TWM604543U - Electric lawn mower - Google Patents

Abstract

An electric lawn mower is provided with a DC brushless electric motor, a cutting device and an operating device; the DC brushless electric motor is connected with a connector, the DC brushless electric motor includes at least an upper cover and a lower cover, and the lower cover A rotating shaft is further fixedly arranged on the outer surface of the lower groove; between the upper cover and the lower cover of the DC brushless electric motor, there is further provided a positioning column passing through the upper groove of the upper cover and two positioning posts respectively arranged in The bearings of the upper slot and the lower slot, and the stator structure and the rotor structure are designed to allow the rotor structure to drive the shaft of the lower cover to pivot; the operating device is provided with a rod body, and the rod body is provided with The grip and the switch are electrically connected to the electric motor, To enhance the advantages of using safety.

Description

Electric lawn mower

This creation is about an electric lawn mower, in particular, it refers to an electric lawn mower that covers the rotor and rotates together with the upper cover and the rotating cover, thereby providing a safer electric lawn mower.

At present, lawn mowers can be roughly divided into gasoline (diesel) engine lawn mowers and electric lawn mowers. Since gasoline-engine lawn mowers are noisy during operation, and the exhaust gas emitted will cause air pollution, coupled with the inconvenience of maintenance, therefore, although its lawn mower function is better than electric lawn mowers, the general public would prefer Choose an electric lawn mower that is simple to maintain, easy to operate, and does not cause air pollution. In the future, as the functions of electric lawn mowers are gradually strengthened and the public's awareness of environmental protection gradually rises, electric gardening tools will have a place.

Conventional electric lawn mowers, such as the Taiwan Announcement No. M450969 Patent, disclose a direct-drive electric lawn mower, which is provided with a driving device, a cutting device and an operating device, and the driving device has an out-rotating electric The motor, the outer rotation type electric motor is connected with a connector, the outer rotation type electric motor is provided with a stator, a base is connected above the stator, and a rotor is sleeved on the outer side of the stator, and a lower cover is connected under the rotor, and the base is provided with Rotating shaft, the end of the rotating shaft extends out of the lower cover, the operating device is connected to the top of the connecting piece of the driving device, and has an electrical connector and switch for electrically connecting to the outward-rotating electric motor, and the cutting device is connected below the rotating shaft At the end and the lower cover, when the operating device is connected to the power supply and drives the outer rotary electric motor, the rotor of the outer rotary electric motor drives the lower cover and the rotating shaft to pivot, and the rotating shaft and the lower cover drive the cutting device to rotate.

However, because the base is provided with a rotating shaft, the base and the lower cover will rotate relatively. The motor fixes the stator and the base directly above or below the carrier, and the rotor, stator and other components are directly exposed to the outside, so that it is easy to damage, reduce the service life, and affect the safety of operation and use.

The purpose of this creation is to provide an electric lawn mower that uses a DC brushless electric motor, and its upper cover and lower cover will cover the stator structure and the rotor structure, so that it can drive the lower cover to rotate together, thereby improving the safety of use Electric lawn mower.

The second purpose of this creation is to provide an electric lawn mower, whereby a stator structure and a rotor structure are arranged between the upper cover and the lower cover, and the two are arranged opposite each other, so that each stator structure and each rotor structure can be used The attraction of the magnetic field force and the change of the magnetic field can achieve relative rotation output action, making it difficult to generate high-temperature arc and metal shavings during phase commutation, and has less electrical noise, high reliability, long life and easy high speed.

Another purpose of this creation is to provide an electric lawn mower that is designed to cover the outer cover of the DC brushless electric motor to effectively protect the normal operation of the motor and improve the safety of operation and use.

An electric lawn mower that can achieve the above creative purpose. The electric lawn mower includes at least a DC brushless electric motor connected to a connecting piece; wherein the DC brushless electric motor includes at least an upper cover, and one end of the upper cover is provided with an upper cover opening, And the other end is recessed with an upper notch; and a lower cover, one of the lower cover openings of the lower cover is relatively set at the upper cover opening of the upper cover, wherein the lower cover is opposite to the other end of the upper cover provided with a lower cover The outer surface of the lower groove of the lower cover is further fixedly provided with a rotating shaft; wherein, between the upper cover and the lower cover of the DC brushless electric motor, there is provided an upper cover passing through the upper cover The slotted positioning column and two bearings respectively arranged in the upper slot and the lower slot, and the positioning column is provided with a fixed sub-structure with a plurality of positioning hole fixing rings; and the inner ring wall of the lower cover is stronger A rotor structure is provided, and the rotor structure is relatively sleeved outside the stator structure for the rotor structure to drive the shaft of the lower cover to pivot; an operating device is provided with a rod body, one end of the rod body is connected to the DC The other end of the connecting piece of the brushless electric motor is provided with an electrical connector for connecting to the power supply, and the rod body is provided with a handle and a switch, and the electrical connector and the switch are electrically connected In the DC brushless electric motor; and a cutting device, the cutting device is installed on the other end of the DC brushless electric motor relative to the connecting piece for mowing.

