阅读说明：本技术 一种磁瓦测试装置及方法 (Magnetic shoe testing device and method ) 是由 杨跃红 何震宇 卢晓强 黄华为 张筝 吴赛航 于 2020-06-08 设计创作，主要内容包括：本发明公开了一种磁瓦测试装置,包括无磁材质制成的基座、检测铁芯和机壳,其特征是,还包括定位卡环,所述定位卡环包括呈空心圆柱状的卡环主体和由所述卡环主体顶部沿卡环主体轴向延伸出的四个限位爪,所述的四个限位爪两两成对形成两组限位爪组,两组限位爪组相对布置,同一限位爪组的两个限位爪和卡环主体顶面之间形成用于卡紧放置待测磁瓦的定位口,所述定位口的内侧壁所在的平面穿过所述卡环主体的中心线,所述卡环主体的外径与所述机壳的内径相同。具有不仅能够准确简便的对磁瓦进行定位,而且定位夹具的工作面加工简单、方便,可有效提高磁瓦的定位准确度的特点。(The invention discloses a magnetic tile testing device which comprises a base made of a non-magnetic material, a detection iron core and a machine shell and is characterized by further comprising a positioning clamping ring, wherein the positioning clamping ring comprises a hollow cylindrical clamping ring main body and four limiting claws axially extending from the top of the clamping ring main body, the four limiting claws form two groups of limiting claw groups in pairs, the two groups of limiting claw groups are oppositely arranged, a positioning opening used for clamping and placing a magnetic tile to be tested is formed between the two limiting claws of the same limiting claw group and the top surface of the clamping ring main body, the plane where the inner side wall of the positioning opening is located penetrates through the central line of the clamping ring main body, and the outer diameter of the clamping ring main body is the same as the inner diameter of the machine shell. The positioning fixture has the characteristics that the magnetic shoe can be accurately and simply positioned, the working surface of the positioning fixture is simple and convenient to process, and the positioning accuracy of the magnetic shoe can be effectively improved.)

1. The utility model provides a magnetic shoe testing arrangement, includes base, detection iron core and the casing that no magnetism material was made, characterized by still includes the location snap ring, the location snap ring including be hollow cylindric snap ring main part and by four spacing claws that snap ring main part top extended along snap ring main part axial, two liang of spacing claws form two sets of spacing claw groups in pairs, two sets of spacing claw group mutual dispositions, form the location mouth that is used for the chucking to place the magnetic shoe that awaits measuring between two spacing claws of same spacing claw group and the snap ring main part top surface, the plane at the inside wall place of location mouth passes the central line of snap ring main part, the external diameter of snap ring main part with the internal diameter of casing is the same.

2. The magnetic tile testing device as claimed in claim 1, wherein the top end of the side wall of the positioning opening is provided with a taper angle.

3. A magnetic tile testing device according to claim 2, wherein the angle of said taper is in the range of 3-5 degrees.

4. A magnetic tile testing device according to claim 1, 2 or 3, further comprising a fixing clamping strip, wherein the fixing clamping strip is in a wedge-shaped strip shape and is embedded between the magnetic tile to be tested and the inner side wall of the positioning opening.

5. A magnetic tile testing device as claimed in claim 4, wherein the thick end of said positioning strip is provided with a force block.

6. The magnetic tile testing device as claimed in claim 4, wherein the width of the fixing clip strip is consistent with the width of the limiting jaw along the radial direction of the clip main body.

7. The magnetic tile testing device of claim 1, wherein the base is provided with a lifting device, the lifting device comprises a lifting block, a guide rail, a transmission device and a manual adjuster, the guide rail is arranged along the height direction of the detection iron core by the base, the manual adjuster controls the position of the guide rail on the lifting block through the transmission device, and the lifting block is used for driving the positioning clamp ring to move up and down along the detection iron core.

8. A magnetic shoe testing method is characterized by comprising the following steps:

the method comprises the following steps: respectively placing two magnetic tiles to be tested into two positioning openings of the positioning snap ring, wherein the bottom surfaces of the two magnetic tiles to be tested are completely attached to the bottom surface of the positioning opening;

step two: respectively attaching the two magnetic tiles to be tested by taking two side walls of the two positioning openings which are arranged in a diagonal manner as a reference, and aligning the two magnetic tiles to be tested along the periphery of the clamp ring body;

step three: inserting a fixed clamping strip between the magnetic shoe to be tested and the non-reference side wall of the corresponding positioning opening;

step four: sleeving the shell on one end of the combined body obtained in the step three, wherein the end is provided with the magnetic shoe to be detected;

step five: sleeving the combined body obtained in the step four on the detection iron core;

step six: and adjusting the height of the positioning snap ring until the magnetic flux shows the maximum value.

