A silent motor structure that is easy to install

Abstract

The present invention relates to the field of micro-motor technology, and in particular to a silent motor structure that is easy to install, including a motor housing, a magnetic tile is arranged in the motor housing, a motor shaft is arranged in the middle of the motor housing, a rotor is arranged on the motor shaft, an armature winding is wound on the rotor, a commutator is connected to the rotor, an end cover is arranged at one end of the motor housing, carbon brush arms and power terminals are arranged on both sides of the end cover, a conductive terminal is arranged at the top of the carbon brush arm, a screw is connected between the conductive terminal and the carbon brush arm, one end of the carbon brush arm is suspended and provided with a carbon brush, an installation guide angle for inserting a commutator is formed between the two carbon brush arms, a receiving cavity for accommodating a capacitor is arranged inside the end cover, a receiving seat for accommodating the commutator is arranged in the middle of the end cover, and a sealing cover plate is arranged at the bottom of the end cover. The present invention has a compact structure and ingenious design, is flexible and convenient to install, improves structural stability, and has a good silent effect and stable working performance.

Description

Technical Field

[0001] The invention relates to the technical field of micro motors, and in particular to a silent motor structure that is easy to install. Background Art

[0002] Micromotor, full name "micro electric motor", is often used in control systems or transmission mechanical loads to realize functions such as detection, analytical operation, amplification, execution or conversion of electromechanical signals or energy. In the micromotor, the carbon brush is installed to the end cover of the motor through an elastic carbon brush arm. The carbon brush is in friction contact with the commutator of the rotor under the elastic force of the carbon brush arm. The carbon brush arm is a conductor, which is electrically connected to the carbon brush and the conductive terminal installed on the end cover. The external power supply supplies power to the armature winding of the rotor through the conductive terminal, carbon brush arm, carbon brush and commutator in sequence. When the existing micro motor is running, the high-speed rotation of the rotor may cause the rotor and surrounding components such as the commutator and carbon brush arm to vibrate slightly, reducing the structural stability and generating mechanical noise. This will not only greatly affect the connection stability and normal operation of the internal components of the micro motor, but also cause a certain degree of noise pollution. At present, a soundproof box is generally used to isolate the micro motor. Although it can achieve a certain soundproofing effect, the soundproof box is a fixed installation structure. The existing micro motor has a complex structure and is not easy to install. Therefore, it is not convenient to open the soundproof box to operate and maintain the micro motor. The soundproofing effect is not good, which reduces the working performance of the micro motor. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a silent motor structure that is easy to install, has a compact structure and ingenious design, is flexible and convenient to install, improves structural stability, has good silent effect and stable working performance.

[0004] To achieve the above-mentioned purpose, the present invention provides a silent motor structure that is easy to install, including a motor housing, a magnetic shoe is arranged in the motor housing, a motor shaft is arranged in the middle of the motor housing, a rotor is arranged on the motor shaft, the rotor is wound with an armature winding, and the rotor is connected to a commutator. An end cover is arranged at one end of the motor housing, carbon brush arms and power connection terminals are arranged on both sides of the end cover, a conductive terminal is arranged on the top of the carbon brush arm, a screw is connected between the conductive terminal and the carbon brush arm, one end of the carbon brush arm is suspended and is provided with a carbon brush, and an installation guide angle for inserting a commutator is formed between the two carbon brush arms, a receiving cavity for accommodating a capacitor is arranged inside the end cover, a receiving seat for accommodating the commutator is arranged in the middle of the end cover, and a sealing cover plate is arranged at the bottom of the end cover.

[0005] Preferably, a guiding slope is arranged on the outside of the carbon brush.

[0006] Preferably, the carbon brush arm includes an integrally formed end and a connecting portion, the connecting portion is bent toward the end, the end is provided with a mounting hole, the connecting portion is provided with a bayonet, elastic clamping blocks are provided around the bayonet, and the carbon brush is provided with a boss that cooperates with the elastic clamping block.

[0007] Preferably, a capacitor is arranged inside the receiving cavity, and the capacitor includes a core body, and the core body is connected with a first pin and a second pin, the first pin is connected to the power connection terminal, and the second pin is led out to the outside of the end cover.

[0008] Preferably, UV glue is provided at the connection between the carbon brush arm and the end cover.

