Motor end cover

Abstract

The utility model discloses a motor end cover, which comprises an end cover body and a conductive assembly, a plurality of mounting shells are symmetrically arranged on two sides of the mounting side of the end cover body, the conductive assembly comprises conductive sheets, connecting pieces and capacitors, the upper ends of the conductive sheets are exposed in the mounting shells, and the conductive sheets are electrically connected with the capacitors through the connecting pieces. The connecting part is used for being electrically connected with the upper end of the conducting strip, the clamping part extends from the lower end of the connecting part along the side wall of the mounting shell, the supporting part extends from the tail end of the clamping part to the center line, the lower end of the capacitor abuts against the supporting part, and the two sides of the capacitor abut against the clamping part. And a baffle plate for limiting the front and rear ends of the capacitor is arranged between the mounting shells at one end. According to the utility model, electromagnetic interference generated by vibration of the capacitor is reduced by limiting the capacitor, so that the capacitor can better exert filtering and energy storage effects, high-frequency noise and electromagnetic radiation generated by the motor are effectively inhibited, and the electromagnetic compatibility level of the motor is improved.

Description

Technical Field

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

[0002] During the operation of a motor with brushes and a commutator, electrical sparks and radio frequency (RF) interference signals are generated when the commutator rotates relative to the carbon brushes. These RF interference signals can interfere with circuits connected to the power supply or other unshielded circuits near the motor. Chokes or capacitors are typically installed on the motor to filter out this RF interference signal. In existing technology, the capacitors in the motor end cover are prone to movement during motor operation or under external force, thus compromising the continuity of their filtering effect and necessitating an improvement in the motor's EMC rating. Summary of the Invention

[0003] This application provides a motor end cover that limits the capacitor, thereby reducing electromagnetic interference caused by capacitor vibration. This allows the capacitor to better perform its filtering and energy storage functions, effectively suppressing high-frequency noise and electromagnetic radiation generated by the motor, and improving the electromagnetic compatibility level of the motor.

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

[0005] The end cap body has several mounting shells symmetrically arranged on both sides of the mounting side.

[0006] The conductive component includes a conductive sheet exposed at its upper end within a mounting housing, a connector disposed at the upper end of the mounting housing, and a capacitor disposed between the mounting housings. The conductive sheet is electrically connected to the capacitor via the connector. The connector includes a connecting portion for electrically connecting to the upper end of the conductive sheet, a clamping portion extending from the lower end of the connecting portion along the side wall of the mounting housing, and a support portion extending from the end of the clamping portion toward the centerline. The lower end of the capacitor abuts against the support portion, and both sides of the capacitor abut against the clamping portion. A baffle for limiting the front and rear ends of the capacitor is disposed between the mounting housings at one end.

[0007] Compared with the prior art, the advantages of this utility model are:

[0008] This design provides comprehensive, multi-point stability and limitation for the capacitor through the clamping and supporting parts of the connector, as well as the baffle. The clamping part extends from the lower end of the connector along the side wall of the mounting housing, tightly clamping both sides of the capacitor to prevent it from moving horizontally. The supporting part extends from the end of the clamping part toward the centerline, providing solid support for the lower end of the capacitor to prevent it from swaying vertically. The baffle is placed between the mounting housings to limit the front and rear ends of the capacitor, ensuring that the capacitor remains fixed in the mounting housing. This stable capacitor limiting design helps reduce the vibration and movement of the capacitor during motor operation, thereby reducing the electromagnetic interference caused by the capacitor's vibration. This design allows the capacitor to better perform its filtering and energy storage functions, effectively suppressing high-frequency noise and electromagnetic radiation generated by the motor, and improving the electromagnetic compatibility level of the motor.

[0009] Stable capacitor limiting not only helps maintain the stability of the capacitor's position, but also ensures a reliable electrical connection between the conductive plate and the capacitor. The connector design allows the conductive plate to make tight contact with the capacitor's electrode terminals, reducing the risk of electrical failures due to poor contact.

