Motor stator punching sheet locking and fixing die

Abstract

The utility model discloses a motor stator punching sheet locking and fixing die which comprises a positioning ring, stroke grooves arranged in the positioning ring, a locking block arranged in each stroke groove, a locking lower limit abutting limiting structure, a locking upper limit elastic limiting structure and a linear cutting clamping groove arranged in the positioning ring. The linear cutting clamping and embedding grooves correspond to the stroke grooves in a one-to-one mode, special-shaped spring pieces are arranged in the linear cutting clamping and embedding grooves, the two ends, in the length direction, of the special-shaped spring pieces stretch out of the linear cutting clamping and embedding grooves, enter the stroke grooves and abut against the rear ends of the locking blocks, and the positioning ring is provided with connecting parts in the linear cutting clamping and embedding grooves. The relative precision of the fixing position of each special-shaped spring piece is higher, the precision error generated by a complex linkage structure is reduced, and the fixing precision of the stator punching sheet is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould structure, in particular to a motor stator punching sheet locking and fixing mould. BACKGROUND

[0002] The electric automobile is the vehicle that uses the vehicle-mounted power supply as power, uses the motor to drive the wheel to travel, and meets the requirements of the composite road traffic, safety regulations. Because the influence on the environment is relatively small than traditional car, therefore has the extensive market prospect.

[0003] The motor is the power unit of the electric automobile, and has the stator and the rotor inside, in the prior art, the stator and the rotor are stacked by the sheet material of stamping cutting, in the process of stacking and blanking, in order to guarantee that the punching sheet is aligned in the height direction, the applicant discloses the Chinese invention patent with the application number of "201810338714.1" in prior art, but it is found in the use process that the adopted spring structure is only fixed by bonding and is easy to fall off after long time use, and the fixing mould is a component in the continuous production line mould, and the replacement is difficult, and the positioning precision in the circumferential direction of the punching sheet is required higher for the stacking and connection of the punching sheet, that is, the position of each limiting portion in the circumferential direction, the spring elasticity and the fixed position are required higher in precision. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a motor stator punching sheet locking and fixing mould, has the advantages of high positioning precision.

[0005] The above technical purpose of the utility model is realized through the following technical scheme: a motor stator punching sheet locking and fixing mould, including the positioning ring, the positioning ring is provided with the stroke groove, the stroke groove is evenly distributed along the circumferential direction of the positioning ring, the stroke dovetail groove is provided with the locking block in each,

[0006] The locking lower limit abutting limiting structure includes the first inclined surface arranged on the inside of the stroke groove, the locking block is provided with the second inclined surface at the corresponding position of the first inclined surface, and the first inclined surface and the second inclined surface are inclined to the inside of the positioning ring.

[0007] The locking upper limit elastic limiting structure includes the wire cutting clamping groove arranged in the positioning ring, the wire cutting clamping groove corresponds to the stroke groove one by one, the wire cutting clamping groove is provided with the special-shaped spring sheet, the two ends of the special-shaped spring sheet in the length direction extend out of the wire cutting clamping groove and enter the stroke groove, and the rear end of the locking block is in abutment, and the positioning ring is provided with the connecting portion in the wire cutting clamping groove.

[0008] Preferably, the profiled spring sheet comprises a left inclined section, a horizontal section and a right inclined section in sequence, the left inclined section and the right inclined section are mirror images with the center of the horizontal section, and the left inclined section and the right inclined section are both outwardly inclined.

[0009] By adopting the above technical scheme, the left inclined section and the right inclined section on both sides of the profiled spring sheet have the effect of rebounding after being stressed, and the locking block is pushed outwards to contact the punching sheet.

[0010] Preferably, one end of the left inclined section and one end of the right inclined section are both arc-shaped transitions between the horizontal section, and the other end of the left inclined section and the other end of the right inclined section are both outwardly curled to form a compression limiting section.

[0011] By adopting the above technical scheme, the arc-shaped transition improves the deformation range during deformation, and the compression limiting section prevents the profiled spring sheet from being flattened in the stroke groove by the locking block.

[0012] Preferably, the wire cutting card slot is arranged in the height direction of the positioning ring, the wire cutting card slot is fixed by friction between the profiled spring sheet, and the two ends of the wire cutting card slot in the length direction are matched with the left inclined section and the right inclined section to be outwardly inclined.

