A mower motor and a mower robot

Abstract

The utility model discloses a mower motor, including mutually buckled casing and end cover, be provided with the main shaft, inner stator and outer rotor in casing, the inside fixed connection of end cover has the shaft cover of axial extension, the rear end of outer rotor is sleeved in the outer periphery of inner stator, and the end cover includes the coaxial arrangement of outer ring and inner ring, is provided with the heat dissipation board of circumferential arrangement between outer ring and inner ring, is provided with the heat dissipation window of the intercommunication casing inside cavity between adjacent heat dissipation board, and the outer ring inserts casing rear end opening, and the inner hole of inner ring is the second through -hole. Through the cooperation of inner stator and outer rotor, increase motor torque, reduce motor volume, at the same time, the end cover of embedded type is directly connected inner stator, and is provided with heat dissipation board, increases the heat dissipation effect, avoids long -time use temperature to be too high, prolongs the life, and improves equipment security and reliability. The utility model discloses still a kind of mower robot including above-mentioned mower motor.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment, and in particular to a lawnmower motor. Furthermore, this utility model also relates to a lawnmower robot including the aforementioned lawnmower motor. Background Technology

[0002] In lawn mowing equipment, an electric motor is required as the power source. In existing technology, the blade motors of lawn mowing robots generally adopt an internal rotor structure, which is relatively large and not suitable for the mowing joints used in micro-robots. At the same time, the motor's heat dissipation is poor, and the motor temperature rises after prolonged use, affecting normal operation and reducing the safety and reliability of the equipment.

[0003] Therefore, how to provide a lawnmower motor with a small size and good heat dissipation is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a lawnmower motor that increases motor torque, reduces motor size, and improves heat dissipation through the cooperation of an inner stator and an outer rotor. Another purpose of this invention is to provide a lawnmower robot incorporating the aforementioned lawnmower motor.

[0005] To solve the above-mentioned technical problems, this utility model provides a lawnmower motor, including a housing and an end cover that are interlocked. The housing contains a main shaft, an inner stator, and an outer rotor. The front end of the main shaft passes through a first through hole at the center of the front end face of the housing and is connected by a first bearing. The rear end of the main shaft is connected by a second bearing to a second through hole at the center of the end cover. An axially extending bushing is fixedly connected to the inner side of the end cover. The main shaft passes through the inner hole of the bushing. The inner stator is fixedly fitted onto the outer circumference of the bushing. The front end of the outer rotor is fixedly fitted onto the outer circumference of the main shaft, and the rear end of the outer rotor is fitted onto the outer circumference of the inner stator. The end cover includes an outer ring and an inner ring arranged coaxially. A circumferentially arranged heat dissipation plate is provided between the outer ring and the inner ring. A heat dissipation window communicating with the internal cavity of the housing is provided between adjacent heat dissipation plates. The outer ring is inserted into the rear end opening of the housing, and the inner hole of the inner ring is the second through hole.

[0006] Preferably, the outer wall of the housing is provided with heat dissipation holes and heat dissipation fins.

[0007] Preferably, a first mounting hole is provided on the outer side of the front end face of the housing, and a second mounting hole is provided on the outer side of the end cover.

[0008] Preferably, the first through hole is a stepped hole, the first bearing is installed at the inner end of the first through hole, the first dust cover is installed at the outer end of the first through hole, and the second bearing, the wave washer, the retaining spring and the second dust cover are installed in sequence from the inside to the outside of the second through hole.

[0009] Preferably, the outer ring is provided with a radially extending threaded hole, and the rear end of the housing is provided with a positioning hole at a corresponding position. The bolt passes through the positioning hole and connects to the threaded hole. The end cover is provided with a wire guide tube, and the cable connecting the inner stator passes through the wire guide tube.

[0010] Preferably, the end cap and the bushing are integrally formed, and the second through hole is integrally connected to the inner hole of the bushing.

[0011] Preferably, the outer rotor includes a front sleeve and a rear sleeve arranged coaxially. The inner diameter of the front sleeve matches the diameter of the main shaft and the two are fixedly connected. The inner diameter of the rear sleeve matches the diameter of the inner stator and an annular gap is provided between the two. A magnet is installed on the rear sleeve.

[0012] Preferably, the bushing has a plurality of axially extending grooves on its outer periphery, the depth of which gradually increases from back to front.

[0013] Preferably, the outer rotor is provided with blades on its outer periphery, the front end face of the housing is provided with an air inlet, and a heat dissipation window communicating with the internal cavity of the housing is provided between adjacent heat dissipation plates.

[0014] This utility model also provides a lawnmower robot, including a lawnmower motor as described in any of the above.

