Motor brush assembly with stable contact

Abstract

The invention relates to the technical field of motor brushes, and provides a stable-contact motor brush assembly which comprises a shell, a commutator, a wiring terminal, a brush assembly, a voltage control assembly and a position adjusting assembly, a permanent magnet is fixedly mounted in the shell, a rotor is rotatably mounted in the shell and located in the permanent magnet, and the commutator is fixedly mounted on the rotor. Two wiring terminals are symmetrically and fixedly installed in the shell, the electric brush assembly is installed in the shell, the pressure control assembly is installed on the electric brush assembly, and the position adjusting assembly is installed in the electric brush assembly. Therefore, the problems of contact stability reduction, contact resistance increase and poor contact between the two are solved.

Description

Technical Field

[0001] The invention relates to the technical field of motor brushes, and in particular to a motor brush assembly with stable contact. Background Art

[0002] Motor brushes, also known as carbon brushes, are devices used to connect the fixed part and the rotating part in rotating machinery such as motors or generators. They are mainly used to transmit current or signals. Brushes are usually made of graphite or other conductive materials. Due to their good conductivity and wear resistance, they can maintain good contact with the slip ring or commutator during rotation to achieve effective transmission of current.

[0003] In electric motors, especially DC motors, brushes also have the important task of commutation. As the motor rotates, the relative position of the brushes and the slip rings will change, thereby changing the direction of the current. This change allows the motor to continue to rotate and maintain stable operation. When running at high speeds, the brushes will be subjected to additional force under the action of centrifugal force, which requires proper adjustment of the contact pressure to ensure stable contact. If it cannot be adjusted reasonably, it will affect the contact stability between the brushes and the slip rings, resulting in increased contact resistance, causing more heat to be generated during the conduction of electrical energy, resulting in energy loss, reducing the efficiency of the motor, and causing problems such as excessive heat generation during operation and poor contact. Summary of the invention

[0004] The present invention provides a motor brush assembly with stable contact, which solves the problem in the prior art that the pressure between the brush and the slip ring is difficult to adjust in real time, resulting in reduced contact stability, increased contact resistance and poor contact between the two.

[0005] The technical solution of the present invention is as follows:

[0006] A contact-stable motor brush assembly comprises a housing, a permanent magnet is fixedly mounted inside the housing, a rotor is rotatably mounted inside the housing, and the rotor is located inside the permanent magnet, and further comprises:

[0007] A commutator, wherein the commutator is fixedly mounted on the rotor;

[0008] Wiring terminals, two of which are symmetrically and fixedly installed inside the housing;

[0009] A brush assembly, the brush assembly being installed inside the housing and used for transmitting current;

[0010] A pressure control assembly, the pressure control assembly is installed on the brush assembly and is used to control the pressure between the brush assembly and the commutator;

[0011] A position adjustment component is installed inside the brush assembly and is used to adjust the position of the brush assembly.

[0012] On the basis of the above scheme, the brush assembly comprises:

[0013] A mounting frame, the mounting frame is fixedly mounted inside the housing, and the mounting frame is located at the bottom of the wiring terminal;

[0014] A sliding frame, wherein two sliding frames are symmetrically and slidably mounted on the mounting frame, and the two sliding frames are staggered with the two wiring terminals respectively;

[0015] A sliding frame, wherein the sliding frame is slidably mounted inside the two sliding frames;

[0016] A brush rod, wherein the brush rod is slidably mounted inside the two sliding frames;

[0017] A brush head, the two brush rods are detachably mounted with the brush head, and the brush head is adapted to the commutator;

[0018] A conductive part is mounted on the connecting terminal and is used for conducting electricity.

[0019] On the basis of the above solution, the conductive part includes:

[0020] Insulating pads, two insulating pads are symmetrically and fixedly installed inside the shell, and the two insulating pads correspond to the two sliding frames one by one;

[0021] Conductors, both of the two wiring terminals are electrically connected to conductors;

[0022] A conductive tube, wherein the two insulating pads are fixedly installed with the conductive tube, and the two conductive wires are electrically connected to the two conductive tubes respectively;

[0023] A first spring is fixedly mounted on the two insulating pads, and the first spring is fixedly connected to the rear end of the sliding frame.

