Brushless motor with built-in circuit board

Abstract

The utility model provides a brushless motor with a built-in circuit board, and the motor is characterized in that the motor comprises an end cover; the controller assembly is arranged in the end cover; the upper end of the rotor is connected with the controller assembly; the shell is mounted at the lower end of the rotor; the impeller is mounted at the lower end of the rotor and outside the shell; the rear cover is arranged outside the shell in a covering manner; the protection shell is arranged in the controller shell, and the sealing ring and the bottom plate are arranged at the bottom of the controller shell to carry out sealing protection on the circuit board, so that internal faults are prevented.

Description

Technical Field

[0001] The utility model relates to a brushless motor with a built-in circuit board. Background Art

[0002] The electric fuel pump generally adopts a mode in which the controller and the brushless motor are separated. There is also a mode in the prior art in which the controller (circuit board) and the brushless motor are combined.

[0003] The existing controller (circuit board) is closely connected to the brushless motor, so the liquid in the brushless motor can easily penetrate into the cavity of the controller and cause the controller to malfunction. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned problems in the existing technology and propose a brushless motor with a built-in circuit board, which seals and protects the circuit board by arranging a protective shell inside the controller housing and arranging a sealing ring and a bottom plate at the bottom of the controller housing to prevent internal faults.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A brushless motor with a built-in circuit board, characterized in that it includes:

[0006] End caps;

[0007] a controller assembly disposed in the end cover;

[0008] A rotor, an upper end of which is connected to the controller assembly;

[0009] A housing mounted at the lower end of the rotor;

[0010] An impeller is mounted at the lower end of the rotor and is outside the casing;

[0011] A rear cover, which is arranged outside the housing;

[0012] A shell for wrapping the rotor and the impeller is arranged between the lower end of the end cover and the upper end of the rear cover, and a stator is arranged outside the rotor.

[0013] Furthermore, the stator and the controller assembly form a stator assembly.

[0014] Furthermore, a special-shaped connector seal is provided between the controller component and the stator.

[0015] Furthermore, the controller component includes:

[0016] Controller housing;

[0017] A protective shell, which is located inside the controller housing;

[0018] A circuit board, which is embedded in the protective shell;

[0019] A sealing ring, which is attached to the lower end of the controller housing;

[0020] The bottom of the controller housing is also connected with a base plate via screws.

[0021] Furthermore, a plurality of positioning and limiting end structures are provided above the controller housing.

[0022] Furthermore, the protective shell is made of epoxy resin material.

[0023] Furthermore, the sealing ring is made of fluorosilicone rubber material.

[0024] Furthermore, the positioning and limiting end structure is a limiting column.

[0025] Furthermore, the positioning and limiting end structure is a wire clamping groove.

[0026] Compared with the prior art, the advantages of the present application are as follows: a protective shell is provided inside the controller housing, and a sealing ring and a bottom plate are provided at the bottom of the controller housing to seal and protect the circuit board, thereby preventing internal failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the schematic diagram of the motor;

[0028] Figure 2 This is a schematic diagram of the lower side of the shell removed;

[0029] Figure 3 It is a schematic diagram of the side surface of the outer shell removed;

[0030] Figure 4 This is a schematic diagram of removing the controller housing;

[0031] Figure 5 It is a circuit board schematic;

[0032] Figure 6 is a schematic diagram of the rotor position;

[0033] In the figure, 1, end cover; 2, outer shell; 3, back cover; 4, impeller; 5, casing; 6, stator; 7, connector; 8, controller casing; 811, limit column; 812, wire slot; 82, circuit board; 83, sealing ring; 84, bottom plate; 85, protective shell; 9, rotor. DETAILED DESCRIPTION

[0034] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention.

[0035] like Figure 1-6 As shown, a brushless motor with a built-in circuit board is characterized in that it includes:

[0036] End cap 1;

[0037] A controller assembly, which is arranged in the end cover 1;

[0038] A rotor 9, the upper end of which is connected to the controller assembly;

[0039] A housing 5 mounted at the lower end of the rotor 9;

[0040] An impeller 4 is mounted at the lower end of the rotor 9 and is outside the housing 5;

[0041] A rear cover 3, which is arranged outside the housing 5;

[0042] A housing 2 is provided between the lower end of the end cover 1 and the upper end of the rear cover 3 to wrap the rotor 9 , the impeller 4 , etc., and a stator 6 is provided outside the rotor 9 .

