A magnetic steel groove go-gauge detection device with a cover thickness detection function

Abstract

A kind of magnetic steel groove go gauge detection device with cover sheet thickness detection function, including rack, workbench, magnetic steel groove detection module installed on workbench, magnetic steel groove detection module includes the magnetic steel go gauge of detecting the size of magnetic steel groove with multiple magnetic steel gauge pieces, further include cover sheet thickness detection device installed on magnetic steel groove detection module, cover sheet thickness detection device includes the floating plate fixed below magnetic steel go gauge, the position limiting plate for limiting magnetic steel go gauge, multiple displacement sensors for detecting the moving distance of floating plate, multiple through holes corresponding with magnetic steel gauge piece are opened in position limiting plate, and magnetic steel gauge piece can be inserted into magnetic steel groove by passing through through hole. Through the linkage design of magnetic steel go gauge and floating plate, the synchronous detection of magnetic steel groove size and cover sheet thickness can be completed in single operation, the detection efficiency is improved, displacement sensor records the distance of pressing down in real time, the distance of pressing down of floating plate can be accurately measured, to judge the quality of rotor core.

Description

TECHNICAL FIELD

[0001] The present application relates to a magnetic steel slot gauge detection device with cover sheet thickness detection function. BACKGROUND

[0002] In the manufacturing process of new energy automobile drive motor, the quality control of rotor core is particularly critical. Among them, the stacking height precision of magnetic steel slot and the thickness of end cover sheet directly affect the electromagnetic performance and operation reliability of the motor.

[0003] The overall stacking height of a single-section rotor core is consistent. If two or more cover sheets are set, the depth of the magnetic steel slot will not be enough, resulting in the magnetic steel not being inserted to the bottom during subsequent installation, and problems in the assembly of the magnetic steel and the magnetic steel slot. Therefore, the number of cover sheets needs to be measured.

[0004] Currently, the detection of these two parameters is usually carried out in steps.

[0005] The traditional magnetic steel slot gauge detection device, such as the one described in patent number CN222938409U, uses a servo cylinder to drive the magnetic steel gauge to insert into the slot, and a pressure sensor to determine whether the slot width is qualified. However, this device can only detect the size of the magnetic steel slot and cannot simultaneously determine the thickness of the cover sheet. When the cover sheet is mistakenly installed as double-layer, the device cannot recognize it, resulting in air gap magnetic field distortion after rotor assembly. Moreover, the detection result of this device depends on the spring pressure threshold, and long-term use of the elastic element will cause fatigue and increase the misjudgment rate.

[0006] The existing cover sheet thickness detection is usually measured by manual use of a micrometer to measure the thickness of the cover sheet stack, which is inefficient. There are also image measuring instruments that can achieve non-contact measurement, but the equipment cost is high, the detection speed is slow, and it cannot be linked with the gauge detection station.

[0007] Therefore, it is a market demand to design a magnetic steel slot gauge detection device with cover sheet thickness detection function, which can measure the thickness of the cover sheet while retaining the magnetic steel slot gauge detection function, and achieve integrated detection. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a magnetic steel slot gauge detection device with cover sheet thickness detection function.

[0009] In order to solve the above technical problems, the technical scheme adopted by the present application is: a magnetic steel slot go-gauge detection device with cover sheet thickness detection function, comprising a rack, a workbench, a magnetic steel slot detection module mounted on the workbench, the magnetic steel slot detection module comprises a magnetic steel go-gauge body with a plurality of magnetic steel gauges for detecting the size of the magnetic steel slot, and further comprises a cover sheet thickness detection device mounted on the magnetic steel slot detection module, the cover sheet thickness detection device comprises a floating plate fixed below the magnetic steel go-gauge body, a limiting plate for limiting the position of the magnetic steel go-gauge body, and a plurality of displacement sensors for detecting the moving distance of the floating plate, a plurality of through holes corresponding to the magnetic steel gauges are formed in the limiting plate, and the magnetic steel gauges can be inserted into the magnetic steel slot through the through holes.

[0010] In some embodiments, the magnetic steel slot detection module further comprises a pressing structure for pressing the rotor core, the pressing structure comprises a rotor pressing plate and a pressing cylinder for controlling the descent of the rotor pressing plate, and the limiting plate can limit the descent of the rotor pressing plate.

