Thickness detection mechanism of micro-motor rotor core

Abstract

The utility model relates to a thickness detection mechanism for a micro-motor rotor core. The thickness detection mechanism comprises a pressing rod, a rotor core adsorption piece, a limiting piece, a rack, a rack guide piece, a gear and an encoder, the rack guiding piece and the limiting piece are installed on the rack connecting piece, the rack is sleeved with the rack guiding piece and limited through the limiting piece, the gear is tightened through the spring, and gear teeth of the gear are meshed with teeth on the rack, so that the rack is kept in an upward jacking state; the gear is connected with an encoder through an input shaft; when the pressing rod is pressed downwards, a rotor shaft of the rotor is inserted into the pressing rod, the pressing rod pushes the rotor core to move downwards relative to the rotor core adsorption piece to press the rack downwards, the rack moves downwards to drive the gear to rotate, an input shaft of the encoder generates a pulse signal, a pulse signal value is read through the control system and compared with a set standard position value, and the thickness of the rotor core is detected. And judging whether the thickness of the rotor core is qualified. The device has the advantages of simple structure and high detection efficiency.

Description

Technical Field

[0001] This utility model relates to a thickness detection mechanism for the rotor core of a micro motor. Background Technology

[0002] Currently, suppliers produce semi-finished rotors and control the core thickness, then sell the semi-finished products to motor manufacturers. However, if the supplier's control over the core thickness is poor, and the motor manufacturer's insulation sheet machine does not test the core thickness, the following drawbacks will occur after the motor manufacturer assembles the insulation sheets: First, because the insulation sheet machine is connected to a fully automated production line, uneven core thickness will increase the winding failure rate, leading to poor production stability. Second, the yield rate of the produced micro-motor rotors will decrease, resulting in a large number of defective products. Therefore, motor manufacturers need to test the core thickness of the micro-motor rotor during the assembly of the micro-motor rotor insulation sheets. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a simple and efficient mechanism for detecting the thickness of a micro-motor rotor core.

[0004] The purpose of this utility model is achieved as follows: a thickness detection mechanism for a micro-motor rotor core includes a pressure rod, a rotor core adsorption component, a limiting plate, a rack, a rack guide component, a gear, and an encoder. The rack guide component and the limiting plate are mounted on the frame connector. The rack is fitted into the rack guide component and limited by the limiting plate. The gear is wound by a spring, and the gear teeth mesh with the teeth on the rack, keeping the rack in an upward-pushing state. The gear is connected to the encoder through an input shaft. When the pressure rod is pressed down, the rotor shaft of the rotor is inserted into the pressure rod, and the pressure rod pushes the rotor core downward relative to the rotor core adsorption component, pressing down the rack. This downward movement of the rack drives the gear to rotate. A pulse signal is generated by the input shaft of the encoder. The control system reads the pulse signal value and compares it with the set standard position value to detect the thickness of the rotor core and determine whether the thickness of the rotor core is qualified.

[0005] In this invention, the rotor core adsorption component is equipped with a magnet and has an adsorption surface that matches the side shape of the rotor core.

[0006] In this utility model, side plates for mounting gears are provided on the left and right sides of the rack guide.

[0007] In this invention, the pressure rod is provided with a shaft cap that matches the size of the rotor core. The shaft cap can distinguish whether the iron sheets of the rotor core are warped. The shaft cap is provided with a shaft hole to prevent the rotor shaft from being exposed.

[0008] In this utility model, the rack is provided with a slide bar that matches the slide rail provided by the rack guide member, and the rack is limited by the upper end of the slide bar hitting the limiting piece.

[0009] In this invention, the rack is provided with a groove on the lower shaft of the rotor to prevent air leakage.

[0010] The positive effects of this invention are that it can ensure the thickness of the micro-motor rotor core meets quality standards. In fully automated production lines for insulating sheet assembly, it offers good production stability and increases the yield of high-quality micro-motor rotors. This invention utilizes a rack and pinion meshing structure; the rack moves downwards, driving the gear to rotate. An encoder input shaft generates a pulse signal, which is then compared with a set rotor core thickness value by the control system to analyze whether the rotor core is too thin, thus performing quality inspection. This invention has the advantages of simple structure and high detection efficiency.

[0011] The following embodiments, in conjunction with the accompanying drawings, further illustrate the present invention. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the present utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the component assembly three-dimensional structure of the embodiment;

[0014] Figure 3 yes Figure 1 A three-dimensional structural schematic diagram of the embodiment for detecting the initial state;

[0015] Figure 4 yes Figure 1 A three-dimensional structural schematic diagram of the detection state in the embodiment;

[0016] Figure 5 yes Figure 1 A three-dimensional structural diagram of the detection completion status in the embodiment.

