A small motor with tight internal arrangement

Abstract

The present invention relates to the field of motor technology, specifically to a small motor with a tight internal arrangement, including a rear cover, a shell connected to the side wall of the rear cover, a rotor rotatably installed between the shell and the rear cover, a commutator installed on the rotor, and two magnets installed on the inner wall of the shell, a conductive mechanism is symmetrically arranged between the commutator and the rear cover, and three arc-shaped scrapers are arranged on the outer side of the commutator, and the outer arc surfaces of the three arc-shaped scrapers are fixedly connected with connecting rods. The graphite debris attached to the outer wall of the commutator and the brush corresponding to the gap in the motor can be cleaned up easily and quickly, and there is no need to disassemble and install the motor, so that the staff can operate conveniently. At the same time, a proper amount of lubricating oil can be applied to the outer wall of the commutator. After the lubricant on the outer wall of the commutator is reduced, the replenishment operation is more convenient, ensuring the contact effect between the commutator and the brush.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a small motor with a tightly arranged interior. Background Art

[0002] The basic structure of the motor includes the back cover, housing, rotor, magnet and brush assembly. The back cover and housing constitute the external protection structure of the motor, and the rotor, magnet and brush assembly constitute the internal structure of the motor (the rotor shaft runs through the housing). The size of the motor depends on the required use. For small motors, the internal structure is small and closely arranged together for lower power output.

[0003] The rotor is the rotating part of the motor, usually composed of an iron core, coils, and a commutator (in a brushed motor). When current passes through the coils, the rotor is rotated by the force of the magnetic field. Magnets are mounted on the inner wall of the housing to generate a rotating magnetic field. The brush assembly is mainly used to transfer current from an external power source to the rotating rotor. The brushes in the brush assembly contact the commutator, and the contact points are constantly changed as the rotor rotates to ensure that current can be continuously transferred to the rotor coils.

[0004] The brushes are mainly made of graphite material. When the motor is running, the brushes and the commutator will constantly rub against each other, which will slowly wear down the brushes. When the motor needs to input a larger current to meet the higher speed requirements, the motor will run under high load for a long time, and the friction and heat generated between the brushes and the commutator will also increase, which will accelerate the reduction of lubricants on the commutator surface. In addition, the commutator surface will also adhere to more graphite debris generated by the friction of the brushes, which will cause a large amount of heat to be generated inside the motor. In addition, the heat generated by the motor overload can easily affect the normal use of the motor. The staff often need to frequently disassemble and install the motor, and clean and lubricate the commutator surface during this process. This series of operations is cumbersome. Summary of the invention

[0005] The object of the present invention is to provide a compact motor with a compact internal structure to solve the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a small motor with tight internal arrangement, comprising: a rear cover, a shell connected to the side wall of the rear cover, a rotor rotatably mounted between the shell and the rear cover, a commutator mounted on the rotor, and two magnets mounted on the inner wall of the shell, wherein three arc-shaped scraping blocks are arranged on the outer side of the commutator, the outer arc surfaces of the three arc-shaped scraping blocks are fixedly connected to connecting rods, the inner arc surfaces of the three arc-shaped scraping blocks are fixedly connected to plug blocks, the ends of the three connecting rods away from the arc-shaped scraping blocks are connected to connecting rings through elastic components, and the outer walls of the three connecting rods near the connecting rings are fixedly connected to L-shaped plates 2;

[0007] Also includes:

[0008] Two conductive mechanisms, used to connect the commutator so as to transfer current from an external power source to the rotor, the two conductive mechanisms being symmetrically arranged between the commutator and the rear cover;

[0009] A pulling mechanism, used for pulling the three arc-shaped scraping blocks to move, wherein the pulling mechanism is arranged between the connecting ring and the rear cover;

[0010] Three lubrication mechanisms, used for lubricating the outer wall of the commutator to reduce mechanical friction, the three lubrication mechanisms are respectively arranged at the plate walls of the three L-shaped plates 2 away from the connecting ring;

[0011] The three blocking members are used to drive the three arc-shaped scraping blocks to approach the commutator so that the three arc-shaped scraping blocks can clean the outer wall of the commutator. The three blocking members are respectively arranged between the three L-shaped plates and the rear cover.