Technical Field

The invention relates to the field of magnetic shoe magnetic flux detection, in particular to a magnetic shoe testing device and method.

Background

At present, ferrite magnetic shoes are widely applied to the fields of automobiles, motorcycles, household appliances, electric tools, fitness equipment and the like, and are particularly widely used as important functional devices of automobile motors and direct-current variable frequency motors.

The magnetic flux detection of the magnetic shoe is one of key steps in the production process of the magnetic shoe and is used for screening out unqualified magnetic flux products of the magnetic shoe so as to avoid causing the quality problem of final products. As shown in fig. 5, the testing device comprises a base 1, a detecting iron core 2 as a stator and a casing 3, wherein the base is provided with a lead connecting end, the lead connecting end of the base is firstly communicated with a digital magnetic flux meter through two leads to be powered on during testing, a magnetized magnetic shoe and a corresponding casing component are inserted from the upper part of the stator, the number of magnetic lines of force passing through the stator is changed when the magnetic shoe casing component is inserted or taken out so as to generate induced current, the induced current flows through the digital magnetic flux meter connected with the induced current, and thus a reading can be displayed, and different values of magnetic lines of force can be displayed when different numbers of magnetic lines of force are changed. The more the number of the magnetic lines changed under the same test condition, the larger the value is shown. Different combinations of a pair of magnetic shoes and the same housing will exhibit different values of magnetic flux lines passing through the coil when inserted or removed from the stator assembly. Under the same test condition, the more the number of the changed magnetic lines of force is, the larger the displayed value is, the better the performance of the magnetic shoe is. And comparing the displayed numerical value with the standard value to know whether the performance of each group of the detected magnetic shoes is qualified or not. And after the test is finished, taking out the magnetic shoe to be tested from the shell, and replacing the magnetic shoe to be tested with another pair of magnetic shoes to be tested for testing. However, two requirements must be satisfied in the process of testing the magnetic flux of the magnetic shoes, and the heights of the first pairs of magnetic shoes from the bottom of the machine shell are equal when testing; the second two magnetic tiles to be tested must be filled in the equal height and opposite positions of the inner wall of the shell. Therefore, when the magnetized two magnetic tiles and the shell are combined into the magnetic tile and shell assembly, the magnetized two magnetic tiles are firstly positioned and clamped on the inner wall of the special shell, so that the phenomenon that the magnetized magnetic tiles are adsorbed on the stator when the magnetic tile and shell assembly is inserted into the stator, and the accuracy of a test result cannot be tested or is influenced can be avoided. In the actual operation process, quick-drying glue is usually dripped for solidification and positioning, and the quick-drying glue is dripped for solidification and positioning, so that the inconvenience exists, for example, the positioning accuracy is not high, the positioning of the magnetic shoe is easy to move in the glue dripping process, the positioning reference is lacked, the magnetic shoe is not easy to judge right, and the position of the magnetic shoe is inaccurate; and after the first magnetic shoe shell assembly is tested, the outer wall of the shell is knocked by a hard object, and the magnetic shoe can fall off from the inner wall of the shell under the action of external force knocking. Sometimes, if glue is added slightly carelessly, the magnetic shoe cannot fall off from the inner wall of the shell only by knocking the outer wall of the shell, so that the magnetic shoe cannot fall off even if being directly knocked by hard objects, and sometimes, the magnetic shoe cannot fall off even if being directly knocked by force and can be directly knocked by strong force, and the magnetic shoe can be broken and broken. The magnetic fragments are easily scattered on the inner wall of the magnetic conductive shell, and the time consumption is increased during cleaning. After the magnetic fragments on the inner wall of the shell are cleaned, the hardened glue on the inner wall of the shell is cleaned, the hardened glue is thin and hard, and can only be scraped by saw blades or polished by abrasive paper, so that the cleaning is extremely difficult and time-consuming. Only after the inner wall of the shell is completely cleaned, the next pair of magnetic tiles to be tested can be filled for continuous testing. Therefore, a specially designed clamping ring is needed for fixing and positioning to perform testing, most of the existing positioning fixtures use the original arc surface of the magnetic shoe as a working surface, so that the working surface of the positioning fixture is relatively complex, the machining precision is difficult to control, and the positioning accuracy of the fixture is good and uneven.

