Disc scraper device in stator

Abstract

The utility model discloses a stator internal disc scraper device which comprises a disc cutter, a handle, a disc cutter front protection body, a disc cutter rear protection body and an inner hexagon screw, the inner hexagon screw penetrates through the disc cutter, the handle and the disc cutter front protection body to enable the disc cutter, the handle and the disc cutter front protection body to be fixedly connected with the handle, and the disc cutter front protection body and the disc cutter rear protection body are arranged at the two ends of the disc cutter respectively. The disc cutter is provided with cutter teeth, and the outer diameter of the disc cutter is smaller than the inner diameter of the stator. The disc cutter front protection body and the disc cutter rear protection body can prevent the disc cutter from damaging an enameled wire at the end part of a stator winding, and the disc cutter is pushed into a stator inner cavity to remove all foreign matters in the stator inner cavity; the structure is simple to manufacture, convenient to operate, high in benefit, reliable in quality and practical in effect; the quality problem of friction between the stator and the rotor can be thoroughly solved, and the one-time qualified rate of assembling of small and medium-sized motors is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of stator interior cleaning, in particular to a stator interior disc scraper device. Background Art

[0002] Motor manufacturers frequently encounter abnormal noise caused by friction between the stator and rotor after assembly, a quality issue that accounts for a significant proportion. Small and medium-sized motors, in particular, experience significant rework and repair, with some requiring multiple repairs before passing. This significantly impacts the first-time pass rate for motor assembly. After assembly, the rotor and stator are designed to have a single-sided air gap of only about 0.3mm. Therefore, even the slightest protrusion or foreign matter inside the stator can cause the rotor and stator to rub against each other, leading to the noise. The primary cause of this quality issue is the presence of insulating varnish, paint spikes, and other foreign matter within the stator windings, impacting the first-time pass rate for motor assembly. Cleaning the stator windings and any foreign matter inside can completely resolve the stator-rotor friction issue.

[0003] The main reason for the friction between the stator and rotor of the motor is the presence of insulating paint nodules, paint nails and other foreign matter inside the winding stator. However, almost all motor manufacturers have no way to deal with the insulating paint and foreign matter inside the stator after the winding stator insulation is varnished, and can only rely on manual repair with files. Some manufacturers simply do not clean it. Regardless of manual cleaning or not, the following defects and quality risks will occur: 1. Quality risks of manual file cleaning. Because the hardness of the insulating paint is high after drying and curing, the cleaning tools can only be files or other metal objects. The files used by the operator will accidentally touch the end of the winding, causing damage to the insulation of the stator enameled wire, resulting in a short circuit between turns or phases of the winding. If no attention is paid to repair, when the motor is powered on, the winding will burn due to a short circuit; 2. The defects of manual file cleaning. Therefore, the manual cleaning is done if the operator peeks or feels the place. If the place is not peeked or felt, it will be missed, so it is not surprising that it causes multiple repairs; 3. Some manufacturers do not clean, and the quality problem of abnormal noise caused by the friction between the stator and rotor is more, and can even reach more than 60%, which greatly affects the one-time qualified rate of the motor assembly, and multiple disassembly and assembly will affect other parts of the motor, such as precision components and bearings. Summary of the Invention

[0004] The purpose of the present utility model is to solve the problems raised in the above background technology and provide a stator internal disc scraper device.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a disc scraper device inside the stator, including a disc cutter, a handle, a front disc cutter guard, a rear disc cutter guard, and a hexagon socket screw. The hexagon socket screw passes through the disc cutter, the handle, and the front disc cutter guard to form a fixed connection between the three and the handle. The front disc cutter guard and the rear disc cutter guard are respectively arranged at the two ends of the disc cutter; the disc cutter is provided with blade teeth, and the outer diameter of the disc cutter is smaller than the inner diameter of the stator.

[0006] In the above-mentioned stator internal disc scraper device, the outer diameter of the disc scraper is 0.1 mm smaller than the inner diameter of the stator.

[0007] In the above-mentioned stator internal disc scraper device, the disc blade, the disc blade front guard, and the disc blade rear guard are respectively provided with corresponding mounting holes, and the hexagon socket screws pass through the mounting holes and are screwed and fixed to the screw holes on the handle.

[0008] In the above-mentioned stator internal disc scraper device, positioning grooves are respectively provided at both ends of the disc scraper, and positioning bosses corresponding to the positioning grooves are respectively provided on the front and rear guards of the disc scraper.

[0009] In the above-mentioned stator internal disc scraper device, a handle groove is provided on the end surface of the disc scraper rear guard corresponding to the handle, and the end of the handle is matched and abutted against the handle groove.

[0010] In the above-mentioned stator internal disc scraper device, the disc scraper front guard and the disc scraper rear guard are made of nylon.