[0012] Preferably, the conductive mechanism includes a connecting block, which is fixedly inserted through the eccentric part of the side wall of the rear cover, and the connecting block is fixedly connected to a connecting column on the wall surface located on the inner side of the outer shell, and a splicing plate is slidably sleeved on the outer wall of the connecting column, and a brush is fixedly connected to the wall surface of the splicing plate away from the connecting column, and one end of the brush away from the splicing plate is fitted with the outer wall of the commutator, and a spring is slidably sleeved on the outer wall of the connecting column, and the spring is fixedly connected between the splicing plate and the connecting block, and an L-shaped plate is fixedly connected to the wall surface of the splicing plate near the brush.

[0013] Preferably, the elastic component includes an L-shaped block 1, the L-shaped block 1 is fixedly connected to the end of the connecting rod away from the arc-shaped scraper block, the L-shaped block 1 is slidably inserted with a pillar on the plate wall away from the connecting rod, and the pillar is fixedly connected with an L-shaped block 2 at one end close to the connecting rod, the L-shaped block 2 is fit between the L-shaped block 1, the wall surface of the L-shaped block 2 away from the L-shaped block 1 is fixedly connected to the side wall of the arc-shaped scraper block corresponding to the connecting ring, a spring 3 is slidably sleeved on the outer wall of the pillar, and the spring 3 is fixedly connected between the L-shaped block 2 and the L-shaped block 1.

[0014] Preferably, the pulling mechanism comprises two guide pillars, which are symmetrically fixedly connected to the side wall of the connecting ring away from the arc-shaped scraper block in the upper and lower directions, and the two guide pillars are movable through the back cover, and one end of the two guide pillars away from the connecting ring is commonly fixedly connected to a pulling block, and the pulling block is attached to the middle part of the side wall of the back cover away from the outer shell, and a spring 2 is slidably sleeved on the outer wall of the two guide pillars, and the two springs 2 are fixedly connected between the connecting ring and the back cover.

[0015] Preferably, the lubrication mechanism includes an arc-shaped shell, which is arranged on a side of the arc-shaped scraper block away from the connecting rod, an elastic component is provided between the arc-shaped shell and the second L-shaped plate, an oil injection mechanism is provided on the outer arc surface of the arc-shaped shell, an arc-shaped sponge block is fixedly connected to the inner arc surface of the arc-shaped shell, a plurality of holes and grooves are penetrated through the inner arc surface of the arc-shaped shell, an arc-shaped rubber plate is attached to the inner lower arc surface of the arc-shaped shell, and a release mechanism is provided between the arc-shaped rubber plate and the arc-shaped shell.

[0016] Preferably, the elastic component includes a splicing column, which is slidably inserted into the wall of the L-shaped plate 2 away from the connecting ring, and one end of the splicing column close to the connecting rod is fixedly connected to the middle part of the outer curved surface of the arc shell. A spring 4 is slidably sleeved on the outer wall of the splicing column, and the spring 4 is fixedly connected between the L-shaped plate 2 and the arc shell.

[0017] Preferably, the oil filling mechanism comprises an oil filling pipe, which is connected to the outer arc surface of the arc shell near the splicing column, and a pipe plug is slidably inserted into the pipe opening of the oil filling pipe away from the arc shell.

[0018] Preferably, the release mechanism includes a cylinder and three springs five, the cylinder is fixedly inserted in the middle of the wall of the arc-shaped rubber plate, and one end of the cylinder corresponding to the commutator moves through the arc-shaped shell and the arc-shaped sponge block in sequence, one of the springs five is fixedly connected between the end of the cylinder away from the commutator and the inner upper arc surface of the arc shell, and the other two springs five are respectively fixedly connected between the outer arc surface of the arc-shaped rubber plate near the two side edges and the inner upper arc surface of the arc shell.

