Servo motor embedded rotor magnetic steel pasting strength detection device

Abstract

The utility model discloses a servo motor embedded rotor magnetic steel pasting strength detection device, which relates to the technical field of servo motor detection, and comprises a base and an upper positioning pressing block, the center of the base is provided with a through hole, the top of the base is provided with a sleeve, and a plurality of torsion springs are uniformly distributed along the circumference of the sleeve. The upper side of one end of each torsional spring is provided with a pressing needle connected with the sleeve in a sliding mode, the center of the sleeve is provided with a lower installation groove used for containing the rotor set, and the upper positioning pressing block is located above the sleeve and used for being arranged at the top of the rotor set in a sleeving mode. According to the application, the rotor set is pressed downwards in a manner that the magnetic steels on the rotor set are in one-to-one correspondence with the pressing needles and the torsional springs in the sleeve, so that the pressing needles jack the magnetic steels under the action of the torsional springs, and the magnetic steels with insufficient pasting strength are ejected out of the abdicating grooves of the upper positioning block under the action of the torsional springs and the pressing needles, so that each magnetic steel can be detected simultaneously; and the efficiency is greatly improved while missing detection is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of servo motor testing, specifically to a device for testing the adhesion strength of embedded rotor magnets in a servo motor. Background Technology

[0002] During the production of servo motors, it is necessary to test the adhesion strength of the embedded rotor magnets. The adhesion strength of the magnets directly affects their fixation to the rotor core. If the adhesion is not firm, the magnets may shift during high-speed rotation or vibration, resulting in uneven magnetic field distribution, which in turn causes torque fluctuations, reduced efficiency, or even motor malfunction. Current technology for testing the magnet adhesion strength of servo motors generally uses a method of testing each magnet individually, which is inefficient and prone to missed detections. Summary of the Invention

[0003] The purpose of this invention is to provide a device for detecting the bonding strength of embedded rotor magnets in a servo motor, so as to overcome the above-mentioned defects in the prior art.

[0004] A servo motor embedded rotor magnet bonding strength testing device includes a base and an upper positioning pressure block. The base has a through hole in the center and a sleeve on its top. Several torsion springs are evenly distributed along the circumference of the sleeve. Each torsion spring has a pressure needle slidably connected to the sleeve on its upper side at one end. The sleeve has a lower mounting groove for placing the rotor assembly at its center. The upper positioning pressure block is located above the sleeve and is used to fit over the top of the rotor assembly.

[0005] Preferably, the torsion spring is located in the limiting groove of the sleeve, and the other end of the torsion spring is inserted into the slot of the base.

[0006] Preferably, the pressure needle is slidably inserted into a groove on the sleeve and has a stop bar at its lower end.

[0007] Preferably, the upper positioning block is provided with an upper mounting groove for placing the upper shaft of the rotor assembly, and the upper positioning block is provided with a clearance groove coaxially below the upper mounting groove.

[0008] Preferably, a number of pressure columns for abutting the iron core on the rotor assembly are evenly distributed along the circumference of the relief groove.

[0009] Preferably, the upper end of the pressure needle has a tapered structure.

[0010] Preferably, the base and the sleeve are connected by a number of bolts.

[0011] The beneficial effects achieved by this utility model are as follows:

[0012] This application uses a method where the magnets on the rotor assembly correspond one-to-one with the pressure needles and torsion springs in the sleeve. By pressing the rotor assembly downwards, the pressure needles lift the magnets under the action of the torsion springs. Magnets with insufficient adhesion strength will be pushed out into the relief groove of the upper positioning block under the action of the torsion springs and pressure needles, so that each magnet can be detected at the same time, avoiding missed detections and greatly improving efficiency. Attached Figure Description

[0013] Figure 1 This is a front view of the entire utility model.

[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the rotor assembly, pressure pin, base, and torsion spring of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the sleeve and pressure needle of this utility model.

[0017] Figure 5 This is a schematic diagram of the structure of the sleeve, torsion spring and pressure needle of this utility model.

[0018] Figure 6 This is a schematic diagram of the positioning block and pressure column of this utility model.

[0019] In the diagram, 1 is the base; 11 is the slot; 12 is the through hole; 2 is the sleeve; 21 is the lower mounting groove; 22 is the limiting groove; 3 is the torsion spring; 4 is the pressure pin; 41 is the stop bar; 5 is the upper positioning block; 51 is the upper mounting groove; 52 is the clearance groove; 53 is the pressure column; 6 is the rotor assembly; 61 is the rotating shaft; 62 is the iron core; and 63 is the magnet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0022] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] like Figure 1-6 As shown, this utility model provides a servo motor embedded rotor magnet bonding strength detection device, including a base 1 and an upper positioning pressure block 5. The base 1 has a through hole 12 in the center and a sleeve 2 on its top. The base 1 and the sleeve 2 are connected by several bolts, which facilitates the disassembly and assembly of the base 1 and the sleeve 2.