[0011] The utility model has the following beneficial effects:

[0012] The front and rear guards of the disc cutter provided in the present invention can prevent the disc cutter from damaging the enameled wire at the end of the stator winding. The disc cutter is pushed into the inner cavity of the stator to remove all foreign matter inside the stator. Generally, the air gap between the stator and rotor of a motor is between 0.5mm and 0.8mm, that is, the air gap on one side is between 0.25mm and 0.4mm. The outer diameter of the disc cutter is 0.1mm smaller than the inner diameter of the stator, and is only 0.05mm on one side. In other words, all foreign matter within 0.05mm on one side can be cleaned at one time, that is, after the rotor is inserted into the inner cavity of the stator, the annular gap space between 0.4mm and 0.3mm is clean.

[0013] The practical structure is simple to manufacture, easy to operate, high in efficiency, reliable in quality and practical in effect; it can completely solve the quality problem of stator-rotor friction and ensure the one-time qualified rate of small and medium-sized motor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the utility model;

[0015] Figure 2This is a usage state diagram of the utility model. DETAILED DESCRIPTION

[0016] The present invention will be further described with reference to the accompanying drawings.

[0017] See also Figure 1 、 Figure 2 The utility model provides a disc scraper device inside a stator, including a disc blade 1, a handle 2, a front disc blade guard 3, a rear disc blade guard 4, and a hexagon socket screw 5. The hexagon socket screw 5 passes through the disc blade 1, the handle 2, and the front disc blade guard 3 to form a fixed connection between the three and the handle 2. Specifically, corresponding mounting holes 7 are respectively provided on the disc blade 1, the front disc blade guard 3, and the rear disc blade guard 4. The hexagon socket screw 5 passes through the mounting hole 7 and is screwed and fixed to the screw hole 8 on the handle 2.

[0018] The front guard 3 and the rear guard 4 of the disc knife are respectively arranged at the two ends of the disc knife 1. In order to improve the stability of the installation, positioning grooves 9 are respectively provided at both ends of the disc knife 1, and positioning bosses 10 corresponding to the positioning grooves 9 are respectively provided on the front guard 3 and the rear guard 4 of the disc knife; at the same time, a handle groove 11 is provided on the end face of the rear guard 4 of the disc knife corresponding to the handle 2, and the end of the handle 2 is matched and abutted against the handle groove 11.

[0019] The disc cutter 1 is provided with teeth 6. The outer diameter of the disc cutter 1 is smaller than the inner diameter of the stator. Preferably, the outer diameter of the disc cutter 1 is 0.1 mm smaller than the inner diameter of the stator. The front guard 3 and the rear guard 4 of the disc cutter are made of nylon.

[0020] like Figure 2 As shown, when in use, grip the handle 2 to push the disc cutter into the inner cavity of the stator 15. The front guard 3 of the disc cutter serves as a protection for the disc cutter 1 to enter the inner cavity of the stator. After the disc cutter 1 enters the inner cavity of the stator, it removes all foreign matter inside. The rear guard 4 of the disc cutter serves as a protection for the inner cavity of the stator when the disc cutter is retracted. The front guard 3 and the rear guard 4 of the disc cutter can prevent the disc cutter from damaging the enameled wire 16 at the end of the stator winding. The operation is simple, the efficiency is high, and the practicality is strong.

[0021] The above is a detailed introduction to a stator internal disc scraper device provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A stator internal disc scraper device, characterized by: The invention comprises a disc knife (1), a handle (2), a front disc knife guard (3), a rear disc knife guard (4), and a hexagon socket screw (5). The hexagon socket screw (5) passes through the disc knife (1), the handle (2), and the front disc knife guard (3) to form a fixed connection between the three and the handle (2). The front disc knife guard (3) and the rear disc knife guard (4) are respectively arranged at two ends of the disc knife (1); the disc knife (1) is provided with blade teeth (6), and the outer diameter of the disc knife (1) is smaller than the inner diameter of the stator.

2. A stator internal disc scraper device according to claim 1, characterized in that: The outer diameter of the disc cutter (1) is 0.1 mm smaller than the inner diameter of the stator.

3. The stator internal disc scraper device according to claim 1, characterized in that: The disc knife (1), the disc knife front guard (3), and the disc knife rear guard (4) are respectively provided with corresponding mounting holes (7), and the hexagon socket screws (5) pass through the mounting holes (7) and are screwed and fixed to the screw holes (8) on the handle (2).

4. A stator internal disc scraper device according to claim 3, characterized in that: Positioning grooves (9) are respectively provided at both ends of the disc cutter (1), and positioning bosses (10) corresponding to the positioning grooves (9) are respectively provided on the disc cutter front guard (3) and the disc cutter rear guard (4).

5. A stator internal disc scraper device according to claim 4, characterized in that: A handle groove (11) is provided on the end surface of the disc knife rear guard (4) corresponding to the handle (2), and the end of the handle (2) is matched and abutted against the handle groove (11).

6. The stator internal disc scraper device according to claim 3, characterized in that: The disc knife front guard (3) and the disc knife rear guard (4) are made of nylon.

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