[0010] As an improvement, a limiting protrusion is provided on the end cap body corresponding to the rear end of the capacitor. The limiting protrusion is located between the mounting shells. The front end of the capacitor abuts against the baffle, and the rear end of the capacitor abuts against the limiting protrusion. The front end of the capacitor abuts against the baffle, and the rear end is blocked by the limiting protrusion. This double fixing method can ensure that the position of the capacitor is stable in the mounting shell and is not easy to shake or shift.

[0011] As an improvement, the clamping part includes two clamping plates at the front and rear ends, and a spring piece between the clamping plates. An adjustment groove is provided at the connection between the mounting shell and the baffle, corresponding to the spring piece. The spring piece tends to tilt towards the side wall of the adjustment groove. Located between the two clamping plates, the spring piece has a certain degree of elasticity. When the size or shape of the capacitor changes slightly, the spring piece can adapt to these changes through its elastic deformation, thereby ensuring that the capacitor is always firmly clamped. The tendency of the spring piece to tilt towards the side wall of the adjustment groove provides a smoother path for capacitor installation, allowing the capacitor to slide more easily into the clamping part and reach the correct position under the guidance of the spring piece.

[0012] As an improvement, a bent fixing part extends upward from one side of the connector, and a mounting groove is provided on the side wall of the end cap body. The shape of the fixing part matches the shape of the bottom surface of the mounting groove, and the lower end of the fixing part abuts against the bottom surface of the mounting groove, forming a stable support structure. This design ensures that the connection between the connector and the end cap body is firm and reliable, and is not prone to loosening or falling off.

[0013] As an improvement, the conductive sheet includes several conductive parts vertically arranged at the front and rear ends of the mounting side of the end cap body, and a transition part connecting the conductive parts. The upper end of the conductive parts is exposed inside the mounting shell, and the transition part is located at the lower end of the end cap body. The bottom surface of the end cap body has a through hole for the conductive parts, and the lower end of the conductive part passes through the through hole and connects to the transition part. The end of the transition part extends to the end away from the end cap body, and the upper end of the conductive part is exposed inside the loading space. This design ensures that the current can be smoothly transmitted from inside the mounting shell through the conductive parts. The exposed conductive parts provide a larger contact area, which helps to reduce contact resistance and improve conductivity.

[0014] As an improvement, the outer walls of the front and rear ends of the end cap body are arc-shaped, and the direction of the inner walls of the front and rear ends of the end cap body is parallel to the tangent of the arc. The direction of the mounting shell and conductive parts is consistent with the direction of the inner walls of the front and rear ends of the end cap body. Since the direction of the mounting shell and conductive parts is consistent with the direction of the inner walls of the front and rear ends of the end cap body, this design promotes tight assembly between components. It reduces the gaps between components during assembly, making the overall structure more compact and stable.

[0015] As an improvement, a bearing housing is located at the center of the end cap body, and a brush holder extending to the side of the conductive sheet near the bearing housing is provided. The brush holder is centrally symmetrical, and a brush is mounted on the brush holder. The extension of the brush holder to the side near the bearing housing ensures close contact between the brush and the conductive component. This design helps reduce resistance and energy loss during power transmission, improving power transmission efficiency. At the same time, the centrally symmetrical brush holder layout helps ensure uniform current distribution on the conductive sheet, further improving electrical performance.

[0016] As an improvement, the brush holder includes a fixing section disposed between the inner sidewalls of the mounting housing and the front and rear ends of the end cover body, and a mounting section extending from the fixing section to the side near the bearing seat. The upper end of the conductive part is electrically connected to the fixing section through a connecting piece. The brush is mounted at the end of the mounting section. The fixing section of the brush holder is aligned with the inner sidewalls of the front and rear ends of the end cover body, making the brush holder compact.

[0017] As an improvement, the connecting piece includes a mounting end electrically connected to the upper end of the conductive part, and a connecting end extending from the lower end of the mounting end along the fixed section and the first end of the mounting section. The connecting end is fixedly connected to the fixed section and the first end of the mounting section, and the mounting end is directly electrically connected to the upper end of the conductive part, ensuring that power can be stably transmitted from the conductive part to the connecting piece. The connecting end extends along the fixed section and the first end of the mounting section and is fixedly connected, forming a stable electrical connection path, reducing the number of electrical connection points, thereby reducing the risk of electrical faults caused by poor connections.

