A device for detecting quality of flat wire stator welding points

Abstract

The utility model proposes a flat wire stator welding point quality detection device, comprising: a rotating part, a detection notch is arranged at the edge of the rotating part; a centering part is arranged at the bottom of the rotating part; a micro switch is arranged on the rotating part, and the micro switch is used to realize on and off by being squeezed by the welding points of the same circle on the flat wire stator; a counting part is arranged on the rotating part, connected to the micro switch, and used to count the number of on and off times of the micro switch. The utility model sets the centering part, sets the detection notch on the edge of the rotating part, and sets the micro switch and the counting part on the rotating part. The centering part extends into the inner hole of the stator winding to detect and correct the inner diameter of the winding. The detection notch exposes a small amount of welding points, which is convenient for visual detection. The micro switch is squeezed by the welding points of the same circle on the flat wire stator to realize on and off. The counting part displays the number of on and off times, so it can be judged whether the detection notch has completed one circle by the number of on and off times, so that all welding points will not be missed, and the overall detection efficiency and quality can be improved.

Description

Technical Field

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

[0002] The windings of flat wire motors can withstand larger currents and have higher efficiency. Therefore, under the same power requirements, flat wire stator motors can use less copper enameled wire, which significantly reduces the cost of motor manufacturing. At the same time, they also have many advantages such as excellent NVH (noise, vibration, and harshness) and fast production efficiency. Therefore, they gradually replace round wire motors and become the only choice for mainstream and high-end motors. However, when making flat wire stators, due to the large number of solder joints and the large differences in solder joint quality, there are often many poor welds. The welding quality of solder joints directly affects whether the motor can be used normally, so solder joint welding quality inspection must be carried out.

[0003] In the prior art, there are two main ways to inspect the welding quality of the welds on the flat wire stator. The first way is to inspect the welds one by one manually, and the second way is to inspect the welds one by one using visual inspection equipment.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: manual visual inspection is easily disturbed by a large number of solder joints, which is difficult to see clearly and prone to visual fatigue. At the same time, when the motor is rotated in sequence for circumferential inspection of the entire circle of solder joints, the rotation angle or the number of inspections cannot be calculated, and missed inspections or repeated inspections often delay the production cycle, and defective products are easily discharged. However, visual inspection equipment is expensive, requires high consistency between solder joints and their corresponding hairpin lines, and has poor applicability, which needs to be improved and perfected. 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 flat wire stator welding point quality detection device, which is conducive to improving the detection quality and efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a flat wire stator welding point quality detection device, comprising:

[0008] A rotating part, wherein a detection notch is provided at an edge of the rotating part;

[0009] A centering portion, arranged at the bottom of the rotating portion;

[0010] A micro switch is arranged on the rotating part, and the micro switch is used to realize on-off by being squeezed by the welding points of the same circle on the flat wire stator;

[0011] The counting part is arranged on the rotating part and connected to the micro switch, and is used for counting the on and off times of the micro switch.

[0012] According to the flat wire stator weld quality detection device of the utility model, by setting a centering part, setting a detection notch on the edge of the rotating part, and setting a micro switch and a counting part on the rotating part, the centering part can extend into the inner hole of the stator winding to detect and correct the inner diameter of the winding, and the detection notch can expose a small amount of welds, which is convenient for visual detection. The micro switch is squeezed by the welds of the same circle on the flat wire stator to realize on and off, and the counting part displays the number of on and off times. Therefore, it can be judged by the number of on and off times whether the detection notch has completed a circle, so that all welds will not be missed, and the overall detection efficiency and quality can be improved. The flat wire stator weld quality detection device of the utility model is simple to operate, low in cost, and can detect the inner diameter of the winding and the quality of the welds at the same time, and has strong functionality.

[0013] According to an embodiment of the present invention, the rotating part is in the shape of a flat plate as a whole, and the rotating part and the centering part are detachably connected.

[0014] According to an embodiment of the present invention, the rotating part is provided with detection pieces at both ends of the detection notch, and the outer diameter of the detection piece is equal to the outer diameter of the winding that meets the requirements.

