A micro DC motor's foam damping strip structure

Abstract

The utility model relates to the technical field of motor, especially micro DC motor's foam damping strip structure, it includes motor end cover, sets up the brush piece on the motor end cover, is provided with the mounting block on the end cover, the one side side edge both ends of mounting block all are provided with the lug, one end of brush piece is connected in the lug, the other end of brush piece extends to between two the lugs, the brush piece and the mounting block between are inclined settings, the surface of mounting block is provided with the damping strip to the brush piece. The utility model has the effect that reduces the bounce of brush piece, improves the life of brush piece.

Description

Technical Field

[0001] This utility model relates to the technical field of motors, and in particular to a foam damping strip structure for a micro DC motor. Background Technology

[0002] A motor, also known as an electric motor, is a device that converts electrical energy into mechanical energy. Simply put, it uses the principle of electromagnetic induction to drive internal components to rotate or move linearly through the magnetic field generated by an electric current, thereby outputting power.

[0003] Most micro DC brushed motors on the market currently have brushes inside. When the motor is working, the brushes bounce, which makes the contact between the brush and the motor's commutator unstable, frequently generating electrical sparks. These sparks corrode the brushes, making the brush surface rougher and accelerating the wear of the brushes. When the brushes break, the motor needs to be scrapped and replaced, resulting in high operating costs. Utility Model Content

[0004] To reduce brush bounce, this invention provides a foam damping strip structure for a micro DC motor, addressing the problems in existing technologies.

[0005] This utility model provides a foam damping strip structure for a micro DC motor, which adopts the following technical solution:

[0006] A foam damping strip structure for a micro DC motor includes a motor end cover and a brush plate disposed on the motor end cover. A mounting block is disposed on the end cover. Both ends of one side of the mounting block are provided with protrusions. One end of the brush plate is connected to the protrusions, and the other end of the brush plate extends between the two protrusions. The brush plate and the mounting block are inclinedly disposed. A damping strip is disposed on the surface of the brush plate facing the mounting block.

[0007] Preferably, the motor end cover is provided with a fixing block and a fixing hole. One end of the fixing block is fixedly inserted into the fixing hole. A positioning block is provided on the surface of the fixing block facing the protrusion. One end of the brush is provided with a positioning hole. The positioning block is inserted into the positioning block. The fixing block and the protrusion are respectively attached to the opposite two side surfaces of the brush.

[0008] Preferably, the protrusion is provided with a receiving groove facing the side wall of the fixing block, and the positioning block is located in the receiving groove.

[0009] Preferably, an adhesive layer is provided between the damping strip and the brush plate.

[0010] Preferably, the brush blade is provided with a plurality of threaded posts, the damping strip is provided with a fixing plate, the fixing plate is in contact with the brush blade, the fixing plate and the damping strip are provided with a plurality of openings, the threaded posts extend into the openings, and a nut is threadedly connected to the threaded post, the nut abutting against the fixing plate.

[0011] Preferably, the fixing piece is made of a flexible material.

[0012] Preferably, the brush blade has a slot at the portion located between the two protrusions, and the slot is provided along the length direction of the brush blade.

[0013] In summary, the present invention includes at least one of the following beneficial technical effects of the foam damping strip structure for a micro DC motor:

[0014] When the motor is working, the damping strip acts as a buffer when the brush blades bounce, absorbing the energy of the brush blades bouncing, thereby reducing the amplitude of the brush blade bounce, reducing the generation of electrical sparks, and thus improving the life of the brush blades. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0016] Figure 2 This is an exploded view of Embodiment 1 of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the fixing block and the brush in Embodiment 1 of this utility model.

[0018] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0019] Figure 5 This is an exploded view of Embodiment 2 of the present invention.

[0020] In the diagram: 1. Motor end cover; 11. Mounting block; 12. Protrusion; 121. Receiving groove;

[0021] 13. Fixing block; 131. Positioning block; 14. Fixing hole; 2. Brush blade; 21. Threaded post;

[0022] 22. Nut; 23. Groove; 3. Damping strip; 31. Hole; Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Example 1: Example 1 of this utility model discloses a foam damping strip structure for a micro DC motor, such as... Figure 1-3 As shown, the device includes a motor end cover 1 and a brush 2 mounted on the motor end cover 1. A mounting block 11 is integrally formed on one side surface of the end cover. Both ends of one side of the mounting block 11 are integrally formed with protrusions 12. The brush 2 is bent and made of elastic material. One end of the brush 2 is fixedly connected to the protrusion 12, and the other end of the brush 2 is located between the two protrusions 12. The part of the brush 2 located between the two protrusions 12 has a slot 23. The slot 23 is set along the length direction of the brush 2. The slot 23 can increase the elastic deformation capability of the brush 2, adapt to the slight unevenness of the commutator surface, and reduce friction vibration and spark generation. Meanwhile, the brush 2 and the mounting block 11 are inclined together. A damping strip 3 is provided on the surface of the brush 2 facing the mounting block 11. The damping strip 3 is made of foam. An adhesive layer is provided between the damping strip 3 and the brush 2. The adhesive layer can fix the damping strip 3 to the brush 2. After the commutator is installed on the motor end cover 1, the brush 2 abuts against the commutator. The commutator squeezes the brush 2, causing the brush 2 to bend further, so that the damping strip 3 abuts against the side wall of the mounting block 11. In this way, when the motor is working, when the brush 2 jumps, the damping strip 3 plays a buffering role, absorbing the energy of the brush 2 jumping, thereby reducing the jumping amplitude of the brush 2, reducing the generation of electric sparks, and thus improving the life of the brush 2.

