A new detection device for rotor core magnetic slot

Abstract

This invention discloses a novel detection device for rotor core magnetic slots, comprising a bottom plate and a top plate arranged parallel to each other. The bottom plate has several through holes, through which a magnetic slot detection mechanism for detecting rotor core magnetic slots is inserted. The magnetic slot detection mechanism includes a base fixed to the top surface of the bottom plate, on which a vertical magnetic slot gauge is mounted via a sliding assembly. The magnetic slot gauge passes through the through holes in the bottom plate and can move freely within them. The center of the bottom plate and the top plate are connected by a connecting column. Several fixed plates, each corresponding to a magnetic slot detection mechanism, are arranged on the bottom surface of the top plate. Sensors for detecting changes in the position of the magnetic slot gauges are mounted on the fixed plates. This invention allows for flexible floating within a certain space, avoiding the influence of deviations between the detection mechanism and the product's placement position, objectively and accurately reflecting the state of the product's magnetic slots, and solving the problems of high misjudgment rate and frequent incorrect judgments.

Description

Technical Field

[0001] This invention relates to the field of manufacturing and testing technology of core components for drive motors of new energy electric vehicles, specifically to a testing device for the magnetic slots of the rotor core in a drive motor of a new energy electric vehicle. Background Technology

[0002] In the new energy field, drive motors are one of the core components, and the manufacturing process of the rotor core is indispensable. After the rotor core is stamped, key dimensions need to be inspected. In mass production, the conventional practice is to pass the stamped rotor core through an automatic inspection mechanism to complete various inspection indicators, and the inspection of the magnetic slots of the rotor core is one of these steps.

[0003] The magnetic slot inspection involves inserting a caliper of a specific size directly into the magnetic slot of the rotor core. The primary function is to detect any abnormal blockages within the slot and to verify the slot dimensions. If the slot size is smaller than the specified value or if there is an internal blockage, the caliper cannot pass through smoothly, indicating an abnormal state, and the product is deemed defective. The design of the caliper in the automatic inspection mechanism must consider the influence of product position, requiring a certain amount of float to meet the needs of batch inspection. Previous caliper inspection mechanisms lacked sufficient float flexibility. Sometimes, even if the magnetic slot of a product was clear, the placement of products in a batch could not be perfectly uniform, causing the caliper to fail to align. This resulted in a diagonal force acting inside the magnetic slot, causing the caliper to jam and leading to the system classifying it as defective, resulting in false alarms during batch production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a novel detection device for rotor core magnetic slots, which can float flexibly within a certain space, avoid the influence of the deviation between the detection mechanism and the product placement position, and solve the problems of high misjudgment rate and frequent incorrect judgment.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows.

[0006] A novel detection device for rotor core magnetic slots includes a base plate and a top plate arranged parallel to each other. The base plate has several through holes, through which a magnetic slot detection mechanism for detecting rotor core magnetic slots is inserted. The magnetic slot detection mechanism includes a base fixed to the top surface of the base plate. A vertical magnetic slot gauge is mounted on the base via a sliding assembly. The magnetic slot gauge passes through the through holes in the base plate and can move freely within them. The center of the base plate and the top plate are connected by a connecting column. Several fixing plates, each corresponding to a magnetic slot detection mechanism, are arranged on the bottom surface of the top plate. Sensors for detecting changes in the position of the magnetic slot gauges are mounted on the fixing plates.

[0007] The above-mentioned novel detection device for rotor core magnetic slots has a vertical straight slot on the upper part of the magnetic slot gauge. The magnetic slot gauge is connected to a sliding assembly on the base by a fixing bolt passing through the straight slot. The head width of the fixing bolt located outside the magnetic slot gauge is greater than the width of the straight slot on the magnetic slot gauge. The stud part of the fixing bolt is slidably fitted with the straight slot on the magnetic slot gauge.

[0008] The novel detection device for rotor core magnetic slots described above has chamfers at both ends of the bottom of the magnetic slot gauge to facilitate vertical insertion into the rotor core magnetic slots.

[0009] The novel detection device for the magnetic slots of the rotor core described above has a sensing rod on the top of the magnetic slot gauge that corresponds to the sensor on the fixed plate.

