Motor bearing dismounting device and dismounting method thereof

Abstract

The application discloses a motor bearing dismounting device and a dismounting method thereof and belongs to the technical field of bearing dismounting. The motor bearing dismounting device and the dismounting method thereof are a motor bearing dismounting device used for dismounting bearings matched with motor shafts, which comprises a main body part, a top joint part and a clamping part. The main body part is provided with a first avoiding space used for accommodating bearings and motor shafts. The top joint part is threadedly connected with the top end of the main body part, one end of the top joint part is arranged in the first avoiding space and the top joint part is used for abutting against the motor shaft. The clamping part is movably connected with the bottom end of the main body part and is used for being clamped on one side of the bearing away from the top joint part. The application applies accurate axial thrust force to the end face of the motor shaft by the top joint part, realizes a smooth and lossless dismounting process and makes the whole operation more convenient.

Description

Technical Field

[0001] This application belongs to the field of bearing disassembly technology, and in particular relates to a motor bearing disassembly device and disassembly method. Background Technology

[0002] Permanent magnet synchronous motors are widely used in new energy vehicles, industrial servo drives, and other fields due to their high efficiency and high power density. However, bearing disassembly is a critical and difficult step in the manufacturing, repair, and remanufacturing of these motors.

[0003] Permanent magnet synchronous motors are compact in design, and the axial clearance between the bearing inner ring and the rotor shaft shoulder, or between the bearing end face and the rotor core, is usually very narrow. Currently, the most commonly used bearing removal tool is the traditional puller (commonly known as a puller). During use, the puller's claws need to extend behind the bearing to hook it, but due to the aforementioned narrow clearance, existing pullers have the following technical problems: First, the puller's claws themselves have a certain thickness, making it difficult to effectively extend into the tiny gap between the bearing and adjacent components, resulting in an inability to reliably hold the bearing inner ring; second, adjusting the puller's claw extension angle is inconvenient, making it difficult to simultaneously achieve stable hooking of the bearing and centering pressure on the motor shaft within a limited space.

[0004] Therefore, there is an urgent need for a bearing disassembly device that can adapt to narrow disassembly spaces and is easy to operate. Summary of the Invention

[0005] This application aims to at least solve the technical problems existing in the prior art, such as the inconvenience of disassembling bearings in narrow disassembly spaces and poor operation.

[0006] In a first aspect, this application provides a motor bearing disassembly device and a disassembly method thereof, including: The main body is provided with a first clearance space, which is used to accommodate the bearing and the motor shaft. A top connection portion is threadedly connected to the top end of the main body portion, and one end of the top connection portion is located in the first clearance space and is used to abut against the motor shaft; A snap-fit ​​part is movably connected to the bottom end of the main body and is used to snap onto the side of the bearing opposite to the top part.

[0007] According to one embodiment of this application, the latching portion includes two chucks; A motor shaft passes through the two chucks, the distance between the two chucks is adjustable, and the chucks are located on the side of the bearing away from the top joint.

[0008] According to one embodiment of this application, each of the chucks includes an abutment surface and a bearing surface on opposite sides, the abutment surface and the bearing surface being disposed adjacent to each other, and the abutment surface being used to abut against the side of the bearing, and the bearing surface being used to abut against the bottom surface of the bearing.

[0009] According to one embodiment of this application, the bottom end of the main body is fixedly connected to two fixing brackets; The two fixing frames are arranged in parallel and spaced apart. Each chuck is slidably connected to the two fixing frames. The two fixing frames and the two chucks enclose a second clearance space, which is connected to the first clearance space.

[0010] According to one embodiment of this application, each of the fixing frames is provided with an oblong hole, and each of the chucks is provided with a fastener, the fastener passing through the oblong hole and adapted to fasten the chuck to the fixing frame.

[0011] According to one embodiment of this application, the fixing frame is provided with a scale, and the chuck is slidably disposed along the extension direction of the scale.

[0012] According to one embodiment of this application, the top contact portion is provided with a top point at one end near the snap-fit ​​portion, the top point being used to abut against the center of the motor shaft; and / or, the top contact portion is provided with a rotating handle or a hexagonal drive head at one end away from the snap-fit ​​portion.