[0015] According to an embodiment of the present invention, the centering portion is in a circular ring shape as a whole, and the outer diameter of the centering portion is equal to the required inner diameter of the winding.

[0016] According to an embodiment of the utility model, the micro switch has a lever, the head end of the lever is movably connected to the main body of the lever, and the tail end of the lever is used to contact the welding points of the same circle on the flat wire stator.

[0017] According to an embodiment of the present invention, the size of the inspection notch can expose 2 to 10 welding points of the flat wire stator in the core slots.

[0018] According to an embodiment of the utility model, the counting part has a display screen, and the display screen is arranged on a side of the rotating part away from the flat wire stator.

[0019] According to an embodiment of the utility model, it further comprises a plurality of support parts, wherein the support parts are circumferentially arranged at the bottom of the edge of the rotating part, and the support parts are used to abut against the end surface of the flat wire stator on the same side as the welding point.

[0020] According to an embodiment of the utility model, the support portion has a cam follower, and the cam follower is slidably connected to the end surface of the flat wire stator on the same side as the welding point.

[0021] According to an embodiment of the utility model, it also includes a height detection part, which is arranged on the rotating part and is used to detect whether the distance between the welding point and the end surface on the same side thereof reaches a predetermined length.

[0022] 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

[0023] 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:

[0024] Figure 1 It is a structural schematic diagram of a flat wire stator welding point quality detection device proposed in one embodiment of the utility model.

[0025] Figure 2 The utility model is a schematic structural diagram of the bottom of a device for detecting the quality of flat wire stator welding points according to an embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the working state of the flat wire stator welding point quality detection device involved in the embodiment of the utility model.

[0027] Figure 4 yes Figure 3 A schematic diagram of the structure after omitting the rotating part in the flat wire stator welding point quality inspection device.

[0028] Description of reference numerals:

[0029] 1-rotating part, 2-counting part, 3-centering part, 4-height detection part, 5-support part, 6-micro switch, 11-first strip hole, 12-detection notch, 13-detection sheet, 14-wire slot, 15-second strip hole, 21-display screen, 41-measuring rod, 51-cam follower, 61-shift lever, 100-flat wire stator weld point quality detection device, 101-connecting part, 200-flat wire stator, 201-iron core, 202-twisted end face, 203-hairpin, 204-welding point. DETAILED DESCRIPTION

[0030] 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.

[0031] Combination Figures 1 to 4 As shown, the embodiment of the utility model provides a flat wire stator welding point quality inspection device 100.

[0032] The winding in the flat wire stator 200 is composed of a plurality of hairpins 203. The free ends between the hairpins need to be twisted according to the processing requirements so that the free ends are aligned in pairs according to the required windings and welded to form a twisted end, and the end face of the iron core 201 on the same side as the twisted end is the twisted end end face 202. The end of the hairpin needs to remove the paint layer for welding, and a welding spot 204 is formed at the welding point. There are a large number of welding spots 204, and each iron core slot has a radially arranged and equal number of welding spots 204. The number of welding spots in each circle is equal.

[0033] The flat wire stator welding point quality detection device comprises a rotating part 1, a centering part 3, a micro switch 6 and a counting part 2. A detection notch 12 is provided at the edge of the rotating part 1. The rotation of the rotating part 1 can be driven manually or by other driving methods. The function of the detection notch 12 is to expose a small amount of welding points 204, which is convenient for one-time visual detection. The centering part 3 is arranged at the bottom of the rotating part 1. The size of the detection notch 12 is designed according to actual needs and is not specifically limited. The function of the centering part 3 is to extend into the inner hole of the stator winding. The centering part 3 has an inner diameter that meets the requirements, so the inner diameter of the winding can be detected. The centering part 3 itself has a certain structural strength and can shape the winding that is not very regular. The micro switch 6 is arranged on the rotating part 1, and the micro switch 6 is used to realize on and off by being squeezed by the welding points 204 of the same circle on the flat wire stator. The micro switch is a switch with a small contact gap and an action stroke, which can quickly realize the on and off of the circuit. The counting part 2 is arranged on the rotating part 1 and connected to the micro switch 6, and is used to count the number of on and off times of the micro switch 6. Since the number of welding points in each circle, that is, the number of core slots, is fixed, when the number of on and off times of the micro switch 6 reaches the number of core slots, it can be determined that the detection notch 12 has rotated around the flat wire stator once.