[0019] Preferably, the blocking member comprises an L-shaped plate, one end of which is fixedly connected to the side wall of the shell corresponding to the rear cover, and one end of the L-shaped plate away from the rear cover fits with the inclined wall of the second L-shaped plate near the connecting rod.

[0020] Preferably, the included angle of the L-shaped plate 2 and the included angle of the L-shaped plate 1 are both obtuse angles.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Through the cooperation of the conductive mechanism, arc-shaped scraper block, connecting rod, plug block, elastic component, connecting ring, pulling mechanism, and L-shaped plate 2 blocking parts, the graphite debris attached to the outer wall of the commutator in the motor and the brush corresponding to the gap can be cleaned up easily and quickly, and there is no need to disassemble and install the motor, so that the staff can operate conveniently.

[0023] 2. Through the cooperation of the lubrication mechanism, the elastic component and the release mechanism, the graphite debris attached to the outer wall of the commutator and the brush corresponding to the gap can be cleaned up and at the same time, a proper amount of lubricating oil can be applied to the outer wall of the commutator. After the lubricant on the outer wall of the commutator is reduced, the replenishment operation is more convenient, ensuring the contact effect between the commutator and the brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a cross-sectional view of the housing and the back cover of the present invention;

[0026] Figure 3 The figure shows the internal structure of the housing of the present invention and the cross-sectional view of the rear cover;

[0027] Figure 4 It is a structural diagram showing the arc-shaped shell and the pull block of the present invention;

[0028] Figure 5 It is a structural display diagram of the arc shell of the present invention;

[0029] Figure 6 It is a cross-sectional view of the arc-shaped shell, the arc-shaped sponge block, the oil injection pipe and the pipe plug of the present invention;

[0030] Figure 7 It is a display diagram of the rotor and the conductive mechanism of the present invention and a cross-sectional view of the housing and the rear cover;

[0031] Figure 8 It is a partial top view of the present invention and a cross-sectional view of the housing and the back cover.

[0032] In the figure: 1. rotor; 2. shell; 3. back cover; 4. connecting block; 5. pulling block; 6. magnet; 7. arc shell; 8. arc scraper block; 9. connecting ring; 10. L-shaped plate; 11. connecting column; 12. spring one; 13. L-shaped plate one; 14. splicing plate; 15. brush; 16. commutator; 17. L-shaped plate two; 18. connecting rod; 19. spring two; 20. guide column; 21. oil filling pipe; 22. pipe plug; 23. L-shaped block one; 24. L-shaped block two; 25. plug; 26. arc sponge block; 27. spring three; 28. pillar; 29. ​​spring four; 30. splicing column; 31. cylinder; 32. spring five; 33. hole groove; 34. arc rubber plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in 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.

[0034] Example 1: Please refer to Figure 1 - Figure 8 , a small motor with a tightly arranged interior is shown in the figure, comprising: a rear cover 3, a housing 2 connected to the side wall of the rear cover 3, a rotor 1 rotatably mounted between the housing 2 and the rear cover 3, a commutator 16 mounted on the rotor 1 and two magnets 6 mounted on the inner wall of the housing 2, three arc-shaped scraper blocks 8 are arranged on the outer side of the commutator 16, the outer arc surfaces of the three arc-shaped scraper blocks 8 are fixedly connected with connecting rods 18, the inner arc surfaces of the three arc-shaped scraper blocks 8 are fixedly connected with plug blocks 25, the ends of the three connecting rods 18 away from the arc-shaped scraper blocks 8 are connected with connecting rings 9 through elastic components, and the outer walls of the three connecting rods 18 near the connecting rings 9 are fixedly connected with L-shaped plates 17;

[0035] Also includes:

[0036] Two conductive mechanisms, used to connect the commutator 16 so as to transfer current from an external power source to the rotor 1, the two conductive mechanisms are symmetrically arranged between the commutator 16 and the rear cover 3;