[0011] In some embodiments, the magnetic steel go-gauge body further comprises a go-gauge seat, and a plurality of the magnetic steel gauges are uniformly distributed on the go-gauge seat and integrally formed upward from the go-gauge seat.

[0012] In some embodiments, the go-gauge seat and the floating plate are fixed by a plurality of support columns, a fixed plate fixed to the rack is arranged between the go-gauge seat and the floating plate, a plurality of through holes are formed in the fixed plate, and the plurality of support columns pass through the plurality of through holes one by one.

[0013] In some embodiments, a plurality of elastic members are connected between the fixed plate and the magnetic steel go-gauge body, and the elastic force of the plurality of elastic members can make the magnetic steel gauges have a tendency to be inserted into the magnetic steel slot.

[0014] In some embodiments, a rotary positioning mechanism is further included, the rotary positioning mechanism comprises an inner support clamp jaw fixed to the output end of the pressing cylinder and a hollow rotary platform for controlling the rotation of the inner support clamp jaw, the rotor core can be sleeved and fixed on the inner support clamp jaw, and the hollow rotary platform drives the inner support clamp jaw to rotate to perform multi-angle detection.

[0015] In some embodiments, a workbench module is further included, the workbench module comprises the workbench, a jacking cylinder for controlling the lifting of the workbench, and a pressure sensor arranged below the workbench and connected with the jacking cylinder.

[0016] In some embodiments, a control unit connected with the displacement sensors is further included, and the control unit calculates the number of cover sheets by the formula: (rotor core thickness - downward moving distance) / single cover sheet thickness.

[0017] In some implementations, the control unit determines the product as defective when it detects that the number of cover plates is ≥2.

[0018] The scope of this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0019] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: The present invention provides a magnetic steel groove gauge detection device with cover plate thickness detection function. Through the linkage design of the magnetic steel gauge body and the floating plate, the magnetic steel groove size and cover plate thickness can be detected simultaneously in a single operation, improving detection efficiency. The displacement sensor records the pressing distance in real time, which can accurately measure the pressing distance of the floating plate, thereby judging the quality of the rotor core. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0023] Figure 4 Schematic diagram of rotor core (without cover plate);

[0024] Figure 5 Schematic diagram of rotor core (with cover plate);

[0025] The components include: 1. Frame; 2. Workbench module; 21. Workbench; 22. Lifting electric cylinder; 23. Pressure sensor; 3. Magnet slot detection module; 31. Magnet gauge body; 311. Magnet gauge plate; 312. Gauge seat; 32. Pressing structure; 321. Rotor pressure plate; 322. Pressing cylinder; 33. Pressing electric cylinder; 4. Cover plate thickness detection device; 41. Floating plate; 42. Limiting plate; 421. Through hole; 43. Displacement sensor; 5. Support column; 6. Fixing plate; 7. Elastic element; 8. Rotary positioning mechanism; 81. Inner support gripper; 82. Hollow rotating platform. Detailed Implementation

[0026] like Figures 1-3 The magnetic steel channel gauge testing device shown includes a frame 1, a workbench module 2, a magnetic steel channel testing module 3, and a cover thickness testing device 4.

[0027] As shown in Figure 1 , the workbench module 2 includes a workbench 21, a jacking cylinder 22 for controlling the lifting of the workbench 21, and a pressure sensor 23 arranged below the workbench 21 and connected to the jacking cylinder 22.

[0028] The magnetic steel slot detection module 3 includes a pressing structure 32 for pressing the rotor core, a pressing cylinder 33 for driving the pressing structure 32 to lift, and a magnetic steel gauge 31 for detecting the size of the magnetic steel slot.

[0029] As shown in Figure 2 , the magnetic steel gauge 31 includes a gauge seat 312 and a plurality of magnetic steel gauge pieces 311 integrally formed on the gauge seat 312 and extending upward from the gauge seat 312. In this embodiment, there are 12 magnetic steel gauge pieces 311, and the number of magnetic steel gauge pieces 311 can be determined according to the size of the rotor core.

[0030] In this embodiment, a rotor core as shown in Figures 4-5 is used.

[0031] The magnetic steel gauge piece 311 and the gauge seat 312 are integrally formed, and when the specification is changed, only the locking nut on the support column needs to be removed, greatly reducing the changeover time.

