Stator core detection device

Abstract

The utility model provides a stator core detection device. The stator core detection device comprises a base; the plurality of iron core supporting assemblies are arranged on the base, the iron core supporting assemblies are used for clamping vertically placed stator iron cores, the outer side surfaces of the iron core supporting assemblies are provided with cylindrical surfaces, and the central axes of the cylindrical surfaces are consistent with the central axes of the stator iron cores; and the perpendicularity measuring assembly is provided with an arc surface matched with the cylindrical surface, the perpendicularity measuring assembly comprises a length measuring meter and an abutting rod, and the length measuring meter and the abutting rod are in contact with the stator iron core and point to the central axis of the stator iron core. According to the utility model, the influence of stator iron core processing errors can be eliminated, eccentric errors can be eliminated, and the length measuring meter can be aligned with the central axis of the stator iron core at each measuring point to reflect the real perpendicularity deviation of the stator iron core.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a stator core detection device. Background Art

[0002] The power source of the motor comes from the mutual repulsion between the stator and the rotor, so the quality of the stator directly affects the quality and stability of the motor. The stator is mainly composed of the stator core and the enameled wire winding, insulation materials, etc. assembled on it. The stator core is welded by core punching sheets, but the welding quality and consistency are often not guaranteed, resulting in many defects such as weld cracking (insufficient weld penetration) and verticality deviation in the welded stator core. A bad stator core will directly cause the stator core to be unable to be assembled into the housing when the motor is assembled, causing it to get stuck, or crack, affecting the motor life and NVH noise.

[0003] In the prior art, when measuring the verticality of the stator core, the corresponding equal-height blocks are added to the platform, and the stator core to be measured is placed on the equal-height blocks. The corresponding inspection fixture is used. The inspection fixture includes an abutment rod and a dial indicator that can be moved in the vertical direction. The axis of the abutment rod and the axis of the dial indicator measuring axis must be parallel to the radial line of the stator core. The abutment rod on the lower side abuts against the outer circle of the core, and the dial indicator probe on the upper side also abuts against the outer circle of the core. At this time, this measurement point is regarded as the reference and the dial indicator reading is cleared. Measure several points along the circumference of the core, and the data with the largest difference is the maximum deviation value of the verticality of the core.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: during actual measurement, the accuracy of the verticality detection value depends on the inspector measuring the axis of the abutment rod and the axis of the dial indicator measuring axis parallel to the radial line of the stator core. The inspection fixture does not have a reference surface for positioning, so it is difficult to achieve parallelism between the axis of the dial indicator measuring axis and the radial line of the stator core, resulting in out-of-tolerance verticality measurement data. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] Therefore, the purpose of the utility model is to provide a stator core detection device to improve the accuracy of the stator core verticality detection.

[0007] In order to achieve the above object, the utility model proposes a stator core detection device, comprising:

[0008] Base;

[0009] A plurality of core support assemblies are arranged on the base, the core support assemblies are used to clamp the vertically placed stator core, the outer side surface of the core support assembly has a cylindrical surface, and the central axis of the cylindrical surface is consistent with the central axis of the stator core;

[0010] The verticality measuring assembly has an arc surface adapted to the cylinder, and the verticality measuring assembly includes a length measuring gauge and an abutment rod. The length measuring gauge and the abutment rod are in contact with the stator core and point to the central axis of the stator core.

[0011] According to the stator core detection device of the utility model, by setting the core support component and the verticality measuring component, the outer side surface of the core support component has a cylinder, the verticality measuring component has an arc surface adapted to the cylinder, the length measuring gauge and the abutment rod point to the central axis of the stator core, eliminating the influence of the stator core processing error and the eccentricity error. At each measuring point, the length measuring gauge can be aligned with the central axis of the stator core to reflect the actual verticality deviation of the stator core.

[0012] According to one embodiment of the utility model, the core support assembly includes a core support plate, a mounting block and a clamping plate, the core support plate is arranged along the circumference of the stator core, the mounting block is connected to the core support plate, and the clamping plate is connected to the side of the mounting block close to the stator core.