[0037] A pulling mechanism, used for pulling the three arc-shaped scraping blocks 8 to move, the pulling mechanism is arranged between the connecting ring 9 and the rear cover 3;

[0038] Three lubrication mechanisms, used to lubricate the outer wall of the commutator 16 to reduce mechanical friction, the three lubrication mechanisms are respectively arranged on the plate walls of the three L-shaped plates 17 away from the connecting ring 9;

[0039] The three blocking members are used to drive the three arc-shaped scraping blocks 8 to approach the commutator 16 so that the three arc-shaped scraping blocks 8 can clean the outer wall of the commutator 16 . The three blocking members are respectively arranged between the three L-shaped plates 17 and the rear cover 3 .

[0040] The conductive mechanism includes a connecting block 4, which is fixedly passed through the eccentric part of the side wall of the rear cover 3. The connecting block 4 is fixedly connected to a connecting column 11 on the wall surface inside the outer shell 2. A splicing plate 14 is slidably sleeved on the outer wall of the connecting column 11. A brush 15 is fixedly connected to the wall surface of the splicing plate 14 away from the connecting column 11. One end of the brush 15 away from the splicing plate 14 is fitted with the outer wall of the commutator 16. A spring 12 is slidably sleeved on the outer wall of the connecting column 11. The spring 12 is fixedly connected between the splicing plate 14 and the connecting block 4. An L-shaped plate 13 is fixedly connected to the wall surface of the splicing plate 14 near the brush 15.

[0041] The elastic component includes an L-shaped block 23, which is fixedly connected to the end of the connecting rod 18 away from the arc-shaped scraper block 8. The plate wall of the L-shaped block 23 away from the connecting rod 18 is slidably interspersed with a pillar 28, and the end of the pillar 28 close to the connecting rod 18 is fixedly connected to an L-shaped block 24, the L-shaped block 24 and the L-shaped block 1 23 are fitted together, and the wall surface of the L-shaped block 24 away from the L-shaped block 1 23 is fixedly connected to the side wall of the arc-shaped scraper block 8 corresponding to the connecting ring 9, and a spring 3 27 is slidably sleeved on the outer wall of the pillar 28, and the spring 3 27 is fixedly connected between the L-shaped block 24 and the L-shaped block 1 23.

[0042] The pulling mechanism includes two guide pillars 20, which are symmetrically fixedly connected to the side wall of the connecting ring 9 away from the arc-shaped scraper block 8. The two guide pillars 20 are movable through the back cover 3. The ends of the two guide pillars 20 away from the connecting ring 9 are commonly fixedly connected with a pulling block 5. The pulling block 5 is attached to the middle part of the side wall of the back cover 3 away from the outer shell 2. Springs 19 are slidably sleeved on the outer walls of the two guide pillars 20, and the two springs 19 are fixedly connected between the connecting ring 9 and the back cover 3.

[0043] The blocking member includes an L-shaped plate 10, one end of which is fixedly connected to the side wall of the rear cover 3 corresponding to the housing 2, and the end of the L-shaped plate 10 away from the rear cover 3 is in contact with the inclined wall of the L-shaped plate 2 17 near the connecting rod 18.

[0044] The angle between the L-shaped plate 17 and the L-shaped plate 13 is an obtuse angle; specifically, one long plate wall of the L-shaped plate 17 and one short plate wall of the L-shaped plate 13 are parallel to the commutator 16, while the other short plate wall of the L-shaped plate 17 and the other long plate wall of the L-shaped plate 13 are inclined. Figure 8 .