[0017] In the diagram, 1. Pressure bar; 2. Limiting plate; 3. Rack; 4. Rack guide; 5. Gear; 6. Encoder; 7. Frame connector; 8. Spring; 9. Input shaft; 10. Rotor core adsorption component; 11. Magnet; 12. Rotor core; 13. Adsorption surface; 14. Side plate; 15. Shaft cap; 16. Shaft hole; 17. Rotor shaft; 18. Slide bar; 19. Slide rail; 20. Slot. Detailed Implementation

[0018] Reference Figures 1 to 5This embodiment is a thickness detection mechanism for a micro-motor rotor core, including a pressure rod 1, a rotor core adsorption component 10, a limiting plate 2, a rack 3, a rack guide 4, a gear 5, and an encoder 6. The pressure rod is equipped with a shaft cap 15 that matches the size of the rotor core. The shaft cap can distinguish whether the iron sheets of the rotor core are warped. The shaft cap is equipped with a shaft hole 16 to prevent the rotor shaft from being exposed. The rack guide and the limiting plate are mounted on the frame connector 7. Side plates 14 for mounting gears are provided on the left and right sides of the rack guide. The rack is fitted in the rack guide and is equipped with a slide bar 18 that matches the slide rail 19 opened in the rack guide. The upper end of the slide bar hits the limiting plate to limit the rack. The rack is equipped with a rotor shaft to prevent the rotor from being exposed. The lower shaft has a groove 20; the gear is wound by a spring 8, and the gear teeth mesh with the teeth on the rack, keeping the rack in an upward-pushing state; the gear is connected to an encoder via an input shaft 9; the rotor core adsorption component is equipped with a magnet 11 and has an adsorption surface 13 that matches the side shape of the rotor core; when the pressure rod is pressed down, the rotor shaft 17 of the rotor is inserted into the pressure rod, and the pressure rod pushes the rotor core 12 to move down relative to the rotor core adsorption component, thus pressing down the rack, causing the rack to move down and drive the gear to rotate, and the input shaft of the encoder generates a pulse signal. The control system reads the pulse signal value and compares it with the set thickness position value of the rotor core to detect the thickness of the rotor core and determine whether the thickness of the rotor core is qualified.

[0019] The testing process of this utility model: Refer to Figure 3 Initial state: The rack is not pressed down, the rotor is attracted to the station by the magnet and is ready. Due to the tension of the spring, the rack remains in an upward pushing state. Limited by the limiting plate, the rack cannot be pushed out of the guide block; (Refer to...) Figure 4 Detection status: When the pressure rod is pressed down, the rotor shaft is inserted into the shaft hole of the pressure rod shaft cap. The shaft hole prevents the rotor shaft from being exposed to air. The pressure rod directly pushes the rotor core downward relative to the rotor core adsorption component. The rotor core hits the rack and presses down on the rack, causing the rack to move downward. Because the teeth on the rack mesh with the gear teeth, the downward movement of the rack causes the gear connected to the encoder to rotate. The input shaft of the encoder generates a pulse signal. The control system reads the pulse signal value and compares it with the set thickness position value of the rotor core to analyze whether the rotor core is too thin, thus performing quality inspection. Figure 5 The test is complete when the pressure bar is raised, completing the cycle test of one rotor core.

Claims

1. A thickness detection mechanism for a micro-motor rotor core, characterized in that: The system includes a pressure rod (1), a rotor core adsorption component (10), a limiting plate (2), a rack (3), a rack guide component (4), a gear (5), and an encoder (6). The rack guide component and the limiting plate are installed on the frame connector (7). The rack is fitted in the rack guide component and limited by the limiting plate. The gear is wound by a spring (8). The gear teeth mesh with the teeth on the rack, keeping the rack in an upward-pushing state. The gear is connected to the encoder through an input shaft (9). When the pressure rod is pressed down, the rotor shaft (17) of the rotor is inserted into the pressure rod. The pressure rod pushes the rotor core (12) to move down relative to the rotor core adsorption component and presses down the rack, causing the rack to move down and drive the gear to rotate. The input shaft of the encoder generates a pulse signal. The control system reads the pulse signal value and compares it with the set standard position value to detect the thickness of the rotor core.

2. The thickness detection mechanism for the micro-motor rotor core according to claim 1, characterized in that: The rotor core adsorption component is provided with a magnet (11) and has an adsorption surface (13) that matches the side shape of the rotor core.

3. The thickness detection mechanism for the micro-motor rotor core according to claim 1, characterized in that: Side plates (14) for mounting gears are provided on the left and right sides of the rack guide.

4. The thickness detection mechanism for the micro-motor rotor core according to claim 1, characterized in that: The pressure bar is provided with a shaft cap (15) that matches the size of the rotor core, and the shaft cap is provided with a shaft hole (16) to prevent the rotor shaft from being exposed.

5. The thickness detection mechanism for the micro-motor rotor core according to claim 1, characterized in that: The rack is provided with a slide bar (18) that matches the slide rail (19) opened by the rack guide member, and the rack is limited by the upper end of the slide bar hitting the limiting piece.

6. The thickness detection mechanism for the micro-motor rotor core according to claim 1, characterized in that: The rack is provided with a groove (20) for the lower shaft of the rotor.

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