[0032] As shown in Figure 2 , the cover thickness detection device 4 is installed on the magnetic steel slot detection module 3, and the cover thickness detection device 4 includes a floating plate 41 fixed below the magnetic steel gauge 31, a limiting plate 42 for limiting the position of the magnetic steel gauge 31, and four displacement sensors 43 for detecting the movement distance of the floating plate 41. The limiting plate 42 has 12 through holes 421 corresponding to the magnetic steel gauge pieces 311, and the magnetic steel gauge pieces 311 can pass through the through holes 421 and be inserted into the magnetic steel slot.

[0033] As shown in Figure 3 , the pressing structure 32 includes a rotor pressing plate 321 and a pressing cylinder 322 for controlling the descent of the rotor pressing plate 321, and the limiting plate 42 can limit the descent of the rotor pressing plate 321.

[0034] The gauge seat 312 and the floating plate 41 are fixed by a plurality of support columns 5, and between the gauge seat 312 and the floating plate 41 there is a fixed plate 6 fixed to the rack 1, the fixed plate 6 has a plurality of through holes, and the plurality of support columns 5 pass through the plurality of through holes one by one.

[0035] Four elastic members 7 are connected between the fixed plate 6 and the magnetic steel gauge 31, and the elastic force of the four elastic members 7 can make the magnetic steel gauge pieces 311 have the tendency to be inserted into the magnetic steel slot. In this embodiment, the elastic members 7 are springs, and there are four of them.

[0036] The magnetic steel slot go-gauge detection device further comprises a rotary positioning mechanism 8, which comprises an inner support clamp jaw 81 fixed to the output end of the downward pressing cylinder 322, a hollow rotary platform 82 for controlling the rotation of the inner support clamp jaw 81, and the rotor core can be sleeved and fixed on the inner support clamp jaw 81, and the hollow rotary platform 82 drives the inner support clamp jaw 81 to rotate to perform multi-angle detection. The secondary detection is performed through the rotary positioning mechanism 30°, and the two times of displacement data are cross-verified to reduce the missed detection rate.

[0037] Working principle: the carrying module carries the rotor core to be detected to the magnetic steel slot go-gauge test station and fixes it on the inner support clamp jaw 81. The lifting cylinder drives the workbench 21 to rise until the magnetic steel gauge sheet 311 passes through the through hole 421 of the limiting plate 42, and the go-gauge seat 312 is abutted against the lower surface of the limiting plate 42. At this time, the top end of the magnetic steel gauge sheet 311 is at least one rotor core thickness higher than the upper surface of the limiting plate 42. At this time, the pressure sensor 23 senses the pressure and stops rising.

[0038] At the same time, the downward pressing cylinder 33 drives the downward pressing structure 32 to descend, so that the magnetic steel gauge sheet 311 is inserted into the magnetic steel slot of the rotor core, and whether the size of the magnetic steel slot meets the requirements is measured.

[0039] With the gradual descent of the rotor core, until the top end of the magnetic steel gauge sheet 311 is abutted against the cover sheet on the top of the rotor core due to the upward abutment of the four elastic members 7, the downward pressing cylinder 322 drives the rotor pressing plate 321 to descend, the rotor pressing plate 321 presses the rotor core to continue to descend, and then the floating plate 41 descends because it is fixedly connected with the go-gauge seat of the magnetic steel go-gauge body 31 through the support column 5. The displacement sensor 43 is arranged below the floating plate 41 to measure the descending distance of the floating plate 41, until the rotor core is pressed to the limiting plate 42 and stops descending. The descending distance of the floating plate 41 measured by the displacement sensor 43 is the length of the magnetic steel slot. The thickness of the rotor core is known, and the number of cover sheets can be calculated by the thickness of the rotor core-subtracted distance / thickness of a single cover sheet. In the embodiment, the thickness of a single cover sheet is 0.3 mm, and the control unit determines that the product is a defective product when the number of cover sheets is greater than or equal to 2.

[0040] After the measurement, the lifting cylinder drives the workbench 21 to descend, so that the magnetic steel gauge sheet 311 is withdrawn from the magnetic steel slot of the rotor core. The downward pressing structure descends to fix the rotor core on the inner support clamp jaw 81 again. The product is rotated 30° through the rotary positioning mechanism 8 and measured again. If the product is not defective after the two times of detection, it is determined that the product is a defective product.