[0009] Preferably, positioning posts are arranged around the end cover, positioning holes matching the positioning posts are arranged around the sealing cover plate, and bearings connected to the motor shaft are arranged inside the sealing cover plate and at the bottom of the motor housing.

[0010] Preferably, protective edges for isolating the conductive terminal from the magnetic tile and for isolating the conductive terminal from the motor housing are provided at both side edges of the end cover, and the height of the protective edges is greater than the height of the conductive terminal.

[0011] Preferably, the protective edge is arc-shaped and is integrally formed with the outer side surface of the end cover.

[0012] Preferably, the conductive terminal is provided with a first connection hole and a second connection hole, the power connection terminal longitudinally penetrates the end cover through the first connection hole and extends to the outside of the end cover, and the screw is connected to the carbon brush arm on the end cover through the second connection hole.

[0013] Preferably, the carbon brush arm is made of elastic copper alloy.

[0014] Beneficial effects of the present invention: A silent motor structure that is easy to install, comprising a motor housing, a magnetic shoe is arranged in the motor housing, a motor shaft is arranged in the middle of the motor housing, a rotor is arranged on the motor shaft, the rotor is wound with an armature winding, the rotor is connected to a commutator, an end cover is arranged at one end of the motor housing, carbon brush arms and power connection terminals are arranged on both sides of the end cover, a conductive terminal is arranged on the top of the carbon brush arm, a screw is connected between the conductive terminal and the carbon brush arm, one end of the carbon brush arm is suspended and is provided with a carbon brush, an installation guide angle for inserting a commutator is formed between the two carbon brush arms, a receiving cavity for accommodating a capacitor is arranged inside the end cover, a receiving seat for accommodating the commutator is arranged in the middle of the end cover, and a sealing cover plate is arranged at the bottom of the end cover.

[0015] In the micromotor, the magnetic tile is fixedly installed on the inner wall of the motor housing, the motor shaft passes through the motor housing, the motor shaft is connected to the rotor wound with the armature winding, and the rotor is connected to the commutator. When the end cover is installed to the motor housing, the commutator is inserted into the receiving seat of the end cover for positioning and installation. The receiving seat can completely wrap and accommodate the entire commutator, stabilize the working position of the commutator, and also play a good role in sound insulation and silencing. After the commutator is inserted into the end cover, the carbon brush arms on both sides of the end cover are opened by the guide of the installation guide angle. The carbon brush automatically contacts the commutator by friction under the elastic force of the carbon brush arm, so that the commutator can be quickly inserted. The installation is convenient and quick, and the installation guide angle can be selected in the range of 20° to 80°. Since the carbon brush arm is a conductor, it is electrically connected to the carbon brush and the conductive terminal respectively. The external power supply is transmitted to the conductive terminal, the carbon brush arm, the carbon brush, the commutator, and the rotor in sequence through the power connection terminal to supply power to the armature winding of the rotor, thereby driving the micromotor to operate. The idle space inside the end cover is fully utilized, and a receiving chamber is opened inside the end cover. The receiving chamber is used to assemble or disassemble the capacitor, which is flexible and convenient to use. When the capacitor is installed in the receiving chamber, the micromotor can play a role in preventing EMC interference. The receiving chamber is small in size and occupies a small space, and does not affect the normal operation of other components. A sealing cover plate with good sealing performance is provided at the bottom of the end cover. The sealing cover plate and the end cover are interconnected and stably assembled on the micromotor, and have good structural stability and silencing effect. The present invention has a compact structure and ingenious design, is flexible and convenient to install, improves structural stability, and has a good silencing effect and stable working performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the end cover of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the bottom of the end cover of the present invention.

[0019] Figure 4 for Figure 3 Schematic diagram of the top view of the structure after the sealing cover is hidden.

[0020] Figure 5 It is a schematic structural diagram of the conductive terminal of the present invention.

[0021] Figure 6 It is a schematic diagram of the explosion structure between the carbon brush arm and the carbon brush of the present invention.

