CN105815028B - The line-putting method of grass-mowing machine and grass-mowing machine - Google Patents

Abstract

The present invention provides a kind of line-putting method of grass-mowing machine and grass-mowing machine, grass-mowing machine includes extension rod, casing, moving head, handle, main motor, main switch, moving head includes holding seat, lid, drum, drum has and the first state of holding seat geo-stationary, grass-mowing machine also includes payingoff mechanism, the grass-mowing machine also includes payingoff mechanism, the payingoff mechanism includes the unwrapping wire electronic switch independently of the main switch, and control device, the unwrapping wire electronic switch operationally electrically controls the control device drum is in the second state that can produce rotary speed difference between the holding seat.Operator need not interrupt the work of grass-mowing machine in the course of the work, can as needed can instant unwrapping wire, payoff operation is simple, conveniently.

Description

The line-putting method of grass-mowing machine and grass-mowing machine

Technical field

The present invention relates to a kind of garden instrument, more particularly to a kind of grass-mowing machine.

Background technology

Green vegetation is a kind of essential environmental key-element of our mankind, and the consciousness of greening becomes more and more popular.Nothing By the courtyard for being golf course, football pitch, villa garden, villa, or common residential area, green turf is ubiquitous, gives The life of people brings life and vigor.But if having left arranging for people, these turfs can become height and rise and fall, be mixed and disorderly Without chapter.

Grass-mowing machine is just favored as a kind of garden instrument for arranging turf by more and more users.Grass-mowing machine is general It is allowed to beat the grass by driving line rotation of beating the grass, generally includes the extension rod of lengthwise extension, the moving head located at extension rod one end, sets In the handle on extension rod and with moving head setting spaced apart, the motor of driving moving head rotation, moving head includes receiving Holder and the lid of holding seat mating, drum between holding seat and lid is arranged on, line of beating the grass is wrapped on drum and from collecting Stretched out on seat.During work, moving head is driven in rotation drive and beats the grass line locking rotation so as to beat the grass.

Grass-mowing machine generally has two kinds of use states, and a kind of use state is conventional state of beating the grass, and now, makes line of beating the grass It is parallel with ground level to rotate the plane formed, for quickly being arranged to the lawn of bulk；Another use state is to repair Side state, now, the line that makes to beat the grass rotate that the plane to be formed is vertical with ground level, for being arranged to the lawn of road edge.

Because line of beating the grass rotates and beat the grass, therefore, line end of beating the grass is very easy to abrasion, and the line of beating the grass after abrasion does not reach Required radius of beating the grass, efficiency of beating the grass substantially reduce.Therefore, need to set payingoff mechanism on grass-mowing machine, to adjust on suitable opportunity Whole line of beating the grass stretches out the length of holding seat.

Common payingoff mechanism has two kinds, and one kind is switching on and shutting down automatic paying-out mechanism, as its name suggests, switching on and shutting down payingoff mechanism In each startup and shutdown can automatic unwrapping wire, can all be put without extra operation, but just because of each startup and shutdown Line, line loss of beating the grass loss-rate are more serious.Another kind is to tap payingoff mechanism, and tapping payingoff mechanism has the triggering for protruding from lid Part, lid taps and trigger member is triggered unwrapping wire on the ground during use, its major defect be when grass-mowing machine carries out deburring operation, Needing to invert grass-mowing machine enables lid to tap ground so as to unwrapping wire, not only to interrupt deburring beat the grass work and also operation it is loaded down with trivial details.

In another payingoff mechanism, the operating parts independently of main switch is provided with grip part, will by transmission connection piece The motion of operating parts is transferred to drum, drum is produced speed difference with respect to holding seat and carries out unwrapping wire.But this manual paying out machine Structure needs to set the driving member of the extension rod substantially through lengthwise extension, the motion of manual handle member could be transferred into drum. It is arranged to concertina type or dismounting type accordingly, with respect to the extension rod of extension, the setting structure of driving member is complicated, and reliability obtains not To guarantee.

The content of the invention

The defects of to overcome prior art, problem to be solved by this invention are to provide a kind of line loss of beating the grass that reduces and consume and grasp Make convenient grass-mowing machine.

To solve the above problems, the technical scheme is that：A kind of grass-mowing machine, including lengthwise extension extension rod, set Casing in described extension rod one end, the handle on the extension rod and with casing setting spaced apart, connect The moving head of the casing is connected to, drives the moving head to enclose the main motor rotated about the axis, control the master of the main motor to open Close, the moving head includes holding seat, the lid being coupled with holding seat, the top-stitching for being arranged on the holding seat and the lid Disk, the drum has and the first state of the holding seat geo-stationary, it is characterised in that：The grass-mowing machine also includes unwrapping wire Mechanism, the payingoff mechanism include the unwrapping wire electronic switch and control device independently of the main switch, the unwrapping wire electronics Switch operationally electrically controls the control device to be in drum can produce rotary speed difference between the holding seat Second state.

