Motor assembly press fitting device

Abstract

The utility model belongs to motor assembly technical field discloses a motor assembly press -fitting device for assembling main shaft rotor and fixed disc, and motor assembly press -fitting device includes base, connecting piece and guide piece, and the one end of first guide department is abutted to main shaft rotor, and the one end of fixed disc is placed in connecting piece, and this is initial state, through the pressure of the certain end of main shaft rotor along the first direction, the pressure is given first guide department through main shaft rotor, and whole guide piece moves towards base, until second guide department abuts on the surface of base, and this is final state, at this moment, the assembly of main shaft rotor and fixed disc is completed. The whole assembly process is simple to operate, and the assembly size deviation is stable, and it does not need to rely on the experience of manual work, and the whole device structure is simple, and the replacement of whole guide piece can be realized through the dismounting of base and connecting piece, and then the device can be adapted to different types of main shaft rotor, and the applicability and service life of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly technology, and in particular to a motor assembly press-fitting device. Background Technology

[0002] An electric motor is a power device composed of a main shaft rotor (including the shaft and rotor core, which are the core rotating components), a fixed disk (including end covers or a base, which serve to fix and guide), a stator, bearings, and other components. It generates a magnetic field through the stator, and the main shaft rotor rotates under the action of the magnetic field force, outputting mechanical energy through the main shaft. The fixed disk provides a stable mounting base for all components, collectively realizing the conversion of electrical energy into mechanical energy.

[0003] In existing technologies, the assembly of the spindle rotor and the fixed disk typically involves two steps: first, the bearing is press-fitted or heat-fitted onto the spindle rotor journal using an interference fit, ensuring a tight fit between the bearing inner ring and the shaft; then, the rotor with the bearing assembled is placed into the bearing housing of the fixed disk (such as an end cover), and the fixed disk is secured to the machine base with bolts. Coaxiality is then calibrated using tooling positioning or a laser alignment instrument to ensure rotor rotation accuracy. However, the assembly accuracy of this process is highly dependent on manual experience and tooling precision, and operational deviations can easily lead to out-of-tolerance coaxiality and uneven bearing clearance, resulting in vibration and abnormal noise during operation. Furthermore, traditional interference fit or bolted connections are difficult to disassemble, prone to component damage during maintenance, and the assembly equipment has a complex structure, increasing assembly time and resulting in low production efficiency.

[0004] Therefore, there is an urgent need to propose a motor assembly press-fitting device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a motor assembly press-fitting device that simplifies the device structure, eliminates the need for manual experience in assembling the main shaft rotor and the fixed plate, further reduces assembly time, and improves production efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A motor assembly press-fitting device for assembling a spindle rotor and a stationary disc, the motor assembly press-fitting device comprising:

[0008] The base is used to connect to the workbench;

[0009] A connector, one end of which is detachably connected to the surface of the base, has a through hole coaxial with the connector, and the through hole is a stepped hole, which includes a first hole section and a second hole section, the diameter of the first hole section being smaller than the diameter of the second hole section;

[0010] The guide member is capable of reciprocating along a first direction. The guide member includes a first guide portion and a second guide portion. The first guide portion is movably inserted through a first hole section, and the side surface of the second guide portion is slidably connected to the inner wall of the second hole section. The first direction is the axial direction of the connector.

[0011] Preferably, the motor assembly pressing device further includes a spring, a first groove is provided in the second guide portion, the opening direction of the first groove is towards the base along the first direction, at least part of the spring is located in the first groove, one end of the spring abuts against the bottom wall of the first groove, and the other end of the spring abuts against the surface of the base.

[0012] Preferably, a second groove is provided on the upper surface of the base, and the other end of the spring abuts against the bottom of the second groove.

[0013] Preferably, a positioning pin is connected to the main shaft rotor. Along the first direction, a third groove is provided at the end of the first guide part away from the base. The orthographic projection of the center of the third groove does not coincide with the orthographic projection of the center of the first guide part, and the positioning pin can be inserted into the third groove.

[0014] Preferably, a fourth groove is provided on the side surface of the second guide portion, the length of the fourth groove is equal to the length of the second guide portion, and the groove wall at the opening of the fourth groove is slidably connected to the hole wall of the second hole section.

