CN220915054U

CN220915054U - Rear cover of solid rotor braking three-phase asynchronous motor

Info

Publication number: CN220915054U
Application number: CN202322821622.8U
Authority: CN
Inventors: 吕晖
Original assignee: Nanjing Special Motor Factory Co ltd
Current assignee: Nanjing Special Motor Factory Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-05-07
Anticipated expiration: 2033-10-20

Abstract

The utility model provides a solid rotor braking three-phase asynchronous motor rear cover which comprises a fixed ring, an inner ring and a limiting ring, wherein the fixed ring is fixedly connected with the inner ring; the fixing rings are uniformly distributed with fixing holes in a surrounding mode, annular protrusions are arranged on the inner side of the upper surface of each fixing ring, and annular grooves are formed on the inner side of the lower surface of each fixing ring; the inner ring is connected with the fixed ring in an arc shape, the thickness of the inner ring is smaller than that of the fixed ring, and the inner ring is connected with the limiting ring in an inclined mode. According to the utility model, the annular protrusions and the annular grooves are additionally arranged on the surface of the fixed ring, so that the contact area between the upper surface and the lower surface of the fixed ring and the air is increased, and the contact area between the inner side of the fixed ring and the air is increased by thickening the fixed ring. The inner ring is connected with the fixed ring in an inclined way, the inner ring is connected with the limiting ring in an inclined way, the connecting cross-section area is increased, the thickness of the inner ring is reduced under the condition of the same connecting strength, and the heat dissipation efficiency of the rear cover is greatly improved.

Description

Rear cover of solid rotor braking three-phase asynchronous motor

Technical Field

The utility model relates to the field of motors, in particular to a rear cover of a solid rotor braking three-phase asynchronous motor.

Background

Three-phase asynchronous motor (Triple-phase asynchronous motor) is a kind of induction motor, which is composed of two basic parts, a fixed stator and a rotating rotor, the rotor is installed in the inner cavity of the stator, and is supported on the front cover and the rear cover by means of bearings.

When the three-phase asynchronous motor works, the motor bearing heats, the internal heat is mainly radiated by the fan at the side of the rear cover, the rear cover of the existing motor is mostly of a flat structure, the space utilization rate is low, the radiating area is small, and the normal operation of the three-phase asynchronous motor is influenced.

Disclosure of Invention

Aiming at the problems, the utility model provides a solid rotor braking three-phase asynchronous motor rear cover.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The solid rotor braking three-phase asynchronous motor rear cover comprises a fixed ring, an inner ring and a limiting ring, wherein the fixed ring is fixedly connected with the inner ring, and the inner ring is fixedly connected with the limiting ring;

the fixing rings are uniformly distributed with fixing holes in a surrounding mode, annular protrusions are arranged on the inner side of the upper surface of each fixing ring, and annular grooves are formed on the inner side of the lower surface of each fixing ring;

The inner ring is connected with the fixed ring in an arc shape, the thickness of the inner ring is smaller than that of the fixed ring, and the inner ring is connected with the limiting ring in an inclined mode.

Preferably, the inner ring is uniformly distributed with reinforcing ribs in a surrounding manner.

Preferably, one end of the reinforcing rib is fixedly connected with the limiting ring, and the other end of the reinforcing rib is fixedly connected with the inner ring.

Preferably, the reinforcing ribs 21 have a triangular pyramid shape, and the outer diameter gradually decreases in a direction away from the stop collar 30.

When the motor is used, the motor rear cover is only required to be arranged on the bearing, the fixed block on the fixed ring is opposite to the fixed hole on the motor shell, and the locking bolt is fixed.

From the above, the utility model has the advantages that: through add annular bulge and annular groove at the solid fixed ring surface, increase solid fixed ring upper surface and lower surface and the area of contact of air, the solid fixed ring of bodiness increases solid fixed ring inboard and the area of contact of air. The inner ring is connected with the fixed ring in an inclined way, the inner ring is connected with the limiting ring in an inclined way, the connecting cross-section area is increased, the thickness of the inner ring is reduced under the condition of the same connecting strength, and the heat dissipation efficiency of the rear cover is greatly improved.