[0026] In addition, two fixing holes 14 are provided on one side surface of the motor end cover 1. The two fixing holes 14 are located on opposite sides of the two protrusions 12. Fixing blocks 13 are provided on the fixing holes 14. One end of the fixing block 13 is engaged with the fixing hole 14. A positioning block 131 is integrally formed on the surface of the fixing block 13 facing the protrusion 12. A positioning hole is provided on the end of the brush 2 away from the damping strip 3. The positioning block 131 is inserted into the positioning block 131. The fixing block 13 and the protrusion 12 are respectively attached to the opposite two sides of the brush 2. When assembling, the operator inserts the positioning block 131 into the positioning hole on the brush 2, and then inserts the fixing block 13 into the fixing hole 14. The fixing block 13 and the protrusion 12 press the brush 2 together, thereby fixing the brush 2. In addition, the protrusion 12 has a receiving groove 121 on the side wall facing the fixing block 13, and the positioning block 131 is located in the receiving groove 121. The receiving groove 121 can accommodate the positioning block 131.

[0027] The implementation principle of the foam damping strip structure of a micro DC motor in this embodiment of the utility model is as follows: After the commutator is installed on the motor end cover 1, the brush 2 abuts against the commutator, and the commutator squeezes the brush 2 to make the brush 2 bend further, so that the damping strip 3 abuts against the side wall of the mounting block 11. In this way, when the motor is working, when the brush 2 jumps, the damping strip 3 plays a buffering role, absorbs the energy of the brush 2 jumping, thereby reducing the jumping amplitude of the brush 2, reducing the generation of electric sparks, and thus improving the life of the brush 2.

[0028] Example 2: The difference from Example 1 is that, referring to... Figure 4 and Figure 5 Multiple threaded posts 21 are integrally formed on the side of the brush blade 2 facing the mounting block 11. A fixing plate is provided on the damping strip 3. During the manufacturing of the damping strip 3, it can be directly manufactured onto the fixing plate and then cut. The fixing plate fits snugly against the brush blade 2. Multiple openings 31 are provided on both the fixing plate and the damping strip 3. The threaded posts 21 extend into the openings 31, and nuts 22 are threaded onto the threaded posts 21. The nuts 22 abut against the fixing plate, and the fixing plate and threaded posts 21 are connected by the nuts 22. This securely fixes the damping strip 3 to the brush blade 2, preventing it from falling off and ensuring greater safety. Furthermore, the fixing plate is made of a flexible material, allowing it to better adapt to the elastic deformation of the brush blade 2.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A foam damping strip structure for a micro DC motor, characterized in that: Includes a motor end cover (1) and a brush (2) disposed on the motor end cover (1). The end cover is provided with a mounting block (11). Both ends of one side of the mounting block (11) are provided with protrusions (12). One end of the brush (2) is connected to the protrusion (12), and the other end of the brush (2) extends between the two protrusions (12). The brush (2) and the mounting block (11) are inclined together. A damping strip (3) is provided on the surface of the brush (2) facing the mounting block (11).

2. The foam damping strip structure for a micro DC motor according to claim 1, characterized in that: The motor end cap (1) is provided with a fixing block (13) and a fixing hole (14). One end of the fixing block (13) is engaged with the fixing hole (14). The fixing block (13) has a positioning block (131) facing the protrusion (12). One end of the brush (2) is provided with a positioning hole. The positioning block (131) is inserted into the positioning block (131). The fixing block (13) and the protrusion (12) are respectively attached to the opposite two side surfaces of the brush (2).

3. The foam damping strip structure for a micro DC motor according to claim 2, characterized in that: The protrusion (12) is provided with a receiving groove (121) facing the side wall of the fixing block (13), and the positioning block (131) is located in the receiving groove (121).

4. The foam damping strip structure for a micro DC motor according to claim 1, characterized in that: An adhesive layer is provided between the damping strip (3) and the brush plate (2).

5. The foam damping strip structure for a micro DC motor according to claim 1, characterized in that: The brush (2) is provided with a plurality of threaded posts (21), and the damping strip (3) is provided with a fixing plate. The fixing plate is in contact with the brush (2), and the fixing plate and the damping strip (3) are provided with a plurality of openings (31). The threaded posts (21) extend into the openings (31), and the threaded posts (21) are threaded with nuts (22), which abut against the fixing plate.

6. The foam damping strip structure for a micro DC motor according to claim 5, characterized in that: The fixing piece is made of flexible material.

7. The foam damping strip structure for a micro DC motor according to claim 1, characterized in that: The brush (2) is provided with a slot (23) on the part of the two protrusions (12), and the slot (23) is provided along the length direction of the brush (2).

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