[0013] According to one embodiment of this application, the main body includes a connecting rod and two parallel support rods. The connecting rod is detachably connected between the two support rods and forms a first clearance space with the two support rods. The top connection is threadedly connected to the connecting rod. The end of the support rod opposite to the connecting rod is connected to the snap-fit ​​part.

[0014] According to one embodiment of this application, the main body, the top connector, and the snap-fit ​​connector are all made of non-ferromagnetic material.

[0015] Secondly, this application provides a disassembly method for the aforementioned motor bearing disassembly device, including: With the bearing and motor shaft in the first clearance space, one end of the top joint abuts against the motor shaft; The snap-fit ​​portion is positioned on the side of the bearing opposite to the top contact portion; The rotating top part drives the main body and the snap-fit ​​part to move along the motor shaft.

[0016] In summary, this application includes at least one of the following beneficial technical effects: The motor bearing disassembly device of this application effectively overcomes the space constraint problem in the disassembly process of permanent magnet synchronous motor bearings through the coordinated operation of the main body, the top connection part, and the snap-fit ​​part. This device abandons the traditional puller method that relies on claws extending into tiny gaps for clamping, instead using the snap-fit ​​part to provide stable support on the side of the bearing facing away from the top connection part, while the top connection part applies a precise axial pushing force to the end face of the motor shaft, achieving a smooth and damage-free disassembly process, making the overall operation more convenient.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is one of the structural schematic diagrams of the motor bearing disassembly device and disassembly method provided in the embodiments of this application; Figure 2 This is the second schematic diagram of the structure of the motor bearing disassembly device and disassembly method provided in the embodiments of this application; Figure 3 This is the third structural schematic diagram of the motor bearing disassembly device and disassembly method provided in the embodiments of this application.

[0019] Figure label: 10. Main body; 11. First clearance space; 12. Connecting rod; 13. Support rod; 20. Top joint; 30. Connecting part; 31. Chuck; 32. Mounting bracket; 321. Waist-shaped hole; 33. Fastener; 34. Second clearance space. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] Permanent magnet synchronous motors (PMSMs) occupy an important position in modern engineering applications such as new energy vehicle drive systems and industrial servo control due to their high efficiency and high power density. However, the bearing disassembly process always faces severe challenges in the manufacturing, on-site maintenance, and remanufacturing of these motors. Because of the highly compact design of PMSMs, the axial assembly clearance between the bearing inner ring and the rotor shoulder, or between the bearing end face and the rotor core end face, is often extremely small. This narrow space makes it difficult to use conventional disassembly tools.

[0022] Currently, the traditional puller commonly used in the industry requires the claw to be inserted from the side behind the bearing to grip and fix it. However, due to the aforementioned clearance conditions, this tool has significant defects: the puller claw itself has a considerable physical thickness, making it impossible to smoothly embed into the limited gap between the bearing and the adjacent fixed parts, resulting in an inability to form a reliable locking fixation; at the same time, the radial extension angle adjustment mechanism of the claw operates rigidly in space-constrained environments, making it difficult to simultaneously ensure stable gripping of the bearing and precise axial alignment of the motor shaft; more seriously, when the operator forcibly uses the puller when the clearance is insufficient, it is very easy to cause irreversible deformation of the bearing cage, scratches on the rolling element raceway surface, or even direct damage to the precision journal area of ​​the motor shaft.

[0023] The following is for reference. Figures 1-3 This application describes a motor bearing disassembly device and a disassembly method according to embodiments of the present application.

[0024] like Figure 1 and Figure 2 As shown, the motor bearing disassembly device includes: a main body 10, a top connection 20, and a snap-fit ​​connection 30.

[0025] The main body 10 is provided with a first clearance space 11, which is used to accommodate the bearing and the motor shaft; The top connection 20 is threaded to the top end of the main body 10, and one end of the top connection 20 is provided in the first clearance space 11 and is used to abut against the motor shaft. The snap-fit ​​part 30 is movably connected to the bottom end of the main body part 10, and the snap-fit ​​part 30 is used to snap onto the side of the bearing opposite to the top connection part 20.

