CN217741431U - Wire leading-out structure of external rotor motor - Google Patents

Abstract

The utility model belongs to the technical field of the motor technology and specifically relates to an outer rotor electric machine's electric wire draw-out structure, overcome the problem that current outer rotor electric machine electric wire draw-out structure has potential safety hazard and bottom plate intensity not enough, the base has, stator and rotor, the base includes two parts of bottom plate and core section of thick bamboo, the iron core of stator is fixed on the core section of thick bamboo, the iron core clearance cover of rotor is on the iron core of stator, the core section of thick bamboo is stretched into in the pivot of rotor, the electric wire of motor is drawn forth from the coil on the stator, the bottom plate and the core section of thick bamboo of base are the components of a whole that can function independently structure, the bottom plate is the steel sheet formed part, the outer lane of bottom plate has the bellied reinforcing abrupt circle to the rotor direction, the last shaping of corresponding electric wire extraction position department of reinforcing abrupt circle has recessed trough, the bottom plate is close to the shaping of trough has recessed reinforcing muscle, the recessed direction of reinforcing muscle is unanimous with the recessed direction of trough, the shape of reinforcing muscle is half-circular arc, the opening of circular-arc reinforcing muscle is towards the trough.

Description

Wire leading-out structure of external rotor motor

Technical Field

The utility model belongs to the technical field of the motor technology and specifically relates to an outer rotor electric machine's electric wire leading-out structure.

Background

The external rotor motor is a motor selected according to needs, a heat radiation fan on a box body of electronic and electrical equipment can select the external rotor motor for multiple use, and figure 1 shows the structure of the existing external rotor motor, the motor is provided with a base 1', a stator 2' is fixed on the base 1', a rotating shaft and a rotor iron core are fixed to form a rotor 3', the rotor iron core is sleeved on the stator iron core in a clearance way, the base 1' is an aluminum casting and is provided with a base plate 1-1' and a core barrel 1-2' which are integrated, the rotating shaft extends into the core barrel 1-2', one bearing for supporting the rotating shaft is arranged in the core barrel 1-2' and the other bearing is arranged in a cast aluminum end cover of the stator iron core, the stator iron core is fixed outside the core barrel 1-2', a blade disc of the fan is fixed on the rotating shaft, and the fan can be fixed by fixing the motor base 1 '.

The coil of the motor is arranged on a stator 2', the lead-out wire of the coil is led out from a bottom plate 1-1', the bottom surface of the bottom plate 1-1 'is a mounting surface, so the wire can only be led out from the upper surface of the bottom plate 1-1' to an outer ring and fixed on the upper surface of the bottom plate 1-1', the existing structure adopts a fixing mode commonly used for the wire, the wire is pasted on the upper surface of the bottom plate 1-1', an insulating small pressing plate is pressed at the position where the wire needs to be fixed, two bolts penetrate through holes at two ends of the insulating small pressing plate and are screwed on threaded holes of the bottom plate 1-1', in addition, the bottom plate 1-1' is used as a part for fixing the motor and has proper strength and rigidity, particularly, the outer ring where the mounting hole of the bottom plate 1-1 'is located, but the wire needs to be led out from the outer ring, so a notch is also needed to be formed at the outer ring of the bottom plate 1-1', and the structure related to lead out the wire has the defects that: 1. the operation of fixing the electric wire and pressing the small insulating pressing plate is inconvenient due to the small installation space; 2. if the bolt for fixing the wire falls off under the condition of vibration, the bolt can be absorbed by the motor due to magnetism to damage the motor, and if the bolt falls off, the bolt can also cause short circuit danger to electronic components in the box body of the electric appliance; 3. even if the electric wire is not fixed, a fixing bolt is not used, the lead notch on the base plate also influences the strength and the rigidity of the base plate, and the base plate is deformed and the notch is cracked in the process of installing and fixing the motor.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a wire leading-out structure of external rotor electric machine, overcome current wire leading-out structure and have the potential safety hazard and the not enough problem of bottom plate intensity.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an outer rotor electric machine's electric wire draws structure, has base, stator and rotor, the base includes two parts of bottom plate and core section of thick bamboo, and the iron core of stator is fixed on the core section of thick bamboo, and the iron core clearance cover of rotor is on the iron core of stator, and the pivot of rotor stretches into the core section of thick bamboo, the electric wire of motor is drawn forth from the coil on the stator, the bottom plate and the core section of thick bamboo of base are the components of a whole that can function independently structure, the bottom plate is the steel sheet formed part, the outer lane of bottom plate has to the prominent reinforcing of rotor direction circle suddenly, the reinforcing is corresponding electric wire extraction position department shaping on the circle suddenly has recessed trough, and the shaping has recessed reinforcing rib on the plate body that the bottom plate is close to the trough. The concave direction of the reinforcing rib is consistent with the concave direction of the wiring groove, and the reinforcing rib is arranged to compensate for the local insufficient rigidity caused by the wiring groove arranged on the reinforcing convex ring.

