Motor end cover assembly

Abstract

The utility model discloses a motor end cover assembly comprising an end cover body and a conductive assembly, the end cover body is provided with a cavity, the conductive assembly is arranged in the cavity, the conductive assembly comprises a circuit board arranged at one end of the cavity, and the outer wall of the end cover body is provided with a plurality of limiting bosses extending upwards towards the direction of the circuit board. The circuit board is provided with an installation part extending outwards corresponding to the limiting boss, a grounding conducting strip used for grounding is integrally installed at the upper end of the installation part, and the grounding conducting strip is connected with the limiting boss through the installation part. According to the utility model, a grounding path is directly established through rigid connection of the mounting part and the limiting boss, so that the whole structure is more compact and concise and convenient to mount.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor end cover assembly. Background Technology

[0002] The motor end cover is a key motor component used to support components such as brushes, inductors, connectors, and motor protection devices. In existing technology, the circuit board in the motor end cover is grounded by connecting it to the end cover housing through a grounding wire. However, the grounding wire has limitations in wire diameter and contact resistance (such as solder joints and wire resistance), which leads to increased impedance under high-frequency signals or high currents. At the same time, the grounding wire may loosen due to vibration or thermal expansion and contraction, resulting in poor contact. Furthermore, the grounding wire needs to be fixed separately (e.g., by welding or crimping terminals), increasing manual labor time and procedures. Summary of the Invention

[0003] This application provides a motor end cover assembly that establishes a grounding path directly through a rigid connection between the mounting part and the limiting boss, making the overall structure more compact and simple, and easier to install.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a motor end cover assembly, comprising...

[0005] End cap body, the end cap body is provided with a cavity;

[0006] A conductive component is disposed within a cavity, and the conductive component includes a circuit board disposed at one end of the cavity.

[0007] The outer wall of the end cap body extends upward toward the circuit board and is provided with several limiting bosses. The circuit board is provided with a mounting part extending outwards corresponding to the limiting bosses. A grounding conductive plate for grounding is integrated and installed at the upper end of the mounting part. The grounding conductive plate is connected to the limiting bosses through the mounting part.

[0008] Compared with the prior art, the advantages of this utility model are:

[0009] The rigid connection between the mounting part and the limiting boss directly establishes a grounding path, eliminating the complex wiring of traditional external grounding wires, eliminating the risk of wire detachment, and making the overall structure more compact and simple. At the same time, the direct contact between the grounding conductive plate and the limiting boss forms a short-distance conductive loop, which significantly reduces the loop impedance and improves the charge release efficiency compared to external grounding wires.

[0010] Meanwhile, the limiting boss and the extended structure of the mounting part form a geometric interlock, which can maintain the physical stability of the grounding connection even under vibration and impact, avoiding poor contact caused by shaking in traditional cable connections. In addition, the grounding conductive plate is pre-integrated with the circuit board mounting part, and the grounding connection can be automatically completed by simply aligning it with the limiting boss during assembly, simplifying the installation process and eliminating manual wiring errors.

[0011] As an improvement, the conductive component also includes a first conductive connector symmetrically arranged on both sides of the cavity. The first conductive connector extends upward and has a first conductive part. A conductive connecting piece is integrated and installed on the upper end of the circuit board near the first conductive part. The rear end of the first conductive part abuts against the front end of the conductive connecting piece. The direct abutment between the first conductive part and the conductive connecting piece shortens the signal transmission path, reduces parasitic inductance, and improves the stability of signal transmission.

[0012] As an improvement, the conductive component also includes inductors symmetrically arranged on both sides of the cavity. The rear end of the inductor is provided with a first wire electrically connected to the first conductive part. The middle part of the first conductive part is recessed from both sides towards the center and a first limiting groove for embedding the first wire is provided. The first wire is embedded in the first limiting groove so that the first conductive part limits the first wire and improves the vibration resistance level of the first wire.