[0015] Preferably, the diameter of the first guide portion is smaller than the diameter of the second guide portion, and the diameter of the second guide portion is larger than the inner diameter of the first hole segment.

[0016] Preferably, the total length of the first guide portion and the second guide portion is less than the length of the second hole segment, and the length of the first guide portion is greater than the length of the first hole segment.

[0017] Preferably, the motor assembly pressing device further includes a first bolt. Along the first direction, the end of the connector facing the base has a protrusion. The protrusion is distributed circumferentially along the connector. The protrusion has a first threaded hole. The first bolt passes through the first threaded hole and is threadedly connected to the base.

[0018] Preferably, the protrusions are connected end to end along the circumference of the connector, and the number of first threaded holes is at least two, with the at least two first threaded holes evenly distributed along the circumference of the connector.

[0019] Alternatively, the number of protrusions and the number of first threaded holes are both at least two and correspond one-to-one, with at least two protrusions evenly distributed along the circumference of the connector.

[0020] Preferably, the motor assembly pressing device also includes a second bolt, and the base is provided with a second threaded hole. The second bolt passes through the second threaded hole and is threadedly connected to the surface of the worktable.

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

[0022] This invention provides a motor assembly press-fitting device for assembling a spindle rotor and a fixed disc. The device includes a base, a connector, and a guide. The spindle rotor abuts against one end of a first guide, and the fixed disc is placed at one end of the connector; this is the initial state. At this point, the first guide protrudes from the first hole. By applying pressure along a first direction to one end of the spindle rotor, the pressure is transmitted through the spindle rotor to the first guide, causing the entire guide to move towards the base until the second guide abuts against the surface of the base; this is the final state. At this point, the assembly of the spindle rotor and the fixed disc is complete. The entire assembly process is simple to operate, with stable assembly dimensional deviations, requiring no reliance on manual experience. Furthermore, the entire device has a simple structure; the guide can be replaced simply by disassembling the base and connector, allowing the device to adapt to different types of spindle rotors, thus improving its applicability and service life. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view (initial state) of the motor assembly press-fitting device provided in this embodiment;

[0024] Figure 2 This is a cross-sectional view of the motor assembly press-fitting device provided in this embodiment (final state);

[0025] Figure 3 This is a cross-sectional view (initial state) of the motor assembly press-fitting device and the main shaft rotor assembly provided in this embodiment;

[0026] Figure 4 This is a schematic cross-sectional view of the motor assembly press-fitting device and the main shaft rotor assembly provided in this embodiment (final state);

[0027] Figure 5 This is a top view of the guide component provided in this embodiment;

[0028] Figure 6 yes Figure 5 A cross-sectional view along the AA direction;

[0029] Figure 7 This is a top view of the connector provided in this embodiment;

[0030] Figure 8 yes Figure 7 Cross-sectional view along the BB direction;

[0031] Figure 9 This is a top view of the base provided in this embodiment;

[0032] Figure 10 yes Figure 9 A cross-sectional view along the CC direction.

[0033] In the picture:

[0034] 100. Main spindle rotor; 101. Locating pin; 200. Fixed disc; 300. Base; 301. Second groove; 302. Second threaded hole; 400. Connecting piece; 410. Through hole; 411. First hole section; 412. Second hole section; 420. Protrusion; 421. First threaded hole; 500. Guide piece; 510. First guide part; 511. Third groove; 520. Second guide part; 521. First groove; 522. Fourth groove; 600. Elastic element. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] This embodiment provides a motor assembly press-fitting device, which simplifies the device structure, eliminates the need for manual experience in assembling the main shaft rotor and the fixed plate, further reduces assembly time, and improves production efficiency.

[0040] Specifically, such as Figures 1 to 4 As shown, a motor assembly press-fitting device is used to assemble a main shaft rotor 100 and a fixed plate 200. The device includes a base 300, a connector 400, and a guide 500. The base 300 is fixedly connected to an operating table. One end of the connector 400 is detachably connected to the surface of the base 300. The connector 400 has a through hole 410, which is coaxially arranged with the connector 400. The through hole 410 is a stepped hole, comprising a first section 411 and a second section 412, where the diameter of the first section 411 is smaller than the diameter of the second section 412. The guide 500 can move along a first direction (…). Figure 1 The guide 500 reciprocates in the X direction. The guide 500 includes a first guide portion 510 and a second guide portion 520. The first guide portion 510 is movably inserted through the first hole section 411. The side surface of the second guide portion 520 is slidably connected to the inner wall of the second hole section 412. The first direction is the axial direction of the connector 400.

