Motor end cover with thermal protection function

Abstract

The utility model discloses a motor end cover with a thermal protection function, which comprises an end cover body and a conductive assembly, and the end cover body is provided with a cavity for accommodating the conductive assembly. The conductive assembly comprises a first capacitor, a second capacitor, a first conductive sheet electrically connected with one side of the first capacitor and one side of the second capacitor, and a second conductive sheet, a thermistor and a third conductive sheet which are electrically connected with the other side of the first capacitor and the other side of the second capacitor and are sequentially arranged. The first electric connecting part and the first connecting part are connected through the first step transition part, the second conducting strip comprises a second electric connecting part, a third electric connecting part and a second step transition part, and the third conducting strip comprises a fourth electric connecting part, a fifth electric connecting part and a second horizontal transition part. According to the utility model, through the ingenious layout of the first conducting strip, the second conducting strip and the third conducting strip, the space in the cavity is effectively utilized, the space occupied by the conducting strips is reduced to the greatest extent, and the overall structure of the motor end cover is more compact.

Description

Technical Field

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

[0002] During the operation of a motor with brushes and a commutator, the rotation of the commutator relative to the carbon brushes generates electrical sparks and radio frequency (RF) interference signals. 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. Currently, some motor end covers have capacitors at both the front and rear ends, resulting in longer wiring distances between them and potentially complicating the wiring arrangement within the end cover. Summary of the Invention

[0003] This application provides a motor end cover with thermal protection function. Through the ingenious arrangement of the first conductive sheet, the second conductive sheet and the third conductive sheet, the space inside the cavity is effectively utilized, the space occupied by the conductive sheets is minimized, and the overall structure of the motor end cover is more compact.

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

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

[0006] The conductive component is disposed within the cavity. The conductive component includes a first capacitor and a second capacitor respectively disposed at the front and rear ends of the cavity; a first conductive sheet electrically connecting one side of the first and second capacitors; a second conductive sheet electrically connecting the other side of the first and second capacitors; a thermistor; and a third conductive sheet. The first conductive sheet includes a first electrical connection portion vertically disposed at the front and rear ends corresponding to the first and second capacitors, and a first connecting portion inclinedly disposed on the side wall away from the end cap body. The first electrical connection portion at the front end and the first connecting portion are transitioned by a stepped first step transition portion. The first electrical connection portion located at the end is connected to the first connection portion through a first horizontal transition portion formed by bending the first electrical connection portion in a horizontal direction. The second conductive sheet includes a second electrical connection portion vertically located at the beginning end, a third electrical connection portion inclinedly located on the side wall away from the end cap body, and a second stepped transition portion that connects the second electrical connection portion and the third electrical connection portion in a stepped manner. The third conductive sheet includes a fourth electrical connection portion vertically located at the end end, a fifth electrical connection portion inclinedly located on the side wall away from the end cap body, and a second horizontal transition portion that connects the fourth electrical connection portion and the fifth electrical connection portion in a horizontal manner.

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

[0008] The design of the conductive sheet fully considers the limited space inside the motor end cover. Through the ingenious arrangement of the first, second, and third conductive sheets, every inch of space inside the cavity is effectively utilized.

[0009] The stepped design of the first and second step transition sections, as well as the horizontal connection between the first and second horizontal transition sections, not only ensures a stable connection between the conductive sheets, but also minimizes the space occupied by the conductive sheets, making the overall structure of the motor end cover more compact.

[0010] This arrangement of conductive sheets not only simplifies wiring but also reduces manufacturing and assembly difficulties. The conductive sheets have a rational structural design, are easy to process and install, and improve production efficiency.

[0011] As an improvement, the first stepped transition section includes a first transition section formed by bending the first electrical connection section towards the side wall of the end cover body in a horizontal direction, a second transition section formed by bending the first transition section in a vertical direction, and a third transition section formed by bending the second transition section in a horizontal direction. The end of the third transition section is connected to the first connection section. The first stepped transition section with multiple bends can be flexibly adjusted according to actual space requirements to adapt to different installation environments and size requirements.

[0012] As an improvement, the second stepped transition section includes a fourth transition section formed by bending the second electrical connection section horizontally toward the side wall of the end cap body, a fifth transition section formed by bending the fourth transition section vertically, and a sixth transition section formed by bending the fifth transition section horizontally. The end of the sixth transition section is connected to the third electrical connection section. The design of the second stepped transition section with multiple bends helps to save space, making the entire structure more compact and efficient. The multiple bends of the transition section provide more installation and fixing points, making the installation process of the second conductive sheet more convenient.

