Permanent magnet motor rotor punching sheet with good stability

Abstract

The utility model provides a permanent magnet motor rotor punching sheet with good stability, belongs to the technical field of motors, and solves the problem that the conventional rotor punching sheets are stacked in a staggered manner due to smooth surfaces. A clamping groove is formed in the dead center of the punching sheet body, the punching sheet body is provided with a pole shoe, magnetic steel is installed in the pole shoe, the punching sheet body is provided with positioning blocks, positioning grooves are formed between the positioning blocks, the positioning blocks are arranged at the two ends of the punching sheet body, the positioning blocks are provided with reinforcing strips, and the positioning grooves are provided with corresponding grooves. A first round hole and a second round hole are formed between the positioning block and the positioning groove, convex rings are arranged at the two ends of the first round hole, annular grooves are formed in the two ends of the second round hole, and the first round hole and the second round hole are arranged at intervals. The punching sheet has the advantages that the positioning blocks and the positioning grooves are arranged on the punching sheet main body, and dislocation of the punching sheet main body is limited through clamping of the positioning blocks and the positioning grooves; the positioning blocks are arranged at two ends of the punching sheet body, thereby facilitating continuous stacking of the punching sheet body.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field relates to a rotor lamination, especially to a permanent magnet motor rotor lamination with good stability. BACKGROUND

[0002] Motor refers to the electromagnetic device that realizes electric energy conversion or transmission according to electromagnetic induction law, and the rotor core is an important component of the motor, responsible for outputting the torque generated in the motor, and the rotor core is formed by stacking rotor laminations.

[0003] The existing rotor lamination is prone to misalignment during stacking due to its smooth surface. During the stacking process, the rotor lamination is prone to misalignment, and during the transportation of the rotor lamination, the misaligned rotor lamination is prone to sliding due to movement, which may cause the stacked rotor laminations to collapse, resulting in unstable stacking of the rotor laminations. SUMMARY

[0004] The utility model discloses a kind of permanent magnet motor rotor laminations that can effectively position, prevent rotor lamination misalignment, to solve the problems existing in prior art.

[0005] The utility model can be implemented by the following technical solutions: a permanent magnet motor rotor lamination with good stability, including lamination main part, the lamination main part is centrally provided with a clamping groove, the lamination main part is provided with pole shoe, the pole shoe is installed with magnetic steel, the lamination main part is provided with positioning block, the positioning block is provided with positioning groove, the positioning block and positioning groove are provided with round hole one and round hole two, the round hole one is provided with convex ring at both ends, the round hole two is provided with ring groove at both ends, and the round hole one and the round hole two are arranged along the circumference.

[0006] In the permanent magnet motor rotor lamination with good stability described above, grooves are provided between the pole shoes, the groove bottom is provided with a circular arc, and a horizontal groove is provided in the groove.

[0007] In the permanent magnet motor rotor lamination with good stability described above, the positioning block is arranged at both ends of the lamination main part.

[0008] In the permanent magnet motor rotor lamination with good stability described above, the thickness of the positioning block is 0.5 times the thickness α of the lamination main part, and the positioning groove penetrates the lamination main part.

[0009] In the permanent magnet motor rotor lamination with good stability described above, reinforcing bars are provided on the positioning block, and corresponding grooves are provided on the positioning groove.

[0010] In the permanent magnet motor rotor lamination with good stability described above, a plurality of heat dissipation grooves are provided on the outer side of the round hole one and the round hole two, and the heat dissipation grooves gradually increase from the inside to the outside.

[0011] In the permanent magnet motor rotor lamination with good stability, the number of the clamping grooves is four, and the clamping grooves are distributed along the circumference.

[0012] Compared with the prior art, the permanent magnet motor rotor lamination with good stability has the advantages that the positioning blocks are arranged on the lamination body, and the corresponding positioning grooves are arranged on the lamination body, so that the lamination body is clamped with each other through the positioning blocks and the positioning grooves, and the lamination body is prevented from being misaligned during stacking; the thickness of the positioning block is set as half of the thickness of the lamination body, so that the plurality of lamination bodies are clamped with each other, and the stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a perspective view of the permanent magnet motor rotor lamination with good stability;

[0014] Fig. 2 is a side view of the permanent magnet motor rotor lamination with good stability;

[0015] Fig. 3 is a sectional view of the assembly of the permanent magnet motor rotor lamination with good stability;

[0016] Wherein, 1, lamination body; 11, pole shoe; 111, groove; 112, circular arc; 113, transverse groove; 12, magnetic steel; 13, clamping groove; 2, positioning block; 21, reinforcing strip; 3, positioning groove; 31, force receiving groove; 4, round hole one; 41, protruding ring; 5, round hole two; 51, ring groove; 6, heat dissipation groove. DETAILED DESCRIPTION

[0017] The following is a specific embodiment of the utility model and is further described in combination with the drawings, but the utility model is not limited to these embodiments.

[0018] As Figs. 1 to 3 shown, the utility model can be realized through the following embodiments: a permanent magnet motor rotor lamination with good stability, comprising a lamination body 1, the lamination body 1 is provided with a clamping groove 13 in the center, the lamination body 1 is provided with a pole shoe 11, the pole shoe 11 is provided with a magnetic steel 12, the lamination body 1 is provided with a positioning block 2, the positioning block 2 is provided with a positioning groove 3, the positioning block 2 and the positioning groove 3 are provided with a round hole one 4 and a round hole two 5, the round hole one 4 is provided with a protruding ring 41 at both ends, the round hole two 5 is provided with a ring groove 51 at both ends, and the round hole one 4 and the round hole two 5 are arranged along the circumference.

