CN110352693B

CN110352693B - Portable electric brush cutter

Info

Publication number: CN110352693B
Application number: CN201910568252.7A
Authority: CN
Inventors: 沈焕军
Original assignee: Ningbo Aosheng Machine Co ltd
Current assignee: Ningbo Aosheng Machine Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2022-04-15
Anticipated expiration: 2039-06-27
Also published as: CN110352693A

Abstract

The invention relates to the technical field of agricultural mechanical equipment, in particular to a portable electric brush cutter. The utility model provides a portable electronic brush cutter, including the connecting rod, the casing is installed to the one end of connecting rod, be provided with the battery that is used for the power supply in the casing, the other end of connecting rod is connected with driving motor, driving motor's output shaft department is connected with the blade, it is connected with the main handle to be close to casing department on the connecting rod, the one side of keeping away from the casing that lies in the main handle on the connecting rod is provided with strutting arrangement, strutting arrangement is including the supporting shoe that is the U type and the fixed block that is the U type, the opening orientation of supporting shoe and fixed block is with one side, the both sides wall of fixed block is fixed on the outer wall of supporting shoe, the connecting rod is fixed between supporting shoe and fixed block, the both sides wall of supporting shoe all outwards extends and is equipped with the extension piece, be fixed with the auxiliary handle on the extension piece. The invention has convenient operation and can improve the operation efficiency.

Description

Portable electric brush cutter

Technical Field

The invention relates to the technical field of agricultural mechanical equipment, in particular to a portable electric brush cutter.

Background

The brush cutter is also called as a mower, the power is divided into electric power and internal combustion power, the internal combustion power is divided into a two-stroke gasoline engine and a four-stroke gasoline engine, the transmission modes are divided into flexible shaft transmission and straight rod transmission, and the brush cutter is quite wide in application.

The brush cutter is mainly applied to landscaping, yard maintenance, highway cleaning, forest fire prevention, crop harvesting and the like.

The structure of the existing brush cutter is too simple, so that the brush cutter is inconvenient to operate and low in working efficiency.

For example, Chinese patent publication numbers are: CN109644665A, a brush cutter which is announced in 2019, 4, 19 and reduces the negative load by the rotation of a cutting knife, comprising a handle; the bottom of the handle bar is fixedly connected with a motor, a shell is arranged on the outer side of the motor, a fixed rod is fixedly connected between the motor and the shell, the bottom of the motor is rotatably connected with a main shaft, the bottom of the main shaft is fixedly connected with a cutting knife, a driving wheel is fixedly connected above the main shaft and positioned on the inner side of the shell, and both sides of the driving wheel are engaged and connected with driven wheels; although this brush cutter can improve brush cutter's subtract burden effect, the operation is inconvenient, leads to the operating efficiency low.

Disclosure of Invention

The invention mainly aims to solve the problems that the brush cutter in the prior art is inconvenient to operate and low in working efficiency due to the fact that the brush cutter is too simple in structure, and provides a portable electric brush cutter which is convenient to operate and capable of improving the working efficiency.

The purpose of the invention is mainly realized by the following scheme: the utility model provides a portable electric brush cutter, includes the connecting rod, the one end of connecting rod install the casing, the casing in be provided with the battery that is used for the power supply, the other end of connecting rod be connected with driving motor, driving motor's output shaft department be connected with the blade, the connecting rod on be close to casing department and be connected with the main handle, the connecting rod on lie in one side of keeping away from the casing of main handle and be provided with strutting arrangement, strutting arrangement including the supporting shoe that is the U type and the fixed block that is the U type, the opening orientation of supporting shoe and fixed block with one side, the both sides wall of fixed block fix on the outer wall of supporting shoe, the connecting rod fix between supporting shoe and fixed block, the both sides wall of supporting shoe all outwards extend and be equipped with the extension piece, the extension piece on be fixed with auxiliary handle. The machine shell is installed at one end of the connecting rod, a storage battery used for supplying power is arranged in the machine shell, a driving motor is connected to the other end of the connecting rod, a blade is connected to an output shaft of the driving motor, the storage battery can supply power to the driving motor, the storage battery is a lithium battery pack, the machine shell is relatively environment-friendly and longer in service life, when the driving motor is started, the blade can be driven to rotate by the output shaft of the driving motor, trimming operation is carried out, a main handle is connected to the connecting rod close to the machine shell, a supporting device is arranged on the connecting rod and located on one side, far away from the machine shell, of the main handle, the supporting device comprises a U-shaped supporting block and a U-shaped fixing block, openings of the supporting block and the fixing block face towards the same side, two side walls of the fixing block are fixed to the outer wall of the supporting block, the connecting rod is fixed between the supporting block and the fixing block, and extension blocks are arranged on the two side walls of the supporting block in an outward extending mode, the auxiliary handle is fixed on the extension block, when a worker uses the brush cutter, the worker can conveniently move and operate the brush cutter to trim by holding the main handle with one hand and holding the auxiliary handle with the other hand, and therefore the operation efficiency is improved.

