End cover assembly structure

Abstract

The utility model provides an end cover assembly structure which comprises an end cover body, the end cover body is used in cooperation with an external connection shell, a PCB is installed on the outer side of the top of the end cover body, the PCB is connected with an external power source, and an anti-electromagnetic interference circuit is installed on the PCB. And the PCB is arranged on the outer side of the end cover, so that the space requirement in the motor is further reduced, and the size of the vehicle-mounted motor is smaller. And meanwhile, the anti-electromagnetic interference circuit is arranged on the PCB, so that the EMC level of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor end covers, in particular to an end cover component structure. Background Art

[0002] The market has a high demand for miniaturization of automotive motors. At present, the internal structure design of motors is more compact and the layout is constantly rationalized. Among them, the built-in PCB board is large in size, which has become a bottleneck for further miniaturization of automotive motors.

[0003] The motor will generate electromagnetic radiation during operation, which will affect other electrical components in the car. As people's living standards improve, the time they spend in cars in their daily lives is increasing. At the same time, people are more concerned about the impact of the electromagnetic environment on health. Therefore, higher requirements are placed on the EMC level of vehicle-mounted motors. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an end cover assembly structure with an external PCB board, which can save the internal space of the motor and make the motor more miniaturized. At the same time, an anti-electromagnetic interference circuit is installed on the PCB board to improve the EMC level of the motor.

[0005] The specific technical solution is as follows: an end cover assembly structure, including an end cover body, the end cover body is used in conjunction with an external housing, a PCB board is installed on the outside of the top of the end cover body, the PCB board is connected to an external power supply, and an anti-electromagnetic interference circuit is installed on the PCB board.

[0006] Through the above technical solution, the PCB board is arranged outside the end cover, further reducing the space requirement inside the motor and making the vehicle-mounted motor smaller. At the same time, an anti-electromagnetic interference circuit is installed on the PCB board, improving the EMC level of the motor.

[0007] Preferably, the anti-electromagnetic interference circuit includes a first capacitor, a second capacitor, a third capacitor, a first resistor and a second resistor. The first capacitor is connected in parallel with the first resistor, the second capacitor is connected in series with the third capacitor, a grounding wire is installed on the circuit between the second capacitor and the third capacitor, the second capacitor is connected in series with the third capacitor and then connected in parallel with the first capacitor, the second resistor is connected in series with the motor circuit, and the second resistor is connected in series with the motor circuit and then connected in parallel with the first capacitor.

[0008] Through the above technical solution, the anti-electromagnetic interference effect of the anti-electromagnetic interference circuit is improved.

[0009] Preferably, the PCB board is respectively provided with a power positive electrode slot, a power negative electrode slot, a motor positive electrode slot and a motor negative electrode slot.

[0010] Through the above technical solution, the conductive plug can be connected to the PCB board, making the PCB board more convenient to install and the connection more stable.

[0011] Preferably, the first resistor is a varistor.

[0012] The above technical solution can prevent high voltage surge.

[0013] Preferably, the second resistor is a thermistor.

[0014] The above technical solution can prevent the motor from overheating.

[0015] Preferably, a first inductor and a second inductor are respectively connected in series at both ends of the motor loop, and the first inductor is located between the second resistor and the motor loop.

[0016] Through the above technical solution, noise can be filtered, current can be stabilized and electromagnetic wave interference can be suppressed.

[0017] Preferably, a connecting block is provided on the end cover body.

[0018] Through the above technical solution, the connecting block is used to be connected to the external motor housing.

[0019] Preferably, a positioning block is provided on the end cover body, a spring sheet is installed on the end cover body, the spring sheet is located between the positioning block and the second resistor, and the spring sheet is electrically connected to the positive electrode slot of the motor.

[0020] Through the above technical solution, the contact between the spring sheet and the second resistor is more stable through the cooperation between the positioning block and the spring sheet.

[0021] Preferably, a positive electrode carbon brush holder and a negative electrode carbon brush holder are respectively mounted on the end cover body, wherein the positive electrode carbon brush holder is electrically connected to the second resistor, and the negative electrode carbon brush holder is electrically connected to the negative electrode slot of the motor.

[0022] Through the above technical solution, the positive carbon brush holder and the negative carbon brush holder are connected to the external commutator to supply power to the motor.

[0023] The beneficial effects of the utility model are:

[0024] 1. With an external PCB board, the internal space of the motor can be saved, making the motor more miniaturized;

[0025] 2. Anti-electromagnetic interference circuit is installed on the PCB board to improve the EMC level of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1 It is the front view of Example 1;

[0028] Figure 2 It is a rear view of Example 1;

[0029] Figure 3 is a stereogram of Example 1;

[0030] Figure 4 The anti-electromagnetic interference circuit diagram of Example 1;

[0031] 1. End cover body, 2. PCB board, 21. Power supply positive pole slot, 22. Power supply negative pole slot, 23. Motor positive pole slot, 24. Motor negative pole slot, 3. First capacitor, 4. Second capacitor, 5. Third capacitor, 6. First resistor, 7. Second resistor, 8. First inductor, 9. Second inductor, 10. Ground wire, 11. Connecting block, 12. Positioning block, 13. Shrapnel, 14. Positive carbon brush holder, 15. Negative carbon brush holder. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1

[0035] like Figure 1-4An end cap assembly structure is shown, including an end cap body 1, which is used in conjunction with an external housing. A PCB board 2 is installed on the outer side of the top of the end cap body 1. The use of an external PCB board 2 can save the internal space of the motor and make the motor more miniaturized. The PCB board 2 is connected to an external power supply, and an anti-electromagnetic interference circuit is installed on the PCB board 2. The anti-electromagnetic interference circuit is installed on the PCB board to improve the EMC level of the motor. A buckle 11 is installed on the end cap body 1 for connecting to an external motor housing. A positioning block 12 is installed on the end cap body to play a positioning role when the end cap body is connected to the external motor housing.

