A driving motor rotor dismounting tool and a method thereof

Abstract

The application discloses a kind of driving motor rotary variable rotor lossless dismounting tool and its using method, tool includes positioning component, one end of its one side wall is opened with the slot for accommodating rotary variable rotor, middle part is opened with the positioning part that is cooperated with the rotating shaft of driving motor to pre-position rotating shaft;Locking assembly is movably arranged in the other end of positioning component along axial direction, it is suitable to be tightly pressed on the first end of rotary variable rotor placed in slot when extending towards slot;Movable stopper is detachably installed at slot, when rotary variable rotor is placed in slot, the second end of rotary variable rotor is supported and positioned;Ejector is movably arranged in locking assembly, ejector is suitable to extend tightly pressing rotating shaft towards slot when locking assembly is tightly pressed on the first end of rotary variable rotor, and pressure is applied to rotating shaft to force rotating shaft and rotary variable rotor to separate.Solve the problem that rotary variable rotor is easy to scatter in repair operation and scrap, reduce repair operation cost, improve repair operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of drive motor disassembly tooling technology, specifically to a non-destructive disassembly tooling for a drive motor resolver rotor and its application method. Background Technology

[0002] During the power output process of the drive motor, in order to control the motor's speed and torque accuracy, the phase control of the input three-phase AC power must accurately detect the absolute position of the rotor. At this time, a resolver rotor is mounted on the shaft. The analog signal emitted by the resolver rotor is converted into a digital representation of the resolver's absolute position by an R / D conversion chip. When the resolver rotor's zero position is aligned with the rotor's zero position and zeroed, the absolute position of the resolver rotor can be used to represent the absolute position of the rotor.

[0003] The resolver rotor is manufactured using a silicon steel sheet lamination process. Each layer of silicon steel sheet is high-speed punched and then pressed together by several lamination points. To ensure the resolver rotor's own precision, precision cold punching is used in the process, ensuring the manufacturing accuracy of parts after mass production. The resolver rotor and the shaft are precisely fitted with a small clearance and pressed together by the resolver cover, so that each layer of silicon steel sheet on the resolver rotor is tightly pressed together. During the normal operation of the drive motor, the resolver rotor remains stationary relative to the shaft and is firmly fixed to the shaft.

[0004] When the production line experiences NVH (Noise, Vibration, and Harshness) test failures of the drive motor due to defective shaft manufacturing, or when the drive motor is accidentally damaged during prolonged customer use, the drive motor should be reworked, requiring the removal of the resolver rotor mounted on the shaft. Because the resolver rotor and shaft use a small-clearance precision fit, repeated thermal shocks during drive motor operation, and long-term oxidation and corrosion of the mating surfaces, often cause the resolver rotor to become stuck on the shaft before disassembly, making manual disassembly difficult. When operators use ordinary tools such as flathead screwdrivers and rubber mallets, uneven force application can easily lead to loose resolver rotor segments (or "openings"), resulting in a loose resolver rotor that cannot guarantee the stability of analog signal transmission, rendering it unusable. Summary of the Invention

[0005] To address the aforementioned technical problems, the purpose of this invention is to provide a non-destructive disassembly fixture for drive motor resolver rotors and its usage method, which solves the problem of resolver rotors being easily disintegrated and scrapped during rework operations, reduces rework operation costs, and improves rework operation efficiency.

[0006] The technical solution of this invention is:

[0007] One objective of this invention is to provide a non-destructive disassembly fixture for a drive motor resolver rotor, comprising:

[0008] The positioning component has a slot on one side wall at one end for accommodating the resolver rotor and a positioning part in the middle that cooperates with the shaft of the drive motor to pre-position the shaft.

[0009] A locking assembly is axially telescopically movable at the other end of the positioning member, adapted to abut against the first end of the resolver rotor placed in the slot when extending toward the slot;

[0010] A movable stop is detachably installed at the slot to support and position the second end of the resolver rotor when the resolver rotor is placed in the slot.

[0011] An ejector, retractably and movably disposed within the locking assembly, is adapted to extend toward the slot and press against the shaft when the locking assembly is pressed against the first end of the resolver rotor, thereby forcing the shaft to separate from the resolver rotor.