Preferably, the main handle is provided with a control switch for controlling the operation of the whole device. Be provided with the control switch who is used for controlling whole device operation on the main handle, control switch can control opening of driving motor and stop and rotational speed to the staff of being convenient for carries out the efficient operation of pruning, sets up the staff operation of being more convenient for on the main handle.

Preferably, the blade is a three-tooth blade. The blade is a three-tooth blade, and the trimming and cutting efficiency is high.

Preferably, a protective cover is arranged on the connecting rod close to the driving motor. The connecting rod is provided with the protection casing near driving motor department, and the setting of protection casing can effectually block weeds, the branch that will cut down, prevents the vegetable debris injury staff that flies in disorder.

Preferably, the connecting rod comprises an upper rod and a lower rod, the upper rod is connected with the casing, the main handle and the supporting device, the lower rod is connected with the driving motor, the upper rod and the lower rod are connected through a telescopic device, the telescopic device comprises a fixed rod connected with the upper rod and a telescopic rod connected with the lower rod, the fixed rod is provided with a fixed hole matched with the telescopic rod, the telescopic rod is positioned in the fixed hole and is connected with the fixed hole in a sliding way, a telescopic motor is arranged on the bottom surface of the fixing hole, an internal thread hole is arranged at one end of the telescopic rod close to the telescopic motor, the internal thread hole is internally connected with an external thread rod, the output shaft of the telescopic motor is connected with the external thread rod, the side wall of the fixing hole is provided with an anti-deflection groove, and the telescopic rod is provided with an anti-deflection block which is in sliding connection with the anti-deflection groove. The connecting rod comprises an upper rod and a lower rod, the upper rod is connected with the casing, the main handle and the supporting device, the lower rod is connected with the driving motor, the upper rod and the lower rod are connected through a telescopic device, the length of the connecting rod can be adjusted through the design of the telescopic device, and therefore workers with different body sizes can conveniently work, the telescopic device comprises a fixed rod connected with the upper rod and a telescopic rod connected with the lower rod, a fixed hole matched with the telescopic rod is formed in the fixed rod, the telescopic rod is located in the fixed hole and is in sliding connection with the side wall of the fixed hole, a telescopic motor is arranged on the bottom surface of the fixed hole, an inner threaded hole is formed in one end, close to the telescopic motor, of the telescopic rod, an outer threaded rod is in threaded connection with the inner threaded hole, an output shaft of the telescopic motor is connected with the outer threaded rod, an anti-deflection groove is formed in the side wall of the fixed hole, and an anti-deflection block in sliding connection with the anti-deflection groove is arranged on the telescopic rod, the control switch can control the forward rotation, the reverse rotation and the stop of the telescopic motor, when the telescopic motor rotates forwards, the output shaft of the telescopic motor drives the external threaded rod to rotate forwards, and the anti-deflection block limits the rotation of the telescopic rod, so that the telescopic rod can only move along the axial direction of the external threaded rod and in the direction away from the telescopic motor, the length of the connecting rod can be lengthened, and the telescopic motor is convenient for a worker to use; similarly, when the telescopic motor rotates reversely, the telescopic rod can only move along the axial direction of the external thread rod and towards the direction close to the telescopic motor, so that the length of the connecting rod can be reduced, and the telescopic rod is convenient for workers with different body types to use; when the telescopic motor stops, the length of the connecting rod is fixed.

