Brush motor

Abstract

The invention, which relates to the technical field of the motor, discloses a brush motor comprising a conductive assembly and a lubricating assembly. The conductive assembly comprises motor brush wires and a motor commutator, and the motor brush wires are in contact with the motor commutator; the lubricating assembly comprises a flow guide part and an oil storage area, the oil storage area is provided with an oil injection hole, one end of the flow guide part makes contact with the motor brush wires, the other end of the flow guide part is located in the oil storage area, the oil storage area communicates with an air inlet channel, and an air inlet of the air inlet channel faces the motor commutator. According to the application, the lubricating oil in the oil storage area is guided to the contact surface of the motor brush wire and the motor commutator through the flow guide piece, and the gas pressure generated by rotation of the motor commutator is utilized to push the lubricating oil in the oil storage area to flow towards the direction of the flow guide piece through the gas inlet channel; the long-term effective lubricating effect of the lubricating oil in the brush motor is achieved, the friction loss of the brush motor is reduced, the service life of the brush motor is prolonged, and the conversion efficiency of the brush motor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and more specifically, to a brushed motor. Background Art

[0002] The motor brushes in the brushed motor will generate friction loss when in contact with the motor commutator, which not only increases maintenance costs but also limits the service life of the motor. In addition, the contact resistance between the motor brushes and the commutator is large, which causes the motor to generate a lot of heat during operation, thereby increasing the energy consumption of the motor and may also affect the performance and life of the motor. The contact resistance and friction loss between the motor brushes and the commutator will reduce the energy conversion efficiency of the brushed motor.

[0003] In order to reduce the friction loss generated by the motor brush wire in the process of contacting the motor commutator, high-viscosity lubricating oil is usually applied to the motor brush wire at one time. However, as the motor runs, the lubricating oil will be separated from the contact area between the motor brush wire and the motor commutator, and cannot play a long-term and effective lubrication role, which limits the reduction of the friction loss generated by the motor brush wire in the process of contacting the motor commutator.

[0004] Therefore, how to achieve long-term and effective lubrication of the lubricating oil in the brush motor and reduce the friction loss of the brush motor has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a brush motor so that the lubricating oil can play a long-term and effective lubricating role in the brush motor and reduce the friction loss of the brush motor.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A brushed motor, comprising:

[0008] A conductive component, wherein the conductive component includes a motor brush and a rotatable motor commutator, and the motor brush contacts the motor commutator;

[0009] A lubrication assembly, the lubrication assembly comprising a guide member and an oil storage area for storing lubricating oil, the oil storage area being provided with an oil filling hole, one end of the guide member being in contact with the motor brush wire, the other end of the guide member being located in the oil storage area, so that the guide member guides the lubricating oil in the oil storage area to the contact surface between the motor brush wire and the motor commutator, and the oil storage area being connected to an air intake channel, the air intake of the air intake channel being arranged in the direction of the motor commutator.

[0010] Optionally, in the above-mentioned brushed motor, the guide member includes a wetting strip, and the oil storage area is provided with at least two baffles, and the baffles are staggered to form a maze space for installing the wetting strip between two adjacent baffles, and the wetting strip is installed in the maze space.

[0011] Optionally, in the above-mentioned brushed motor, the oil storage area is provided with an oil outlet, the wetting strip is passed through the oil outlet, and the distance between the oil outlet and the labyrinth space is 10 μm to 100 μm.

[0012] Optionally, in the above-mentioned brushed motor, a bending portion is provided at the end of the motor brush wire that contacts the motor commutator, the bending portion is bent in a direction away from the motor commutator, and the opening direction of the air inlet is opposite to the bending direction of the bending portion.

[0013] Optionally, the above-mentioned brushed motor further includes a motor base, and the conductive component and the lubricating component are both arranged on the motor base.

[0014] Optionally, in the above-mentioned brushed motor, the motor base has a mounting groove for mounting the motor brush wire, and at least part of the motor brush wire is located in the mounting groove.

[0015] Optionally, in the above-mentioned brushed motor, the air intake passage is connected to the oil storage area through at least one bend.

[0016] Optionally, in the above-mentioned brushed motor, the air intake channel is a long and narrow structure, and the width of the air intake channel is 10 μm to 100 μm.

[0017] Optionally, in the above-mentioned brushed motor, the motor brush wires include a plurality of coplanarly arranged metal wires, the diameter of the metal wires is 0.05 mm to 0.5 mm, and the interval between two adjacent metal wires is 5 μm to 20 μm.

