The structure of small space brush assembly

Abstract

The utility model discloses a structure of a small-space brush assembly, and relates to the technical field of brushes. The structure of the small-space brush assembly comprises a brush holder and a brush assembly, wherein the brush assembly is located inside the brush holder, the brush assembly comprises a spring sheet, a brush fixing plate, a brush and a fixing sheet, the number of the spring sheets is two and both are arranged inside the brush holder, the number of the brush fixing plates is multiple and both are fixedly connected with the corresponding spring sheets, the number of the brushes is the same as the brush fixing plates and both are arranged on the surface of the brush fixing plates, the fixing sheet is arranged on the surface of the brush holder, the spring sheet is electrically connected with the fixing sheet, both sides of the brush are provided with grooves for fixing on the brush fixing plate, the firmness of the brush and the brush fixing plate is increased, the spring sheet is used to replace the elastic force of the spring or torsion spring, and the spring sheet is used to replace the braided wire for electrification, so as to save space and solve the problem that the brush assembly requires a large space and is difficult to use on a tiny motor.

Description

Technical Field

[0001] The utility model relates to the technical field of electric brushes, in particular to the structure of an electric brush assembly in a small space. Background Art

[0002] The brush device is a device that connects the rotating conductive part of the motor, such as the commutator, slip ring, etc., with the fixed part. In a DC motor, the brush connects the rotating armature to the external circuit, so that the current is input into the armature or output from the armature through the brush. In a synchronous motor, the excitation current is input to the rotor coil through the brush and slip ring. Wound-rotor induction motors also use brushes to connect resistors in the rotor circuit. The brush device consists of brushes, brush holders, brush rods, brush rod seats, bus bars, etc. The brush is placed in the brush box of the brush holder and pressed against the commutator with a spring to maintain a certain pressure. The brush is usually made of graphite, so it is also called a carbon brush.

[0003] The brush assembly currently used generally includes a brush with a mounting wire, a brush holder, and a compression spring (torsion spring or vortex spring). It requires a large space and is difficult to apply to a micro motor. Therefore, a small space brush assembly structure is needed. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and to provide a structure of a small-space brush assembly, which can solve the problem that the existing brush assembly requires a large space and is difficult to use on a tiny motor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the structure of a small space brush assembly includes a brush holder and a brush assembly, the brush assembly is located inside the brush holder, the brush assembly includes a spring sheet, a brush fixing plate, a brush and a fixing sheet, the number of spring sheets is two and both are arranged inside the brush holder, the number of brush fixing plates is multiple and both are fixedly connected to the corresponding spring sheets, the number of brushes is the same as the brush fixing plates and both are arranged on the surface of the brush fixing plates, the fixing sheet is arranged on the surface of the brush holder, and the spring sheet is electrically connected to the fixing sheet.

[0006] Preferably, grooves for fixing the brush on a brush fixing plate are provided on both sides of the brush.

[0007] Preferably, a receiving groove is provided in the inner cavity of the brush holder, and a spring sheet groove for receiving the spring sheet is provided in the inner cavity of the brush holder.

[0008] Preferably, a red mounting wire and a black mounting wire are welded to one side of the two spring sheets respectively, a first slot for accommodating the red mounting wire is provided inside the brush holder, and a second slot for accommodating the black mounting wire is provided inside the brush holder.

[0009] Preferably, a plurality of mounting holes are provided on the surface of the brush holder.

[0010] Preferably, a rotor matching the brush is provided on one side of the brush holder.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The structure of the small space brush assembly utilizes springs to replace the elastic force of springs or torsion springs, and uses springs to replace braided wires for power transmission, thereby saving space and solving the problem that existing brush assemblies require a large space and are difficult to use on tiny motors.

[0013] (2) The structure of the small space brush assembly enables the brush to be firmly mounted on the surface of the brush fixing plate through the groove and the bend on the brush fixing plate, thereby increasing firmness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the main body of the utility model;

[0016] Figure 2 It is an internal schematic diagram of the utility model;

[0017] Figure 3 It is a plan view of the utility model;

[0018] Figure 4 This is a schematic diagram of a brush holder of the utility model;

[0019] Figure 5 It is a schematic diagram of the brush assembly of the utility model;

[0020] Figure 6 For the utility model Figure 5 Schematic diagram at point A in the middle.

