Motor rotor run-out detection tool

Abstract

The utility model discloses a motor rotor run-out detection tool, which is suitable for run-out detection of the inner circumferential surface of a motor rotor housing, and comprises a positioning seat used for rotating and positioning the rotor housing, the top surface of the positioning seat is provided with a positioning hole used for inserting a rotating shaft connected to the rotor housing, and the rotating shaft is in running fit with the positioning hole; the transmission assembly comprises a contact rod movably connected with the positioning seat, a linkage push rod synchronously linked with the contact rod and an elastic piece used for driving the contact rod to reset, the contact rod is arranged between the inner circumferential surface of the rotor shell and the positioning seat, and one end of the contact rod can be always in contact with the inner circumferential surface of the rotor shell under the driving of the elastic piece; when the rotor housing rotates, the contact rod is driven to move towards the positioning seat and the contact rod drives the linkage push rod to move synchronously. And the detector comprises a detection head which can move after being pushed by external force, and the detection head is linked with the linkage push rod. The beneficial effects of the utility model lie in that jumping detection can be efficiently carried out on the inner circumferential surface of the motor rotor housing.

Description

A motor rotor runout detection fixture Technical Field

[0001] This utility model relates to a motor rotor runout detection fixture, which is an optimized design for improving the ease of operation of detecting the runout of the motor rotor housing. Background Technology

[0002] As a core component of power devices, the operating accuracy and service life of the electric motor are of paramount importance. The dynamic balance performance of the motor rotor directly affects the smoothness of motor operation, noise level, and overall efficiency. The rotor housing (usually referring to the housing structure that secures the shaft or bearings), as a key supporting component of the rotor system, has a decisive impact on the bearing installation accuracy and the radial stability of the rotor due to the machining accuracy of its inner circumferential surface, especially the runout error. Excessive runout on the inner circumferential surface leads to uneven bearing stress, accelerated wear, vibration and noise, ultimately reducing motor performance and reliability.

[0003] Currently, quality control of motor rotors mainly focuses on the inspection of the rotor shaft, magnets, or dynamic balancing blocks themselves. Therefore, there is a need to design a dedicated device for detecting runout on the inner circumferential surface of the motor rotor housing. Summary of the Invention

[0004] The purpose of this invention is to provide a motor rotor runout detection fixture that can efficiently detect runout on the inner circumferential surface of the motor rotor housing.

[0005] This utility model is achieved through the following technical solution.

[0006] A motor rotor runout detection fixture, suitable for detecting runout on the inner circumferential surface of a motor rotor housing, comprising:

[0007] A positioning seat for rotating and positioning the rotor housing, wherein a positioning hole is provided on the top surface of the positioning seat for inserting a rotating shaft connected to the rotor housing, and the rotating shaft is rotatably engaged with the positioning hole;

[0008] The transmission assembly includes a contact rod movably connected to the positioning seat, a linkage push rod synchronously linked with the contact rod, and an elastic element for driving the contact rod to reset. The contact rod is located between the inner circumferential surface of the rotor housing and the positioning seat, and one end of the contact rod can always maintain contact with the inner circumferential surface of the rotor housing under the drive of the elastic element. When the rotor housing rotates, it drives the contact rod to move toward the positioning seat, and the contact rod drives the linkage push rod to move synchronously.

[0009] The detector includes a detection head that can be moved when pushed by an external force. The detection head abuts against one end of the linkage push rod, so that the movement of the linkage push rod drives the detection head to move, and the movement stroke of the detection head determines the detection result of the detector.

[0010] As a further improvement of this utility model, the contact rod and the linkage push rod are connected by a connector, the connector is rotatably connected to the positioning seat through a rotating member, the linkage push rod is located below the contact rod, and the contact rod and the linkage push rod are symmetrically arranged relative to the rotating member.

[0011] As a further improvement of this utility model, the side portion of the positioning seat is recessed inward to form a receiving groove for accommodating the transmission component, and the rotating member is connected to the groove wall of the receiving groove.

[0012] As a further improvement of this utility model, a protective block is provided in the receiving groove. The protective block is located between the transmission assembly and the rotor housing. The protective block is provided with a first through hole for the contact rod to pass through and a second through hole for the linkage push rod to pass through, and the contact rod is at least partially exposed outside the protective block.

[0013] As a further improvement of this utility model, the surface of the protective block near the rotor housing extends in the same direction as the side of the positioning seat.

[0014] As a further improvement of this utility model, a guide block is connected to the protection block, and the guide block is provided with a guide hole that communicates with the second through hole. The detection head extends into the guide hole and abuts against one end of the linkage push rod.

[0015] As a further improvement of this utility model, the elastic element is set as a spring, with one end connected to the end of the contact rod away from the rotor housing, and the other end connected to the positioning seat.

[0016] As a further improvement of this utility model, it also includes a base plate, the positioning seat and the guide block are disposed on the base plate, and the detector is placed on the surface of the base plate.