[0018] Optionally, in the above-mentioned brushed motor, there are two motor brushes, and the two motor brushes are centrally symmetrically distributed along the motor commutator, and the lubrication assembly is adapted to the motor brushes.

[0019] The brushed motor provided by the present application is in contact with the motor brush wire of the conductive component through one end of the guide member of the lubricating component, and the other end is located in the oil storage area of ​​the lubricating component, so as to guide the lubricating oil in the oil storage area to the contact surface between the motor brush wire and the motor commutator, thereby reducing the friction loss caused by the contact between the motor brush wire and the motor commutator. At the same time, an air intake channel is arranged in the oil storage area, and the air inlet of the air intake channel is arranged in the direction of the motor commutator. When the brushed motor is working, the motor commutator rotates, so that the gas pressure generated by the rotation of the motor commutator pushes the lubricating oil in the oil storage area to flow toward the guide member through the air intake channel, so that the contact surface between the motor brush wire and the motor commutator can be lubricated by the guide member; when the brushed motor stops working, the air intake pressure of the air intake channel decreases, the flow of the lubricating oil toward the guide member stops, and the guide member stops lubricating the contact surface between the motor brush wire and the motor commutator.

[0020] As can be seen from the above examples, the brushed motor provided by the present application can guide the lubricating oil in the oil storage area to the contact surface between the motor brush wire and the motor commutator through the guide piece, so as to achieve the effect of lubricating the contact surface between the motor brush wire and the motor commutator, and reduce the friction loss caused by the contact between the motor brush wire and the motor commutator. At the same time, the gas pressure generated by the rotation of the motor commutator can be used to push the lubricating oil in the oil storage area to flow toward the guide piece through the air inlet channel, so that the lubricating oil can be added once to achieve a long-term and effective lubrication effect in the brushed motor, effectively reduce the heat of the brushed motor, reduce the friction loss and friction coefficient of the brushed motor, increase the smoothness of movement, extend the life of the brushed motor, and improve the conversion efficiency of the brushed motor.

[0021] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 A schematic diagram of the structure of a brushless motor provided in an embodiment of the present application;

[0024] Figure 2 A cross-sectional view of a brushed motor provided in an embodiment of the present application.

[0025] Among them, 100 is a brush motor, 10 is a conductive component, 20 is a lubrication component, and 30 is a motor base;

[0026] 11 is a motor brush, 111 is a bending portion, and 12 is a motor commutator;

[0027] 21 is a flow guide, 211 is a wetting strip, 22 is an oil storage area, 221 is an air inlet channel, 2211 is an air inlet, 222 is a baffle, 2221 is a maze space, 223 is an oil outlet, and 224 is an oil filling hole;

[0028] 31 is a mounting groove. DETAILED DESCRIPTION

[0029] The core of the present application is to provide a brush motor so as to enable the lubricating oil to play a long-term and effective lubricating role in the brush motor and reduce the friction loss of the brush motor.

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] A brushed motor generally consists of a stator, a rotor, motor brushes, and a motor commutator. When a DC power source is applied to the motor commutator through the motor brushes, current flows into the rotor winding to generate armature current. The magnetic field generated by this current interacts with the stator magnetic field to generate electromagnetic torque, driving the rotor to rotate. As the rotor rotates, the commutator continuously changes the direction of the current so that the rotor magnetic field always interacts with the stator magnetic field, maintaining the continuous rotation of the motor.

[0032] When a brushed motor is working, the motor brush wire will generate friction loss when it contacts the motor commutator, which not only increases the maintenance cost, but also limits the service life of the motor. In addition, the contact resistance between the motor brush wire and the motor commutator is large, which causes the motor to generate a lot of heat during operation, thereby increasing the energy consumption of the motor and may also affect the performance and life of the motor. The contact resistance and friction loss between the motor brush wire and the commutator will lead to a decrease in the energy conversion efficiency of the brushed motor.

[0033] In order to reduce the friction loss generated by the motor brush wire in the process of contacting the motor commutator, high-viscosity lubricating oil is usually applied to the motor brush wire at one time. However, as the motor runs, the lubricating oil will be separated from the contact area between the motor brush wire and the motor commutator, and cannot play a long-term and effective lubrication role, which limits the reduction of the friction loss generated by the motor brush wire in the process of contacting the motor commutator.