Specifically, for better enhancing the strength near the wiring groove, the reinforcing rib is in the shape of a semi-circular arc, and the opening of the circular arc-shaped reinforcing rib faces the wiring groove.

Specifically, the core cylinder is fixed on the bottom plate by bolts, and two bearings for supporting the rotating shaft are arranged in the core cylinder.

Because the stator is fixed on the core barrel, in order to determine the circumferential corner position of the stator and the bottom plate and even to determine the leading-out position of the electric wire on the bottom plate, the end face of the core barrel, which is attached to the bottom plate, is provided with positioning protrusions, the positioning protrusions extend into the positioning holes in the bottom plate, and the positioning protrusions are at least two which are not equally distributed on the circumference.

The utility model has the advantages that: the utility model discloses on setting up external rotor motor base into the components of a whole that can function independently form and using the bottom plate steel sheet formed part, set up the trough on the bottom plate outer lane reinforcing abrupt circle, make the electric wire draw from the trough, the existence of trough can make motor assembler and motor fixers utilize the bending hardness of electric wire to maintain the electric wire in the trough, do not need to use the mounting in addition, has improved the security; the plate body near the wiring groove of the bottom plate is provided with the reinforcing rib, so that the rigidity and the strength of the bottom plate cannot be reduced due to the arrangement of the wiring groove; the core barrel is fixed on the bottom plate in a unique positional relationship by the positioning projections which are not equally divided, so that the lead-out wire of the coil is easily made to correspond to the wiring groove.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of a conventional external rotor motor;

fig. 2 is a cross-sectional view of the present invention showing a split base;

fig. 3 is a schematic structural diagram of the present invention;

FIG. 4 is a schematic view of the base composed of the core barrel and the bottom plate of the present invention;

fig. 5 is a front view of the middle bottom plate of the present invention;

FIG. 6 isbase:Sub>A cross-sectional view A-A of FIG. 5;

FIG. 7 is a partial view from the B direction of FIG. 5;

fig. 8 is a sectional view of the cartridge of the present invention.

In fig. 1: 1', a base, 1-1', a bottom plate, 1-2', a core cylinder, 2', a stator, 3' and a rotor;

in fig. 2: 1. the device comprises a base, 1-1 parts, a bottom plate, 1-1-1 parts, a reinforcing convex ring, 1-1-2 parts, a wiring groove, 1-1-3 parts, a reinforcing rib, 1-2 parts, a core cylinder, 1-2-1 parts and a positioning protrusion;

2. a stator;

3. a rotor;

4. an electrical wire.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and illustrate, by way of illustration only, the basic structure of the invention, and thus only show the components that are relevant to the invention.