[0026] The operating steps are as follows: Insert the main body 10 onto the motor shaft, so that the motor shaft and bearing enter the first clearance space 11. At this time, the locking part 30 is in the adjustment state.

[0027] Move the locking part 30 so that it is locked on the side of the bearing away from the top locking part 20 (i.e., the lower end face of the bearing).

[0028] When the top joint 20 is tightened, the bottom end of the top joint 20 presses against the center of the end face of the motor shaft, applying a downward pushing force to the motor shaft. Since the top joint 20 has firmly abutted against the motor shaft, restricting its downward displacement, continuous rotation of the top joint 20 will cause the main body 10 together with the snap-fit ​​part 30 to generate an upward axial displacement relative to the top joint 20, thereby driving the bearing to move upward relative to the motor shaft until it is completely disengaged.

[0029] The motor bearing disassembly device of this application effectively overcomes the space constraint problem in the disassembly process of permanent magnet synchronous motor bearings through the coordinated cooperation of the main body 10, the top connection part 20, and the snap-fit ​​part 30. This device abandons the traditional clamping method of pullers that rely on the claws to insert into tiny gaps. Instead, the snap-fit ​​part 30 provides stable support on the side of the bearing facing away from the top connection part 20, while the top connection part 20 applies a precise axial pushing force to the end face of the motor shaft, realizing a smooth and damage-free disassembly process and making the overall operation more convenient.

[0030] In some embodiments, the latching portion 30 includes two chucks 31; A motor shaft passes through the two chucks 31, the distance between the two chucks 31 is adjustable, and the chucks 31 are located on the side of the bearing away from the top connection part 20.

[0031] Specifically, the locking part 30 may consist of two chucks 31. These two chucks 31 may have a symmetrical or nearly symmetrical structure, designed to lock the bearing in place from both sides. Each chuck 31 may be a plate-like or block-like component with a certain thickness and strength. By designing the locking part 30 as two chucks 31, the necessary space for the motor shaft to pass through can be provided, avoiding interference between the motor shaft and the locking part 30 during disassembly.

[0032] Through the above technical solution, the locking part 30 is designed as two adjustable-distance chucks 31, providing space for the motor shaft to pass through, effectively solving the limitations of the traditional one-piece locking part 30 in adapting to different sized bearings and motor shaft passage scenarios. This design makes the disassembly device more versatile and adaptable, capable of flexibly handling the disassembly needs of various bearing specifications. At the same time, the synergistic effect of the two chucks 31 can provide more uniform and stable support for the bearing, avoiding the instability of bearing disassembly that may be caused by single-point force, thereby improving the efficiency and safety of the disassembly operation.

[0033] In actual implementation, each of the chucks 31 has an abutment surface and a bearing surface on its opposite side. The abutment surface and the bearing surface are arranged adjacent to each other and form a stepped configuration. The abutment surface is used to abut against the side of the bearing, and the bearing surface is used to abut against the bottom surface of the bearing.

[0034] Specifically, the abutment surface refers to the surface on the chuck 31 used to contact the side of the bearing and apply lateral support or positioning force. Its main function is to restrict the radial movement of the bearing and prevent the bearing from tilting or deviating from the center during disassembly. This abutment surface can be designed to be flat, curved, or have a specific shape to better fit the side of the bearing's outer ring, providing stable support by maintaining close contact with the side of the bearing during disassembly. The bearing bearing surface refers to the surface on the chuck 31 used to contact the bottom surface of the bearing. Its main function is to provide a stable support point so that the bearing can be pushed off the motor shaft when the top joint 20 applies pressure to the motor shaft.

[0035] like Figure 3 As shown, in some embodiments, the bottom end of the main body 10 is fixedly connected to two fixing brackets 32; The two fixing frames 32 are arranged in parallel and spaced apart. Each chuck 31 is slidably connected to the two fixing frames 32. The two fixing frames 32 and the two chucks 31 enclose a second clearance space 34, which is connected to the first clearance space 11.

[0036] The second clearance space 34 is an area that provides a passageway for the motor shaft. Its size and shape should be designed to ensure that the motor shaft can pass freely during disassembly without interfering with the mounting bracket 32 ​​or the chuck 31.