[0017] As a further improvement of this utility model, the detector is set as a dial indicator or a percentage indicator. Attached Figure Description

[0018] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0019] Figure 1 is a schematic diagram of the fit between the testing fixture and the rotor housing;

[0020] Figure 2 is a schematic diagram of the rotor housing structure;

[0021] Figure 3 is a schematic diagram of the testing fixture;

[0022] Figure 4 is a schematic diagram of the connection between the transmission assembly and the positioning seat;

[0023] Figure 5 is a vertical sectional view of Figure 3;

[0024] Figure 6 is a schematic diagram of the structure of the protection block and the guide block working together. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0027] This embodiment provides a motor rotor runout detection fixture, which is suitable for detecting runout on the inner circumferential surface of the motor rotor housing. Referring to Figures 1-6, it includes a positioning seat 1 for rotatably supporting the rotor housing, a transmission assembly, and a detector 4. The positioning seat 1 has a positioning hole 11 on its top surface. The rotor housing 2 is connected to a rotating shaft 21 for inserting into the positioning hole 11, and the rotating shaft 21 is rotatably engaged with the positioning hole 11. There is a gap between the inner surface of the rotor housing 2 and the side surface of the positioning seat 1.

[0028] The transmission assembly includes a contact rod 31 movably connected to the positioning seat 1, a linkage push rod 32 synchronously linked with the contact rod 31, and an elastic element 35 for driving the contact rod to reset. The contact rod 31 is located between the inner circumferential surface of the rotor housing 2 and the positioning seat 1, and one end of it can always maintain contact with the inner circumferential surface of the rotor housing 2 under the drive of the elastic element. When the rotor housing rotates, it drives the contact rod 31 to move towards the mounting seat, and the contact rod drives the linkage push rod to move synchronously. The detector 4 includes a detection head 41 that can move after being pushed by an external force. The detection head 41 abuts against one end of the linkage push rod 32, so that when the linkage push rod 32 moves, it drives the detection head 41 to move. The movement stroke of the moving rod determines the detection result.

[0029] It should be mentioned that the detector 4 in this embodiment is set as a dial gauge or a percentage gauge.

[0030] In this embodiment, the rotating shaft 21 is cylindrical, and the positioning hole 11 is a cylindrical hole that matches the rotating shaft 21. The two are coaxially arranged, and the bottom end of the rotating shaft 21 abuts against the bottom wall of the positioning hole 11, so that the rotating shaft 21 can rotate around its own rotation axis. The positioning hole 11 fixes the rotating shaft 21 axially, thereby maintaining the stability of its own position when the rotor housing 2 rotates.

[0031] The working principle of the detection fixture in this embodiment is as follows: First, insert the rotating shaft 21 of the rotor housing 2 into the positioning hole 11 to complete the installation of the rotor housing. This allows the rotor housing 2 to rotate and maintain its axial fixation, and makes the contact rod 31 contact the inner circumferential surface of the rotor housing 2. When the rotor housing 2 moves, it pushes the contact rod 31 to move, thereby converting the rotor runout into linear displacement, which is then transmitted to the detector 4 via the linkage push rod 32. During detection, the operator manually rotates the rotor housing 2 and judges the runout of the motor rotor based on the difference between the maximum and minimum values ​​on the detector 4.

[0032] In this embodiment, the rotational fit design between the rotating shaft 21 and the positioning hole 11 on the positioning seat 1 ensures that the rotor housing 2 can rotate freely while maintaining its axial fixation, and the runout detection of the motor rotor can be achieved by manually rotating the rotor housing 2, which is convenient and efficient.

[0033] In addition, the rotor housing 2 can be installed and removed from the positioning seat 1 by inserting or removing the rotating shaft 21 into the positioning hole 11, which is convenient.

[0034] In this embodiment, referring to Figure 4, the contact rod 31 and the linkage push rod 32 are connected by a connector 33, and the connector 33 is rotatably connected to the positioning seat 1 via a rotating member 34. The linkage push rod 32 is located below the contact rod 31, and the contact rod 31 and the linkage push rod 32 are symmetrically arranged relative to the rotating member 34. Therefore, when the contact rod 31 moves under the drive of the rotor housing 2, the connector 33 rotates relative to the rotating member 34, causing the linkage push rod 32 to move equidistantly. Specifically, the rotating member 34 is a cylindrical rod mounted on the positioning seat 1, passing through the middle of the connector 33, and the connector 33 can rotate around the rotating member 34.

[0035] In this embodiment, in order to reduce the size of the testing fixture and improve its aesthetics, the side of the positioning seat 1 is recessed to form a receiving groove 12 for accommodating the transmission component. The connecting rod is connected to the groove wall of the receiving groove 12. At the same time, a protective block 5 is provided in the receiving groove 12. The protective block 5 is located between the transmission component and the rotor housing 2. The protective block 5 is provided with a first through hole 51 for the contact rod 31 to pass through and a second through hole 52 for the linkage push rod 32 to pass through. The contact rod 31 and the linkage push rod 32 are at least partially exposed outside the protective block 5, ensuring that the inner circumferential surface of the rotor housing 2 can contact the contact rod 31 to realize the detection of the runout of the motor rotor.

