Anti-falling brush holder power line fixing structure

Abstract

The utility model discloses an anti-falling brush holder power line fixing structure, which comprises an annular brush holder body, a carbon brush is arranged on the inner ring of the brush holder body in a combined manner, a power line is led out from the carbon brush in a welding manner, and the brush holder body is provided with a line passing hole penetrating through the end faces of the two sides of the brush holder body. And the welded power line passes through the line passing hole and then is led out. According to the anti-falling brush carrier power line fixing structure, a non-welding area stress transfer power line fixing scheme is adopted, so that an external force acting point can be far away from a welding point, the connection reliability of a power line led out of a brush carrier is improved, and the structure is simple in form and easy to realize.

Description

Technical Field

[0001] This utility model relates to a motor structure, and more particularly to a brush holder power cord fixing structure to prevent detachment. Background Technology

[0002] In existing technologies, the power cord leading out of the brush holder is generally fixed by direct soldering. That is, the soldering point between the power cord and the carbon brush is the only fixing point of the power cord on the brush holder, and then the power cord is directly led out. This fixing structure has the following defects:

[0003] 1. Stress concentration: Solder hardening causes a sudden change in mechanical properties at the solder joint of the power cord. When vibrated or bent, stress is concentrated at the solder joint, which can easily cause the power cord to fall off.

[0004] 2. Poor reliability: The power cord is fixed by direct soldering, which cannot effectively cope with complex application environments;

[0005] 3. Space constraints: For miniature brush holders, it is not possible to install traditional wire clamps or sleeves for protection. Utility Model Content

[0006] This utility model addresses the shortcomings of existing technologies by providing a brush holder power cord fixing structure to prevent detachment.

[0007] The present invention relates to a brush holder power cord fixing structure for preventing detachment, comprising an annular brush holder body, wherein a carbon brush is disposed in conjunction with the inner ring of the brush holder body, and a power cord is welded out from the carbon brush. The brush holder body has through holes that pass through both end faces of the brush holder body, and the welded power cord passes through the through holes and is then led out.

[0008] In the anti-detachment power cord fixing structure of the brush holder described in this utility model, the outer side wall of the brush holder body is provided with a recessed wire outlet at the position corresponding to the welding point of the carbon brush and the power cord, and the end face of the brush holder body between the wire outlet and the wire passage hole is provided with a buried wire groove.

[0009] After welding, the power cord is successively embedded in the outlet recess and the embedding groove before passing through the wire hole and being led out.

[0010] In the anti-detachment power cord fixing structure of the brush holder described in this utility model, the brush holder body is provided with a protective part for protecting the welding point between the power cord and the carbon brush by protruding from the end face corresponding to the outlet recess.

[0011] In the anti-detachment power cord fixing structure of the brush holder described in this utility model, the outer edge of the brush holder body is provided with a concave wire passage notch, and the two sides of the wire passage notch are respectively connected to the buried wire groove and the wire outlet groove.

[0012] After welding, the power cord is embedded in the outlet recess and then led to the wire passage notch. After passing through the wire passage notch, it is embedded in the wire embedding groove and led to the wire passage hole before exiting.

[0013] In the anti-detachment brush holder power cord fixing structure of this utility model, the welding point of the power cord and the power cord are both glued to the brush holder body.

[0014] The power cord fixing structure for preventing brush holder detachment described in this utility model adopts a power cord fixing scheme with stress transfer in the non-welded area, which allows the point of application of external force to be far away from the welding point, thereby improving the connection reliability of the power cord led out from the brush holder. Moreover, the structure is simple and easy to implement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the anti-detachment brush holder power cord fixing structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the brush holder body in the anti-detachment brush holder power cord fixing structure of this utility model. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0018] like Figure 1 , Figure 2 As shown, the anti-detachment power cord fixing structure for the brush holder of this utility model includes an annular brush holder body 1. A carbon brush (not shown in the figure, the carbon brush is fixed by a fixing member located at the fixing hole 22) is mounted on the inner ring of the brush holder body 1. A power cord 2 is soldered out from the carbon brush. In this utility model, the brush holder body 1 also has wire-passing holes 10 penetrating both end faces of the brush holder body 1. The soldered power cord 2 passes through the wire-passing holes 10 and is then led out.

[0019] To facilitate the addition of protective accessories such as sleeves to the power cord 2, the diameter of the wire passage hole 10 is usually 0.1 to 0.4 mm larger than the diameter of the power cord 2, and the direction of the wire passage hole 10 is perpendicular to the two end faces of the brush holder body 1.