[0034] For this reason, Figure 1 As shown, the embodiment of the present application discloses a brushed motor 100, including a conductive component 10 and a lubricating component 20. The lubricating oil in the oil storage area 22 is guided to the contact surface between the motor brush wire 11 and the motor commutator 12 through the guide member 21, and the gas pressure generated by the rotation of the motor commutator 12 is used to push the lubricating oil in the oil storage area 22 to flow toward the guide member 21 through the air inlet channel 221, so that the lubricating oil can be added once to achieve a long-term and effective lubrication effect in the brushed motor 100, reduce the friction loss and friction coefficient of the brushed motor 100, extend the life of the brushed motor 100, and improve the conversion efficiency of the brushed motor 100.

[0035] The following will be combined Figure 1 and Figure 2 The brushed motor 100 disclosed in the embodiment of the present application is specifically explained and illustrated.

[0036] like Figure 1 As shown, the brushed motor 100 includes a motor base 30 , and the conductive component 10 and the lubricating component 20 may both be disposed on the motor base 30 .

[0037] Among them, Figure 1 As shown, the conductive component 10 may include a motor brush 11 and a rotatable motor commutator 12, and the motor brush 11 is in contact with the motor commutator 12. When the brushed motor 100 supplies direct current to the motor brush 11, the motor brush 11 introduces the direct current to the motor commutator 12, and the motor commutator 12 introduces the electric energy to the rotor coil, so that the motor commutator 12 rotates under the action of the electromagnetic field, so that the rotor magnetic field can always interact with the stator magnetic field, and the brushed motor 100 can be maintained to rotate continuously.

[0038] For example, Figure 1 and Figure 2 As shown, a mounting groove 31 for mounting the motor brush 11 is formed on the motor base 30, and at least a portion of the motor brush 11 is located in the mounting groove 31, that is, a partial area of ​​the motor brush 11 is located in the mounting groove 31 to fix the motor brush 11, and at the same time, a partial area of ​​the motor brush 11 is located outside the mounting groove 31 and contacts with the motor commutator 12 to conduct current to the motor commutator 12.

[0039] In order to reduce the friction loss of the brushed motor 100, as Figure 1 As shown, the lubrication assembly 20 may include a guide 21 and an oil storage area 22, and the oil storage area 22 may store lubricating oil. One end of the guide 21 contacts the motor brush 11, and the other end of the guide 21 is located in the oil storage area 22, so as to guide the lubricating oil in the oil storage area 22 to the contact surface between the motor brush 11 and the motor commutator 12, thereby achieving the effect of lubricating the contact surface between the motor brush 11 and the motor commutator 12, and reducing the friction loss generated by the contact between the motor brush 11 and the motor commutator 12. At the same time, the oil storage area 22 is connected to the air inlet channel 221, and the air inlet 2211 of the air inlet channel 221 is arranged in the direction of the motor commutator 12, so that the gas pressure generated by the rotation of the motor commutator 12 pushes the lubricating oil in the oil storage area 22 to flow toward the guide 21 through the air inlet channel 221.

[0040] When the brushed motor 100 is working, the motor commutator 12 can rotate, so that the gas pressure generated by the rotation of the motor commutator 12 pushes the lubricating oil in the oil storage area 22 to flow toward the flow guide 21 through the air inlet channel 221, thereby achieving the effect of lubricating the contact surface between the motor brush 11 and the motor commutator 12 through the flow guide 21; when the brushed motor 100 stops working, the pressure at the air inlet 2211 of the air inlet channel 221 decreases, the flow of the lubricating oil toward the flow guide 21 stops, and the flow guide 21 stops lubricating the contact surface between the motor brush 11 and the motor commutator 12.

[0041] like Figure 1 and Figure 2 As shown, an oil filling hole 224 is also provided in the oil storage area 22, so as to inject lubricating oil into the oil storage area 22 through the oil filling hole 224. It should be noted that after the lubricating oil is injected into the oil storage area 22 through the oil filling hole 224, the oil filling hole 224 can be hot-melt sealed to ensure the sealing of the brush motor 100.

[0042] For example, Figure 2 As shown, two motor brushes 11 can be used, and the two motor brushes 11 are distributed symmetrically along the motor commutator 12. At the same time, the lubrication component 20 is adapted to the motor brush 11, that is, there are two lubrication components 20, and the two lubrication components 20 are distributed symmetrically along the motor commutator 12, so that the two lubrication components 20 can provide lubrication effect for the two motor brushes 11 respectively, thereby improving the energy conversion efficiency of the brushed motor 100.

