CN212255663U

CN212255663U - Quick detection device of motor stator magnet steel magnetic field

Info

Publication number: CN212255663U
Application number: CN201922333477.2U
Authority: CN
Inventors: 王靖尹; 苗国辉; 王家祥
Original assignee: Shanghai Taichong Electric Co ltd
Current assignee: Shanghai Taichong Electric Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-12-29
Anticipated expiration: 2029-12-23

Abstract

The utility model relates to the technical field of motors, a quick detection device in motor stator magnet steel magnetic field is disclosed, including be equipped with hollow main shaft and cross the chassis of wire casing, registrate in but the outer body of rotating freely, the fixed iron core coil and the fixed insertion of being equipped with of hollow main shaft coil axle in the hollow main shaft, through the lead-out wire with the fluxmeter that the iron core coil links to each other to and the determined stator magnet steel. The utility model has the advantages of simple operation, greatly increasing the number of detected products, improving the detection efficiency, and quickly and accurately detecting the performance condition of the magnetized magnetic steel of the stator magnetic steel.

Description

Quick detection device of motor stator magnet steel magnetic field

Technical Field

The utility model relates to the technical field of motors, especially indicate a quick detection device in motor stator magnet steel magnetic field.

Background

For a permanent magnet dc motor, the "permanent magnet" of a small motor is usually magnetic steel. The magnet steel needs to be magnetized, needs to detect after magnetizing, detects these several kinds of condition under general condition:

firstly, magnetic field measuring apparatu, the advantage is accurate comprehensive, can three-dimensional multilayer detect even. However, the measurement is time-consuming and labor-consuming, only a few samples can be checked, and full inspection is impossible.

Secondly, the surface detection of the mT meter has the advantages of convenience and rapidness, but the error is large. Because the magnetic flux leakage line on the surface of the magnetic steel is very complex in trend, the center part is not easy to be found.

Thirdly, when the magnetizing head is magnetized, when the magnetizing head is withdrawn, the coil (or another coil) in the magnetizing head can be used for inducing the magnetic flux of the magnetic steel. The method has the advantages of time and labor saving, no additional detection and large error. In addition, smaller motors cannot measure flux with additional coils because the magnetizing head is small.

Therefore, the improvement is made, and the device for rapidly detecting the magnetic steel field of the stator of the motor is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a quick detection device in motor stator magnet steel magnetic field, its simple structure, convenient and fast, be fit for assembly line operation.

In order to realize the technical characteristics, the utility model discloses a structural scheme is: the device comprises a chassis provided with a hollow main shaft and a wire passing groove, an external rotating body sleeved outside the hollow main shaft and capable of rotating freely, a coil shaft fixedly provided with an iron core coil and one end of the coil shaft fixedly inserted into the hollow main shaft, a fluxmeter connected with the iron core coil through a lead-out wire, and measured magnetic steel.

One end of the hollow main shaft is provided with a limiting disc and is in contact with the chassis, and the hollow main shaft is communicated with the wire passing groove to allow the outgoing wire to pass through.

The measured sub magnetic steel is movably sleeved at the other end of the coil shaft and then is connected with the external rotator.

The external rotation body comprises a bearing support assembly which is hollow inside and is provided with a sliding bearing and a ball bearing, and a stator positioning disc which is hollow in the middle and is fixedly connected with the bearing support assembly through a screw;

the bearing bracket component is a three-layer hollow integral structure with a bottom layer, a middle layer and an upper layer which are sequentially superposed and gradually reduced layer by layer.

The stator positioning disc is of a three-stage hollow integral structure which is sequentially overlapped in a first stage, a second stage and a third stage and is gradually reduced layer by layer.

The utility model has the advantages of simple operation, greatly increasing the number of detected products, improving the efficiency of detection work, and quickly and accurately detecting the performance condition of the magnetic steel after the magnetizing of the stator magnetic steel.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a cross-sectional structure of a device for rapidly detecting a magnetic steel magnetic field of a motor stator of the present invention;

fig. 2 is the utility model relates to a motor stator magnet steel magnetic field short-term test device's chassis structure schematic diagram.

Fig. 3 is the utility model relates to a hollow main shaft section structure sketch map of motor stator magnet steel magnetic field short-term test device.

Fig. 4 is the utility model relates to a stator positioning disk section structure sketch map of motor stator magnet steel magnetic field short-term test device.

Fig. 5 is the schematic view of the sectional structure of the bearing bracket assembly of the device for rapidly detecting the magnetic field of the magnetic steel of the stator of the motor.

In the figure: 1. a chassis; 2. a hollow main shaft; 3. an epitrotor; 4. an iron core coil; 5. mounting holes; 6. an outgoing line; 7. a coil axis; 8. a fluxmeter; 9. a measured molecule magnetic steel; 12. fixing screw holes; 13. a wire passing groove; 21. a limiting disc; 22. threading holes; 31. a bearing bracket assembly; 32. a stator positioning plate; 33. a screw; 34. a bearing support plate; 35. a stent cavity; 36. a sliding bearing; 37. a ball bearing; 38. a puck cavity; 321. a first stage; 322. second-stage; 323. third-stage; 341. a bottom layer; 342. a middle layer; 343. and (4) an upper layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the invention. However, the technical solution claimed in the present invention can be realized without these technical details and various changes and modifications based on the following embodiments.