[0013] As an improvement, the conductive component also includes a second conductive connector symmetrically arranged on both sides of the cavity. The second conductive connector extends upward and is provided with a second conductive part. The front end of the inductor is provided with a second wire electrically connected to the second conductive part. The upper end of the second conductive part is recessed downward and is provided with a second limiting groove for embedding the second wire. The second wire is embedded in the interior of the second limiting groove so that the second conductive part limits the second wire and improves the vibration resistance level of the second wire.

[0014] As an improvement, a bearing housing is provided at the center of the cavity, and a brush holder is provided on one side of the second conductive connector, extending to the side near the bearing housing. The brush holders are symmetrically arranged, and the inductor is electrically connected to the brush holders through the second conductive part. A brush is installed at the end of the brush holder. The brush holders are symmetrically arranged on one side of the second conductive connector and extend to the position near the bearing housing, which helps to balance the electromagnetic force and mechanical force during motor operation, reduce vibration and noise, and improve the operating stability of the motor.

[0015] As an improvement, the second conductive connector also includes a joint. The side of the joint near the brush holder is provided with several limiting grooves along the brush holder. The first end of the brush holder is embedded in the limiting groove. The limiting groove ensures the precise positioning of the brush holder in the lateral, axial and circumferential directions through the composite limiting structure of the side wall, bottom surface and end face, eliminating the risk of assembly misalignment. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a rear view of a motor end cover assembly structure;

[0018] Figure 2This is a schematic diagram of a motor end cover assembly structure, wherein the left side of the schematic diagram shows the structure of the first conductive part after the first wire is cut off;

[0019] Figure 3 This is a top view of a motor end cover assembly structure.

[0020] The markings in the above figures are as follows: 1. End cap body; 1.1. Cavity; 1.2. Limiting boss; 2. Circuit board; 2.1. Mounting part; 2.2. Grounding conductive piece; 2.3. Conductive connecting piece; 3. First conductive connector; 3.1. First conductive part; 3.1.1. First limiting groove; 4. Inductor; 5. First wire; 6. Second conductive connector; 6.1. Second conductive part; 6.1.1. Second limiting groove; 6.2. Joint part; 6.2.1. Limiting groove; 7. Second wire; 8. Bearing seat; 9. Brush holder; 10. Brush. Detailed Implementation

[0021] In this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] A motor end cover assembly includes an end cover body 1 and a conductive component. The end cover body 1 has a cavity 1.1, and the conductive component is disposed within the cavity 1.1. The conductive component includes a circuit board 2 disposed at one end of the cavity 1.1. The outer wall of the end cover body 1 extends upward toward the circuit board 2 and is provided with a plurality of limiting bosses 1.2. The circuit board 2 extends outward corresponding to the limiting bosses 1.2 and is provided with a mounting part 2.1. A grounding conductive piece 2.2 for grounding is integrated and mounted on the upper end of the mounting part 2.1. The grounding conductive piece 2.2 is connected to the limiting bosses 1.2 through the mounting part 2.1.

[0023] The conductive component also includes a first conductive connector 3 symmetrically arranged on both sides of the cavity 1.1. The first conductive connector 3 extends upward and is provided with a first conductive part 3.1. A conductive connecting piece 2.3 is integrated and installed on the upper end of the circuit board 2 near the first conductive part 3.1. The rear end of the first conductive part 3.1 abuts against the front end of the conductive connecting piece 2.3.

[0024] The conductive component also includes inductors 4 symmetrically arranged on both sides of the cavity 1.1. The rear end of the inductor 4 is provided with a first wire 5 electrically connected to the first conductive part 3.1. The middle part of the first conductive part 3.1 is recessed from both sides towards the center and is provided with a first limiting groove 3.1.1 for embedding the first wire 5.

[0025] The conductive component also includes a second conductive connector 6 symmetrically arranged on both sides of the cavity 1.1. The second conductive connector 6 extends upward to provide a second conductive part 6.1. The front end of the inductor 4 is provided with a second wire 7 electrically connected to the second conductive part 6.1. The upper end of the second conductive part 6.1 is recessed downward to provide a second limiting groove 6.1.1 for embedding the second wire 7.