[0013] As an improvement, one side of the cavity has a first conductive plate mounting groove adapted to the shape of the first conductive plate. The other side of the cavity has second and third conductive plate mounting grooves adapted to the shapes of the second and third conductive plates, respectively. The front and rear ends of the cavity have first and second capacitor mounting grooves, respectively, corresponding to the first and second capacitors. The other side of the cavity has a resistor mounting groove inclinedly positioned corresponding to the thermistor. The first capacitor mounting groove, first conductive plate mounting groove, second capacitor mounting groove, third conductive plate mounting groove, resistor mounting groove, and second conductive plate mounting groove are sequentially connected. This mounting groove design helps ensure a more reliable electrical connection between the conductive plates and components. The sequential connection of the mounting grooves makes the circuit path clearer and simpler.

[0014] As an improvement, the two sides of the end cap body are set in an arc shape, and the resistor mounting slot is inclined in a direction parallel to the tangent of the arc. By setting the resistor mounting slot in an arc and making it parallel to the tangent of the arc, space can be further saved and space utilization can be improved.

[0015] As an improvement, a bearing seat is provided at the center of the cavity, and a brush seat extending to the side of the first conductive plate and the third conductive plate is provided on one side. The brush seats are symmetrically arranged, and brushes are installed on the brush seats. The symmetrical arrangement of the brush seats ensures the balance of the brushes when subjected to force, reducing vibration and noise caused by uneven force.

[0016] As an improvement, the brush holder includes a fixed section that is fixedly connected to the first electrical connection part and the fourth electrical connection part, and a mounting section extending from the fixed section to the side near the bearing housing. The brush is mounted at the end of the mounting section. The brush holder is firmly connected to the first electrical connection part and the fourth electrical connection part through the fixed section, ensuring the stability of the brush holder during motor operation.

[0017] As an improvement, the first electrical connection part and the fourth electrical connection part are provided with several connecting protrusions, and the fixed section is provided with mounting holes corresponding to the connecting protrusions. The matching design of the connecting protrusions and the mounting holes makes the connection between the first electrical connection part, the fourth electrical connection part and the fixed section more stable. This design can effectively prevent the connection from loosening or falling off due to vibration or external force during motor operation. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 Exploded view of a motor end cover structure with thermal protection function;

[0020] Figure 2 A schematic diagram of the front structure of a motor end cover with thermal protection function;

[0021] Figure 3 This is a schematic diagram of the rear view of a motor end cover with thermal protection function.

[0022] The markings in the above figures are as follows: 1. End cap body; 1.1. Cavity; 1.2. First electrode mounting slot; 1.3. Second electrode mounting slot; 1.4. Third electrode mounting slot; 1.5. First capacitor mounting slot; 1.6. Second capacitor mounting slot; 1.7. Resistor mounting slot; 2. First capacitor; 3. Second capacitor; 4. First conductive sheet; 4.1. First electrical connection part; 4.2. First connection part; 4.3. First stepped transition part; 4.3.1. First transition part; 4.3.2. Second transition part; 4.3.3. Third transition part; 4 4. First horizontal transition section; 5. Second conductive sheet; 5.1. Second electrical connection section; 5.2. Third electrical connection section; 5.3. Second stepped transition section; 5.3.1. Fourth transition section; 5.3.2. Fifth transition section; 5.3.3. Sixth transition section; 6. Thermistor; 7. Third conductive sheet; 7.1. Fourth electrical connection section; 7.2. Fifth electrical connection section; 7.3. Second horizontal transition section; 8. Bearing housing; 9. Brush holder; 9.1. Fixing section; 9.2. Mounting section; 9.3. Mounting hole; 10. Brush; 11. Connecting protrusion. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 3As shown, a motor end cover with thermal protection function 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 first capacitor 2 and a second capacitor 3 respectively disposed at the front and rear ends of the cavity 1.1, a first conductive sheet 4 electrically connecting the first capacitor 2 and the second capacitor 3 on one side, a second conductive sheet 5 electrically connecting the first capacitor 2 and the second capacitor 3 on the other side, a thermistor 6, and a third conductive sheet 7. The first conductive sheet 4 includes a first electrical connection portion 4.1 vertically disposed at the first end and the second end corresponding to the first capacitor 2 and the second capacitor 3, and a first connecting portion 4.2 inclinedly disposed on the side wall away from the end cover body 1. The first electrical connection portion 4.1 and the first connecting portion 4.2 disposed at the first end are connected by a stepped design. The first stepped transition portion 4.3 is provided for transition connection. The first electrical connection portion 4.1 and the first connection portion 4.2 at the end are connected by a first horizontal transition portion 4.4 formed by bending the first electrical connection portion 4.1 in the horizontal direction. The second conductive sheet 5 includes a second electrical connection portion 5.1 vertically provided at the beginning end, a third electrical connection portion 5.2 inclinedly provided on the side wall away from the end cap body 1, and a second stepped transition portion 5.3 that transitions between the second electrical connection portion 5.1 and the third electrical connection portion 5.2 in a stepped manner. The third conductive sheet 7 includes a fourth electrical connection portion 7.1 vertically provided at the end end, a fifth electrical connection portion 7.2 inclinedly provided on the side wall away from the end cap body 1, and a second horizontal transition portion 7.3 that transitions between the fourth electrical connection portion 7.1 and the fifth electrical connection portion 7.2 in a horizontal manner.