[0045] In this embodiment, for cleaning the graphite debris attached to the brush 15 corresponding to the outer wall of the commutator 16, first, hold the housing 2 with one hand and pull the pull block 5 backward with the other hand (backward means the direction away from the housing 2), the pull block 5 can drive the two guide pillars 20 to slide backward in the inner wall of the rear cover 3, the two guide pillars 20 can drive the connecting ring 9 to move backward, and the connecting ring 9 will squeeze the two springs 2 19 connected to the rear cover 3, and the connecting ring 9 will drive the three L-shaped blocks 2 24 to move backward together, the three L-shaped blocks 2 24 can drive the pillars 28, springs 3 27 and L-shaped blocks 1 23 connected to them to move backward together, the three L-shaped blocks 1 23 can drive the connecting rods 18, L-shaped plates 2 17, arc-shaped scraper blocks 8 and insert blocks 25 connected to them to move backward together, the inclined walls of the three L-shaped plates 2 17 will squeeze the ends of the corresponding L-shaped plates 10, and under the action of the squeezing force, the three The two L-shaped plates 17 will move synchronously toward the commutator 16, and the three L-shaped plates 17 can drive their respective connected connecting rods 18, arc-shaped scraper blocks 8 and plug blocks 25 to move toward the commutator 16 (in the process, each connecting rod 18 will drive their respective connected L-shaped blocks 23 to slide outside the corresponding pillars 28 and squeeze the corresponding springs 3 27). At the same time, the backward movement of the connecting ring 9 will also squeeze the inclined walls of the two L-shaped plates 13. Under the action of the squeezing force, the two L-shaped plates 13 will drive their respective connected splicing plates 14 to move away from the commutator 16, and the two splicing plates 14 will slide away from each other on the outer walls of the two connecting columns 11, and the two splicing plates 14 will respectively stretch the springs 12 connected to the corresponding connecting blocks 4, and the two splicing plates 14 will drive their respective connected brushes 15 to move away from the commutator 16.

[0046] As the pull block 5 continues to be pulled backward, the horizontal walls of the three L-shaped plates 17 (the horizontal walls of the L-shaped plates 17 are the plate walls parallel to the commutator 16) will slide in contact with the ends of the corresponding L-shaped plates 10, and the subsequent connecting ring 9 will also slide in contact with the horizontal walls of the two L-shaped plates 13 (the horizontal walls of the L-shaped plates 13 are the plate walls parallel to the commutator 16). At this time, the inner arc surfaces of the three arc-shaped scraper blocks 8 will move to the outer wall of the commutator 16 and stop moving in the direction of the commutator 16. As the pull block 5 continues to be pulled backward, the three arc-shaped scraper blocks 8 will pass over the two brushes 15, thereby scraping off the graphite debris attached to the two brushes 15 on the outer wall of the commutator 16, and the gaps at the two brushes 15 of the commutator 16 will also be scraped off and cleaned by the three insert blocks 25.

[0047] When the three arc-shaped scraper blocks 8 move to the edge of the commutator 16, the pull block 5 is released (that is, the spring two 19 is compressed to the limit, and the staff can sense it by pulling the pull block 5). Then, under the action of the spring two 19, the pull block 5, the two guide pillars 20, the connecting ring 9, the three L-shaped blocks two 24, the three pillars 28, the three springs three 27, the three L-shaped blocks one 23, the three connecting rods 18, the three L-shaped plates two 17, the three arc-shaped scraper blocks 8 and the three plug blocks 25 will all move forward for reset, and under the action of the spring three 27, the three L-shaped blocks one 23, the three connecting rods 18, the three L-shaped plates two 17, the three arc-shaped scraper blocks 8 and the three plug blocks 25 will all move away from the commutator 16 for reset, so as to avoid contact with the commutator 16 and affect current conduction. Under the force of the spring 12, the two splicing plates 14, the two L-shaped plates 13 and the two brushes 15 will move closer to each other, and the two brushes 15 will not interfere with the process of the three arc-shaped scraper blocks 8 returning to the front. The three arc-shaped scraper blocks 8 will first pass over the two brushes 15, and then the ends of the two brushes 15 will continue to maintain contact with the commutator 16. It should be noted that the connecting block 4, the splicing plate 14 and the connecting column 11 can all be made of conductive materials (such as copper), and the positive and negative wires of the external power supply are connected to the two connecting blocks 4 to achieve the conduction of current to the rotor 1.

