Compact mower motor

Abstract

The utility model discloses a compact mower motor which comprises a main shell, a stator support is connected above the main shell, the stator support is fixedly connected with a stator assembly, one side of the main shell close to the stator support is provided with an installation opening, one side of the main shell far away from the stator support is provided with a rotor support, and the rotor support is fixedly connected with the stator assembly. The rotor support is rotationally connected with a rotor assembly, a mounting shaft extending downwards is arranged on the side, close to the mounting opening, of the stator support, a rotor penetrating hole is formed in the mounting shaft, and the rotor assembly half surrounds the stator assembly. The utility model provides a compact mower motor, which can ensure the compactness of the overall structure, reduce the overall size of a mower, facilitate disassembly and maintenance, ensure high torque and adapt to the use scene of the mower.

Description

TECHNICAL FIELD

[0001] The utility model relates to the lawn mower technical field especially, relates to a compact lawn mower motor. BACKGROUND

[0002] For example, the publication number "CN222216480U" discloses "a side hanging type high -power electric mower", including brushless motor, support frame and mowing head, the support frame is rotatably connected with the transmission shaft for brushless motor transmission to mowing head, the support frame is connected between brushless motor and mowing head, and brushless motor includes shell, main shaft, controller and transmission assembly, the shell is cylindrical, and main shaft, transmission assembly and controller are all arranged in the shell, one end of main shaft is fixedly connected with fan, and heat sink is fixedly connected in the shell. However, in practical application, the overall structure of the motor is relatively complex, the volume structure is big, and it is not convenient to install, disassemble and maintain, and at the same time, it cannot adapt to the scene of high torque. SUMMARY

[0003] In view of the problems of the prior art in the background art that the volume and structure are not suitable for the scene of high torque and small volume, and maintenance is complex, the utility model provides a compact lawn mower motor, which can ensure the compactness of the overall structure, reduce the overall volume of the lawn mower, facilitate disassembly and maintenance, and at the same time, can ensure high torque and adapt to the use scene of the lawn mower.

[0004] To achieve the above object, the utility model adopts the following technical scheme.

[0005] A compact lawn mower motor, comprising a main shell, a stator support connected above the main shell, a stator assembly fixedly connected to the stator support, an installation opening provided on one side of the main shell close to the stator support, a rotor support provided on one side of the main shell away from the stator support, a rotor assembly rotatably connected to the rotor support, an installation shaft extending downward provided on one side of the stator support close to the installation opening, a rotor hole provided in the installation shaft, and the rotor assembly semi-enclosing the stator assembly.

[0006] The traditional mower usually uses an inner rotor motor as a power source, and its typical structure includes an inner rotor, a stator winding and a matching transmission system (such as a gear box or a belt pulley). The inner rotor motor outputs power through high-speed rotation, drives the blade cutting operation after reducing the speed and increasing the torque through a speed reduction device. This design is widely used in the industry, but through long-term practice and experimental analysis, it is found that it has the following inherent defects: the inner rotor motor has limited output torque due to the small rotor radius, and must rely on the transmission components such as the reduction box and the shaft coupling to match the cutting torque required by the blade. However, such additional mechanical structures cause the following problems: energy loss is aggravated: the friction of the transmission link, the gear meshing gap and other factors cause additional mechanical energy loss, and the overall efficiency is reduced by 10%-15%; the volume and weight increase: the integration of the reduction box and the attached components makes the overall structure bulky, which is not conducive to the lightweight design of handheld or light-duty mowers; the failure rate increases: mechanical failures such as gear wear and belt slip occur frequently, significantly increasing maintenance costs. The starting performance is insufficient: the torque output is weak in the low speed range of the motor, and the blade is prone to stall when the load suddenly changes, requiring repeated start-stop to resume work, which increases energy consumption and motor temperature rise. The cutting efficiency is limited: high speed needs to be reduced to the working speed of the blade through the speed reduction device, but the transmission loss reduces the effective torque actually transmitted to the blade, making it difficult to cut high-density vegetation. The integrated design of the inner rotor motor and the reduction box makes maintenance difficult, for example: the stator winding maintenance requires disassembly of the transmission system, increasing labor and time costs; the sealing requirement is strict, multiple protective structures are required to prevent grass clippings from entering the motor interior, further increasing manufacturing costs.