Preferably, the number of the anti-deflection blocks is two, and the two anti-deflection blocks are symmetrically distributed along the axis of the telescopic rod. The quantity of preventing the deflection piece is two, and two prevent that the deflection piece distributes along the axis symmetry of telescopic link for stability when telescopic link axial displacement is higher.

Preferably, the bottom of one of the extending blocks is connected with a connecting block through a multifunctional part, the connecting block is provided with a multifunctional plate, the multifunctional part comprises an operating head, the operating head is provided with a cylindrical rod, one end of the cylindrical rod, which is far away from the operating head, is connected with a limiting rod, the cross section of the limiting rod is in a regular polygon shape, the diameter of the cylindrical rod is smaller than or equal to the distance between the centers of the limiting rod, the connecting block is provided with a limiting hole matched with the limiting rod and the cylindrical rod, the extending block is provided with an extending hole matched with the limiting rod and the cylindrical rod, the cross sections of the limiting hole and the extending hole are in a regular polygon shape matched with the limiting rod, the side wall of the limiting rod is provided with a first mounting groove, a first limiting block is slidably arranged in the first mounting groove, and the bottom surface of the first limiting block is connected with the first mounting groove through a first spring, the side wall of the extension hole is provided with a first clamping groove corresponding to the first limiting block, one side of the first limiting block, which is far away from the end part of the first spring, is provided with a first outlet guide surface, the other side of the first limiting block, which is far away from the end part of the first spring, is provided with a first inlet guide surface, the side wall of the limiting rod, which is symmetrical to the first mounting groove, is correspondingly provided with a second mounting groove, the second mounting groove is internally provided with a second limiting block in a sliding manner, the bottom surface of the second limiting block is connected with the second mounting groove through a second spring, the side wall of the extension hole is provided with a second clamping groove corresponding to the second limiting block, one side of the second limiting block, which is far away from the end part of the second spring, is provided with a second outlet guide surface, the other side of the second limiting block, which is far away from the end part of the second spring, and the first mounting groove is closer to the cylindrical rod than the second mounting groove, the distance between the first mounting groove and the second mounting groove in the axial direction of the cylindrical rod is smaller than the distance between the first clamping groove and the second clamping groove in the axial direction of the cylindrical rod, when the first limiting block is positioned inside the first clamping groove, part of the limiting rod is positioned in the limiting hole, and when the second limiting block is positioned inside the second clamping groove, the limiting rod is positioned outside the limiting hole. The design of the structure enables the multifunctional plate to achieve different functions, most brush cutters in the prior art are difficult to store, the occupied space is large when the brush cutters are placed at will, if the brush cutters are placed at will, the brush cutters are easy to take by children to play, the risk is large, when the brush cutters are not used, the limiting rod is firstly inserted into the limiting hole and the extending hole by moving the operating head, when the limiting rod is in different positions, the multifunctional plate has different using methods, when the limiting rod passes through the limiting hole to enter the extending hole, the first limiting block can enter the first clamping groove under the action of the first spring along with the movement of the limiting rod, when the first limiting block is positioned in the first clamping groove, part of the limiting rod is positioned in the limiting hole, the cross section of the limiting rod is a regular polygon, and the cross sections of the limiting hole and the extending hole are both in a regular polygon matched with the limiting rod, therefore, the limiting rod limits the rotation of the connecting block at the moment, so that the connecting block and the multifunctional plate are fixed and cannot rotate; when the limiting rod continues to move towards the inside of the extending hole, so that the second limiting block can enter the second clamping groove under the action of the second spring, when the second limiting block is positioned in the second clamping groove, the limiting rod is positioned outside the limiting hole, the cylindrical rod is positioned in the limiting hole at the moment, the design of the cylindrical rod cannot influence the rotation of the connecting block, so that in the state, the connecting block and the multifunctional plate can rotate along the cylindrical rod, the design of the first inlet guide surface and the first outlet guide surface on the first limiting block and the design of the second inlet guide surface and the second outlet guide surface on the second limiting block enable a worker to bear force so as to overcome the spring force and separate from the corresponding first clamping groove or second clamping groove when moving the operating head, therefore, the multifunctional plate can be correspondingly divided into a fixed use state and a rotatable use state according to whether the first limiting block is positioned in the first clamping groove or the second limiting block is positioned in the second clamping groove, when the worker wants to use the brush cutter, the operating head is moved to enable the first limiting block to enter the first clamping groove, so that the position of the multifunctional plate is fixed, thereby not hindering the trimming operation of the staff, when the brush cutter is to be stored, the brush cutter can be moved to ensure that the opening of the U-shaped supporting block on the brush cutter is clamped into the upright pole, the vertical rod can be a common clothes drying vertical rod in a home, then the operating head is moved to enable the second limiting block to enter the second clamping groove, so that the multifunctional plate can rotate, then the multifunctional plate is rotated to limit the upright rod between the supporting block and the multifunctional plate, then the first limiting block is moved into the first clamping groove, the multifunctional plate is fixed, and at the moment, the brush cutter is limited on the upright stanchion, so that the brush cutter occupies small storage space, is not easy to be taken by children to play, and prevents the occurrence of accidents; when will using the brush cutter, remove the operating head, with the second stopper immigration second draw-in groove for the multi-functional board can rotate, thereby can break away from the pole setting with the brush cutter smoothly, although this design operation is comparatively convenient moreover, nevertheless difficult by child's institute, the security is very high.