In a preferred embodiment of this invention, the periphery of the lower groove of the lower cover is smaller than the periphery of the lower cover opening of the lower cover; accordingly, through the design of the lower cover, the bearing and the lower groove, The lower cover rotates stably and provides the advantage of the power required by the cutting device.

In a preferred embodiment of the present invention, the rotating shaft is further provided with a locking member, and the locking member is fastened to the rotating shaft.

In a preferred embodiment of the present invention, the connecting member is provided with an outer cover, and the outer cover is fixed to the upper cover surface of the DC brushless electric motor with a fixing element, so that it is locked to the rod body through the fixing element on.

In a preferred embodiment of the present invention, a plug rod is connected to one side of the outer cover, and the end of the plug rod is plugged into the rod body of the operating device, and the plug rod is locked by the fixing element. It can be locked to the rod body.

In a preferred embodiment of the present invention, the cutting device is provided with a rope-rotating cutter, and the rope-rotating cutter is connected to the rotating shaft and the surface of the lower cover.

In a preferred embodiment of the present invention, the rotating shaft is further provided with a locking member, and the locking member is fastened to the rotating shaft, so that the rotating shaft passes through the cord cutter and is fixed to the locking member.

In a preferred embodiment of the invention, the cutting device is provided with a blade cutter, and the blade cutter is connected to the rotating shaft and the surface of the lower cover.

In a preferred embodiment of the present invention, the rotating shaft is further provided with a locking member, and the locking member is fixed to the rotating shaft so that the rotating shaft is provided with a gasket, a metal ring, and the blade cutter in sequence And a fixing piece for fixing the blade cutter to the rotating shaft of the DC brushless electric motor through the locking member.

In a preferred embodiment of the present invention, the stator structure and the rotor structure rotate relatively, and the rotor structure can drive the lower cover to rotate relatively, so that the cutting device and the lower cover rotate together.

Please refer to Figures 1 to 5 at the same time. In the first embodiment of the electric lawn mower provided by this creation, the electric lawn mower 100 is provided with a DC brushless electric motor 11, a cutting device 50 and an operating device 40. Wherein: the DC brushless electric motor 11 is connected with a connecting piece 12, and the DC brushless electric motor 11 includes at least an upper cover 16, the upper cover 16 is provided with an upper cover opening 161 at one end, and the other end is recessed with an upper slot 162; and the lower cover 17, a lower cover opening 171 of the lower cover 17 is set opposite to the upper cover opening 161 of the upper cover 16, wherein the lower cover 17 is opposite to the other end of the upper cover 16 and has a lower groove 172, and the outer surface of the lower slot 172 of the lower cover 17 is further fixedly provided with a rotating shaft 29; wherein, between the upper cover 16 and the lower cover 17 of the DC brushless electric motor 11 is further provided with a through hole The positioning post 20 of the upper notch 162 of the upper cover 16 and the two bearings 28 respectively arranged in the upper notch 162 and the lower notch 172, and the positioning column 20 has a plurality of positioning holes 21 fixed rings provided with stators Structure 13; and the inner ring wall of the lower cover 17 is further fixedly provided with a rotor structure 14, the rotor structure 14 is relatively sleeved outside the stator structure 13 for the rotor structure 14 to drive the shaft 29 of the lower cover 17 Pivoting; the operating device 40 is provided with a rod 41, one end of the rod 41 is connected to the connecting piece 12 of the driving device 10, and the other end is provided with an electrical connector 42 for connecting the power supply, and the rod 41 is provided with The grip 43 and the switch 44, and the electrical connector 42 and the switch 44 are electrically connected to the DC brushless electric motor 11.

Accordingly, the electric lawn mower 100 provided by the present creation uses the configuration design of the stator structure 13 and the rotor structure 14 so that the upper cover 16 and the lower cover 17 cover the stator structure 13 and the rotor structure 14 so that the stator structure 14 and the rotor The structure 14 rotates relatively and drives the lower cover 17 to rotate together, so that each of the stator structure 13 and each of the rotor structure 14 can achieve relative rotation output by the attraction of the magnetic field force and the change of the magnetic field. The design of no components extended on the upper cover makes it difficult to generate high-temperature arcs and metal shavings during commutation, and has less electrical noise, high reliability, long life and easy high speed, thereby providing higher safety in use Electric lawn mower.