[0021] Figure numerals: 1. brush holder; 2. rotor; 3. red mounting line; 4. black mounting line; 5. receiving groove; 6. mounting hole; 7. spring clip; 8. brush fixing plate; 9. brush; 10. groove; 11. fixing plate; 12. slot one; 13. slot two; 14. spring clip slot. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] See also Figure 1-6 The utility model provides a technical solution: the structure of a small space brush assembly, including a brush holder 1 and a brush assembly, the brush assembly is located inside the brush holder 1, the brush assembly includes a spring sheet 7, a brush fixing plate 8, a brush 9 and a fixing plate 11, the number of spring sheets 7 is two and both are arranged inside the brush holder 1, the two ends of the spring sheet 7 extend out of the inside of the brush holder 1, the middle part of the spring sheet 7 is fixed inside the brush holder 1, the spring sheet 7 can provide elastic force and can be used for conduction, and is a part of the circuit, the number of brush fixing plates 8 is multiple and both are fixedly connected with the corresponding spring sheets 7, the brush fixing plates 8 and the spring sheets 7 can be welded or riveted, the number of brushes 9 is the same as that of the brush fixing plates 8 and both are arranged on the surface of the brush fixing plates 8, the fixing plate 11 is arranged on the surface of the brush holder 1, the spring sheet 7 is electrically connected to the fixing plate 11, and grooves 10 for fixing on the brush fixing plates 8 are provided on both sides of the brush 9, and the brush 9 can be firmly installed on the surface of the brush fixing plates 8 through the grooves 10 and the bending part on the brush fixing plates 8.

[0027] Furthermore, a red mounting wire 3 and a black mounting wire 4 are welded to one side of the two spring pieces 7, respectively; a slot 12 for accommodating the red mounting wire 3 is provided inside the brush holder 1, and a slot 2 13 for accommodating the black mounting wire 4 is provided inside the brush holder 1; the red mounting wire 3 and the black mounting wire 4 are both soldered together with the corresponding spring pieces 7 to form a part of the circuit.

[0028] Secondly, a receiving groove 5 is opened in the inner cavity of the brush holder 1, and a spring slot 14 for accommodating the spring 7 is opened in the inner cavity of the brush holder 1. The spring slot 14 is used to accommodate the brush assembly. A plurality of mounting holes 6 are opened on the surface of the brush holder 1, and a rotor 2 for matching the brush is provided on one side of the brush holder 1.

[0029] Working principle: In a limited space, the spring clip 7 is used to replace the elastic force of the spring or torsion spring, and the spring clip 7 is used to replace the braided wire for power supply. The installation wire is welded to the spring clip 7, and the brush 9 is fixed on the brush fixing plate 8. The brush fixing plate 8 is welded or riveted to the spring clip 7. The brush assembly is placed in the spring clip groove 14 inside the brush holder 1 and fixed with glue. During assembly, the brush fixing plate 8 fixes the brush 9 through the groove 10, and the brush fixing plate 8 and the spring clip 7 are connected by electric welding or riveting. The black installation wire 4 and the red installation wire 3 are respectively welded to the spring clip 7, and the fixing plate 11 is fixed with glue. The brush holder 1 and the brush assembly are installed together, and the assembly is completed.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. The structure of the small space brush assembly is characterized by: include: Brush holder (1); A brush assembly is provided, the brush assembly is located inside a brush holder (1), the brush assembly comprises a spring sheet (7), a brush fixing plate (8), a brush (9) and a fixing plate (11), the number of spring sheets (7) is plural and all are arranged inside the brush holder (1), the number of brush fixing plates (8) is two and all are fixedly connected to the corresponding spring sheets (7), the number of brushes (9) is the same as that of the brush fixing plates (8) and all are arranged on the surface of the brush fixing plates (8), the fixing plate (11) is arranged on the surface of the brush holder (1), and the spring sheet (7) and the fixing plate (11) are electrically connected.

2. The structure of the small space brush assembly according to claim 1, characterized in that: Grooves (10) for fixing the brush on the brush fixing plate (8) are provided on both sides of the brush (9).

3. The structure of the small space brush assembly according to claim 2, characterized in that: The inner cavity of the brush holder (1) is provided with a receiving groove (5), and the inner cavity of the brush holder (1) is provided with a spring sheet groove (14) for receiving a spring sheet (7).

4. The structure of the small space brush assembly according to claim 3, characterized in that: A red mounting wire (3) and a black mounting wire (4) are respectively welded to one side of the two spring sheets (7); a first slot (12) for accommodating the red mounting wire (3) is provided inside the brush holder (1); and a second slot (13) for accommodating the black mounting wire (4) is provided inside the brush holder (1).

5. The structure of the small space brush assembly according to claim 4, characterized in that: A plurality of mounting holes (6) are provided on the surface of the brush holder (1).

6. The structure of the small space brush assembly according to claim 5, characterized in that: A rotor (2) matching the brush is provided on one side of the brush holder (1).

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