Preferably, the cross section of the limiting rod is in a regular quadrangle. The cross section of the limiting rod is in a regular quadrangle shape, and the limiting rod is convenient to operate.

Preferably, the auxiliary handle is U-shaped, and two ends of the auxiliary handle are fixed on the two extending blocks in a one-to-one correspondence manner. The auxiliary handle is U-shaped, the two ends of the auxiliary handle are fixed on the two extending blocks in a one-to-one correspondence mode, and the U-shaped auxiliary handle is convenient for workers to hold, so that the whole brush cutter can be well operated.

Preferably, the connecting rod is made of stainless steel or aluminum alloy. The connecting rod is made of stainless steel or aluminum alloy, so that the strength is high and the service life is long.

Therefore, the portable electric brush cutter has the following advantages: the multifunctional brush cutter is simple to operate, the operation efficiency can be improved, the length of the connecting rod can be adjusted through the design of the telescopic device, so that workers with different heights and body shapes can conveniently operate, and the multifunctional brush cutter can be conveniently placed and prevented from being taken by children for use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view of the multifunctional member, the multifunctional plate, the connecting block and the extending block of the present invention.

Fig. 3 is a sectional view of the first stopper entering the first slot.

Fig. 4 is a cross-sectional view of the second stopper entering the second notch.

Fig. 5 is a sectional view of the multi-functional member of the present invention.

Fig. 6 is a cross-sectional view at a in fig. 1.

Illustration of the drawings: 1-a housing, 2-a battery, 3-a control switch, 4-a main handle, 5-a fixed block, 6-an auxiliary handle, 7-a supporting block, 8-an upper rod, 9-a telescopic device, 10-a lower rod, 11-a shield, 12-a driving motor, 13-a blade, 14-a multifunctional plate, 15-an extension block, 16-a first clamping groove, 17-an extension hole, 18-a second clamping groove, 19-a limiting hole, 20-a connecting block, 21-a second mounting groove, 22-a second inlet guide surface, 23-a second limiting block, 24-a second outlet guide surface, 25-a first mounting groove, 26-a limiting rod, 27-a cylindrical rod, 28-an operating head, 29-a first spring, 30-a first inlet guide surface, 31-a first limiting block, 32-a first guide surface, 33-a fixed rod, 34-a telescopic rod, 35-an internal threaded hole, 36-an external threaded rod, 37-an anti-deflection block, 38-a fixed hole, 39-a telescopic motor, 40-an anti-deflection groove and 41-a second spring.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example 1:

