CN210041479U - Rotor punching sheet positioning structure - Google Patents

Abstract

The utility model discloses a rotor punching sheet location structure. The rotor punching positioning structure comprises a rotor punching, wherein the rotor punching is provided with a central shaft hole and N guide bar grooves which are uniformly distributed on the periphery of the rotor punching in the radial direction, and N is an integer; the central shaft hole inner wall has evenly arranged M grooves, one in M grooves is the constant head tank, and remaining M-1 grooves are semi-circular keyway, wherein: n is an integer multiple of M, and M is an integer not less than 3. The utility model provides an present rotor punching fold and press during manufacturing, high one side that rotor core appears is low on one side, causes to fold and presses the coefficient to be littleer, influences this kind of hidden danger of motor performance.

Description

Rotor punching sheet positioning structure

Technical Field

The utility model relates to a rotor punching sheet location structure belongs to electric motor rotor processing field.

Background

The rotor is an extremely important component of the traction motor, and the rotor core made of laminated silicon steel sheets is most important. The quality of the lamination effect of the rotor core directly influences the performance of the traction motor.

In the related patents at present, a positioning groove and a key groove are symmetrically arranged at a central shaft hole of a rotor punching sheet of a traction motor, and the relative position of the lamination is determined by the positioning groove of the central shaft hole of the rotor punching sheet in the lamination process. The hidden trouble of doing so is that if the supplier does not have the switching punching in the iron core punching process, under the condition that the positioning groove is fixed, the limitation is that the raw material silicon steel sheet has certain uneven thickness, the rotor core that the rotor punching that punches out was folded under this prerequisite has highly inhomogeneous to fold the pressure coefficient and be slightly less, can play the discount to traction motor's performance effect greatly.

How to better solve the hidden troubles is an important research content of the utility model.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rotor punching sheet positioning structure which can solve the hidden trouble that the motor performance is influenced because the rotor core has a higher side and a lower side in the current rotor punching sheet laminating manufacturing, which causes the laminating coefficient to be smaller,

in order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a rotor punching sheet positioning structure comprises:

the rotor punching sheet is provided with a central shaft hole and N guide strip grooves which are uniformly distributed on the periphery of the rotor punching sheet in the radial direction, wherein N is an integer; the structure is characterized in that:

the central shaft hole inner wall has evenly arranged M grooves, one in M grooves is the constant head tank, and remaining M-1 grooves are semi-circular keyway, wherein:

n is an integer multiple of M, and M is an integer not less than 3.

From this, this kind of structure can let rotor core fold and press more evenly, has avoided the iron core finished product height unevenness to appear, has improved the pressure coefficient of folding of iron core, makes the traction motor performance of making out more excellent.

According to the utility model discloses an embodiment, can also be right the utility model discloses do further optimization, following for optimizing the technical scheme who forms afterwards:

in one preferred embodiment, N is an integer multiple of 12.

In order to facilitate the key matching of the groove and the rotating shaft in the rotating process, the depth and the width of the positioning groove and the semicircular key groove can be matched with the key on the rotating shaft.

According to the preferred embodiment of the present invention, the groove depth of the positioning groove and the semicircular key groove is equal, and/or the groove opening width of the positioning groove and the semicircular key groove is equal.

Preferably, the positioning groove is a square groove.

In order to be matched with the key on the rotating shaft conveniently, the bottom of the positioning groove is chamfered.

Preferably, M is 3 or 4 or 6. The best scheme is that M is 4, promptly the utility model discloses a four grooves of rotor punching location structure's central shaft hole pore wall evenly distributed, one of them square groove and three half slot.

In order to reduce weight and have a heat dissipation function, a plurality of heat dissipation holes are formed in the rotor punching sheet.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses stopped the rotor towards the hidden danger that the piece was punched towards the iron core towards the piece by the uneven and not switching-over punching of raw and other materials thickness of supplier, can make rotor core fold and press more evenly, avoid the iron core finished product to appear high phenomenon low on one side, make folding of iron core press the coefficient higher, the traction motor performance of making like this out is more excellent.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

The utility model provides a rotor punching location structure, includes rotor punching 1, and it has central shaft hole 2 and evenly arranges N conducting bar groove 3 at radial setting in rotor punching 1 periphery, and wherein N is the integer.

The 2 inner walls in central shaft hole have evenly arranged M grooves, one in M grooves is the constant head tank, and remaining M-1 grooves are semi-circular keyways, wherein: n is an integer multiple of M, and M is an integer of not less than 3, preferably 3 or 4 or 6. Generally, N is an integer multiple of 12.