In a preferred embodiment of the present invention, the periphery of the lower groove 172 of the lower cover 17 is smaller than the periphery of the lower cover opening 171 of the lower cover 17; accordingly, through the lower cover and the bearing and the lower groove The design enables the lower cover to rotate stably and provides the advantage of the power required by the cutting device.

According to this, through the magnetic field changes of the rotor structure 14 and the stator structure 13, the rotor structure 14 is rotated relative to the stator structure 13, and the lower cover 17 is driven to rotate, and the power connected to the cutting device 50 is also driven in conjunction with the cutting device 50. Mowing action.

In a preferred embodiment of the present invention, the rotating shaft 29 is further provided with a locking member 31, and the locking member 31 is fastened to the rotating shaft 29.

In a preferred embodiment of the present invention, the connecting member 12 is provided with an outer cover 35, and the outer cover 35 is locked on the surface of the upper cover 16 of the DC brushless electric motor 11 by a fixing element 36. In a preferred embodiment of the present invention, a plug rod 37 is connected to one side of the outer cover 35, and the end of the plug rod 37 is plugged into the rod body 41 of the operating device 40, and is locked by the fixing element 36 In the rod body 41.

Please refer to Fig. 3, in a preferred embodiment of the present creation, the cutting device 50 is provided with a rope rotary cutter 51, and the rope rotary cutter 51 is fixedly connected to the surface of the shaft 29 and the lower cover 17 According to this, the rope rotary cutter 51 is generally made of nylon material, and cut by high-speed centrifugal force to achieve the effect of cutting grass. In an embodiment of the present invention, the rotating shaft 29 is further provided with a locking member 31 which is fastened to the rotating shaft 29 so that the rotating shaft 29 passes through the rope rotary cutter 51 and is fixed to the lock Firmware 31.

In a preferred embodiment of the present invention, the stator structure 13 and the rotor structure 14 rotate relatively, and the rotor structure 14 can drive the lower cover 17 to rotate relatively, so that the cutting device 50 and the lower cover 17 are together Rotate.

Please refer to Figures 6 and 7, the second embodiment of the electric lawn mower provided by this creation. The electric lawn mower 100 is provided with a DC brushless electric motor 11, a cutting device 50 and an operating device 40, but this The embodiment is different from the embodiment in FIG. 1 in that the cutting device 50 is provided with a blade cutter 52 which is connected to the rotating shaft 29 and the surface of the lower cover 17. In a preferred embodiment of the present invention, the rotating shaft 29 is further provided with a locking member 31, and the locking member 31 is fastened to the rotating shaft 29 so that the rotating shaft 29 is provided with a gasket 521 and a metal ring 522 in sequence. , The blade cutter 52 and a fixing piece 523, so that the blade cutter 52 is fixed to the shaft 29 of the DC brushless electric motor 11 through the locking member 31; accordingly, the weeding operation can be performed quickly and stably , And can cut hard or tough plants. Compared with the rope rotary cutter, it can reduce the number of cutting and save effort.

The electric lawn mower provided by this creation has the following advantages when compared with the above cited cases: (1) The upper cover and the lower cover will cover the stator structure and the rotor structure, and drive the lower cover to rotate together, thereby providing an electric lawn mower with higher safety; (2) The stator structure and the rotor structure are arranged between the upper cover and the lower cover, and the two are arranged opposite each other, so that each of the stator structure and each of the rotor structure can utilize the attraction of the magnetic field force and the change of the magnetic field to achieve relative rotation The output action makes it difficult to produce high-temperature arcs and metal shavings during phase commutation, and has less electrical noise, high reliability, long life, and high speed; and (3) The design of covering the outer cover of the DC brushless electric motor can effectively protect the normal operation of the motor and improve the safety of operation and use.

The above detailed description is a specific description of a feasible embodiment of this creation, but this embodiment is not used to limit the scope of the patent of this new model. Any equivalent implementation or modification that does not deviate from the spirit of the creation technique should be included in In the scope of the patent in this case.