[0013] According to an embodiment of the utility model, the core support assemblies are arranged at intervals, the outer side surface of the core support plate is defined as the cylindrical surface, and the inner wall of the clamping plate is in contact with the outer wall of the stator core.

[0014] According to one embodiment of the utility model, it also includes a pressure block, the core support plate includes an integrally formed arc block and an inner support plate, the outer side surface of the arc block is defined as the cylindrical surface, one end of the inner support plate away from the arc block points to the central axis of the stator core, the pressure block is arranged above the inner support plate close to the central axis of the stator core, and the pressure block is connected to the base.

[0015] According to one embodiment of the utility model, the verticality measuring assembly also includes a mounting bracket, the bottom surface of the mounting bracket is in contact with the supporting surface of the base, the length measuring table and the abutment rod are arranged parallel to the mounting bracket, and the inner side surface of the mounting bracket is defined as the arc surface.

[0016] According to one embodiment of the utility model, it also includes a mechanical property measurement component, which includes a top block that can move radially and a pressure sensor, the top block is used to abut against the outer wall of the stator core, and the pressure sensor is used to measure the pressure of the top block on the stator core.

[0017] According to one embodiment of the utility model, the mechanical property measurement assembly also includes a push rod mounting plate and a push rod, the push rod mounting plate is provided with a plurality of threaded holes in the vertical direction, the push rod is threadedly connected to one of the threaded holes, the push block is provided with a groove, the pressure sensor is arranged in the groove, one end of the push rod extends into the groove and is arranged opposite to the pressure sensor.

[0018] According to an embodiment of the utility model, the top block is provided with a concave arc surface at one end close to the stator core, and a lug portion is provided on the outer wall of the stator core, and the concave arc surface is adapted to the shape of the lug portion.

[0019] According to an embodiment of the utility model, the mechanical property measurement assembly also includes a guide rod, the top rod mounting plate is provided with a plurality of light holes along the vertical direction, one end of the guide rod is connected to the top block, and the guide rod is slidably connected to the light hole.

[0020] According to an embodiment of the utility model, it also includes a display screen, which is connected to the pressure sensor and displays the pressure value of the top block on the stator core.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0023] Figure 1 It is a structural schematic diagram of a stator core detection device proposed in one embodiment of the utility model.

[0024] Figure 2 It is a structural schematic diagram of another angle of the stator core detection device proposed in one embodiment of the utility model.

[0025] Figure 3 It is a working schematic diagram of a stator core detection device proposed in one embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1-base, 2-core support plate, 3-mounting block, 4-tightening plate, 5-verticality measuring assembly, 6-pressing block, 7-mechanical property measuring assembly, 21-arc block, 22-inner support plate, 51-mounting bracket, 52-abutment rod, 53-length measuring table, 100-stator core detection device, 200-stator core, 201-lug part, 531-measuring rod, 711-threaded hole, 712-light hole, 713-thrust rod mounting plate, 721-thrust rod, 722-guide rod, 723-thrust block, 724-concave arc surface, 725-pressure sensor, 726-display screen. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0029] Combination Figures 1 to 3 As shown, an embodiment of the utility model provides a stator core detection device 100, including a base 1, a plurality of core support components and a verticality measurement component 5.

[0030] The base 1 mainly plays a supporting role, supporting the core support assembly, the verticality measurement assembly 5 and the stator core 200. The upper surface of the base 1 is a horizontal surface. The base 1 is made of rigid material.

[0031] There are multiple core support assemblies, which are arranged on the base 1. The core support assemblies are used to clamp the vertically placed stator core 200. The outer side of the core support assembly has a cylindrical surface, and the central axis of the cylindrical surface is consistent with the central axis of the stator core 200. The core support assembly is detachably connected to the base 1 and can be replaced according to stator cores of different sizes and models.

