CN111245115A - Brushless motor for spraying machine - Google Patents

Abstract

The invention relates to a brushless motor for a spraying machine, which comprises a shell, a motor shaft and a stator assembly, wherein the motor shaft and the stator assembly are arranged in the shell; a rotor is fixedly arranged on a motor shaft; the stator assembly is coaxially arranged with the rotor and sleeved outside the rotor; the stator assembly comprises a stator iron core fastened on the inner wall of the shell and a stator insulating layer sleeved in the stator iron core; a shaft hole is formed in the stator insulating layer, and the rotor is located in the shaft hole; the brushless motor has the advantages of simple and compact structure and convenience in installation; the stator assembly comprises a stator core fastened on the inner wall of the shell and a stator insulating layer sleeved in the stator core, and has the advantage of convenience in installation; compared with the traditional brushless motor, the structure of the invention can greatly reduce the length of the end part of the stator winding, thereby reducing copper loss and being beneficial to improving efficiency.

Description

A brushless motor for spraying machine

technical field

The invention belongs to the technical field of motor equipment, and in particular relates to a brushless motor for spraying machines.

Background technique

A brushless DC motor is a drive motor that can convert voltage signals into torque and speed to drive the controlled object. The speed of the motor rotor of the brushless DC motor is controlled by the controller and can respond quickly. In the automatic control system, it is used as an executive element, and has the characteristics of small motor time constant, high linearity, and small starting voltage.

The motors of the existing spraying machines are driven by large motors, which take up space and are unstable in operation, and the controllability of the motors is poor.

In view of the above problems, it is necessary to improve it.

SUMMARY OF THE INVENTION

The present invention is to overcome the above-mentioned defects in the prior art, and provides a brushless DC motor for spraying machines, which has a simple structure, small volume, reduces the volume and mass of the motor, and improves the torque density of the motor.

In order to achieve the above purpose, the technical scheme adopted in the present invention is: a brushless motor for spraying machine, comprising a casing, a motor shaft and a stator assembly arranged inside the casing; a rotor is fastened on the motor shaft; a stator The assembly is coaxially arranged with the rotor, and the stator assembly is sleeved on the outside of the rotor; the stator assembly includes a stator iron core fastened on the inner wall of the casing, and a stator insulation layer sleeved in the stator iron core; the stator insulation A shaft hole is formed on the layer, and the rotor is located in the shaft hole.

As a preferred solution of the present invention, the outer stator includes a main annular cylinder formed with the shaft hole, and a plurality of circular cylinders are distributed at equal intervals on the inner circumferential wall of the main annular cylinder along the direction of its generatrix. A long strip-shaped main T-shaped block is provided for winding the coil; correspondingly, a long strip-shaped positioning groove is formed on the inner stator device that is adapted to the long strip-shaped main T-shaped block, and the long strip-shaped main T-shaped block is formed. The moulding block is assembled in the elongated positioning groove.

As a preferred solution of the present invention, a plurality of elongated main T-shaped blocks are arranged at equal intervals, and a coil slot is formed between adjacent elongated main T-shaped blocks.

As a preferred solution of the present invention, a left positioning plate and a right positioning plate are formed on both sides of the long positioning groove; the left positioning plate and the right positioning plate are consistent with the inner wall plate structure of the long main T-block. .

As a preferred solution of the present invention, the stator insulating layer includes left stator slot insulation and right stator slot insulation.

As a preferred solution of the present invention, a left positioning ring and a right positioning ring are formed on the outer sides of the left stator slot insulation and the right stator slot insulation respectively; the left stator slot insulation and the right stator slot insulation are sleeved in the stator iron core, and the left stator slot insulation The positioning ring and the right positioning ring are used to fasten the insulation of the left stator slot and the insulation of the right stator slot on the stator iron core.

As a preferred solution of the present invention, the rotor includes a cylindrical silicon steel piece fastened on the motor shaft, and a bar-shaped magnetic steel fastened in a square groove of the silicon steel piece, wherein the bar-shaped magnetic steel Fastened on the silicon steel.

As a preferred solution of the present invention, the casing includes a cylindrical installation cylinder with openings at both ends, and a circular front end cover coaxially provided at one end opening of the installation cylinder is detachably connected and matched with it. A circular rear end cap is coaxially arranged at the opening at the other end.