[0010] The aforementioned novel detection device for rotor core magnetic slots includes a square protrusion at the upper center of the base, with several bolt through holes on both sides of the square protrusion, and two horizontally parallel base through holes in the square protrusion. The sliding assembly includes a slidingly assembled convex slider and a concave slider. The bottom of the convex slider has an upward-facing groove, and two sliding shafts passing through the base through holes on the inner wall of the groove at the bottom of the convex slider are provided, which can slide along the base through holes. The concave slider is inverted on a convex block at the top of the convex slider. The convex block of the convex slider has two horizontally parallel convex slider through holes that are perpendicular to the base through holes, and two sliding shafts passing through the convex slider through holes are provided on the inner wall of the groove at the bottom of the concave slider. The magnetic slot gauge is connected to the outer end face of the concave slider by fixing bolts.

[0011] In the novel detection device for rotor core magnetic slots described above, the base and the convex slider, as well as the convex slider and the concave slider, are all stacked in a cross shape; the length of the sliding shaft of the convex slider is greater than the length of the through hole of the base, and the length of the sliding shaft of the concave slider is greater than the length of the through hole of the convex slider.

[0012] The novel detection device for the magnetic groove of the rotor core described above has screws protruding outward on the top side of the magnetic groove gauge and the side end face of the concave slider that contacts the magnetic groove gauge, and a spring that drives the magnetic groove gauge to rebound is connected between the two screws.

[0013] Due to the adoption of the above technical solutions, the technical progress achieved by this invention is as follows.

[0014] This invention provides a novel detection device for rotor core magnetic slots, which can flexibly float within a certain space, avoiding the influence of deviation between the detection mechanism and the product placement position, objectively and truthfully reflecting the state of the product's magnetic slots, solving the problems of high false judgment rate and frequent incorrect judgments, thereby reducing the false alarm rate of the detection mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the single magnetic groove detection mechanism of the present invention;

[0017] Figure 3 This is a schematic diagram of the assembly of the slider mechanism described in this invention;

[0018] Figure 4 This is a schematic diagram of the convex slider in the slider mechanism described in this invention;

[0019] Figure 5 This is a schematic diagram of the concave slider in the slider mechanism of the present invention;

[0020] Figure 6 This is a schematic diagram of the base in the slider mechanism of the present invention.

[0021] The components are: 1. base, 2. convex slider, 3. concave slider, 4. magnetic groove gauge, 5. fixing bolt, 6. sensing rod, 7. spring, 8. sensor, 9. base plate, 10. top plate, 11. fixing plate, 12. convex slider sliding shaft, 13. concave slider sliding shaft. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] A novel detection device for rotor core magnetic slots, such as Figures 1 to 6 As shown, the device includes a bottom plate 9 and a top plate 10 arranged parallel to each other. The center of the bottom plate 9 and the top plate 10 are connected by a connecting column. The bottom plate 9 has several through holes, and a magnetic groove detection mechanism for detecting the magnetic grooves of the rotor core is installed in the through holes. The magnetic groove detection mechanism includes a base 1 and a magnetic groove gauge 4. The base 1 is fixed to the top surface of the bottom plate 9, and the magnetic groove gauge 4 passes through the through holes in the bottom plate 9 and can move freely in the through holes. Several fixing plates 11 corresponding to the magnetic groove detection mechanism are installed on the bottom surface of the top plate 10. Sensors 8 that can detect changes in the position of the magnetic groove gauge 4 are installed on the fixing plates 11.

[0024] The base plate 1 is assembled with the vertical magnetic groove gauge 4 through a sliding component. The magnetic groove gauge 4 floats freely in four directions (front, back, left, and right) under the drive of the sliding component, so that the magnetic groove gauge 4 floats to a state where it can fall freely and be inserted into the magnetic groove.

[0025] The upper part of the magnetic groove gauge 4 has a vertical straight groove, such as... Figure 1As shown, the magnetic groove gauge 4 is connected to the sliding assembly on the base 1 by two fixing bolts 5 passing through the straight groove. The head width of the fixing bolt 5 on the outside of the magnetic groove gauge 4 is greater than the width of the straight groove on the magnetic groove gauge 4. The stud part of the fixing bolt 5 is slidably fitted with the straight groove on the magnetic groove gauge 4. The bottom ends of the magnetic groove gauge 4 are chamfered. When the chamfer at the bottom of the magnetic groove gauge 4 contacts the magnetic groove opening, the magnetic groove gauge 4 can be located at the exact center of the product magnetic groove, thus smoothly entering the product magnetic groove for inspection. The top of the magnetic groove gauge 4 is provided with a sensing rod 6 corresponding to the sensor 8 on the fixing plate 11, which facilitates the determination of whether the product magnetic groove is qualified by sensing the position of the sensing rod 6 by the sensor 8.

