Double-cage-bar rotor mechanism

Abstract

The utility model provides a double-cage-bar rotor mechanism, which comprises a rotor body, inner cage bars, inner end rings, outer end rings, outer cage bars and rotor tooth pressure plates, the rotor tooth pressure plates are clamped at two ends of an iron core of the rotor body, the inner cage bars are assembled in rectangular grooves of the iron core of the rotor body, the two inner end rings are respectively assembled at two ends of the inner cage bars, and the outer end rings are respectively assembled at two ends of the outer cage bars. The outer cage bar is assembled in an iron core rectangular groove of the rotor body, two ends of the outer cage bar are respectively fixed by two outer end rings, each outer end ring comprises a ring body and a plurality of outer cage bar holes, the plurality of outer cage bar holes are circumferentially arranged on the ring body, and the axial cross section of the ring body is of a U-shaped structure. According to the double-cage-bar rotor mechanism designed by the utility model, the production cost of the motor is reduced, the stability and the safety of the motor are improved, the outer end ring, the inner end ring and the rotor tooth pressing plate are mounted in a matched manner, the distance is shortened, the outer cage bars are prevented from being twisted off, and the maintenance cost of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flameproof asynchronous motor manufacturing, in particular to a double-cage rotor mechanism. Background Art

[0002] As an asynchronous motor, the core content is starting performance, overload performance and safety. In order to improve the starting performance of the motor and reduce the starting current, the manufacturer will design a double-cage rotor. The traditional double-cage rotor structure is as follows: (1) The cage bar is long, which increases the manufacturing cost; (2) The distance between the rotor tooth pressure plate and the end ring is too large, which easily causes the outer cage bar to twist and break. In order to save costs, reduce the risk of outer cage bar breakage, and increase the life of the motor, it is necessary to improve to the traditional double-cage rotor structure. Summary of the invention

[0003] The utility model aims to provide a double-cage rotor mechanism.

[0004] A double-cage bar rotor mechanism comprises a rotor body, inner cage bars, inner end rings, outer end rings, outer cage bars and a rotor tooth pressure plate, wherein the rotor tooth pressure plate is clamped at both ends of the iron core of the rotor body, the inner cage bars are fitted in the iron core rectangular grooves of the rotor body, two inner end rings are respectively fitted at both ends of the inner cage bars, the outer cage bars are fitted in the iron core rectangular grooves of the rotor body, the two ends of the outer cage bars are respectively fixed by two outer end rings, the outer end ring comprises a ring body and outer cage bar holes, a plurality of outer cage bar holes are arranged circumferentially on the ring body, and the axial section of the ring body is a U-shaped structure.

[0005] Preferably, the edge of the inner end ring is a toothed structure, and the two end portions of the inner cage bar are clamped in the gap between each adjacent tooth.

[0006] Preferably, the rotor tooth pressure plate includes a tooth pressure plate body and a plurality of closed grooves, wherein the closed grooves are used to cooperate with the groove shape of the motor rotor punching sheet, and the closed grooves are composed of a large semicircular structure at the upper end, a small semicircular structure at the lower end and a trapezoidal structure, and the trapezoidal structure is connected between the large semicircular structure at the upper end and the small semicircular structure at the lower end.

[0007] The double-cage-bar rotor mechanism designed in the utility model has an outer end ring whose ring body has an axial cross-section of a U-shaped structure, and the inner end ring is clamped inside the outer end ring. The structural design of the outer end ring and the inner end ring shortens the length of the inner and outer cage bars, reduces the production cost of the motor, and improves the stability and safety of the motor. The outer end ring, the inner end ring and the rotor tooth pressure plate are installed in coordination with each other, and the distance is shortened, which avoids the outer cage bars from being twisted off and reduces the maintenance cost of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the double-cage rotor mechanism and the motor shaft;

[0009] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0010] Figure 3 is a schematic diagram of the outer end ring structure;

[0011] Figure 4 for Figure 3 Schematic diagram of the structure from the perspective of the middle BB;

[0012] Figure 5 It is a schematic diagram of the inner end ring structure;

[0013] Figure 6 It is a schematic diagram of the rotor gear pressure plate structure;

[0014] In the figure: rotor body 1, inner cage bar 2, inner end ring 3, outer end ring 4, ring body 40, outer cage bar hole 41, outer cage bar 5, rotor tooth pressure plate 6, tooth pressure plate body 60, closed groove 61, gap a, tooth b, large semicircular structure c at the upper end, small semicircular structure d at the lower end, trapezoidal structure e. DETAILED DESCRIPTION

[0015] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model is now clearly and completely described in the form of specific embodiments in combination with the accompanying drawings.