[0022] Reference numerals include:

[0023] 1——Motor housing 2——Magnetic tile 3——Motor shaft

[0024] 4——Rotor 5——Armature winding 6——Commutator

[0025] 7——End cap

[0026] 71——Carbon brush arm 711——End 712——Connecting part

[0027] 713——Mounting hole 714——Bayonet 715——Elastic block

[0028] 72——Electrical terminal

[0029] 73——conductive terminal 731——first connection hole 732——second connection hole

[0030] 74——Screw

[0031] 75——Carbon brush 751——Guide slope 752——Boss

[0032] 76——Installation guide angle 77——Positioning column

[0033] 8——Capacitor 81——First pin 82——Second pin

[0034] 83——Core

[0035] 9——Accommodation chamber 10——Accommodation seat

[0036] 11——Sealing cover plate 111——Positioning hole

[0037] 12——UV glue 13——Bearing 14——Protect the edge. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 6 As shown, a silent motor structure that is easy to install of the present invention comprises a motor housing 1, wherein a magnetic tile 2 is arranged in the motor housing 1, a motor shaft 3 is arranged in the middle of the motor housing 1, a rotor 4 is arranged on the motor shaft 3, an armature winding 5 is wound around the rotor 4, and a commutator 6 is connected to the rotor 4, an end cover 7 is arranged at one end of the motor housing 1, carbon brush arms 71 and power terminals 72 are arranged on both sides of the end cover 7, a conductive terminal 73 is arranged at the top of the carbon brush arm 71, a screw 74 is connected between the conductive terminal 73 and the carbon brush arm 71, one end of the carbon brush arm 71 is suspended and a carbon brush 75 is arranged, an installation guide angle 76 for inserting the commutator 6 is formed between the two carbon brush arms 71, a receiving cavity 9 for accommodating a capacitor 8 is arranged inside the end cover 7, a receiving seat 10 for accommodating the commutator 6 is arranged in the middle of the end cover 7, and a sealing cover plate 11 is arranged at the bottom of the end cover 7.

[0040] In the micromotor, the magnetic tile 2 is fixedly mounted on the inner wall of the motor housing 1, the motor shaft 3 passes through the motor housing 1, the motor shaft 3 is connected to the rotor 4 wound with the armature winding 5, the rotor 4 is connected to the commutator 6, when the end cover 7 is installed to the motor housing 1, the commutator 6 is inserted into the receiving seat 10 of the end cover 7 for positioning and installation, the receiving seat 10 can completely wrap and accommodate the entire commutator 6, stabilize the working position of the commutator 6, and also play a good sound insulation and silencing role, after the commutator 6 is inserted into the end cover 7, the carbon brush arms 71 on both sides of the end cover 7 are propped open through the guidance of the installation guide angle 76, and the carbon brush 75 automatically rubs against the commutator 6 under the elastic force of the carbon brush arm 71, so that the commutator 6 can be quickly inserted, and the installation is convenient and quick. The optional angle range of the installation guide angle 76 is 20° to 80°. Since the carbon brush arm 71 is a conductor, it is electrically connected to the carbon brush 75 and the conductive terminal 73 respectively. The external power supply is sequentially transmitted to the conductive terminal 73, the carbon brush arm 71, the carbon brush 75, the commutator 6, and the rotor 4 through the power terminal 72, and the armature winding 5 of the rotor 4 is powered, thereby driving the micromotor to operate. The idle space inside the end cover 7 is fully utilized, and a receiving chamber 9 is provided inside the end cover 7. The receiving chamber 9 is used to assemble or disassemble the capacitor 8, which is flexible and convenient to use. When the capacitor 8 is installed in the receiving chamber 9, the micromotor can play a role in preventing EMC interference. The receiving chamber 9 is small in size and occupies a small space, and does not affect the normal operation of other components. A sealing cover plate 11 with good sealing performance is provided at the bottom of the end cover 7. The sealing cover plate 11 is interconnected with the end cover 7 and stably assembled on the micromotor, which has good structural stability and mute effect. The present invention has a compact structure and ingenious design, is flexible and convenient to install, improves structural stability, and has a good mute effect and stable working performance.

[0041] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the carbon brush 75 of this embodiment is provided with a guide bevel 751 on the outside. Specifically, the carbon brush 75 is more convenient to insert the commutator 6 through the guide bevel 751, and the guide bevel 751 and the commutator 6 are better fitted and contacted, the connection is stable and reliable, and the installation is faster and more convenient.