[0043] The brushed motor 100 disclosed in the embodiment of the present application is in contact with the motor brush 11 of the conductive component 10 through one end of the guide member 21 of the lubricating component 20, and the other end is located in the oil storage area 22 of the lubricating component 20, so as to guide the lubricating oil in the oil storage area 22 to the contact surface between the motor brush 11 and the motor commutator 12, thereby reducing the friction loss generated by the contact between the motor brush 11 and the motor commutator 12. At the same time, an air intake channel 221 is provided in the oil storage area 22, and the air inlet 2211 of the air intake channel 221 is provided in the direction of the motor commutator 12. When the brushed motor 100 is working, the motor commutator 12 rotates, so that the gas pressure generated by the rotation of the motor commutator 12 pushes the lubricating oil in the oil storage area 22 to flow toward the flow guide member 21 through the air inlet channel 221, thereby achieving the effect of lubricating the contact surface between the motor brush 11 and the motor commutator 12 through the flow guide member 21; when the brushed motor 100 stops working, the pressure at the air inlet 2211 of the air inlet channel 221 decreases, the flow of the lubricating oil toward the flow guide member 21 stops, and the flow guide member 21 stops lubricating the contact surface between the motor brush 11 and the motor commutator 12.

[0044] The brushed motor 100 disclosed in the embodiment of the present application can guide the lubricating oil in the oil storage area 22 to the contact surface between the motor brush wire 11 and the motor commutator 12 through the guide member 21, so as to achieve the effect of lubricating the contact surface between the motor brush wire 11 and the motor commutator 12, and reduce the friction loss caused by the contact between the motor brush wire 11 and the motor commutator 12. At the same time, the gas pressure generated by the rotation of the motor commutator 12 can be used to push the lubricating oil in the oil storage area 22 to flow toward the guide member 21 through the air inlet channel 221, so that the lubricating oil can play a long-term and effective lubricating role in the brushed motor 100 by filling the lubricating oil once, effectively reducing the heat of the brushed motor 100, reducing the friction loss and friction coefficient of the brushed motor 100, increasing the smoothness of movement, extending the life of the brushed motor 100, and improving the conversion efficiency of the brushed motor 100.

[0045] For example, Figure 1 As shown, the guide member 21 can adopt a wetting strip 211, and part of the wetting strip 211 is located in the oil storage area 22, so that the gas pressure generated by the rotation of the motor commutator 12 pushes the lubricating oil in the oil storage area 22 to flow toward the wetting strip 211 through the air inlet channel 221, so that the capillary effect of the wetting strip 211 can be used to transfer the lubricating oil to the motor brush 11, and flow into the contact surface between the motor brush 11 and the motor commutator 12, thereby achieving the effect of lubricating the motor brush 11 and the motor commutator 12, and reducing the friction loss caused by the contact between the motor brush 11 and the motor commutator 12.

[0046] like Figure 1 and Figure 2As shown in the figure, an oil outlet 223 is provided in the oil storage area 22, and the wicking strip 211 passes through the oil outlet 223 so that the wicking strip 211 can contact the motor brush wire 11. At the same time, at least two baffles 222 can be provided in the oil storage area 22, that is, the number of baffles 222 can be two, three or more, and the respective baffles 222 are staggeredly distributed to form a labyrinth space 2221 for installing the wicking strip 211 between two adjacent baffles 222. The wicking strip 211 can be installed in the labyrinth space 2221 so that the wicking strip 211 is repeatedly bent and squeezed, thereby effectively preventing lubricating oil from overflowing and making the wicking strip 211 firmly fixed.

[0047] Exemplarily, as Figure 2 shown in the figure, two baffles 222 can be provided in the oil storage area 22, and the two baffles 222 are staggeredly distributed. At the same time, a labyrinth space 2221 is formed between the two baffles 222, and the wicking strip 211 can be installed in the labyrinth space 2221 by bending, so that the wicking strip 211 is repeatedly bent and squeezed. In addition, the distance between the oil outlet 223 and the labyrinth space 2221 can be 10 μm to 100 μm, so that when the brushed motor 100 stops working, the wicking strip 211 can be effectively prevented from overflowing due to being repeatedly bent and squeezed, and the wicking strip 211 can be firmly fixed.

[0048] As Figure 1 shown in the figure, the air inlet passage 221 is a long and narrow structure, and the width of the air inlet passage 221 can be 10 μm to 100 μm. The air inlet passage 221 communicates with the oil storage area 22, and at the same time, the air inlet passage 221 has at least one bend, that is, the air inlet passage 221 can have one bend, or two or more bends to communicate with the oil storage area 22, thereby effectively preventing the problem of lubricating oil overflowing due to surface tension when the brushed motor 100 stops working. It should be noted that the width of the air inlet passage 221 can be determined according to the viscosity and dropping degree of the lubricating oil to ensure that when the brushed motor 100 stops working, the lubricating oil does not overflow due to the surface tension effect.