[0012] Optionally, the movable stop includes:

[0013] The stop body is in the shape of a semi-circular ring, with a semi-circular notch formed in the middle, and first mating surfaces formed on both sides of the semi-circular notch;

[0014] The connectors are fixed one-to-one on the first mating surface and extend outwards;

[0015] The positioning part is a semi-circular positioning opening that mates with the semi-circular notch to form a positioning hole that matches the outer circumference of the rotating shaft. The two ends of the positioning part have second mating surfaces that correspond one-to-one with the first mating surfaces. The second mating surfaces are respectively provided with mating holes that mate with the extension portion of the connector.

[0016] Optionally, the connector is a metal connector that can be attracted by a magnet, and a magnetic attracting element is also provided in the mating hole. The magnetic attracting element attracts and fixes the connector when it is inserted into the mating hole.

[0017] Optionally, the connecting member is a locating pin, which has an interference fit with the stop body and a clearance fit with the mating hole.

[0018] Optionally, the positioning component is a positioning sleeve, the inner peripheral wall of which is formed with internal threads; the locking assembly includes:

[0019] A locking sleeve is telescopically movable inside the positioning sleeve, which is oriented toward or away from the slot. One end of the locking sleeve is adapted to press against the first end of the resolver rotor when it extends toward the slot. The outer peripheral wall of the locking sleeve is threadedly connected to the inner peripheral wall of the positioning component, and the inner peripheral wall of the locking sleeve is threadedly engaged with the ejector.

[0020] A locking nut, which is threaded to the outer peripheral wall of the locking sleeve and located between the locking sleeve and the positioning sleeve, is used to lock the locking sleeve when the locking sleeve is pressed against the first end of the resolver rotor.

[0021] Optionally, the positioning sleeve, the locking sleeve, and the locking nut are arranged coaxially.

[0022] Optionally, the outer peripheral walls of the positioning sleeve, locking sleeve, and locking nut are knurled.

[0023] Optionally, the ejector includes:

[0024] A vertical ejector rod is threaded into the inside of the locking sleeve, and one end of it has a tightening part that mates with the center hole of the rotating shaft;

[0025] A horizontal operating lever is connected to the other end of the vertical ejector lever.

[0026] Optionally, the clamping part is a clamping conical surface.

[0027] Another objective of this invention is to provide a method for using a non-destructive disassembly fixture for a drive motor resolver rotor, comprising:

[0028] Remove the rotor of the drive motor to be repaired and remove the resolver cover that clamps the resolver rotor;

[0029] The resolver rotor is placed in the slot and the rotor shaft is placed in the positioning part for pre-positioning;

[0030] A movable stop is installed at the slot to support the second end of the resolver rotor;

[0031] Rotate the locking sleeve so that it presses against the first end of the rotary rotor, locking the locking nut;

[0032] Screw in the ejector, so that the clamping cone surface of the vertical ejector rod is clamped and positioned inside the center hole of the rotor;

[0033] The ejector is continuously screwed in to apply pressure to the shaft, forcing the shaft to separate from the resolver rotor until the resolver rotor is removed from the shaft.

[0034] Compared with the prior art, the advantages of the present invention are:

[0035] The non-destructive disassembly fixture for the drive motor resolver rotor of this invention uses a locking assembly and a movable stop to clamp both ends of the resolver rotor, generating sufficient internal stress. The ejector then applies pressure to the shaft, allowing the resolver rotor to be disassembled without damage. This effectively prevents the resolver rotor from scattering or having poor openings during disassembly. The fixture has a simple structure, is easy to use, and is highly efficient, reducing rework costs and improving rework efficiency. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Figure 1 This is a schematic diagram of the non-destructive disassembly tooling for the drive motor resolver rotor according to an embodiment of the present invention;

[0038] Figure 2 for Figure 1 A schematic diagram of the axial cross-sectional structure of the non-destructive disassembly tooling for the drive motor resolver rotor;

[0039] Figure 3 for Figure 1 A schematic diagram of the transverse cross-sectional structure at the interface between the movable stop and the positioning component of the non-destructive disassembly tooling for the drive motor resolver rotor;

[0040] Figure 4 This is a top view of the resolver rotor to be disassembled according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the non-destructive disassembly tooling for the drive motor resolver rotor in an embodiment of the present invention.