For example, chinese patent publication No. CN205193252U, published 2015, 11/25/the invention provides a magnetic flux testing and positioning tool for permanent magnetic ferrite magnetic shoes, which includes a circular table block, wherein a longitudinal rotor positioning through hole is formed in the center of the circular table block, a casing positioning ring is disposed on the upper surface of the circular table block, and the central axis of the casing positioning ring coincides with the central axis of the rotor positioning through hole. The positioning device of this application adopts the arc surface as the working face, and when being applied to in the middle of the casing magnetic shoe sub-assembly detects, when putting the magnetic shoe that awaits measuring into the casing, can't realize positive phase relative positioning, takes place offset simultaneously easily, so it also has above-mentioned not enough.

Disclosure of Invention

The invention aims to solve the problems of inaccurate positioning of a magnetic shoe, difficult positioning and complex machining of a working surface of a positioning clamp of a magnetic shoe testing device in the prior art, and provides a magnetic shoe testing device and a method which can accurately, simply and conveniently position the magnetic shoe, can simply and conveniently machine the working surface of the positioning clamp and can effectively improve the positioning accuracy of the magnetic shoe.

The technical scheme of the invention is as follows:

the utility model provides a magnetic shoe testing arrangement, includes base, detection iron core and the casing that no magnetism material was made, still includes the location snap ring, the location snap ring including be hollow cylindric snap ring main part and by four spacing claws that snap ring main part top extended along snap ring main part axial, two liang of spacing claws form two sets of spacing claw groups in pairs, two sets of spacing claw group mutual disposition, form the location mouth that is used for the chucking to place the magnetic shoe that awaits measuring between two spacing claws of same spacing claw group and the snap ring main part top surface, the plane at the inside wall place of location mouth passes the central line of snap ring main part, the external diameter of snap ring main part with the internal diameter of casing is the same.

Because adopted the location snap ring to fix a position the magnetic shoe that awaits measuring in this scheme, compare in the positioning accuracy who adopts quick-drying glue and obtained huge promotion, in this scheme, the location snap ring including be hollow cylindric snap ring main part and by four spacing claws that snap ring main part top extended along snap ring main part axial, two liang of spacing claws form two sets of spacing claw groups in pairs, two sets of spacing claw groups are just to arranging, form the location mouth that is used for the chucking to place the magnetic shoe that awaits measuring between two spacing claws of same spacing claw group and the snap ring main part top surface, the plane at the inside wall place of location mouth passes the central line of snap ring main part, the external diameter of snap ring main part with the internal diameter of casing is the same. The working face of location snap ring is the bottom surface and the side of location mouth in fact, and two magnetic shoe location that await measuring all only need use the bottom surface and one of them side at the location mouth at its place to closely laminate as the benchmark, and the bottom surface external diameter of location mouth aligns with the magnetic shoe external diameter that awaits measuring, and wherein, the condition that still need satisfy is that the lateral wall of two location mouths as the benchmark is around the central line axis symmetric arrangement of snap ring main part, and two spacing claws that both diagonal arranged provide the lateral wall of location mouth. The height of the positioning holes is consistent on the top surface of the same hollow cylinder, the requirement of the same height is met, two corresponding positioning holes formed by two groups of limit claw groups which are arranged oppositely are centrosymmetric, one positioning hole is overlapped after rotating 180 degrees around the central line of the clamp ring main body, therefore, the side walls of two different positioning holes which are used as a reference are required to be arranged symmetrically around the central line of the clamp ring main body, and the outer diameter of the bottom surface of the positioning hole is aligned with the outer diameter of the magnetic shoe to be detected (a fan ring is mostly adopted in the processing and production process of the magnetic shoe, the magnetic shoe is finally fixed on the machine shell, the outer diameter of the magnetic shoe is the same as the inner diameter of the machine shell, the outer diameter of the positioning clamp ring is also the same as the inner diameter of the machine shell, so the magnetic shoe is consistent with the outer diameter of the positioning clamp ring and can be aligned certainly, the method is simple to operate, the working surface is a plane, the machining precision is far higher than that of a curved surface, the curved surface is not easy to deform, and the positioning accuracy of the magnetic shoe can be effectively improved.