[0015] This utility model provides a lawnmower motor, including a housing and an end cover that are interlocked. The housing contains a main shaft, an inner stator, and an outer rotor. The front end of the main shaft passes through a first through hole at the center of the front end face of the housing and is connected by a first bearing. The rear end of the main shaft is connected to a second through hole at the center of the end cover via a second bearing. An axially extending bushing is fixedly connected to the inner side of the end cover. The main shaft passes through the inner hole of the bushing. The inner stator is fixedly fitted onto the outer circumference of the bushing. The front end of the outer rotor is fixedly fitted onto the outer circumference of the main shaft, and the rear end of the outer rotor is fitted onto the outer circumference of the inner stator. The end cover includes an outer ring and an inner ring arranged coaxially. A circumferentially arranged heat dissipation plate is provided between the outer ring and the inner ring. A heat dissipation window communicating with the internal cavity of the housing is provided between adjacent heat dissipation plates. The outer ring is inserted into the rear end opening of the housing, and the inner hole of the inner ring is a second through hole.

[0016] The outer rotor is fitted around the outer periphery of the inner stator and is connected to the main shaft, thereby driving the main shaft to rotate. Compared with the driving method of the inner rotor in the prior art, this application increases the motor torque and reduces the motor size by cooperating with the inner stator and the outer rotor. At the same time, the embedded end cover is directly connected to the inner stator and is equipped with a heat sink to increase the heat dissipation effect, avoid excessive temperature during long-term use, extend the service life, and improve the safety and reliability of the equipment.

[0017] This utility model also provides a lawn mowing robot including the above-mentioned lawnmower motor. Since the above-mentioned lawnmower motor has the above-mentioned technical effects, the above-mentioned lawn mowing robot should also have the same technical effects, which will not be described in detail here. Attached Figure Description

[0018] Figure 1 A schematic diagram of a specific embodiment of the lawnmower motor provided by this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of a specific embodiment of the lawnmower motor provided by this utility model;

[0020] Figure 3 An exploded view of one specific embodiment of the lawnmower motor provided by this utility model;

[0021] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0022] Among them, 1-machine housing; 1-1-first mounting hole; 2-end cover; 2-1-outer ring; 2-2-inner ring; 2-3-heat sink; 2-4-threaded hole; 2-5-second mounting hole; 2-6-wire guide; 3-spindle; 4-inner stator; 5-outer rotor; 5-1-magnet; 6-first bearing; 7-second bearing; 8-shaft sleeve; 8-1-groove; 9-first dust cover; 10-wave pad; 11-circlip; 12-second dust cover; 13-cable. Detailed Implementation

[0023] The core of this invention is to provide a lawnmower motor that increases motor torque, reduces motor size, and improves heat dissipation through the cooperation of an inner stator and an outer rotor. Another core aspect of this invention is to provide a lawnmower robot incorporating the aforementioned lawnmower motor.

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of a specific embodiment of the lawnmower motor provided by this utility model; Figure 2 This is a cross-sectional schematic diagram of a specific embodiment of the lawnmower motor provided by this utility model; Figure 3 An exploded view of one specific embodiment of the lawnmower motor provided by this utility model; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0026] This utility model provides a lawnmower motor, including a housing 1 and an end cap 2 that are interlocked. The axial direction of each component is defined as the front end and the opposite end as the rear end; the specific position of each component during installation is not limited. The housing 1 is a cylindrical structure, with a closed front end and an open rear end. The end cap 2 is a plate whose shape matches the opening at the rear end of the cylindrical structure, and it is fastened to the opening. The housing 1 contains a main shaft 3, an inner stator 4, and an outer rotor 5. A first through hole is provided at the center of the front end face of the housing 1. The front end of the main shaft 3 passes through the first through hole and is connected by a first bearing 6. The front end of the main shaft 3 protrudes from the front end face of the housing 1 to form an output end. A second through hole is provided at the center of the end cap 2. The rear end of the main shaft 3 is connected to the second through hole by a second bearing 7. The first bearing 6 and the second bearing 7 support the main shaft 3, allowing it to rotate relative to the housing 1. Furthermore, an axially extending bushing 8 is fixedly connected to the inner side of the end cover 2. The bushing 8 extends into the housing 1 and has an axially extending inner hole. The inner hole and the second through hole are integrally connected. The main shaft 3 passes through the inner hole of the bushing 8, and the outer circumference of the main shaft 3 is clearance-fitted with the bushing 8, allowing the main shaft 3 to rotate relative to the bushing 8. The inner stator 4 is fixedly fitted onto the outer circumference of the bushing 8, i.e., the position of the inner stator 4 is fixed. The front end of the outer rotor 5 is fixedly fitted onto the outer circumference of the main shaft 3, and the outer rotor 5 is relatively fixed to the main shaft 3. The rear end of the outer rotor 5 is fitted onto the outer circumference of the inner stator 4, with a gap between them. The inner stator 4 is a winding support structure with windings on it, and the outer rotor 5 is equipped with a magnet 5-1. During operation, the power supply is the winding, which interacts with the magnet 5-1, driving the outer rotor 5 to rotate around the axis, thereby driving the main shaft 3 to rotate around the axis.