As a preferred solution of the present invention, the rear end cover is fixedly connected to the casing and is integrally formed, and a plurality of ventilation slots are formed on the rear end cover; the motor shaft is rotatably connected to the middle of the rear end cover.

As a preferred solution of the present invention, the front end of the motor shaft is sleeved with a fan blade, the fan blade is driven to rotate by the motor shaft, and the fan blade is assembled between the circular front end cover and the casing.

The beneficial effects of the present invention are:

1. The brushless motor of the present invention has the advantages of simple and compact structure and convenient installation; the stator assembly includes a stator iron core fastened on the inner wall of the casing, and a stator insulation layer sleeved in the stator iron core, which has the advantages of convenient installation. Advantages: Compared with the traditional brushless motor, the structure of the present invention can greatly reduce the length of the end of the stator winding, thereby reducing the copper loss, which is beneficial to the improvement of efficiency;

2. The stator insulation layer of the present invention includes left stator slot insulation and right stator slot insulation; the structure design is ingenious, the principle is simple, the production cost is low, the maintenance is convenient, the stator insulation layer is sleeved on the stator iron core, and the armature winding of the stator is Loading the control voltage can change the magnetic flux between the magnetic field generated by the armature winding and the magnetic field generated by the permanent magnet, thereby changing the torque of the rotor part and increasing the speed of the motor, which can reach 10000-30000rpm;

3. Since the winding coils of the present invention are independent and have a slot spacing, the machine can be automatically offline during the manufacturing process, thus simplifying the manufacturing process and saving costs;

4. The mutual inductance of the present invention is very small because there is no coupling between each group of wire groups, so that each phase can be independently controlled and the controllability of the motor is improved;

5. The stator assembly of the present invention includes a stator core fastened on the inner wall of the casing, a stator insulation layer sleeved in the stator core, and has two concentric stator structures, inner and outer, with a cup-shaped rotor in the middle. , the bar-shaped magnetic steel is fastened on the silicon steel part; therefore, this structure can fully reduce the height of the rotor yoke, thereby reducing the volume and mass of the motor, and improving the torque density of the motor;

6. The multi-pole structure is adopted, which can significantly reduce the height of the stator yoke, thereby reducing the volume of the motor and the amount of iron cores, and further improving the torque density. The multi-pole structure of the motor also significantly reduces the length of the stator end and reduces the amount of copper in the stator. Loss and heat generation, improve efficiency.

Description of drawings

1 is a schematic structural diagram of an embodiment of the present invention;

2 is a schematic structural diagram of a casing according to an embodiment of the present invention;

3 is a front view of an embodiment of the present invention;

4 is an A-A cross-sectional view of an embodiment of the present invention;

5 is a side view of an embodiment of the present invention;

6 is a B-B cross-sectional view of an embodiment of the present invention;

7 is an exploded view of an embodiment of the present invention;

Reference symbols in the figure: casing 1, motor shaft 2, rotor 3, stator assembly 4, long strip-shaped main T-block 5, long strip-shaped positioning groove 6, left positioning plate 7, right positioning plate 8, fan blade 9 , silicon steel piece 31, bar magnet 32, stator insulation layer 40, stator core 41, mounting cylinder 101, front end cover 102, rear end cover 103, ventilation slot 104, left stator slot insulation 401, right stator slot insulation 402 , the left positioning circle 403, the right positioning circle 404.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example:

As shown in Figures 1-7, a brushless motor for a spraying machine provided in this embodiment includes a casing 1, a motor shaft 2 and a stator assembly 4 arranged inside the casing 1; the motor shaft 2 is fastened on the There is a rotor 3; the stator assembly 4 is arranged coaxially with the rotor 3 and the stator assembly 4 is sleeved on the outside of the rotor 3; the stator assembly 4 includes a stator iron core 41 fastened on the inner wall of the casing 1, sleeved on the stator The stator insulating layer 40 in the iron core 41; the stator insulating layer 40 is formed with a shaft hole, and the rotor 3 is located in the shaft hole; the brushless motor of the present invention has the advantages of simple and compact structure and convenient installation; the stator The assembly includes a stator iron core fastened on the inner wall of the casing, and a stator insulation layer sleeved in the stator iron core, which has the advantages of convenient installation; compared with the traditional brushless motor, the structure of the present invention can greatly reduce the number of The length of the end of the stator winding, thereby reducing the copper loss, is conducive to the improvement of efficiency.