[0024] In addition to the above solutions, it also includes:

[0025] Insulating rings, the tails of the two sliding frames are fixedly mounted with the insulating rings;

[0026] A first conductive rod, wherein the first conductive rod is fixedly installed inside the two insulating rings, and one end of the first conductive rod slides with the conductive cylinder and is electrically connected;

[0027] An insulating frame, wherein the insulating frame is fixedly installed inside the two sliding frames;

[0028] Conductor, a plurality of the conductors are fixedly installed in the two insulating frames in a circular shape at equal angles, and the conductors slide and are electrically connected to the other end of the first conductive rod;

[0029] A second conductive rod, the two brush heads are fixedly mounted with the second conductive rod, the second conductive rod is slidably connected to the insulating frame, and the second conductive rod is slidably and electrically connected to the conductor.

[0030] Based on the above solution, the pressure control component includes:

[0031] A driven helical gear, on which the two insulating frames are rotatably mounted;

[0032] A first screw, the two driven helical gears are both fixedly mounted with the first screw, the first screw is a hollow structure, and the first screw is rotatably connected to the insulating frame;

[0033] A first nut, wherein the first nut is threadedly sleeved on the two first screw rods;

[0034] A sliding cylinder, on which the two first nuts are fixedly mounted;

[0035] A displacement frame, wherein the displacement frame is slidably mounted inside the two sliding frames, and the displacement frame is fixedly connected to the sliding cylinder;

[0036] A second spring, the second spring is fixedly mounted on the two displacement frames, and the second spring is fixedly connected to the brush rod;

[0037] A driving bevel gear, the driving bevel gear is rotatably mounted on the inner top walls of the two sliding frames, and the driving bevel gear is meshed with the driven bevel gear;

[0038] A driving part is installed on both of the two sliding frames and is used to adjust the positions of the displacement frame and the brush rod.

[0039] On the basis of the above scheme, the driving unit comprises:

[0040] A rotating disk, the rotating disk is rotatably mounted on the top of the two sliding frames, and the rotating disk is fixedly connected to the driving bevel gear;

[0041] A knob is slidably mounted on the two rotating disks.

[0042] In addition to the above solutions, it also includes:

[0043] A third spring, the third spring is fixedly installed between the rotating disk and the knob;

[0044] An upper docking plate, on the inner top walls of the two knobs the upper docking plate is fixedly mounted;

[0045] A lower docking plate is fixedly mounted on the top walls of the two rotating plates, and the lower docking plate is adapted to the upper docking plate.

[0046] On the basis of the above scheme, the positioning component includes:

[0047] Position adjustment frames, the two sides of the two sliding frames are fixedly mounted with the position adjustment frames;

[0048] A pushing part, the pushing part is installed inside the positioning frame and is used to drive the sliding frame to move inside the sliding frame;

[0049] The transmission part is installed inside the positioning frame and is used for transmitting power.

[0050] On the basis of the above scheme, the pushing part comprises:

[0051] Second screws, two of which are rotatably mounted inside the four position adjustment frames;

[0052] A second nut, on which the four second screw rods are fixedly mounted;

[0053] A slider is slidably mounted on both sides of the two sliding frames, and the four sliders are fixedly connected to the four second nuts respectively.

[0054] On the basis of the above scheme, the transmission part includes:

[0055] A first gear, wherein the first gear is rotatably mounted inside each of the four position adjustment frames, and the first gear is fixedly connected to the second screw rod;

[0056] A second gear, wherein the second gear is rotatably mounted inside each of the four positioning frames, and the second gear is meshed with the first gear;

[0057] A joint is rotatably mounted on each of the four position adjustment frames, and the joint is fixedly connected to the second gear.

[0058] The working principle and beneficial effects of the present invention are:

[0059] 1. In the present invention, when the rotor is running, the brush will be worn, and the first spring will be deformed at this time, so that the brush head and the commutator always maintain stable contact. At the same time, during the deformation of the first spring, a certain relative movement will occur between the conductive cylinder and the first conductive rod, which will not affect the normal conductive process, making the working process more stable.

