Stator core wire duct detection device

Abstract

The utility model relates to the technical field of stator core manufacturing and detection, in particular to a stator core wire slot detection device, which comprises a detection workbench, a detection seat arranged on the detection workbench, and a tooth-shaped detection ring arranged on the upper end surface of the detection seat, a plurality of go gauge teeth used for detecting a stator core wire slot are distributed on the outer circle of the tooth-shaped detection ring in the circumferential direction, and the tooth shape of each go gauge tooth comprises a tooth top face located on the top of the go gauge tooth, tooth side faces located on the two sides of the go gauge tooth and a tooth root with a contraction neck shape. And gaps are formed between the tooth top surfaces, the tooth side surfaces and the tooth roots of the go gauge teeth and the wire slots of the stator core. According to the utility model, the detection efficiency and the detection precision of the stator core wire duct are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stator core manufacturing and detection, and particularly relates to a detection device for stator core slots. Background Art

[0002] A stator core is a stationary iron core component inside a motor housing, which is formed by laminating a plurality of annular thin silicon steel sheets.

[0003] As Figure 4 shown in the stator core 1, slots 20 for winding core coils are arranged circumferentially. In order to ensure the uniformity of the slot distribution on the stator core and the width accuracy requirements of the slots along the circumferential direction, the stator core needs to be detected after manufacturing.

[0004] In the prior art, the detection of the uniformity of the conventional stator core slot distribution and the detection of the slot width are carried out by inspectors using a general measuring scale. The uniformity of the slots is judged by using a caliper to detect whether the pitch between adjacent slots is the same, and the width of the slot is judged by measuring the width of a single slot on a specified pitch circle to determine whether the slot width meets the accuracy requirements. The detection accuracy and efficiency are both relatively low. Another method for detecting the slot width is to use a slot plug gauge for detection. The slot plug gauge is usually made in the shape of a single slot plug gauge, which has a go-no-go end. During detection, it is required that the go end can pass through and the no-go end cannot pass through. However, when the number of slots is large, it is necessary to insert the plug gauge into each single slot one by one for detection, which has a large detection labor intensity and the detection efficiency is still not high.

[0005] Therefore, it is necessary to improve the technology to solve the above problems. Content of the Utility Model

[0006] In order to solve the above problems, the utility model provides a detection device for stator core slots, aiming to improve the detection efficiency and accuracy of stator core slots. The specific technical solutions are as follows:

[0007] A detection device for stator core slots includes a detection workbench, a detection seat arranged on the detection workbench, and a toothed detection ring arranged on the upper end face of the detection seat. A plurality of go gauges for detecting stator core slots are circumferentially distributed on the outer circle of the toothed detection ring. The tooth shape of the go gauge includes a tooth top surface at the top of the go gauge, tooth side surfaces on both sides of the go gauge, and a tooth root with a constricted neck shape. A gap is provided between the tooth top surface, tooth side surfaces and tooth root of the go gauge and the slots of the stator core.

[0008] During detection, each slot of the stator core is sleeved over the corresponding through-gauge teeth of the toothed detection ring and is stably seated on the detection seat; if it can be smoothly sleeved onto the through-gauge teeth, it indicates that the through-gauge detection of the stator core slots passes, and the slot width meets the accuracy requirements of the minimum width.

[0009] In order to further determine whether the slot width meets the accuracy requirements of the maximum width, as a further improvement, a pneumatic slot side clearance detection module for quickly detecting the slot width of the stator core is also provided in a stator core slot detection device of the present utility model; the pneumatic slot side clearance detection module includes air blowing holes symmetrically arranged on the tooth side surfaces on both sides of the through-gauge teeth, and a blowing air passage arranged inside the through-gauge teeth and communicating with the air blowing holes at both sides of the through-gauge teeth; the blowing air passages on each through-gauge tooth are respectively connected to the corresponding pneumatic output ports of a multi-way reversing and switching valve group through pipelines, and the pneumatic input port of the multi-way reversing and switching valve group is connected to a pneumatic gauge through a pipeline.