Preferably, the top end of the side wall of the positioning opening is provided with a withdrawing bevel angle. And the magnetic shoe to be tested can be conveniently pulled out by arranging the withdrawing mechanism.

Preferably, the angle range of the taper angle is 3-5 degrees.

Preferably, the positioning device is characterized by further comprising a fixing clamping strip, wherein the fixing clamping strip is in a wedge-shaped strip shape and is embedded between the magnetic shoe to be detected and the inner side wall of the positioning opening. Because there is the magnetic shoe of only arc length difference to produce in process of production, when the arc length difference of magnetic shoe is less, redesign preparation location snap ring seems comparatively loaded down with trivial details, consequently adopt the fixing clip strip, insert between the space of lateral wall and the magnetic shoe that awaits measuring, owing to only need a lateral wall as the reference surface, so can insert the fixing clip strip at non-reference face side, realize the function of chucking magnetic shoe that awaits measuring with the assistance-localization real-time mouth, on the other hand adopts wedge-shaped fixing clip strip can make the magnetic shoe that awaits measuring in the testing process difficult not hard up with the complete chucking of location mouth, the location is comparatively accurate.

Preferably, the thick end of the positioning clamping strip is provided with a force application block. The forcing block is convenient for pulling out the fixing clamping strip.

Preferably, the width of the fixing clamping strip is consistent with the width of the limiting claw along the radial direction of the clamping ring main body. The design is convenient for clamping, the contact surfaces of the fixing clamping strips, the limiting claws and the magnetic shoe to be tested are large, the stress is balanced, and the magnetic shoe to be tested and the limiting claws are not easy to wear.

Preferably, be equipped with elevating gear on the base, elevating gear includes elevator, guide rail, transmission and manual regulation ware, and the guide rail is arranged along detecting the iron core direction of height by the base, the position on the guide rail on the manual regulation ware passes through transmission control elevator, the elevator is used for driving the location snap ring and reciprocates along detecting the iron core.

Because need remove the magnetic shoe that awaits measuring in the test procedure and adjust it to the maximum position of magnetic flux, under the normal conditions directly with the hand removal location snap ring in order to adjust its position, however, with the degree of accuracy of hand not high to troublesome poeration adopts elevating gear to go up and down to the location snap ring, adjusts with manual regulator, convenient operation and precision are higher.

A magnetic tile testing method comprises the following steps:

the method comprises the following steps: respectively placing two magnetic tiles to be tested into two positioning openings of the positioning snap ring, wherein the bottom surfaces of the two magnetic tiles to be tested are completely attached to the bottom surface of the positioning opening;

step two: respectively attaching the two magnetic tiles to be tested by taking two side walls of the two positioning openings which are arranged in a diagonal manner as a reference, and aligning the two magnetic tiles to be tested along the periphery of the clamp ring body;

step three: inserting a fixed clamping strip between the magnetic shoe to be tested and the non-reference side wall of the corresponding positioning opening;

step four: sleeving the shell on one end of the combined body obtained in the step three, wherein the end is provided with the magnetic shoe to be detected;

step five: sleeving the combined body obtained in the step four on the detection iron core;

step six: and adjusting the height of the positioning snap ring until the magnetic flux shows the maximum value.

The invention has the beneficial effects that: the positioning fixture not only can accurately and simply position the magnetic shoe, but also has simple and convenient processing of the working surface, and can effectively improve the positioning accuracy of the magnetic shoe.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

FIG. 2 is a schematic view of a retaining snap ring of the present invention.

Fig. 3 is a top view of the retaining snap ring of the present invention.

FIG. 4 is a diagram illustrating the state of the magnetic shoe under test according to the present invention.

Fig. 5 is a schematic structural diagram of a magnetic tile testing device in the prior art.

In the figure: the magnetic shoe detection device comprises a base 1, a detection iron core 2, a machine shell 3, a positioning clamping ring 4, a clamping ring main body 41, a limiting claw 42, a positioning opening 43, a fixing clamping strip 5, an acting block 51 and a magnetic shoe 6 to be detected.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings: