Series excited motor for high-power garden equipment

Abstract

The invention relates to the technical field of electric equipment, in particular to a series excited motor for high-power garden equipment, which comprises a lower bracket and an upper bracket, a motor rotor is arranged between the upper bracket and the lower bracket, a lower output shaft of the motor rotor penetrates through the lower bracket to extend out, and a rotating disc is coaxially and fixedly mounted on the output shaft of a motor body. A plurality of arc-shaped plates are circularly distributed on the end surface, facing the lower bracket, of the rotating disc; supporting corners are arranged at the four corners of the upper support, and a butt joint groove is formed in the lower support. The upper support is provided with two electric brush grooves, and electric brush assemblies are fixedly installed in the two electric brush grooves. The supporting corners are arranged at the four corners of the upper support correspondingly, and when the upper support is installed above the lower support, the protrusions below the supporting corners extend into the multiple butt joint grooves in the lower support, so that the upper support and the lower support are stably connected, deformation of the upper support and the lower support is avoided, and damage to the motor caused by deformation of the upper support and the lower support is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electric equipment, and in particular to a series-excited motor for high-power gardening equipment. Background Art

[0002] A series motor, also known as a DC motor in which the excitation power supply is connected in series between the armature and the armature terminals, is a special DC motor. The advantage of a series motor is that it has a large starting torque and is suitable for systems with large loads or that require frequent starting and stopping, such as large and medium-sized equipment in gardening equipment. At the same time, since series-excited motors are often needed to be used in high-power situations, the front and rear brackets of traditional series-excited motors (i.e., the upper bracket and the lower bracket in the present invention) are directly connected to the base and fixed with two bolts. During long-term use, the force of the front and rear brackets is offset, and the entire bracket is deformed, which shortens the service life of the series-excited motor. Summary of the invention

[0003] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a series-excited motor for high-power gardening equipment, which can effectively solve the problem that the front and rear brackets of the series-excited motor in the prior art are directly connected to the base and fixed with two bolts, the force of the front and rear brackets is offset during long-term use, and the entire bracket is easily deformed, which shortens the service life of the series-excited motor.

[0004] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a series-excited motor for high-power gardening equipment, comprising a lower bracket and an upper bracket, a motor rotor is arranged between the upper bracket and the lower bracket, lower ventilation holes are arranged on both sides of the lower bracket, an output shaft below the motor rotor passes through the lower bracket and extends out, a rotating disk is coaxially fixedly installed on the output shaft of the motor body, a plurality of arc plates are distributed in a circular shape on the end surface of the rotating disk facing the lower bracket, and the arc plates are used to guide the airflow inside the upper bracket and the lower bracket to flow upward during the rotation of the rotating disk; The upper bracket is provided with support angles at four corners, and the lower bracket is provided with a docking groove for the lower end of the support angle to pass through. When the upper bracket is installed on the lower bracket, the protrusion under the support angle is inserted into the docking groove; The upper bracket is provided with two brush slots, which are symmetrically distributed on the upper bracket. Brush assemblies are fixedly installed inside the two brush slots. The brush assembly is used to push one end of the brush to contact the upper end of the motor rotor.

[0005] Furthermore, upper ventilation holes are provided on both sides of the upper bracket where no brush slots are provided, and the upper ventilation holes and lower ventilation holes are distributed on the same side of the motor rotor, and the arc plate as a whole presents a profile with a high middle portion and low sides.

[0006] Furthermore, a rotor slot is reserved inside the lower bracket, the motor rotor is rotatably mounted inside the rotor slot, the motor rotor and the rotor slot are interference fit, and the rotor slot is communicated with the lower ventilation hole.

[0007] Furthermore, an inner liner frame is fixedly installed between the upper bracket and the lower bracket, and the inner liner frame is used to limit the inclination of the motor rotor, and the outer side of the inner liner frame is used to limit the installation position of the stator winding.

[0008] Furthermore, a plurality of clamping columns are fixedly mounted on the upper bracket, and the clamping columns are used to fix the motor wires.

[0009] Furthermore, the brush assembly includes a sliding shell and a fixed plate, the sliding shell is detachably installed inside the brush slot, a graphite brush is slidably installed inside the sliding shell, the rear end of the sliding shell is opened, the fixed plate is fixedly installed at the rear end of the sliding shell by bolts, and a pushing assembly for pushing the graphite brush close to the motor rotor is provided on the fixed plate.