[0019] The positioning block 2 and the positioning groove 3 are clamped with each other to limit the dislocation of the punch body 1 due to small friction force; the positioning groove 3 is arranged between the positioning blocks 2, so that the positioning block 2 and the positioning groove 3 are staggered, and when the punch body 1 rubs against each other, the force borne by the positioning block 2 and the positioning groove 3 is more uniform, thereby improving the stability; the circular hole one 4 and the circular hole two 5 are arranged for inserting the rivet, the convex ring 41 and the ring groove 51 are clamped with each other, which is used for assisting the positioning of the positioning block 2 and the positioning groove 3, and the rotor punch sheet is more closely fitted.

[0020] As shown in the figure, the grooves 111 are arranged between the pole shoes 11, the bottom of the groove 111 is provided with a circular arc 112, and the groove 111 is provided with a horizontal groove 113. The groove 111 is arranged to reduce the weight of the punch body 1, and when the rotor rotates, the air in the air gap can be stirred to assist heat dissipation; the arrangement of the circular arc 112 makes the excessive distance between the pole shoes 11 not abrupt and sharp, and reduces the magnetic hysteresis; the arrangement of the horizontal groove 113 facilitates workers to assemble the rotor punch sheet by gripping the groove 111, and prevents the rotor punch sheet from falling off accidentally during assembly.

[0021] As shown in the figure, the positioning block 2 is arranged at both ends of the punch body 1. The punch body 1 is provided with the positioning block 2 at both ends, which facilitates continuous assembly and stacking of the punch body 1, and prevents the adjacent punch body 1 from being dislocated due to low friction coefficient; only one end of the punch body 1 at both ends of the rotor core is provided with the positioning block 2.

[0022] As shown in the figure, the thickness of the positioning block 2 is 0.5 times the thickness α of the punch body 1, and the positioning groove 3 penetrates the punch body 1. The thickness of the positioning block 2 is half of the thickness of the punch body 1, and the thickness of the positioning groove 3 is the same as the thickness α of the punch body 1, so that two positioning blocks 2 can be accommodated in the positioning groove 3, so that the punch body 1 can be clamped with the punch body 1 at the upper and lower ends, thereby improving the stability of the stacked rotor core.

[0023] As shown in the figure, the positioning block 2 is provided with a reinforcing strip 21, and the positioning groove 3 is provided with a corresponding force receiving groove 31. The reinforcing strip 21 and the force receiving groove 31 cooperate to assist the positioning block 2 and the positioning groove 3 to offset the circumferential force generated when the punch body 1 rotates, and to improve the strength of the positioning block 2, thereby preventing the positioning block 2 from being distorted due to excessive force.

[0024] As shown in the figure, a plurality of heat dissipation grooves 6 are arranged outside the circular hole one 4 and the circular hole two 5, and the heat dissipation grooves 6 gradually increase from inside to outside. The heat dissipation grooves 6 are used for ventilation and heat dissipation inside the punch body 1 and for weight reduction, and the heat dissipation grooves 6 gradually increase outwardly to keep the weight of the rotor punch sheet uniform, reduce the influence of centrifugal force on the punch body 1 when rotating, and thereby reduce the radial runout of the rotor core.

[0025] As shown in the figure, the number of the clamping grooves 13 is four, and the clamping grooves 13 are distributed at intervals along the circumference. The clamping grooves 13 are used for abutting the rotating shaft, so that the rotating shaft is more fitted with the rotor core, and the torque is transmitted through the contact between the rotating shaft and the clamping grooves 13; because the punching piece bodies 1 are stacked with a 90-degree offset, the number of the clamping grooves 13 is four and the clamping grooves 13 are distributed at intervals along the circumference, which facilitates the installation of the rotating shaft.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0027] Although various terms are used frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A rotor lamination for a permanent magnet motor with good stability, comprising a lamination body (1), wherein a slot (13) is provided at the center of the lamination body (1), a pole shoe (11) is provided on the lamination body (1), and a magnet (12) is installed in the pole shoe (11), characterized in that: The positioning block (2) is arranged on the punch body (1), positioning grooves (3) are arranged between the positioning blocks (2), round holes (4) and round holes (5) are arranged between the positioning blocks (2) and the positioning grooves (3), convex rings (41) are arranged at the two ends of the round holes (4), ring grooves (51) are arranged at the two ends of the round holes (5), and the round holes (4) and the round holes (5) are arranged along the circumference at intervals.

2. A permanent magnet motor rotor lamination with good stability according to claim 1, characterized in that, The pole shoe (11) is provided with a groove (111), the bottom of the groove (111) is provided with a circular arc (112), and the groove (111) is provided with a horizontal groove (113).

3. A permanent magnet motor rotor lamination with good stability according to claim 1, characterized in that, The positioning block (2) is arranged at the two ends of the punch body (1).

4. The permanent magnet motor rotor lamination with good stability according to claim 1, characterized in that, The thickness of the positioning block (2) is 0.5 times the thickness alpha of the punch body (1), and the positioning groove (3) penetrates the punch body (1).

5. A permanent magnet motor rotor lamination with good stability according to claim 1, characterized in that, The positioning block (2) is provided with a reinforcing strip (21), and the positioning groove (3) is provided with a corresponding bearing groove (31).

6. A permanent magnet motor rotor lamination with good stability according to claim 1, characterized in that, The round holes (4) and the round holes (5) are provided with a plurality of heat dissipation grooves (6) outside, and the heat dissipation grooves (6) gradually increase from inside to outside.

7. A permanent magnet motor rotor lamination with good stability according to claim 1, characterized in that, The number of the clamping grooves (13) is four, and the clamping grooves (13) are distributed at intervals along the circumference.

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