Permanent magnet direct current brush motor with improved wire buckle structure

Abstract

The utility model discloses a permanent magnet direct current brush motor with an improved wire buckle structure, which comprises a motor shell, the other end of the motor shell is fixedly connected with a motor rear cover through a screw, one side of the motor rear cover is fixedly connected with a motor switch line, one end of the motor switch line is fixedly connected with a lead, and the other end of the motor switch line is fixedly connected with a wire. An electric brush is fixedly installed on the inner wall of the motor rear cover, an electric brush wire is fixedly installed on one side of the electric brush, a commutator is movably connected to one end of the electric brush, a rotating shaft is fixedly connected to the center of the commutator, and a rotor is fixedly connected to the middle of the rotating shaft. The permanent magnet direct current brush motor with the improved wire buckle structure solves the problem that the brush wire of a common permanent magnet direct current brush motor is easy to be welded poorly or a screw is easy to loosen when the brush wire is installed, and the permanent magnet direct current brush motor with the improved wire buckle structure is simple in structure and convenient to use. And the stability and the reliability of electrical connection are ensured.

Description

Technical Field

[0001] This utility model relates to the field of brushed motor technology, specifically a permanent magnet DC brushed motor with an improved wire buckle structure. Background Technology

[0002] Permanent magnet brushed DC motors are a common type of electric motor, widely used in various industrial, household, and automotive electronic devices. Their working principle relies on the contact between the brushes and the commutator to introduce current into the rotor, thereby driving the motor to rotate. However, in existing technology, the brush leads of permanent magnet brushed DC motors are mostly connected by welding the wires together in pairs or by screw locking.

[0003] While these connection methods can meet the needs of motor use to some extent, they also have significant drawbacks. First, while butt-welding the wires provides a high connection strength, it is prone to poor welding, such as incomplete soldering or detachment. This can lead to unstable electrical connections during motor operation and even cause malfunctions. Second, using screws for connection is relatively simple, but screws are prone to loosening under long-term vibration or temperature changes, affecting the stability of the electrical connection and posing a safety hazard.

[0004] Furthermore, these traditional connection methods suffer from low installation efficiency and high maintenance costs. Welding and screw tightening require specific skills and tools, increasing both installation difficulty and maintenance costs. Additionally, during maintenance, if wires or brushes need to be replaced, these connection methods also increase the difficulty of disassembly and reconnection. Utility Model Content

[0005] The purpose of this invention is to provide a permanent magnet DC brushed motor with an improved wire buckle structure to solve the problems of brushed motors mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a permanent magnet DC brushed motor with an improved wire buckle structure, comprising a motor housing, a front cover of the motor housing fixedly mounted on one end by screws, and a rear cover of the motor housing fixedly connected to the other end by screws. A motor switch wire is fixedly connected to one side of the rear cover, and a wire is fixedly connected to one end of the motor switch wire. A brush is fixedly mounted on the inner wall of the rear cover, and a brush wire is fixedly mounted on one side of the brush. A commutator is movably connected to one end of the brush. A rotating shaft is fixedly connected to the center of the commutator, and a rotor is fixedly connected to the middle of the rotating shaft. A permanent magnet is fixedly connected to the inner wall of the motor housing, and a snap-fit ​​device for quick connection between the wire and the brush wire is provided.

[0007] Preferably, four brushes are provided, and brush wires are fixedly connected to one side of each of the four wire ends. Adjacent wire ends are connected in series by wires, and each of the four brush wires and wires has a snap-fit ​​device at the interface.

[0008] Preferably, a circular hole is provided at the center of the motor front cover, and one end of the rotating shaft extends to the outside of the motor front cover through the circular hole.

[0009] Preferably, four permanent magnets are provided, and the four permanent magnets are arranged in a cross shape on the inner wall of the motor housing, with the rotor located between the four permanent magnets.

[0010] Preferably, each of the four snap-fit ​​devices includes a brush wire cover, a limiting ring, a sleeve cover, and a snap-fit ​​groove. One end of the brush wire is fixedly connected to the brush wire cover, the bottom end of the brush wire cover is fixedly connected to the limiting ring, and the outer surface of the brush wire cover is movably connected to the sleeve cover, with a snap-fit ​​groove formed on the inner wall of the sleeve cover.

[0011] Preferably, the wire is divided into two parts: a core and a casing. One end of the core is fixedly connected to a wire head, and one end of the wire head is movably connected to the inside of the brush cover. Two clips are fixedly connected to the surface of the casing, and the surface of the casing is movably connected to the inside of the cover.