[0024] Several torsion springs 3 are evenly distributed along the circumference of the sleeve 2. The torsion springs 3 are located in the limiting groove 22 of the sleeve 2. Each torsion spring 3 has a pressure needle 4 that is slidably connected to the sleeve 2 on the upper side of one end. The upper end of the pressure needle 4 has a conical structure, which facilitates the pressure needle 4 to lift the magnet 63. The other end of the torsion spring 3 is inserted into the slot 11 of the base 1. The torsion spring 3 is positioned by the limiting groove 22 and the slot 11. The center of the sleeve 2 is provided with a lower mounting groove 21 for placing the rotor assembly 6. The upper positioning pressure block 5 is located above the sleeve 2 and is used to fit on the top of the rotor assembly 6.

[0025] In addition, the pressure needle 4 is slidably inserted into the groove on the sleeve 2 and a stop bar 41 is provided at its lower end to prevent the pressure needle 4 from shifting when not in use;

[0026] In addition, the upper positioning block 5 is provided with an upper mounting groove 51 for placing the upper shaft 61 of the rotor assembly 6. The upper positioning block 5 is coaxially provided with a relief groove 52 below the upper mounting groove 51. A number of pressure columns 53 for abutting the iron core 62 of the rotor assembly 6 are evenly distributed along the circumference of the relief groove 52. During the test, the magnet 63 with insufficient bonding strength can be staggered from the iron core 62.

[0027] Detailed implementation methods and principles:

[0028] When in use, the base 1 is installed on the worktable of the pneumatic press, and the upper positioning block 5 is installed on the lower end of the piston rod of the cylinder on the pneumatic press. The rotor assembly 6 is placed in the lower mounting groove 21 of the sleeve 2 and the position of the rotor assembly 6 is adjusted so that the magnet 63 on the rotor assembly 6 is aligned with the pressure needle 4 in the sleeve 2.

[0029] Next, the cylinder is activated. The piston rod of the cylinder drives the upper positioning block 5 to move downward, so that the upper mounting groove 51 and the clearance groove 52 of the upper positioning block 5 are fitted onto the rotor assembly 6. The pressure column 53 of the clearance groove 52 presses on the iron core 62 of the rotor assembly 6. When the piston rod of the cylinder continues to extend, the rotor assembly 6 is displaced downward by force, and at the same time, the pressure needle 4 is pushed downward. The torsion spring 3 starts to work until the bottom of the rotating shaft 61 of the rotor assembly 6 contacts the worktable of the pneumatic pressure table. At this time, the thrust is the maximum. If there is a magnet 63 with insufficient bonding strength, it will be pushed out into the clearance groove 52 of the upper positioning block under the action of the torsion spring 3 and the pressure needle 4.

[0030] In summary, this application uses a method where the magnets 63 on the rotor assembly 6 correspond one-to-one with the pressure needles 4 and torsion springs 3 in the sleeve 2. By pressing the rotor assembly 6 downwards, the pressure needles 4 lift the magnets 63 under the action of the torsion springs 3. Magnets 63 with insufficient adhesion strength will be pushed out into the relief grooves 52 of the upper positioning block under the action of the torsion springs 3 and pressure needles 4. This allows each magnet 63 to be detected simultaneously, avoiding missed detections and greatly improving efficiency.

[0031] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A device for detecting the bonding strength of embedded rotor magnets in a servo motor, characterized in that: The device includes a base (1) and an upper positioning block (5). The base (1) has a through hole (12) at its center and a sleeve (2) at its top. Several torsion springs (3) are evenly distributed along the circumference of the sleeve (2). Each torsion spring (3) has a pressure needle (4) that is slidably connected to the sleeve (2) on its upper side. The sleeve (2) has a lower mounting groove (21) at its center for placing the rotor assembly (6). The upper positioning block (5) is located above the sleeve (2) and is used to fit on the top of the rotor assembly (6).

2. The device for detecting the adhesion strength of the embedded rotor magnetic steel in the servo motor of claim 1, characterized in that: The torsion spring (3) is located in the limiting groove (22) of the sleeve (2), and the other end of the torsion spring (3) is inserted into the slot (11) of the base (1).

3. The device for detecting the adhesion strength of the embedded rotor magnetic steel in the servo motor of claim 1, characterized in that: The pressure needle (4) is slidably inserted into the groove on the sleeve (2) and a stop bar (41) is provided at its lower end.

4. The device for detecting the adhesion strength of the embedded rotor magnetic steel in the servo motor of claim 1, characterized in that: The upper positioning block (5) is provided with an upper mounting groove (51) for placing the upper shaft (61) of the rotor assembly (6), and the upper positioning block (5) is provided with a clearance groove (52) coaxially below the upper mounting groove (51).

5. The device for detecting the adhesion strength of the embedded rotor magnetic steel in the servo motor of claim 4, characterized in that: Several pressure columns (53) are evenly distributed along the circumference of the relief groove (52) to abut against the iron core (62) on the rotor assembly (6).

6. The device for detecting the adhesion strength of the embedded rotor magnetic steel in the servo motor of claim 1, characterized in that: The upper end of the pressure needle (4) has a conical structure.

7. The device for detecting the adhesion strength of the embedded rotor magnetic steel in the servo motor of claim 1, characterized in that: The base (1) and the sleeve (2) are connected by several bolts.

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