[0041] The spindle rotor 100 abuts against one end of the first guide portion 510, and the fixed disk 200 is placed on one end of the connecting member 400. This is the initial state. At this time, the first guide portion 510 protrudes from the first hole section 411. By applying pressure along a first direction to one end of the spindle rotor 100, the pressure is transmitted through the spindle rotor 100 to the first guide portion 510, and the entire guide member 500 moves towards the base 300 until the second guide portion 520 abuts against the surface of the base 300. This is the final state, at which point the assembly of the spindle rotor 100 and the fixed disk 200 is completed. The entire assembly process is simple to operate, the assembly dimensional deviation is stable, it does not rely on manual experience, and the entire device has a simple structure. The entire guide member 500 can be replaced by disassembling the base 300 and the connecting member 400, thereby enabling the device to adapt to different types of spindle rotors 100, improving the applicability and service life of the device. It should be noted that the fixed disk 200 mentioned in this embodiment refers to the motor assembly including the end cover or base, which plays a fixed guiding role. In this embodiment, the base 300 is a plate-like structure; in other embodiments, the base 300 may be a cuboid or a frustum-shaped structure. In this embodiment, the guide 500 is a columnar structure; in other embodiments, the guide 500 may be a cuboid or a cone-shaped structure.

[0042] Furthermore, the surfaces of the base 300, connector 400, and guide 500 are all galvanized to form a dense zinc layer. This prevents the base metal from rusting by preferentially corroding itself through electrochemical protection, significantly improving the corrosion resistance of the base 300, connector 400, and guide 500, thereby extending the service life of the device.

[0043] Optionally, the motor assembly pressing device further includes an elastic element 600. A first groove 521 is provided within the second guide portion 520. The opening direction of the first groove 521 is along a first direction towards the base 300. At least a portion of the elastic element 600 is located within the first groove 521. One end of the elastic element 600 abuts against the bottom wall of the first groove 521, and the other end abuts against the surface of the base 300. When the pressure applied to the first guide portion 510 stops, the rebound force of the elastic element 600 pushes the second guide portion 520 back to the connection between the second hole segment 412 and the first hole segment 411, facilitating the next assembly. Furthermore, placing the elastic element 600 within the first groove 521 can limit the direction of the rebound force of the elastic element 600. In this embodiment, half of the elastic element 600 is disposed within the first groove 521. In other embodiments, the entire elastic element 600 may be disposed within the first groove 521, or one-third of the elastic element 600 may be disposed within the first groove 521. In this embodiment, the elastic element 600 is a spring; in other embodiments, the elastic element 600 may also be a rubber ball.

[0044] Furthermore, a second groove 301 is provided on the upper surface of the base 300, and the other end of the elastic member 600 abuts against the bottom of the second groove 301. The second groove 301 further restricts the sliding of the other end of the elastic member 600 on the base 300, thereby limiting the shaking of the elastic member 600 and making the rebound of the elastic member 600 more reliable.

[0045] Optionally, such as Figures 5 to 6 As shown, a positioning pin 101 is connected to the spindle rotor 100. Along the first direction, a third groove 511 is formed at the end of the first guide portion 510 opposite to the base 300. The orthographic projection of the center of the third groove 511 does not coincide with the orthographic projection of the center of the first guide portion 510. The positioning pin 101 can be inserted into the third groove 511 to position the spindle rotor 100, thereby improving the assembly accuracy of the spindle rotor 100 and the fixed disk 200. It should be noted that the eccentricity of the third groove 511 can be changed according to the specific position of the positioning pin 101. By setting the third groove 511 with different eccentricities, different types of spindle rotors 100 can be adapted.

[0046] Furthermore, a fourth groove 522 is formed on the side surface of the second guide portion 520. The length of the fourth groove 522 is equal to the length of the second guide portion 520. The groove wall at the opening of the fourth groove 522 is slidably connected to the hole wall of the second hole section 412 to prevent oil stains on the surface of the second guide portion 520 from forming an oil film and creating a vacuum with the hole wall of the second hole section 412, which would prevent subsequent rebound or insufficient rebound force and affect the next assembly of the main shaft rotor 100 and the fixed plate 200. In this embodiment, the fourth groove 522 is a semi-circular groove. In other embodiments, the fourth groove 522 can also be a dovetail groove or a square groove, etc.