[0007] Therefore, based on the above-mentioned defects, the shell of the motor is divided into a main shell and a stator support and a rotor support, the stator support is arranged above the main shell, the rotor support is arranged below the main shell, an installation opening is arranged on one side of the main shell close to the stator support, and the stator assembly is connected through the stator support and the rotor assembly is connected through the rotor support, so that the installation of the stator assembly and the rotor assembly is separated. Since the stator assembly is half-enclosed by the rotor assembly, the torque of the rotor is increased, which can better adapt to the working scene of the mower, improve the weeding efficiency, and obtain better starting performance.

[0008] As a preferred, the stator support is provided with an upper installation slot on the side away from the installation opening, and an upper bearing is arranged in the upper installation slot, and the upper installation slot is communicated with the rotor perforation. The upper installation slot arranged on the side of the stator support away from the installation opening can connect the upper bearing, and since the rotor perforation is arranged on the stator support, the rotor assembly can pass through the rotor perforation so that the main shaft part is located in the upper installation slot and connected with the upper bearing, so that the rotor assembly can rotate more flexibly.

[0009] Preferably, the upper mounting groove is provided with a convex edge on the side away from the mounting opening, and a snap spring is connected to the inner wall of the convex edge. The convex edge allows space for mounting the snap spring above the upper mounting groove, thereby ensuring the fixing constraint effect on the upper bearing.

[0010] Preferably, the upper mounting groove is provided with a convex edge on the side away from the mounting opening, and a snap spring is connected to the inner wall of the convex edge. The convex edge allows space for mounting the snap spring above the upper mounting groove, thereby ensuring the fixing constraint effect on the upper bearing.

[0011] Preferably, the rear cover and the stator support are connected with a fixing bolt on the side away from the snap buckle. The fixing bolt is provided on the rear cover and the stator support, which can ensure the connection stability between the rear cover and the stator, and the pre-connection between the snap buckle and the snap opening can ensure the connection stability during the connection of the fixing bolt.

[0012] Preferably, the rotor support includes a connecting plate provided at the bottom of the main shell, the connecting plate is connected with a lower mounting groove, the lower mounting groove is connected with a lower bearing, and the lower bearing is connected with a rotor assembly. The connecting plate is provided on the rotor support and at the center of the main shell, so that the lower bearing mounted on the lower mounting groove can be connected with the main shaft in the rotor support, and the rotor assembly can be connected with the upper bearing and the lower bearing, thereby ensuring the flexible rotation and uniformity of the rotor assembly.

[0013] Preferably, the rotor assembly includes a main shaft, a limiting plate provided on the main shaft and abutting against the upper part of the lower bearing, and a fan pressing plate connected with the main shaft and abutting against the lower part of the lower bearing. The limiting plate and the fan pressing plate are provided on the main shaft, and the limiting plate and the fan pressing plate clamp the lower bearing in the middle position, thereby ensuring the fixing stability of the lower bearing.

[0014] Preferably, the rotor assembly includes a main shaft, a magnetic sheet mounting plate connected with the main shaft on the side away from the mounting opening, the magnetic sheet mounting plate semi-wraps the stator assembly, and a magnetic sheet is provided on the magnetic sheet mounting plate. The main shaft of the rotor assembly is connected with the magnetic sheet mounting plate, and the magnetic sheet is provided on the magnetic sheet mounting plate. The magnetic attraction effect between the magnetic sheet and the stator assembly can drive the magnetic sheet mounting plate to rotate, thereby driving the main shaft to rotate. The magnetic sheet mounting plate is semi-wrapped with the stator assembly, thereby forming a structure in which the stator assembly is located inside the magnetic sheet mounting plate, and the magnetic sheet mounting plate can generate a larger torque, thereby driving the main shaft to rotate and driving the blade to mow.

[0015] As preferred, a connecting sleeve is arranged on the main shaft, an extension plate is connected between the connecting sleeve and the magnetic sheet mounting plate, a plurality of upper openings are arranged on the extension plate, the rotor support comprises a connecting plate arranged below the extension plate, a plurality of lower openings are arranged on the connecting plate, and the upper openings and the lower openings are ventilated. The connecting sleeve and the main shaft are connected through the spline, wherein the extension plate is arranged between the connecting sleeve and the magnetic sheet mounting plate, the upper openings are arranged on the extension plate, the connecting plate is arranged below the extension plate, and the lower openings are arranged on the connecting plate, wherein the lower openings and the upper openings are communicated, air can flow through, so that the heat generated by the rotor assembly and the stator assembly during operation can be dissipated by the fan.