[0042] like Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the carbon brush arm 71 of this embodiment includes an integrally formed end portion 711 and a connecting portion 712, wherein the connecting portion 712 is bent toward the end portion 711, the end portion 711 is provided with a mounting hole 713, the connecting portion 712 is provided with a bayonet 714, and elastic clamping blocks 715 are provided around the bayonet 714, and the carbon brush 75 is provided with a boss 752 that cooperates with the elastic clamping block 715. Specifically, the integrally formed end portion 711 and connecting portion 712 have a compact structure, good structural stability, and a large supporting bearing area. The connecting portion 712 is bent toward the end portion 711 so that the connecting portion 712 is in a suspended state. The carbon brush arm 71 is elastic, and an obtuse angle is formed between the end portion 711 and the connecting portion 712, thereby increasing the range of motion of the connecting portion 712 and providing good adjustment performance, which is conducive to the commutator 6 being inserted into the end cover 7 and actively propping up the connecting portion 712 of the carbon brush arm 71, thereby facilitating the frictional contact between the carbon brush 75 and the commutator 6. The end portion 711 of the carbon brush arm 71 is stably installed on the end cover 7 through the screw 74 and the conductive terminal 73, and the carbon brush 75 is connected to the connecting portion 712 of the carbon brush arm 71. The carbon brush 75 is inserted into the bayonet 714 and then engaged with the elastic block 715 through the boss 752, thereby completing the installation connection between the carbon brush 75 and the carbon brush arm 71.

[0043] like Figure 2 As shown, a capacitor 8 is arranged inside the receiving cavity 9 of the present embodiment, and the capacitor 8 includes a core 83, and the core 83 is connected with a first pin 81 and a second pin 82, wherein the first pin 81 is connected to the power terminal 72, and the second pin 82 is led out to the outside of the end cover 7. Specifically, the receiving cavity 9 is used to assemble or disassemble the capacitor 8, and is flexible and convenient to use. When the capacitor 8 is installed in the receiving cavity 9, the core 83 is connected to the power terminal 72 through the first pin 81, and is led out to the outside of the end cover 7 through the second pin 82. When the end cover 7 is installed on the micro motor, the second pin 82 is conductively connected to the motor shell. Since the motor shell is grounded when the micro motor is in use, the capacitor 8 is also grounded, so that the micro motor meets higher EMC electromagnetic compatibility requirements, the installation layout is reasonable, the structure is simple and compact, and the wave absorbing effect of the capacitor 8 is brought into play.

[0044] like Figure 1 , Figure 2 and Figure 4 As shown, the connection between the carbon brush arm 71 and the end cover 7 of this embodiment is provided with UV glue 12. Specifically, the connection between the carbon brush arm 71 and the end cover 7 is coated with UV glue 12, and the UV glue 12 has a fast curing speed, which can absorb energy and reduce shock, effectively reduce the adverse effects caused by vibration between parts, and can further optimize and improve the mute effect, so that the carbon brush arm 71 can be stably installed on the end cover 7, so that the carbon brush 75 can better fit with the commutator 6, the force is evenly applied, and the abnormal noise is reduced.

[0045] like Figure 3 and Figure 4As shown, the end cover 7 of this embodiment is provided with positioning posts 77 on all sides, the sealing cover plate 11 is provided with positioning holes 111 matching the positioning posts 77 on all sides, and the inside of the sealing cover plate 11 and the bottom of the motor housing 1 are provided with bearings 13 connected to the motor shaft 3. Specifically, the end cover 7 is connected to the positioning holes 111 of the sealing cover plate 11 through the positioning posts 77, so as to realize the installation connection between the end cover 7 and the sealing cover plate 11, and the connection is stable and reliable, and the positioning effect is good. The bearings 13 arranged inside the sealing cover plate 11 and at the bottom of the motor housing 1 are respectively connected to the top and bottom ends of the motor shaft 3, which effectively stabilizes the working position of the motor shaft 3 and improves the working stability of the motor shaft 3.

[0046] like Figure 1 and Figure 2 As shown, the protective edges 14 for isolating the conductive terminal 73 from the magnetic tile 2 and from the motor housing 1 are provided at the edges of both sides of the end cover 7 of this embodiment, and the height of the protective edge 14 is greater than the height of the conductive terminal 73. Specifically, the height of the protective edge 14 is greater than the height of the conductive terminal 73, and the protective edge 14 can effectively isolate the conductive terminal 73 from the magnetic tile 2, so that the distance between the magnetic tile 2 and the conductive terminal 73 is greater than 1 mm. At the same time, the protective edge 14 can effectively isolate the conductive terminal 73 from the motor housing 1, prevent the conductive terminal 73 from contacting with the motor housing 1 and causing arcing and leakage, play an isolation and insulation protection role, and further enable the motor to achieve the purpose of high-voltage resistance without arcing, and the leakage current is less than 5 mA per minute. The structure is compact and the design is reasonable, the insulation protection effect is good, the high-voltage resistance and operation stability are good, and the service life of the motor is extended.