[0013] By adopting the above technical scheme, the wire cutting card slot is bent and deformed only at the position of the wire cutting card slot.

[0014] Preferably, the cross-sectional shape of the compression limiting section is C-shaped.

[0015] By adopting the above technical scheme, the compression limiting section is formed by curling and bending, which is convenient to process.

[0016] Preferably, the connecting part is arranged at the bottom of the middle of the wire cutting card slot, the two ends of the connecting part are respectively connected to the inner side walls of the two wire cutting card slots, and the middle part of the profiled spring sheet is provided with a avoiding slot at the position of the connecting part.

[0017] By adopting the above technical scheme, the connecting part serves to connect the positioning rings on both sides of the wire cutting card slot, and the avoiding slot of the profiled spring sheet cooperates with the same, so that only one profiled spring sheet needs to be arranged in one stroke groove, simplifying installation and processing.

[0018] Preferably, the positioning ring is provided with a replacement slot above the connecting part, and the replacement slot is recessed downward on the upper surface of the positioning ring to the top of the connecting part.

[0019] By adopting the above technical scheme, the profiled spring sheet is better inserted into the wire cutting card slot from the height direction through the replacement slot.

[0020] As preferred, the special-shaped spring sheet is provided with a taking-out hole above the avoiding groove, which corresponds to the position of the replacement groove.

[0021] By adopting the above technical scheme, the taking-out hole is convenient for the operator to act, and the special-shaped spring sheet is taken out from the replacement groove in the height direction.

[0022] As preferred, the bottom of the positioning ring is provided with a guide ring, the top of the guide ring is provided with a guide column, the bottom of the locking block is provided with a guide groove matched with the guide column, and the guide groove extends along the radial direction of the positioning ring.

[0023] By adopting the above technical scheme, the guide ring is an additional part of the mold, and the guide column and the guide groove are matched to guide the movement of the locking block.

[0024] In summary, the punching sheet enters the positioning ring, the locking lower limit abuts against the first inclined surface and the second inclined surface in the limiting structure to limit the maximum moving distance of the locking block outward, that is, the minimum diameter of the locking block capable of locking the punching sheet; the special-shaped spring sheet of the locking upper limit elastic limiting structure is matched with the locking block to provide an elastic force to the locking block, so that the locking block can always be in contact with the outer circumferential surface of the punching sheet to play a role of locking and fixing the punching sheet; meanwhile, compared with the prior art, the wire cutting clamping groove for fixing the special-shaped spring sheet is formed by slow wire cutting, the first has a smaller gap, so that the fixing effect between the wire cutting clamping groove and the special-shaped spring sheet is better, and the second all the wire cutting clamping grooves are formed together, so that the relative accuracy of the fixed positions of the special-shaped spring sheets is higher, the accuracy error caused by the complex linkage structure is reduced, and the fixing accuracy of the stator punching sheet is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of an embodiment;

[0026] Figure 2 is Figure 1 is an enlarged schematic diagram of part A shown in the figure;

[0027] Figure 3 is a top view of an embodiment;

[0028] Figure 4 is Figure 3 is an enlarged schematic diagram of part B shown in the figure;

[0029] Figure 5 is a structural schematic diagram of a special-shaped spring sheet of an embodiment;

[0030] Figure 6 is a sectional schematic diagram of an embodiment;

[0031] In the diagram, 1. Positioning ring; 11. Stroke groove; 12. Connecting part; 13. Replacement groove; 2. Locking block; 21. First inclined surface; 22. Second inclined surface; 3. Wire cutting insert groove; 4. Irregularly shaped spring sheet; 41. Left inclined section; 42. Horizontal section; 43. Right inclined section; 44. Pressing limit section; 45. Clearance groove; 46. Removal hole; 5. Guide ring; 51. Guide post; 52. Guide groove. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0034] Example:

[0035] like Figures 1 to 6 As shown, a motor stator lamination locking and fixing mold includes a positioning ring 1, with a stroke groove 11 provided inside the positioning ring 1. The stroke grooves 11 are evenly distributed along the circumference of the positioning ring 1. Each stroke groove 11 is provided with a locking block 2, which includes a lower locking limit abutment limiting structure and an upper locking elastic limiting structure. The lower locking limit abutment limiting structure limits the maximum outward movement distance of the locking block 2. The upper locking elastic limiting structure pushes the locking block 2 outward. The depth of the stroke groove 11 limits the maximum inward movement distance of the locking block 2.