[0032] The verticality measuring assembly 5 has an arc surface adapted to the cylindrical surface, and includes a length measuring gauge 53 and an abutting rod 52. The length measuring gauge 53 and the abutting rod 52 are in contact with the stator core 200 and point to the central axis of the stator core 200. The length measuring gauge 53 can be a dial gauge or a micrometer, and the length measuring gauge 53 has a measuring rod 531. The plane formed by the axis of the measuring rod 531 and the abutting rod 52 is coplanar with the central axis of the stator core 200.

[0033] When the stator core detection device 100 is used, the stator core 200 is placed on the base 1, and the core support assembly clamps the stator core 200. The verticality measurement assembly 5 is against the outer surface of the core support assembly, the length measurement gauge 53 and the abutment rod 52 are in contact with the stator core 200, and the value of the length measurement gauge 53 is read to obtain the verticality value of the stator core at this position, and then multiple positions are changed to obtain the verticality values ​​of the stator core at other positions.

[0034] According to the stator core detection device of the embodiment of the utility model, by setting the core support component and the verticality measuring component, the outer side surface of the core support component has a cylinder, the verticality measuring component has an arc surface adapted to the cylinder, the length measuring gauge and the abutment rod point to the central axis of the stator core, eliminating the influence of the stator core processing error and the eccentricity error. At each measuring point, the length measuring gauge can be aligned with the central axis of the stator core to reflect the actual verticality deviation of the stator core.

[0035] In some embodiments, Figure 2 As shown, the core support assembly includes a core support plate 2, a mounting block 3 and a clamping plate 4. The core support plate 2 is arranged along the circumference of the stator core 200, the mounting block 3 is connected to the core support plate 2, and the clamping plate 4 is connected to the side of the mounting block 3 close to the stator core 200.

[0036] The core support plate 2 is arranged on the base 1, and its function is to carry the stator core 200. The mounting block 3 is mounted on the core support plate 2, and is used to mount the abutment sheet 4. The abutment sheet 4 can be made of nylon to reduce damage to the stator core 200.

[0037] The core support components are arranged at intervals, the outer side surface of the core support plate 2 is defined as a cylinder, and the inner wall of the clamping plate 4 is in contact with the outer wall of the stator core 200. Some stator cores 200 have lugs 201, and the core support components are arranged at intervals so that the lugs 201 are placed at the intervals to avoid interference with the core support components. The size of the clamping plate 4 is selected according to the size of the stator core 200, and no specific setting is made for this. In one example, the mounting block 3 is fixed to the core support plate 2 by bolts, and the mounting block 3 is also fixed to the clamping plate 4 by bolts, which can withstand heavier loads and facilitate disassembly.

[0038] The stator core detection device also includes a pressing block 6. The core support plate 2 includes an integrally formed arc block 21 and an inner support plate 22. The outer side surface of the arc block 21 is defined as a cylinder. The end of the inner support plate 22 away from the arc block 21 points to the central axis of the stator core 200. The pressing block 6 is arranged above the inner support plate 22 close to the central axis of the stator core 200, and the pressing block 6 is connected to the base 1. The cross section of the inner support plate 22 is fan-shaped, which saves manufacturing materials. The pressing block 6 can press the core support plate 2 so that the position of the core support plate 2 is fixed.

[0039] Combination Figures 1 to 3 As shown, in some embodiments, the verticality measuring assembly 5 further includes a mounting bracket 51, the bottom surface of the mounting bracket 51 is in contact with the supporting surface of the base 1, the length measuring gauge 53 and the abutment rod 52 are arranged in parallel on the mounting bracket 51, and the inner side surface of the mounting bracket 51 is defined as an arc surface. The mounting bracket 51 is in an inverted T shape when viewed from the side, which can effectively disperse the gravity of the upper part to the wide base at the lower part, thereby increasing the overall stability.