[0010] By setting the pneumatic slot side clearance detection module as described above, during operation, the multi-way reversing and switching valve group can directly supply air to each through-gauge tooth respectively, and the air flow rates flowing out from the tooth side surfaces on both sides of each through-gauge tooth are detected one by one through the pneumatic gauge, and it is determined whether the slot width meets the accuracy requirements of the maximum width according to the magnitudes of the air flow rates.

[0011] In the present utility model, the blowing air passage includes a radial blowing air passage arranged inside the through-gauge tooth along the radial direction of the toothed detection ring and communicating with the air blowing holes at both sides of the through-gauge tooth, and an axial blowing air passage arranged on the end surface of the toothed detection ring and communicating with the radial blowing air passage; the multi-way reversing and switching valve group is a one-in-and-multiple-out multi-way reversing and switching valve group with one pneumatic input port and multiple pneumatic output ports; each axial blowing air passage is connected to the corresponding pneumatic output ports of the multi-way reversing and switching valve group through pipelines.

[0012] Preferably, the axial blowing air passage is arranged on the lower end surface of the toothed detection ring.

[0013] Preferably, the multi-way reversing and switching valve group is a rotary multi-way reversing and switching valve group.

[0014] Preferably, the radial blowing air passage is formed by drilling on the tooth top surface of the through-gauge tooth, and a plug is arranged at the hole opening part of the drilled hole on the tooth top surface, and the axial blowing air passage communicating with the radial blowing air passage is formed by drilling on the end surface of the toothed detection ring.

[0015] In the present utility model, the air blowing holes are obliquely arranged relative to the tooth side surface of the through-gauge tooth.

[0016] By obliquely arranging the air blowing holes as described above, interference between the drill bit and adjacent through-gauge teeth during drilling of the air blowing holes can be avoided.

[0017] In the present utility model, a pneumatic pipe joint is provided at the mouth of the axial air blowing passage on the end face of the toothed detection ring, and each of the pneumatic pipe joints is correspondingly connected to each pneumatic output port of a multi-way reversing and switching valve group through a pipeline.

[0018] In the present utility model, a positioning hole is provided on the detection seat, a positioning stop is provided on the lower end face of the toothed detection ring, and the toothed detection ring is positioned on the positioning hole of the detection seat through the positioning stop and fixed by screws.

[0019] In order to improve the detection accuracy, a detection and calibration gauge matching the pneumatic slot side clearance detection module is further provided in a stator core slot detection device of the present utility model, and the slot cross-sectional shape and size of the detection and calibration gauge are the same as the theoretical designed slot cross-sectional shape and size of the stator core.

[0020] Preferably, the slots of the detection and calibration gauge are formed by wire cutting.

[0021] Preferably, the detection and calibration gauge includes a calibration go-gauge and a calibration no-go-gauge.

[0022] In the present utility model, the multi-way reversing and switching valve group and the pneumatic gauge are respectively connected to a controller.

[0023] In order to improve the detection accuracy, before the formal detection, the calibration go-gauge and the calibration no-go-gauge can be used in advance as simulated detection parts (stator core) for calibration detection to achieve the purpose of calibrating and compensating the accuracy of the pneumatic gauge. After the calibration detection, the formal detection of the stator core slots is carried out.

[0024] During detection, the slots of the stator core are correspondingly sleeved on the go-gauge teeth of the toothed detection ring and are stably seated on the detection seat. The multi-way reversing and switching valve group and the pneumatic gauge are opened through the controller, and the widths of the slots of the stator core are detected in sequence. When the slot width exceeds the tolerance, the controller issues an alarm reminder, and the position of the slot with the tolerance exceeded is displayed on the display screen of the controller.