[0048] It should also be noted that the graphite debris attached to the outer wall of the commutator 16 and the brush 15 corresponding to the gap can be cleaned up easily and quickly, and there is no need to disassemble and install the motor, which makes it convenient for the staff to operate.

[0049] Example 2: Please refer to Figure 1 - Figure 8 The present embodiment further explains the first embodiment. In the figure, the lubrication mechanism includes an arcuate shell 7, which is arranged on the side of the arcuate scraper block 8 away from the connecting rod 18. An elastic component is provided between the arcuate shell 7 and the L-shaped plate 2 17. An oiling mechanism is provided on the outer arc surface of the arcuate shell 7. An arcuate sponge block 26 is fixedly connected to the inner arc surface of the arcuate shell 7. A plurality of holes 33 are formed through the inner arc surface of the arcuate shell 7. An arcuate rubber plate 34 is attached to the inner lower arc surface of the arcuate shell 7. A release mechanism is provided between the arcuate rubber plate 34 and the arcuate shell 7.

[0050] The elastic component includes a splicing column 30, which is slidably inserted into the wall of the L-shaped plate 17 away from the connecting ring 9. One end of the splicing column 30 close to the connecting rod 18 is fixedly connected to the middle of the outer arc surface of the arc shell 7. A spring four 29 is slidably sleeved on the outer wall of the splicing column 30, and the spring four 29 is fixedly connected between the L-shaped plate 17 and the arc shell 7.

[0051] The oil filling mechanism includes an oil filling pipe 21, which is connected to the outer arc surface of the arc shell 7 near the splicing column 30, and a pipe plug 22 is slidably inserted into the oil filling pipe 21 away from the pipe mouth of the arc shell 7; specifically, by pulling out the pipe plug 22, the arc shell 7 can be filled with lubricating oil along the oil filling pipe 21.

[0052] The release mechanism includes a cylinder 31 and three springs 5 ​​32. The cylinder 31 is fixedly inserted in the middle of the wall of the arc-shaped rubber plate 34. One end of the cylinder 31 corresponding to the commutator 16 moves through the arc-shaped shell 7 and the arc-shaped sponge block 26 in sequence. One of the springs 5 ​​32 is fixedly connected between the end of the cylinder 31 away from the commutator 16 and the inner upper arc surface of the arc-shaped shell 7, and the other two springs 5 ​​32 are respectively fixedly connected between the outer arc surface of the arc-shaped rubber plate 34 near the two side edges and the inner upper arc surface of the arc-shaped shell 7.

[0053] In this embodiment, when each L-shaped plate 17 moves backward and moves closer to the commutator 16, it will drive the arc shell 7 connected to it to move backward and closer to the commutator 16 through the splicing column 30 and the spring four 29. The arc sponge block 26 connected to the inner arc surface of the arc shell 7 will contact the outer wall of the commutator 16 before the arc scraper block 8. When the inner arc surface of the arc scraper block 8 contacts the commutator 16, the arc shell 7 will squeeze the arc sponge block 26 and deform it to be on the outer wall of the commutator 16, and the L-shaped plate 17 will also slide outside the splicing column 30 to a certain extent and squeeze the spring four 29. Before the arc sponge block 26 contacts the outer wall of the commutator 16, the cylinder 31 contacts the outer wall of the commutator 16 before the arc sponge block 26, and as the arc shell 7 continues to move closer to the commutator 16, the cylinder 31 will remain stationary, and the lower arc surface inside the arc shell 7 will separate from the arc rubber plate 34 and compress the spring 5 32. At this time, the lubricating oil in the arc shell 7 will flow along the multiple holes 33 into the porous structure arc sponge block 26, so that the arc sponge block 26 is soaked with lubricating oil, and the backward movement of the arc sponge block 26 will smear the lubricating oil on the outer wall of the commutator 16.

[0054] When each L-shaped plate 2 17 moves forward and away from the commutator 16 for reset, the arc shell 7 will also move forward and away from the commutator 16 for reset. At this time, under the action of the spring 5 32, the arc rubber plate 34 will fit with the arc surface of the lower inner side of the arc shell 7 and block the multiple holes 33, thereby preventing the lubricating oil from flowing into the arc sponge block 26.