[0042] The components include: 1. Rotor; 2. Resolver rotor; 3. Non-destructive disassembly fixture for drive motor resolver rotor; 3.1. Movable stop; 3.2. Connector; 3.3. Positioning component; 3.3.1. Positioning hole; 3.3.2. Groove; 3.4. Locking nut; 3.5. Locking sleeve; 3.6. Ejector; 3.7. Magnetic suction component. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0044] Example:

[0045] See Figures 1 to 5An embodiment of the present invention provides a non-destructive disassembly fixture for a drive motor resolver rotor, comprising a positioning component 3.3, a locking assembly, a movable stop 3.1, and an ejector 3.6.

[0046] Positioning component 3.3 is a positioning sleeve that extends axially through the center. One side wall of one end of the positioning sleeve is also... Figure 1 The upper right side of the positioning sleeve shown has a U-shaped slot 3.3.2 for accommodating the resolver rotor 2. The middle of the upper end of the positioning sleeve has a semi-circular positioning part that mates with the shaft of the drive motor to pre-position the shaft. Second mating surfaces are formed at both ends of the positioning part, and each of the two second mating surfaces has an axis perpendicular to the positioning sleeve. Figure 3 The lateral mating hole is shown. The inner circumferential wall of the positioning sleeve is provided with internal threads. In some preferred embodiments, the internal threads on the inner circumferential wall of the positioning sleeve are fine-pitch threads.

[0047] A locking assembly is axially telescopically movable at the other end of the positioning member 3.3, adapted to abut against the first end of the resolver rotor 2 placed within the slot 3.3.2 when extending toward the slot 3.3.2. Specifically, as... Figures 1 to 2 As shown, the locking assembly includes a locking sleeve 3.5 and a locking nut 3.4 coaxially fitted together. The locking sleeve 3.5 also extends axially through the center, and its inner circumferential wall is provided with internal threads, such as fine threads, for thread engagement with the ejector 3.6. This allows the ejector 3.6 to extend and retract within the locking sleeve 3.5. Specifically, when extending towards the slot 3.3.2, it pushes against the rotating shaft, applying pressure to force the shaft out of the positioning part, thereby causing the resolver rotor 2 to detach from the shaft. The outer circumferential wall of the locking sleeve 3.5 is provided with external threads that match the internal threads of the inner circumferential wall of the positioning sleeve. This allows the locking sleeve 3.5 to be axially telescopically moved towards or away from the slot 3.3.2 within the positioning sleeve. One end of the locking sleeve 3.5 is also... Figure 1The upper end of the locking sleeve 3.5 shown is adapted to press against the first end of the resolver rotor 2 when it extends toward the slot 3.3.2, and works with the movable stop 3.1 to support and position the second end of the resolver rotor 2, so that the resolver rotor 2 generates sufficient internal stress to prevent the resolver rotor 2 from breaking apart or having poor opening during disassembly. The locking nut 3.4 is threaded to the outer peripheral wall of the locking sleeve 3.5 and is located between the locking sleeve 3.5 and the positioning sleeve, and is used to lock the locking sleeve 3.5 when it is pressed against the first end of the resolver rotor 2. This prevents the locking sleeve 3.5 from accidentally loosening. The locking nut 3.4 has a simple structure, is easy to process, and provides a reliable lock. As an alternative embodiment, the ejector 3.6 and the locking sleeve 3.5 may not be threaded. For example, the outer peripheral wall of the ejector 3.6 and the inner peripheral wall of the locking sleeve 3.5 may both be smooth and have a clearance fit, allowing the ejector 3.6 to be moved manually or with the aid of tools such as a cylinder. In some preferred embodiments, in order to facilitate the rotation of the locking sleeve 3.5, the locking nut 3.4 and the positioning sleeve, knurling is performed on the outer peripheral walls of the locking sleeve 3.5, the locking nut 3.4 and the positioning sleeve to form a rough knurled texture. The specific shape and structure of the knurled texture are not described in detail or are not particularly limited here.