[0041] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A magnetic steel slot go-gauge detection device with a cover sheet thickness detection function, comprising a rack (1), a workbench (21), and a magnetic steel slot detection module (3) mounted on the workbench (21), wherein the magnetic steel slot detection module (3) comprises a magnetic steel go-gauge body (31) with a plurality of magnetic steel gauges (311) for detecting the size of a magnetic steel slot, characterized in that, The cover thickness detection device (4) is arranged on the magnetic steel groove detection module (3), and the cover thickness detection device (4) comprises a floating plate (41) fixed below the magnetic steel gauge body (31), a limiting plate (42) for limiting the position of the magnetic steel gauge body (31), and a plurality of displacement sensors (43) for detecting the moving distance of the floating plate (41), a plurality of through holes (421) corresponding to the magnetic steel gauge pieces (311) are arranged on the limiting plate (42), and the magnetic steel gauge pieces (311) can be inserted into the magnetic steel groove through the through holes (421).

2. The magnetic steel groove go-gauge detection device with the cover sheet thickness detection function according to claim 1, characterized in that: The magnetic steel groove detection module (3) further comprises a pressing structure (32) for pressing the rotor core and a pressing cylinder (33) for driving the pressing structure (32) to move up and down, the pressing structure (32) comprises a rotor pressing plate (321) and a pressing cylinder (322) for controlling the descent of the rotor pressing plate (321), and the limiting plate (42) can limit the descent of the rotor pressing plate (321).

3. The magnetic steel groove go-gauge detection device with the cap sheet thickness detection function according to claim 1, characterized in that: The magnetic steel gauge body (31) further comprises a gauge seat (312), and a plurality of magnetic steel gauge pieces (311) are uniformly distributed on the gauge seat (312) and integrally formed to protrude upward from the gauge seat (312).

4. The magnetic steel groove go-gauge detection device with the cover sheet thickness detection function according to claim 3, characterized in that: The gauge seat (312) and the floating plate (41) are fixed by a plurality of support columns (5), and a fixing plate (6) fixed to the rack (1) is arranged between the gauge seat (312) and the floating plate (41), a plurality of through holes are arranged on the fixing plate (6), and the plurality of support columns (5) pass through the plurality of through holes one by one.

5. The magnetic steel groove go-gauge detection device with the cover sheet thickness detection function according to claim 4, characterized in that: The fixing plate (6) and the magnetic steel gauge body (31) are connected by a plurality of elastic members (7), and the elastic force of the plurality of elastic members (7) can make the magnetic steel gauge pieces (311) have a tendency to be inserted into the magnetic steel groove.

6. The magnetic steel groove go-gauge detection device with the cover sheet thickness detection function according to claim 2, characterized in that: The rotating positioning mechanism (8) comprises an inner supporting clamp jaw (81) fixed to the output end of the pressing cylinder (322) and a hollow rotating platform (82) for controlling the rotation of the inner supporting clamp jaw (81), the rotor core can be sleeved and fixed on the inner supporting clamp jaw (81), the rotor pressing plate (321) is located above the inner supporting clamp jaw (81), and the hollow rotating platform (82) drives the inner supporting clamp jaw (81) to rotate to perform multi-angle detection.

7. The magnetic steel groove go-gauge detection device with the cap thickness detection function according to claim 1, characterized in that: The workbench module (2) comprises the workbench (21), a jacking cylinder (22) for controlling the lifting of the workbench (21), and a pressure sensor (23) arranged below the workbench (21) and connected with the jacking cylinder (22).

8. The magnetic steel groove go-gauge detection device with the cap sheet thickness detection function according to claim 1, characterized in that: The control unit is connected with the displacement sensor (43), the top end of the magnetic steel gauge piece (311) is higher than the upper surface of the limiting plate (42) by a distance of a thickness of a rotor core, and the control unit calculates the number of covers by the formula: (rotor core thickness - downward moving distance) / single cover thickness.

9. The magnetic steel groove go-gauge detection device with the cover sheet thickness detection function according to claim 8, characterized in that: The control unit determines that the product is a defective product when the number of covers is greater than or equal to 2.

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