[0037] Through the above technical solution, a fixing frame 32 is set at the bottom of the main body 10 and the chuck 31 is slidably connected to it, providing stable guidance and support for the movement of the chuck 31. This structure effectively solves the problem of wobbling or inaccurate positioning that may occur when the chuck 31 is adjusted, ensuring that the chuck 31 can slide smoothly and accurately, thereby adapting to bearings of different sizes. At the same time, the second clearance space 34 formed by the fixing frame 32 and the chuck 31 is connected to the first clearance space 11, ensuring that the motor shaft can pass smoothly during disassembly, avoiding interference, and improving the versatility and ease of operation of the device.

[0038] In actual implementation, each of the mounting brackets 32 is provided with an oblong hole 321, and each of the chucks 31 is provided with a fastener 33. The fastener 33 passes through the oblong hole 321 and is adapted to fasten the chuck 31 to the mounting bracket 32. The fastener 33 can be a bolt; the fastener 33, through its own fastening action, generates sufficient mechanical locking force between the chuck 31 and the mounting bracket 32, thereby firmly fixing the chuck 31 in the selected position. This fastening function ensures that the chuck 31 will not move accidentally during disassembly, maintaining stable clamping of the bearing.

[0039] More specifically, the fastener 33 can be an anti-loosening locking bolt. The threaded section of the anti-loosening locking bolt passes through the oblong hole 321 on the fixing frame 32 and is screwed into the corresponding threaded hole on the chuck 31. When the anti-loosening locking bolt is loosened, the chuck 31 can slide freely along the extension direction of the oblong hole 321 to adjust the distance between the two chucks 31; when the chuck 31 is adjusted to the working position so that its bearing surface is in close contact with the lower end face of the inner ring of the bearing, tightening the anti-loosening locking bolt will press and fix the chuck 31 onto the fixing frame 32, thus achieving reliable locking between the chuck 31 and the fixing frame 32.

[0040] To achieve the anti-loosening effect, the anti-loosening locking bolt may adopt at least one of the following structural forms: In an optional embodiment, a spring washer or a toothed anti-loosening washer is provided between the head of the anti-loosening locking bolt and the upper surface of the fixing bracket 32. When the anti-loosening locking bolt is tightened, the elastic restoring force of the spring washer or the meshing teeth of the toothed washer can effectively prevent the anti-loosening locking bolt from loosening on its own under vibration conditions, thereby maintaining the locked state of the chuck 31.

[0041] In another alternative embodiment, the anti-loosening locking bolt is made entirely of a non-ferromagnetic material. For example, bolts made of austenitic stainless steel (such as 304 or 316L stainless steel) are selected. This material will not be magnetized or attracted in a strong magnetic field environment, eliminating the potential for abnormal bolt stress caused by the attraction of the rotor permanent magnet, and further ensuring the positional stability of the chuck 31 during disassembly.

[0042] In actual operation, the fixing frame 32 is provided with a scale, and the chuck 31 is slidably disposed along the extension direction of the scale.

[0043] By using the above technical solution, a scale is set on the fixed frame 32, and the chuck 31 slides along the extension direction of the scale. The operator can intuitively and accurately adjust the distance between the two chucks 31. This allows the chuck 31 to be quickly positioned to the preset or required clamping position, ensuring adaptability to bearings of different sizes.

[0044] In actual implementation, the top part 20 is provided with a top point at one end near the snap-fit ​​part 30, and the top point is used to abut against the center of the motor shaft; and / or, the top part 20 is provided with a rotating handle or a hexagonal drive head at one end away from the snap-fit ​​part 30.

[0045] In actual implementation, the main body 10 includes a connecting rod 12 and two parallel support rods 13. The connecting rod 12 is detachably connected between the two support rods 13 and forms a first clearance space 11 with the two support rods 13. The top connection 20 is threadedly connected to the connecting rod 12. The end of the support rod 13 facing away from the connecting rod 12 is connected to the snap-fit ​​part 30.