[0025] The beneficial effects of the present utility model are as follows:

[0026] First, a stator core slot detection device of the present utility model adopts a toothed detection ring with go-gauge teeth, which can detect whether foreign matters are mixed in the stator core slots and whether the slot width meets the minimum slot width requirement at one time, and has high detection efficiency.

[0027] Second, a stator core slot detection device of the present utility model is provided with a pneumatic slot side clearance detection module, and the detection of the widths of each slot is alternately switched through a multi-way reversing and switching valve group, further improving the detection efficiency.

[0028] Thirdly, in a stator core slot detection device of the present utility model, air blowing holes are symmetrically arranged on the tooth side faces on both sides of the go gauge teeth, which can accurately detect the total air flow volume of a single go gauge tooth, and obtain the width of the go gauge tooth at the pitch circle according to the total air flow volume, with high detection accuracy and good automation degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a stator core slot detection device of the present utility model;

[0030] Figure 2 is Figure 1 a schematic structural diagram of the tooth-shaped detection ring in

[0031] Figure 3 is Figure 2 a top view (cross-sectional view) of

[0032] Figure 4 is Figure 1 a schematic structural diagram (top view) of the stator core in

[0033] In the figure: 1. Stator core, 2. Detection workbench, 3. Detection seat, 4. Tooth-shaped detection ring, 5. Go gauge tooth, 6. Tooth top surface, 7. Tooth side face, 8. Tooth root, 9. Pneumatic slot side clearance detection module, 10. Air blowing hole, 11. Air blowing passage, 11-1. Radial air blowing passage, 11-2. Axial air blowing passage, 12. Multi-way reversing and switching valve group, 13. Pneumatic output port, 14. Pneumatic input port, 15. Pneumatic gauge, 16. Plug, 17. Pneumatic pipe joint, 18. Positioning hole, 19. Positioning stop, 20. Slot, 21. Pipeline, 22. Screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following further describes the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0035] As Figures 1 to 4 shown in the embodiment of a stator core slot detection device of the present utility model, it includes a detection workbench 2, a detection seat 3 arranged on the detection workbench 2, and a tooth-shaped detection ring 4 arranged on the upper end surface of the detection seat 3. A plurality of go gauge teeth 5 for detecting the slots 20 of the stator core 1 are circumferentially distributed on the outer circle of the tooth-shaped detection ring 4. The tooth shape of the go gauge teeth 5 includes a tooth top surface 6 located at the top of the go gauge teeth 5, tooth side faces 7 located on both sides of the go gauge teeth 5, and a tooth root 8 having a constricted neck shape. There is a gap between the tooth top surface 6, tooth side faces 7, and tooth root 8 of the go gauge teeth 5 and the slots 20 of the stator core 1.

[0036] During detection, each slot 20 of the stator core 1 is correspondingly sleeved over each go-no-go tooth 5 of the toothed detection ring 4 and is stably seated on the detection seat 3; if it can be smoothly sleeved over the go-no-go tooth 5, it indicates that the go-no-go detection of the slots 20 of the stator core 1 passes, and the width of the slots 20 meets the accuracy requirements of the minimum width.

[0037] In order to further determine whether the width of the slot 20 meets the accuracy requirements of the maximum width, as a further improvement, a pneumatic slot side clearance detection module 9 for quickly detecting the width of the slot 20 of the stator core 1 is also provided in a stator core slot detection device of this embodiment; the pneumatic slot side clearance detection module 9 includes air blowing holes 10 symmetrically arranged on the two side tooth surfaces 7 of the go-no-go tooth 5, and an air blowing passage 11 provided inside the go-no-go tooth 5 and communicating with the air blowing holes 10 at both sides of the go-no-go tooth 5; the air blowing passages 11 on each go-no-go tooth 5 are respectively connected to the corresponding pneumatic output ports 13 of a multi-way reversing and switching valve group 12 through pipelines 21, and the pneumatic input port 14 of the multi-way reversing and switching valve group 12 is connected to a pneumatic gauge 15 through a pipeline.