[0036] like Figures 2 to 6 As shown, the locking lower limit abutment limit structure includes a first inclined surface 21 set on both sides inside the stroke groove 11, and a second inclined surface 22 set at the position corresponding to the first inclined surface 21 of the locking block 2. That is, the locking block 2 is a trapezoidal structure. At the same time, the first inclined surface 21 and the second inclined surface 22 are both inclined towards the inside of the positioning ring 1, which ensures that the locking block 2 can only move outward a certain distance.

[0037] like Figure 5 As shown, the irregularly shaped spring sheet 4 plays the role of elastically pushing the locking block 2. The irregularly shaped spring sheet 4 is formed by bending a spring plate and has elasticity on both sides. Its structure includes a left inclined section 41, a horizontal section 42 and a right inclined section 43 in sequence. The left inclined section 41 and the right inclined section 43 are set in a mirror image with the center of the horizontal section 42. The left inclined section 41 and the right inclined section 43 are both inclined outward. One end of the left inclined section 41 and one end of the right inclined section 43 are arc-shaped transitions with the horizontal section 42.

[0038] like Figure 4 and Figure 5As shown, in order to fix the special-shaped spring sheet 4, the locking upper elastic limiting structure includes the wire cutting clamping groove 3 arranged in the positioning ring 1, the wire cutting clamping groove 3 corresponds to the stroke groove 11 one by one, the wire cutting clamping groove 3 is embedded with the special-shaped spring sheet 4, and the special-shaped spring sheet 4 is fixed in the wire cutting clamping groove 3 through friction; the two ends of the special-shaped spring sheet 4 in the length direction protrude out of the wire cutting clamping groove 3 and enter the stroke groove 11 to abut against the rear end of the locking block 2, and the elastic effect is achieved on the locking block 2.

[0039] As shown in the figure, Figure 2 In order to avoid excessive compression of the special-shaped spring sheet 4 by the locking block 2, the other end of the left inclined section 41 and the other end of the right inclined section 43 are both curled outward to form a compression limiting section 44, the compression limiting section 44 is raised to avoid the left inclined section 41 and the right inclined section 43 of the special-shaped spring sheet 4 being pressed to fit on the bottom of the stroke groove 11, and at the same time, in order to facilitate processing, the cross-sectional shape of the compression limiting section 44 is C-shaped, which is formed by curling, and at the same time, in order to cooperate with the left inclined section 41 and the right inclined section 43, the wire cutting clamping groove 3 is arranged through the height direction of the positioning ring 1, the wire cutting clamping groove 3 is fixed between the wire cutting clamping groove 3 and the special-shaped spring sheet 4 through friction, and the two ends of the wire cutting clamping groove 3 in the length direction are inclined outward in cooperation with the left inclined section 41 and the right inclined section 43.

[0040] As shown in the figure, Figures 2 to 5 In order to avoid the wire cutting clamping groove 3 being completely cut off, the connecting part 12 is arranged in the wire cutting clamping groove 3, the connecting part 12 plays a role in connecting the two sides of the wire cutting clamping groove 3, the connecting part 12 is arranged on the bottom in the middle of the wire cutting clamping groove 3, the two ends of the connecting part 12 are respectively connected to the inner side walls of the two sides of the wire cutting clamping groove 3, and the middle part of the special-shaped spring sheet 4 is provided with an avoiding groove 45 at the position of the connecting part 12.

[0041] As shown in the figure, Figure 4 and Figure 5 In order to facilitate the taking out of the special-shaped spring sheet 4, the positioning ring 1 is provided with a replacement groove 13 above the connecting part 12, the replacement groove 13 is recessed downward on the upper surface of the positioning ring 1 to the top of the connecting part 12, the special-shaped spring sheet 4 is provided with a taking-out hole 46 above the avoiding groove 45, a tool enters the taking-out hole 46, and the taking out of the special-shaped spring sheet 4 is facilitated, and the taking-out hole 46 corresponds to the position of the replacement groove 13.

[0042] As shown in the figure, Figure 6 In order to facilitate the realization of the guidance of the locking block 2, the guiding ring 5 structure is additionally arranged in the embodiment, and the guiding ring 5 can not be actually arranged, the guiding ring 5 is arranged on the bottom of the positioning ring 1, the top of the guiding ring 5 is provided with a guiding column 51, the bottom of the locking block 2 is provided with a guiding groove 52 matched with the guiding column 51, and the guiding groove 52 extends along the radial direction of the positioning ring 1.