[0046] In actual implementation, the main body 10, the top connecting part 20, and the snap-fit ​​part 30 are all made of non-ferromagnetic materials.

[0047] Specifically, non-ferromagnetic materials refer to those materials that do not possess ferromagnetism, meaning they cannot be attracted by magnets or exhibit strong magnetization in a magnetic field. These materials include paramagnetic and diamagnetic materials. Using non-ferromagnetic materials to manufacture the main body 10, the top connector 20, and the snap-fit ​​connector 30 aims to eliminate or significantly reduce the magnetic response of these critical components in a magnetic field environment. In practical implementation, various non-ferromagnetic materials can be selected according to specific needs. For example, for the main body 10 and the top connector 20, which need to withstand significant mechanical stress, austenitic stainless steel (such as 304 or 316L) or high-strength aluminum alloys can be selected. These materials not only have good mechanical strength and corrosion resistance but are also non-ferromagnetic. For the snap-fit ​​connector 30, provided sufficient strength is ensured, copper alloys (such as brass or bronze) or certain high-performance engineering plastics can also be considered, as they also possess non-magnetic properties.

[0048] Through the above technical solution, the main body 10, top connection 20, and snap-fit ​​30 of the motor bearing disassembly device are all made of non-ferromagnetic materials, effectively avoiding the influence of the motor's magnetism on the device components during disassembly. Specifically, the use of non-ferromagnetic materials ensures that the disassembly device will not be magnetized or attracted in a magnetic field environment, thereby guaranteeing the smoothness of the disassembly operation, the accuracy of positioning, and the stable transmission of disassembly force.

[0049] This application also proposes a disassembly method for a motor bearing disassembly device, characterized by comprising: With the bearing and motor shaft in the first clearance space 11, one end of the top connection 20 abuts against the motor shaft; The snap-fit ​​portion 30 is positioned on the side of the bearing opposite to the top contact portion 20; Rotating the top contact part 20 causes the main body part 10 and the snap-fit ​​part 30 to move along the motor shaft.

[0050] In this embodiment, the motor bearing and motor shaft are placed together into the first clearance space 11 of the main body 10. Next, one end of the top contact 20 is precisely abutted against the center of the motor shaft end, while the position of the locking part 30 is adjusted so that it is securely locked onto the end face of the bearing opposite to the top contact 20. Based on this, when the top contact 20 is rotated, utilizing the characteristics of threaded transmission, the bottom end of the top contact 20 applies a downward pushing force to the end face of the motor shaft. Since the motor shaft is blocked by the top contact 20 and cannot move downwards, continuous rotation of the top contact 20 will drive the main body 10 and the locking part 30 to generate an upward axial displacement relative to the top contact 20, thereby causing the bearing to move upwards relative to the motor shaft until disengagement is complete.

[0051] The core innovation of this embodiment lies in the fact that, through the coordinated cooperation of the top contact portion 20 and the locking portion 30, a stable pull-out of the bearing can be achieved within a narrow space without the need for tools. This solution effectively avoids deformation of the bearing cage, damage to the raceway, and scratches on the motor shaft journal. Compared to traditional disassembly methods, this technical solution abandons the operation mode of relying on claws to insert into tiny gaps, and instead utilizes the overall accommodating characteristics of the first clearance space 11, allowing the top contact portion 20 to directly act on the end of the motor shaft, while the locking portion 30 provides a pull-out force fulcrum from the back side of the bearing.

[0052] It should also be noted that permanent magnet synchronous motors have embedded permanent magnets inside the rotor, creating a strong magnetic field. Iron tools used in traditional manual striking methods are easily attracted to the rotor, leading to inaccurate force application, difficulty in controlling the force, and the risk of the tool rebounding and injuring people or scratching the rotor surface.

[0053] This device employs a pure threaded force application method, completely eliminating the need for hammering and impact. Operators can generate a smooth and gradual disassembly force by rotating the top contact part 20, eliminating the need for easily attracted tools such as iron hammers. Throughout the disassembly process, there is no relative impact movement between the device and the rotor, fundamentally avoiding problems such as uncontrolled force application, tool rebound, or surface scratches caused by tools being attracted by the magnetic field. Furthermore, the main body 10, top contact part 20, and snap-fit ​​part 30 can all be made of non-ferromagnetic materials (such as austenitic stainless steel, aluminum alloy, or copper alloy) to further reduce magnetic field interference and ensure operational safety and maintain motor performance.