as shown in fig. 1, 2, 3, 4, 5, a portable electric brush cutter comprises a connecting rod, a casing 1 is installed at one end of the connecting rod, a storage battery 2 for supplying power is arranged in the casing 1, a driving motor 12 is connected to the other end of the connecting rod, the connecting rod is made of stainless steel or aluminum alloy, the connecting rod is high in strength and long in service life, a blade 13 is connected to an output shaft of the driving motor 12, the blade 13 is a three-tooth blade 13, the trimming and cutting efficiency is high, the storage battery 2 can supply power to the driving motor 12, the storage battery 2 is a lithium battery pack, the portable electric brush cutter is environment-friendly and long in service life, when the driving motor 12 is started, the output shaft of the driving motor 12 can drive the blade 13 to rotate, so that trimming operation is performed, a protective cover 11 is arranged at a position, close to the driving motor 12, the protective cover 11 can effectively block cut weeds and branches, the anti-flying plant debris injury device comprises a connecting rod, a main handle 4 is connected to a position, close to a machine shell 1, of the connecting rod, a supporting device is arranged on one side, far away from the machine shell 1, of the main handle 4, the connecting rod comprises a U-shaped supporting block 7 and a U-shaped fixing block 5, openings of the supporting block 7 and the fixing block 5 face the same side, two side walls of the fixing block 5 are fixed to the outer wall of the supporting block 7, the connecting rod is fixed between the supporting block 7 and the fixing block 5, extending blocks 15 extend outwards from the two side walls of the supporting block 7, an auxiliary handle 6 is fixed to each extending block 15, when a worker uses the brush cutter, one hand holds the main handle 4, the other hand holds the auxiliary handle 6, and therefore the brush cutter can be moved conveniently and operated to trim; the auxiliary handle 6 is U-shaped, the two ends of the auxiliary handle 6 are fixed on the two extending blocks 15 in a one-to-one correspondence mode, the U-shaped auxiliary handle 6 is convenient for workers to hold, and therefore the whole brush cutter is well operated, and operation efficiency is improved.

Be provided with the control switch 3 that is used for controlling the operation of whole device on the main handle 4, control switch 3 can control opening of driving motor 12 and stop and rotational speed to the staff of being convenient for carries out the efficient operation of pruning, sets up the staff operation of being more convenient for on main handle 4.

The connecting rod comprises an upper rod 8 and a lower rod 10, the upper rod 8 is connected with the casing 1, the main handle 4 and the supporting device, the lower rod 10 is connected with the driving motor 12, the upper rod 8 is connected with the lower rod 10 through a telescopic device 9, the length of the connecting rod can be adjusted through the design of the telescopic device 9, and accordingly workers with different body heights and shapes can conveniently work, as shown in figure 6, the telescopic device 9 comprises a fixed rod 33 connected with the upper rod 8 and a telescopic rod 34 connected with the lower rod 10, a fixed hole 38 matched with the telescopic rod 34 is formed in the fixed rod 33, the telescopic rod 34 is located in the fixed hole 38 and is in sliding connection with the side wall of the fixed hole 38, a telescopic motor 39 is arranged on the bottom surface of the fixed hole 38, an internal thread hole 35 is formed in one end, close to the telescopic motor 39, an external thread rod 36 is connected with the internal thread of the internal thread hole 35, and an output shaft of the telescopic motor 39 is connected with the external thread rod 36, the side wall of the fixed hole 38 is provided with an anti-deflection groove 40, the telescopic rod 34 is provided with an anti-deflection block 37 which is in sliding connection with the anti-deflection groove 40, the forward rotation, the reverse rotation and the stop of the telescopic motor 39 can be controlled through the control switch 3, when the telescopic motor 39 rotates forwards, the output shaft of the telescopic motor 39 drives the external threaded rod 36 to rotate forwards, and the anti-deflection block 37 limits the rotation of the telescopic rod 34, so that the telescopic rod 34 can only move along the axial direction of the external threaded rod 36 and towards the direction far away from the telescopic motor 39, the length of the connecting rod can be prolonged, and the use of workers is facilitated; similarly, when the telescopic motor 39 rotates reversely, the telescopic rod 34 can only move along the axial direction of the external threaded rod 36 and towards the direction close to the telescopic motor 39, so that the length of the connecting rod can be reduced, and the telescopic rod is convenient for workers with different body types to use; when the telescopic motor 39 stops, the length of the connecting rod is fixed; the number of the anti-deflection blocks 37 is two, and the two anti-deflection blocks 37 are symmetrically distributed along the axis of the telescopic rod 34, so that the stability of the telescopic rod 34 in the axial movement process is higher.