100: Electric lawn mower 11: DC brushless electric motor 12: Connector 13: Stator structure 14: Rotor structure 16: upper cover 161: Cover opening 162: upper gap 17: Lower cover 171: Lower cover opening 172: The lower slot 20: positioning column 21: positioning hole 28: Bearing 29: shaft 31: lock firmware 35: outer cover 36: fixed element 37: plug rod 40: operating device 41: Rod body 42: electrical connector 43: Grip 44: switch 50: Cutting device 51: Rope cutter 52: Blade cutter 521: Gasket 522: Metal ring 523: fixed piece

Figure 1 is a perspective view of the first preferred embodiment of the creation; Figure 2 is an exploded view of a partial three-dimensional appearance of the first preferred embodiment of the creation; Figure 3 is a three-dimensional partial exploded view of the first preferred embodiment of the creation of the brushless DC electric motor; Figure 4 is a three-dimensional exploded view of the first preferred embodiment of the creation of the brushless DC electric motor; Figure 5 is a cross-sectional view of the first preferred embodiment of the creation of the brushless DC electric motor; Figure 6 is a perspective view of the second preferred embodiment of the creation; and Figure 7 is a three-dimensional partial exploded view of the second preferred embodiment of the creation.

100: Electric lawn mower

11: DC brushless electric motor

12: Connector

35: outer cover

37: plug rod

40: operating device

41: Rod body

42: electrical connector

43: Grip

44: switch

50: Cutting device

51: Rope cutter

Claims (10)

An electric lawn mower includes at least: A DC brushless electric motor (11), the DC brushless electric motor (11) is connected to a connector (12); wherein the DC brushless electric motor (11) at least includes an upper cover (16), the upper cover (16) ) One end is provided with an upper cover opening (161), and the other end is recessed with an upper notch (162); and a lower cover (17), one of the lower cover (17) has a lower cover opening (171) set in the The upper cover opening (161) of the upper cover (16), wherein the lower cover (17) is provided with a lower notch (172) opposite to the other end of the upper cover (16), and the lower cover (17) A rotating shaft (29) is further fixedly arranged on the outer surface of the slot (172); among them, the brushless DC electric motor (11) is further provided with a through-hole between the upper cover (16) and the lower cover (17) The positioning column (20) of the upper slot (162) of the upper cover (16) and two bearings (28) respectively arranged in the upper slot (162) and the lower slot (172), and the positioning column ( 20) The fixed ring with a plurality of positioning holes (21) is provided with a stator structure (13); and the inner ring wall of the lower cover (17) is further fixedly provided with a rotor structure (14), the rotor structure (14) is Relatively sleeve the stator structure (13), so that the rotor structure (14) drives the shaft (29) of the lower cover (17) to pivot; An operating device (40) is provided with a rod body (41), one end of the rod body (41) is connected to the connecting piece (12) of the DC brushless electric motor (11), and the other end is provided for connecting the power supply Is an electrical connector (42), and the lever body (41) is provided with a grip (43) and a switch (44), and the electrical connector (42) and the switch (44) are electrically Connected to the DC brushless electric motor (11); and A cutting device (50) is installed on the other end of the DC brushless electric motor (11) opposite to the connecting piece (12). The electric lawn mower according to claim 1, wherein the periphery of the lower slot (172) of the lower cover (17) is smaller than the periphery of the lower cover opening (171) of the lower cover (17). The electric lawn mower according to claim 1, wherein the rotating shaft (29) is further provided with a locking member (31), and the locking member (31) is fastened to the rotating shaft (29). The electric lawn mower according to claim 1, wherein the connecting member (12) is provided with an outer cover (35), and the outer cover (35) is fixed to the DC brushless electric motor ( 11) The surface of the upper cover (16). The electric lawn mower according to claim 4, wherein a plug rod (37) is connected to one side of the outer cover (35), and the end of the plug rod (37) is plugged into the rod of the operating device (40) Inside the body (41) and locked to the rod body (41) by the fixing element (36). The electric lawn mower according to claim 1, wherein the cutting device (50) is provided with a rope rotary cutter (51), and the rope rotary cutter (51) is connected to the rotating shaft (29) and the The surface of the lower cover (17). The electric lawn mower according to claim 6, wherein the shaft (29) is further provided with a locking member (31), and the locking member (31) is fastened to the shaft (29) so that the shaft (29) The rope rotary cutter (51) is threaded and fixed to the locking member (31). The electric lawn mower according to claim 1, wherein the cutting device (50) is provided with a blade cutter (52), and the blade cutter (52) is connected to the shaft (29) and the lower cover (17) Surface. The electric lawn mower according to claim 8, wherein the rotating shaft (29) is further provided with a locking member (31), and the locking member (31) is fastened to the rotating shaft (29) so that the rotating shaft (29) A gasket (521), a metal ring (522), the blade cutter (52), and a fixing piece (523) are pierced in sequence, so that the blade cutter (52) passes through the locking member (31) The rotating shaft (29) is fixed on the DC brushless electric motor (11). The electric lawn mower according to claim 1, wherein the stator structure (13) and the rotor structure (14) rotate relatively, and the rotor structure (14) can drive the lower cover (17) to relatively rotate, The cutting device (50) and the lower cover (17) are rotated together.

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