[0027] The end cover 2 includes an outer ring 2-1 and an inner ring 2-2 arranged coaxially. A circumferentially arranged heat dissipation plate 2-3 is disposed between the outer ring 2-1 and the inner ring 2-2. Multiple heat dissipation plates 2-3 are radially arranged within the annular groove between the outer ring 2-1 and the inner ring 2-2. During installation, the outer ring 2-1 is inserted into the rear opening of the housing 1, and the inner hole of the inner ring 2-2 is a second through hole. Alternatively, the outer ring 2-1 and the inner ring 2-2 can be left unconnected, directly connected by the heat dissipation plate 2-3 to improve heat dissipation. Alternatively, an end cover plate can be disposed between the outer ring 2-1 and the inner ring 2-2, with the heat dissipation plate 2-3 simultaneously connected to the end cover plate. Heat from the end cover plate is transferred to the heat dissipation plate 2-3, and then to the outside environment through the heat dissipation plate 2-3.

[0028] The outer rotor 5 is fitted around the outer periphery of the inner stator 4. The outer rotor 5 is connected to the main shaft 3 and drives the main shaft 3 to rotate. Compared with the driving method of the inner rotor in the prior art, this application increases the motor torque and reduces the motor size by cooperating with the inner stator 4 and the outer rotor 5. At the same time, the embedded end cover 2 is directly connected to the inner stator 4 and is equipped with heat sinks 2-3 to increase the heat dissipation effect, avoid excessive temperature during long-term use, extend the service life, and improve the safety and reliability of the equipment.

[0029] To further improve heat dissipation, heat dissipation holes and heat dissipation fins can be provided on the outer wall of the casing 1.

[0030] To facilitate the connection between the motor and the equipment, a first mounting hole 1-1 is provided on the outer side of the front end face of the housing 1, and a second mounting hole 2-5 is provided on the outer side of the end cover 2. Corresponding mounting holes are provided on the frame, with the first mounting hole 1-1 and / or the second mounting hole 2-5 corresponding to the mounting holes, and then connected by bolts. Specifically, two symmetrically arranged first mounting holes 1-1 and two second mounting holes 2-5 can be provided, or the number and layout of the mounting holes can be adjusted according to the situation, all within the protection scope of this utility model.

[0031] In the lawnmower motor provided in the specific embodiment of this utility model, the first through hole is a stepped hole, the first bearing 6 is installed at the inner end of the first through hole, the first dust cover 9 is installed at the outer end of the first through hole, and the second bearing 7, the wave pad 10, the snap ring 11 and the second dust cover 12 are installed in the second through hole from the inside to the outside.

[0032] To facilitate the installation of end cap 2, the outer ring 2-1 is provided with radially extending threaded holes 2-4. Simultaneously, a positioning hole is provided at the corresponding position at the rear end of the housing 1. During installation, the outer ring 2-1 is inserted into the rear end opening of the housing 1, and the threaded holes 2-4 are aligned with the positioning holes. Bolts pass through the positioning holes and connect to the threaded holes 2-4. Specifically, four threaded holes 2-4 are evenly arranged along the circumference. At the same time, four axially extending reinforcing ribs are provided on the outer wall of the housing 1 at the positions corresponding to the four positioning holes. For cable connection, the end cap 2 is provided with a cable guide 2-6. The cable 13 connecting to the inner stator 4 passes through the cable guide 2-6. The gap between the inner wall of the cable guide 2-6 and the cable 13 is filled with thermally conductive silicone to fix the position of the cable 13 and improve heat dissipation.

[0033] Preferably, the end cap 2 and the bushing 8 are integrally formed, the second through hole is integrally connected with the inner hole of the bushing 8, and a slope is provided at the connection between the end cap 2 and the bushing 8 to increase strength. At the same time, after the inner rotor 4 is fitted into the bushing 8, it abuts against the slope to achieve axial positioning.

[0034] In the lawnmower motor provided in this specific embodiment of the utility model, the outer rotor 5 includes a front sleeve and a rear sleeve arranged coaxially. The front sleeve and the rear sleeve are fixedly connected. The inner diameter of the front sleeve matches the diameter of the main shaft 3 and the two are fixedly connected. The inner diameter of the rear sleeve matches the diameter of the inner stator 4 and an annular gap is provided between the two. A magnet 5-1 is installed on the rear sleeve. When energized, the rear sleeve rotates around the inner stator 4, which in turn drives the front sleeve to rotate, and finally drives the main shaft 3 to rotate.

