Commutation brush structure for motor and air compressor

Abstract

The utility model relates to the field of automobile air compression equipment, in particular to a commutation electric brush structure for a motor and an air compressor, and the commutation electric brush structure for the motor comprises a mounting rack, a commutator arranged at the central position of the mounting rack, an electric brush assembly fixed on the mounting rack, a coil inductor and a connecting resistor, the mounting frame comprises a mounting plate, a side wall part arranged on the periphery of the mounting plate and a junction box arranged on one side of the side wall part. According to the commutation electric brush structure for the motor, the coil inductor and the electric brush assembly are respectively installed at two sides of the installation rack, so that the installation stability of parts is ensured, the parts are prevented from falling off in the rotation process of the motor, and the commutation electric brush structure is compact in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the field of automobile air compression equipment, in particular to a commutation brush structure for a motor and an air compressor. Background Art

[0002] As the core component of the air suspension system, the air compressor provides dry compressed air for the air suspension system and inputs the compressed air into the air tank or air spring to complete the horizontal adjustment of the vehicle body height.

[0003] The motor is the main power component of the air compressor. The piston movement and motor rotation during operation will cause the air compressor to vibrate greatly. When it is subjected to vibration for a long time, the structural stability between the commutator and brushes inside the motor will be reduced, which can easily cause unstable contact inside the motor, thus affecting the service life of the air compressor. Utility Model Content

[0004] In view of this, the utility model provides a commutation brush structure for a motor and an air compressor, which ensures the stability of component installation and prevents components from falling off during the rotation of the motor by installing the coil inductor and the brush assembly on both sides of the mounting frame respectively, and has a compact structure and is easy to install.

[0005] The utility model solves the technical problem by adopting the following technical solution: a commutation brush structure for a motor is provided, which is used for an air compressor. The commutation brush structure for a motor comprises a mounting frame, a commutator arranged at a central position of the mounting frame, a brush assembly fixed on the mounting frame, a coil inductor and a connection resistor. The mounting frame comprises a mounting plate, a side wall portion arranged around the mounting plate and a junction box arranged on one side of the side wall portion.

[0006] Furthermore, the mounting plate is a circular plate, a mounting hole is provided in the center of the mounting plate, and the mounting hole is suitable for mounting the commutator.

[0007] Furthermore, a first wiring terminal and a second wiring terminal are provided in the junction box, and the first wiring terminal and the second wiring terminal are respectively connected to the positive and negative DC power supplies of the external power supply.

[0008] Furthermore, the commutator includes an insulating body, a commutator segment arranged outside the insulating body, and a hook member arranged at one end of the commutator segment.

[0009] Furthermore, a plurality of commutator segments are provided, and the plurality of commutator segments are respectively fixed on the outer cylindrical surface of the insulating body, and the plurality of commutator segments are arranged at intervals along the circumferential direction, and insulating gaps exist between adjacent commutator segments.

[0010] Furthermore, the brush assembly is provided with two groups, which are respectively fixed on one side surface of the mounting plate and symmetrically arranged on both sides of the commutator. The brush assembly includes a guide shell, a brush arranged in the guide shell, and a spring.

[0011] Furthermore, a symmetrical limiting groove is formed on the inner side wall of the side wall portion of the mounting frame, and one end of the guide shell is placed in the limiting groove. The guide shell includes a bottom plate and a shell portion arranged on the bottom plate.

[0012] Furthermore, the brush is installed in the guide housing, and the brush includes a contact end located at one end, a mounting end located at the other end, and a first wire.

[0013] Furthermore, the coil inductor is fixed on a side surface of the mounting plate away from the brush assembly, two coil inductors are provided, and the positions of the two coil inductors correspond to the positions of the two groups of brush assemblies located on the other side of the mounting plate.

[0014] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an air compressor, including the commutation brush structure for the motor provided by any of the above-mentioned solutions.