Preferably, the speed of service of the main motor in the course of the work is constant.

Preferably, the control device includes the electric drive independently of main motor, and the payingoff mechanism includes being driven by electricity The transmission device of dynamic device driving, the electric drive is by drum described in the actuator drives in first state and the second shape Moved between state.

The electric drive includes the secondary motor independently of main motor.The transmission device includes being arranged at time motor and line The rotary motion of secondary motor is converted into drum with respect to holding seat energy by the movement conversion mechanism between disk, the movement conversion mechanism Produce the rotary motion of speed difference.The movement conversion mechanism includes the driving member of the fixed output shaft for being coupled to time motor, by The pivotal part of driving member driving, and the middleware driven by pivotal part, the middleware driving drum produce with respect to holding seat Motion.

Preferably, the driving member is arranged to the fixed eccentric cam for being coupled to output shaft, and pivotal part is arranged to pivot Axle is the lever of pivot, and the first end of lever is fixedly connected on casing, the second end and the bias of lever by its pivoting axis The peripheral surface of cam abuts against.

In another selectively scheme, the driving member is arranged to the fixed edge cam for being coupled to output shaft, pivots Part is arranged to the lever using pivotal axis as pivot, and the first end of lever is fixedly connected on casing, lever by its pivoting axis The second end and the cam surface of edge cam abut against.

Further, the elastic component set between the pivotal part and casing.

Preferably, the transmission device further comprises being arranged on secondary reducing gear between motor and driving member.It is described Reducing gear is arranged to planetary wheeling mechanism.

The control device also includes the stop device that control time motor stops the rotation.It is single that the stop device includes sensing Member, and receive the signal of sensing unit and to secondary motor stop the control unit of control.

Preferably, the sensing element includes the hall sensor for being arranged at casing, and is arranged at the magnetic of transmission device Property part, the hall sensor are disposed proximate to magnetic part.

A kind of scheme, the motor drive shaft of the relatively main motor of motor drive shaft of the secondary motor are vertically arranged.

It is another that selectively scheme, the motor drive shaft of the relatively main motor of motor drive shaft of the secondary motor be arranged in parallel.

Preferably, the electric drive includes electromagnet.The electromagnet has the output end moved linearly, the biography Dynamic device includes the 3rd power train being arranged between output end and drum.

Preferably, tumbler of the 3rd power train including being pivotally connected to casing, the sliding part driven by tumbler, The sliding part driving drum produces motion with respect to holding seat.The tumbler is arranged to the thick stick using pivotal axis as pivot Bar, its pivoting axis are arranged at the middle part of lever, and the first end of lever is connected with output end, the second end and the sliding part phase of lever Abut.

Preferably, the energization and power-off of the unwrapping wire electronic switch control electromagnet.

Another scheme, the control device include the control circuit being electrically connected with main motor, and the control circuit is used Changed in controlling main motor between normal operating rate and payingoff speed.The control circuit is PWM circuit.

Preferably, the payingoff speed is less than operating rate.

Preferably, the control circuit is brake switch circuit.

Another scheme, the payingoff speed are more than operating rate.

Preferably, when the main switch starts, the drum is in first state, when the unwrapping wire electronic switch starts, The drum is in the second state.

Preferably, sliding block is provided between the holding seat and the drum, the sliding block is circumferentially solid with the holding seat Determine and radially-displaceable mating, the payingoff mechanism also includes the stop device for being movably arranged at the holding seat, the backstop dress Put with first position and the second place, when the stop device is in first position, the stop device limits the sliding block Relative to moving radially for the holding seat, when the stop device is in the second place, the sliding block is relative to the collecting Seat is radially movable.

Preferably, the stop device includes pivoting the stop part located at the holding seat, and during first position, stop part stops Keep off the sliding block, during the second place, the stop part disengages with the sliding block.

Preferably, when starting the unwrapping wire electronic switch, the stop part is in the presence of inertia force, relative to the receipts Holder is switched to the second place from first position.

Preferably, when discharging the unwrapping wire electronic switch, the stop part is switched to first position from the second place.

Preferably, the stop device is included located at the resetting means between the stop part and holding seat, the reset Device promotes the stop part to recover from the second place to first position.

Preferably, the pivot axis of the stop part is overlapping with the axis that the holding seat rotates.

Preferably, when starting the main switch, the stop part, which is in, limits the sliding block relative to the holding seat footpath To mobile first position.