[0047] Optionally, the diameter of the first guide portion 510 is smaller than the diameter of the second guide portion 520, and the diameter of the second guide portion 520 is larger than the inner diameter of the first hole segment 411. The side of the second guide portion 520 facing the first guide portion 510 abuts against the connection between the first hole segment 411 and the second hole segment 412, thereby limiting the sliding length of the second guide portion 520 and preventing the second guide portion 520 from being ejected from the first hole segment 411 under the action of the elastic force of the elastic member 600.

[0048] Furthermore, the total length of the first guide portion 510 and the second guide portion 520 is less than the length of the second hole section 412. That is, when one end of the second guide portion 520 abuts against the surface of the base 300, the first guide portion 510 is entirely located within the second hole section 412. There is a step difference between the end of the first guide portion 510 away from the base 300 and the upper surface of the connector 400. The step difference is the dimension by which the spindle rotor 100 is pressed into the fixed disk 200. Thus, the existence of the step difference ensures that the spindle rotor 100 is pressed into the fixed disk 200, thereby realizing the assembly of the spindle rotor 100 and the fixed disk 200. In addition, the length of the first guide portion 510 is greater than the length of the first hole section 411, so that when the first guide portion 510 is not subjected to external force, the first guide portion 510 extends out of the first hole section 411 of the connector 400 through the elastic member 600, so as to facilitate the assembly of the first guide portion 510 and the spindle rotor 100.

[0049] Optionally, such as Figures 7 to 8 As shown, the motor assembly pressing device also includes a first bolt. Along the first direction, the end of the connector 400 facing the base 300 is provided with a protrusion 420. The protrusion 420 is distributed circumferentially along the connector 400. The protrusion 420 is provided with a first threaded hole 421. The first bolt passes through the first threaded hole 421 and is threadedly connected to the base 300, so as to realize the detachable connection between the connector 400 and the base 300, thereby facilitating the replacement of the connector 400 and the guide 500.

[0050] Furthermore, the protrusions 420 are connected end-to-end along the circumference of the connector 400, and the number of first threaded holes 421 is at least two. These at least two first threaded holes 421 are evenly distributed along the circumference of the connector 400, improving the stability of the connection between the connector 400 and the base 300, thereby improving the assembly accuracy of the spindle rotor 100 and the fixed disk 200. In other embodiments, the number of protrusions 420 and the number of first threaded holes 421 are both at least two and correspond one-to-one, with the at least two protrusions 420 evenly distributed along the circumference of the connector 400. In this embodiment, the number of first threaded holes 421 is four; in other embodiments, the number of first threaded holes 421 can be two, three, or five, etc.

[0051] Optionally, such as Figures 9 to 10 As shown, the motor assembly pressing device also includes a second bolt. The base 300 is provided with a second threaded hole 302. The second bolt passes through the second threaded hole 302 and is threaded to the surface of the worktable to fix the base 300, thereby avoiding the reduction of the assembly accuracy of the spindle rotor 100 and the fixed plate 200 due to the sliding of the base 300 during operation.

[0052] Furthermore, the number of second threaded holes 302 is at least two, and the at least two second threaded holes 302 are evenly distributed along the circumference of the base 300 to improve the stability of the connection between the base 300 and the worktable. In this embodiment, the number of second threaded holes 302 is four; in other embodiments, the number of second threaded holes 302 may be two, three, or five, etc.

[0053] The operation steps and principle of the motor assembly press-fitting device provided in this embodiment are as follows:

[0054] S1. Place the fixed plate 200 above the first guide part 510. At this time, the connector 400 is in contact with the fixed plate 200. The connector 400 serves as the axial force bearing and the initial positioning of the fixed plate 200.

[0055] S2. Since the guide member 500 is not subjected to external pressure, the first guide part 510 extends out of the bearing hole of the fixed disk 200 by the elastic force of the elastic member 600, and the main spindle rotor 100 is placed in the first guide part 510. By placing the positioning pin 101 in the first groove 521, the main spindle rotor 100 is positioned and the main spindle rotor 100 is aligned with the fixed disk 200.

