CN213754250U - Semi-open forced air cooling heat dissipation structure of permanent magnet brushless torque motor - Google Patents

Abstract

The utility model provides a permanent magnetism brushless torque motor semi-open forced air cooling heat radiation structure, it includes the fuselage and locates inside rotor, the stator of fuselage, the front end and the rear end of fuselage are provided with first flabellum and second flabellum respectively, are provided with the pivot on the rotor, the both ends of pivot extend the fuselage and with first flabellum, second flabellum coupling, the ventilation structure with the inside intercommunication of fuselage is seted up to the preceding terminal surface and the rear end face of fuselage. The heat dissipation structure can improve the effective heat dissipation capacity of the motor, indirectly improve the torque density and the power density of the motor, and improve the reliability of the motor, and the first fan blade and the second fan blade which drive the heat dissipation are driven by the rotating shaft of the motor, so that additional connection of a driving source is not needed. In addition, first flabellum and second flabellum set up in opposite directions, can realize the inside air blast in opposite directions of motor, prevent the accumulation of the local heat of motor to this heat radiation structure still is applicable to other closed forced air cooling or natural cooling's inner rotor motors and uses.

Description

Semi-open forced air cooling heat dissipation structure of permanent magnet brushless torque motor

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of brushless motor and specifically relates to a permanent magnet brushless torque motor semi-open forced air cooling heat radiation structure is related to.

[ background of the invention ]

With the miniaturization, miniaturization and portability of household electrical appliances, the permanent magnet brushless torque motor in the household electric tool is gradually designed in the direction of compact structure and high density. Under the same working condition, the size of the motor is limited by the heat dissipation structure of the motor to a great extent, and the heat dissipation capacity of the motor is improved, so that the load pressure under the same working condition can be reduced. In household power tools, the power and torque of permanent magnet brushless torque motors are higher than other motor types, but their heat dissipation requires additional design and consideration. In addition, the working environment of the torque motor is usually closed, and the whole motor is also usually sealed, so that heat is difficult to dissipate when the motor works under a heavy load. The continuous accumulation of heat will seriously affect the operational reliability of the motor and the safety of the internal components.

For this reason, further improvements are necessary.

[ Utility model ] content

The utility model aims at overcoming above-mentioned problem, we provide a permanent magnetism brushless torque motor semi-open forced air cooling heat radiation structure, can provide better heat dissipation condition for torque motor, indirectly increase the power density and the torque density of motor, guarantee radiating reliability of motor and high efficiency in compact structure.

In order to achieve the purpose, the semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor comprises a machine body, and a rotor and a stator which are arranged inside the machine body, wherein a first fan blade and a second fan blade are respectively arranged at the front end and the rear end of the machine body, a rotating shaft is arranged on the rotor, the machine body is extended out of the two ends of the rotating shaft and is in shaft connection with the first fan blade and the second fan blade, and a ventilation structure communicated with the inside of the machine body is arranged on the front end face and the rear end face of the machine body.

In one or more embodiments, the body includes a casing, a front cover plate and a rear cover plate, the front cover plate and the rear cover plate are detachably mounted on the front end and the rear end of the casing through connecting members, and the ventilation structure is disposed on the front cover plate and the rear cover plate.

In one or more embodiments, the ventilation structure comprises a plurality of first ventilation holes which are axially and uniformly distributed, and the ventilation structure corresponds to a winding inside the machine body.

In one or more embodiments, the rotating shaft is provided with a limiting structure located at the first fan blade and the second fan blade for preventing the first fan blade and the second fan blade from moving axially.

In one or more embodiments, the limiting structure is a screw, and the first blade, the second blade and the rotating shaft are all provided with screw holes.

In one or more embodiments, the limiting structure is a shaft retaining ring, the rotating shaft is provided with grooves in front of and behind the first fan blade and in front of and behind the second fan blade, and the grooves are provided with the shaft retaining rings.

In one or more embodiments, the rotor is provided with a plurality of second ventilation holes extending in the axial direction, and the plurality of second ventilation holes are uniformly distributed in the circumferential direction.

In one or more embodiments, the air outlet direction of the first fan blade is opposite to the air outlet direction of the second fan blade.

Compared with the background art, the utility model has the following technical effects: the heat dissipation structure can improve the effective heat dissipation capacity of the motor, indirectly improve the torque density and the power density of the motor, and improve the reliability of the motor, and the first fan blade and the second fan blade which drive the heat dissipation are driven by the rotating shaft of the motor, so that additional connection of a driving source is not needed. In addition, first flabellum and second flabellum set up in opposite directions, can realize the inside air blast in opposite directions of motor, prevent the accumulation of the local heat of motor to this heat radiation structure still is applicable to other closed forced air cooling or natural cooling's inner rotor motors and uses.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a permanent magnet brushless torque motor with a forced cold air heat dissipation structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 at another angle;

FIG. 3 is a schematic structural view of the first fan blade, the front cover plate, the rear cover plate, and the second fan blade according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a rotor according to an embodiment of the present invention.

