CN219779944U - Brushless motor with compact structure - Google Patents

Abstract

The utility model discloses a brushless motor with a compact structure, which is used for providing mechanical power for a crank-link mechanism of air compression equipment and comprises a main shell, a rear end cover and a control device for controlling the motion state of the brushless motor, wherein the control device is arranged in the rear end cover, one end part of the rear end cover is assembled with one end part of the main shell in a matched manner, and the symmetrical central lines of the rear end cover and the main shell are approximately overlapped with each other in the assembly direction.

Description

Brushless motor with compact structure

Technical Field

The utility model relates to the technical field of brushless motors, in particular to a brushless motor with a compact structure.

Background

The brushless motor is composed of a motor main body and a driver (control device), and is a typical electromechanical integrated product. The existing brushless motor body and rear end cover are unreasonably distributed in the assembly direction; and the control device for controlling the motion state of the brushless motor is arranged outside the brushless motor, so that the whole brushless motor occupies a large space, the structure is not compact, and the development trend of miniaturization cannot be adapted.

Disclosure of Invention

The utility model designs a brushless motor with a compact structure, which is used for providing mechanical power for a crank-link mechanism of air compression equipment, and has the advantages of compact structure and small occupied space.

The specific technical scheme is as follows: the utility model provides a compact structure's brushless motor for provide mechanical power for air compression equipment, including main casing, rear end cover and be used for controlling brushless motor motion state's controlling means, controlling means disposes in the rear end cover, rear end cover one end with main casing one end cooperation assembly together, wherein, the respective symmetry central line of rear end cover and main casing is close the coincidence about the assembly direction.

According to a further technical scheme, the control device comprises a printed circuit board and a power electronic device.

Further, the brushless motor includes an inner rotor type motor having an inner rotor shaft.

According to a further technical scheme, the axis of the inner rotor shaft is approximately coincident with the symmetrical center line of the rear end cover and the main shell.

According to a further technical scheme, one end of the rear end cover is detachably assembled with one end of the main shell.

According to a further technical scheme, the inner wall surface of one end part of the rear end cover is matched to the outer wall surface of one end part of the main shell, and a groove for placing a sealing rubber strip is formed in the outer wall surface of one end part of the main shell in a ring mode.

In a further aspect, the other end portion corresponding to the one end portion of the main casing is disposed on the air compression device.

According to a further technical scheme, the main shell is manufactured in an integrated mode.

According to a further technical scheme, the rear end cover is manufactured in an integrated mode.

The beneficial effects are that:

by applying the technical scheme of the utility model, the brushless motor with a compact structure has small occupied space and compact structure.

Description of the drawings:

the accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In the drawings:

FIG. 1 is a schematic view of the internal structure of a brushless motor according to an embodiment of the utility model;

FIG. 2 is a schematic view of the brushless motor assembly of FIG. 1;

fig. 3 is a schematic diagram of the groove structure of the main housing of fig. 1.

In the figure: the brushless motor comprises a brushless motor 1, an inner rotor shaft 1-1, a main housing 1-2, a groove 1-3, a rear end cover 1-4-1, an inner wall surface 1-4-2, a control device 1-5, a main housing 1-7, a main housing 1-8, and a central line A.

Specific examples:

the technical solutions of the embodiments of the present utility model will be clearly and completely described with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, according to an embodiment of the present utility model, a compact brushless motor is provided, preferably for providing mechanical power to and operating a crank link of an air compression device. Existing motors for providing mechanical power to air compression devices typically employ brushed motors, whose carbon brushes are prone to damage. The brushless motor 1 of the present embodiment is preferably applied to a crank link of an air compression device to provide mechanical power, and has an extended service life and is not easily damaged. It should be noted that the brushless motor 1 of the present utility model includes, but is not limited to, application to only air compression devices, and any brushless motor 1 to which the present embodiment can be applied may be used. The brushless motor control device comprises a main shell 1-2, a rear end cover 1-4 and a control device 1-5 for controlling the motion state of the brushless motor, wherein the control device 1-5 for controlling the motion state of the brushless motor comprises, but is not limited to, the following functions of adjusting the rotation speed and the steering of the brushless motor, controlling the start and stop of the brushless motor and the like. The control device 1-5 is configured in the rear end cover 1-4, and one end part of the rear end cover 1-4 is matched and assembled with one end part 1-8 of the main shell, wherein the symmetrical center lines A of the rear end cover 1-4 and the main shell 1-2 are approximately coincident with each other in the assembly direction (the direction shown by the arrow in fig. 1). In the above scheme, unlike the conventional control device 1-5 configured outside the brushless motor 1, in this scheme, the control device 1-5 is configured inside the rear end cover 1-4, and one end portion 1-4-1 of the rear end cover is assembled with one end portion 1-8 of the main housing in a matching manner, so that the brushless motor is highly integrated, the occupied space of the brushless motor is saved, the occupied space can be made smaller, and the symmetrical center lines a of the rear end cover 1-4 and the main housing 1-2 are approximately overlapped with each other in the assembly direction (the direction shown by the arrow in fig. 1), so that the whole brushless motor 1 is more symmetrical and attractive, and the compactness is better. In the case where the fitting error is controlled, the respective center lines a of symmetry of the rear end caps 1-4 and the main housing 1-2 may be completely coincident with respect to the fitting direction (the direction indicated by the arrow in fig. 1).