[0016] Please also see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A double-cage-bar rotor mechanism includes a rotor body 1, inner cage bars 2, inner end rings 3, outer end rings 4, outer cage bars 5 and rotor tooth pressure plates 6. The rotor tooth pressure plates 6 are clamped at both ends of the iron core of the rotor body 1. The inner cage bars 2 are mounted in the iron core rectangular grooves (not shown) of the rotor body 1. Two inner end rings 3 are respectively mounted at both ends of the inner cage bars 2. The outer cage bars 5 are mounted in the iron core rectangular grooves of the rotor body 1. The two ends of the outer cage bars 5 are respectively fixed by two outer end rings 4. The outer end ring 4 includes a ring body 40 and outer cage bar holes 41. A plurality of outer cage bar holes 41 are arranged circumferentially on the ring body 40. The axial cross-section of the ring body 40 is a U-shaped structure.

[0017] The edge of the inner end ring 3 is a toothed structure, and the end of the inner cage bar 2 is clamped in the gap a between each adjacent tooth b.

[0018] The rotor tooth pressure plate 6 includes a tooth pressure plate body 60 and a plurality of closed grooves 61. The closed grooves 61 are used to cooperate with the groove shape of the motor rotor punching sheet. The closed grooves 61 are composed of a large semicircular structure c at the upper end, a small semicircular structure d at the lower end and a trapezoidal structure e. The trapezoidal structure e is connected between the large semicircular structure c at the upper end and the small semicircular structure d at the lower end.

[0019] The rotor tooth pressure plate 6 is clamped at both ends of the core of the rotor body 1 to fix it, the inner cage bar 1 is installed in the rectangular groove of the core of the rotor body 1, and the inner end ring 3 is welded at both ends of the inner cage bar 2 with a silver welding rod to fix it. The double cage bar rotor mechanism designed by the utility model has an axial cross-section of the ring body 40 of the outer end ring 4 as a U-shaped structure, and the inner end ring 3 is clamped in the outer end ring 4. The structural design of the outer end ring 4 and the inner end ring 3 shortens the length of the inner cage bar 2 and the outer cage bar 5, reduces the production cost of the motor, and improves the stability and safety of the motor. The outer end ring, the inner end ring and the rotor tooth pressure plate are installed in coordination, and the distance is shortened, which avoids the twisting of the outer cage bar and reduces the maintenance cost of the motor.

[0020] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A double-cage rotor mechanism, characterized in that: The double-cage-bar rotor mechanism includes a rotor body, inner cage bars, inner end rings, outer end rings, outer cage bars and rotor tooth pressure plates. The rotor tooth pressure plates are clamped at both ends of the iron core of the rotor body. The inner cage bars are mounted in the rectangular grooves of the iron core of the rotor body. The two inner end rings are respectively mounted at both ends of the inner cage bars. The outer cage bars are mounted in the rectangular grooves of the iron core of the rotor body. The two ends of the outer cage bars are respectively fixed by two outer end rings. The outer end ring includes a ring body and outer cage bar holes. Several outer cage bar holes are arranged circumferentially on the ring body. The axial cross-section of the ring body is a U-shaped structure.

2. The double-cage rotor mechanism according to claim 1, characterized in that: The edge of the inner end ring is a toothed structure, and two end portions of the inner cage bar are clamped in the gap between each adjacent tooth.

3. The double-cage rotor mechanism according to claim 2, characterized in that: The rotor tooth pressure plate includes a tooth pressure plate body and a plurality of closed grooves. The closed grooves are used to cooperate with the groove shape of the motor rotor punching sheet. The closed grooves are composed of a large semicircular structure at the upper end, a small semicircular structure at the lower end and a trapezoidal structure. The trapezoidal structure is connected between the large semicircular structure at the upper end and the small semicircular structure at the lower end.

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