[0016] As preferred, the rotor assembly comprises a main shaft, a thread is arranged on the end of the main shaft away from the mounting opening, a nut is connected on the thread, and a blade pressing plate is connected on the main shaft on the side of the nut close to the mounting opening. The thread can ensure the stability of the connection of the nut, wherein the nut fixes the blade pressing plate on the main shaft, so that the mounting gap is formed between the blade pressing plate and the fan pressing plate for mounting and fixing the blade.

[0017] The beneficial effects of the utility model are as follows:

[0018] (1) The compactness of the overall structure can be ensured, the overall volume of the mower is reduced, disassembly and maintenance are facilitated, and high torque can be ensured, so that the mower can adapt to the use scene;

[0019] (2) The torque during the operation of the mower can be ensured, and the compactness and connection tightness between the components of the mower are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the axial sectional view of the utility model.

[0021] Figure 2 is the partial axial sectional view of the utility model.

[0022] Figure 3 is Figure 2 is the partial enlarged view of B in the figure.

[0023] Figure 4 is Figure 1 is the partial enlarged view of A in the figure.

[0024] Figure 5 is the axial view of the main housing in the utility model.

[0025] In the figure:

[0026] 1 main housing, 11 mounting opening;

[0027] 2. Stator bracket, 21. Stator assembly, 22. Mounting shaft, 23. Rotor through hole, 24. Upper mounting slot, 25. Upper bearing, 26. Raised edge, 27. Snap ring, 29. Engaging opening;

[0028] 3. Rotor support, 31. Connecting plate, 311. Lower opening, 32. Lower mounting groove, 33. Lower bearing;

[0029] 4 Rotor assembly, 41 Main shaft, 42 Limiting plate, 43 Fan pressure plate, 44 Magnetic plate mounting plate, 45 Connecting sleeve, 46 Extension plate, 461 Upper opening, 47 Nut, 48 Blade pressure plate;

[0030] 5. Rear cover, 51. Clip, 52. Fixing bolt. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1:

[0033] like Figure 1 As shown, a compact lawnmower motor includes a main housing 1, a stator bracket 2 connected to the top of the main housing 1, a stator assembly 21 fixedly connected to the stator bracket 2, an installation opening 11 provided on the side of the main housing 1 near the stator bracket 2, a rotor bracket 3 provided on the side of the main housing 1 away from the stator bracket 2, a rotor assembly 4 rotatably connected to the rotor bracket 3, a downwardly extending installation shaft 22 provided on the side of the stator bracket 2 near the installation opening 11, a rotor through hole 23 provided in the installation shaft 22, and the rotor assembly 4 partially surrounds the stator assembly 21.

[0034] The traditional mower usually uses an inner rotor motor as a power source, and its typical structure includes an inner rotor, a stator winding and a matching transmission system (such as a gear box or a belt pulley). The inner rotor motor outputs power through high-speed rotation, drives the blade cutting operation after reducing the speed and increasing the torque through a speed reduction device. This design is widely used in the industry, but through long-term practice and experimental analysis, it is found that it has the following inherent defects: the inner rotor motor has limited output torque due to the small rotor radius, and must rely on the transmission components such as the reduction box and the shaft coupling to match the cutting torque required by the blade. However, such additional mechanical structures cause the following problems: increased energy loss: friction, gear meshing gap and other transmission links cause additional mechanical energy loss, and the overall efficiency is reduced by 10%-15%; increased volume and weight: the integration of the reduction box and the attached components makes the overall structure bulky, which is not conducive to the lightweight design of handheld or light-duty mowers; increased failure rate: mechanical failures such as gear wear and belt slip occur frequently, significantly increasing maintenance costs; insufficient starting performance: the motor has weak torque output in the low speed range, and the blade is prone to stall when the load suddenly changes, requiring repeated start-stop to resume work, which increases energy consumption and motor temperature rise; limited cutting efficiency: high speed needs to be reduced to the blade working speed through a speed reduction device, but the transmission loss reduces the effective torque actually transmitted to the blade, making it difficult to cut high-density vegetation. The integrated design of the inner rotor motor and the reduction box makes maintenance difficult, for example: the stator winding maintenance requires disassembly of the transmission system, increasing labor and time costs; the sealing requirement is strict, multiple protective structures are required to prevent grass clippings from entering the motor interior, further increasing manufacturing costs.

