Electric brush elastic mounting structure and motor

Abstract

The utility model relates to the technical field of motors, in particular to an electric brush elastic mounting structure and a motor, the electric brush elastic mounting structure comprises a mounting base and a plurality of groups of electric brush sliding seats, a mounting hole for mounting a commutator is formed in the middle of the mounting base, and the two groups of electric brush sliding seats are mounted on the upper surface of the mounting base at intervals; the electric brush sliding seat is provided with a sliding groove arranged towards the center of the mounting hole, a strip-shaped electric brush is assembled in the sliding groove in a sliding mode, the upper surface of the mounting base is further provided with multiple sets of elastic torsion springs, the elastic torsion springs, the mounting hole and the electric brush sliding seat are arranged in a triangular mode, and the elastic torsion springs are used for driving the strip-shaped electric brush to slide towards the mounting hole. According to the electric brush elastic installation structure and the motor, the elastic torsional spring and the strip-shaped electric brush are of a nonlinear arrangement structure, the overall structure is more compact, the occupied space is small, the market requirement for increasingly miniaturization of the motor can be met, meanwhile, the whole electric brush elastic installation structure is simple and stable, and the problem that parts are loosened or shake is not prone to occurring.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a brush elastic mounting structure and a motor. Background Art

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electric energy according to the law of electromagnetic induction. A permanent magnet DC motor is also composed of a stator pole, a rotor, a brush, a housing, etc. The stator pole is made of permanent magnets (permanent magnetic steel), such as ferrite, aluminum nickel cobalt, and neodymium iron boron. According to its structural form, it can be divided into several types, such as cylindrical type and tile type.

[0003] After searching, the Chinese patent application number: 200820096233.6 discloses a biased brush four-pole DC motor, including a housing, a rotor, a stator, a commutator and a brush assembly; the stator is composed of four magnetic steels fixed in the housing, the rotor is composed of a motor shaft mounted on the housing, an armature core and an armature winding fixed on the shaft, and the brush assembly is composed of a brush box fixed on the housing, a spring fixed in the box, and a brush; the angle between the two brush assemblies arranged on the housing is 90°, and the brush is in contact with the commutator mounted on the motor shaft.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following technical defects that need to be improved:

[0005] In common motor structures, in order to ensure that the brush can always press against the peripheral side wall of the commutator, a spring is usually connected to the side of the brush away from the commutator. Therefore, the brush and the spring always remain in the same straight line, occupying a large space, making it difficult to meet the market demand for increasingly miniaturized motors, and there is also the problem of structural instability. Utility Model Content

[0006] The present application provides a brush elastic mounting structure and a motor to improve the following technical problems:

[0007] In common motor structures, the brushes and springs are always kept in the same straight line, which occupies a large space and makes it difficult to meet the market demand for increasingly miniaturized motors. In addition, there is the problem of structural instability.

[0008] In a first aspect, the present application provides a brush elastic mounting structure, which adopts the following technical solution:

[0009] A brush elastic mounting structure comprises a mounting base and multiple groups of brush slides, wherein a mounting hole for mounting a commutator is arranged in the middle of the mounting base, two groups of brush slides are installed at intervals on the upper surface of the mounting base, the brush slide is provided with a sliding groove arranged toward the center of the mounting hole, a strip brush is slidably assembled in the sliding groove, and multiple groups of elastic torsion springs are also arranged on the upper surface of the mounting base, the elastic torsion springs, the mounting hole and the brush slide are arranged in a triangle, the maximum distance between the elastic torsion spring and the center of the mounting hole is smaller than the maximum distance between the strip brush and the center of the mounting hole, and the elastic torsion spring is used to drive the strip brush to slide toward the mounting hole.

[0010] In an achievable technical solution of the present application, the elastic torsion spring includes a spring body, a support leg and a pressure rod. The upper surface of the mounting base is provided with a vertically arranged column, the spring body is sleeved on the column, the support leg is provided at the bottom of the spring body and pressed against the upper surface of the mounting base, the pressure rod is provided at one end of the spring body away from the support leg, and the pressure rod is used to press against the outer end of the strip brush.

[0011] In an achievable technical solution of the present application, the angle between the support foot and the pressure rod is between 70-120 degrees.