[0060] 2. In the present invention, as the pressure of the first spring is released, the thrust of the first spring will gradually decrease. When the thrust of the first spring is less than the critical point of the second spring releasing the pressure, the second spring can still start to release the pressure when the first spring has not completely returned to its original position, thereby maintaining stable contact between the brush and the commutator, stabilizing the pressure, and reducing the number of maintenance times.

[0061] 3. In the present invention, the knob rotates along the circumference of the rotating disk, and the rotating disk can be driven to rotate through the connection between the upper docking disk and the lower docking disk, thereby driving the active bevel gear to rotate. When no adjustment is required, under the action of the third spring, the upper docking disk and the lower docking disk are in a separated state. At this time, the rotation of the knob will not drive the rotating disk to rotate, reducing the possibility of accidental touch during the adjustment process.

[0062] 4. In the present invention, the setting of the brush assembly does not affect the transmission of current when adjusting the point position, ensuring the adjustment accuracy and safety. The setting of the pressure control assembly accurately controls the pressure between the brush head and the commutator, avoiding poor contact caused by excessive or insufficient pressure, extending the service life of the equipment, and improving the overall operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0065] Figure 2 It is a schematic diagram of a three-dimensional structure in cross section in the present invention;

[0066] Figure 3 It is a cross-sectional structural schematic diagram of the coordination of the brush assembly and the voltage control assembly in the present invention;

[0067] Figure 4 It is a schematic cross-sectional structure diagram of the conductive part in the present invention;

[0068] Figure 5 It is a cross-sectional structural diagram of the cooperation between the pressure control assembly and the driving part in the present invention;

[0069] Figure 6 It is a schematic cross-sectional structural diagram of the pressure control assembly in the present invention;

[0070] Figure 7 It is a cross-sectional structural schematic diagram of the driving part in the present invention;

[0071] Figure 8 It is a schematic cross-sectional structural diagram of the position adjustment component in the present invention.

[0072] In the figure: 1, housing; 2, permanent magnet; 3, rotor; 4, commutator; 5, terminal; 6, mounting frame; 7, sliding frame; 8, sliding frame; 9, brush rod; 10, brush head; 11, insulating pad; 12, wire; 13, conductive cylinder; 14, first spring; 15, insulating ring; 16, first conductive rod; 17, insulating frame; 18, conductor; 19, second conductive rod; 20, driven bevel gear; 21, first screw; 22, first nut; 23, sliding cylinder; 24, displacement frame; 25, second spring; 26, active bevel gear; 27, rotating disk; 28, knob; 29, third spring; 30, upper docking disk; 31, lower docking disk; 32, adjustment frame; 33, second screw; 34, second nut; 35, slider; 36, first gear; 37, second gear; 38, joint. DETAILED DESCRIPTION

[0073] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] like Figures 1 to 8 As shown, this embodiment proposes a contact-stable motor brush assembly, including a housing 1, a permanent magnet 2 is fixedly installed inside the housing 1, a rotor 3 is rotatably installed inside the housing 1, and the rotor 3 is located inside the permanent magnet 2. It also includes a commutator 4, a terminal 5, a brush assembly, a voltage control assembly and a position adjustment assembly. The commutator 4 is fixedly installed on the rotor 3, two terminal 5 are symmetrically and fixedly installed inside the housing 1, the brush assembly is installed inside the housing 1 for transmitting current, and the brush assembly includes a mounting frame 6, a sliding frame 7, and a sliding frame 8. , brush rods 9, brush heads 10 and conductive parts, the mounting frame 6 is fixedly installed inside the housing 1, the mounting frame 6 is located at the bottom of the terminal 5, two sliding frames 7 are symmetrically and slidably installed on the mounting frame 6, the two sliding frames 7 are staggered with the two terminal blocks 5 respectively, and sliding frames 8 are slidably installed inside the two sliding frames 7, and brush rods 9 are slidably installed inside the two sliding frames 8. Brush heads 10 are detachably installed on the two brush rods 9, and the brush heads 10 are adapted to the commutator 4. The conductive part is installed on the terminal 5 for conduction.

