Motor carbon brush assembly with high stability and motor with assembly

Abstract

The utility model relates to a high-stability motor carbon brush assembly and a motor with the same, the high-stability motor carbon brush assembly comprises a shell and a bottom cover covering the shell, a rotating shaft is arranged at one end, deviating from the bottom cover, of the shell in a penetrating manner, one end of the rotating shaft extends into the shell, and the other end of the rotating shaft extends out of the shell; the end, extending into the shell, of the rotating shaft is provided with an electromagnetic driving assembly used for driving the rotating shaft to rotate, and the bottom cover is provided with a carbon brush assembly used for powering on the electromagnetic driving assembly. The carbon brush has the advantage that the conductive stability of the carbon brush is higher.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor carbon brush assembly with high stability and a motor with the assembly. Background Art

[0002] Carbon brushes are a component used in DC motors, usually made of carbon material. Carbon brushes transfer current to the rotor by contacting the collector ring of the motor rotor, thereby generating electromagnetic force to make the motor rotate.

[0003] The motor in the prior art includes a housing, a rotating shaft passing through the housing, an electromagnetic drive assembly disposed in the housing for driving the rotating shaft to rotate, and a carbon brush assembly for connecting a power source and transmitting the power source electric energy to the electromagnetic drive assembly. The electromagnetic drive assembly is sleeved on the rotating shaft, wherein the carbon brush assembly includes a carbon brush holder disposed on the housing, a support arm disposed on the carbon brush holder, and a carbon brush disposed on the support arm, and the carbon brush abuts against the electromagnetic drive assembly. When working, by connecting the power source to one end of the support arm, electric energy is transmitted from the support arm to the carbon brush, and then from the carbon brush to the electromagnetic drive assembly.

[0004] However, in the motor of the related art, when the electromagnetic drive assembly drives the shaft to rotate, the carbon brush and the support arm are easily shaken, which is not conducive to the stability of the transmission of electric energy from the carbon brush to the electromagnetic drive assembly. Utility Model Content

[0005] In order to improve the problem that the carbon brush and the support arm are prone to shaking when the existing electromagnetic drive assembly drives the shaft to rotate, the present application provides a motor carbon brush assembly and a motor with the assembly that prevents the carbon brush and the support arm from shaking and enables the carbon brush to better abut against the commutation plate to transmit current more stably.

[0006] The present application provides a motor carbon brush assembly with high stability and a motor with the assembly adopts the following technical solution:

[0007] A motor carbon brush assembly with high stability and a motor with the assembly, comprising a housing and a bottom cover covering the housing, wherein a rotating shaft is penetrated through one end of the housing away from the bottom cover, one end of the rotating shaft extends into the housing, and the other end extends out of the housing, an electromagnetic drive assembly for driving the rotating shaft to rotate is arranged at the end of the rotating shaft extending into the housing, and a carbon brush assembly for energizing the electromagnetic drive assembly is arranged on the bottom cover;

[0008] The carbon brush assembly includes a carbon brush holder arranged on the bottom cover, a connecting arm arranged on the carbon brush holder and a carbon brush arranged on the connecting arm, the connecting arm includes a penetration portion and a supporting portion, the penetration portion is penetrated through the carbon brush holder, both ends of the penetration portion extend out of the carbon brush holder, the end of the penetration portion located outside the bottom shell is used to connect to a power supply, the other end of the penetration portion is connected to one end of the supporting portion, the carbon brush is penetrated at an end of the supporting portion away from the penetration portion, both ends of the carbon brush extend out of the supporting portion, one side of the carbon brush abuts against the electromagnetic drive assembly, a protrusion is also provided on the penetration portion of the connecting arm, the carbon brush holder is provided with a groove corresponding to the protrusion, the shape of the groove is opened corresponding to the shape of the protrusion, the connecting arm is plugged into and matched with the carbon brush holder, and a stabilizing rod is also provided on the side of the bottom cover facing the inside of the shell, one end of the stabilizing rod is connected to the bottom cover, and the other end of the stabilizing rod abuts against the supporting portion.

[0009] By adopting the above technical solution, when working, the end of the penetration part outside the shell is connected to the power supply, and the electric energy is transported to the carbon brush through the connecting arm, and then to the electromagnetic drive assembly through the carbon brush, and the electromagnetic drive assembly drives the rotating shaft to rotate. The plug-in cooperation of the protrusion and the groove is helpful to prevent the connecting arm from shaking back and forth, and the support arm is supported by the stabilizing rod to prevent the carbon brush and the support arm from shaking, so that the carbon brush can better contact with the commutation plate, so as to transmit current more stably.

[0010] Preferably, the connecting arm is made of a metal material with good electrical conductivity, and the connecting arm includes a copper alloy material.

[0011] By adopting the above technical solution, the copper alloy has higher electrical conductivity and mechanical strength, which is conducive to making the connecting arm have good electrical contact and stable working performance.

[0012] Preferably, one end of the stabilizing rod abutting against the supporting portion is arranged in a U shape, and the side of the carbon brush facing away from the electromagnetic drive assembly extends into the U shape of the stabilizing rod.

[0013] By adopting the above technical solution, it is beneficial to support both sides of the carbon brush through the two ends of the U shape, making the support more stable.

[0014] Preferably, the electromagnetic drive assembly includes a permanent magnet arranged on the inner wall of the outer shell and a winding coil sleeved on the rotating shaft, the permanent magnet is clamped to the outer shell, the two permanent magnets facing each other are arranged with opposite poles, the winding coil is located between the two permanent magnets facing each other, a commutator is also sleeved on the rotating shaft, the carbon brush abuts the commutator, and the end of the commutator away from the carbon brush is clamped to the winding coil.

[0015] By adopting the above technical solution, when working, electric energy is transferred to the commutator through the carbon brush, and then to the winding coil through the commutator, so that the winding coil is energized and a complete circuit is formed, so that the magnetic field generated by the winding coil interacts with the magnetic field of the permanent magnet, so that a torque is generated to drive the winding coil to rotate, thereby driving the rotating shaft to rotate.

[0016] Preferably, two permanent magnets are provided, the two permanent magnets are relatively distributed, and the magnetic poles of the two permanent magnets facing each other are opposite.

[0017] The adoption of the above technical solution is beneficial to improving the magnetic density between the two permanent magnets.

[0018] Preferably, the winding coil includes a plurality of discs and windings wound on the discs, the plurality of discs are aligned with each other and stacked to form a disc group, the disc group is sleeved on one end of the rotating shaft extending into the housing, and the coil is wrapped around the disc group.

[0019] By adopting the above technical solution, the winding coils are distributed on a plurality of discs, so that the coils can be maintained and repaired in sections, thereby improving the maintainability and reliability of the equipment.

[0020] Preferably, the disc comprises a silicon steel sheet.

[0021] By adopting the above technical scheme, the silicon steel sheet has high magnetic permeability, low hysteresis loss, high resistivity and low iron loss. Among them, the high resistivity is beneficial to limiting the generation of eddy currents, thereby reducing eddy current losses, and the low magnetic permeability is also beneficial to reducing iron losses and reducing magnetic flux losses.

[0022] Preferably, the commutator includes a sleeve sleeved on a rotating shaft and a plurality of commutator plates arranged on the sleeve, the plurality of commutator plates are arranged at equal intervals along the circumferential direction of the sleeve, a connecting wing is provided at one end of the commutator plate close to the winding, and the connecting wing is clamped with the winding.

[0023] By adopting the above technical solution, the direction of current flow in the winding can be changed by rotating the sleeve and the commutation plate, thereby realizing the commutation operation of the motor, which is beneficial to ensure the normal operation of the motor.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When working, the end of the penetration part outside the shell is connected to the power supply, and the electric energy is transported to the carbon brush through the connecting arm, and then to the commutation plate through the carbon brush, and then to the winding through the commutation plate. Thus, the magnetic field generated by the winding coil interacts with the magnetic field of the permanent magnet to drive the winding coil to rotate, thereby generating a torque to drive the winding coil to rotate, thereby driving the rotating shaft to rotate, so as to realize the motor function;

[0026] 2. The plug-in fit between the protrusion and the groove helps prevent the connecting arm from shaking back and forth. The support arm is supported by the stabilizer bar to prevent the carbon brush and the support arm from shaking, so that the carbon brush can better contact the commutation plate to facilitate more stable current transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 It is an exploded diagram of the overall structure of an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the structure of the winding coil in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the structure of the bottom cover in the embodiment of the present application.

[0031] Figure 5 It is a structural explosion diagram of the carbon brush assembly in the embodiment of the present application.