[0012] In a feasible technical solution of the present application, an anti-skid groove is provided at the outer end of the strip brush, and the anti-skid groove is used for the end of the pressure rod to be inserted.

[0013] In an achievable technical solution of the present application, the brush slide comprises a base plate and a U-shaped groove plate, the opening of the U-shaped groove plate is arranged downward, the bottom of the U-shaped groove plate is fixedly connected to the base plate, and the sliding groove is formed by the internal space of the U-shaped groove plate and the upper surface of the base plate.

[0014] In an achievable technical solution of the present application, a first avoidance groove is provided on one side of the U-shaped groove plate close to the elastic torsion spring, and the first avoidance groove is used for allowing a part of the elastic torsion spring to gradually slide in, and the opening of the first avoidance groove is located at one end of the U-shaped groove plate away from the mounting hole.

[0015] In an achievable technical solution of the present application, a second avoidance groove is provided on the side of the U-shaped groove plate away from the elastic torsion spring, and the second avoidance groove is used for allowing the wires of the strip brush to gradually slide out, and the opening of the second avoidance groove is located at one end of the U-shaped groove plate close to the mounting hole.

[0016] In an achievable technical solution of the present application, a plurality of sockets are provided on the bottom plate, a plurality of pins are provided at the bottom of the U-shaped groove plate, the pins and the sockets are arranged in one-to-one correspondence, and the pins are bent 90 degrees outward after being inserted into the sockets.

[0017] In an achievable technical solution of the present application, an arc baffle is vertically arranged on the circumference of the mounting base, the arc baffle is used to block the support leg, two notches are arranged on the arc baffle, and the two notched brush slides and two groups of brush slides are arranged correspondingly.

[0018] In a second aspect, the present application provides a motor, which adopts the following technical solution:

[0019] A motor comprises a motor body and the above-mentioned brush elastic mounting structure.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] The elastic restoring force of the elastic torsion spring can drive the strip brush to always slide toward the mounting hole, thereby achieving the purpose of always keeping the strip brush close to the commutator. Moreover, the elastic torsion spring strip brush has a non-linear arrangement structure, and the overall structure is more compact and occupies less space, which can meet the market demand for increasingly miniaturized motors. At the same time, the entire brush elastic mounting structure has a simple and stable structure, and is not prone to loose or shaking parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of the brush elastic mounting structure and the motor according to an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the elastic torsion spring and the brush slide in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the structure of the motor of an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1. Mounting base; 11. Mounting hole; 12. Arc baffle; 13. Column;

[0028] 2. brush slide; 21. bottom plate; 211. socket; 22. U-shaped slot plate; 221. first avoidance slot; 222. second avoidance slot; 223. pin;

[0029] 3. Strip brush; 31. Anti-skid groove;

[0030] 4. elastic torsion spring; 41. spring body; 42. support foot; 43. pressure rod;

[0031] 200. Motor body. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] The following is combined with Figure 1-3 This application is described in further detail.

[0037] The embodiment of the present application discloses a brush elastic mounting structure. Figure 1 and Figure 2The brush elastic mounting structure includes a mounting base 1 and multiple groups of brush slides 2. A mounting hole 11 for mounting a commutator is provided in the middle of the mounting base 1. Two groups of brush slides 2 are installed at intervals on the upper surface of the mounting base 1. A sliding groove arranged toward the center of the mounting hole 11 is provided on the brush slide 2. A strip brush 3 is slidably assembled in the sliding groove. Multiple groups of elastic torsion springs 4 are also provided on the upper surface of the mounting base 1. The elastic torsion springs 4 and the brush slides 2 are arranged one by one. The elastic torsion springs 4, the mounting hole 11 and the brush slides 2 are arranged in a triangular shape. The maximum distance between the elastic torsion spring 4 and the center of the mounting hole 11 is smaller than the maximum distance between the strip brush 3 and the center of the mounting hole 11. The elastic torsion spring 4 is used to drive the strip brush 3 to slide toward the mounting hole 11. In the present embodiment, only two groups of elastic torsion springs 4 are provided.