[0075] Specifically, during use, the position of the sliding frame 8 is first adjusted by setting the positioning component so that the end of the brush head 10 contacts the commutator 4. At this time, the terminal 5 is connected to the DC power supply. Electricity will pass through the terminal 5 and the wire 12. Under the action of the conductive part, it will enter the part of the brush head 10, so that electricity will pass through the commutator 4 into the rotor 3. At this time, the rotor 3 can be rotated by the cooperation of the permanent magnet 2 and the rotor 3. At the same time, due to the friction between the brush head 10 and the commutator 4, the brush head 10 is easily worn. When the brush head 10 is worn, the contact will be unstable. At this time, the pressure between the brush head 10 and the commutator 4 can be adjusted by setting the pressure control component and the conductive part to keep the brush head 10 in stable contact with the commutator 4 and reduce the wear.

[0076] The above, such as Figure 4 As shown, the conductive part includes an insulating pad 11, a wire 12, a conductive cylinder 13 and a first spring 14. Two insulating pads 11 are symmetrically and fixedly installed inside the housing 1. The two insulating pads 11 correspond to the two sliding frames 7 one by one. The two wiring terminals 5 are electrically connected to the wires 12. The conductive cylinders 13 are fixedly installed inside the two insulating pads 11. The two wires 12 are electrically connected to the two conductive cylinders 13 respectively. The first spring 14 is fixedly installed on the two insulating pads 11. The first spring 14 is fixedly connected to the tail end of the sliding frame 7. It also includes an insulating ring 15, a first conductive rod 16, an insulating frame 17, a conductor 18 and a second conductive Rod 19, insulating rings 15 are fixedly installed at the tail ends of the two sliding frames 7, and first conductive rods 16 are fixedly installed inside the two insulating rings 15. One end of the first conductive rod 16 slides and is electrically connected to the conductive tube 13. Insulating frames 17 are fixedly installed inside the two sliding frames 8. Multiple conductors 18 are fixedly installed at equal angles in a circular shape inside the two insulating frames 17. The conductor 18 slides and is electrically connected to the other end of the first conductive rod 16. Second conductive rods 19 are fixedly installed on the two brush heads 10. The second conductive rod 19 is slidably connected to the insulating frame 17, and the second conductive rod 19 slides and is electrically connected to the conductor 18.

[0077] Specifically, when the terminal 5 is connected to a DC power supply, the current enters the conductive tube 13 in the insulating pad 11 through the wire 12, and then enters the conductor 18 in the insulating frame 17 through the first conductive rod 16, and finally enters the brush head 10 through the second conductive rod 19, so that the commutator 4 can be discharged through the brush head 10. When the rotor 3 is running, the brush will be worn. At this time, the first spring 14 will be deformed, so that the brush head 10 and the commutator 4 always maintain stable contact. During the deformation of the first spring 14, a certain relative movement will occur between the conductive tube 13 and the first conductive rod 16, and it will not affect the normal conduction process. Through the arrangement of the insulating pad 11, the insulating ring 15 and the insulating frame 17, the sliding frame 7 and the sliding frame 8 can be prevented from being charged, thereby facilitating the adjustment of the position of the brush head 10.

[0078] like Figure 5 As shown, a pressure control assembly is installed on the brush assembly for controlling the pressure between the brush assembly and the commutator 4. The pressure control assembly includes a driven helical gear 20, a first screw 21, a first nut 22, a sliding cylinder 23, a displacement frame 24, a second spring 25, a driving helical gear 26 and a driving part. The driven helical gears 20 are rotatably installed on the two insulating frames 17. The first screws 21 are fixedly installed on the two driven helical gears 20. The first screws 21 are hollow structures. The first screws 21 are rotatably connected to the insulating frames 17. The two first screws 21 are threaded A first nut 22 is sleeved, and a sliding cylinder 23 is fixedly installed on the two first nuts 22. A displacement frame 24 is slidably installed inside the two sliding frames 8. The displacement frame 24 is fixedly connected to the sliding cylinder 23. A second spring 25 is fixedly installed on the two displacement frames 24. The second spring 25 is fixedly connected to the brush rod 9. A driving bevel gear 26 is rotatably installed on the inner top wall of the two sliding frames 8. The driving bevel gear 26 is meshed with the driven bevel gear 20. A driving part is installed on the two sliding frames 8 for adjusting the position of the displacement frame 24 and the brush rod 9.

