Rear cover assembly of miniature direct-current motor

Abstract

The utility model relates to a rear cover assembly of a miniature direct-current motor. In order to solve the problem, the utility model provides the rear cover assembly of the miniature direct-current motor. According to the technical scheme, the motor comprises a motor rotor, an iron core assembly, a motor shell and a motor rear cover assembly, the motor rear cover assembly comprises a motor rear cover, an external terminal seat, terminal pins and a terminal seat locking plate, the motor rear cover comprises a rear cover body and a rear cover edge, a cover body butt joint seat is arranged on the rear cover body, and the terminal pins are inserted into the terminal seat locking plate. A butt-joint seat limiting groove is formed in the cover body butt-joint seat, and a butt-joint seat receding hole is formed in the bottom of the butt-joint seat limiting groove. The utility model has the advantages that the terminal seat locking plate sequentially penetrates through the butt joint seat locking opening and the terminal seat locking hole, so that the external terminal seat, the terminal pin and the cover body butt joint seat form a whole, and the problem that the external terminal seat and the terminal pin are loosened due to vibration or plugging in the traditional design is effectively solved; and the stability and reliability of wiring are improved.

Description

Technical Field

[0001] This utility model relates to a rear cover assembly for a miniature DC motor. Background Technology

[0002] A miniature DC motor includes a motor rotor, an iron core assembly sleeved on the motor rotor, a motor housing covering the iron core assembly, and a motor rear cover assembly fixed to the end of the motor housing. Existing motor rear cover assemblies incorporate external terminal blocks for convenient wiring of the internal iron core assembly, making connection easier and faster. However, due to vibrations from the rotating motor rotor and frequent plugging and unplugging, the external terminal blocks and terminal pins can easily become loose, leading to poor wiring contact and unstable signal transmission. The fixing method of the external terminal blocks is relatively simple, usually relying on a single snap-fit ​​connection. In complex environments (such as vibration or impact), the external terminal blocks are prone to detaching from the motor rear cover, resulting in poor stability and reliability. Therefore, improvements and optimizations are proposed to address these issues. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a miniature DC motor rear cover assembly.

[0004] The technical solution adopted by the micro DC motor rear cover assembly of this utility model is as follows: It includes a motor rotor, an iron core assembly sleeved on the motor rotor, a motor housing covering the iron core assembly, and a motor rear cover assembly fixed to the end of the motor housing. The motor rear cover assembly is characterized by including a motor rear cover, an external terminal block, terminal pins spaced through the external terminal block and connected to the output end of the iron core assembly, and a terminal block locking plate. The motor rear cover includes a rear cover body and a rear cover edge. The rear cover body is provided with a cover body docking seat. The cover body docking seat is provided with a docking seat limiting groove for the external terminal block to be inserted. The bottom of the docking seat limiting groove is provided with a docking seat clearance hole for the terminal pins to pass through.

[0005] The front end face of the external terminal block is provided with a terminal block slot, the terminal block slot is provided with a pin insertion hole, the upper end face of the external terminal block is provided with a terminal block locking hole, the outer wall of the cover docking seat is provided with a docking seat locking opening, and the terminal block locking plate is sequentially inserted into the docking seat locking opening and the terminal block locking hole.

[0006] The terminal block locking plate is provided with a locking plate fixing hole, and the rear cover is provided with a cover threaded hole outside the cover docking seat. The locking plate fixing hole and the cover threaded hole are connected by screws.

[0007] The terminal block locking plate includes a locking plate connecting part, locking plate pins spaced apart on the locking plate connecting part, and a locking plate reinforcing part. The locking plate reinforcing part is provided with a locking plate fixing hole. The bottom of the external terminal block is provided with a pin through hole for the locking plate pins to pass through and communicating with the terminal block locking hole. The inner wall of the mating seat limiting groove is provided with a pin limiting opening communicating with the mating seat locking opening and for limiting the end of the locking plate pins. The locking plate connecting part passes through the mating seat locking opening and is placed in the terminal block locking hole. The locking plate pins pass through the pin through hole and are placed in the pin limiting opening.