[0015] The utility model has the following beneficial effects: the commutation brush structure for a motor and the air compressor of the utility model, the commutation brush structure for a motor comprises a mounting frame, the commutator arranged at the center of the mounting frame, a brush assembly 3 fixed on the mounting frame, a coil inductor and a connection resistor, the mounting frame comprises a mounting plate, a side wall portion arranged around the mounting plate and a junction box arranged on one side of the side wall portion. The commutation brush structure for a motor of the utility model ensures the stability of component installation by respectively installing the coil inductor and the brush assembly on both sides of the mounting frame, avoids the components from falling off during the rotation of the motor, and has a compact structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of a commutation brush structure for a motor of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the commutation brush structure for a motor of the utility model from another perspective;

[0019] Figure 3 It is a structural schematic diagram of the commutator of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the brush assembly of the utility model.

[0021] The names and numbers of the parts in the figure are:

[0022] Commutation brush structure 100 for a motor;

[0023] Mounting frame 1, mounting plate 11, limiting protrusion 111, side wall portion 12, limiting groove 121, junction box 13, first wiring terminal 131, second wiring terminal 132;

[0024] Commutator 2, insulating body 21, commutator segment 22, hook 23;

[0025] Brush assembly 3, guide housing 31, bottom plate 311, housing portion 312, brush 32, contact end 321, mounting end 322, first wire 323, spring 33;

[0026] Coil inductor 4 , connecting resistor 5 ; conductive sheet 6 ; second conductive wire 7 . DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the composition related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] like Figure 1 , Figure 2 As shown, this embodiment provides a commutation brush structure 100 for a motor, including a mounting frame 1, a commutator 2 arranged at the center of the mounting frame 1, a brush assembly 3 fixed on the mounting frame 1, a coil inductor 4 and a connecting resistor 5.

[0029] In some embodiments, the mounting frame 1 includes a mounting plate 11, a side wall portion 12 arranged around the mounting plate 11, and a junction box 13 arranged on one side of the side wall portion 12. The mounting plate 11 is a circular plate, and a mounting hole is opened in the center of the mounting plate 11, and the mounting hole is suitable for mounting the commutator 2. The side wall portion 12 is arranged around the mounting plate 11, and the side wall portion 12 protrudes from the two side surfaces of the mounting plate 11, thereby forming two cylindrical mounting grooves on the two side surfaces of the mounting plate 11, respectively, so as to be suitable for fixing the brush assembly 3, the induction coil 4 and the connection resistor 5 on the mounting plate 11 respectively, and shielding them through the side wall portion 12, thereby improving the safety and stability of the installation of the commutator and the brush assembly. The junction box 13 is arranged on the outside of the side wall portion 12, and a first terminal 131 and a second terminal 132 are arranged in the junction box 13, and the first terminal 131 and the second terminal 132 are respectively connected to the positive and negative DC power supply of the external power supply, thereby realizing power supply to the entire motor.

[0030] In some embodiments, such as Figure 3 As shown, the commutator 2 is mounted in the central part of the mounting frame 1, and specifically, the commutator 2 is mounted in the mounting hole in the center of the mounting plate 11. The commutator 2 includes an insulating body 21, a commutator segment 22 arranged outside the insulating body 21, and a hook 23 arranged at one end of the commutator segment 22. The insulating body 21 is roughly cylindrical, and the internal through hole of the insulating body 21 is suitable for mounting the rotating shaft of the motor (not shown in the figure). There are multiple commutator segments 22, and the multiple commutator segments 22 are respectively fixed on the outer cylindrical surface of the insulating body 21, and the multiple commutator segments 22 are arranged at intervals along the circumferential direction, and there are insulating gaps between adjacent commutator segments 22. Since each commutator segment 22 assembled on the insulating body 21 forms a cylindrical outer surface, it is used for sliding contact with the brush assembly 3, and the commutator 2 is made of copper material, so that the current can be guided through the commutator segment 22. The hook 23 is suitable for electrically connecting with the wire of the armature winding (not shown in the figure) on the motor. Specifically, one end of the motor's rotating shaft is installed through the commutator 2, the armature winding is wound on the outside of the rotating shaft, each end of the wire on the armature winding is hooked on the hook 23, and the wire end is welded to the hook 23, so as to realize electrical connection between the armature winding and the commutator 2.