[0079] Specifically, when the position of the brush head 10 needs to be adjusted, the driving part is turned to control the active bevel gear 26 to rotate, and the active bevel gear 26 drives the driven bevel gear 20 to rotate, which can drive the first screw 21 to rotate on the insulating frame 17, thereby pushing the sliding cylinder 23 to move through the setting of the first nut 22, and the sliding cylinder 23 pushes the displacement frame 24 to move, thereby adjusting the position of the second spring 25, thereby adjusting the size of the force that causes the second spring 25 to deform, and through the cooperation with the first spring 14, the brush and the commutator 4 can maintain stable contact.

[0080] It should be added that when the second spring 25 is deformed, the first spring 14 may not be deformed, or may be deformed very little. After adjusting the position of the brush head 10, the position of the brush rod 9 with the changed size does not contact the inner wall of the end of the sliding frame 8 close to the commutator 4. At this time, the second spring 25 is in a deformed state. When the brush head 10 is worn, since the second spring 25 is more likely to be deformed, the first spring 14 will release the pressure first, so that the brush head 10 and the commutator 4 fit tightly. When the first spring 14 returns to its initial state, the brush is still continuously worn. At this time, the second spring 25 can begin to release the pressure, thereby maintaining stable contact between the brush and the commutator 4 and stable pressure.

[0081] It should be noted that as the pressure of the first spring 14 is released, the thrust of the first spring 14 will gradually decrease. When the thrust of the first spring 14 is less than the critical point of pressure release of the second spring 25, the second spring 25 can still start to release pressure when the first spring 14 has not fully returned to its original position, thereby maintaining a stable pressure between the brush and the commutator 4 and reducing the number of maintenance times.

[0082] The above, such as Figure 7 As shown, the driving part includes a rotating disk 27 and a knob 28. The rotating disk 27 is rotatably installed on the top of the two sliding frames 8. The rotating disk 27 is fixedly connected to the active bevel gear 26. The knobs 28 are slidably installed on the two rotating disks 27. It also includes a third spring 29, an upper docking disk 30 and a lower docking disk 31. The third spring 29 is fixedly installed between the rotating disk 27 and the knob 28. The upper docking disk 30 is fixedly installed on the inner top walls of the two knobs 28. The lower docking disk 31 is fixedly installed on the top walls of the two rotating disks 27, and the lower docking disk 31 is adapted to the upper docking disk 30.

[0083] Specifically, in the process of adjusting the position of the brush head 10, when it is necessary to adjust the second spring 25, the knob 28 is pressed to move the knob 28 in the axial direction of the rotating disk 27. At this time, the third spring 29 is deformed until the upper docking disk 30 is docked with the lower docking disk 31. Since there are many anti-slip grooves evenly arranged between the upper docking disk 30 and the lower docking disk 31, when the upper docking disk 30 and the lower docking disk 31 are docked together, the knob 28 can be turned, and the knob 28 can be rotated along the circumferential direction of the rotating disk 27. Through the connection between the upper docking disk 30 and the lower docking disk 31, the rotating disk 27 can be driven to rotate, thereby driving the active bevel gear 26 to rotate. When no adjustment is needed, under the action of the third spring 29, the upper docking disk 30 and the lower docking disk 31 are in a separated state. At this time, the rotation of the knob 28 will not drive the rotating disk 27 to rotate, thereby reducing the possibility of accidental touch during the adjustment process.

[0084] like Figure 8As shown, the positioning assembly is installed inside the brush assembly and is used to adjust the position of the brush assembly. The positioning assembly includes a positioning frame 32, a pushing part and a transmission part. The positioning frames 32 are fixedly installed on both sides of the two sliding frames 7. The pushing part is installed inside the positioning frame 32 and is used to drive the sliding frame 8 to move inside the sliding frame 7. The transmission part is installed inside the positioning frame 32 and is used to transmit power.