[0034] According to the flat wire stator weld quality detection device of the embodiment of the utility model, by setting a centering part, setting a detection notch on the edge of the rotating part, and setting a micro switch and a counting part on the rotating part, the centering part can extend into the inner hole of the stator winding to detect and correct the inner diameter of the winding, and the detection notch can expose a small amount of welds, which is convenient for visual detection. The micro switch is squeezed by the welds of the same circle on the flat wire stator to realize on and off, and the counting part displays the number of on and off times. Therefore, it can be judged by the number of on and off times whether the detection notch has completed a circle, so that all welds will not be missed, and the overall detection efficiency and quality can be improved. The flat wire stator weld quality detection device of the embodiment of the utility model is simple to operate, low in cost, and can detect the inner diameter of the winding and the quality of the welds at the same time, and has strong functionality.

[0035] In some embodiments, in combination Figures 1 to 4 As shown, the rotating part 1 is flat as a whole, and the rotating part 1 is detachably connected to the centering part 3. Optionally, the rotating part 1 is made of die steel, which has high hardness and good wear resistance. Exemplarily, the rotating part 1 is threadedly connected to the centering part 3 using a connector 101, which is easy to disassemble.

[0036] The rotating part 1 is provided with detection pieces 13 at both ends of the detection notch 12, and the outer diameter of the detection piece 13 is equal to the outer diameter of the winding that meets the requirements. Therefore, by comparing the outer diameter of the detection piece 13 with the outer diameter of the winding, it is possible to determine whether the outer diameter of the winding meets the requirements. Exemplarily, the detection piece 13 is integrally formed with the rotating part 1 to save space. The size of the detection notch 12 can expose 2 to 10 welding points 204 of the flat wire stator in the core slots, which is not easy to cause visual fatigue caused by too many welding points.

[0037] The centering part 3 is annular as a whole, and the outer diameter of the centering part 3 is equal to the inner diameter of the winding that meets the requirements. The centering part 3 is hollow and has an installation space for the counting part 2. The bottom of the centering part 3 is chamfered to facilitate mutual cooperation with the inner hole of the flat wire stator, making it easier to align and insert the centering part 3.

[0038] The micro switch 6 has a lever 61, the head end of which is movably connected to the main body of the lever 61, and the end of the lever 61 is used to contact the welding points of the same circle on the flat wire stator. The end of the lever 61 is in an open and closed state between the welding points of two adjacent core slots. When the rotating part 1 rotates, the end of the lever 61 is squeezed by the welding points and is in a closed state. In one example, the end of the lever 61 has a cylindrical surface, which can smoothly enter the gap between the welding points 204.

[0039] In order to easily observe the reading of the counting part 2, the counting part 2 has a display screen 21, which is arranged on the side of the rotating part away from the flat wire stator. The micro switch 6 is connected to the counting part 2 by a cable. In order to meet the cable installation requirements, a wire groove 14 is arranged on the top surface of the rotating part 1.

[0040] Combination Figures 1 to 4 As shown, in some embodiments, the flat wire stator weld quality inspection device further includes a plurality of support portions 5, the support portions 5 are arranged at the bottom of the edge of the rotating portion 1 along the circumferential direction, and the support portions 5 are used to abut against the end surface of the same side of the weld 204 of the flat wire stator. The height of the support portion 5 is adjustable, and the height of the support portion 5 can be designed to be slightly higher than the required height of the skew end winding, so when the bottom of the rotating portion contacts the weld 204, it is determined that the height of the skew end winding does not meet the requirement. In one example, the edge of the rotating portion 1 is provided with a radial first strip hole 11 and a second strip hole 15, and the top of the support portion 5 is connected to the first strip hole 11 by a fastener. The first strip hole 11 enables the support portion 5 to be radially adjusted to the desired position, and is suitable for flat wire stators of different sizes. The second strip hole 15 is connected to the micro switch 6, and the micro switch 6 can also be radially adjusted to the desired position.