[0054] Meanwhile, permanent magnet synchronous motors have a compact design with extremely small gaps between the bearing inner ring and the rotor shaft shoulder, or between the bearing end face and the rotor core. Traditional pullers have thick claws (usually over 5mm) and difficult-to-adjust the unfolding angle, making it impossible for them to reach into this narrow gap and effectively hook the bearing inner ring.

[0055] First, the snap-fit ​​part 30 is movably connected to the bottom end of the main body 10. Its structure can be designed to be thin (thickness controllable to 1-2 mm), allowing it to easily reach into micro-gap that traditional pullers cannot access. Second, the snap-fit ​​part 30 allows for flexible adjustment of its angle and radial position within confined spaces, thereby accurately snapping into the bearing end face. Therefore, this device significantly reduces the requirements for disassembly clearance and is suitable for compact permanent magnet synchronous motors that are difficult to operate with existing tools.

[0056] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0057] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0058] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0059] In the description of this application, "multiple" means two or more.

[0060] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0061] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A motor bearing disassembly device, used for disassembling a bearing that mates with a motor shaft, characterized in that, include: The main body is provided with a first clearance space, which is used to accommodate the bearing and the motor shaft. A top connection portion is threadedly connected to the top end of the main body portion, and one end of the top connection portion is located in the first clearance space and is used to abut against the motor shaft; A snap-fit ​​part is movably connected to the bottom end of the main body and is used to snap onto the side of the bearing opposite to the top part.

2. The motor bearing disassembly device according to claim 1, characterized in that, The locking part includes two chucks; A motor shaft passes through the two chucks, the distance between the two chucks is adjustable, and the chucks are located on the side of the bearing away from the top joint.

3. The motor bearing disassembly device according to claim 2, characterized in that, Each of the chucks has an opposing side including an abutment surface and a bearing surface, the abutment surface being disposed adjacent to the bearing surface, the abutment surface being used to abut against the side of the bearing, and the bearing surface being used to abut against the bottom surface of the bearing.

4. The motor bearing disassembly device according to claim 2, characterized in that, Two fixing brackets are fixedly connected to the bottom end of the main body; The two fixing frames are arranged in parallel and spaced apart. Each chuck is slidably connected to the two fixing frames. The two fixing frames and the two chucks enclose a second clearance space, which is connected to the first clearance space.

5. The motor bearing disassembly device according to claim 4, characterized in that, Each of the mounting brackets is provided with an oblong hole, and each of the chucks is provided with a fastener, which passes through the oblong hole and is adapted to fasten the chuck to the mounting bracket.

6. The motor bearing disassembly device according to claim 4, characterized in that, The mounting bracket is provided with a scale, and the chuck is slidably disposed along the extension direction of the scale.

7. The motor bearing disassembly device according to claim 1, characterized in that, The top part is provided with a tip at one end near the snap-fit ​​part, and the tip is used to abut against the center of the motor shaft; and / or, the top part is provided with a rotating handle or a hexagonal drive head at one end away from the snap-fit ​​part.

8. The motor bearing disassembly device according to claim 1, characterized in that, The main body includes a connecting rod and two parallel support rods. The connecting rod is detachably connected between the two support rods and forms a first clearance space with the two support rods. The top connection is threaded to the connecting rod. The end of the support rod opposite to the connecting rod is connected to the snap-fit ​​part.

9. The motor bearing disassembly device according to claim 1, characterized in that, The main body, top connector, and snap-fit ​​connector are all made of non-ferromagnetic materials.

10. A method for disassembling a motor bearing disassembly device as described in any one of claims 1-9, characterized in that, include: With the bearing and motor shaft in the first clearance space, one end of the top joint abuts against the motor shaft; The snap-fit ​​portion is positioned on the side of the bearing opposite to the top contact portion; The rotating top part drives the main body and the snap-fit ​​part to move along the motor shaft.

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