[0085] Specifically, when adjusting the position of the brush head 10 , the transmission part is provided to push the pushing part to move in the position adjustment frame 32 , so that the position of the sliding frame 8 in the sliding frame 7 can be adjusted, thereby adjusting the position of the brush head 10 .

[0086] The above, such as Figure 8 As shown, the pushing part includes a second screw rod 33, a second nut 34 and a slider 35. Two second screw rods 33 are rotatably installed inside the four adjustment frames 32, and second nuts 34 are fixedly installed on the four second screw rods 33. Slide blocks 35 are slidably installed on both sides of the two sliding frames 8, and the four sliders 35 are fixedly connected to the four second nuts 34 respectively.

[0087] Specifically, when adjusting the position of the brush head 10 , the second screws 33 on both sides of the two sliding frames 7 are adjusted at the same time. By setting the second nut 34 , the position of the sliding frame 8 is adjusted under the drive of the slider 35 , so that the position of the brush head 10 can be adjusted.

[0088] The above, such as Figure 8 As shown, the transmission part includes a first gear 36, a second gear 37 and a joint 38. The first gear 36 is rotatably installed inside the four adjustment frames 32, and the first gear 36 is fixedly connected to the second screw 33. The second gear 37 is rotatably installed inside the four adjustment frames 32, and the second gear 37 is meshed with the first gear 36. The joint 38 is rotatably installed on the four adjustment frames 32, and the joint 38 is fixedly connected to the second gear 37.

[0089] Specifically, when adjusting the position of the brush head 10, the joints 38 on both sides of the two sliding frames 7 are adjusted by a wrench or other tools at the same time, and the joints 38 can drive the second gear 37 to rotate, and the second gear 37 drives the first gear 36 to rotate, which can drive the second screw 33 to rotate. Figure 8 It can be seen that, under the action of the first gear 36 and the second gear 37 , the position where the joint 38 and the tool are connected is relatively open, which facilitates the adjustment of the position of the joint 38 .

[0090] In this embodiment, during use, the position of the sliding frame 8 is first adjusted so that the end of the brush head 10 contacts the commutator 4. At this time, the joints 38 on both sides of the two sliding frames 7 are adjusted simultaneously by using tools such as a wrench. The joints 38 can drive the second gear 37 to rotate, and the second gear 37 drives the first gear 36 to rotate, which can drive the second screw rod 33 to rotate. Through the setting of the second nut 34, the position of the sliding frame 8 in the sliding frame 7 can be adjusted under the drive of the slider 35, thereby adjusting the position of the brush head 10.

[0091] Then it is necessary to further adjust the position of the brush head 10. At this time, the knob 28 is pressed to move the knob 28 in the axial direction of the rotating disk 27. At this time, the third spring 29 is deformed until the upper docking disk 30 is docked with the lower docking disk 31. Since there are many anti-slip grooves evenly arranged between the upper docking disk 30 and the lower docking disk 31, when the upper docking disk 30 and the lower docking disk 31 are docked together, the knob 28 can be turned, and the knob 28 can be rotated along the circumference of the rotating disk 27. Through the connection between the upper docking disk 30 and the lower docking disk 31, the rotating disk 27 can be driven to rotate, thereby driving the active bevel gear 26 to rotate. When no adjustment is required, under the action of the third spring 29, the upper docking disk 30 and the lower docking disk 31 are in a separated state. At this time, the rotation of the knob 28 does not drive the rotating disk 27 to rotate, thereby reducing the possibility of accidental touch during the adjustment process.

[0092] As the active bevel gear 26 rotates, the active bevel gear 26 drives the driven bevel gear 20 to rotate, which can drive the first screw 21 to rotate on the insulating frame 17, so that through the setting of the first nut 22, the sliding cylinder 23 is pushed to move, and the sliding cylinder 23 pushes the displacement frame 24 to move, so as to adjust the position of the second spring 25, thereby adjusting the size of the force that causes the second spring 25 to deform, and through the cooperation with the first spring 14, the brush and the commutator 4 can maintain stable contact.