[0036] The anti-electromagnetic interference circuit includes a first capacitor 3, a second capacitor 4, a third capacitor 5, a first resistor 6 and a second resistor 7. The first resistor 6 uses a varistor to prevent high-voltage surges. The second resistor 7 uses a thermistor 7 to prevent the motor from overheating. The first capacitor 3 is connected in parallel with the first resistor 6. The second capacitor 4 is connected in series with the third capacitor 5, and a grounding wire 10 is installed on the circuit between the second capacitor 4 and the third capacitor 5. The second capacitor 4 is connected in series with the third capacitor 5 and then connected in parallel with the first capacitor 3. The second resistor 7 is connected in series with the motor circuit, and the second resistor 7 is connected in series with the motor circuit and then connected in parallel with the first capacitor 3. The first inductor 8 and the second inductor 9 are respectively connected in series at both ends of the motor circuit, and the first inductor 8 is located between the second resistor 7 and the motor circuit. The first inductor 8 and the second inductor 9 can filter noise, stabilize current and suppress electromagnetic wave interference.

[0037] When the circuit is running, the current sequentially flows from the positive electrode of the power supply to the second capacitor 4 and then to the ground wire 10 to form a loop; the current sequentially flows from the positive electrode of the power supply to the second resistor 7, the first inductor 8, the motor loop, the second inductor 9, the third capacitor 5 and then to the ground wire 10 to form another loop; the above two loops are in parallel relationship. The above circuit makes the anti-electromagnetic interference circuit have a better anti-electromagnetic interference effect.

[0038] The PCB board 2 is respectively provided with a power positive electrode slot 21, a power negative electrode slot 22, a motor positive electrode slot 23 and a motor negative electrode slot 24. It can be connected to the PCB board through a conductive plug, making the PCB board installation more convenient and the connection more stable.

[0039] The end cover body 1 is provided with a connection block 11. The motor housing is provided with a clamping device, which is clamped with the connection block for connecting the end cover body with the external motor housing.

[0040] The end cover body 1 is provided with a positioning block 12, and a spring 13 is installed on the end cover body 1. The spring 13 is located between the positioning block 12 and the thermistor 7, and the spring 13 is electrically connected to the motor positive electrode slot 23. The positioning block 12 and the spring 13 cooperate to make the contact between the spring 13 and the second resistor 7 more stable.

[0041] The end cover body 1 is respectively provided with a positive carbon brush holder 14 and a negative carbon brush holder 15. The positive carbon brush holder is electrically connected to the second resistor 7, and the negative carbon brush holder 15 is electrically connected to the negative slot of the motor. The positive carbon brush holder 14 and the negative carbon brush holder 15 are connected to an external commutator to supply power to the motor.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An end cap assembly structure, characterized in that: The invention comprises an end cover body (1), the end cover body (1) is used in conjunction with an external housing, a PCB board (2) is installed on the outer side of the top of the end cover body (1), the PCB board (2) is connected to an external power supply, and an anti-electromagnetic interference circuit is installed on the PCB board (2).

2. The end cap assembly structure according to claim 1, characterized in that: The anti-electromagnetic interference circuit comprises a first capacitor (3), a second capacitor (4), a third capacitor (5), a first resistor (6) and a second resistor (7); the first capacitor (3) is connected in parallel with the first resistor (6); the second capacitor (4) is connected in series with the third capacitor (5); a grounding wire (10) is installed on the circuit between the second capacitor (4) and the third capacitor (5); the second capacitor (4) is connected in series with the third capacitor (5) and then connected in parallel with the first capacitor (3); the second resistor (7) is connected in series with the motor circuit; the second resistor (7) is connected in series with the motor circuit and then connected in parallel with the first capacitor (3).

3. The end cap assembly structure according to claim 1, characterized in that: The PCB board (2) is respectively provided with a power supply positive electrode slot (21), a power supply negative electrode slot (22), a motor positive electrode slot (23) and a motor negative electrode slot (24).

4. The end cap assembly structure according to claim 2, characterized in that: The first resistor (6) is a varistor.

5. The end cap assembly structure according to claim 2, characterized in that: The second resistor (7) is a thermistor.

6. The end cap assembly structure according to claim 2, characterized in that: A first inductor (8) and a second inductor (9) are respectively connected in series at both ends of the motor loop, and the first inductor (8) is located between the second resistor (7) and the motor loop.

7. The end cap assembly structure according to claim 1, characterized in that: A connecting block (11) is provided on the end cover body (1).

8. The end cap assembly structure according to claim 3, characterized in that: The end cover body (1) is provided with a positioning block (12), the end cover body (1) is provided with a spring sheet (13), the spring sheet (13) is located between the positioning block (12) and the second resistor (7), and the spring sheet (13) is electrically connected to the motor positive electrode slot (23).

9. The end cap assembly structure according to claim 3, characterized in that: A positive electrode carbon brush holder (14) and a negative electrode carbon brush holder (15) are respectively mounted on the end cover body (1); the positive electrode carbon brush holder (14) is electrically connected to the second resistor (7); and the negative electrode carbon brush holder (15) is electrically connected to the negative electrode slot (24) of the motor.

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