[0032] Explanation of the accompanying drawings: 1. outer shell; 2. bottom cover; 3. rotating shaft; 4. electromagnetic drive assembly; 41. permanent magnet; 42. winding coil; 421. disk; 422. winding; 423. winding slot; 43. commutator; 431. sleeve; 432. commutator plate; 433. connecting wing; 5. carbon brush assembly; 51. carbon brush holder; 52. connecting arm; 521. penetration portion; 522. supporting portion; 53. carbon brush; 531. abutment groove; 54. protrusion; 55. groove; 56. stabilizer bar. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] A motor carbon brush assembly with high stability and a motor with the assembly, referring to Figure 1 , comprising a cylindrical outer shell 1 and a bottom cover 2 covering the outer shell 1. One end of the outer shell 1 is open, and the bottom cover 2 is engaged with the outer shell 1, so that the bottom cover 2 opens or closes the opening of the outer shell 1. A rotating shaft 3 is passed through the end of the outer shell 1 away from the bottom cover 2, one end of the rotating shaft 3 extends into the outer shell 1, and the other end extends out of the outer shell 1.

[0035] Reference Figure 2 An electromagnetic drive assembly 4 for driving the rotating shaft 3 to rotate is arranged at one end of the rotating shaft 3 extending into the housing 1 , and a carbon brush assembly 5 for energizing the electromagnetic drive assembly 4 is arranged on the bottom cover 2 .

[0036] Specifically, refer to Figure 2 or Figure 3The electromagnetic drive assembly 4 includes a permanent magnet 41 disposed on the inner wall of the housing 1 and a winding coil 42 sleeved on the rotating shaft 3. The permanent magnet 41 is arranged in an arc shape, and the curvature of the permanent magnet 41 is consistent with the curvature of the inner wall of the housing 1. The permanent magnet 41 is clamped on the housing 1. There are two permanent magnets 41, and the two permanent magnets 41 are relatively distributed, and the magnetic poles of the two permanent magnets facing each other are opposite.

[0037] Reference Figure 2 or Figure 3 The winding coil 42 includes a plurality of discs 421 and a winding 422 wound on the discs 421. The discs 421 are provided with winding slots 423, which penetrate the upper and lower surfaces of the discs 421. There are three winding slots 423, which are evenly spaced along the circumferential direction of the discs 421. The plurality of discs 421 are mutually aligned and stacked to form a disc group, which is sleeved at one end of the rotating shaft 3 extending into the housing 1. The coil is wrapped around the disc group and is located in the winding slots 423 of the plurality of discs 421.

[0038] The disk 421 is a silicon steel sheet, which has high magnetic permeability, low hysteresis loss, high resistivity and low iron loss. Among them, the high resistivity is conducive to limiting the generation of eddy currents, thereby reducing eddy current losses, and the low magnetic permeability is also conducive to reducing iron losses and reducing magnetic flux losses.

[0039] Continue to refer to Figure 2 or Figure 3 The rotating shaft 3 is also provided with a commutator 43, which includes a sleeve 431 provided on the rotating shaft 3 and three commutator plates 432 provided on the sleeve 431. The commutator plates 432 are provided in an arc shape, and the curvature of the commutator plates 432 is consistent with the curvature of the outer arm of the sleeve 431. The three commutator plates 432 are arranged at equal intervals along the circumferential direction of the sleeve 431. A connecting wing 433 is provided at one end of the commutator plate 432 close to the winding 422, and the connecting wing 433 is clamped with the winding 422, so that when the commutator plate 432 is energized, the electric energy is transported from the commutator plate 432 to the connecting wing 433, and then transmitted to the winding coil 42 through the connecting wing 433.

[0040] During operation, the commutator plate 432 is energized through the carbon brush assembly 5, and the electric energy is transported from the commutator plate 432 to the connecting wing 433, and then transmitted to the winding coil 42 through the connecting wing 433. Therefore, when the winding 422 is energized, the magnetic field of the winding coil 42 is generated, and the magnetic field generated by the winding coil 42 interacts with the magnetic field of the permanent magnet 41, thereby generating a torque to drive the winding coil 42 to rotate, thereby driving the rotating shaft 3 to rotate.

[0041] Specifically, refer to Figure 4 or Figure 5The carbon brush assembly 5 includes a carbon brush holder 51 disposed on the bottom cover 2 , a connecting arm 52 disposed on the carbon brush holder 51 , and a carbon brush 53 disposed on the connecting arm 52 .

[0042] Reference Figure 2 or Figure 3 The carbon brush holder 51 is arranged in a square shape, and two carbon brush holders 51 are arranged opposite to each other. The connecting arm 52 is arranged through the carbon brush holder 51, and the connecting arm 52 is made of a metal material with good electrical conductivity. In this embodiment, the connecting arm 52 is made of a copper alloy, which has high electrical conductivity and mechanical strength, and is conducive to making the connecting arm 52 have good electrical contact and stable working performance.

