CN219372119U - Outer rotor roller and outer rotor motor thereof - Google Patents

Abstract

The utility model relates to the technical field of outer rotor motors, in particular to an outer rotor roller and an outer rotor motor thereof, wherein a cooling channel penetrating through two ends is arranged on a steel cylinder along the axial direction of the steel cylinder.

Description

Outer rotor roller and outer rotor motor thereof

Technical Field

The utility model relates to the technical field of outer rotor motors, in particular to an outer rotor roller and an outer rotor motor thereof.

Background

In the prior art, the steel cylinder of the outer rotor roller is a single layer, the inner layer of the steel cylinder is inlaid with a fixed permanent magnet, the magnetic force line of the outer rotor circulates through the steel cylinder when the device operates and generates eddy current loss, the steel cylinder is heated, some rollers are coated with rubber on the outer layer of the steel cylinder for improving the friction force of a belt, the rubber plate has poor heat conduction and heat dissipation performance, therefore, the steel cylinder cannot radiate well, the whole inner part of the outer rotor roller is heated due to the influence of heating of a stator coil, the steel cylinder is overheated, the outer layer of rubber coating is easy to age and lose efficacy due to the influence of overheat of temperature, the rubber coating is separated, in addition, the permanent magnet is sensitive to temperature, the temperature is too high, irreversible demagnetization risk is caused, meanwhile, the outer rotor needs to generate enough friction force for transmitting torque when conveyed by the belt, the steel cylinder cannot generate deformation, the air gap of the inner rotor and the outer rotor is influenced, vibration and noise are generated when the steel cylinder operates due to the instability of the air gap, and the unstable torque output is unstable, and the performance of the product cannot be fully exerted.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to solve the problems that in the prior art, steel cylinders of an outer rotor roller are all single-layer, the steel cylinders cannot well dissipate heat, so that rubber coating falls off, in addition, a permanent magnet is sensitive to temperature, irreversible demagnetization risks exist due to overhigh temperature, and the steel cylinders are easy to deform to influence air gaps of the inner rotor and the outer rotor, the outer rotor roller and an outer rotor motor thereof are provided.

The technical scheme adopted for solving the technical problems is as follows: an outer rotor roller, a cooling channel penetrating through two ends is arranged on the steel cylinder along the axial direction of the steel cylinder. Compared with the prior art, the scheme has the advantages that the steel cylinder is used for arranging the cavity, heat exchange is carried out through ventilation openings at two ends of the cavity and air communication, the demagnetizing risk of the magnetic steel is reduced, the belt tension can not influence the operation of the outer rotor, the product performance can be fully exerted, and the product operation is more stable.

Preferably, in some embodiments, the steel cylinder comprises an inner cylinder, an outer cylinder and an end cover, the outer cylinder is sleeved outside the inner cylinder, a gap is reserved between the outer cylinder and the inner cylinder, two ends of the outer cylinder and two ends of the inner cylinder are fixedly connected with each other through the end cover, a communicating part communicated with a cavity body is arranged on the end cover, and a cooling channel is formed between the cavity body and the communicating parts on the end covers at two ends of the cavity body. The space between the outer cylinder and the inner cylinder is a cooling channel, so that the contact surface with cold air is increased, and the cooling efficiency is improved.

Preferably, in some embodiments, the communicating portion includes a notch formed on the end cover, where the notch corresponds to and communicates with the cavity.

Preferably, in some embodiments, the notches are several and uniformly distributed along the circumference of the steel cylinder.

Preferably, in some embodiments, a cushion block is fixedly connected between the outer cylinder and the inner cylinder.

In some preferred embodiments, the end cover is provided with a limiting shaft shoulder, the limiting shaft shoulder is propped against the inner peripheral wall of the inner cylinder, and the end cover is fixedly connected with the outer cylinder through a screw.

Preferably, in some embodiments, a sealing ring is arranged between the inner cylinder and the end cover.

Preferably, a plurality of blind holes for installing magnetic steel are formed in the inner peripheral wall of the inner cylinder.

One embodiment of the outer rotor roller is specifically as follows: an external rotor motor comprises a stator assembly, wherein an external rotor roller is rotatably arranged on the peripheral surface of the stator assembly.