[0012] Preferably, the top of the cover has a rotating hole, and the outer surface of the brush wire cover is movably connected to the interior of the rotating hole in the cover, and the diameter of the rotating hole in the cover is smaller than the diameter of the limiting ring.

[0013] Preferably, there are two card slots, both of which are L-shaped and are located on the inner wall of the cover. One end of each of the two card blocks is movably connected to the inside of the two card slots.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Through the set snap-fit ​​device, a quick and stable connection can be achieved between the wire and the brush wire. The snap-fit ​​device includes a brush wire cover, a limiting ring, a sleeve cover, and a slot. This design not only simplifies the connection process, but also effectively prevents the connection from falling off through the L-shaped structure of the snap-fit ​​block and the slot, ensuring the stability and reliability of the electrical connection.

[0016] 2. The design of the brush wire cover and the wire end makes the connection and disconnection between the wire and the brush wire simple and quick, which greatly facilitates the maintenance and replacement of the motor. When it is necessary to replace the wire or brush, it can be easily completed without complicated disassembly. Attached Figure Description

[0017] Figure 1This is an overall view of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is an internal view of the motor rear cover of this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a cross-sectional view of the snap-fit ​​device of this utility model.

[0022] In the diagram: 1. Motor housing; 2. Motor front cover; 3. Motor rear cover; 4. Motor switch wire; 5. Wire; 6. Brush; 7. Brush wire; 8. Commutator; 9. Shaft; 10. Rotor; 11. Permanent magnet; 12. Brush wire cover; 13. Limit ring; 14. Cover; 15. Slot; 16. Wire end; 17. Locking block. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please see Figure 1-5 This utility model provides a permanent magnet DC brushed motor with an improved wire buckle structure, including a motor housing 1. One end of the motor housing 1 is fixedly mounted with a motor front cover 2 by screws, and the other end of the motor housing 1 is fixedly connected with a motor rear cover 3 by screws. A motor switch wire 4 is fixedly connected to one side of the motor rear cover 3, and a wire 5 is fixedly connected to one end of each motor switch wire 4. A brush 6 is fixedly mounted on the inner wall of the motor rear cover 3, and a brush wire 7 is fixedly mounted on one side of the brush 6. A commutator 8 is movably connected to one end of the brush 6. A rotating shaft 9 is fixedly connected to the center of the commutator 8, and a rotor 10 is fixedly connected to the middle of the rotating shaft 9. A permanent magnet 11 is fixedly connected to the inner wall of the motor housing 1, and a snap-fit ​​device is provided between the wire 5 and the brush wire 7 for quick connection.

[0025] Furthermore, there are four brushes 6, and brush wires 7 are fixedly connected to one side of each of the four wire heads 16. Adjacent wire heads 16 are connected in series by wires 5, and each of the four brush wires 7 and wires 5 has a snap-fit ​​device at the interface.

[0026] Furthermore, a circular hole is provided at the center of the motor front cover 2, and one end of the rotating shaft 9 extends to the outside of the motor front cover 2 through the circular hole.

[0027] Furthermore, four permanent magnets 11 are provided, and the four permanent magnets 11 are arranged in a cross shape on the inner wall of the motor housing 1, and the rotor 10 is located between the four permanent magnets 11.

[0028] Furthermore, each of the four snap-fit ​​devices includes a brush wire cover 12, a limiting ring 13, a sleeve cover 14, and a slot 15. One end of the brush wire 7 is fixedly connected to the brush wire cover 12, the bottom end of the brush wire cover 12 is fixedly connected to the limiting ring 13, and the outer surface of the brush wire cover 12 is movably connected to the sleeve cover 14. The inner wall of the sleeve cover 14 is provided with a slot 15.

[0029] Furthermore, the wire 5 is divided into two parts: the battery core and the wire shell. One end of the battery core of the wire 5 is fixedly connected to the wire head 16, and one end of the wire head 16 is movably connected to the inside of the brush wire cover 12. Two clips 17 are fixedly connected to the surface of the wire shell of the wire 5, and the surface of the wire shell of the wire 5 is movably connected to the inside of the cover 14.

[0030] Furthermore, the top of the cover 14 is provided with a rotating hole, and the outer surface of the brush wire cover 12 is movably connected to the interior of the rotating hole in the cover 14, and the diameter of the rotating hole in the cover 14 is smaller than the diameter of the limiting ring 13.

[0031] Furthermore, there are two slots 15, both of which are L-shaped and are located on the inner wall of the cover 14. One end of each of the two card blocks 17 is movably connected to the inside of the two slots 15.