[0036] In this embodiment, the surface of the protective block 5 near the rotor housing 2 extends in the same direction as the side of the positioning seat 1, so that the protective block 5 and the positioning seat 1 form a whole in appearance after being combined, which helps to improve the aesthetics of the inspection tooling.

[0037] Furthermore, a guide block 6 is connected to the protection block 5. The guide block 6 has a guide hole 61 that connects to the second through hole. The detection head 41 extends into the guide hole 61 and abuts against one end of the linkage push rod 32. On the one hand, the guide hole 61 in the guide block 6 guides the detection head 41 to contact the linkage push rod 32, improving detection accuracy. On the other hand, the hole wall of the guide hole 61 can restrict the position of the detector 4, keeping the detector 4 stable and helping to improve the accuracy of the detection results. In addition, the protection block 5 and the guide block 6 are integrally formed structures, and only one of them needs to be fixed during installation.

[0038] In this embodiment, the elastic element 35 is a spring, with one end connected to the end of the contact rod 31 away from the rotor housing 2, and the other end connected to the bottom wall of the receiving groove 12 corresponding to the contact rod 31. It should be noted that the two ends of the elastic element 35 can be connected to the contact rod 31 and the bottom wall of the receiving groove 12 by adhesive bonding to ensure the stability of the position of the elastic element 35.

[0039] In this embodiment, the detection fixture also includes a base plate 8, a positioning seat 1 and a guide block 6 mounted on the base plate 8, and a detector 4 placed on the upper surface of the base plate 8 for easy replacement of the detector. Furthermore, the positioning seat 1 and the guide block 6 are detachably connected to the base plate 8 by bolts, thereby facilitating the maintenance of both.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tooling for detecting rotor runout of a motor, characterized in that, This device is suitable for detecting runout on the inner circumferential surface of a motor rotor housing, and includes: a positioning seat (1) for rotating and positioning the rotor housing (2), wherein the top surface of the positioning seat (1) is provided with a positioning hole (11) for inserting a rotating shaft (21) connected to the rotor housing (2), the rotating shaft (21) and the positioning hole (11) are rotatably engaged; and a transmission assembly, including a contact rod (31) movably connected to the positioning seat (1), a linkage push rod (32) synchronously linked with the contact rod (31), and an elastic element (35) for driving the contact rod to reset, wherein the contact rod (31) is located on the inner circumferential surface of the rotor housing (2) and the positioning seat (1). One end of the rotor housing (2) is always in contact with the inner circumferential surface of the rotor housing (2) under the drive of the elastic element. When the rotor housing (2) rotates, it drives the contact rod (31) to move toward the positioning seat (1) and the contact rod (31) drives the linkage push rod (32) to move synchronously. The detector (4) includes a detection head (41) that can be moved after being pushed by an external force. The detection head (41) abuts against one end of the linkage push rod (32) so that when the linkage push rod (32) moves, it drives the detection head (41) to move. The movement stroke of the detection head (41) determines the detection result of the detector (4).

2. The motor rotor runout detection fixture according to claim 1, characterized in that, The contact rod (31) and the linkage push rod (32) are connected by a connector (33), and the connector (33) is rotatably positioned on the positioning seat (1) by a rotating member (34). The linkage push rod (32) is located below the contact rod (31), and the contact rod (31) and the linkage push rod (32) are symmetrically arranged along the rotating member (34).

3. The motor rotor runout detection fixture according to claim 2, characterized in that, The side portion of the positioning seat (1) is recessed inward to form a receiving groove (12) for accommodating the transmission assembly, and the rotating member is connected to the groove wall of the receiving groove (12).

4. The motor rotor runout detection fixture according to claim 3, characterized in that, The receiving groove (12) is provided with a protective block (5), which is located between the transmission assembly and the rotor housing (2). The protective block (5) is provided with a first through hole (51) for the contact rod (31) to pass through and a second through hole (52) for the linkage push rod (32) to pass through, and the contact rod (31) is at least partially exposed outside the protective block (5).

5. The motor rotor runout detection fixture according to claim 4, characterized in that, The surface of the protective block (5) near the rotor housing (2) extends in the same direction as the side of the positioning seat (1).

6. The motor rotor runout detection fixture according to claim 4, characterized in that, The protection block (5) is connected to a guide block (6), and the guide block (6) is provided with a guide hole (61) that connects to the second through hole. The detection head (41) extends into the guide hole (61) and abuts against one end of the linkage push rod (32).

7. The motor rotor runout detection fixture according to claim 1, characterized in that, The elastic element (35) is a spring, with one end connected to the end of the contact rod (31) away from the rotor housing (2), and the other end connected to the positioning seat (1).

8. The motor rotor runout detection fixture according to claim 6, characterized in that, It also includes a base plate (8), on which the positioning seat (1) and the guide block (6) are mounted, and the detector (4) is placed on the surface of the base plate (8).

9. A motor rotor runout detection fixture according to any one of claims 1 to 8, characterized in that, The detector (4) is set as a dial gauge or a percentage gauge.

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