[0008] The terminal pin includes a pin body that passes through the pin through hole. The pin body is bent vertically in sequence to form a pin mounting part and a pin wiring part that is connected to the output end of the iron core assembly. The rear end face of the external terminal block is provided with a terminal block rear limiting groove for limiting the pin mounting part.

[0009] The external terminal block is provided with terminal block slots on the left and right sides, and the inner wall of the mating seat limiting groove is provided with a mating seat block that mates with the terminal block slots.

[0010] The pin connector is provided with a pin winding hole for easy winding.

[0011] The advantages of this utility model of micro DC motor rear cover assembly are as follows: the terminal block locking plate is sequentially provided with the docking seat locking opening and the terminal block locking hole, so that the external terminal block, terminal pin and cover docking seat form a whole, which effectively solves the problem of loosening of external terminal block and terminal pin due to vibration or insertion and removal in traditional design, and improves the stability of wiring and the reliability of signal transmission. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of the micro DC motor rear cover assembly of this utility model;

[0014] Figure 2 This is an exploded view of the motor rear cover assembly of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the motor rear cover of this utility model;

[0016] Figure 4 This is a front structural diagram of the external terminal block of this utility model;

[0017] Figure 5 This is a schematic diagram of the back structure of the external terminal block of this utility model;

[0018] Figure 6This is a schematic diagram of the terminal block locking plate of this utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the terminal pin of this utility model. Detailed Implementation

[0020] like Figure 1-7 As shown, the miniature DC motor rear cover assembly of this utility model includes a motor rotor 1, an iron core assembly 2 sleeved on the motor rotor 1, a motor housing 3 covering the iron core assembly 2, and a motor rear cover assembly 4 fixed to the end of the motor housing 3. The motor rear cover assembly 4 includes a motor rear cover 6, an external terminal block 7, terminal pins 8 spaced through the external terminal block 7 and connected to the output end of the iron core assembly 2, and a terminal block locking plate 9. The motor rear cover 6 includes a rear cover body 11 and a rear cover edge 12. The rear cover body 11 is provided with a cover body mating part. The cover docking seat 13 has a docking seat limiting groove 14 for inserting the external terminal block 7, and a docking seat clearance hole 15 for the terminal pin 8 to pass through at the bottom of the docking seat limiting groove 14. The front end face of the external terminal block 7 has a terminal block matching slot 16, and a pin insertion hole 17 is provided in the terminal block matching slot 16. The upper end face of the external terminal block 7 has a terminal block locking hole 18. The outer wall of the cover docking seat 13 has a docking seat locking opening 20. The terminal block locking plate 9 is sequentially inserted into the docking seat locking opening 20 and the terminal block locking hole 18.

[0021] The terminal block locking plate 9 is provided with a locking plate fixing hole 21, and the rear cover 11 is provided with a cover threaded hole 22 outside the cover docking seat 13. The locking plate fixing hole 21 and the cover threaded hole 22 are connected by screws, realizing the double locking of the external terminal block 7, making the fixation more reliable and improving stability and reliability.

[0022] The terminal block locking plate 9 includes a locking plate connecting part 24, locking plate pins 25 spaced apart on the locking plate connecting part 24, and a locking plate reinforcing part 26. The locking plate reinforcing part 26 is provided with a locking plate fixing hole 21. The bottom of the external terminal block 7 is provided with a pin through hole 19 for the locking plate pins 25 to pass through and communicating with the terminal block locking hole 18. The inner wall of the docking seat limiting groove 14 is provided with a pin limiting opening 28 communicating with the docking seat locking opening 20 and used to limit the end of the locking plate pins 25. The locking plate connecting part 24 passes through the docking seat locking opening 20 and is placed in the terminal block locking hole 18. The locking plate pins 25 pass through the pin through hole 19 and are placed in the pin limiting opening 28.