[0047] like Figure 1 and Figure 2 As shown, the protective edge 14 of this embodiment is arc-shaped and is integrally formed with the outer side of the end cover 7. Specifically, the integrally formed protective edge 14 and the outer side of the end cover 7 have a more compact structure, an overall beautiful appearance, and are easy to manufacture. The overall structure is more stable and firm, and has a long service life.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the conductive terminal 73 of this embodiment is provided with a first connection hole 731 and a second connection hole 732, the power terminal 72 longitudinally penetrates the end cover 7 through the first connection hole 731 and extends to the outside of the end cover 7, and the screw 74 is connected to the end cover 7 with the carbon brush arm 71 through the second connection hole 732. Specifically, the power terminal 72 longitudinally penetrates the end cover 7 through the first connection hole 731 and extends to the outside of the end cover 7, so as to realize the positioning of the power terminal 72, so that the power terminal 72 is inserted and installed on the end cover 7, and the connection is stable and reliable. The screw 74 fixes the carbon brush arm 71 to the end cover 7 through the second connection hole 732, and the installation is simple and convenient, and the positioning effect is good.

[0049] like Figure 1 , Figure 2 and Figure 6 As shown, the carbon brush arm 71 of this embodiment is made of an elastic copper alloy. Specifically, the carbon brush arm 71 made of copper alloy has good formability and conductivity, and can be easily produced by a mold to produce carbon brush arms 71 with different specific shapes to match the layout design of the motor end cover 7, and has good compatibility.

[0050] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A silent motor structure that is easy to install, comprising a motor housing, a magnetic tile is arranged in the motor housing, a motor shaft is arranged in the middle of the motor housing, a rotor is arranged on the motor shaft, an armature winding is wound on the rotor, a commutator is connected to the rotor, an end cover is arranged at one end of the motor housing, a carbon brush arm and an electrical terminal are arranged on both sides of the end cover, a conductive terminal is arranged on the top of the carbon brush arm, a screw is connected between the conductive terminal and the carbon brush arm, one end of the carbon brush arm is suspended and provided with a carbon brush, Features: An installation guide angle for inserting the commutator is formed between the two carbon brush arms, a receiving cavity for accommodating a capacitor is provided inside the end cover, a receiving seat for accommodating the commutator is provided in the middle of the end cover, a sealing cover plate is provided at the bottom of the end cover, the carbon brush arm includes an integrally formed end and a connecting portion, the connecting portion is bent toward the end, a mounting hole is provided at the end, a bayonet is provided at the connecting portion, elastic blocks are provided around the bayonet, the carbon brush is provided with a boss that cooperates with the elastic block, positioning columns are provided around the end cover, positioning holes matching the positioning columns are provided around the sealing cover plate, and bearings connected to the motor shaft are provided inside the sealing cover plate and at the bottom of the motor housing.

2. A silent motor structure that is easy to install according to claim 1, Features: A guiding inclined surface is arranged on the outside of the carbon brush.

3. A silent motor structure that is easy to install according to claim 1, Features: A capacitor is arranged inside the receiving cavity. The capacitor includes a core body. The core body is connected with a first pin and a second pin. The first pin is connected to the power terminal, and the second pin is led out to the outside of the end cover.

4. A silent motor structure that is easy to install according to claim 1, Features: The connection between the carbon brush arm and the end cover is provided with UV glue.

5. A silent motor structure that is easy to install according to claim 1, Features: Protective edges for isolating the conductive terminal from the magnetic tile and for isolating the conductive terminal from the motor housing are arranged at both side edges of the end cover, and the height of the protective edges is greater than the height of the conductive terminal.

6. A silent motor structure that is easy to install according to claim 5, Features: The protective edge is arc-shaped and is integrally formed with the outer side surface of the end cover.

7. A silent motor structure that is easy to install according to claim 1, Features: The conductive terminal is provided with a first connection hole and a second connection hole. The power connection terminal longitudinally penetrates the end cover through the first connection hole and extends to the outside of the end cover. The screw is connected to the carbon brush arm on the end cover through the second connection hole.

8. A silent motor structure that is easy to install according to claim 1, Features: The carbon brush arm is made of elastic copper alloy.

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