The stator core 41 includes a main circular cylinder formed with the shaft hole, and a plurality of long strips arranged along its busbar direction for winding coils are distributed at equal intervals on the inner circumferential wall of the main circular cylinder. Correspondingly, the stator insulating layer 40 is formed with a long positioning groove 6 which is adapted to the long main T-block 5, and the long main T-block 5 is assembled in the In the elongated positioning slot 6; a plurality of elongated main T-shaped blocks 5 are arranged at equal distances, and a coil slot is formed between adjacent elongated main T-shaped blocks 5; because the winding coils of the present invention are independent, There is a slot spacing, which enables the machine to automatically roll off the line during the manufacturing process, thus simplifying the manufacturing process and saving costs.

The stator insulation layer 40 includes left stator slot insulation 401 and right stator slot insulation 402; the stator insulation layer of the present invention includes left stator slot insulation and right stator slot insulation; the structure design is ingenious, the principle is simple, the production cost is low, the maintenance is convenient, and the stator The insulating layer is sleeved on the stator iron core, and the control voltage is loaded on the armature winding of the stator, which can change the magnetic flux between the magnetic field generated by the armature winding and the magnetic field generated by the permanent magnet, thereby changing the torque of the rotor part and improving the motor's performance. Speed, up to 10000-30000rpm.

Specifically, a left positioning plate 7 and a right positioning plate 8 are formed on both sides of the elongated positioning groove 6; the left positioning plate 7 and the right positioning plate 8 are consistent with the inner wall plate structure of the elongated main T-block 5; so that The structure in which the stator insulating layer 40 is sleeved on the stator iron core 41 is more compact, and the left stator slot insulation 401 and the right stator slot insulation 402 are respectively formed with a left positioning ring 403 and a right positioning ring 404 outside; the left stator slot insulation 401 and the right stator The slot insulation 402 is sleeved in the stator core 41, and the left positioning ring 403 and the right positioning ring 404 are used to fasten the left stator slot insulation 401 and the right stator slot insulation 402 on the stator core 41; There is no coupling between them, and the mutual inductance is very small, so that each phase can be independently controlled and the controllability of the motor is improved.

The rotor 3 includes a cylindrical silicon steel piece 31 fastened on the motor shaft 2, and a bar-shaped magnetic steel 32 fastened in the square groove of the silicon steel piece 31, wherein the bar-shaped magnetic steel is fastened on the On the silicon steel piece 31; in this solution, the silicon steel piece 31 is formed by stacking a number of silicon steel sheets, and the round end surface of the silicon steel piece 31 is formed with a plurality of square grooves distributed along the axial direction, and the square grooves are used for installation Bar magnet.

The casing 1 includes an installation cylinder 101 which is cylindrical and arranged with openings at both ends. One end of the installation cylinder 101 is coaxially provided with a circular front end cover 102 that is detachably connected with it, and the other end is coaxially arranged at the opening. There is a circular rear end cover 103; wherein, a bearing hole for accommodating a bearing is formed on the rear end cover 103, a bearing is arranged between the bearing and the end of the bearing hole, and the bearing has an adjustment shaft A spacer is also arranged between the bearing and the end of the bearing hole for the effect of the clearance.

The rear end cover 103 is fixedly connected with the casing 1 and is integrally formed, which improves the structural strength and overall firmness of the entire casing 1 and further ensures the safety in use; a number of ventilation slots 104 are formed on the rear end cover 103; the motor shaft 2 rotates Connected to the middle of the rear end cover 103; improves the overall heat dissipation performance of the brushless motor.

The front end of the motor shaft 2 is sleeved with a fan blade 9 , the fan blade 9 is driven to rotate by the motor shaft 2 , and the fan blade 9 is assembled between the circular front end cover 102 and the casing 1 .