[0048] The movable stop 3.1 is detachably installed at the slot 3.3.2, providing support and positioning for the second end of the resolver rotor 2 when it is placed within the slot 3.3.2. Specifically, as follows... Figures 1 to 3 As shown, the movable stop 3.1 includes a stop body and a connector 3.2. The stop body is semi-circular, with a semi-circular notch extending axially through its center. First mating surfaces are formed on both sides of the semi-circular notch. The semi-circular notch mates with the positioning portion of the semi-circular positioning port to form a circular positioning hole 3.3.1 that matches the outer circumference of the rotating shaft. Two first mating surfaces correspond one-to-one with two second mating surfaces. Each of the two first mating surfaces has a connector 3.2, which protrudes outwards by a diameter parallel to the transverse direction of the positioning hole 3.3.1. In some embodiments, the connector 3.2 is a metal connector 3.2 that can be attracted by a magnet. A magnetic suction element 3.7 is also provided inside the mating hole, which attracts and fixes the connector 3.2 when it is inserted into the mating hole. In this embodiment, the connector 3.2 is a positioning pin made of iron, which has an interference fit with the stop body and a clearance fit with the mating hole.

[0049] In some preferred embodiments, the positioning sleeve, locking sleeve 3.5, and locking nut 3.4 are coaxially arranged. This facilitates processing and, being coaxial with the shaft of rotor 1, allows for non-destructive disassembly of the resolver rotor 2.

[0050] The ejector 3.6 is telescopically movably disposed within the locking assembly. The ejector 3.6 is adapted to extend toward the slot 3.3.2 to press against the rotating shaft and apply pressure to the rotating shaft when the locking assembly is pressed against the first end of the resolver rotor 2, thereby forcing the rotating shaft to separate from the resolver rotor 2. Specifically, as... Figures 1 to 2 As shown, the ejector 3.6 is a T-shaped ejector 3.6, including a vertical ejector rod and a horizontal operating rod. The vertical ejector rod is threaded into the inside of the locking sleeve 3.5, and one end of the vertical ejector rod has a clamping part that mates with the center hole of the rotating shaft. The middle part of the horizontal operating rod is connected to the other end of the vertical ejector rod. In some preferred embodiments, the clamping part is a clamping conical surface, which facilitates positioning with the center hole of the rotating shaft.

[0051] This invention also provides a method for using the non-destructive disassembly fixture for the drive motor resolver rotor described in the above embodiments, including:

[0052] Remove the rotor 1 of the drive motor to be repaired and remove the resolver cover that clamps the resolver rotor 2;

[0053] The resolver rotor 2 is placed in slot 3.3.2 and the rotor shaft of rotor 1 is placed in the positioning part for pre-positioning;

[0054] A movable stop 3.1 is installed at slot 3.3.2 to support the second end of the resolver rotor 2;

[0055] Rotate the locking sleeve 3.5 so that the locking sleeve 3.5 presses against the first end of the resolver rotor 2, locking the locking nut 3.4;

[0056] Screw in the ejector 3.6 so that the clamping cone surface of the vertical ejector rod is clamped and positioned in the center hole of the rotor 1;

[0057] The ejector 3.6 is continuously screwed in to apply pressure to the shaft, forcing the shaft to separate from the resolver rotor 2 until the resolver rotor 2 is removed from the shaft.

[0058] After the resolver rotor 2 is disassembled, the operator first loosens the locking nut 3.4, then retracts the locking sleeve 3.5, and then takes out the resolver rotor 2.