[0010] Furthermore, the pushing assembly includes a mounting plate, on which a rotating rod is rotatably mounted, the other end of the rotating rod extends to the tail of the graphite brush, and a bending plate is provided on the side of the mounting plate facing the graphite brush, and a spring is provided on the bending plate, the other end of the spring is connected to a side of the middle part of the rotating rod close to the mounting plate, and the spring is used to drive the rotating rod to rotate clockwise.

[0011] Furthermore, a rotating shaft is provided on the mounting plate, and the rotating rod is rotatably connected to the mounting plate with the rotating shaft as the axis. A gear is also fixedly installed on the rotating shaft, and a tooth row is also slidably installed on the mounting plate. The tooth row is meshed with the gear for transmission, and one end of the tooth row extends out of the side of the fixed plate, and a scale plate for displaying the extension length of the tooth row is fixedly installed on the side of the fixed plate.

[0012] Furthermore, a guide rail is fixedly mounted on the mounting plate, a sliding block is fixedly mounted below the tooth row, the lower side of the sliding block is slidably matched with the guide rail, and the sliding block is used to guide the tooth row to slide.

[0013] Furthermore, a push plate is rotatably mounted on one end of the rotating rod away from the mounting plate, and the push plate is used to abut against the tail of the graphite brush to push the graphite brush to move toward the motor rotor.

[0014] Beneficial Effects Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects: 1. The present invention provides support angles at the four corners of the upper bracket, and provides protrusions below the support angles. When the upper bracket is installed above the lower bracket, the protrusions below the support angles extend into a plurality of docking grooves on the lower bracket, so that the upper bracket and the lower bracket are stably connected, which can prevent the upper bracket and the lower bracket from being deformed when the motor drives a large torque device, thereby preventing the motor from being damaged.

[0015] 2. In the present invention, a gear is arranged on the rotating shaft. When the rotating rod rotates, the rotating shaft is driven to rotate. When the rotating shaft rotates, the gear is driven to rotate. When the gear rotates, the gear row is driven to slide on the side of the rotating shaft, so that one end of the gear row can extend further out of the side of the fixed plate. The motor maintenance personnel can judge the degree of wear of the graphite brush according to the length of the gear row extending out of the fixed plate. The degree of wear of the graphite brush can be judged without disassembling the motor. The degree of friction of the graphite brush can be timely discovered and replaced in time when appropriate.

[0016] 3. In the present invention, a sliding block is arranged below the tooth row, and a guide rail is arranged on the mounting plate, which can guide the tooth row to move. At the same time, since the sliding block is arranged below the tooth row, when the rotating rod rotates to the extreme position (that is, when the graphite brush is worn out), the sliding block can abut against the side of the fixed plate, which can limit the rotating rod and prevent the rotating rod from continuing to rotate, and prevent the electrical connection part of the tail of the graphite brush from abutting against the motor rotor, thereby avoiding damage to the motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the overall structure of the upper bracket of the present invention; Figure 4 It is a schematic diagram of the structure of the upper bracket of the present invention from a bottom-up perspective; Figure 5 This is a schematic diagram of the structure in which the motor rotor of the present invention is installed inside the lower bracket; Figure 6 It is a schematic diagram of the overall structure of the brush assembly of the present invention; Figure 7An exploded view of the brush assembly of the present invention; Figure 8 It is a schematic diagram of the internal structure of the fixing plate of the present invention; Fig. 9 For the present invention Figure 8 A local enlarged structural schematic diagram; Fig.10 It is a schematic diagram of the top view structure of the fixing plate of the present invention.

[0019] The numbers in the figure represent: 1. Lower bracket; 101. Lower ventilation hole; 102. Docking slot; 103. Rotor slot; 2. Upper bracket; 201. Upper ventilation hole; 202. Brush slot; 21. Clamping column; 22. Support angle; 2201. Connecting through hole; 23. Lining frame; 24. Protruding column; 3. Brush assembly; 31. Sliding shell; 311. Graphite brush; 32. Fixed plate; 33. Rotating rod; 331. Pushing plate; 34. Spring; 35. Mounting plate; 351. Guide rail; 36. Rotating shaft; 37. Gear; 38. Gear row; 381. Scale plate; 382. Sliding block; 39. Bending plate; 4. Motor rotor; 41. Rotating disk; 411. Fan plate; 42. Winding. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] When the series-excited motor for high-power garden equipment is used, since it needs to drive the heavy-weight shaft to rotate, the original upper bracket 2 is directly connected to the lower bracket 1 and fixed with two bolts. However, this installation method causes force offset when driving high-torque equipment, causing the entire bracket to deform, shortening the life of the upper bracket 2 and the lower bracket 1.