[0055] It should be noted that while the graphite debris attached to the outer wall of the commutator 16 and the brush 15 corresponding to the gap are cleaned up, a proper amount of lubricating oil can be applied to the outer wall of the commutator 16. After the lubricant on the outer wall of the commutator 16 is reduced, the replenishment operation is more convenient, thereby ensuring the contact effect between the commutator 16 and the brush 15.

[0056] It should also be noted that after each stop of the motor, an encoder can be installed before this and a corresponding control program can be written to accurately control the rotation angle and stop position of the rotor shaft of the small motor, so that after each stop of the motor, the state of the rotor 1 and the commutator 16 is always as follows: Figure 2 The state shown in FIG. 1 ensures that the insert block 25 can correspond to the gap of the commutator 16 every time.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compact motor with a compact internal layout, characterized in that: include: A rear cover (3), a housing (2) connected to the side wall of the rear cover (3), a rotor (1) rotatably mounted between the housing (2) and the rear cover (3), a commutator (16) mounted on the rotor (1), and two magnets (6) mounted on the inner wall of the housing (2), wherein three arc-shaped scraping blocks (8) are arranged on the outer side of the commutator (16), the outer arc surfaces of the three arc-shaped scraping blocks (8) are fixedly connected to connecting rods (18), the inner arc surfaces of the three arc-shaped scraping blocks (8) are fixedly connected to insert blocks (25), the ends of the three connecting rods (18) away from the arc-shaped scraping blocks (8) are connected to connecting rings (9) via elastic components, and the outer walls of the three connecting rods (18) near the connecting ring (9) are fixedly connected to L-shaped plates (17); Also includes: Two conductive mechanisms, used to connect the commutator (16) so as to transfer current from an external power source to the rotor (1), the two conductive mechanisms being symmetrically arranged between the commutator (16) and the rear cover (3); The conductive mechanism comprises a connecting block (4), the connecting block (4) being fixedly inserted through an eccentric portion of a side wall of the rear cover (3), the connecting block (4) being fixedly connected to a connecting column (11) on a wall surface located on the inner side of the housing (2), a splicing plate (14) being slidably sleeved on an outer wall of the connecting column (11), a brush (15) being fixedly connected to a wall surface of the splicing plate (14) away from the connecting column (11), an end of the brush (15) away from the splicing plate (14) being in contact with an outer wall of a commutator (16), a spring (12) being slidably sleeved on an outer wall of the connecting column (11), the spring (12) being fixedly connected between the splicing plate (14) and the connecting block (4), and an L-shaped plate (13) being fixedly connected to a wall surface of the splicing plate (14) near the brush (15); A pulling mechanism for pulling the three arc-shaped scraping blocks (8) to move, the pulling mechanism being arranged between the connecting ring (9) and the rear cover (3); the pulling mechanism comprising two guide posts (20), the two guide posts (20) being symmetrically fixedly connected to the side wall of the connecting ring (9) away from the arc-shaped scraping block (8) in an upper and lower manner, the two guide posts (20) being movable and penetrating the rear cover (3), the ends of the two guide posts (20) away from the connecting ring (9) being fixedly connected to a pulling block (5), the pulling block (5) being fitted to the middle part of the side wall of the rear cover (3) away from the outer shell (2), the outer walls of the two guide posts (20) being slidably sleeved with springs (19), the two springs (19) being fixedly connected between the connecting ring (9) and the rear cover (3); Three lubrication mechanisms, used for lubricating the outer wall of the commutator (16) to reduce mechanical friction, the three lubrication mechanisms being respectively arranged on the plate walls of the three L-shaped plates (17) away from the connecting ring (9); Three blocking members, used for driving the three arc-shaped scrapers (8) to approach the commutator (16) so as to facilitate the three arc-shaped scrapers (8) to clean the outer wall of the commutator (16), the three blocking members being respectively arranged between the three L-shaped plates (17) and the rear cover (3); The elastic component comprises an L-shaped block 1 (23), the L-shaped block 1 (23) being fixedly connected to an end of the connecting rod (18) away from the arc-shaped scraper block (8), a support column (28) being slidably inserted through a plate wall of the L-shaped block 1 (23) away from the connecting rod (18), an end of the support column (28) close to the connecting rod (18) being fixedly connected to an L-shaped block 2 (24), the L-shaped block 2 (24) being fitted with the L-shaped block 1 (23), a wall surface of the L-shaped block 2 (24) away from the L-shaped block 1 (23) being fixedly connected to a side wall of the connecting ring (9) corresponding to the arc-shaped scraper block (8), a spring 3 (27) being slidably sleeved on an outer wall of the support column (28), the spring 3 (27) being fixedly connected between the L-shaped block 2 (24) and the L-shaped block 1 (23).