Referring to fig. 1-5, the utility model provides a quick detection device in motor stator magnet steel magnetic field, the device comprises chassis 1, hollow main shaft 2, external rotating body 3, iron core coil 4, lead-out wire 6, coil axis 7, fluxmeter 8, the son magnet steel 9 of being determined of drawing forth by iron core coil 4. Wherein, the chassis 1 is provided with a mounting hole 5 for mounting the hollow main shaft 2, a fixed screw hole 12 and a thread passing groove 13 with a bottom capable of passing a thread.

One end of the hollow main shaft 2 is fixedly screwed in the mounting hole 5 of the chassis 1, the end is provided with a limiting disc 21 which is contacted with the chassis 1, the hollow main shaft is hollow and is communicated up and down, and the other end is provided with a threading hole 22 which is communicated with the threading groove 13 to be penetrated by the leading-out wire 6.

The external rotary body 3 is composed of a bearing support assembly 31, a stator positioning disk 32 and a screw 33. Wherein the bearing bracket assembly 31 is composed of a bearing bracket disc 34, a sliding bearing 36 and a ball bearing 37. The bearing support disc 34 is a three-layer hollow integral structure with a bottom layer 341, a middle layer 342 and an upper layer 343 which are sequentially superposed and become smaller layer by layer, a support cavity 35 which is through from the bottom layer to the upper layer is arranged in the bearing support disc 34, a sliding bearing 36 and a ball bearing 37 are arranged in the support cavity 35, and the sliding bearing 36 and the ball bearing 37 are simultaneously sleeved on the hollow main shaft 2; the stator positioning disc 32 is also a three-stage hollow integral structure with a first-stage 321, a second-stage 322 and a third-stage 323 which are sequentially overlapped and gradually become smaller layer by layer, and a positioning disc cavity 38 which is communicated up and down is formed inside the stator positioning disc; the first stage 321 of the stator positioning disk 32 is sleeved on the third stage 343 of the bearing support disk 34 and is fixedly connected with the middle stage 342 of the bearing support disk 34 through the screw 33, so that the stator positioning disk 32 and the bearing support disk 34 are connected into a whole and can rotate around the hollow main shaft 2 through the sliding bearing 36 and the ball bearing 37.

The coil shaft 7 and the iron core coil 4 are fixedly connected into a whole, one end of the coil shaft 7 is fixedly connected with the other end of the hollow main shaft 2, and the lead-out wire 6 led out by the iron core coil 4 enters from the threading hole 22 of the hollow main shaft 2, passes through the hollow main shaft 2, enters the threading groove 13 and is connected with the fluxmeter 8.

The measured sub-magnetic steel 9 is movably sleeved at the other end of the coil shaft 7 and covers the iron core coil 5, and is clamped and fixed with the three stages 323 of the stator positioning disc 32, so that the measured sub-magnetic steel 9 and the external rotating body 3 are connected together and can rotate by taking the coil shaft 7 and the hollow main shaft 2 as axes.

When the magnetic flux meter works, the iron core coil 4 fixed on the coil shaft 7 and the hollow main shaft 2 do not rotate, the outer rotating body 3 rotates the measured sub-magnetic steel 9 which is clamped on the outer rotating body and is magnetized around the hollow main shaft 2 and the coil shaft 7 through the sliding bearing 36 and the ball bearing 37, so that induced current is generated in the iron core coil 4 fixed on the coil shaft 7 and is led into the magnetic flux meter 8 through the outgoing line 6, and the magnetic flux meter 8 generates readable data to enable a worker to judge whether a product is qualified or not, so that the purpose of rapid detection is achieved.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims

1. The utility model provides a quick detection device of motor stator magnet steel magnetic field which characterized in that: the device comprises a chassis provided with a hollow main shaft and a wire passing groove, an external rotating body sleeved outside the hollow main shaft and capable of rotating freely, a coil shaft fixedly provided with an iron core coil, a magnetic flowmeter connected with the iron core coil through a lead-out wire, and measured sub-magnetic steel.

2. The device for rapidly detecting the magnetic steel magnetic field of the motor stator according to claim 1, is characterized in that: the hollow main shaft is internally hollow and is communicated with the wire passing groove to allow the outgoing wire to pass through.

3. The device of claim 1, wherein a limiting plate is disposed at one end of the hollow spindle and contacts the chassis.

4. The apparatus according to claim 1, wherein the measured magnetic steel is movably sleeved on the other end of the coil shaft and then connected to the external rotator.

5. The device for rapidly detecting the magnetic steel magnetic field of the motor stator according to claim 1, wherein the external rotating body comprises a bearing support assembly which is hollow inside and provided with a sliding bearing and a ball bearing, and a stator positioning disc which is hollow in the middle and fixedly connected with the bearing support assembly through a screw.

6. The device of claim 5, wherein the bearing bracket assembly is a three-layer hollow integral structure with a bottom layer, a middle layer and an upper layer which are sequentially stacked and gradually reduced layer by layer.

7. The device for rapidly detecting the magnetic steel magnetic field of the motor stator as claimed in claim 5, wherein the stator positioning disk is a three-stage hollow integral structure with a first stage, a second stage and a third stage which are sequentially overlapped and gradually become smaller layer by layer.