[0023] To this end, an embodiment of the present invention provides a series-excited motor for high-power gardening equipment, the purpose of which is at least to stably fix the upper bracket 2 on the lower bracket 1 by setting four support angles 22, thereby avoiding deformation of the upper bracket 2 and the lower bracket 1 when driving high-torque equipment, and making the upper bracket 2 and the lower bracket 1 more stable.

[0024] Embodiment: A series motor for high-power garden equipment, such as Figure 1 - Figure 5 As shown, it includes a lower bracket 1 and an upper bracket 2, a motor rotor 4 is arranged between the upper bracket 2 and the lower bracket 1, lower ventilation holes 101 are arranged on both sides of the lower bracket 1, the lower output shaft of the motor rotor 4 extends through the lower bracket 1, and a rotating disk 41 is coaxially fixedly installed on the output shaft of the motor body 4, and a plurality of arc plates 411 are distributed in a circular shape on the end surface of the rotating disk 41 facing the lower bracket 1, and the arc plates 411 are used to guide the airflow inside the upper bracket 2 and the lower bracket 1 to flow upward during the rotation of the rotating disk 41; The upper bracket 2 is provided with support angles 22 at the four corners, and the lower bracket 1 is provided with a docking groove 102 for the lower end of the support angle 22 to pass through. When the upper bracket 2 is installed on the lower bracket 1, the protrusion under the support angle 22 is inserted into the docking groove 102; The upper bracket 2 is provided with two brush slots 202 symmetrically distributed on the upper bracket 2 , and brush assemblies 3 are fixedly installed inside the two brush slots 202 , and the brush assembly 3 is used to push one end of the brush to contact the upper end of the motor rotor 4 .

[0025] In the present invention, by respectively setting support angles 22 at the four corners of the upper bracket 2 and setting protrusions below the support angles 22, when the upper bracket 2 is installed above the lower bracket 1, the protrusions below the support angles 22 extend into the multiple docking grooves 102 on the lower bracket 1, so that the upper bracket 2 and the lower bracket 1 are stably connected, which can avoid deformation of the upper bracket 2 and the lower bracket 1 when the motor drives a large torque device, thereby avoiding damage to the motor.

[0026] It should be noted that a connecting through hole 2201 is provided on the support angle 22, and the connecting through hole 2201 is for the external connecting bolt to pass through. A threaded hole is provided inside the docking groove 102. When the upper bracket 2 is installed on the lower bracket 2, the bolt passes through the connecting through hole 2201 and is screwed into the threaded hole.

[0027] Furthermore, if Figure 2 As shown, upper ventilation holes 201 are provided on both sides of the upper bracket 2 where no brush slots 202 are provided. The upper ventilation holes 201 and the lower ventilation holes 101 are distributed on the same side of the motor rotor 4. The arc plate 411 as a whole presents a profile with a high middle and low sides.

[0028] Among them, by respectively arranging upper ventilation holes 201 and lower ventilation holes 101 on the upper bracket 2 and the lower bracket 1, and the upper ventilation holes 201 and the lower ventilation holes 101 are located on the same side of the motor rotor 4, when the arc plate 411 drives the airflow to flow upward, the external gas can enter the interior of the upper bracket 2 and the lower bracket 1 from the upper ventilation holes 201 and the lower ventilation holes 101 respectively, so that the airflow flows through the inner cavity of the motor rotor 4 and the upper bracket 2 and the lower bracket 1, and the motor rotor 4, the upper bracket 2 and the lower bracket 1 can be smoothly cooled, thereby improving the heat dissipation efficiency of the motor rotor (in the prior art, the fan rotates to stir the airflow, and the airflow flows from the outside of the rotor and does not directly contact the motor rotor 4).

[0029] Furthermore, if Figure 2 , 3 As shown, a rotor slot 103 is reserved inside the lower bracket 1 , and the motor rotor 4 is rotatably mounted inside the rotor slot 103 . The motor rotor 4 and the rotor slot 103 are interference fit, and the rotor slot 103 is communicated with the lower ventilation hole 101 .