[0032] In use, when the motor needs to operate, the brush wire cover 12, which is fixedly connected to one end of the brush wire 7, is first installed on the wire head 16, so that one end of the wire head 16 is inserted into the inside of the brush wire cover 12. This causes the bottom of the limiting ring 13 to press the insulating spring through the protective ring, and the bottom end of the insulating spring is fixed to the top of the wire 5, thus connecting the wire 5 and the brush wire 7. Then, as the wire head 16 is inserted into the inside of the brush wire cover 12, the wire 5 enters the inside of the cover 14, thereby driving the two locking blocks 17 fixedly connected to the outer shell of the wire 5 to enter the two locking slots 15 opened in the inner wall of the cover 14, and the two locking blocks 17 respectively reach the L-shaped corners of the two locking slots 15. When the cover 14 is rotated, the two locking blocks 17 are respectively inserted into the transverse grooves of the two locking slots 15. After reaching one end of the transverse groove of the locking slot 15, the cover 14 is released. Under the elastic force of the insulating spring, the wire 5 slides downward with the locking block 17, so that the locking block 17 enters the locking groove, preventing the wire 5 from moving up and down inside the cover 14. This prevents the brush wire cover 12 and the wire head 16 from falling off, resulting in poor contact between them. Then, when the external DC power supply is connected to the brush 6 through the motor switch wire 4 and the wire 5, the brush 6 contacts the commutator 8, thereby introducing current into the rotor 10. When the current passes through the rotor 10, the rotor 10 generates a magnetic field. This magnetic field interacts with the magnetic field generated by the permanent magnet 11, causing the rotor 10 to be subjected to an electromagnetic force and begin to rotate, thereby driving the shaft 9 to rotate, thus completing the operation of the motor.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A permanent magnet DC brushed motor with an improved wire-clamp structure, comprising a motor housing (1), characterized in that: One end of the motor housing (1) is fixedly mounted with a motor front cover (2) by screws, and the other end of the motor housing (1) is fixedly connected with a motor rear cover (3) by screws. A motor switch wire (4) is fixedly connected to one side of the motor rear cover (3), and a wire (5) is fixedly connected to one end of the motor switch wire (4). A brush (6) is fixedly mounted on the inner wall of the motor rear cover (3), and a brush wire (7) is fixedly mounted on one side of the brush (6). A commutator (8) is movably connected to one end of the brush (6), and a rotating shaft (9) is fixedly connected to the center of the commutator (8). A rotor (10) is fixedly connected to the middle of the rotating shaft (9). A permanent magnet (11) is fixedly connected to the inner wall of the motor housing (1), and a quick-connect snap-fit ​​device is provided between the wire (5) and the brush wire (7).

2. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 1, characterized in that: The brush (6) is provided in four parts, and brush wire (7) is fixedly connected to one side of each of the four wire heads (16). The two adjacent wire heads (16) are connected in series by wire (5), and the interface between the four brush wires (7) and the wire (5) is provided with a snap-fit ​​device.

3. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 1, characterized in that: A circular hole is provided at the center of the motor front cover (2), and one end of the rotating shaft (9) extends through the circular hole to the outside of the motor front cover (2).

4. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 1, characterized in that: The permanent magnets (11) are provided in four parts, and the four permanent magnets (11) are arranged in a cross shape on the inner wall of the motor housing (1), and the rotor (10) is located between the four permanent magnets (11).

5. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 2, characterized in that: Each of the four snap-fit ​​devices includes a brush wire cover (12), a limiting ring (13), a sleeve cover (14), and a slot (15). One end of the brush wire (7) is fixedly connected to the brush wire cover (12), the bottom end of the brush wire cover (12) is fixedly connected to the limiting ring (13), and the outer surface of the brush wire cover (12) is movably connected to the sleeve cover (14). The inner wall of the sleeve cover (14) is provided with a slot (15).

6. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 5, characterized in that: The wire (5) is divided into two parts: the core and the outer shell. One end of the core of the wire (5) is fixedly connected to the wire head (16), and one end of the wire head (16) is movably connected to the inside of the brush wire cover (12). Two clips (17) are fixedly connected to the surface of the outer shell of the wire (5), and the outer surface of the outer shell of the wire (5) is movably connected to the inside of the cover (14).

7. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 5, characterized in that: The top of the cover (14) has a rotating hole, and the outer surface of the brush wire cover (12) is movably connected to the inside of the rotating hole in the cover (14), and the diameter of the rotating hole in the cover (14) is smaller than the diameter of the limiting ring (13).

8. A permanent magnet DC brushed motor with an improved wire-clamp structure according to claim 7, characterized in that: There are two slots (15), both slots (15) are L-shaped, and both slots (15) are opened on the inner wall of the cover (14), and one end of each of the two blocks (17) is movably connected to the inside of the two slots (15).

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