[0035] Therefore, based on the above-mentioned defects, the shell of the motor is divided into a main shell 1 and a stator support 2 and a rotor support 3, the stator support 2 is arranged above the main shell 1, the rotor support 3 is arranged below the main shell 1, the main shell 1 is arranged with a mounting opening 11 on the side close to the stator support 2, and the stator assembly 21 is connected through the stator support 2, and the rotor support 3 connects the rotor assembly 4, so that the installation of the stator assembly 21 and the rotor assembly 4 is separated, and since the stator assembly 21 is half-enclosed by the rotor assembly 4, the torque of the rotor is increased, which can better adapt to the working scene of the mower, improve the weeding efficiency, and obtain better starting performance.

[0036] As shown in Figure 2 The upper installation slot 24 arranged on the side away from the mounting opening 11 of the stator support 2 can connect the upper bearing 25, and since the rotor through hole 23 is arranged on the stator support 2, the rotor assembly 4 can pass through the rotor through hole 23 so that part of the main shaft 41 is located in the upper installation slot 24 and connected with the upper bearing 25, so that the rotor assembly 4 can rotate more flexibly.

[0037] As shown in Figure 1 , 3 , the upper mounting groove 24 is provided with a mounting groove 26 away from the mounting opening 11 side, and the inner wall of the mounting groove 26 is clamped and connected with a clamping spring 27. By setting the mounting groove 26, the upper part of the upper mounting groove 24 can have space to install the clamping spring 27, so as to ensure the fixing constraint effect of the upper bearing 25.

[0038] As shown in Figure 3 , the upper mounting groove 24 is provided with a mounting groove 26 away from the mounting opening 11 side, and the outer wall of the mounting groove 26 is provided with a clamping opening 28, and the mounting groove 26 is clamped and connected with the rear cover 5, and the rear cover 5 is provided with a clamping buckle 51 corresponding to the clamping opening 28, and the clamping buckle 51 is clamped and connected with the clamping opening 28. The mounting groove 26 is provided with a clamping opening 28, which can be clamped and connected with the clamping buckle 51 on the rear cover 5, so as to facilitate the connection of the rear cover 5 on the mounting groove 26 and improve the convenience of installation.

[0039] As shown in Figure 1 , 3 , the rear cover 5 and the stator support 2 are connected with a fixing bolt 52 away from the clamping buckle 51 side. The rear cover 5 and the stator support 2 are provided with a fixing bolt 52, which can ensure the connection stability between the rear cover 5 and the stator, and the pre-connection between the clamping buckle 51 and the clamping opening 28 can ensure the connection stability during the connection of the fixing bolt 52.

[0040] As shown in Figure 1 , 4 , the rotor support 3 includes a connecting plate 31 provided at the bottom of the main shell 1, and the connecting plate 31 is connected with a lower mounting groove 32, and the lower mounting groove 32 is connected with a lower bearing 33, and the lower bearing 33 is connected with the rotor assembly 4. The rotor support 3 includes a connecting plate 31 provided at the bottom of the main shell 1, and the connecting plate 31 is provided at the center of the main shell 1, so that the lower bearing 33 mounted on the lower mounting groove 32 can be connected with the main shaft 41 in the rotor support 3, and the rotor assembly 4 is connected with the upper bearing 25 and the lower bearing 33, so as to ensure the flexible rotation and uniformity of the rotor assembly 4.

[0041] Example 2:

[0042] As shown in Figure 1As shown, a compact lawn mower motor, comprising a main housing 1, a stator support 2 is connected above the main housing 1, the stator support 2 is fixedly connected with a stator assembly 21, the main housing 1 is provided with a mounting opening 11 on one side close to the stator support 2, the main housing 1 is provided with a rotor support 3 on one side away from the stator support 2, the rotor support 3 is rotatably connected with a rotor assembly 4, the stator support 2 is provided with a downwardly extending mounting shaft 22 on one side close to the mounting opening 11, the mounting shaft 22 is provided with a rotor through hole 23, and the rotor assembly 4 semi-encloses the stator assembly 21.