[0026] A square protrusion is provided in the middle of the upper part of the base 1, such as Figure 6 As shown, several bolts pass through holes on the base on both sides of the square protrusion. A bolt connection assembly passes through these holes to fix the base 1 to the base plate 9. Two symmetrically arranged base through holes are horizontally formed on the square protrusion at the top of the base 1, allowing for cross-shaped assembly with the sliding assembly. The sliding assembly includes a convex slider 2 and a concave slider 3, as shown... Figure 4 As shown, a square groove is provided in the center of the bottom of the convex slider 2. Two convex slider sliding shafts 12 are connected to the inner wall of the groove. The two convex slider sliding shafts 12 at the bottom of the convex slider 2 pass through the base through hole opened on the upper protrusion of the base 1 and are slidably assembled with the base 1; as shown. Figure 5 As shown, two sliding shafts 13 for the concave slider 3 are provided on the inner wall of the groove recessed at the bottom end, which are matched with the convex slider 2. The sliding shafts 13 pass through the two parallel convex slider holes provided on the convex block of the convex slider 2 and are perpendicular to the through holes of the base, and are assembled with the convex slider 2 to form a sliding assembly that can slide as a whole. The fixing bolts 5 that pass through the straight groove on the magnetic groove gauge 4 are finally fixedly connected to the outer side of the concave slider 3.

[0027] In the sliding assembly, the length of the convex slider sliding shaft 12 is greater than the length of the through hole of the base, so the convex slider 2 can slide left and right along the base 1 under the action of the convex slider sliding shaft 12; similarly, the length of the concave slider sliding shaft 13 is greater than the length of the through hole of the convex slider, so the concave slider 3 slides left and right relative to the convex slider 2 under the action of the concave slider sliding shaft 13, and slides back and forth relative to the base 1; the concave slider 3 and the convex slider 2 are installed in a cross-stacked manner, which can drive the magnetic groove gauge 4 to float freely in four directions: front, back, left and right. It should be noted that the floating space range of the magnetic groove gauge depends on the size of the convex slider 2 and the concave slider 3, as well as the length of the convex slider sliding shaft 12 and the concave slider sliding shaft 13.

[0028] Both the top side of the magnetic groove gauge 4 and the side of the concave slider 3 that contacts the magnetic groove gauge 4 are provided with outwardly protruding screws. The upper and lower ends of the spring 7 are connected to the screws on the sides of the magnetic groove gauge 4 and the concave slider 3, respectively. The spring 7 can drive the magnetic groove gauge 4, which has been pushed upward, to spring back to its original position.

[0029] The base of the present invention is fixed on the bottom plate, thereby fixing the original position of the magnetic groove gauge after it is inserted into the through hole of the bottom plate and locked with the sliding assembly. The positions of the top plate and the bottom plate remain unchanged. The bottom of the fixing plate installed on the top plate is aligned with the upper position of the magnetic groove gauge, so that the sensing rod at the top of the magnetic groove gauge corresponds to the sensor at the bottom of the fixing plate before detection.

[0030] When used to inspect the magnetic slots of the rotor core, the invention moves downwards as a whole. When the magnetic slot gauge is inserted into the magnetic slot of the rotor core, if the rotor core is placed at an angle, the magnetic slot gauge will be affected by the oblique force after being inserted into the magnetic slot. Under the action of the sliding component, it floats back and forth and left and right. When the magnetic slot gauge floats to a state where it can fall freely into the magnetic slot of the product, it is no longer affected by the oblique force. At this time, the magnetic slot gauge can be located in the exact center of the magnetic slot of the product. This overcomes the phenomenon that the magnetic slot gauge is affected by stress due to the improper placement of the rotor core, which causes inaccurate test results. Thus, it can objectively and truthfully reflect the state of the magnetic slot of the rotor core.

[0031] During testing, if the magnetic groove gauge can be smoothly inserted into the bottom of the magnetic groove without being ejected, and the sensing rod does not leave the sensor's sensing position, the magnetic groove of the product is considered qualified. If the magnetic groove gauge is pushed upward and moves upward along the straight groove provided on the magnetic groove gauge, causing the sensing rod at the top of the magnetic groove gauge to no longer sense the sensor and the sensor signal to be lost, then the magnetic groove of the product will be judged as unqualified.