[0093] As the pressure of the first spring 14 is released, the thrust of the first spring 14 will gradually decrease. When the thrust of the first spring 14 is less than the critical point of the pressure release of the second spring 25, the second spring 25 can still start to release the pressure when the first spring 14 has not completely returned to its original position, thereby maintaining a stable pressure between the brush and the commutator 4 and reducing the number of maintenance times.

[0094] At this time, the terminal block 5 can be connected to the DC power supply, and electricity will pass through the terminal block 5 and the wire 12. When the terminal block 5 is connected to the DC power supply, the current enters the conductive tube 13 in the insulating pad 11 through the wire 12, and then passes into the conductor 18 in the insulating frame 17 through the first conductive rod 16, and finally enters the brush head 10 through the second conductive rod 19, and the commutator 4 can be discharged through the brush head 10. When the rotor 3 is running, the first spring 14 and the second spring 25 cooperate to keep the brush head 10 and the commutator 4 in stable contact at all times. During the deformation of the first spring 14, a certain relative movement will occur between the conductive tube 13 and the first conductive rod 16, and the normal conduction process will not be affected. By setting the insulating pad 11, the insulating ring 15 and the insulating frame 17, the sliding frame 7 and the sliding frame 8 can be prevented from being charged, thereby facilitating the adjustment of the position of the brush head 10.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A contact-stable motor brush assembly, comprising a housing (1), a permanent magnet (2) fixedly mounted inside the housing (1), a rotor (3) rotatably mounted inside the housing (1), the rotor (3) being located inside the permanent magnet (2), characterized in that: Also includes: A commutator (4), the commutator (4) being fixedly mounted on the rotor (3); Wiring terminals (5), two of the wiring terminals (5) being symmetrically and fixedly mounted inside the housing (1); A brush assembly, the brush assembly being installed inside the housing (1) and being used for transmitting current; A pressure control assembly, the pressure control assembly being mounted on the brush assembly and used for controlling the pressure between the brush assembly and the commutator (4); A position adjustment component is installed inside the brush assembly and is used to adjust the position of the brush assembly.

2. A contact-stable motor brush assembly according to claim 1, characterized in that: The brush assembly comprises: A mounting frame (6), the mounting frame (6) being fixedly mounted inside the housing (1), the mounting frame (6) being located at the bottom of the wiring terminal (5); A sliding frame (7), wherein two sliding frames (7) are symmetrically and slidably mounted on the mounting frame (6), and the two sliding frames (7) are staggered with the two wiring terminals (5) respectively; A sliding frame (8), wherein the sliding frame (8) is slidably mounted inside the two sliding frames (7); A brush rod (9), wherein the brush rod (9) is slidably mounted inside the two sliding frames (8); A brush head (10), the brush head (10) being detachably mounted on each of the two brush rods (9), and the brush head (10) being adapted to the commutator (4); A conductive part, which is mounted on the connecting terminal (5) and is used for conducting electricity.

3. A contact-stable motor brush assembly according to claim 2, characterized in that: The conductive part comprises: Insulating pads (11), two insulating pads (11) are symmetrically and fixedly mounted inside the housing (1), and the two insulating pads (11) correspond one to one with the two sliding frames (7); A wire (12), both of the two wiring terminals (5) being electrically connected to the wire (12); A conductive tube (13), wherein the conductive tube (13) is fixedly installed inside the two insulating pads (11), and the two conductive wires (12) are electrically connected to the two conductive tubes (13) respectively; A first spring (14), the first spring (14) being fixedly mounted on each of the two insulating pads (11), and the first spring (14) being fixedly connected to the rear end of the sliding frame (7).