The bottom of one of the extending blocks 15 is connected with a connecting block 20 through a multifunctional part, the connecting block 20 is provided with a multifunctional plate 14, the multifunctional part comprises an operating head 28, the operating head 28 is provided with a cylindrical rod 27, one end of the cylindrical rod 27 far away from the operating head 28 is connected with a limiting rod 26, the cross section of the limiting rod 26 is in a regular polygon shape, the diameter of the cylindrical rod 27 is smaller than or equal to the size of the center distance of the limiting rod 26, the connecting block 20 is provided with a limiting hole 19 matched with the limiting rod 26 and the cylindrical rod 27, the extending block 15 is provided with an extending hole 17 matched with the limiting rod 26 and the cylindrical rod 27, the cross sections of the limiting hole 19 and the extending hole 17 are in a regular polygon shape matched with the limiting rod 26, the side wall of the limiting rod 26 is provided with a first mounting groove 25, a first limiting block 31 is slidably arranged in the first mounting groove 25, the bottom surface of the first limiting block 31 is connected with the first mounting groove 25 through a first spring 29, a first clamping groove 16 is arranged on the side wall of the extension hole 17 corresponding to the first limiting block 31, a first outlet guide surface 32 is arranged on one side of the first limiting block 31 far away from the end part of the first spring 29, a first inlet guide surface 30 is arranged on the other side of the first limiting block 31 far away from the end part of the first spring 29, a second mounting groove 21 is correspondingly arranged on the side wall of the limiting rod 26 symmetrical to the first mounting groove 25, a second limiting block 23 is arranged in the second mounting groove 21 in a sliding manner, the bottom surface of the second limiting block 23 is connected with the second mounting groove 21 through a second spring 41, a second clamping groove 18 is arranged on the side wall of the extension hole 17 corresponding to the second limiting block 23, a second outlet guide surface 24 is arranged on one side of the second limiting block 23 far away from the end part of the second spring 41, a second inlet guide surface 22 is arranged on the other side of the second limiting block 23 far away from the end part of the second spring 41, the first mounting groove 25 is closer to the cylindrical rod 27 than the second mounting groove 21, correspondingly, the first slot 16 is closer to the cylindrical rod 27 than the second slot 21, the distance between the first slot 25 and the second slot 21 along the axial direction of the cylindrical rod 27 is smaller than the distance between the first slot 16 and the second slot 18 along the axial direction of the cylindrical rod 27, so that the first stopper 31 can enter the first slot 16 earlier, and the first stopper 31 is located in the first slot 16 or the second stopper 23 is located in the second slot 18, and the first stopper 31 and the second stopper do not affect each other, when the first stopper 31 is located in the first slot 16, a part of the stopper 26 is located in the stopper hole 19, and when the second stopper 23 is located in the second slot 18, the stopper 26 is located outside the stopper hole 19, the multifunctional board 14 can achieve different functions due to the structural design, most of the brush cutters in the prior art are not easy to store, and occupy a large space when being placed at will, if the brush cutter is placed randomly, the brush cutter is easy to be taken by children for playing, the risk is high, when the brush cutter is not used, the limiting rod 26 is firstly inserted into the limiting hole 19 and the extending hole 17 by moving the operating head 28, when the limiting rod 26 is positioned at different positions, the multifunctional plate 