[0035] Preferably, the outer periphery of the bushing 8 is provided with multiple axially extending grooves 8-1, the depth of which gradually increases from back to front. Correspondingly, the center of the inner stator 4 is provided with a circular hole that mates with the shaft hole on the outer wall of the bushing 8. The two are connected by a key, and the groove 8-1 is a keyway. During the assembly process, the key on the inner wall of the circular hole enters the groove 8-1. Since the front end of the groove 8-1 is deeper than the rear end, the key is easier to enter during installation and can be locked in place after it is fully inserted, thus improving the connection stability.

[0036] Based on the lawnmower motors provided in the above-described specific embodiments, blades are provided on the outer circumference of the outer rotor 5, an air inlet is provided on the front end face of the housing 1, and a heat dissipation window connecting the internal cavity of the housing 1 is provided between adjacent heat dissipation plates 2-3. During the rotation of the outer rotor 5, the blades rotate synchronously, forming an airflow from front to back. Air enters the interior of the housing 1 through the air inlet, dissipates heat from the internal structure, and then flows out through the heat dissipation window, improving the heat dissipation effect.

[0037] In addition to the aforementioned lawnmower motor, this utility model also provides a lawnmower robot that includes the aforementioned lawnmower motor. For the structure of other parts of the lawnmower robot, please refer to the prior art, which will not be repeated here.

[0038] The above provides a detailed description of the lawnmower motor and lawnmower robot provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A lawnmower motor, characterized in that, The assembly includes a housing (1) and an end cover (2) that interlock. The housing (1) contains a main shaft (3), an inner stator (4), and an outer rotor (5). The front end of the main shaft (3) passes through a first through hole at the center of the front end face of the housing (1) and is connected via a first bearing (6). The rear end of the main shaft (3) is connected via a second bearing (7) to a second through hole at the center of the end cover (2). An axially extending bushing (8) is fixedly connected to the inner side of the end cover (2). The main shaft (3) passes through the inner hole of the bushing (8). The inner stator... (4) The outer rotor (5) is fixedly fitted on the outer periphery of the bushing (8), the front end of the outer rotor (5) is fixedly fitted on the outer periphery of the main shaft (3), the rear end of the outer rotor (5) is fitted on the outer periphery of the inner stator (4), the end cover (2) includes an outer ring (2-1) and an inner ring (2-2) arranged coaxially, a heat sink (2-3) is arranged circumferentially between the outer ring (2-1) and the inner ring (2-2), the outer ring (2-1) is inserted into the rear end opening of the housing (1), and the inner hole of the inner ring (2-2) is the second through hole.

2. The lawnmower motor according to claim 1, characterized in that, The outer wall of the casing (1) is provided with heat dissipation holes and heat dissipation fins.

3. The lawnmower motor according to claim 2, characterized in that, The outer side of the front end face of the housing (1) is provided with a first mounting hole (1-1), and the outer side of the end cover (2) is provided with a second mounting hole (2-5).

4. The lawnmower motor according to claim 3, characterized in that, The first through hole is a stepped hole. The first bearing (6) is installed at the inner end of the first through hole, and the first dust cover (9) is installed at the outer end of the first through hole. The second bearing (7), the wave pad (10), the snap ring (11), and the second dust cover (12) are installed in the second through hole from the inside to the outside.

5. The lawnmower motor according to claim 1, characterized in that, The outer ring (2-1) is provided with a radially extending threaded hole (2-4), and the rear end of the housing (1) is provided with a positioning hole at the corresponding position. The bolt passes through the positioning hole and connects to the threaded hole (2-4). The end cover (2) is provided with a wire guide (2-6), and the cable (13) connecting the inner stator (4) passes through the wire guide (2-6).

6. The lawnmower motor according to claim 1, characterized in that, The end cap (2) and the bushing (8) are integrally formed, and the second through hole is integrally connected with the inner hole of the bushing (8).

7. The lawnmower motor according to claim 1, characterized in that, The outer rotor (5) includes a front sleeve and a rear sleeve arranged coaxially. The inner diameter of the front sleeve matches the diameter of the main shaft (3) and the two are fixedly connected. The inner diameter of the rear sleeve matches the diameter of the inner stator (4) and an annular gap is provided between the two. A magnet (5-1) is installed on the rear sleeve.

8. The lawnmower motor according to claim 1, characterized in that, The bushing (8) has a plurality of axially extending grooves (8-1) on its outer periphery, and the depth of the grooves (8-1) gradually increases from back to front.

9. The lawnmower motor according to any one of claims 1 to 8, characterized in that, The outer rotor (5) is provided with blades on its outer periphery, the front end face of the housing (1) is provided with an air inlet, and a heat dissipation window connecting the internal cavity of the housing (1) is provided between adjacent heat dissipation plates (2-3).

10. A lawnmower robot, characterized in that, Includes a lawnmower motor as described in any one of claims 1 to 9.

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