[0056] S3. Apply pressure along the first direction toward the base 300 to the end of the main spindle rotor 100. The pressure is transmitted through the main spindle rotor 100 to the first guide part 510 and then to the elastic member 600. The elastic member 600 is compressed and deformed. As the pressure increases, the second guide part 520 gradually slides toward the base 300 until it contacts the base 300, thus completing the press-fitting of the main spindle rotor 100 and the fixed plate 200.

[0057] 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 motor assembly press-fitting device, characterized in that, The motor assembly pressing device is used to assemble the main shaft rotor (100) and the fixed plate (200), and the motor assembly pressing device includes: A base (300) for connecting to a worktable; A connector (400) is provided, one end of which is detachably connected to the surface of the base (300). The connector (400) is provided with a through hole (410), which is coaxially arranged with the connector (400). The through hole (410) is a stepped hole, which includes a first hole section (411) and a second hole section (412). The diameter of the first hole section (411) is smaller than the diameter of the second hole section (412). The guide (500) is capable of reciprocating along a first direction. The guide (500) includes a first guide portion (510) and a second guide portion (520). The first guide portion (510) is movably inserted through the first hole section (411). The side surface of the second guide portion (520) is slidably connected to the inner wall of the second hole section (412). The first direction is the axial direction of the connector (400).

2. The motor assembly pressing device according to claim 1, characterized in that, The motor assembly pressing device further includes an elastic element (600), and the second guide portion (520) is provided with a first groove (521). The opening direction of the first groove (521) is along the first direction toward the base (300). At least a portion of the elastic element (600) is located in the first groove (521). One end of the elastic element (600) abuts against the bottom wall of the first groove (521), and the other end of the elastic element (600) abuts against the surface of the base (300).

3. The motor assembly press-fitting device according to claim 2, characterized in that, The upper surface of the base (300) is provided with a second groove (301), and the other end of the elastic member (600) abuts against the bottom of the second groove (301).

4. The motor assembly press-fitting device according to claim 1, characterized in that, The main shaft rotor (100) is connected to a positioning pin (101). Along the first direction, the first guide part (510) is provided with a third groove (511) at one end away from the base (300). The orthographic projection of the center of the third groove (511) does not coincide with the orthographic projection of the center of the first guide part (510). The positioning pin (101) can be inserted into the third groove (511).

5. The motor assembly press-fitting device according to claim 1, characterized in that, The second guide portion (520) has a fourth groove (522) on its side surface. The length of the fourth groove (522) is equal to the length of the second guide portion (520). The groove wall at the opening of the fourth groove (522) is slidably connected to the hole wall of the second hole section (412).

6. The motor assembly press-fitting device according to claim 1, characterized in that, The diameter of the first guide portion (510) is smaller than the diameter of the second guide portion (520), and the diameter of the second guide portion (520) is larger than the inner diameter of the first hole segment (411).

7. The motor assembly press-fitting device according to claim 6, characterized in that, The total length of the first guide portion (510) and the second guide portion (520) is less than the length of the second hole segment (412), and the length of the first guide portion (510) is greater than the length of the first hole segment (411).

8. The motor assembly press-fitting device according to claim 1, characterized in that, The motor assembly pressing device further includes a first bolt. Along the first direction, the connector (400) has a protrusion (420) at one end facing the base (300). The protrusion (420) is distributed circumferentially along the connector (400). The protrusion (420) has a first threaded hole (421). The first bolt passes through the first threaded hole (421) and is threadedly connected to the base (300).

9. The motor assembly press-fitting device according to claim 8, characterized in that, The protrusions (420) are connected end to end along the circumference of the connector (400), and the number of the first threaded holes (421) is at least two, and the at least two first threaded holes (421) are evenly distributed along the circumference of the connector (400). Alternatively, the number of protrusions (420) and the number of the first threaded holes (421) are both at least two and correspond one-to-one, and at least two of the protrusions (420) are evenly distributed along the circumference of the connector (400).

10. The motor assembly press-fitting device according to any one of claims 1-9, characterized in that, The motor assembly pressing device also includes a second bolt. The base (300) is provided with a second threaded hole (302). The second bolt passes through the second threaded hole (302) and is threadedly connected to the surface of the worktable.

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