[0038] By providing the pneumatic slot side clearance detection module 9 as described above, during operation, the multi-way reversing and switching valve group 12 can directly supply air to each go-no-go tooth 5, and the pneumatic gauge 15 is used to detect the air flow rate flowing out from the two side tooth surfaces 7 of each go-no-go tooth 5 one by one, and it is determined whether the width of the slot 20 meets the accuracy requirements of the maximum width according to the size of the air flow rate.

[0039] In this embodiment, the air blowing passage 11 includes a radial air blowing passage 11-1 arranged radially inside the go-no-go tooth 5 and communicating with the air blowing holes 10 at both sides of the go-no-go tooth 5, and an axial air blowing passage 11-2 arranged on the end face of the toothed detection ring 4 and communicating with the radial air blowing passage 11-1; the multi-way reversing and switching valve group 12 is a one-in-and-multiple-out multi-way reversing and switching valve group 12 having one pneumatic input port 14 and multiple pneumatic output ports 13; each axial air blowing passage 11-2 is connected to the corresponding pneumatic output port 13 of the multi-way reversing and switching valve group 12 through a pipeline 21.

[0040] Preferably, the axial air blowing passage 11-2 is arranged on the lower end face of the toothed detection ring 4.

[0041] Preferably, the multi-way reversing and switching valve group 12 is a rotary multi-way reversing and switching valve group.

[0042] Preferably, the top surface 6 of the go - gauge tooth 5 is machined by drilling to form the radial air - blowing passage 11 - 1, and a plug 16 is arranged at the orifice of the drilled hole on the top surface 6 of the tooth. The end surface of the toothed detection ring 4 is machined by drilling to form an axial air - blowing passage 11 - 2 communicating with the radial air - blowing passage 11 - 1.

[0043] In this embodiment, the air - blowing holes 10 are obliquely arranged relative to the tooth side surface 7 of the go - gauge tooth 5.

[0044] By obliquely arranging the air - blowing holes 10 as described above, interference between the drill bit and the adjacent go - gauge tooth 5 during drilling of the air - blowing holes 10 can be avoided.

[0045] In this embodiment, a pneumatic pipe joint 17 is arranged at the orifice of the axial air - blowing passage 11 - 2 on the end surface of the toothed detection ring 4, and each pneumatic pipe joint 17 is correspondingly connected to each pneumatic output port 13 of the multi - way reversing and switching valve group 12 through a pipeline 21.

[0046] In this embodiment, a positioning hole 18 is arranged on the detection seat 3, a positioning stop 19 is arranged on the lower end surface of the toothed detection ring 4, and the toothed detection ring 4 is positioned on the positioning hole 18 of the detection seat 3 through the positioning stop 19 and fixed by a screw 22.

[0047] In order to improve the detection accuracy, a stator core slot detection device in this embodiment is also provided with a detection and calibration gauge (not shown in the figure) that is matched with the pneumatic slot side - clearance detection module 9. The cross - sectional shape and size of the slot of the detection and calibration gauge are the same as the theoretical design cross - sectional shape and size of the slot of the stator core 1.

[0048] Preferably, the slot of the detection and calibration gauge is formed by wire - cutting.

[0049] Preferably, the detection and calibration gauge includes a calibration go - gauge and a calibration no - go gauge.

[0050] In this embodiment, the multi - way reversing and switching valve group 12 and the pneumatic gauge 15 are respectively connected to a controller.

[0051] In order to improve the detection accuracy, before the formal detection, the calibration go - gauge and the calibration no - go gauge can be used as simulation detection parts (stator core 1) for calibration detection to achieve the purpose of calibrating and compensating the accuracy of the pneumatic gauge 15. After the calibration detection, the formal detection of the slots 20 of the stator core 1 is carried out.