[0023] The terminal pin 8 includes a pin body 30 that passes through the pin through hole 17. The pin body 30 is bent vertically in sequence to form a pin mounting part 31 and a pin wiring part 32 that is connected to the output end of the iron core assembly 2. The rear end face of the external terminal block 7 is provided with a terminal block rear limiting groove 34 for limiting the pin mounting part 31, which reduces wiring failure caused by loosening or displacement of the terminal pin 8 and improves overall reliability and safety.

[0024] The external terminal block 7 is provided with terminal block slots 36 on the left and right sides, and the inner wall of the docking seat limiting groove 14 is provided with docking seat blocks 37 that dock with the terminal block slots 36. When subjected to external force, the mechanical strength of the motor rear cover assembly is significantly improved, reducing damage caused by accidental impact or improper operation.

[0025] The pin connector 32 is provided with a pin winding hole 38 for easy winding, which reduces wiring time, improves assembly efficiency, and reduces the risk of operational errors.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A miniature DC motor rear cover assembly, comprising a motor rotor (1), an iron core assembly (2) sleeved on the motor rotor (1), a motor housing (3) covering the iron core assembly (2), and a motor rear cover assembly (4) fixed to the end of the motor housing (3), characterized in that: The motor rear cover assembly (4) includes a motor rear cover (6), an external terminal block (7), terminal pins (8) spaced through the external terminal block (7) and connected to the output end of the iron core assembly (2), and a terminal block locking plate (9). The motor rear cover (6) includes a rear cover body (11) and a rear cover edge (12). The rear cover body (11) is provided with a cover body docking seat (13). The cover body docking seat (13) is provided with a docking seat limiting groove (14) for the external terminal block (7) to be inserted. The bottom of the docking seat limiting groove (14) is provided with a docking seat clearance hole (15) for the terminal pins (8) to pass through. The front end face of the external terminal block (7) is provided with a terminal block slot (16), the terminal block slot (16) is provided with a pin insertion hole (17), the upper end face of the external terminal block (7) is provided with a terminal block locking hole (18), the outer wall of the cover docking seat (13) is provided with a docking seat locking opening (20), and the terminal block locking plate (9) is sequentially inserted into the docking seat locking opening (20) and the terminal block locking hole (18).

2. The miniature DC motor rear cover assembly according to claim 1, characterized in that: The terminal block locking plate (9) is provided with a locking plate fixing hole (21), and the rear cover (11) is provided with a cover thread hole (22) outside the cover docking seat (13). The locking plate fixing hole (21) and the cover thread hole (22) are connected by screws.

3. The miniature DC motor rear cover assembly according to claim 1, characterized in that: The terminal block locking plate (9) includes a locking plate connecting part (24), locking plate pins (25) spaced apart on the locking plate connecting part (24), and a locking plate reinforcing part (26). The locking plate reinforcing part (26) is provided with the locking plate fixing hole (21). The bottom of the external terminal block (7) is provided with a pin through hole (19) for the locking plate pins (25) to pass through and communicating with the terminal block locking hole (18). The inner wall of the docking seat limiting groove (14) is provided with a pin limiting port (28) communicating with the docking seat locking opening (20) and used to limit the end of the locking plate pins (25). The locking plate connecting part (24) passes through the docking seat locking opening (20) and is placed in the terminal block locking hole (18). The locking plate pins (25) pass through the pin through hole (19) and are placed in the pin limiting port (28).

4. The micro DC motor rear cover assembly according to claim 1, characterized in that: The terminal pin (8) includes a pin body (30) that passes through the pin through hole (17). The pin body (30) is bent vertically in sequence to form a pin mounting part (31) and a pin wiring part (32) that is connected to the output end of the iron core assembly (2). The rear end face of the external terminal block (7) is provided with a terminal block rear limiting groove (34) for limiting the pin mounting part (31).

5. The micro DC motor rear cover assembly according to claim 1, characterized in that: The external terminal block (7) is provided with terminal block slots (36) on the left and right sides, and the inner wall of the docking seat limiting groove (14) is provided with docking seat blocks (37) that dock with the terminal block slots (36).

6. The miniature DC motor rear cover assembly according to claim 3, characterized in that: The pin connector (32) is provided with a pin winding hole (38) for easy winding.

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