[0026] A bearing seat 8 is provided at the center of the cavity 1.1. A brush seat 9 extending to the side of the second conductive connector 6 is provided on one side. The brush seats 9 are symmetrically arranged. The inductor 4 is electrically connected to the brush seat 9 through the second conductive part 6.1. A brush 10 is installed at the end of the brush seat 9.

[0027] The second conductive connector 6 also includes a joint portion 6.2. The joint portion 6.2 has several limiting grooves 6.2.1 along the brush holder 9 on the side near the brush holder 9. The head end of the brush holder 9 is embedded in the limiting groove 6.2.1.

[0028] The circuit board 2 is aligned and assembled with the limiting boss 1.2 of the end cover body 1 via the mounting part 2.1, so that the grounding conductive piece 2.2 is electrically connected to the limiting boss 1.2 via the mounting part 2.1. The bearing seat 8 is set at the center of the cavity 1.1. The first conductive connector 3 is symmetrically arranged on both sides of the rear end of the cavity 1.1, so that the rear end of the first conductive part 3.1 abuts against the conductive connector 2.3 of the circuit board 2. The second conductive connector 6 is symmetrically arranged on both sides of the front end of the cavity 1.1. The inductor 4 is set on the first conductive connector 3. The second conductive connector 6 is located on the outside, and the first wire 5 is embedded in the first limiting groove 3.1.1 to be electrically connected to the first conductive part 3.1. The second wire 7 is embedded in the second limiting groove 6.1.1 to be electrically connected to the second conductive part 6.1. The bearing seat 8 is located at the center of the cavity 1.1, and the brush 10 is fixed to the end of the brush holder 9. The limiting groove 6.2.1 of the joint 6.2 constrains the position of the head end of the brush holder 9 and determines the tilt angle of the brush holder 9, so that the brush holder 9 is symmetrically installed on both sides of the cavity 1.1.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An electric machine end cap assembly, characterized by: include End cap body, wherein the end cap body is provided with a cavity; A conductive component is disposed within a cavity, the conductive component including a circuit board disposed at one end of the cavity; The outer wall of the end cap body extends upward toward the circuit board and is provided with a plurality of limiting protrusions. The circuit board is provided with a mounting part extending outward corresponding to the limiting protrusions. A grounding conductive sheet for grounding is integrated and mounted on the upper end of the mounting part. The grounding conductive sheet is connected to the limiting protrusions through the mounting part.

2. A motor end bell assembly as set forth in claim 1 wherein: The conductive component further includes a first conductive connector symmetrically arranged on both sides of the cavity. The first conductive connector extends upward and is provided with a first conductive part. A conductive connecting piece is integrated and installed on the upper end of the circuit board near the first conductive part. The rear end of the first conductive part abuts against the front end of the conductive connecting piece.

3. A motor end bell assembly as set forth in claim 2 wherein: The conductive component also includes inductors symmetrically arranged on both sides of the cavity. The rear end of the inductor is provided with a first wire electrically connected to the first conductive part. The middle part of the first conductive part is recessed from both sides towards the center and is provided with a first limiting groove for embedding the first wire.

4. A motor end bell assembly as set forth in claim 3 wherein: The conductive component further includes a second conductive connector symmetrically arranged on both sides of the cavity. The second conductive connector extends upward and is provided with a second conductive part. The front end of the inductor is provided with a second wire electrically connected to the second conductive part. The upper end of the second conductive part is recessed downward and is provided with a second limiting groove for embedding the second wire.

5. A motor end bell assembly as set forth in claim 4 wherein: A bearing seat is provided at the center of the cavity, and a brush holder is provided on one side of the second conductive connector, extending to the side close to the bearing seat. The brush holders are symmetrically arranged, and the inductor is electrically connected to the brush holders through the second conductive part. A brush is installed at the end of the brush holder.

6. A motor end bell assembly as set forth in claim 5 wherein: The second conductive connector further includes a joint portion, wherein a plurality of limiting grooves are provided along the brush holder on the side of the joint portion near the brush holder, and the first end of the brush holder is embedded in the limiting grooves.

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