The beneficial effects of the utility model are as follows: when the outer rotor roller and the outer rotor motor thereof are used, the steel cylinder is provided with the hollow cavity, and the ventilation openings at the two ends of the hollow cavity are communicated with air for heat exchange, so that the demagnetizing risk of magnetic steel is reduced, the product performance can be fully exerted, the product operation is more stable, and the problems that the steel cylinder of the outer rotor roller is single-layer, the steel cylinder cannot radiate heat well, the rubber coating falls off, and in addition, the permanent magnet is sensitive to temperature and has irreversible demagnetizing risk due to overhigh temperature are avoided.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic three-dimensional structure of the present utility model;

FIG. 2 is a side view of the present utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of B in FIG. 3;

fig. 5 is a schematic three-dimensional structure of an embodiment of the present utility model.

In the figure: 1. steel cylinder, 2, inner cylinder, 3, outer cylinder, 4, end cover, 5, notch, 6, cooling channel, 7, cushion block, 8, spacing shoulder, 9, sealing washer, 10, blind hole.

Detailed Description

The utility model is further described in detail below in connection with the examples:

the present utility model is not limited to the following embodiments, and those skilled in the art can implement the present utility model in various other embodiments according to the present utility model, or simply change or modify the design structure and thought of the present utility model, which fall within the protection scope of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Example 1

As shown in fig. 1-4, an outer rotor roller comprises a steel cylinder 1, the steel cylinder 1 comprises an inner cylinder 2, an outer cylinder 3 and an end cover 4, the outer cylinder 3 is sleeved outside the inner cylinder 2, a gap is reserved between the outer cylinder 3 and the inner cylinder 2, cushion blocks 7 are welded between the outer cylinder 3 and the inner cylinder 2, cushion blocks 7 are arranged at two axial ends of the steel cylinder 1, a plurality of blind holes 10 for installing magnetic steel are formed in the inner peripheral wall of the inner cylinder 2, a plurality of blind holes 10 for installing the magnetic steel are uniformly distributed in the circumferential direction of the steel cylinder 1, gaps between cover plates at two ends and the outer cylinder 3 and the inner cylinder 2 form a cavity in the steel cylinder 1, limit shaft shoulders 8 are arranged on the end covers 4 at two ends, the limit shaft shoulders 8 are propped against the inner peripheral wall of the inner cylinder 2, the limit shaft shoulders 8 play a flame-proof role, the flame-proof requirement has requirements on the fit gap and the length of the limit shaft shoulders 8, and a sealing ring 9 is only waterproof role, the end cover 4 is fixedly connected with the outer cylinder 3 through screws, and the two ends of the inner cylinder 2 are fixedly connected with each other through the end cover 4.

The conventional outer rotor roller is a single layer, the permanent magnet is embedded and fixed on the inner wall of the conventional outer rotor roller, the outer wall is coated with the rubber, so that the heat dissipation effect of the rotor is not ideal, the rubber coating is not firm, meanwhile, the air gap between the rotor and the stator is influenced by the tension of the belt, the product performance cannot be fully exerted, the communicating part communicated with the cavity is arranged on the end cover 4, the communicating part comprises a plurality of notches 5 arranged on the end cover 4 and uniformly distributed along the circumference of the steel cylinder 1, the notches 5 are corresponding to and communicated with the cavity, except for the notches 5 which can be through holes, a cooling channel 6 is formed between the cavity and the communicating parts on the end covers 4 at two ends of the cavity, the notches 5 at the position are ventilation openings at two ends of the steel cylinder 1 along the axial direction of the steel cylinder, and the ventilation openings at two ends of the steel cylinder 1 are respectively communicated with the cavity to form the cooling channel 6. The steel cylinder 1 adopts a double-forming structure, the inner cylinder and the outer cylinder 3 are heated and deformed and do not affect each other, and the end cover 4 and the steel cylinder 1 are matched to partially avoid the interlayer of the double-layer steel cylinder 1, so that the ventilation of the interlayer and the heat dissipation are facilitated. Here, the cooling passage 6 may be formed by drilling a hole in the outer rotor drum with a drill, or the cooling passage 6 may be formed by attaching an external pipe to the outer rotor drum, or the like.