[0020] In this utility model, the power cord 2 is vertically led out from the wire hole 10 at a predetermined distance from the welding point 21 of the power cord 2. A power cord fixing scheme with stress transfer in the non-welding area is adopted, so that the point of application of external force can be far away from the welding point 21, thereby improving the reliability of the power cord led out from the brush holder. Moreover, the structure is simple and easy to implement.

[0021] Furthermore, in this invention, the outer wall of the brush holder body 1 is provided with a recessed wire outlet recess 11 at the position corresponding to the welding point 21 between the carbon brush and the power cord 2. A wire embedding groove 12 is provided between the wire outlet recess 11 and the wire passage hole 10 on the end face of the brush holder body. The welded power cord 2 is sequentially embedded in the wire outlet recess 11 and the wire embedding groove 12 before passing through the wire passage hole 10 and being led out. To avoid the power cord 2 exposing the side wall and end face contours of the brush holder body 1, the width and depth of the wire outlet recess 11 and the wire embedding groove 12 are 1.2 to 1.5 times the diameter of the power cord 2. In addition, a protective part 14 for protecting the welding point 21 between the power cord 2 and the carbon brush is also provided on the end face of the brush holder body 1 corresponding to the outlet recess 11. The protective part 14 is generally in the form of a thin plate, that is, the end face of the brush holder body 1 extends to the top of the welding point 21, and its edge contour is flush with the outer contour of the brush holder body 1.

[0022] In the anti-detachment power cord fixing structure of the brush holder described in this utility model, a recessed wire-passing notch 13 is provided on the outer edge of the brush holder body 1, and the two sides of the wire-passing notch 13 are respectively connected to the wire-embedding groove 12 and the wire-outlet recess 11. Thus, the welded power cord 2 is embedded in the wire-outlet recess 11 and then led to the wire-passing notch 13, then through the wire-passing notch 13, and finally embedded in the wire-embedding groove 12 and led to the wire-passing hole 10 before exiting. This structure ensures that the outer contour of the power cord 2 does not exceed the end face or outer edge of the brush holder body 1, and also improves the stress structure of the power cord 2. In contrast to the prior art where the welding point of the power cord 2 is directly stressed, while the position of the welding point 21 remains unchanged, in this utility model, the wire-passing notch 13, the wire-embedding groove 12, and the wire-passing hole 10 are all stressed separately, thereby preventing the power cord 2 from breaking at the welding point with the carbon brush due to pulling, bending, or vibration, effectively ensuring the reliability of the power cord connection. In actual operation, adhesive can also be applied to the welding point 21 and the embedded groove 12 of the power cord 2 to adhere the power cord 2 to the brush holder body 1, thereby further increasing the strength.

[0023] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A power cord fixing structure for preventing brush holder detachment, comprising an annular brush holder body, wherein a carbon brush is disposed on the inner ring of the brush holder body, and a power cord is welded out from the carbon brush, characterized in that, The brush holder body has through holes that pass through both ends of the brush holder body, and the soldered power cord is led out after passing through the through holes.

2. The anti-detachment brush holder power cord fixing structure as described in claim 1, characterized in that, The outer side wall of the brush holder body is provided with a recessed wire outlet at the position corresponding to the welding point between the carbon brush and the power cord, and the end face of the brush holder body between the wire outlet and the wire passage hole is provided with a wire embedding groove. After welding, the power cord is successively embedded in the outlet recess and the embedding groove before passing through the wire hole and being led out.

3. The anti-detachment brush holder power cord fixing structure as described in claim 2, characterized in that, The brush holder body has a protective part that protrudes from the end face corresponding to the outlet recess to protect the welding point between the power cord and the carbon brush.

4. The anti-detachment brush holder power cord fixing structure as described in claim 2, characterized in that, The outer edge of the brush holder body is provided with a recessed wire passage notch, and the two sides of the wire passage notch are respectively connected to the wire embedding groove and the wire outlet recess. After welding, the power cord is embedded in the outlet recess and then led to the wire passage notch. After passing through the wire passage notch, it is embedded in the wire embedding groove and led to the wire passage hole before exiting.

5. The anti-detachment brush holder power cord fixing structure as described in claim 1, 2, 3, or 4, characterized in that, The solder joints of the power cord and the power cord itself are adhered to the brush holder body by adhesive.

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