[0043] Furthermore, the stator 6 and the controller assembly form a stator assembly.

[0044] Furthermore, a special-shaped connector 7 is provided between the controller assembly and the stator 6 for sealing connection.

[0045] Furthermore, the controller component includes:

[0046] Controller housing 8;

[0047] A protective shell 85, which is located inside the controller housing 8;

[0048] A circuit board 82, which is embedded in a protective shell 85;

[0049] A sealing ring 83, which is attached to the lower end of the controller housing 8;

[0050] The bottom of the controller housing 8 is also connected to a bottom plate 84 via screws.

[0051] Furthermore, the controller housing 8 has a plurality of positioning and limiting end structures above it.

[0052] Furthermore, the protective shell 85 is made of epoxy resin material.

[0053] Furthermore, the sealing ring 83 is made of fluorosilicone rubber material.

[0054] Furthermore, the positioning and limiting end structure is a limiting column 811.

[0055] Furthermore, the positioning and limiting end structure is a wire clamping groove 812 .

[0056] The limit column 811 is based on different product requirements, and the plug can be installed for different positioning requirements; the wire slot 812 is based on different product requirements, and this wire slot can be installed for wire clamping

[0057] according to Figure 3 As shown, the limiting column 811 can be installed for a product, and the line can be clamped in the line clamping groove 812 for installing a product of another structure. The positioning and limiting end structure of this structure can be shared by multiple products.

[0058] In the present application, a plurality of positioning and limiting end structures are designed for the connection portion at the upper end of the controller housing 8 to meet the assembly requirements of oil pumps of different structures and series.

[0059] The internal circuit board 82 adopts a special-shaped sealing ring 83 made of fluorosilicone rubber and a protective shell 85 formed by epoxy resin filling to seal and protect the circuit board 82 to meet the influence of the medium on the circuit board 82 under different media.

[0060] The technical solution of the above utility model provides a solution that is significantly different from the prior art to address the technical problem that the prior art solution is too single. The parts not involved in the technical solution of this application are the same as the prior art or can be implemented by using the prior art and will not be described in detail.

[0061] The technical solutions in the above embodiments have clearly and completely described the contents of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A brushless motor with a built-in circuit board, characterized in that it include: End caps; a controller assembly disposed within the end cover; A rotor, an upper end of which is connected to the controller assembly; A housing mounted at the lower end of the rotor; An impeller is mounted at the lower end of the rotor and is outside the casing; A rear cover, which is arranged outside the housing; A housing for wrapping the rotor and the impeller is provided between the lower end of the end cover and the upper end of the rear cover, and a stator is provided outside the rotor; The controller assembly includes: a controller shell; a protective shell located inside the controller shell; a circuit board embedded in the protective shell; a sealing ring attached to the lower end of the controller shell; and a base plate connected to the bottom of the controller shell by screws.

2. The brushless motor with built-in circuit board according to claim 1, characterized in that: The stator and the controller assembly form a stator assembly.

3. The brushless motor with built-in circuit board according to claim 1, characterized in that: A special-shaped connecting piece is provided between the controller component and the stator for connection and sealing.

4. The brushless motor with built-in circuit board according to claim 1, characterized in that: A plurality of positioning and limiting end structures are provided above the controller housing.

5. The brushless motor with built-in circuit board according to claim 4, characterized in that: The protective shell is made of epoxy resin material.

6. The brushless motor with built-in circuit board according to claim 5, characterized in that: The sealing ring is made of fluorosilicone rubber material.

7. The brushless motor with built-in circuit board according to claim 4, characterized in that: The positioning and limiting end structure is a limiting column.

8. The brushless motor with built-in circuit board according to claim 7, characterized in that: The positioning and limiting end structure is a wire clamping groove.

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