In order to prevent external water from entering the inside of the product, a sealing ring 9 is arranged between the inner cylinder 2 and the end cover 4.

Example 2

Example 2 is an embodiment of example 1, specifically: as shown in fig. 5, an external rotor motor comprises a stator assembly, wherein an external rotor roller as described above is rotatably mounted on the outer circumferential surface of the stator assembly;

the main shaft of the stator assembly is connected with the end covers 4 at the two ends of the steel cylinder 1 in a mutually rotating way through bearings, and due to the requirements of the air tightness and the explosion isolation performance inside the product, lip rings are arranged between the end covers 4 at the two ends and the main shaft to seal, meanwhile, the limiting shaft shoulders 8 are combined to be propped against the inner peripheral wall of the inner cylinder 2, and the sealing rings 9 between the end covers 4 and the inner cylinder 2 ensure the tightness between the steel cylinder 1 and the stator assembly, and the stator coil and the stator cylinder of the stator assembly are sealed in the outer rotor cylinder.

When the outer rotor roller and the outer rotor motor thereof are used, the steel cylinder 1 adopts a double-layer structure, the inner cylinder 2 is embedded with magnetic steel through the blind hole 10 of the inner wall, the outer wall of the outer cylinder 3 is encapsulated, a gap of 5-10 mm is reserved between the inner cylinder 3 and the outer cylinder 3, the end cover 4 and the steel cylinder 1 are fixedly arranged to face the double-layer steel cylinder 1 to keep away from the air, interlayer air circulation is facilitated, heat dissipation is facilitated, the heat exchange efficiency of the steel cylinder 1 with the air communication of the double-layer structure is improved, the air tightness and explosion-proof performance of the inside of a product are not influenced, the temperature of the inner cylinder 2 has less influence on the outer cylinder 3, the outer wall of the inner cylinder 2 is in contact with the air, heat exchange can be well conducted, the demagnetizing risk of the magnetic steel is reduced, the product is scrapped or the performance is reduced, the product performance can be fully exerted, the stress deformation of the outer cylinder 3 can not influence the outer rotor of the inner layer steel cylinder 1, and the air gap between the stator and the rotor is ensured, and the product operation is more stable.

The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (8)

1. An outer rotor roller, includes steel cylinder (1), its characterized in that: a cooling channel (6) penetrating through two ends is arranged on the steel cylinder (1) along the axial direction of the steel cylinder;

the steel cylinder (1) comprises an inner cylinder (2), an outer cylinder (3) and an end cover (4), wherein the outer cylinder (3) is sleeved outside the inner cylinder (2), a gap is reserved between the outer cylinder (3) and the inner cylinder (2), two ends of the outer cylinder (3) and two ends of the inner cylinder (2) are fixedly connected with each other through the end cover (4), a communicating part communicated with a cavity body is arranged on the end cover (4), and a cooling channel (6) is formed between the cavity body and the communicating parts on the end covers (4) at two ends of the cavity body.

2. An outer rotor drum as claimed in claim 1, wherein: the communicating part comprises a notch (5) formed in the end cover (4), and the notch (5) corresponds to and communicates with the cavity.

3. An outer rotor drum as claimed in claim 2, wherein: the notches (5) are distributed uniformly along the circumference of the steel cylinder (1).

4. An outer rotor drum as claimed in claim 1, wherein: a cushion block (7) is fixedly connected between the outer cylinder (3) and the inner cylinder (2).

5. An outer rotor drum as claimed in claim 4, wherein: the end cover (4) is provided with a limiting shaft shoulder (8), the limiting shaft shoulder (8) is propped against the inner peripheral wall of the inner cylinder (2), and the end cover (4) is fixedly connected with the outer cylinder (3) through screws.

6. An outer rotor drum as claimed in claim 1, wherein: a sealing ring (9) is arranged between the inner cylinder (2) and the end cover (4).

7. An outer rotor drum as claimed in claim 1, wherein: the inner peripheral wall of the inner cylinder (2) is provided with a plurality of blind holes (10) for installing magnetic steel.

8. An external rotor motor, characterized in that: comprising a stator assembly having rotatably mounted on its outer circumferential surface an outer rotor drum according to any one of claims 1-7.