[0043] Working principle:

[0044] In the installation process, the blank fixing mold is placed in the mold, then the special-shaped spring sheet 4 is clamped into the wire cutting clamping groove 3 from the height direction, the avoiding groove 45 is aligned with the connecting part 12, then the locking block 2 is placed in the stroke groove 11 one by one, the special-shaped spring is compressed, the second inclined surface 22 of the locking block 2 is in contact with the first inclined surface 21 in the stroke groove 11, which plays a limiting role, and the positioning of the wire cutting clamping groove 3 is more accurate.

Claims

1. A motor stator lamination locking and fixing mold, comprising a positioning ring (1), wherein a stroke groove (11) is arranged in the positioning ring (1), the stroke grooves (11) are uniformly distributed along the circumference of the positioning ring (1), and a locking block (2) is arranged in each stroke groove (11), characterized in that: Comprising The locking lower limit abutting limiting structure comprises first inclined surfaces (21) arranged inside the stroke grooves (11) on both sides, and the locking blocks (2) are provided with second inclined surfaces (22) at positions corresponding to the first inclined surfaces (21), and the first inclined surfaces (21) and the second inclined surfaces (22) are both inclined to the inside of the positioning ring (1); The locking upper limit elastic limiting structure comprises wire cutting clamping grooves (3) arranged in the positioning ring (1), the wire cutting clamping grooves (3) correspond to the stroke grooves (11) one by one, the wire cutting clamping grooves (3) are provided with special-shaped spring sheets (4), the two ends of the special-shaped spring sheets (4) in the length direction protrude into the stroke grooves (11) from the wire cutting clamping grooves (3) and abut against the rear ends of the locking blocks (2), and the positioning ring (1) is provided with connecting portions (12) in the wire cutting clamping grooves (3).

2. The stator lamination locking fixture for electric machines according to claim 1, characterized in that: The special-shaped spring sheet (4) comprises a left inclined section (41), a horizontal section (42) and a right inclined section (43) in sequence, the left inclined section (41) and the right inclined section (43) are mirror images arranged with the center of the horizontal section (42) as the center, and the left inclined section (41) and the right inclined section (43) are both outwardly inclined.

3. The stator lamination locking fixture for electric machines according to claim 2, characterized in that: One end of the left inclined section (41) and one end of the right inclined section (43) are arc-shaped transitions with the horizontal section (42), and the other end of the left inclined section (41) and the other end of the right inclined section (43) are both outwardly curled to form a compression limiting section (44).

4. The stator lamination locking fixture for electric machines according to claim 3, characterized in that: The wire cutting clamping groove (3) is arranged in the height direction of the positioning ring (1), the wire cutting clamping groove (3) is fixed with the special-shaped spring sheet (4) through friction, and the two ends of the wire cutting clamping groove (3) in the length direction are outwardly inclined in cooperation with the left inclined section (41) and the right inclined section (43).

5. The stator lamination locking fixture for electric machines according to claim 3, characterized in that: The cross-sectional shape of the compression limiting section (44) is C-shaped.

6. The motor stator lamination locking fixture of claim 4, wherein: The connecting portion (12) is arranged at the bottom of the middle of the wire cutting clamping groove (3), the two ends of the connecting portion (12) are respectively connected to the inner side walls of the two wire cutting clamping grooves (3), and the middle part of the special-shaped spring sheet (4) is provided with a avoiding groove (45) at the position of the connecting portion (12).

7. The stator lamination locking fixture for electric machines according to claim 6, characterized in that: The positioning ring (1) is provided with a replacement groove (13) above the connecting portion (12), and the replacement groove (13) is recessed downward on the upper surface of the positioning ring (1) to the top of the connecting portion (12).

8. The motor stator lamination locking fixture of claim 6, wherein: The special-shaped spring sheet (4) is provided with a taking-out hole (46) above the avoiding groove (45), and the taking-out hole (46) corresponds to the position of the replacement groove (13).

9. The motor stator lamination locking fixture of claim 1, wherein: The bottom of the positioning ring (1) is provided with a guide ring (5), the top of the guide ring (5) is provided with a guide column (51), the bottom of the locking block (2) is provided with a guide groove (52) matched with the guide column (51), and the guide groove (52) extends along the radial direction of the positioning ring (1).

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