[0059] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A non-destructive disassembly fixture for a drive motor resolver rotor, characterized in that, include: The positioning component (3.3) has a slot (3.3.2) for accommodating the resolver rotor (2) on one side wall at one end, and a positioning part in the middle that cooperates with the shaft of the drive motor to pre-position the shaft; the positioning component (3.3) is a positioning sleeve, and its inner peripheral wall is formed with internal threads. A locking assembly is axially telescopically movable at the other end of the positioning component (3.3), adapted to abut against the first end of the resolver rotor (2) placed in the slot (3.3.2) when extending toward the slot (3.3.2); the locking assembly includes: a locking sleeve (3.5), telescopically movable toward or away from the slot (3.3.2) inside the positioning sleeve, one end of which is adapted to abut against the first end of the resolver rotor (2) when extending toward the slot (3.3.2), the outer peripheral wall of the locking sleeve (3.5) being threadedly connected to the inner peripheral wall of the positioning component (3.3); a locking nut (3.4), the locking nut (3.4) being threadedly connected to the outer peripheral wall of the locking sleeve (3.5) and located between the locking sleeve (3.5) and the positioning sleeve, for locking the locking sleeve (3.5) when the locking sleeve (3.5) abuts against the first end of the resolver rotor (2); A movable stop (3.1) is detachably installed at the slot (3.3.2) to support and position the second end of the resolver rotor (2) when it is placed in the slot (3.3.2). The movable stop (3.1) includes: a stop body in the shape of a semi-circular ring with a semi-circular notch in the middle, and first mating surfaces on both sides of the semi-circular notch; a connecting member (3.2) fixed to the first mating surface and extending outward; a positioning part is a semi-circular positioning opening that mates with the semi-circular notch to form a positioning hole (3.3.1) that matches the outer circumference of the rotating shaft, and second mating surfaces corresponding to the first mating surfaces are formed at both ends of the positioning part. Mating holes that mate with the extension of the connecting member (3.2) are correspondingly opened on the second mating surfaces. An ejector (3.6) is telescopically movably disposed within the locking assembly. The ejector (3.6) is adapted to extend toward the slot (3.3.2) to press against the rotating shaft and apply pressure to the rotating shaft when the locking assembly is pressed against the first end of the resolver rotor (2), thereby forcing the rotating shaft to separate from the resolver rotor (2). The inner peripheral wall of the locking sleeve (3.5) is threadedly engaged with the ejector (3.6).

2. The non-destructive disassembly fixture for a drive motor resolver rotor according to claim 1, characterized in that, The connector (3.2) is a metal connector (3.2) that can be attracted by a magnet. A magnetic attractor (3.7) is also provided in the mating hole. The magnetic attractor (3.7) attracts and fixes the connector (3.2) when the connector (3.2) is inserted into the mating hole.

3. A non-destructive disassembly fixture for a drive motor resolver rotor according to claim 1 or 2, characterized in that, The connector (3.2) is a positioning pin, which is interference-fitted with the stop body and clearance-fitted with the mating hole.

4. The non-destructive disassembly fixture for a drive motor resolver rotor according to claim 1, characterized in that, The positioning sleeve, locking sleeve (3.5) and locking nut (3.4) are coaxially arranged.

5. A non-destructive disassembly fixture for a drive motor resolver rotor according to claim 1 or 4, characterized in that, The outer peripheral walls of the positioning sleeve, locking sleeve (3.5) and locking nut (3.4) are knurled.

6. The non-destructive disassembly fixture for a drive motor resolver rotor according to claim 1, characterized in that, The ejector (3.6) includes: A vertical ejector rod is threaded into the inside of the locking sleeve (3.5), and one end of it has a tightening part that mates with the center hole of the rotating shaft; A horizontal operating lever is connected to the other end of the vertical ejector lever.

7. The non-destructive disassembly fixture for a drive motor resolver rotor according to claim 6, characterized in that, The tightening part is a tightening conical surface.

8. A method of using the non-destructive disassembly fixture for a drive motor resolver rotor according to any one of claims 1-7, characterized in that, include: Remove the rotor (1) of the drive motor to be repaired and remove the resolver cover that clamps the resolver rotor (2); The resolver rotor (2) is placed in the slot (3.3.2) and the shaft of the rotor (1) is placed in the positioning part for pre-positioning; A movable stop (3.1) is installed at the slot (3.3.2) to support the second end of the resolver rotor (2); Rotate the locking sleeve (3.5) so that the locking sleeve (3.5) presses against the first end of the resolver rotor (2) and locks the locking nut (3.4); Screw in the ejector (3.6) so that the clamping cone surface of the vertical ejector rod is clamped and positioned in the center hole of the rotor (1); The ejector (3.6) is continuously screwed in to apply pressure to the shaft, forcing the shaft to separate from the resolver rotor (2) until the resolver rotor (2) is removed from the shaft.

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