[0043] Therefore, on the basis of the above-mentioned defects, the shell of the motor is divided into the main housing 1 and the stator support 2 and the rotor support 3, the stator support 2 is arranged above the main housing 1, the rotor support 3 is arranged below the main housing 1, the main housing 1 is provided with the mounting opening 11 on one side close to the stator support 2, and the stator support 2 is connected with the stator assembly 21 and the rotor support 3 is connected with the rotor assembly 4, so that the installation of the stator assembly 21 and the rotor assembly 4 is separated, and since the stator assembly 21 is semi-enclosed by the rotor assembly 4, the torque of the rotor is increased, the working scene of the lawn mower can be better adapted, the weeding efficiency is improved, and better starting performance can be obtained.

[0044] As shown in the Figure 2 , the stator support 2 is provided with an upper mounting groove 24 on one side away from the mounting opening 11, the upper mounting groove 24 is provided with an upper bearing 25, and the upper mounting groove 24 is communicated with the rotor through hole 23. The upper mounting groove 24 provided on one side away from the mounting opening 11 of the stator support 2 can connect the upper bearing 25, and since the rotor through hole 23 is provided on the stator support 2, the rotor assembly 4 can pass through the rotor through hole 23 so that part of the main shaft 41 is located in the upper mounting groove 24 and connected with the upper bearing 25, so that the rotor assembly 4 can rotate more flexibly.

[0045] As shown in the Figure 1 , 3 , the upper mounting groove 24 is provided with a mounting groove 26 on one side away from the mounting opening 11, and the inner wall of the mounting groove 26 is clamped and connected with a clamping spring 27. By providing the mounting groove 26, space can be provided above the upper mounting groove 24 for installing the clamping spring 27, so as to ensure the fixing and restraining effect of the upper bearing 25.

[0046] As shown in the Figure 3 , the upper mounting groove 24 is provided with a mounting groove 26 on one side away from the mounting opening 11, the outer wall of the mounting groove 26 is provided with a clamping opening 28, the mounting groove 26 is clamped and connected with a rear cover 5, the rear cover 5 is provided with a clamping buckle 51 corresponding to the clamping opening 28, and the clamping buckle 51 is clamped and connected with the clamping opening 28. The mounting groove 26 is provided with the clamping opening 28, which can be clamped and connected with the clamping buckle 51 on the rear cover 5, so as to facilitate the connection of the rear cover 5 on the mounting groove 26 and improve the convenience of installation.

[0047] As shown in Figure 1 , 3 , the rear cover 5 and the stator support 2 are connected with the fixing bolt 52 on the side away from the clamping buckle 51. The fixing bolt 52 is arranged on the rear cover 5 and the stator support 2, which can ensure the stability of the connection between the rear cover 5 and the stator, and the pre-connection between the clamping buckle 51 and the clamping opening 28 can ensure the connection stability during the connection of the fixing bolt 52.

[0048] As shown in Figure 1 , 4 , the rotor support 3 includes a connecting plate 31 arranged at the bottom of the main shell 1, the connecting plate 31 is connected with a lower mounting groove 32, the lower mounting groove 32 is connected with a lower bearing 33, and the lower bearing 33 is connected with the rotor assembly 4. The rotor support 3 includes a connecting plate 31 arranged at the bottom of the main shell 1, and the lower mounting groove 32 is arranged at the center of the main shell 1 through the connecting plate 31, so that the lower bearing 33 mounted on the lower mounting groove 32 can be connected with the main shaft 41 in the rotor support 3, and the rotor assembly 4 is connected with the upper bearing 25 and the lower bearing 33, so as to ensure the flexible rotation and uniformity of the rotor assembly 4.

[0049] As shown in Figure 4 , the rotor assembly 4 includes a main shaft 41, the main shaft 41 is provided with a limiting plate 42 abutting against the upper part of the lower bearing 33, and the main shaft 41 is connected with a fan pressing plate 43 abutting against the lower part of the lower bearing 33. The limiting plate 42 and the fan pressing plate 43 are arranged on the main shaft 41, and the limiting plate 42 and the fan pressing plate 43 clamp the lower bearing 33 in the middle position, so as to ensure the stability of the lower bearing 33.