2. The compact motor with tight internal arrangement according to claim 1, characterized in that: The lubrication mechanism comprises an arc-shaped shell (7), the arc-shaped shell (7) being arranged at a side of the arc-shaped scraper block (8) away from the connecting rod (18), an elastic component being arranged between the arc-shaped shell (7) and the second L-shaped plate (17), an oil injection mechanism being arranged on the outer arc surface of the arc-shaped shell (7), an arc-shaped sponge block (26) being fixedly connected to the inner arc surface of the arc-shaped shell (7), a plurality of holes (33) being penetrated through the inner arc surface of the arc-shaped shell (7), an arc-shaped rubber plate (34) being attached to the inner lower arc surface of the arc-shaped shell (7), and a release mechanism being arranged between the arc-shaped rubber plate (34) and the arc-shaped shell (7).

3. The compact motor with tight internal arrangement according to claim 2, characterized in that: The elastic component comprises a splicing column (30), wherein the splicing column (30) is slidably inserted into the wall of the L-shaped plate 2 (17) away from the connecting ring (9), and one end of the splicing column (30) close to the connecting rod (18) is fixedly connected to the middle part of the outer arc surface of the arc shell (7), and a spring 4 (29) is slidably sleeved on the outer wall of the splicing column (30), and the spring 4 (29) is fixedly connected between the L-shaped plate 2 (17) and the arc shell (7).

4. The compact motor with tight internal arrangement according to claim 3, characterized in that: The oil injection mechanism comprises an oil injection pipe (21), the oil injection pipe (21) being connected to the outer arc surface of the arc-shaped shell (7) near the splicing column (30), and a pipe plug (22) being slidably inserted into the pipe opening of the oil injection pipe (21) away from the arc-shaped shell (7).

5. The compact motor with tight internal arrangement according to claim 2, characterized in that: The release mechanism comprises a cylinder (31) and three springs (32). The cylinder (31) is fixedly inserted in the middle of the wall of the arc-shaped rubber plate (34). One end of the cylinder (31) corresponding to the commutator (16) is movable and passes through the arc-shaped shell (7) and the arc-shaped sponge block (26) in sequence. One of the springs (32) is fixedly connected between the end of the cylinder (31) away from the commutator (16) and the inner upper arc surface of the arc-shaped shell (7). The other two springs (32) are respectively fixedly connected between the outer arc surface of the arc-shaped rubber plate (34) near the two side edges and the inner upper arc surface of the arc-shaped shell (7).

6. The compact motor with tight internal arrangement according to claim 1, characterized in that: The blocking member comprises an L-shaped plate (10), one end of the L-shaped plate (10) being fixedly connected to the side wall of the rear cover (3) corresponding to the housing (2), and the end of the L-shaped plate (10) away from the rear cover (3) being in contact with the inclined wall of the second L-shaped plate (17) near the connecting rod (18).

7. The compact motor with tight internal arrangement according to claim 1, characterized in that: The included angle of the L-shaped plate 2 (17) and the included angle of the L-shaped plate 1 (13) are both obtuse angles.

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