[0043] Continue to refer to Figure 2 or Figure 3 The connecting arm 52 includes a penetration portion 521 and a support portion 522. The penetration portion 521 is in the shape of a long strip plate. The penetration portion 521 is distributed along the length direction of the housing 1. Both ends of the penetration portion 521 extend out of the carbon brush holder 51. One end of the penetration portion 521 located outside the bottom shell is used to connect to the power supply. The other end of the penetration portion 521 is close to the commutator 43 and connected to one end of the support portion 522. The support portion 522 is perpendicular to the penetration portion 521, and the support portion 522 is also arranged in an arc shape. The carbon brush 53 is penetrated at one end of the support portion 522 away from the penetration portion 521, and both ends of the carbon brush 53 extend out of the support portion 522.

[0044] Reference Figure 2 or Figure 3 There are two connecting arms 52 corresponding to the number of carbon brush holders 51, and the two connecting arms 52 are arranged on the two carbon brush holders 51 in a one-to-one manner. The two connecting arms 52 are also arranged opposite to each other. There are two carbon brushes 53 corresponding to the number of connecting arms 52, and the two carbon brushes 53 are passed through the two connecting arms 52 in a one-to-one manner. The two carbon brushes 53 are also arranged opposite to each other.

[0045] Reference Figure 2 or Figure 3 An arc-shaped abutment groove 531 is provided on the side facing each other of the two carbon brushes 53. The abutment groove 531 corresponds to the shape of the outer wall of the commutator plate 432. The abutment groove 531 abuts against the commutator plate 432. When power is turned on, electrical energy is transported to the carbon brush 53 through the connecting arm 52, then to the commutator plate 432 through the carbon brush 53, and finally to the winding 422 through the commutator plate 432. Thus, the magnetic field generated by the winding coil 42 interacts with the magnetic field of the permanent magnet 41, driving the winding coil 42 to rotate, thereby driving the commutator 43 to rotate.

[0046] Reference Figure 2 or Figure 3In order to prevent the carbon brush 53 from shaking slightly when the commutator 43 rotates, causing the connecting arm 52 to shake and affecting the stability of the conduction, a protrusion 54 is also provided on the penetration portion 521 of the connecting arm 52, and the protrusion 54 is arranged in a circular shape. The carbon brush holder 51 is provided with a groove 55 corresponding to the protrusion 54, and the shape of the groove 55 is opened corresponding to the shape of the protrusion 54, so that the connecting arm 52 is plugged and matched with the carbon brush holder 51, so that the connecting arm 52 is installed on the carbon brush holder 51, which is conducive to preventing the connecting arm 52 from shaking forward and backward along the length direction of the penetration portion 521.

[0047] Reference Figure 2 or Figure 3 A stabilizing rod 56 is also provided on the side of the bottom cover 2 facing the inside of the housing 1. One end of the stabilizing rod 56 is connected to the bottom cover 2, and the other end of the stabilizing rod 56 is provided in a U shape. One end of the stabilizing rod 56 in the U shape abuts against the supporting portion 522 of the connecting arm 52. Two stabilizing rods 56 are provided corresponding to the number of carbon brushes 53. The two stabilizing rods 56 are distributed along the direction in which the two carbon brushes 53 face each other, and the side of the carbon brushes 53 facing away from each other extends into the U shape of the stabilizing rod 56. Therefore, when the commutator 43 rotates, the supporting arm is supported by the stabilizing rod 56 to prevent the carbon brushes 53 and the supporting arm from shaking, so as to facilitate more stable current transmission.

[0048] During operation, by connecting the power source to the end of the bottom of the penetration portion 521 located outside the shell, the electric energy is transported to the carbon brush 53 through the connecting arm 52, transported to the commutator plate 432 through the carbon brush 53, and transported to the winding 422 through the commutator plate 432, so that the magnetic field generated by the winding coil 42 interacts with the magnetic field of the permanent magnet 41, driving the winding coil 42 to rotate, thereby driving the commutator 43 to rotate.

[0049] The implementation principle of the present application is: when working, the end of the penetration portion 521 located outside the shell is connected to the power supply, and the electric energy is transported to the carbon brush 53 through the connecting arm 52, and then transported to the commutation plate 432 through the carbon brush 53, and then transported to the winding 422 through the commutation plate 432, so that the magnetic field generated by the winding coil 42 interacts with the magnetic field of the permanent magnet 41 to drive the winding coil 42 to rotate, thereby generating a torque to drive the winding coil 42 to rotate, thereby driving the rotating shaft 3 to rotate, so as to realize the motor function.