[0030] Among them, by setting the rotor slot 103 inside the lower bracket 1, the motor rotor 4 and the inner wall of the rotor slot 103 are interference fit. When the airflow flows upward, it can pass through the space between the rotor slot 103 and the motor rotor 4, and can timely take away the heat generated on the surface of the motor rotor 4, thereby avoiding the accumulation of heat in the motor rotor 4 and the rotor slot 103.

[0031] Furthermore, if Figure 2 As shown, an inner liner frame 23 is fixedly installed between the upper bracket 2 and the lower bracket 1. The inner liner frame 23 is used to limit the tilting of the motor rotor 4, and the outer side of the inner liner frame 23 is used to limit the installation position of the stator winding.

[0032] Among them, the setting of the liner frame 23 can conveniently limit the motor rotor 4, avoid the motor rotor 4 from tilting during the rotation process, and ensure the coaxiality of the motor rotor 4 during the rotation process.

[0033] Furthermore, if Figure 3 As shown, a plurality of clamping columns 21 are fixedly mounted on the upper bracket 2, and the clamping columns 21 are used to fix the motor wires.

[0034] Among them, by arranging multiple clamping columns 21 on the upper bracket 2, the excess wires of the motor can be conveniently wound around the multiple clamping columns 21 during use of the motor, which can prevent the motor wires from being dragged on the ground at will, and can facilitate the daily use of the motor. A protruding column 24 is also arranged on the upper bracket 2, which can cooperate with the clamping column 21 to fix the position of the wire.

[0035] Furthermore, if Figure 6 , 7As shown, the brush assembly 3 includes a sliding shell 31 and a fixed plate 32. The sliding shell 31 is detachably installed inside the brush slot 202. A graphite brush 311 is slidably installed inside the sliding shell 31. The tail of the sliding shell 31 is opened. The fixed plate 32 is fixedly installed at the tail of the sliding shell 31 by bolts. A pushing assembly for pushing the graphite brush 311 close to the motor rotor 4 is provided on the fixed plate 32.

[0036] Among them, by installing the fixing plate 32 at the rear end of the sliding shell 31 through bolts, and providing a pushing component for pushing the graphite brush 311 on the fixing plate 32, the graphite brush 311 sliding inside the sliding shell 31 can always be kept against the side of the motor rotor 4, thereby ensuring the connection between the graphite brush 311 and the motor rotor 4.

[0037] Furthermore, if Figure 8 , 9 As shown, the pushing assembly includes a mounting plate 35, on which a rotating rod 33 is rotatably mounted, and the other end of the rotating rod 33 extends to the tail of the graphite brush 311. A bending plate 39 is provided on the side of the mounting plate 35 facing the graphite brush 311, and a spring 34 is provided on the bending plate 39. The other end of the spring 34 is connected to a side of the middle of the rotating rod 33 close to the mounting plate 35, and the spring 34 is used to drive the rotating rod 33 to rotate clockwise.

[0038] It should be noted that the middle portion of the rotating rod 33 is convex (eg Fig.10 As shown in the figure, it is in the shape of an arch bridge), at the connection between the spring 34 and the rotating rod 33, it is located at the raised edge. As the graphite brush 311 wears, the rotating rod 33, driven by the spring 34, will push the graphite brush 311 to move toward the motor rotor 4. At the same time, as the rotating rod 33 rotates, although the tension applied by the spring 34 to the rotating rod 33 will decrease, as the rotating rod 33 rotates, the power arm L1 applied by the spring 34 to the rotating rod 33 will gradually increase, which can offset the pressure reduction caused by the contraction of the spring 34 (power arm L1×spring tension=power arm L2×pressure applied to the graphite brush 311), so that the pressure applied by the rotating rod 33 to the graphite brush 311 remains unchanged, and the pressure of the graphite brush 311 against the motor rotor 4 remains constant, thereby avoiding insufficient pressure to push the graphite brush 311 due to the reduction of the elastic force of the spring 34 in the later stage of the use of the graphite brush 311.

[0039] It should be noted that the series-excited motor, also known as a DC motor in which the excitation power supply is connected in series on the armature and armature terminals, is a special DC motor. The advantages of the series-excited motor are large starting torque, suitable for systems with large loads or frequent starting and stopping; wide speed regulation range, easy to achieve precise control; good performance at low speed and high torque; the disadvantage of the series-excited motor is that the maintenance cost is high, and the commutator and graphite brush 311 need to be maintained regularly, so it is particularly important to understand the degree of wear of the graphite brush 311 in a timely manner.