[0018] As an improvement, the connecting part is provided with a connecting through hole corresponding to the conductive part, and the mounting end is provided with a mounting through hole corresponding to the conductive part. The upper end of the conductive part passes through the connecting through hole and the mounting through hole in sequence and is electrically connected to the connecting part and the mounting end. The conductive part is directly connected to the connecting part and the mounting end through the connecting through hole and the mounting through hole, which reduces intermediate links and improves the reliability of electrical connection. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 An exploded view of an electric motor end cover structure;

[0021] Figure 2 A schematic diagram of the front view structure of a motor end cover;

[0022] Figure 3 This is an exploded view of the end cap body and connecting components.

[0023] Figure 4 This is a schematic diagram of the rear view structure of a motor end cover.

[0024] The markings in the above figures are as follows: 1. End cap body; 1.1. Mounting shell; 1.2. Baffle; 1.3. Limiting protrusion; 1.4. Mounting groove; 1.5. Through hole for the electrode sheet; 2. Conductive sheet; 2.1. Conductive part; 2.2. Transition part; 3. Connector; 3.1. Connecting part; 3.1.1. Connecting through hole; 3.2. Clamping part; 3.2.1. Clamping piece; 3.2.2. Spring piece; 3.3. Support part; 3.4. Fixing part; 4. Capacitor; 5. Adjustment groove; 6. Bearing seat; 7. Brush seat; 7.1. Fixing section; 7.2. Mounting section; 8. Brush; 9. Connecting piece; 9.1. Mounting end; 9.1.1. Mounting through hole; 9.2. Connecting end. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 4As shown, a motor end cover includes an end cover body 1 and a conductive assembly. A plurality of mounting shells 1.1 are symmetrically arranged on both sides of the mounting side of the end cover body 1. The conductive assembly includes a conductive sheet 2 with its upper end exposed inside the mounting shell 1.1, a connector 3 disposed at the upper end of the mounting shell 1.1, and a capacitor 4 disposed between the mounting shells 1.1. The conductive sheet 2 is electrically connected to the capacitor 4 through the connector 3. The connector 3 includes a connecting portion 3.1 for electrically connecting to the upper end of the conductive sheet 2, a clamping portion 3.2 extending from the lower end of the connecting portion 3.1 along the side wall of the mounting shell 1.1, and a supporting portion 3.3 extending from the end of the clamping portion 3.2 toward the centerline. The lower end of the capacitor 4 abuts against the supporting portion 3.3, and both sides of the capacitor 4 abut against the clamping portion 3.2. A baffle 1.2 for limiting the front and rear ends of the capacitor 4 is disposed between one end of the mounting shells 1.1.

[0027] The end cap body 1 is provided with a limiting protrusion 1.3 corresponding to the rear end of the capacitor 4. The limiting protrusion 1.3 is located between the mounting shells 1.1. The front end of the capacitor 4 abuts against the baffle 1.2, and the rear end of the capacitor 4 abuts against the limiting protrusion 1.3.

[0028] The clamping part 3.2 includes two clamping pieces 3.2.1 disposed at the front and rear ends, and a spring piece 3.2.2 disposed between the clamping pieces 3.2.1. An adjustment groove 5 is provided at the connection between the mounting shell 1.1 and the baffle 1.2, and the connection part 3.1 is provided with the spring piece 3.2.2. The spring piece 3.2.2 tends to tilt toward the side wall of the adjustment groove 5.

[0029] One side connector 3 extends upward and is provided with a bent fixing part 3.4. The side wall of the end cap body 1 is provided with a mounting groove 1.4. The shape of the fixing part 3.4 is adapted to the shape of the bottom surface of the mounting groove 1.4, and the lower end of the fixing part 3.4 abuts against the bottom surface of the mounting groove 1.4.