[0040] Combination Figures 1 to 3 As shown, in some embodiments, the stator core detection device also includes a mechanical property measurement component 7, which includes a top block 723 that can move radially and a pressure sensor 725, the top block 723 is used to abut against the outer wall of the stator core 200, and the pressure sensor 725 is used to measure the pressure of the top block 723 on the stator core 200.

[0041] The mechanical property measurement component 7 is used in conjunction with the verticality measurement component 5 to measure the radial welding strength, elastic modulus, radial fracture strength value of the stator core weld and radial yield strength of the stator core welding.

[0042] The ejector block 723 can be pneumatic, hydraulic, or spiral ejector to achieve radial extrusion of the stator core.

[0043] In one example, the mechanical property measurement assembly 7 further includes a mandrel mounting plate 713 and a mandrel 721, the mandrel mounting plate 713 is provided with a plurality of threaded holes 711 in the vertical direction, the mandrel 721 is threadedly connected to one of the threaded holes 711, the mandrel 723 is provided with a groove, the pressure sensor 725 is arranged in the groove, one end of the mandrel 721 extends into the groove and is arranged opposite to the pressure sensor 725. The mandrel 721 can convert rotational motion into radial motion, and the thread pitch is adjusted according to actual conditions so as to increase the pressure steadily and gradually.

[0044] The top block 723 is provided with an inner concave arc surface 724 at one end close to the stator core 200, and the outer wall of the stator core 200 is provided with a lug portion 201, and the inner concave arc surface 724 is adapted to the shape of the lug portion 201. It should be noted that the top block 723 also has arc surfaces adapted to the stator core 200 on both sides of the inner concave arc surface 724. In other words, the top block 723 can choose to abut against the lug portion 201, or can choose other areas outside the lug portion 201, which increases the flexibility of use.

[0045] The mechanical property measurement assembly also includes a guide rod 722, and the top rod mounting plate 713 is provided with a plurality of light holes 712 in the vertical direction. One end of the guide rod 722 is connected to the top block 723, and the guide rod 722 is slidably connected to the light hole 712. The number of the guide rods 722 is designed according to actual needs and is not specifically limited thereto. The guide rods 722 enable the top block 723 to apply pressure to the stator core 200 in the radial direction.

[0046] The stator core detection device also includes a display screen 726, which is connected to the pressure sensor 725 and displays the pressure value of the top block 723 on the stator core 200, which is convenient for observation and recording.

[0047] The working principle and use method of the stator core detection device proposed in the embodiment of the utility model when measuring mechanical properties are as follows:

[0048] During the test, first loosen the bolts of the clamping plate 4 so that the outer diameter formed by the inner wall of the clamping plate 4 is much larger than the outer diameter of the stator core 200 to be measured, so that the stator core can be easily placed on the core support plate 2, and at the same time unlock the push rod 721 to leave space for the pressure sensor 725 to be installed. Then place the stator core 200 on the core support plate 2, tighten the connecting bolts of the clamping plate 4, so that the contact position between the stator core 200 and the clamping plate 4 is tightened and locked. At the same time, tighten the push rod 721, and the push rod 721 pushes the pressure sensor 725 against the side wall of the stator core 200 to apply pressure to the stator core 200. Continue to tighten the push rod 721, and the stator core 200 will deform when one side is stressed. Place the verticality measurement assembly 5 in the direction opposite to the push rod 721 to measure the displacement of the stator core 200 when it is subjected to radial force.

[0049] In elastic deformation, the formula is: σ=E×ε, where σ is the stress value within the elastic limit, E is the elastic modulus of elastic deformation, and ε is the displacement of elastic deformation. The stress value and displacement of deformation in this formula can be detected in real time. By measuring several sets of data, the elastic modulus E of the stator core after welding can be calculated. At the same time, when the top rod continues to increase the tightening force, when the deformation increases and the stress does not change significantly, the yield strength σs of the stator core can be obtained. When testing cores of different batches, the rigidity of the stator core and the strength of the core weld can be reflected by comparing and sampling the elastic modulus E and yield strength σs of the core.