Drawings

Fig. 1 is a top view of a solid rotor braking three-phase asynchronous motor back cover of the present utility model.

Fig. 2 is a bottom view of a rear cover of a solid rotor brake three-phase asynchronous motor according to the present utility model

Fig. 3 is a cross-sectional view of a solid rotor braking three-phase asynchronous motor rear cover of the present utility model.

Description of the embodiments

For a further understanding of the objects, construction, features, and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.

Referring to fig. 1 to 3 in combination, a rear cover of a solid rotor brake three-phase asynchronous motor according to an embodiment of the present utility model includes a fixed ring 10, an inner ring 20 and a limiting ring 30, wherein the fixed ring 10 is fixedly connected with the inner ring 20, and the inner ring 20 is fixedly connected with the limiting ring 30;

The fixing ring 10 is uniformly distributed with fixing holes 11 in a surrounding manner, an annular bulge 12 is arranged on the inner side of the upper surface of the fixing ring 10, and an annular groove 13 is arranged on the inner side of the lower surface of the fixing ring 10;

the connection part of the inner ring 20 and the fixed ring 10 is in arc connection, the thickness of the inner ring 20 is smaller than that of the fixed ring 10, and the inner ring 20 and the limiting ring 30 are in oblique connection.

When the motor is used, the motor rear cover is only required to be arranged on the bearing, the fixed block 11 on the fixed ring 10 is opposite to the fixed hole on the motor shell, and the locking bolt is fixed.

From the above, the utility model has the advantages that: by additionally arranging the annular protrusions 12 and the annular grooves 13 on the surface of the fixed ring 10, the contact area between the upper surface and the lower surface of the fixed ring 10 and the air is increased, and the contact area between the inner side of the fixed ring 10 and the air is increased by thickening the fixed ring 10. The connection part of the inner ring 20 and the fixed ring 101 is in oblique connection, the inner ring 20 and the limiting ring 30 are in oblique connection, the connection cross-section area is increased, the thickness of the inner ring 20 is reduced under the condition of the same connection strength, and the heat dissipation efficiency of the rear cover is greatly improved.

Preferably, the inner ring 20 is uniformly distributed with reinforcing ribs 21.

Preferably, one end of the reinforcing rib 21 is fixedly connected with the limiting ring 30, and the other end of the reinforcing rib 21 is fixedly connected with the inner ring 20.

Preferably, the reinforcing ribs 21 have a triangular pyramid shape, and the outer diameter gradually decreases in a direction away from the stop collar 30. The installation of the reinforcing ribs 21 not only enhances the connection strength of the rear cover and reduces the thickness of the inner cover when reaching the same structural strength, but also increases the contact area between the rear cover and air and improves the heat dissipation efficiency of the rear cover.

The utility model has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. A solid rotor braking three-phase asynchronous motor back cover is characterized in that: comprises a fixed ring (10), an inner ring (20) and a limiting ring (30), wherein the fixed ring (10) is fixedly connected with the inner ring (20), and the inner ring (20) is fixedly connected with the limiting ring (30);

The fixing rings (10) are uniformly distributed with fixing holes (11) in a surrounding mode, annular protrusions (12) are arranged on the inner side of the upper surface of each fixing ring (10), and annular grooves (13) are formed on the inner side of the lower surface of each fixing ring (10); the connecting part of the inner ring (20) and the fixed ring (10) is in arc connection, the thickness of the inner ring (20) is smaller than that of the fixed ring (10), and the inner ring (20) is in oblique connection with the limiting ring (30).

2. The solid rotor braking three-phase asynchronous motor rear cover according to claim 1, wherein: reinforcing ribs (21) are uniformly distributed on the inner ring (20) in a surrounding mode.

3. The solid rotor braking three-phase asynchronous motor rear cover according to claim 2, wherein: one end of the reinforcing rib (21) is fixedly connected with the limiting ring (30), and the other end of the reinforcing rib (21) is fixedly connected with the inner ring (20).

4. The solid rotor braking three-phase asynchronous motor rear cover according to claim 2, wherein: the reinforcing ribs (21) are triangular pyramid-shaped, and the outer diameter of the reinforcing ribs is gradually reduced along the direction away from the limiting ring (30).