[ detailed description ] embodiments

In order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

Referring to fig. 1-4, the present application provides a semi-open forced air cooling heat dissipation structure for a permanent magnet brushless torque motor, which comprises a body, and a rotor 1 and a stator disposed inside the body, wherein the front end and the rear end of the body are respectively provided with a first fan blade 2 and a second fan blade 3, the rotor 1 is provided with a rotating shaft 4, the rotating shaft 4 is disposed at the axis of the rotor and rotates synchronously with the rotor, two ends of the rotating shaft 4 extend out of the body and are coupled to the first fan blade 2 and the second fan blade 3, the front end surface and the rear end surface of the body are provided with a ventilation structure communicated with the inside of the body, the rotation of the rotating shaft 4 during operation of the motor drives the first fan blade 2 and the second fan blade 3 at two ends to rotate, so that the first fan blade 2 and the second fan blade 3 generate cold air entering the inside of the body to cool and dissipate heat inside the body, thereby improving the reliability and the heat dissipation efficiency of the motor, indirectly increasing the torque density and power density of the motor.

Preferably, the fuselage includes casing 5, front shroud 6 and back shroud 7, and front shroud 6 and back shroud 7 pass through connecting piece demountable installation in the front end and the rear end of casing 5, and is concrete, and the connecting piece is bolt or screw, and corresponding screw hole has all been seted up at front shroud 6, back shroud 7 and the front and back both ends of casing 5, ventilation structure sets up on front shroud 6 and back shroud 7, offers ventilation structure and changes machine-shaping on front shroud 6 and back shroud 7. Specifically, ventilation structure comprises the first ventilation hole 8 of a plurality of axial equipartitions, and first ventilation hole 8 is fan-shaped, ventilation structure corresponds the inside winding of fuselage to the better carries out cooling for inside winding.

Preferably, pivot 4 is located first flabellum 2 and second flabellum 3 department and is provided with the limit structure who prevents first flabellum 2, 3 axial displacement of second flabellum, and is concrete, limit structure is the screw, all opened the screw hole on first flabellum 2, second flabellum 3 and the pivot 4, fix first flabellum 2 and second flabellum 3 in pivot 4 through the screw. The limiting structure can also be a shaft retaining ring, grooves are formed in the front and back of the first fan blade 2 and the front and back of the second fan blade 3 of the rotating shaft 4, and the shaft retaining ring is arranged on the grooves and passes through the shaft retaining ring. The manufacturing enterprise can select corresponding limit structure to use according to actual production demand.

Preferably, a plurality of second ventilation holes 9 extending axially are formed in the rotor 1, the plurality of second ventilation holes 9 are uniformly distributed in the circumferential direction, and the second ventilation holes 9 are also called as fabrication holes, so that cooling is facilitated, and the overall weight of the motor can be reduced.

Preferably, the air outlet direction of the first fan blade 2 is opposite to the air outlet direction of the second fan blade 3, that is, bidirectional air blowing is realized, and accumulation of local heat of the motor is prevented.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all equivalent modifications or changes made by those skilled in the art according to the present invention should be included in the protection scope of the claims.

Claims (8)

1. The utility model provides a permanent magnetism brushless torque motor semi-open forced air cooling heat radiation structure, includes the fuselage and locates inside rotor (1), the stator of fuselage, its characterized in that: the front end and the rear end of fuselage are provided with first flabellum (2) and second flabellum (3) respectively, are provided with pivot (4) on rotor (1), the both ends of pivot (4) extend the fuselage and with first flabellum (2), second flabellum (3) coupling, the ventilation structure with the inside intercommunication of fuselage is seted up to the preceding terminal surface and the rear end face of fuselage.

2. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to claim 1, characterized in that: the fuselage includes casing (5), front shroud (6) and back shroud (7), and front shroud (6) and back shroud (7) pass through connecting piece demountable installation in the front end and the rear end of casing (5), ventilation structure sets up on front shroud (6) and back shroud (7).

3. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to claim 2, characterized in that: the ventilation structure comprises first ventilation hole (8) of a plurality of axial equipartitions, the ventilation structure corresponds the inside winding of fuselage.

4. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to claim 1, characterized in that: the rotating shaft (4) is located at the first fan blade (2) and the second fan blade (3) and is provided with a limiting structure for preventing the first fan blade (2) and the second fan blade (3) from moving axially.

5. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to claim 4, wherein: the limiting structure is a screw, and screw holes are formed in the first fan blade (2), the second fan blade (3) and the rotating shaft (4).

6. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to claim 4, wherein: the limiting structure is a shaft retaining ring, grooves are formed in the front and back of the first fan blade (2) and the front and back of the second fan blade (3) of the rotating shaft (4), and the shaft retaining ring is arranged on the grooves.

7. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to any one of claims 1 to 6, wherein: the rotor (1) is provided with a plurality of axially extending second ventilation holes (9), and the second ventilation holes (9) are uniformly distributed in the circumferential direction.

8. The semi-open forced air cooling heat dissipation structure of the permanent magnet brushless torque motor according to any one of claims 1 to 6, wherein: the air outlet direction of the first fan blade (2) is opposite to the air outlet direction of the second fan blade (3).

Images