[0050] As shown in Figure 2 , the rotor assembly 4 includes a main shaft 41, the main shaft 41 is connected with a magnetic sheet mounting plate 44 on the side away from the mounting opening 11, the magnetic sheet mounting plate 44 is semi-wrapped with the stator assembly 21, and the magnetic sheet mounting plate 44 is provided with a magnetic sheet. The main shaft 41 on the rotor assembly 4 is connected with the magnetic sheet mounting plate 44, and the magnetic sheet is arranged on the magnetic sheet mounting plate 44. Through the magnetic attraction effect between the magnetic sheet and the stator assembly 21, the magnetic sheet mounting plate 44 can be driven to rotate, so as to drive the main shaft 41 to rotate, and the magnetic sheet mounting plate 44 is semi-wrapped with the stator assembly 21, so as to form a structure that the stator assembly 21 is located inside the magnetic sheet mounting plate 44, and thus the magnetic sheet mounting plate 44 can form a larger torque, so as to drive the main shaft 41 to rotate and drive the blade to mow.

[0051] As shown in Figure 2 , 4As shown in Figure 5, a connecting sleeve 45 is provided on the main shaft 41. An extension plate 46 is connected between the connecting sleeve 45 and the magnetic plate mounting plate 44. The extension plate 46 has several upper openings 461. The rotor support 3 includes a connecting plate 31 located below the extension plate 46. The connecting plate 31 has several lower openings 311, and air is allowed between the upper openings 461 and the lower openings 311. The connecting sleeve 45 and the main shaft 41 are connected by a spline. An extension plate 46 is provided between the connecting sleeve 45 and the magnetic plate mounting plate 44, and an upper opening 461 is provided on the extension plate 46. The connecting plate 31 is located below the extension plate 46, and a lower opening 311 is provided on the connecting plate 31. The lower opening 311 is connected to the upper opening 461, allowing air to circulate. This allows the heat generated by the rotor assembly 4 and the stator assembly 21 during operation to be dissipated by a fan.

[0052] like Figure 4 As shown, the rotor assembly 4 includes a main shaft 41. The end of the main shaft 41 furthest from the mounting opening 11 is threaded, and a nut 47 is connected to the thread. A blade clamping plate 48 is connected to the main shaft 41 on the side of the nut 47 closest to the mounting opening 11. The threaded connection ensures the stability of the nut 47, which fixes the blade clamping plate 48 to the main shaft 41, creating a mounting gap between the blade clamping plate 48 and the fan clamping plate 43 for mounting and securing the blade.

Claims

1. A compact lawnmower motor, characterized in that, The utility model provides a kind of motor, including main shell, the stator support is connected above the main shell, the stator support is fixedly connected with stator assembly, the main shell is close to stator support side and is provided with installation opening, the main shell is away from stator support side and is provided with rotor support, the rotor support is rotatably connected with rotor assembly, the stator support is close to installation opening side and is provided with downwardly extending installation shaft, the installation shaft is provided with rotor hole, and the rotor assembly half-encloses stator assembly.

2. A compact lawnmower motor as claimed in claim 1, characterized in that The stator support is provided with an upper mounting groove away from the installation opening, and the upper mounting groove is provided with an upper bearing.

3. A compact lawnmower motor as claimed in claim 2, characterized in that The upper mounting groove is provided with a convex edge away from the installation opening, and the convex edge is provided with a clamping spring on the inner wall.

4. A compact lawnmower motor as claimed in claim 2, characterized in that The upper mounting groove is provided with a convex edge away from the installation opening, and the convex edge is provided with a clamping opening on the outer wall.

5. A compact lawnmower motor as claimed in claim 4, characterized in that The rear cover is provided with a clamping buckle corresponding to the clamping opening.

6. A compact lawnmower motor according to any one of claims 1-5, characterized in that, The rear cover and the stator support are connected by a fixing bolt away from the clamping buckle.

7. A compact lawnmower motor as claimed in claim 6, characterized in that The rotor support includes a connecting plate provided at the bottom of the main shell, and the connecting plate is connected with a lower mounting groove.

8. A compact lawnmower motor according to any one of claims 1-5, characterized in that, The rotor assembly includes a main shaft, and the main shaft is provided with a limiting plate abutting against the upper part of the lower bearing.

9. A compact lawnmower motor as claimed in claim 8, characterized in that The rotor assembly includes a main shaft, and the main shaft is provided with a magnetic sheet mounting plate away from the installation opening.

10. A compact lawnmower motor according to any one of claims 1-5, characterized in that, The main shaft is provided with a connecting sleeve, and the connecting sleeve is connected with an extension plate between the magnetic sheet mounting plate. The rotor assembly includes a main shaft, and the main shaft is provided with a screw thread away from the installation opening. The main shaft is provided with a nut on the screw thread, and the main shaft is connected with a blade pressing plate on the side of the nut close to the installation opening.

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