14 has different using methods, when the limiting rod 26 passes through the limiting hole 19 and enters the extending hole 17, along with the movement of the limiting rod 26, the first limiting block 31 enters the first clamping groove 16 under the action of the first spring 29, when the first limiting block 31 is positioned in the first clamping groove 16, part of the limiting rod 26 is positioned in the limiting hole 19, because the cross section of the limiting rod 26 is in a regular polygon shape, and the cross sections of the limiting hole 19 and the extending hole 17 are in a regular polygon shape matched with the limiting rod 26, the limiting rod 26 limits the rotation of the connecting block 20 at the moment, so that the connecting block 20 and the multifunctional plate 14 are fixed and can not rotate, the cross section of the limiting rod 26 is in a regular quadrilateral shape, and the operation is convenient; when the limiting rod 26 continues to move towards the inside of the extending hole 17, so that the second limiting block 23 can enter the second clamping groove 18 under the action of the second spring, when the second limiting block 23 is located inside the second clamping groove 18, the limiting rod 26 is located outside the limiting hole 19, at this time, the cylindrical rod 27 is located in the limiting hole 19, and the design of the cylindrical rod 27 does not affect the rotation of the connecting block 20, so that in this state, the connecting block 20 and the multifunctional plate 14 can rotate along the cylindrical rod 27, the design of the first inlet guide surface 30 and the first outlet guide surface 32 on the first limiting block 31 and the design of the second inlet guide surface 22 and the second outlet guide surface 24 on the second limiting block 23 enable an operator to overcome the spring force and disengage from the corresponding first clamping groove 16 or second clamping groove 18 by the force applied to the first limiting block 31 or the second limiting block 23 when the operator moves the operating head 28, and thus the multifunctional can be correspondingly engaged with the multifunctional function according to whether the first limiting block 31 is located in the first clamping groove 16 or the second limiting block 23 is located in the second clamping groove 18 The energy plate 14 can be divided into two using states of fixing and rotating, when a worker uses the brush cutter, the operating head 28 is moved to enable the first limiting block 31 to enter the first clamping groove 16, so that the position of the multifunctional plate 14 is fixed, and trimming operation of the worker is not hindered, when the brush cutter is to be stored and placed, the brush cutter can be moved to enable the opening of the U-shaped supporting block 7 on the brush cutter to be clamped on a vertical rod which can be a common clothes drying vertical rod in a home, then the operating head 28 is moved to enable the second limiting block 23 to enter the second clamping groove 18, so that the multifunctional plate 14 can rotate, then the multifunctional plate 14 is rotated to enable the vertical rod to be limited between the supporting block 7 and the multifunctional plate 14, then the first limiting block 31 is moved into the first clamping groove 16, so that the position of the multifunctional plate 14 is fixed, at this moment, the brush cutter is limited on the vertical rod, the storage space is small, and the toy is not easy to be taken by children to play, so that accidents are prevented; when the brush cutter is to be used, the operating head 28 is moved, and the second limiting block 23 is moved into the second clamping groove 18, so that the multifunctional plate 14 can be rotated, the brush cutter can be smoothly separated from the vertical rod, and the brush cutter is not easy to learn by children and has high safety although the brush cutter is convenient to operate.

