Brushless motor for air compressor

Abstract

The invention discloses a brushless motor for an air compressor, which comprises a stator, a rotor and a motor main shell for accommodating, and also comprises a motor rear end cover and a circuit board integrated with a master device capable of controlling the starting, speed regulation, braking and reversing of the brushless motor, and the circuit board is provided with a first surface and a second surface which are oppositely arranged; the motor rear end cover comprises an inner end face facing the interior of the brushless motor and an outer end face arranged opposite to the inner end face, the motor rear end cover and the motor main shell are detachably installed, the first face is arranged on the inner end face, and the first face and the inner end face are almost completely attached.

Description

Technical Field

[0001] The invention relates to the technical field of brushless motors, and in particular to a brushless motor for an air compressor. Background Art

[0002] Air compressors (air supply equipment) are used in all types of vehicles, especially to supply compressed air to the air springs of cars. The motor mechanism is an important component of the air compression mechanism, which is used to drive the piston and connecting rod of the air compression unit to reciprocate; when a brushless motor is selected as the motor mechanism, the brushless motor has a circuit board (PCB) integrated with a master device that can control the start, speed regulation, braking and reverse of the brushless motor. The circuit board (PCB) integrates several electronic components. When these components are working, they will generate heat, and the brushless motor rotor will work or other components that can generate heat. If the heat concentrated on the circuit board (PCB) is not dissipated in time, it will accelerate the aging of the circuit board components, and even cause the operation failure of the brushless motor, as well as other unknown damages. Summary of the invention

[0003] The present invention designs a brushless motor for an air compressor, and can effectively conduct heat of the circuit board by reasonably arranging the position of the circuit board inside the brushless motor.

[0004] The specific technical scheme is as follows: A brushless motor for an air compressor, comprising: a stator, a rotor and a main motor housing for accommodating the motor, and also comprising a rear end cover of the motor and a circuit board integrated with a main command device capable of controlling the start, speed regulation, braking and reverse of the brushless motor, wherein the circuit board comprises a first surface and a second surface arranged opposite to each other; the rear end cover of the motor comprises an inner end surface facing the inside of the brushless motor and an outer end surface arranged opposite to the inner end surface, the rear end cover of the motor is detachably mounted on the main motor housing, the first surface is arranged on the inner end surface, wherein the first surface is almost completely fitted with the inner end surface.

[0005] According to a further technical solution, the first surface is close to a light surface; and electronic components are arranged on the second surface.

[0006] According to a further technical solution, a plurality of heat dissipation fins are arranged on the outer end surface opposite to the inner end surface.

[0007] According to a further technical solution, a locking position for fixing the circuit board is formed on the inner end surface, wherein the locking position is configured as a bolt hole which is recessed relative to the inner end surface.

[0008] A further technical solution is that a connecting ear is formed on the circumference of the rear end cover of the motor near the outer end surface, which is used to connect bolts when fixing the rear end cover of the motor, wherein the connecting ear portion extends out of the rear end cover of the motor; a hole portion for inserting a wiring harness is also opened on the circumference of the rear end cover of the motor, and the wiring harness is electrically connected to the circuit board.

[0009] According to a further technical solution, a part of the pipeline is formed on the outer end surface, and another part of the pipeline is formed on the inner end surface and passes through the circuit board; the pipeline is used to allow air to pass through.

[0010] A further technical solution is to form a stopper on the axial outer wall of the pipe at the inner end surface, so as to limit the assembly position of the circuit board when the circuit board is assembled to the stopper position.

[0011] According to a further technical solution, the stopper is constructed as a convex rib with a length, the length direction of which is consistent with the axial direction of the pipeline, and the circuit board is formed with a recessed portion corresponding to the convex rib.

[0012] According to a further technical solution, the material used to manufacture the rear end cover of the motor includes aluminum.

[0013] According to a further technical solution, the rear end cover of the motor is manufactured in one piece.

[0014] Beneficial effects:

[0015] According to the technical solution of the present invention, a brushless motor for an air compressor includes: a stator, a rotor, and a main housing for housing the motor, and also includes a motor rear end cover and a circuit board integrated with a main command device capable of controlling the start, speed regulation, braking, and reverse of the brushless motor, wherein the circuit board is composed of a first surface and a second surface arranged relatively; the motor rear end cover includes an inner end face facing the inside of the brushless motor and an outer end face arranged relatively to the inner end face; the motor rear end cover is detachably mounted on the motor main housing, and the first surface is arranged on the inner end face, wherein the first surface is almost completely fitted with the inner end face. The first surface of the circuit board is almost completely fitted with the inner end face of the motor rear end cover, which improves the heat conduction efficiency between the circuit board and the motor rear end cover, and facilitates the circuit board to conduct heat out through the motor rear end cover, thereby reducing the internal temperature of the circuit board and improving the service life of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] In the attached picture:

[0018] Figure 1 Schematic diagram of the internal structure of the brushless motor according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Axonometric view of the rear end cover of the motor;

[0020] Figure 3 This is an assembly diagram of the rear end cover and circuit board of the motor according to an embodiment of the present invention;

[0021] Figure 4 yes Figure 2 Schematic diagram of the inner end face of the rear end cover of the motor;

[0022] Figure 5 yes Figure 2 Schematic diagram of the outer end face of the rear end cover of the motor.