[0031] In some embodiments, such as Figure 4As shown, two groups of brush assemblies 3 are provided, which are respectively fixed on one side surface of the mounting plate 11 and symmetrically arranged on both sides of the commutator 2. The brush assembly 3 includes a guide shell 31, a brush 32 arranged in the guide shell 31, and a spring 33. A symmetrical limiting groove 121 is also provided on the inner side wall of the side wall portion 12 of the mounting frame 1, and one end of the guide shell 31 is placed in the limiting groove 121 to prevent the guide shell 31 from shifting. The guide shell 31 includes a bottom plate 311 and a shell portion 312 arranged on the bottom plate 311. The side of the bottom plate 11 close to the commutator 2 is arc-shaped and matches the outer side of the commutator 2. The shell 312 is roughly square, and the side of the shell 312 close to the commutator 2 is an arc-shaped open end. The two side surfaces of the shell 312 are respectively provided with connecting holes. Buckles are also provided on both sides of the shell 312, which are suitable for respectively passing through the buckle holes on the bottom plate 311 and the mounting plate 11 for buckle installation, thereby ensuring the stability of the installation of the guide shell 31. The brush 32 is installed in the guide shell 31, and the brush 32 includes a contact end 321 at one end, a mounting end 322 at the other end, and a first wire 323. The contact end 321 is located near the radial outer edge of the commutator 2, and the contact end 321 is located at the arc-shaped open end of the shell 312, thereby facilitating the contact end 321 to contact and connect with the commutator 2. The mounting end 322 is located on a side away from the contact end 321, and the spring 33 is arranged in the guide shell 31. One end of the spring 33 abuts against the mounting end 322 of the brush 32, and the other end of the spring 33 abuts against the inner wall of the guide shell 31. The spring 33 is arranged to apply spring force to the mounting end 322 of the brush 32, so that the contact end 321 of the brush 32 is always in contact with the commutator 2. The first wire 323 extends out through the connecting hole on the side of the shell 312. In addition, the commutation brush structure 100 for the motor of the utility model also includes a plurality of conductive sheets 6, which are fixed on the mounting plate 11, and the first wire 323 is connected to the conductive sheet 6 fixed on the mounting plate 11.

[0032] In some embodiments, the coil inductor 4 is fixed on a side surface of the mounting plate 11 away from the brush assembly 3. Two coil inductors 4 are provided, and the coil inductors 4 are symmetrically arranged on both sides of the commutator 2, and the positions of the two coil inductors 4 correspond to the positions of the two groups of brush assemblies 3 located on the other side of the mounting plate 11. A limiting protrusion 111 is also provided on an end surface of the mounting plate 11 close to the coil inductor 4, and a plurality of limiting protrusions 111 are provided, and the limiting protrusions 111 are suitable for fixing the coil inductor 4. Both ends of the coil inductor 4 are in contact with and connected to the conductive sheet 6. Since the first wire 323 of the brush 32 is connected to the conductive sheet 6, the coil inductor 4 is connected to the brush 32. By setting the coil inductor 4 to be connected to the brush 32, the radiated electromagnetic interference can be weakened.

[0033] In some embodiments, the connection resistor 5 is fixed on a side surface of the mounting plate 11 away from the brush assembly 3, and the connection resistor 5 is located between the two coil inductors 4, and both ends of the connection resistor 5 are connected to the conductive sheet 6. In addition, the commutation brush structure 100 for the motor further includes a second wire 7, one end of the second wire 7 is connected to the conductive sheet 6, and the other end of the second wire 7 is respectively connected to the first terminal 131 and the second terminal 132 in the junction box 13, thereby realizing the connection of the brush assembly 3, the coil inductor 4 and the connection resistor 5 to the DC power supply.