In this embodiment, the control device 1-5 comprises a printed circuit board and power electronics. The printed circuit board and the power electronic device are manufactured by adopting an electronic surface mounting technology and are highly integrated. The small-size requirement of the brushless motor 1 is more adapted, and the internal space is saved.

In this embodiment, the brushless motor 1 includes an inner rotor type motor having an inner rotor shaft 1-1, and is more stable in operation. The inner rotor shaft 1-1 of the inner rotor may be configured to a crank-link mechanism (not shown) of an air compression device (not shown) for providing mechanical power to the crank-link mechanism.

Based on the fact that the rear end cover one end part 1-4-1 is matched and assembled with the main shell one end part 1-8, the symmetrical center lines A (the directions shown by arrows in the figure 1) of the rear end cover 1-4 and the main shell 1-2 are approximately coincident with each other in the assembling direction; the axis of the inner rotor shaft 1-1 is nearly coincident with the center line A of the rear end cover 1-4 and the main housing 1-2, so that the whole brushless motor 1 is more compact and better in assemblability both from the appearance and in the actual structural assembly. In case the assembly error is controlled, the axis of the inner rotor shaft 1-1 and the center line a of the rear end cap 1-4 and the main housing 1-2 may be completely coincident with respect to the assembly direction (the direction indicated by the arrow in fig. 1).

In this embodiment, the rear end cap 1-4-1 is detachably assembled with the main housing 1-8. The assemblability is better, and the subsequent assembly or maintenance of the brushless motor 1 is convenient.

Further, referring to fig. 1, 2 and 3, the inner wall surface 1-4-2 of the one end portion of the rear end cap 1-4 is fitted to the outer wall surface of the one end portion 1-8 of the main housing, wherein a groove 1-3 for placing a sealing rubber strip (not shown) is formed on the outer wall surface of the one end portion 1-8 of the main housing. So that the main housing 1-2 and the rear end cap 1-4 are assembled more tightly together, and the tightness is also better.

The brushless motor 1 in the present embodiment is preferably applied to an air compression device to which the other end portions 1-7 corresponding to the one end portions 1-8 of the main casing are attached (not shown). When the present embodiment is preferably applied to an air compression apparatus, the other end portion 1-7 of the main casing is fitted into an air compression apparatus (not shown), and the mounting position of the other end portion 1-7 can be changed adaptively when applied to other apparatuses or used alone.

In this embodiment, the main housing 1-2 is manufactured by integrally molding. For enhancing its structural strength.

In this embodiment, the rear end caps 1-4 are integrally formed. For enhancing its structural strength.

It should be noted that the foregoing description of the preferred embodiments is merely illustrative of the technical concept and features of the present utility model, and is not intended to limit the scope of the utility model, as long as the scope of the utility model is defined by the claims and their equivalents. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (9)

1. The utility model provides a compact structure's brushless motor for provide mechanical power for air compression equipment's crank link mechanism, its characterized in that includes main casing (1-2), rear end cover (1-4) and is used for controlling brushless motor motion state's controlling means (1-5), controlling means (1-5) dispose in rear end cover (1-4), rear end cover one end (1-4-1) and main casing one end (1-8) cooperation assembly together, wherein, the respective symmetry central line (A) of rear end cover (1-4) and main casing (1-2) is close the coincidence about the assembly direction.

2. A compact brushless electric machine as claimed in claim 1, characterized in that the control means (1-5) comprise a printed circuit board and power electronics.

3. A compact brushless electric machine as claimed in claim 1, characterized in that the brushless electric machine (1) comprises an inner rotor type motor with an inner rotor shaft (1-1).

4. A compact brushless electric machine as claimed in claim 3, characterized in that the axis of the inner rotor shaft (1-1) is approximately coincident with the centre line of symmetry (a) of the rear end cap (1-4) and the main housing (1-2).

5. A compact brushless electric machine as claimed in claim 1, characterized in that said rear end cap has an end portion (1-4-1) detachably fitted to said main housing has an end portion (1-8).

6. A compact brushless motor as claimed in claim 5, wherein an inner wall surface (1-4-2) of the one end portion (1-4-1) of the rear end cap is fitted to an outer wall surface of the one end portion (1-8) of the main casing, and wherein a groove (1-3) for placing a sealing rubber strip is provided in a ring on the outer wall surface of the one end portion (1-8) of the main casing.

7. A compact brushless electric machine as claimed in claim 1, characterized in that the other end (1-7) of the main housing, which corresponds to the one end (1-8) of the main housing, is arranged to an air compression device.

8. A compact brushless electric machine as claimed in claim 1, characterized in that the main housing (1-2) is manufactured in one piece.

9. A compact brushless electric machine as claimed in claim 1, characterized in that the rear end caps (1-4) are manufactured in one piece.