[0050] The plug-in fit between the protrusion 54 and the groove 55 helps prevent the connecting arm 52 from shaking back and forth. The stabilizing rod 56 supports the support arm to prevent the carbon brush 53 and the support arm from shaking, allowing the carbon brush 53 to better abut against the commutation plate 432 for more stable current transmission.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A motor carbon brush assembly with high stability and a motor with the assembly, comprising a housing (1) and a bottom cover (2) covering the housing (1), characterized in that: A rotating shaft (3) is provided at one end of the housing (1) away from the bottom cover (2); one end of the rotating shaft (3) extends into the housing (1) and the other end extends out of the housing (1); an electromagnetic drive component (4) for driving the rotating shaft (3) to rotate is provided at the end of the rotating shaft (3) extending into the housing (1); and a carbon brush component (5) for energizing the electromagnetic drive component (4) is provided on the bottom cover (2); The carbon brush assembly (5) comprises a carbon brush holder (51) arranged on the bottom cover (2), a connecting arm (52) arranged on the carbon brush holder (51), and a carbon brush (53) arranged on the connecting arm (52); the connecting arm (52) comprises a penetration portion (521) and a support portion (522); the penetration portion (521) is penetrated by the carbon brush holder (51); both ends of the penetration portion (521) extend out of the carbon brush holder (51); one end of the penetration portion (521) located outside the bottom shell is used for connecting to a power source; the other end of the penetration portion (521) is connected to one end of the support portion (522); the carbon brush (53) is penetrated by the support portion (522) and is away from the penetration portion (521). ), both ends of the carbon brush (53) extend out of the support portion (522), one side of the carbon brush (53) abuts against the electromagnetic drive component (4), a protrusion (54) is also provided on the penetration portion (521) of the connecting arm (52), a groove (55) is provided on the carbon brush holder (51) corresponding to the protrusion (54), the shape of the groove (55) is opened corresponding to the shape of the protrusion (54), the connecting arm (52) is plugged into the carbon brush holder (51), and a stabilizing rod (56) is also provided on the side of the bottom cover (2) facing the inside of the housing (1), one end of the stabilizing rod (56) is connected to the bottom cover (2), and the other end of the stabilizing rod (56) abuts against the support portion (522).

2. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 1, characterized in that: The connecting arm (52) is made of a metal material with good electrical conductivity, and the connecting arm (52) comprises a copper alloy material.

3. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 1, characterized in that: One end of the stabilizing rod (56) abuts against the supporting portion (522) and is arranged in a U shape, and the side of the carbon brush (53) facing away from the electromagnetic drive component (4) extends into the U shape of the stabilizing rod (56).

4. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 1, characterized in that: The electromagnetic drive assembly (4) comprises a permanent magnet (41) arranged on the inner wall of the housing (1) and a winding coil (42) sleeved on the rotating shaft (3); the permanent magnet (41) is clamped on the housing (1); two permanent magnets (41) facing each other are arranged with opposite magnetic poles; the winding coil (42) is located between the two permanent magnets facing each other; a commutator (43) is also sleeved on the rotating shaft (3); the carbon brush (53) abuts against the commutator (43); and one end of the commutator (43) away from the carbon brush (53) is clamped on the winding coil (42).

5. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 4, characterized in that: Two permanent magnets (41) are provided, the two permanent magnets (41) are distributed relative to each other, and the magnetic poles of the two permanent magnets facing each other are opposite.

6. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 4, characterized in that: The winding coil (42) comprises a plurality of discs (421) and a winding (422) wound on the discs (421); the plurality of discs (421) are mutually aligned and stacked to form a disc group; the disc group is sleeved on one end of the rotating shaft (3) extending into the housing (1); and the coil is wound around the disc group.

7. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 6, characterized in that: The disc (421) comprises a silicon steel sheet.

8. A motor carbon brush assembly with high stability and a motor with the assembly according to claim 4, characterized in that: The commutator (43) comprises a sleeve (431) sleeved on the rotating shaft (3) and a plurality of commutator plates (432) arranged on the sleeve (431); the plurality of commutator plates (432) are arranged at equal intervals along the circumferential direction of the sleeve (431); a connecting wing (433) is provided at one end of the commutator plate (432) close to the winding (422); and the connecting wing (433) is clamped with the winding (422).

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