[0030] The conductive sheet 2 includes several conductive parts 2.1 vertically arranged at the front and rear ends of the mounting side of the end cap body 1, and a transition part 2.2 connecting the conductive parts 2.1. The upper end of the conductive part 2.1 is exposed inside the mounting shell 1.1, and the transition part 2.2 is arranged at the lower end of the end cap body 1. The bottom surface of the end cap body 1 is provided with a conductive sheet through hole 1.5 corresponding to the conductive part 2.1. The lower end of the conductive part 2.1 passes through the conductive sheet through hole 1.5 and connects with the transition part 2.2. The end of the transition part 2.2 extends to one end away from the end cap body 1.

[0031] The outer sidewalls of the front and rear ends of the end cap body 1 are arc-shaped, and the inner sidewalls of the front and rear ends of the end cap body 1 are parallel to the tangent of the arc. The mounting shell 1.1 and the conductive part 2.1 are in the same direction as the inner sidewalls of the front and rear ends of the end cap body 1.

[0032] A bearing seat 6 is provided at the center of the end cap body 1, and a brush seat 7 extending to the side of the conductive sheet 2 is provided on one side. The brush seat 7 is centrally symmetrical, and a brush 8 is installed on the brush seat 7.

[0033] The brush holder 7 includes a fixing section 7.1 disposed between the inner sidewalls of the mounting housing 1.1 and the front and rear ends of the end cover body 1, and a mounting section 7.2 extending from the fixing section 7.1 to the side near the bearing seat 6. The upper end of the conductive part 2.1 is electrically connected to the fixing section 7.1 through a connecting piece 9, and the brush 8 is mounted at the end of the mounting section 7.2.

[0034] The connecting piece 9 includes a mounting end 9.1 electrically connected to the upper end of the conductive part 2.1, and a connecting end 9.2 extending from the lower end of the mounting end 9.1 along the fixed section 7.1 and the first end of the mounting section 7.2. The connecting end 9.2 is fixedly connected to the fixed section 7.1 and the first end of the mounting section 7.2.

[0035] The connecting part 3.1 is provided with a connecting through hole 3.1.1 corresponding to the conductive part 2.1, and the mounting end 9.1 is provided with a mounting through hole 9.1.1 corresponding to the conductive part 2.1. The upper end of the conductive part 2.1 passes through the connecting through hole 3.1.1 and the mounting through hole 9.1.1 in sequence and is electrically connected to the connecting part 3.1 and the mounting end 9.1.

[0036] The upper end of the conductive part 2.1 passes through the conductive through hole 1.5 and the mounting shell 1.1, so that the upper end of the conductive part 2.1 is exposed. The transition part 2.2 is located at the lower end of the end cap body 1. The upper end of the conductive part 2.1 passes through the connecting through hole 3.1.1, so that the connecting part 3.1 is electrically connected to the conductive part 2.1. The lower end of the connecting part 3.1 abuts against the upper end of the mounting shell 1.1. One side of the clamping part 3.2 abuts against the side wall of the mounting shell 1.1. The bearing seat 6 is located at the center of the end cap body 1. The fixing section 7.1 is located between the inner side walls of the front and rear ends of the mounting shell 1.1 and the end cap body 1. The mounting section 7.2 extends from the fixing section 7.1 to the end cap body 1. Near the bearing housing 6, the brush 8 is installed at the end of the mounting section 7.2. The brush housing 7 is centrally symmetrical. The upper end of the conductive part 2.1 passes through the mounting through hole 9.1.1, so that the upper end of the conductive part 2.1 is electrically connected to the mounting end 9.1. The connecting end 9.2 is fixedly connected to the fixed section 7.1 and the beginning of the mounting section 7.2. The capacitor 4 is installed such that the two sides of the capacitor 4 abut against the clamping part 3.2, the lower end of the capacitor 4 abuts against the support part 3.3, the front end of the capacitor 4 abuts against the baffle 1.2, and the rear end of the capacitor 4 abuts against the limiting protrusion 1.3. At this time, the spring piece 3.2.2 has a slight tendency to tilt towards the side wall of the adjustment groove 5. When the capacitor 4 is removed, the finger can pass through the adjustment groove 5 to pick up the capacitor 4.

