rings (1). Each balancing ring (1) is provided with a force-applying member (6) corresponding to the pressure rod (5). The force-applying member (6) is connected to the balancing ring (1) located at the same axial end of the second iron core (3) and one end of the force-applying member (6) abuts against the corresponding pressure rod (5), so that the pressure rod (5) presses against the corresponding second iron core (3) in a direction close to the central axis of the first iron core (2). The rotor assembly fixture includes a base (10) with a mounting positioning hole (101), the inner wall of which is provided with a first positioning part (1011) for positioning the first iron core (2); one side of the base (10) is provided with: The positioning protrusion (102) is used for axial insertion with the balance ring (1); Positioning rod (20) is used for axial insertion with the second iron core (3); The positioning sleeve (30) is located inside the positioning rod (20), the mounting positioning hole (101) and the positioning protrusion (102). The positioning sleeve (30) is installed on the base (10). The positioning sleeve (30) has an assembly clearance hole (301) that penetrates the peripheral wall of the positioning sleeve (30) at one end near the base (10). The force-applying member (6) passes through the assembly clearance hole (301) and is connected to the balance ring (1). The inner peripheral wall of the positioning sleeve (30) forms a positioning peripheral surface (303) for positioning the second iron core (3).

2. The rotor structure assembly fixture according to claim 1, characterized in that, The assembly clearance holes (301) are provided in multiple ways, and the multiple assembly clearance holes (301) are arranged at intervals along the circumference of the positioning sleeve (30).

3. The rotor structure assembly fixture according to claim 1, characterized in that, The top surface of the base (10) and one of the positioning sleeves (30) are provided with a sleeve positioning part (106), and the other is provided with a positioning stop (302). The positioning stop (302) is axially inserted into the sleeve positioning part (106).

4. The rotor structure assembly fixture according to claim 3, characterized in that, The sleeve positioning part (106) is an annular boss protruding from the base (10). The positioning rod (20) and the positioning protrusion (102) are both installed on the sleeve positioning part (106). The mounting positioning hole (101) is provided on the sleeve positioning part (106) and is coaxially arranged with the sleeve positioning part (106).

5. The rotor structure assembly fixture according to claim 4, characterized in that, The sleeve positioning part (106) is provided with threaded mounting holes (103) corresponding to the positioning rod (20). One end of the positioning rod (20) is threaded to the threaded mounting hole (103), and the other end extends out of the threaded mounting hole (103).

6. The rotor structure assembly fixture according to claim 4, characterized in that, The bottom of the base (10) is provided with a plurality of support feet (104), and the plurality of support feet (104) are arranged circumferentially along the mounting positioning hole (101) to form a clearance space.

7. The rotor structure assembly fixture according to claim 6, characterized in that, The rotor structure also includes a pull rod (8) and a locking nut (9). The pull rod (8) passes through the first iron core (2) and its two ends pass through the two balance rings (1) respectively. The sleeve positioning part (106) is provided with an installation clearance hole (105). The installation clearance hole (105) is provided to pass through the sleeve positioning part (106) and the base (10) along the axial direction of the positioning rod (20). The installation clearance hole (105) is used to avoid the pull rod (8) and the locking nut (9) and to form an operating space for tightening the locking nut (9).

8. The rotor structure assembly fixture according to claim 7, characterized in that, Along the radial direction of the mounting positioning hole (101), the mounting clearance hole (105) is closer to the mounting positioning hole (101) than the support foot (104).

9. The rotor structure assembly fixture according to any one of claims 1 to 8, characterized in that, The inner diameter of the positioning sleeve (30) is greater than the outer diameter of the first iron core (2) and the outer diameter of the second iron core (3).

10. The rotor structure assembly fixture according to any one of claims 3 to 8, characterized in that, The maximum axial length of the positioning sleeve (30) is not greater than the sum of the axial length of the sleeve positioning part (106) and the maximum axial length of the first iron core (2).

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