[0023] In the figure: 1 circuit board, 1-1 first surface, 1-2 second surface, 1-3 recess, 4 motor rear end cover, 4-1 pipeline, 4-1-1 rib, 4-2 bolt hole, 4-3 inner end surface, 4-4 heat sink fin, 4-5 hole, 4-6 connecting ear, 4-7 recess, 4-8 outer end surface, 4-9 stopper, S pipeline axial direction, Z circumferential direction, 5 motor main housing, 6 brushless motor interior, 10 bolts. Specific embodiments

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] According to an embodiment of the present invention, a brushless motor for an air compressor is provided. Figure 1 , including: a stator (not shown), a rotor (not shown) and a main motor housing 5 for accommodating, wherein a brushless motor is constructed in the form of an inner rotor or an outer rotor in the main motor housing 5. It also includes a motor rear end cover 4 and a circuit board 1 integrated with a main command device capable of controlling the start, speed regulation, braking and reverse of the brushless motor. The circuit board 1 can be a PCB printed circuit board. The circuit board 1 is composed of a first surface 1-1 and a second surface 1-2 arranged oppositely, and electronic components are formed on the circuit board 1 by electronic surface mounting technology. The motor rear end cover 4 includes an inner end surface 4-3 facing the interior 6 of the brushless motor and an outer end surface 4-8 arranged opposite to the inner end surface 4-3. The motor rear end cover 4 and the motor main housing 5 are detachably installed, which is conducive to the convenient assembly of the motor rear end cover 4. The first surface 1-1 is arranged on the inner end surface 4-3, see Figure 3, wherein the first surface 1-1 is almost completely fitted with the inner end surface 4-3. The first surface 4-3 of the circuit board 1 is almost completely fitted with the inner end surface 4-3 of the motor rear end cover 4, which improves the heat conduction efficiency between the circuit board 1 and the motor rear end cover 4, and facilitates the circuit board 1 to conduct heat out through the motor rear end cover 4, thereby reducing the internal temperature of the circuit board 1 and increasing the service life of the circuit board 1.

[0026] Preferably, the first surface 4-3 is close to a smooth surface; the second surface 1-2 is arranged with electronic components. Ideally, the first surface 4-3 is a smooth surface without any electronic components mounted thereon, which can increase the contact area with the inner end surface 4-3 and improve the heat conduction efficiency. It is also inevitable that there are solder points or partial devices of electronic components on the first surface 4-3. In this case, a recess 4-7 can also be opened on the inner end surface 4-3 to accommodate the above. Preferably, see Figure 5 A plurality of heat dissipation fins 4-4 are arranged on the outer end surface 4-8 opposite to the inner end surface 4-3. The heat dissipation fins 4-4 can increase the heat dissipation area of ​​the rear end 4 of the motor, and similarly, are conducive to improving the heat conduction efficiency.

[0027] In this embodiment, see Figure 2 , Figure 3 as well as Figure 4 The inner end surface 4-3 is formed with a locking position for fixing the circuit board 1, wherein the locking position is configured as a bolt hole 4-2 that is concave with respect to the inner end surface 4-3. The bolt holes 4-2 are arranged in a triangular shape on the inner end surface 4-3. When assembling the circuit board 1, the circuit board 1 is fixed to the inner end surface 4-3 by bolts 10, and the locking is more secure.

[0028] In this embodiment, the rear end cover 4 of the motor close to the outer end surface 4-8 is circumferentially Z, such as Figure 2 In the direction of the arrow, a connecting ear 4-6 is formed for connecting bolts when fixing the rear end cover 4 of the motor, wherein the connecting ear 4-6 partially extends out of the rear end cover 4 of the motor; the rear end cover 4 of the motor is also provided with a hole portion 4-5 for inserting a wiring harness (not shown) on the circumferential direction Z, and the wiring harness (not shown) is electrically connected to the circuit board 1.