[0025] The first step transition section 4.3 includes a first transition section 4.3.1 formed by bending the first electrical connection section 4.1 towards the side wall of the end cap body 1 in a horizontal direction, a second transition section 4.3.2 formed by bending the first transition section 4.3.1 in a vertical direction, and a third transition section 4.3.3 formed by bending the second transition section 4.3.2 in a horizontal direction. The end of the third transition section 4.3.3 is connected to the first connection section 4.2.

[0026] The second step transition section 5.3 includes a fourth transition section 5.3.1 formed by bending the second electrical connection section 5.1 towards the side wall of the end cap body 1 in a horizontal direction, a fifth transition section 5.3.2 formed by bending the fourth transition section 5.3.1 in a vertical direction, and a sixth transition section 5.3.3 formed by bending the fifth transition section 5.3.2 in a horizontal direction. The end of the sixth transition section 5.3.3 is connected to the third electrical connection section 5.2.

[0027] One side of cavity 1.1 is provided with a first electrode mounting groove 1.2 that matches the shape of the first conductive sheet 4. The other side of cavity 1.1 is provided with a second electrode mounting groove 1.3 and a third electrode mounting groove 1.4 that match the shapes of the second conductive sheet 5 and the third conductive sheet 7, respectively. The front and rear ends of cavity 1.1 are provided with a first capacitor mounting groove 1.5 and a second capacitor mounting groove 1.6, respectively, corresponding to the first capacitor 2 and the second capacitor 3. The other side of cavity 1.1 is provided with a resistor mounting groove 1.7 that is tilted and provided corresponding to the thermistor 6. The first capacitor mounting groove 1.5, the first electrode mounting groove 1.2, the second capacitor mounting groove 1.6, the third electrode mounting groove 1.4, the resistor mounting groove 1.7, and the second electrode mounting groove 1.3 are connected in sequence.

[0028] The two sides of the end cap body 1 are rounded, and the resistor mounting groove 1.7 is inclined in a direction parallel to the tangent of the rounded arc.

[0029] A bearing seat 8 is provided at the center of the cavity 1.1. A brush seat 9 extending to the side of the first conductive sheet 4 and the third conductive sheet 7 is provided on one side. The brush seats 9 are symmetrically arranged, and a brush 10 is installed on the brush seat 9.

[0030] The brush holder 9 includes a fixing section 9.1 that is fixedly connected to the first electrical connection part 4.1 and the fourth electrical connection part 7.1, and a mounting section 9.2 that extends from the fixing section 9.1 to the side near the bearing housing 8. The brush 10 is mounted at the end of the mounting section 9.2.

[0031] The first electrical connection part 4.1 and the fourth electrical connection part 7.1 are provided with a plurality of connecting protrusions 11, and the fixing section 9.1 is provided with mounting holes 9.3 corresponding to the connecting protrusions 11.

[0032] The lower ends of the first conductive sheet 4, the second conductive sheet 5, and the third conductive sheet 7 are provided with several pins, and the end cap body 1 is provided with several holes corresponding to the pins for fixing the first conductive sheet 4, the second conductive sheet 5, and the third conductive sheet 7.