It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Claims

1. A portable electric brush cutter comprises a connecting rod, a casing is installed at one end of the connecting rod, a storage battery used for supplying power is arranged in the casing, a driving motor is connected with the other end of the connecting rod, a blade is connected with an output shaft of the driving motor, the portable electric brush cutter is characterized in that a main handle is connected with the connecting rod close to the casing, a supporting device is arranged on one side, away from the casing, of the main handle on the connecting rod, the supporting device comprises a U-shaped supporting block and a U-shaped fixing block, openings of the supporting block and the fixing block face to the same side, two side walls of the fixing block are fixed on the outer wall of the supporting block, the connecting rod is fixed between the supporting block and the fixing block, two side walls of the supporting block are provided with extending blocks in an outward extending mode, and an auxiliary handle is fixed on the extending blocks, a protective cover is arranged on the connecting rod close to the driving motor; the bottom of one of the extending blocks is connected with a connecting block through a multifunctional part, the connecting block is provided with a multifunctional plate, the multifunctional part comprises an operating head, the operating head is provided with a cylindrical rod, one end of the cylindrical rod, which is far away from the operating head, is connected with a limiting rod, the cross section of the limiting rod is in a regular polygon shape, the diameter of the cylindrical rod is smaller than or equal to the distance between the centers of the limiting rod and the cylindrical rod, the connecting block is provided with a limiting hole matched with the limiting rod and the cylindrical rod, the extending block is provided with an extending hole matched with the limiting rod and the cylindrical rod, the cross sections of the limiting hole and the extending hole are in a regular polygon shape matched with the limiting rod, the side wall of the limiting rod is provided with a first mounting groove, the first mounting groove is internally provided with a first limiting block in a sliding manner, and the bottom surface of the first limiting block is connected with the first mounting groove through a first spring, the side wall of the extension hole is provided with a first clamping groove corresponding to the first limiting block, one side of the first limiting block, which is far away from the end part of the first spring, is provided with a first outlet guide surface, the other side of the first limiting block, which is far away from the end part of the first spring, is provided with a first inlet guide surface, the side wall of the limiting rod, which is symmetrical to the first mounting groove, is correspondingly provided with a second mounting groove, the second mounting groove is internally provided with a second limiting block in a sliding manner, the bottom surface of the second limiting block is connected with the second mounting groove through a second spring, the side wall of the extension hole is provided with a second clamping groove corresponding to the second limiting block, one side of the second limiting block, which is far away from the end part of the second spring, is provided with a second outlet guide surface, the other side of the second limiting block, which is far away from the end part of the second spring, and the first mounting groove is closer to the cylindrical rod than the second mounting groove, the distance between the first mounting groove and the second mounting groove in the axial direction of the cylindrical rod is smaller than the distance between the first clamping groove and the second clamping groove in the axial direction of the cylindrical rod, when the first limiting block is positioned inside the first clamping groove, part of the limiting rod is positioned in the limiting hole, and when the second limiting block is positioned inside the second clamping groove, the limiting rod is positioned outside the limiting hole.

2. The portable electric brush cutter according to claim 1, wherein the main handle is provided with a control switch for controlling the operation of the whole device.

3. The portable electric brush cutter according to claim 1, wherein said blade is a three-tooth blade.

4. The portable electric brush cutter according to claim 1, 2 or 3, wherein the connecting rod comprises an upper rod and a lower rod, the upper rod is connected with the housing, the main handle and the supporting device, the lower rod is connected with the driving motor, the upper rod and the lower rod are connected through a telescopic device, the telescopic device comprises a fixed rod connected with the upper rod and a telescopic rod connected with the lower rod, the fixed rod is provided with a fixed hole matched with the telescopic rod, the telescopic rod is positioned in the fixed hole and is slidably connected with the fixed hole, the bottom surface of the fixed hole is provided with a telescopic motor, one end of the telescopic rod close to the telescopic motor is provided with an internal threaded hole, the internal threaded hole is internally threaded with an external threaded rod, an output shaft of the telescopic motor is connected with the external threaded rod, and the side wall of the fixed hole is provided with an anti-deflection groove, the telescopic rod is provided with an anti-deflection block which is connected with the anti-deflection groove in a sliding manner.

5. The portable electric brush cutter according to claim 4, wherein the number of the anti-deflection blocks is two, and the two anti-deflection blocks are symmetrically distributed along the axis of the telescopic rod.

6. The portable electric brush cutter according to claim 1, wherein the cross section of the limiting rod is a regular quadrangle.

7. The portable electric brush cutter according to claim 1, 2 or 3, wherein the auxiliary handle is U-shaped, and two ends of the auxiliary handle are fixed on the two extending blocks in a one-to-one correspondence manner.

8. The portable electric brush cutter according to claim 1, 2 or 3, wherein the connecting rod is made of stainless steel or aluminum alloy.