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; thus , the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numbers in the figure are used more in this article: casing 1, motor shaft 2, rotor 3, stator assembly 4, long strip main T-block 5, long strip positioning groove 6, left positioning plate 7, right Positioning plate 8, fan blade 9, silicon steel piece 31, bar magnet 32, stator insulating layer 40, stator iron core 41, mounting cylinder 101, front end cover 102, rear end cover 103, ventilation slot 104, left stator slot insulation 401, right stator slot insulation 402, left positioning ring 403, right positioning ring 404 and other terms, but do not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims (10)

1. A brushless motor for a spray coater, comprising: comprises a machine shell (1), a motor shaft (2) and a stator component (4) which are arranged in the machine shell (1); a rotor (3) is fastened on the motor shaft (2); the stator assembly (4) is coaxially arranged with the rotor (3), and the stator assembly (4) is sleeved outside the rotor (3); the stator assembly (4) comprises a stator core (41) fastened on the inner wall of the shell (1) and a stator insulating layer (40) sleeved in the stator core (41); a shaft hole is formed in the stator insulating layer (40), and the rotor (3) is located in the shaft hole.

2. A brushless motor for a spray applicator as defined in claim 1, wherein: the stator core (41) comprises a main circular cylinder body formed with a shaft hole, and a plurality of strip-shaped main T-shaped blocks (5) which are arranged along the bus direction and used for winding coils are distributed on the inner circumferential wall surface of the main circular cylinder body at equal intervals; correspondingly, the stator insulating layer (40) is provided with a strip-shaped positioning groove (6) matched with the strip-shaped main T-shaped block (5), and the strip-shaped main T-shaped block (5) is assembled in the strip-shaped positioning groove (6).

3. A brushless motor for a spray applicator as defined in claim 2, wherein: a plurality of strip-shaped main T-shaped blocks (5) are arranged at equal intervals, and a coil groove is formed between every two adjacent strip-shaped main T-shaped blocks (5).

4. A brushless motor for a spray applicator as defined in claim 2, wherein: a left positioning plate (7) and a right positioning plate (8) are formed on two sides of the strip-shaped positioning groove (6); the left positioning plate (7) and the right positioning plate (8) are consistent with the inner wall plate structure of the strip-shaped main T-shaped block (5).

5. A brushless motor for a spray applicator as claimed in claim 4, wherein: the stator insulation layer (40) comprises a left stator slot insulation (401) and a right stator slot insulation (402).

6. A brushless motor for a spray applicator as claimed in claim 5, wherein: a left positioning ring (403) and a right positioning ring (404) are respectively formed on the outer sides of the left stator slot insulator (401) and the right stator slot insulator (402); the left stator slot insulator (401) and the right stator slot insulator (402) are sleeved in the stator core (41), and the left positioning ring (403) and the right positioning ring (404) are used for fastening the left stator slot insulator (401) and the right stator slot insulator (402) on the stator core (41).

7. A brushless motor for a spray applicator as defined in claim 1, wherein: the rotor (3) comprises a cylindrical silicon steel part (31) fastened on the motor shaft (2) and a bar-shaped magnetic steel (32) fastened in a square groove of the silicon steel part (31), wherein the bar-shaped magnetic steel (32) is fastened on the silicon steel part (31).

8. A brushless motor for a spray applicator as defined in claim 1, wherein: the casing (1) comprises a cylindrical mounting cylinder body (101) with openings at two ends, a circular front end cover (102) detachably connected and matched with the mounting cylinder body (101) is coaxially arranged at the opening at one end of the mounting cylinder body (101), and a circular rear end cover (103) is coaxially arranged at the opening at the other end of the mounting cylinder body.

9. A brushless motor for a spray applicator as defined in claim 8, wherein: the rear end cover (103) is fixedly connected with the shell (1) and integrally formed, and a plurality of ventilation grooves (104) are formed in the rear end cover (103); the motor shaft (2) is rotationally connected to the middle part of the rear end cover (103).

10. A brushless motor for a spray applicator as defined in claim 9, wherein: the fan blade (9) is sleeved at the front end of the motor shaft (2), the fan blade (9) is driven by the motor shaft (2) to rotate, and the fan blade (9) is assembled between the circular front end cover (102) and the casing (1).

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