Referring to fig. 2 and 3, the wire leading-out structure of an external rotor motor comprises a base 1, a stator 2 and a rotor 3, wherein the base 1 comprises a bottom plate 1-1 and a core barrel 1-2, an iron core of the stator 2 is fixed on the core barrel 1-2, an iron core gap of the rotor 3 is sleeved on the iron core of the stator 2, a rotating shaft of the rotor 3 extends into the core barrel 1-2, a wire 4 of the motor is led out from a coil on the stator 2, the bottom plate 1-1 and the core barrel 1-2 of the base 1 are of a split structure, the bottom plate 1-1 is a steel plate formed part, the steel plate formed part is a part obtained by stamping and stretching and forming a steel plate through a die, the form of the bottom plate is shown in fig. 4, 5, 6 and 7, an outer ring of the bottom plate 1-1 is provided with a reinforcing convex ring 1-1-1 protruding towards the rotor 3, a concave wiring groove 1-1-2 is formed on the reinforcing convex ring 1-1-1 corresponding to the leading-out position of the electric wire 4, a reinforcing rib 1-1-3 is formed on a plate body of a bottom plate 1-1 close to the wiring groove 1-1-2, the reinforcing rib 1-1-3 is in a semi-circular arc shape, the opening of the circular arc reinforcing rib 1-1-3 faces the wiring groove 1-1-2, a core cylinder 1-2 is fixed on the bottom plate 1-1 by bolts, two bearings for supporting a rotating shaft are arranged in the core cylinder 1-2, figure 8 shows the structure of the core cylinder 1-2, a positioning protrusion 1-2-1 is arranged on the end surface of the core cylinder 1-2, which is attached to the bottom plate 1-1, the positioning protrusion 1-2-1 extends into a positioning hole on the bottom plate 1-1, the positioning protrusions 1-2-1 are two which are not distributed equally on the circumference. The concave shape of the wiring grooves 1-1-2 can be an arc shape as shown in FIG. 7 or a rectangle shape; the concave shape of the reinforcing ribs 1-1-3 can be an arc shape as shown in fig. 6, and can also be a rectangle or a triangle.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (4)

1. The utility model provides an electric wire of external rotor electric machine draws forth structure, has base (1), stator (2) and rotor (3), base (1) includes two parts of bottom plate (1-1) and core section of thick bamboo (1-2), and the iron core of stator (2) is fixed on core section of thick bamboo (1-2), and the iron core clearance cover of rotor (3) is on the iron core of stator (2), and the pivot of rotor (3) stretches into core section of thick bamboo (1-2), and electric wire (4) of motor are drawn forth from the coil on stator (2), characterized by: the base plate (1-1) and the core barrel (1-2) of the base (1) are of a split structure, the base plate (1-1) is a steel plate forming piece, the outer ring of the base plate (1-1) is provided with a reinforcing convex ring (1-1-1) protruding towards the rotor (3), a concave wiring groove (1-1-2) is formed in the position, corresponding to the leading-out position of the electric wire (4), of the reinforcing convex ring (1-1-1), and a concave reinforcing rib (1-1-3) is formed on the plate body, close to the wiring groove (1-1-2), of the base plate (1-1).

2. The wire leading-out structure of the external rotor motor according to claim 1, wherein: the reinforcing ribs (1-1-3) are in the shape of a semicircular arc, and the openings of the circular arc reinforcing ribs (1-1-3) face the wiring grooves (1-1-2).

3. The wire leading-out structure of the external rotor motor according to claim 1, wherein: the core cylinder (1-2) is fixed on the bottom plate (1-1) by bolts, and two bearings for supporting the rotating shaft are arranged in the core cylinder (1-2).

4. The wire leading-out structure of the external rotor motor according to claim 1, wherein: positioning protrusions (1-2-1) are arranged on the end face, attached to the bottom plate (1-1), of the core barrel (1-2), the positioning protrusions (1-2-1) extend into the positioning holes in the bottom plate (1-1), and the number of the positioning protrusions (1-2-1) is at least two, wherein the positioning protrusions are distributed in a circumferentially unequal manner.

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