[0038] The beneficial technical effects of the brush elastic mounting structure of the embodiment of the present application are roughly as follows:

[0039] The elastic restoring force of the elastic torsion spring 4 can drive the strip brush 3 to always slide toward the mounting hole 11, thereby achieving the purpose of always keeping the strip brush 3 close to the commutator. Moreover, the elastic torsion spring 4 and the strip brush 3 are arranged in a non-linear structure, and the overall structure is more compact and occupies less space, which can meet the market demand for increasingly miniaturized motors. At the same time, the entire brush elastic mounting structure has a simple and stable structure, and is not prone to loose or shaking parts.

[0040] In this embodiment, the elastic torsion spring 4 includes a spring body 41, a support leg 42 and a pressure rod 43. A vertically arranged column 13 is provided on the upper surface of the mounting base 1. The spring body 41 is sleeved on the column 13. The support leg 42 is provided at the bottom of the spring body 41 and pressed against the upper surface of the mounting base 1. The pressure rod 43 is provided at one end of the spring body 41 away from the support leg 42. The pressure rod 43 is used to press against the outer end of the strip brush 3.

[0041] In order to improve the installation firmness of the elastic torsion spring 4, an arc baffle 12 is vertically arranged on the periphery of the installation base 1, and the arc baffle 12 is used to block the support leg 42. Two notches are arranged on the arc baffle 12, and the two notched brush slides 2 and the two groups of brush slides 2 are arranged correspondingly.

[0042] The included angle between the support leg 42 and the pressure rod 43 is between 70-120 degrees. Preferably, in this embodiment, the included angle is 80 degrees.

[0043] In order to prevent the pressure rod 43 from slipping when it is pressed against the outer end of the strip brush 3 , an anti-skid groove 31 is provided at the outer end of the strip brush 3 , and the anti-skid groove 31 is used for the end of the pressure rod 43 to be inserted.

[0044] The elastic torsion spring 4 designed above has a simple structure, is convenient to manufacture and install, has a relatively low manufacturing and assembly cost, and is easy to replace and maintain later.

[0045] In this embodiment, the brush slide 2 includes a base plate 21 and a U-shaped groove plate 22. The opening of the U-shaped groove plate 22 is arranged downward, the bottom of the U-shaped groove plate 22 is fixedly connected to the base plate 21, and the sliding groove is formed by the internal space of the U-shaped groove plate 22 and the upper surface of the base plate 21.

[0046] As the length of the strip brush 3 becomes shorter with the increase of usage time, the contact point between the elastic torsion spring 4 and the strip brush 3 will continue to move toward the mounting hole 11. Therefore, a first avoidance groove 221 is provided on the side of the U-shaped groove plate 22 close to the elastic torsion spring 4. The first avoidance groove 221 is used for a part of the elastic torsion spring 4 to gradually slide in. The opening of the first avoidance groove 221 is located at the end of the U-shaped groove plate 22 away from the mounting hole 11.

[0047] As the length of the strip brush 3 becomes shorter with the increase of usage time, the wires connected to the strip brush 3 will continue to move toward the mounting hole 11. Therefore, a second avoidance groove 222 is provided on the side of the U-shaped groove plate 22 away from the elastic torsion spring 4. The second avoidance groove 222 is used to allow the wires of the strip brush 3 to gradually slide out. The opening of the second avoidance groove 222 is located at one end of the U-shaped groove plate 22 close to the mounting hole 11.

[0048] In order to facilitate the quick assembly and connection of the bottom plate 21 and the U-shaped groove plate 22, a plurality of sockets 211 are provided on the bottom plate 21, and a plurality of pins 223 are provided at the bottom of the U-shaped groove plate 22. The pins 223 and the sockets 211 are arranged one by one. After the pins 223 are inserted into the sockets 211, they are bent outward by 90 degrees.

[0049] Reference Figure 1 and Figure 3 The embodiment of the present application also discloses a motor, including a motor body 200 and the brush elastic mounting structure as described above.

[0050] On the basis of the above-mentioned advantages of the brush elastic mounting structure of the present application, the motor of the present application also has the above-mentioned advantages, namely: the elastic restoring force of the elastic torsion spring 4 can drive the strip brush 3 to always slide toward the mounting hole 11, thereby achieving the purpose of always keeping the strip brush 3 close to the commutator, and the elastic torsion spring 4 and the strip brush 3 are non-linearly arranged structures, the overall structure is more compact, and occupies less space, which can meet the market demand for increasingly miniaturized motors. At the same time, the structure of the entire brush elastic mounting structure is simple and stable, and it is not easy to have problems with loose or shaking components.