4. A contact-stable motor brush assembly according to claim 3, characterized in that: Also includes: An insulating ring (15), the insulating ring (15) being fixedly mounted on the tail of the two sliding frames (7); A first conductive rod (16), wherein the first conductive rod (16) is fixedly mounted inside the two insulating rings (15), and one end of the first conductive rod (16) slides with and is electrically connected to the conductive cylinder (13); An insulating frame (17), wherein the insulating frame (17) is fixedly mounted inside the two sliding frames (8); Conductors (18), a plurality of the conductors (18) being fixedly mounted at equal angles in a circular shape inside the two insulating frames (17), and the conductors (18) being slidably connected to the other end of the first conductive rod (16) and electrically connected; A second conductive rod (19), the second conductive rod (19) being fixedly mounted on each of the two brush heads (10), the second conductive rod (19) being slidably connected to the insulating frame (17), and the second conductive rod (19) being slidably and electrically connected to the conductor (18).

5. A contact-stable motor brush assembly according to claim 4, characterized in that: The pressure control component comprises: A driven helical gear (20), on which the two insulating frames (17) are rotatably mounted; a first screw rod (21), the first screw rod (21) being fixedly mounted on each of the two driven helical gears (20), the first screw rod (21) being a hollow structure, and the first screw rod (21) being rotatably connected to the insulating frame (17); A first nut (22), the first nut (22) being threadedly sleeved on each of the two first screw rods (21); A sliding cylinder (23), the sliding cylinder (23) being fixedly mounted on each of the two first nuts (22); A displacement frame (24), wherein the displacement frame (24) is slidably mounted inside the two sliding frames (8), and the displacement frame (24) is fixedly connected to the sliding cylinder (23); a second spring (25), the second spring (25) being fixedly mounted on each of the two displacement frames (24), and the second spring (25) being fixedly connected to the brush rod (9); A driving bevel gear (26), the driving bevel gear (26) being rotatably mounted on the inner top walls of the two sliding frames (8), the driving bevel gear (26) being meshed with the driven bevel gear (20); A driving unit is installed on each of the two sliding frames (8) and is used to adjust the positions of the displacement frame (24) and the brush rod (9).

6. A contact-stable motor brush assembly according to claim 5, characterized in that: The driving unit comprises: A rotating disk (27), the rotating disk (27) being rotatably mounted on the top of the two sliding frames (8), and the rotating disk (27) being fixedly connected to the driving bevel gear (26); A knob (28) is slidably mounted on each of the two rotating disks (27).

7. A contact-stable motor brush assembly according to claim 6, characterized in that: Also includes: a third spring (29), the third spring (29) being fixedly mounted between the rotating disk (27) and the knob (28); An upper docking plate (30), the upper docking plate (30) being fixedly mounted on the inner top walls of the two knobs (28); A lower docking plate (31) is fixedly mounted on the top walls of the two rotating plates (27), and the lower docking plate (31) is adapted to fit the upper docking plate (30).

8. A contact-stable motor brush assembly according to claim 7, characterized in that: The positioning component comprises: A position adjustment frame (32), the position adjustment frame (32) being fixedly mounted on both sides of the two sliding frames (7); A pushing portion, the pushing portion being installed inside the positioning frame (32) and used for driving the sliding frame (8) to move inside the sliding frame (7); A transmission part, the transmission part is installed inside the position adjustment frame (32) and is used for transmitting power.

9. A contact-stable motor brush assembly according to claim 8, characterized in that: The driving part comprises: Second screw rods (33), two of which are rotatably mounted inside the four positioning frames (32); a second nut (34), the second nut (34) being fixedly mounted on each of the four second screw rods (33); A slider (35), the sliders (35) are slidably mounted on both sides of the two sliding frames (8), and the four sliders (35) are fixedly connected to the four second nuts (34) respectively.

10. A contact-stable motor brush assembly according to claim 9, characterized in that: The transmission part comprises: a first gear (36), wherein the first gear (36) is rotatably mounted inside each of the four position adjustment frames (32), and the first gear (36) is fixedly connected to the second screw rod (33); a second gear (37), wherein the second gear (37) is rotatably mounted inside each of the four position adjustment frames (32), and the second gear (37) is meshed with the first gear (36); A joint (38) is rotatably mounted on each of the four position adjustment frames (32), and the joint (38) is fixedly connected to the second gear (37).

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