[0041] In order to reduce the wear on the end surface of the core, the support part 5 has a cam follower 51, and the cam follower 51 is slidably connected to the end surface of the flat wire stator on the same side of the welding point 204. In one example, the support part 5 has a vertical bar hole, and the cam follower 51 can be adjusted in height in the bar hole to adapt to windings of different heights.

[0042] The flat wire stator welding point quality detection device also includes a height detection unit 4, which is arranged on the rotating unit 1, and is used to detect whether the distance between the welding point 204 and the end face on the same side thereof reaches a predetermined length. In specific implementation, the height detection unit 4 can adopt a micrometer or a vernier gauge, and the height detection unit 4 has a measuring rod 41, the bottom end of which contacts the end face of the iron core, and the height detection unit 4 has a meter head, which can display the distance between the welding point 204 and the end face of the iron core. The meter head can also set upper and lower limits, and if the reading exceeds the upper and lower limits, an alarm is issued to prompt the operator that the winding of this flat wire stator is bad.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 flat wire stator welding point quality detection device, characterized in that: include: A rotating part (1), wherein a detection notch (12) is provided at an edge of the rotating part (1); A centering portion (3) is arranged at the bottom of the rotating portion (1); A micro switch (6) is arranged on the rotating part (1), and the micro switch (6) is used to realize switching by being squeezed by welding points (204) of the same circle on the flat wire stator; The counting part (2) is arranged on the rotating part (1) and is connected to the micro switch (6) and is used for counting the number of times the micro switch (6) is turned on and off.

2. The flat wire stator welding point quality detection device according to claim 1, characterized in that: The rotating part (1) is in the shape of a flat plate as a whole, and the rotating part (1) and the centering part (3) are detachably connected.

3. The flat wire stator welding point quality detection device according to claim 1, characterized in that: The rotating part (1) is provided with detection pieces (13) at both ends of the detection notch (12); the outer diameter of the detection piece (13) is equal to the outer diameter of the winding that meets the requirements.

4. The flat wire stator welding point quality inspection device according to claim 1, characterized in that: The centering portion (3) is in the shape of a circular ring as a whole, and the outer diameter of the centering portion (3) is equal to the inner diameter of the winding that meets the requirements.

5. The flat wire stator welding point quality inspection device according to claim 1, characterized in that: The micro switch (6) has a lever (61), the head end of the lever (61) is movably connected to the body of the lever (61), and the tail end of the lever (61) is used to contact the welding point of the same circle on the flat wire stator.

6. The flat wire stator welding point quality inspection device according to claim 1, characterized in that: The size of the inspection notch (12) is capable of exposing welding points (204) of the flat wire stator in 2 to 10 core slots.

7. The flat wire stator welding point quality inspection device according to claim 1, characterized in that: The counting part (2) has a display screen (21), and the display screen (21) is arranged on a side of the rotating part away from the flat wire stator.

8. The flat wire stator welding point quality inspection device according to any one of claims 1 to 7, characterized in that: It also comprises a plurality of support parts (5), wherein the support parts (5) are arranged at the bottom of the edge of the rotating part (1) along the circumferential direction, and the support parts (5) are used to abut against the same side end surface of the welding point (204) of the flat wire stator.

9. The flat wire stator welding point quality inspection device according to claim 8, characterized in that: The support portion (5) has a cam follower (51), and the cam follower (51) is slidably connected to the same side end surface of the welding point (204) of the flat wire stator.

10. The flat wire stator welding point quality inspection device according to claim 9, characterized in that: It also comprises a height detection part (4), which is arranged through the rotating part (1) and is used to detect whether the distance between the welding point (204) and the end surface on the same side thereof reaches a predetermined length.

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