[0034] The commutation brush structure 100 for a motor of the utility model comprises a mounting frame 1, a commutator 2 arranged at the central position of the mounting frame 1, a brush assembly 3 fixed on the mounting frame 1, a coil inductor 4 and a connecting resistor 5. The mounting frame 1 comprises a mounting plate 11, a side wall portion 12 arranged around the mounting plate 11 and a junction box 13. The side wall portion 12 is arranged around the mounting plate 11. The side wall portion 12 protrudes from the two side surfaces of the mounting plate 11, thereby forming two cylindrical mounting grooves on the two side surfaces of the mounting plate 11, respectively, so as to be suitable for fixing the brush assembly 3, the induction coil 4 and the connecting resistor 5 on the mounting plate 11 respectively, and shielding them through the side wall portion 12, thereby improving the safety and stability of the installation of the commutator and the brush assembly. A first terminal 131 and a second terminal 132 are arranged in the junction box 13. The first terminal 131 The second terminal 132 is respectively connected to the positive and negative DC power supply of the external power supply, thereby realizing power supply to the entire motor; the commutator 2 includes an insulating body 21, a commutator segment 22 arranged on the outside of the insulating body 21, and a hook 23 arranged at one end of the commutator segment 22, one end of the motor rotating shaft is installed through the commutator 2, the armature winding is wound on the outside of the rotating shaft, each end of the wire on the armature winding is hooked on the hook 23, and the wire end is welded to the hook 23, so as to realize the electrical connection between the armature winding and the commutator 2; symmetrical limiting grooves 121 are also provided on the inner wall of the side wall portion 12 of the mounting frame 1, and one end of the guide shell 31 is placed in the limiting groove 121 to prevent the guide shell 31 from shifting, and the coil inductor 4 is connected to the brush 32 to reduce the radiated electromagnetic interference. The commutation brush structure 100 for a motor of the present invention ensures the stability of component installation by installing the coil inductor 4 and the brush assembly 3 on both sides of the mounting frame 1 respectively, avoids the components from falling off during the rotation of the motor, and has a compact structure and is easy to install.

[0035] like Figure 4 As shown, an embodiment of the utility model further provides an air compressor, and the air compressor includes the commutation brush structure 100 for a motor provided in any of the above embodiments.

[0036] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A commutation brush structure for a motor, used in an air compressor, characterized in that: The invention comprises a mounting frame, a commutator arranged at the center of the mounting frame, a brush assembly fixed on the mounting frame, a coil inductor and a connecting resistor. The mounting frame comprises a mounting plate, a side wall portion arranged around the mounting plate and a junction box arranged at one side of the side wall portion.

2. The commutation brush structure for a motor according to claim 1, characterized in that: The mounting plate is a circular plate, and a mounting hole is provided in the center of the mounting plate. The mounting hole is suitable for mounting the commutator.

3. The commutation brush structure for a motor according to claim 1, characterized in that: The junction box is provided with a first terminal and a second terminal, and the first terminal and the second terminal are respectively connected to the positive and negative DC power supplies of an external power source.

4. The commutation brush structure for a motor according to claim 1, characterized in that: The commutator comprises an insulating body, a commutator segment arranged outside the insulating body, and a hook member arranged at one end of the commutator segment.

5. The commutation brush structure for a motor according to claim 4, characterized in that: There are a plurality of commutator segments, and the plurality of commutator segments are respectively fixed on the outer cylindrical surface of the insulating body, and the plurality of commutator segments are spaced apart along the circumferential direction, and there are insulating gaps between adjacent commutator segments.

6. The commutation brush structure for a motor according to claim 1, characterized in that: The brush assembly is provided with two groups, which are respectively fixed on one side surface of the mounting plate and symmetrically arranged on both sides of the commutator. The brush assembly includes a guide shell, a brush arranged in the guide shell, and a spring.

7. The commutation brush structure for a motor according to claim 6, characterized in that: A symmetrical limiting groove is also formed on the inner side wall of the side wall portion of the mounting frame. One end of the guide shell is placed in the limiting groove. The guide shell includes a bottom plate and a shell portion arranged on the bottom plate.

8. The commutation brush structure for a motor according to claim 7, characterized in that: The brush is installed in the guide housing, and comprises a contact end at one end, a mounting end at the other end, and a first conductive wire.

9. The commutation brush structure for a motor according to claim 8, characterized in that: The coil inductor is fixed on one side of the mounting plate away from the brush assembly. Two coil inductors are provided, and the positions of the two coil inductors correspond to the positions of the two groups of brush assemblies located on the other side of the mounting plate.

10. An air compressor, characterized in that: The air compressor comprises the commutation brush structure for a motor according to any one of claims 1 to 9.

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