The present embodiment is described below by taking N =48 and M =4 as an example.

As shown in fig. 1, four keyways A, B, C, D are uniformly distributed at the central shaft hole 2 of the rotor sheet 1, wherein a is a square positioning slot, B, C, D is a semicircular keyway, and the widths and depths of the four slots are equal. The four grooves can be matched with keys arranged on the rotating shaft. Wherein the groove bottom of the square positioning groove is chamfered, and two adjacent grooves are at an angle of 90 degrees and are uniformly distributed along the circumference of the shaft hole. 12 heat dissipation holes 4 are uniformly arranged on the rotor punching sheet 1.

48 guide bar grooves 3 are uniformly arranged on the periphery of the whole rotor punching sheet 1, and each guide bar groove 3 is radially arranged.

In the embodiment, the rotor punching sheet 1 is laminated on a tool which is provided with a key and a rotating shaft in advance, the positioning groove A is used as a starting point, the positioning groove A is matched with the key, and the rotating shaft is sleeved in the central shaft hole 2 and laminated for 20 mm; the rotor punching sheet 1 rotates clockwise by 90 degrees, the groove D rotates to the position of the positioning groove A, the key groove D is matched with the key, and the rotor punching sheet 1 is laminated by 20 mm; rotor punching 1 clockwise rotation 90, keyway C is rotatory to keyway D position, keyway C and key cooperation, and rotor punching 1 continues to fold and presses. By analogy, the rotor punching sheet 1 is pressed by 20mm at each time, the relative tool rotates by 90 degrees clockwise until the rotor punching sheet 1 is pressed by the pressure until the requirement of the height of the iron core is met.

In order to identify and confirm whether the rotor punching sheet 1 rotates 90 degrees relative to the tool for reversing and laminating, when the rotor punching sheet 1 rotates once every time the rotor punching sheet 1 is laminated by 20mm, the rotation angle of the rotor punching sheet 1 can be determined by identifying the position direction of the positioning groove A.

In the embodiment, under the condition of positioning of the tooling, when the rotor punching sheet 1 is laminated, the rotor punching sheet rotates clockwise to be reversed and laminated by the thickness of each 20mm lamination through the position relation of the square groove in the four positioning key grooves.

Through four keyways that rotor punching 1 central shaft hole 2 was evenly arranged, under the frock location circumstances, can make things convenient for in rotor punching 1 fold and press to rotatory certain angle when certain thickness and continue to fold and press, wherein square location keyway is whether relative rotation for confirming rotor punching 1 uses the frock as the reference, fold like this and press the mode and can avoid the uneven problem that causes the rotor core finished product to appear highly inconsistent of thickness of rotor punching 1 itself to also avoided folding the pressure coefficient to be little, reduced the influence to traction motor performance.

The above-mentioned embodiments are illustrative and should not be construed as limiting the scope of the invention, which is defined by the appended claims, and all modifications of the equivalent forms of the present invention which are obvious to those skilled in the art after reading the present invention.

Claims (8)

1. A rotor punching sheet positioning structure comprises:

the rotor punching sheet (1) is provided with a central shaft hole (2) and N guide bar grooves (3) which are uniformly distributed on the periphery of the rotor punching sheet (1) in the radial direction, wherein N is an integer; the method is characterized in that:

a plurality of M grooves are uniformly distributed on the inner wall of the central shaft hole (2), one of the M grooves is a positioning groove, and the rest M-1 grooves are semicircular key grooves, wherein:

n is an integer multiple of M, and M is an integer not less than 3.

2. The rotor punching positioning structure as recited in claim 1, wherein N is an integer multiple of 12.

3. The rotor punching positioning structure as claimed in claim 1, wherein the depth and width dimensions of the positioning groove and the semicircular key groove are both matched with the key on the rotating shaft.

4. The rotor punching positioning structure according to claim 1, wherein the positioning groove and the semicircular key groove have the same groove depth, and/or the width of the notch of the positioning groove and the semicircular key groove is the same.

5. The rotor punching positioning structure according to any one of claims 1 to 4, wherein the positioning groove is a square groove.

6. The rotor punching positioning structure according to claim 5, wherein the groove bottom of the positioning groove is chamfered.

7. The rotor punching positioning structure according to any one of claims 1 to 4, wherein M is 3, 4 or 6.

8. The rotor punching positioning structure according to any one of claims 1 to 4, wherein a plurality of heat dissipation holes (4) are formed in the rotor punching (1).

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