[0033] The first capacitor 2 and the second capacitor 3 are respectively installed in the first capacitor mounting slot 1.5 and the second capacitor mounting slot 1.6. The thermistor 6 is installed inside the resistor mounting slot 1.7. The first conductive sheet 4, the second conductive sheet 5, and the third conductive sheet 7 are respectively installed in the first conductive sheet mounting slot 1.2, the second conductive sheet mounting slot 1.3, and the third conductive sheet mounting slot 1.4. Simultaneously, the pins are inserted into the sockets, and the first electrical connection part 4.1 is electrically connected to one side of the first capacitor 2 and the second capacitor 3, the second electrical connection part 5.1 is electrically connected to the other side of the first capacitor 2, and the third electrical connection part 7 is electrically connected to the other side of the first capacitor 2. The fourth electrical connection 7.1 is electrically connected to one side of the thermistor 6, the fifth electrical connection 7.2 is electrically connected to the other side of the thermistor 6, and the bearing seat 8 is located at the center of the cavity 1.1. One end of the connecting protrusion 11 is embedded in the mounting hole 9.3, so that the fixed section 9.1 is fixedly connected to the first electrical connection 4.1 and the fourth electrical connection 7.1, so that the brush holder 9 is symmetrically arranged. When the motor temperature is too high, the resistance of the thermistor 6 increases, thereby disconnecting the electrical connection between the second conductive sheet 5 and the third conductive sheet 7.

[0034] 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 with thermal protection function, characterized in that, 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 includes a first capacitor and a second capacitor respectively disposed at the front and rear ends of the cavity; a first conductive sheet electrically connecting one side of the first and second capacitors; a second conductive sheet sequentially disposed at the other side of the first and second capacitors; a thermistor; and a third conductive sheet. The first conductive sheet includes a first electrical connection portion vertically disposed at the first and second capacitors at the beginning and end ends, and a first connecting portion inclinedly disposed on the side wall away from the end cap body. The first electrical connection portion at the beginning end and the first connecting portion are connected by a stepped first step transition portion. The first electrical connection at the end is connected to the first connecting part by a first horizontal transition portion formed by bending the first electrical connection portion horizontally. The second conductive sheet includes a second electrical connection portion vertically disposed at the beginning end, a third electrical connection portion inclinedly disposed on the side wall away from the end cap body, and a second stepped transition portion that transitions between the second electrical connection portion and the third electrical connection portion in a stepped manner. The third conductive sheet includes a fourth electrical connection portion vertically disposed at the end end, a fifth electrical connection portion inclinedly disposed on the side wall away from the end cap body, and a second horizontal transition portion that transitions between the fourth electrical connection portion and the fifth electrical connection portion.

2. The motor end cover with thermal protection function according to claim 1, characterized in that: The first stepped transition portion includes a first transition portion formed by bending the first electrical connection portion towards the side wall of the end cap body in a horizontal direction, a second transition portion formed by bending the first transition portion in a vertical direction, and a third transition portion formed by bending the second transition portion in a horizontal direction, wherein the end of the third transition portion is connected to the first connection portion.

3. The motor end cover with thermal protection function according to claim 1, characterized in that: The second stepped transition portion includes a fourth transition portion formed by bending the second electrical connection portion towards the side wall of the end cap body in a horizontal direction, a fifth transition portion formed by bending the fourth transition portion in a vertical direction, and a sixth transition portion formed by bending the fifth transition portion in a horizontal direction. The end of the sixth transition portion is connected to the third electrical connection portion.

4. The motor end cover with thermal protection function according to claim 1, characterized in that: One side of the cavity is provided with a first electrode mounting groove that matches the shape of the first conductive sheet. The other side of the cavity is provided with a second electrode mounting groove and a third electrode mounting groove that match the shape of the second and third conductive sheets, respectively. The front and rear ends of the cavity are provided with a first capacitor mounting groove and a second capacitor mounting groove, respectively, corresponding to the first capacitor and the second capacitor. The other side of the cavity is provided with a resistor mounting groove that is inclined to the thermistor. The first capacitor mounting groove, the first electrode mounting groove, the second capacitor mounting groove, the third electrode mounting groove, the resistor mounting groove, and the second electrode mounting groove are sequentially connected.

5. A motor end cover with thermal protection function according to claim 4, characterized in that: The two sides of the end cap body are rounded, and the resistor mounting groove is inclined in a direction parallel to the tangent of the rounded arc.

6. A motor end cover with thermal protection function according to claim 4, characterized in that: A bearing seat is provided at the center of the cavity. A brush holder is provided on one side of the first conductive sheet and the third conductive sheet, extending to the side close to the bearing seat. The brush holders are symmetrically arranged, and brushes are installed on the brush holders.

7. A motor end cover with thermal protection function according to claim 6, characterized in that: The brush holder includes a fixed section fixedly connected to a first electrical connection portion and a fourth electrical connection portion, and a mounting section extending from the fixed section to a side near the bearing seat, wherein the brush is mounted at the end of the mounting section.

8. A motor end cover with thermal protection function according to claim 7, characterized in that: The first electrical connection part and the fourth electrical connection part are provided with a plurality of connecting protrusions, and the fixing section is provided with mounting holes corresponding to the connecting protrusions.

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