[0032] As the magnetic groove gauge moves upward along the through hole in the base plate, the spring between the magnetic groove gauge and the sliding component will be stretched because the vertical position of the sliding component will not change. After the inspection is completed, the spring will drive the magnetic groove gauge back to its original position under the action of the tightening force, in preparation for the next inspection.

[0033] This invention provides a novel detection device for the magnetic slots of a rotor core, which can flexibly float within a certain space, avoiding the influence of the deviation between the detection mechanism and the product placement position, objectively and truthfully reflecting the state of the magnetic slots of the product, solving the problems of high false judgment rate and frequent incorrect judgment, thereby reducing the false alarm rate of the detection mechanism.

[0034] The magnetic groove detection mechanism of the present invention, the position and number of through holes on the bottom plate, and the number of fixing plates and sensors on the top plate can be arranged according to the number of magnetic grooves of different products, thereby improving the applicability of the mechanism.

Claims

1. A novel detection device for rotor core magnetic slots, characterized in that: The system includes a bottom plate (9) and a top plate (10) arranged parallel to each other. The bottom plate (9) has several through holes, and a magnetic groove detection mechanism for detecting the magnetic grooves of the rotor core is inserted through the through holes. The magnetic groove detection mechanism includes a base (1) fixed to the top surface of the bottom plate (9). A vertical magnetic groove gauge (4) is installed on the base (1) through a sliding component. The magnetic groove gauge (4) passes through the through holes on the bottom plate (9) and can move freely in the through holes. The center positions of the bottom plate (9) and the top plate (10) are connected by a connecting column. Several fixed plates (11) corresponding to the magnetic groove detection mechanism are provided on the bottom surface of the top plate (10). Sensors (8) for detecting the position changes of the magnetic groove gauge (4) are provided on the fixed plates (11). A square protrusion is provided at the upper center of the base. Several bolt through holes are provided on the base on both sides of the square protrusion. Two parallel base through holes are horizontally arranged in the square protrusion. The sliding assembly includes a slidingly assembled convex slider and a concave slider. The bottom of the convex slider is provided with an upward groove. Two convex slider sliding shafts are provided on the inner wall of the groove at the bottom of the convex slider, passing through the base through holes on the base and being able to slide along the base through holes. The concave slider is upside down on the convex block at the top of the convex slider. Two parallel convex slider through holes are horizontally opened on the convex block of the convex slider and perpendicular to the base through holes. Two concave slider sliding shafts are provided on the inner wall of the groove at the bottom of the concave slider, passing through the convex slider through holes.

2. The novel detection device for rotor core magnetic slots according to claim 1, characterized in that: The magnetic groove gauge (4) has a vertical straight groove on its upper part. The magnetic groove gauge (4) is connected to the sliding assembly on the base (1) by a fixing bolt (5) passing through the straight groove. The head width of the fixing bolt (5) located outside the magnetic groove gauge (4) is greater than the width of the straight groove on the magnetic groove gauge (4). The stud part of the fixing bolt (5) is slidably fitted with the straight groove on the magnetic groove gauge (4).

3. The novel detection device for rotor core magnetic slots according to claim 1, characterized in that: The bottom ends of the magnetic slot gauge (4) are provided with chamfers to facilitate vertical insertion into the rotor core magnetic slot.

4. A novel detection device for rotor core magnetic slots according to claim 1, characterized in that: The top of the magnetic groove gauge (4) is provided with a sensing rod (6) corresponding to the sensor (8) on the fixed plate (11).

5. A novel detection device for rotor core magnetic slots according to claim 2, characterized in that: The magnetic groove gauge (4) is connected to the outer end face of the concave slider (3) by a fixing bolt (5).

6. A novel detection device for rotor core magnetic slots according to claim 5, characterized in that: The base (1) and the convex slider (2) are stacked in a cross shape, as are the convex slider (2) and the concave slider (3); the length of the sliding shaft (12) of the convex slider is greater than the length of the hole through the base, and the length of the sliding shaft (13) of the concave slider is greater than the length of the hole through the convex slider.

7. A novel detection device for rotor core magnetic slots according to claim 5, characterized in that: The top side of the magnetic groove gauge (4) and the side end face of the concave slider (3) that contacts the magnetic groove gauge (4) are respectively provided with outward protruding screws, and a spring (7) that drives the magnetic groove gauge (4) to rebound is connected between the two screws.

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