[0051] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. A brush elastic mounting structure, characterized in that: The invention comprises a mounting base (1) and a plurality of groups of brush slides (2); a mounting hole (11) for mounting a commutator is arranged in the middle of the mounting base (1); two groups of brush slides (2) are installed on the upper surface of the mounting base (1) at intervals; a sliding groove arranged toward the center of the mounting hole (11) is arranged on the brush slide (2); a strip brush (3) is slidably mounted in the sliding groove; a plurality of groups of elastic torsion springs (4) are also arranged on the upper surface of the mounting base (1); the elastic torsion springs (4), the mounting hole (11) and the brush slides (2) are arranged in a triangle; the maximum distance between the elastic torsion spring (4) and the center of the mounting hole (11) is smaller than the maximum distance between the strip brush (3) and the center of the mounting hole (11); and the elastic torsion spring (4) is used to drive the strip brush (3) to slide toward the mounting hole (11).

2. The brush elastic mounting structure according to claim 1, characterized in that: The elastic torsion spring (4) comprises a spring body (41), a support leg (42) and a pressure rod (43); the upper surface of the mounting base (1) is provided with a vertically arranged column (13); the spring body (41) is sleeved on the column (13); the support leg (42) is provided at the bottom of the spring body (41) and pressed against the upper surface of the mounting base (1); the pressure rod (43) is provided at one end of the spring body (41) away from the support leg (42); and the pressure rod (43) is used to press against the outer end of the strip brush (3).

3. The brush elastic mounting structure according to claim 2, characterized in that: The angle between the support foot (42) and the pressure rod (43) is between 70 and 120 degrees.

4. The brush elastic mounting structure according to claim 2, characterized in that: The outer end of the strip brush (3) is provided with an anti-skid groove (31), and the anti-skid groove (31) is used for the end of the pressure rod (43) to be inserted.

5. The brush elastic mounting structure according to claim 1, characterized in that: The brush slide seat (2) comprises a bottom plate (21) and a U-shaped groove plate (22), the opening of the U-shaped groove plate (22) is arranged downward, the bottom of the U-shaped groove plate (22) is fixedly connected to the bottom plate (21), and the sliding groove is formed by the internal space of the U-shaped groove plate (22) and the upper surface of the bottom plate (21).

6. The brush elastic mounting structure according to claim 5, characterized in that: A first avoidance groove (221) is provided on a side of the U-shaped groove plate (22) close to the elastic torsion spring (4), the first avoidance groove (221) being used for allowing a part of the elastic torsion spring (4) to gradually slide in, and an opening of the first avoidance groove (221) is located at an end of the U-shaped groove plate (22) away from the mounting hole (11).

7. The brush elastic mounting structure according to claim 5, characterized in that: A second avoidance groove (222) is provided on a side of the U-shaped groove plate (22) away from the elastic torsion spring (4), and the second avoidance groove (222) is used to allow the electric wires of the strip brush (3) to gradually slide out, and the opening of the second avoidance groove (222) is located at one end of the U-shaped groove plate (22) close to the mounting hole (11).

8. The brush elastic mounting structure according to claim 5, characterized in that: The bottom plate (21) is provided with a plurality of plug holes (211), the bottom of the U-shaped groove plate (22) is provided with a plurality of plug pins (223), the plug pins (223) and the plug holes (211) are arranged in a one-to-one correspondence, and the plug pins (223) are bent outwards by 90 degrees after being inserted into the plug holes (211).

9. The brush elastic mounting structure according to claim 2, characterized in that: A circular arc baffle (12) is vertically arranged on the circumference of the mounting base (1), the circular arc baffle (12) is used to block the support foot (42), and two notches are arranged on the circular arc baffle (12), and the two notched brush slides (2) and the two groups of brush slides (2) are arranged correspondingly.

10. A motor, characterized in that: It comprises a motor body (200) and a brush elastic mounting structure as claimed in any one of claims 1 to 9.

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