[0029] In this embodiment, continue to refer to Figure 1 , Figure 2 as well as Figure 3 , a part of the pipe 4-1 is formed on the outer end surface 4-8, and another part of the pipe 4-1 is formed on the inner end surface 4-3 and passes through the circuit board 1; the pipe 4-1 is used to allow air to pass through. When the brushless motor is used in a compressor, the pipe 4-1 can be used to provide air to the air compression unit or return air from the direction of the pneumatic equipment, which is beneficial to the heat dissipation of the circuit board 1 by heat convection. The pipe 4-1 is made into a round shape for easy plug-in adaptation.

[0030] In this embodiment, continue to refer to Figure 2 as well as Figure 3 A stopper 4-9 is formed on the outer wall surface of the pipe axial direction S formed on the inner end surface 4-3. When the circuit board 1 is assembled to the stopper 4-9 position, it is used to limit the assembly position of the circuit board 1.

[0031] Preferably, the stopper portion 4-9 is constructed as a convex rib 4-1-1 having a length, the length direction of which is consistent with the axial direction S of the pipe, and the circuit board 1 is formed with a recessed portion 4-7 assembled corresponding to the convex rib 4-1-1.

[0032] In this practical example, the motor rear end cover 4 is made of aluminum. Other metal materials that are easy to process and have heat dissipation properties can also be selected for manufacturing.

[0033] Preferably, the rear end cover 4 of the motor is manufactured in one piece, thereby increasing the structural strength of the rear end cover 4 of the motor.

[0034] It should be pointed out that the above preferred embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A brushless motor for an air compressor, comprising: A stator, a rotor and a main motor housing (5) for accommodating the stator, a rotor and a main motor housing (5) for accommodating the stator, a rear end cover (4) of the motor and a circuit board (1) integrated with a main command device capable of controlling the start, speed regulation, braking and reversal of the brushless motor, wherein the circuit board (1) comprises a first surface (1-1) and a second surface (1-2) arranged opposite to each other; The rear end cover (4) of the motor includes an inner end face (4-3) facing the interior of the brushless motor and an outer end face (4-8) arranged opposite to the inner end face (4-3), and is characterized in that the rear end cover (4) of the motor is detachably mounted on the main housing (5) of the motor, and the first face (1-1) is arranged on the inner end face (4-3), wherein the first face (1-1) and the inner end face (4-3) are almost completely fitted.

2. A brushless motor for an air compressor according to claim 1, characterized in that: The first surface (1-1) is close to the light surface; the second surface (1-2) is arranged with electronic components.

3. A brushless motor for an air compressor according to claim 1, characterized in that: A plurality of heat dissipation fins (4-4) are arranged on the outer end surface (4-8) opposite to the inner end surface (4-3).

4. A brushless motor for an air compressor according to claim 1, characterized in that: A locking position for fixing the circuit board (1) is formed on the inner end surface (4-3), wherein the locking position is configured as a bolt hole (4-2) that is concave relative to the inner end surface (4-3).

5. A brushless motor for an air compressor according to claim 1, characterized in that: A connecting lug (4-6) is formed in the circumferential direction of the rear end cover (4) of the motor near the outer end surface (4-8) for connecting bolts (10) when fixing the rear end cover (4) of the motor, wherein the connecting lug (4-6) partially extends out of the rear end cover (4) of the motor; a hole portion (4-5) for inserting a wiring harness is also formed in the circumferential direction (Z) of the rear end cover (4) of the motor, and the wiring harness is electrically connected to the circuit board (1).

6. A brushless motor for an air compressor according to claim 1, characterized in that: A portion of the duct (4-1) is formed on the outer end surface (4-8), and another portion of the duct (4-1) is formed on the inner end surface (4-3) and passes through the circuit board (1); the duct (4-1) is used to allow air to pass through.

7. A brushless motor for an air compressor according to claim 6, characterized in that: A stopper (4-9) is configured on the axial outer wall surface of the pipe (4-1) formed on the inner end surface (4-3) and is used to limit the assembly position of the circuit board (1) when the circuit board (1) is assembled to the position of the stopper (4-9).

8. A brushless motor for an air compressor according to claim 7, characterized in that: The stopper portion (4-9) is constructed as a convex rib (4-1-1) having a length, the length direction of which is consistent with the axial direction of the pipe (4-1), and the circuit board (1) is formed with a recessed portion (1-3) corresponding to the convex rib (4-1-1).

9. A brushless motor for an air compressor according to claim 7, characterized in that: The material used to manufacture the rear end cover (4) of the motor includes aluminum.

10. A brushless motor for an air compressor according to any one of claims 1 to 9, characterized in that: The rear end cover (4) of the motor is manufactured in an integral manner.

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