[0040] Furthermore, if Figure 7 , 10 As shown, a rotating shaft 36 is provided on the mounting plate 35, and the rotating rod 33 is rotatably connected to the mounting plate 35 with the rotating shaft 36 as the axis. A gear 37 is also fixedly installed on the rotating shaft 36, and a gear row 38 is also slidably installed on the mounting plate 35. The gear row 38 is meshed with the gear 37 for transmission, and one end of the gear row 38 extends out of the side of the fixed plate 32. A scale plate 381 for displaying the extension length of the gear row 38 is fixedly installed on the side of the fixed plate 32.

[0041] Among them, by arranging the gear 37 on the rotating shaft 36, when the rotating rod 33 rotates, it will drive the rotating shaft 36 to rotate, and when the rotating shaft 36 rotates, it will drive the gear 37 to rotate. When the gear 37 rotates, it will drive the tooth row 38 to slide on the side of the rotating shaft 36, so that one end of the tooth row 38 can extend further out of the side of the fixed plate 32. The motor maintenance personnel can judge the degree of wear of the graphite brush 311 according to the length of the tooth row 38 extending out of the fixed plate 32. The degree of wear of the graphite brush 311 can be judged without disassembling the motor, and the degree of friction of the graphite brush 311 can be timely discovered and replaced in time when appropriate.

[0042] Furthermore, if Figure 8 , 9 As shown, a guide rail 351 is fixedly installed on the mounting plate 35, and a sliding block 382 is fixedly installed below the gear row 38. The sliding block 382 is slidably matched with the guide rail 351 below, and the sliding block 382 is used to guide the gear row 38 to slide.

[0043] Among them, a sliding block 382 is arranged below the tooth row 38, and a guide rail 351 is arranged on the mounting plate 35, which can guide the tooth row 38 to move. At the same time, since the sliding block 382 is arranged below the tooth row 38, when the rotating rod 33 rotates to the extreme position (that is, when the graphite brush 311 is worn out), the sliding block 382 can abut against the side of the fixed plate 32, which can limit the rotating rod 33 to prevent the rotating rod 33 from continuing to rotate, and prevent the electrical connection part of the tail of the graphite brush 311 from abutting against the motor rotor 4, thereby avoiding damage to the motor rotor 4.

[0044] Furthermore, if Figure 8 As shown, a push plate 331 is rotatably mounted on one end of the rotating rod 33 away from the mounting plate 35 , and the push plate 331 is used to abut against the tail of the graphite brush 311 to push the graphite brush 311 to move toward the motor rotor 4 .

[0045] Working principle: During the rotation of the series-excited motor, the motor rotor 4 drives the rotating disk 41 located below the lower bracket 1 to rotate counterclockwise, so that the arc-shaped plate 411 on the rotating disk 41 draws air inward, so that an overpressure environment is generated in the middle of the rotating disk 41. The airflow at the center of the rotating disk 41 drives the airflow upward, so that the airflow can flow upward and pass between the motor rotor 4 and the inner wall of the rotor slot 103, and then be discharged from the upper ventilation hole 201 and the lower ventilation hole 101 respectively. During the flow process, the hot air between the motor rotor 4 and the rotor slot 103 is taken away, so that heat is conveniently dissipated. In addition, during the upward flow of the airflow, the airflow at the upper ventilation hole 201 will also drive the discharge of carbon powder generated by the wear of the motor rotor 4 and the graphite brush 311; When inspecting the series-excited motor, the degree of wear of the graphite brush 311 can be determined by observing the position of the tooth row 38 on the scale plate 381. The degree of wear of the graphite brush 311 can be intuitively seen without disassembling the graphite brush 311. According to the degree of wear, it can be determined at an appropriate time period to replace the graphite brush 311.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A series motor for high-power garden equipment, characterized in that: The motor body (4) comprises a lower bracket (1) and an upper bracket (2), wherein a motor rotor (4) is arranged between the upper bracket (2) and the lower bracket (1), lower ventilation holes (101) are arranged on both sides of the lower bracket (1), an output shaft below the motor rotor (4) passes through the lower bracket (1) and extends out, a rotating disk (41) is coaxially fixedly mounted on the output shaft of the motor body (4), a plurality of arc plates (411) are distributed in a circular shape on the end surface of the rotating disk (41) facing the lower bracket (1), and the arc plates (411) are used to guide the internal airflow of the upper bracket (2) and the lower bracket (1) to flow upwards during the rotation of the rotating disk (41); The upper bracket (2) is provided with support angles (22) at four corners, the lower bracket (1) is provided with a docking groove (102) for the lower end of the support angle (22) to pass through, and when the upper bracket (2) is mounted on the lower bracket (1), the protrusion below the support angle (22) is inserted into the docking groove (102); The upper bracket (2) is provided with two brush slots (202), the two brush slots (202) are symmetrically distributed on the upper bracket (2), and a brush assembly (3) is fixedly installed inside the two brush slots (202), and the brush assembly (3) is used to push one end of the brush to contact the upper end of the motor rotor (4).