[0037] 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. A motor end cover, characterized in that, include: The end cap body has several mounting shells symmetrically arranged on both sides of the mounting side; A conductive component includes a conductive sheet exposed at its upper end within a mounting housing, a connector disposed at the upper end of the mounting housing, and a capacitor disposed between the mounting housings. The conductive sheet is electrically connected to the capacitor via the connector. The connector includes a connecting portion for electrically connecting to the upper end of the conductive sheet, a clamping portion extending from the lower end of the connecting portion along the side wall of the mounting housing, and a supporting portion extending from the end of the clamping portion toward the centerline. The lower end of the capacitor abuts against the supporting portion, and both sides of the capacitor abut against the clamping portion. A baffle for limiting the front and rear ends of the capacitor is disposed between the mounting housings at one end.

2. The motor end cover according to claim 1, characterized in that: The end cap body is provided with a limiting protrusion at the rear end of the capacitor. The limiting protrusion is disposed between the mounting shells. The front end of the capacitor abuts against the baffle, and the rear end of the capacitor abuts against the limiting protrusion.

3. The motor end cover according to claim 1, characterized in that: The clamping part includes two clamping pieces disposed at the front and rear ends and a spring piece disposed between the clamping pieces. The connection between the mounting shell and the baffle and the connection part are provided with adjustment grooves corresponding to the spring piece. The spring piece tends to tilt toward the side wall of the adjustment groove.

4. A motor end cover according to claim 1, characterized in that: One side of the connector extends upward and is provided with a bent fixing part. The side wall of the end cap body is provided with a mounting groove. The shape of the fixing part is adapted to the shape of the bottom surface of the mounting groove, and the lower end of the fixing part abuts against the bottom surface of the mounting groove.

5. A motor end cover according to claim 1, characterized in that: The conductive sheet includes several conductive parts vertically arranged at the front and rear ends of the end cap body mounting side, and a transition part connecting the conductive parts. The upper end of the conductive part is exposed inside the mounting shell. The transition part is located at the lower end of the end cap body. The bottom surface of the end cap body is provided with a conductive sheet through hole corresponding to the conductive part. The lower end of the conductive part passes through the conductive sheet through hole and connects to the transition part. The end of the transition part extends to one end away from the end cap body.

6. A motor end cover according to claim 5, characterized in that: The outer sidewalls of the front and rear ends of the end cap body are arc-shaped, and the inner sidewalls of the front and rear ends of the end cap body are parallel to the tangent direction of the arc. The mounting shell and conductive part are aligned with the inner sidewalls of the front and rear ends of the end cap body.

7. A motor end cover according to claim 5, characterized in that: A bearing seat is provided at the center of the end cap body, and a brush holder is provided on one side of the conductive sheet, extending to the side close to the bearing seat. The brush holder is centrally symmetrical, and a brush is installed on the brush holder.

8. A motor end cover according to claim 7, characterized in that: The brush holder includes a fixed section disposed between the inner sidewalls of the mounting housing and the front and rear ends of the end cover body, and a mounting section extending from the fixed section to the side near the bearing seat. The upper end of the conductive part is electrically connected to the fixed section through a connecting piece, and the brush is mounted at the end of the mounting section.

9. A motor end cover according to claim 8, characterized in that: The connecting piece includes a mounting end electrically connected to the upper end of the conductive part, and a connecting end extending from the lower end of the mounting end along the fixed section and the first end of the mounting section. The connecting end is fixedly connected to the fixed section and the first end of the mounting section.

10. A motor end cover according to claim 9, characterized in that: The connecting part is provided with a connecting through hole corresponding to the conductive part, and the mounting end is provided with a mounting through hole corresponding to the conductive part. The upper end of the conductive part passes through the connecting through hole and the mounting through hole in sequence and is electrically connected to the connecting part and the mounting end.

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