[0049] As Figure 1 and Figure 2 shown in the figure, a bent portion 111 is provided at the end of the motor brush wire 11 in contact with the motor commutator 12, and the bent portion 111 is bent in a direction away from the motor commutator 12. At the same time, the opening direction of the air inlet 2211 is opposite to the bending direction of the bent portion 111, thereby reducing the risk of wear debris blocking the air inlet 2211.

[0050] Exemplarily, the motor brush wire 11 can be composed of a plurality of coplanar metal wires, and the interval between two adjacent metal wires is between several microns and tens of microns. Optionally, the diameter of the metal wire can be 0.05mm to 0.5mm, and the interval between two adjacent metal wires can be 5μm to 20μm, so as to better play the role of infiltration and capillary channel effect. When the brushed motor 100 is working, the lubricating oil gradually infiltrates the motor brush wire 11, thereby playing a lubricating role, and the temperature of the contact area between the metal wire and the motor commutator 12 gradually increases, which can increase the overall temperature of the oil storage area 22, and also absorb excess ambient heat at high temperature, expand the lubricating oil, and improve the infiltration effect; when the brushed motor 100 stops, the pressure of the air inlet 2211 decreases, the infiltration effect weakens, the ambient temperature decreases, and the infiltration of the lubricating oil is further disconnected, thereby ensuring that the lubricating oil is not exposed.

[0051] The terms "first" and "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brushed motor, characterized in that: include: A conductive component (10), the conductive component (10) comprising a motor brush (11) and a rotatable motor commutator (12), and the motor brush (11) is in contact with the motor commutator (12); A lubrication assembly (20), the lubrication assembly (20) comprising a flow guide (21) and an oil storage area (22) for storing lubricating oil, the oil storage area (22) being provided with an oil filling hole (224), one end of the flow guide (21) being in contact with the motor brush wire (11), the other end of the flow guide (21) being located in the oil storage area (22), so that the flow guide (21) guides the lubricating oil in the oil storage area (22) to the contact surface between the motor brush wire (11) and the motor commutator (12), and the oil storage area (22) is connected to an air intake channel (221), the air intake port (2211) of the air intake channel (221) being arranged in the direction of the motor commutator (12).

2. The brushed motor according to claim 1, characterized in that: The flow guide (21) comprises a wetting strip (211), and the oil storage area (22) is provided with at least two baffles (222), and the baffles (222) are arranged in a staggered manner to form a maze space (2221) for installing the wetting strip (211) between two adjacent baffles (222), and the wetting strip (211) is installed in the maze space (2221).

3. The brushed motor according to claim 2, characterized in that: The oil storage area (22) is provided with an oil outlet (223), the infiltration strip (211) is penetrated through the oil outlet (223), and the distance between the oil outlet (223) and the labyrinth space (2221) is 10 μm to 100 μm.

4. The brushed motor according to claim 1, characterized in that: The end of the motor brush (11) in contact with the motor commutator (12) is provided with a bending portion (111), the bending portion (111) is bent in a direction away from the motor commutator (12), and the opening direction of the air inlet (2211) is opposite to the bending direction of the bending portion (111).

5. The brushed motor according to claim 1, characterized in that: It also comprises a motor base (30), on which the conductive component (10) and the lubricating component (20) are both arranged.

6. The brushed motor according to claim 5, characterized in that: The motor seat (30) has a mounting groove (31) for mounting the motor brush wire (11), and at least a portion of the motor brush wire (11) is located in the mounting groove (31).

7. The brushed motor according to claim 1, characterized in that: The air intake channel (221) is connected to the oil storage area (22) through at least one bend.

8. The brushed motor according to claim 7, characterized in that: The air intake channel (221) is a long and narrow structure, and the width of the air intake channel (221) is 10 μm to 100 μm.

9. The brushed motor according to claim 1, characterized in that: The motor brush wire (11) comprises a plurality of coplanarly arranged metal wires, the diameter of the metal wires is 0.05 mm to 0.5 mm, and the interval between two adjacent metal wires is 5 μm to 20 μm.

10. The brushed motor according to any one of claims 1 to 9, characterized in that: There are two motor brushes (11), and the two motor brushes (11) are centrally symmetrically distributed along the motor commutator (12), and the lubrication assembly (20) is adapted to the motor brushes (11).

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