2. A series motor for high-power gardening equipment according to claim 1, characterized in that: Upper ventilation holes (201) are provided on both sides of the upper bracket (2) where no brush slots (202) are provided. The upper ventilation holes (201) and the lower ventilation holes (101) are distributed on the same side of the motor rotor (4). The arc-shaped plate (411) as a whole presents a profile with a high middle portion and low sides.

3. A series motor for high-power gardening equipment according to claim 1, characterized in that: A rotor slot (103) is left inside the lower bracket (1), the motor rotor (4) is rotatably mounted inside the rotor slot (103), the motor rotor (4) and the rotor slot (103) are interference fit, and the rotor slot (103) is in communication with the lower ventilation hole (101).

4. A series motor for high-power gardening equipment according to claim 1, characterized in that: An inner liner frame (23) is also fixedly mounted between the upper bracket (2) and the lower bracket (1); the inner liner frame (23) is used to limit the tilting of the motor rotor (4); and the outer side of the inner liner frame (23) is used to limit the installation position of the stator winding.

5. A series motor for high-power gardening equipment according to claim 1, characterized in that: A plurality of clamping columns (21) are fixedly mounted on the upper bracket (2), and the clamping columns (21) are used to fix the motor wires.

6. A series motor for high-power garden equipment according to claim 1, characterized in that: The brush assembly (3) comprises a sliding shell (31) and a fixing plate (32); the sliding shell (31) is detachably mounted inside the brush slot (202); a graphite brush (311) is slidably mounted inside the sliding shell (31); the rear end of the sliding shell (31) is provided with an opening; the fixing plate (32) is fixedly mounted on the rear end of the sliding shell (31) by means of bolts; and a pushing assembly for pushing the graphite brush (311) close to the motor rotor (4) is provided on the fixing plate (32).

7. A series motor for high-power gardening equipment according to claim 6, characterized in that: The pushing assembly comprises a mounting plate (35), a rotating rod (33) is rotatably mounted on the mounting plate (35), the other end of the rotating rod (33) extends to the tail of the graphite brush (311), a bending plate (39) is arranged on the side of the mounting plate (35) facing the graphite brush (311), a spring (34) is arranged on the bending plate (39), the other end of the spring (34) is connected to a side of the middle of the rotating rod (33) close to the mounting plate (35), and the spring (34) is used to drive the rotating rod (33) to rotate clockwise.

8. A series motor for high-power gardening equipment according to claim 7, characterized in that: The mounting plate (35) is provided with a rotating shaft (36), the rotating rod (33) is rotatably connected to the mounting plate (35) with the rotating shaft (36) as an axis, a gear (37) is fixedly mounted on the rotating shaft (36), a gear row (38) is slidably mounted on the mounting plate (35), the gear row (38) and the gear (37) are meshed for transmission, one end of the gear row (38) extends out of a side surface of the fixing plate (32), and a scale plate (381) for displaying the extension length of the gear row (38) is fixedly mounted on the side surface of the fixing plate (32).

9. A series motor for high-power gardening equipment according to claim 8, characterized in that: A guide rail (351) is fixedly mounted on the mounting plate (35), a sliding block (382) is fixedly mounted below the tooth row (38), the lower portion of the sliding block (382) is slidably matched with the guide rail (351), and the sliding block (382) is used to guide the tooth row (38) to slide.

10. A series motor for high-power gardening equipment according to claim 9, characterized in that: A push plate (331) is rotatably mounted on one end of the rotating rod (33) away from the mounting plate (35); the push plate (331) is used to abut against the tail of the graphite brush (311) to push the graphite brush (311) to move toward the motor rotor (4).

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