[0050] Continuously tightening the push rod increases the force on the stator core. When the applied force is greater than the ultimate strength σb of the core, the core breaks. At this time, the feedback value of the pressure sensor is the value of the radial breaking strength of the stator core.

[0051] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0055] Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A stator core detection device, characterized in that: include: Base (1); A plurality of core support assemblies are arranged on the base (1), the core support assemblies are used to clamp a vertically placed stator core (200), the outer side surface of the core support assemblies has a cylindrical surface, and the central axis of the cylindrical surface is consistent with the central axis of the stator core (200); A verticality measuring assembly (5) has a curved surface adapted to the cylindrical surface, and the verticality measuring assembly (5) comprises a length measuring gauge (53) and an abutment rod (52). The length measuring gauge (53) and the abutment rod (52) are in contact with the stator core (200) and point to the central axis of the stator core (200).

2. The stator core detection device according to claim 1, characterized in that: The core support assembly comprises a core support plate (2), a mounting block (3) and a retaining plate (4); the core support plate (2) is arranged along the circumference of the stator core (200); the mounting block (3) is connected to the core support plate (2); and the retaining plate (4) is connected to a side of the mounting block (3) close to the stator core (200).

3. The stator core detection device according to claim 2, characterized in that: The core support components are arranged at intervals, the outer side surface of the core support plate (2) is defined as the cylindrical surface, and the inner wall of the abutting plate (4) is in contact with the outer wall of the stator core (200).

4. The stator core detection device according to claim 2, characterized in that: The invention also comprises a pressing block (6), wherein the core support plate (2) comprises an integrally formed circular arc block (21) and an inner support plate (22), wherein the outer side surface of the circular arc block (21) is defined as the cylindrical surface, and an end of the inner support plate (22) away from the circular arc block (21) points to the central axis of the stator core (200), and the pressing block (6) is arranged above the inner support plate (22) close to the central axis of the stator core (200), and the pressing block (6) is connected to the base (1).

5. The stator core detection device according to claim 1, characterized in that: The verticality measuring assembly (5) further comprises a mounting bracket (51), the bottom surface of the mounting bracket (51) being in contact with the supporting surface of the base (1), the length measuring gauge (53) and the abutment rod (52) being arranged on the mounting bracket (51) in parallel, and the inner side surface of the mounting bracket (51) being defined as the arc surface.

6. The stator core detection device according to any one of claims 1 to 5, characterized in that: It also includes a mechanical property measurement component (7), which includes a top block (723) that can move radially and a pressure sensor (725), wherein the top block (723) is used to abut against the outer wall of the stator core (200), and the pressure sensor (725) is used to measure the pressure of the top block (723) on the stator core (200).

7. The stator core detection device according to claim 6, characterized in that: The mechanical property measurement assembly (7) further comprises a push rod mounting plate (713) and a push rod (721); the push rod mounting plate (713) is provided with a plurality of threaded holes (711) in a vertical direction; the push rod (721) is threadedly connected to one of the threaded holes (711); the push block (723) is provided with a groove; the pressure sensor (725) is arranged in the groove; one end of the push rod (721) extends into the groove and is arranged opposite to the pressure sensor (725).

8. The stator core detection device according to claim 6, characterized in that: The top block (723) is provided with an inner concave arc surface (724) at one end close to the stator core (200), and a lug portion (201) is provided on the outer wall of the stator core (200), and the inner concave arc surface (724) is adapted to the shape of the lug portion (201).

9. The stator core detection device according to claim 7, characterized in that: The mechanical property measurement assembly also includes a guide rod (722), the top rod mounting plate (713) is provided with a plurality of light holes (712) along the vertical direction, one end of the guide rod (722) is connected to the top block (723), and the guide rod (722) is slidably connected to the light hole (712).

10. The stator core detection device according to claim 6, characterized in that: It also includes a display screen (726), which is connected to the pressure sensor (725) and displays the pressure value of the top block (723) on the stator core (200).

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