[0052] During detection, each slot 20 of the stator core 1 is correspondingly sleeved over each go gauge tooth 5 of the toothed detection ring 4 and is stably seated on the detection seat 3. The multi-way reversing valve group 12 and the pneumatic gauge 15 are opened through the controller, and the widths of the slots 20 of the stator core 1 are detected in sequence. When the width of the slot 20 is out of tolerance, the controller issues an alarm reminder, and the position of the out-of-tolerance slot 20 is displayed on the display screen of the controller.

[0053] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A stator core slot detection device, characterized in that: It includes a detection workbench and a detection seat arranged on the detection workbench, and a toothed detection ring arranged on the upper end surface of the detection seat. A number of through-gauge teeth for detecting the stator core wire slots are circumferentially distributed on the outer circle of the toothed detection ring. The tooth shape of the through-gauge teeth includes a tooth top surface located at the top of the through-gauge teeth, tooth side surfaces located on both sides of the through-gauge teeth, and a tooth root with a contracted neck shape. Gaps are arranged between the tooth top surface, tooth side surfaces and tooth root of the through-gauge teeth and the wire slots of the stator core.

2. A stator core slot detection device according to claim 1, characterized in that: A pneumatic slot side clearance detection module for quickly detecting the width of the stator core slot is also provided; the pneumatic slot side clearance detection module comprises blowing holes symmetrically arranged on the tooth side surfaces on both sides of the through gauge teeth, and an air blowing passage arranged inside the through gauge teeth and connected to the blowing holes on both sides of the through gauge teeth; the air blowing passages on each of the through gauge teeth are respectively connected to the corresponding pneumatic output ports of the multi-way reversing switching valve group through pipelines, and the pneumatic input port of the multi-way reversing switching valve group is connected to the pneumatic measuring instrument through a pipeline.

3. A stator core slot detection device according to claim 2, characterized in that: The air blowing passage comprises a radial air blowing passage arranged inside the through gauge teeth along the radial direction of the toothed detection ring and connected to the air blowing holes on both sides of the through gauge teeth, and an axial air blowing passage arranged on the end surface of the toothed detection ring and connected to the radial air blowing passage; the multi-way reversing switching valve group is a one-input-multi-output multi-way reversing switching valve group having one pneumatic input port and multiple pneumatic output ports; each of the axial air blowing passages is correspondingly connected to each pneumatic output port of the multi-way reversing switching valve group through a pipeline.

4. A stator core slot detection device according to claim 3, characterized in that: The multi-way directional switching valve group is a rotary multi-way directional switching valve group.

5. A stator core slot detection device according to claim 3, characterized in that: The tooth top surface of the gauge tooth is drilled to form the radial air blowing passage, and a plug is provided at the drill hole opening of the tooth top surface. The end surface of the toothed detection ring is drilled to form an axial air blowing passage connected to the radial air blowing passage.

6. A stator core slot detection device according to claim 2, characterized in that: The blowing hole is arranged obliquely relative to the tooth side surface of the standard gauge tooth.

7. A stator core slot detection device according to claim 3, characterized in that: A pneumatic pipe joint is provided at the mouth of the axial air blowing passage on the end surface of the toothed detection ring, and each of the pneumatic pipe joints is correspondingly connected to each pneumatic output port of the multi-way reversing switching valve group through a pipeline.

8. A stator core slot detection device according to claim 2, characterized in that: The detection seat is provided with a positioning hole, and the lower end surface of the toothed detection ring is provided with a positioning stop. The toothed detection ring is positioned on the positioning hole of the detection seat through the positioning stop and is fixed by screws.

9. A stator core slot detection device according to claim 2, characterized in that: A detection calibration gauge matched with the pneumatic wire slot side clearance detection module is also provided, and the wire slot cross-sectional shape and size of the detection calibration gauge are the same as the theoretically designed wire slot cross-sectional shape and size of the stator core.

10. A stator core slot detection device according to claim 9, characterized in that: The wire groove for the detection and calibration standard is a wire groove formed by wire cutting.

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