Preferably, the drum is provided with the serrate slot of circumferentially extending, and the serrate slot includes the first tooth being oppositely arranged The number of tooth on shape side and the second serrated edge, first serrated edge and second serrated edge it is identical and it is circumferential stagger set Put, the tooth includes the sagittal plane radially extended, and the protrusion that can be moved radially in the serrate slot is provided with the sliding block Tooth, when the projecting teeth abuts with the sagittal plane, the drum is located at the first state；The projecting teeth not with the footpath When being abutted to face, the drum is located at second state.

Preferably, the tooth includes the circumferential surface of peripheral, oblique extension, when the projecting teeth abuts with the circumferential surface, institute State drum and be located at second state.

Preferably, bias piece is provided between the holding seat and the sliding block, the bias piece exerts a force to the sliding block The projecting teeth is set to keep abutting with the sagittal plane.

Preferably, circumferential movement of the drum along the axis.

Another scheme, axial movement of the drum along the axis.

Preferably, the main switch is electrically connected with control device.

Preferably, the unwrapping wire electronic switch is arranged on the grip part of handle or the close position of grip part.Handle bag The main handle and assist handle of setting spaced apart are included, main switch is arranged on main handle, and unwrapping wire electronic switch is arranged on On assist handle.

Preferably, the unwrapping wire electronic switch is single-pole double-throw switch (SPDT), and single-pole double-throw switch (SPDT) selectively closes in first Position and the second closing position are closed, starts the main switch, makes drum and holding seat synchronous rotary, now at single-pole double-throw switch (SPDT) In the first closing position；Start single-pole double-throw switch (SPDT), single-pole double-throw switch (SPDT) is changed to the second closure position from the first closing position Put, make to produce speed difference between drum and holding seat；Single-pole double-throw switch (SPDT) is discharged, by single-pole double-throw switch (SPDT) from the second closing position Recover to the first closing position, make to produce speed difference between drum and holding seat, after preset time, drum recovers same with holding seat Step rotation.

The present invention also realizes that line-putting method includes following operating procedure by a kind of line-putting method of grass-mowing machine：Startup is put Line electronic switch, make to produce speed difference between drum and holding seat.

Preferably, operating procedure further comprises discharging the unwrapping wire electronic switch.

Preferably, before starting unwrapping wire electronic switch, first starting main switch makes the rotation synchronous with drum of main motor driving holding seat Turn.

Another line-putting method, including following operating procedure：Start main switch, make drum and holding seat synchronous rotary；Open Dynamic unwrapping wire electronic switch, makes to produce speed difference between drum and holding seat, after preset time, drum rotation synchronous with holding seat recovery Turn.

Compared with prior art, grass-mowing machine of the invention includes payingoff mechanism, and the payingoff mechanism passes through independently of main switch Unwrapping wire electronic switch control, the waste of each switching on and shutting down all unwrapping wire is avoided, so as to reduce the loss for line of beating the grass；And unwrapping wire Electronic switch is arranged on the grip part of handle or the close position of grip part, and operator, which can be in one's hands while stopping handle, to be controlled Unwrapping wire electronic switch and unwrapping wire, it is easy to operate without interrupting the work of grass-mowing machine.

Brief description of the drawings

The invention will be further described with embodiment below in conjunction with the accompanying drawings.

Fig. 1 is the complete machine diagrammatic cross-section for the grass-mowing machine that first embodiment of the invention provides.

Fig. 2 is the amplification view at the grass-mowing machine head shown in Fig. 1, and now, lever is located at position of rest.

Fig. 3 is the amplification view at the grass-mowing machine head shown in Fig. 1, now, the motion of lever actuated drum.

Fig. 4 is the perspective exploded view of payingoff mechanism in grass-mowing machine head shown in Fig. 1.

Fig. 5 to Fig. 9 be grass-mowing machine shown in Fig. 1 during payingoff mechanism controls unwrapping wire, the state of sliding block and drum The schematic diagram of change procedure.

Figure 10 is along the Hall element in the grass-mowing machine head of hatching line A-A positions and the magnetic part phase on driving member in Fig. 2 To the enlarged diagram of position, now, Hall element and magnetic part are mutually close.

Figure 11 is along the Hall element in the grass-mowing machine head of hatching line B-B positions and the magnetic part phase on driving member in Fig. 3 To the enlarged diagram of position, now, Hall element and magnetic part stagger 180 degree.

Figure 12 is the schematic flow sheet of payingoff mechanism control drum unwrapping wire in Fig. 1.

Figure 13 is the amplification profile schematic diagram at the grass-mowing machine head of second embodiment of the invention.

Figure 14 is the amplification profile schematic diagram at third embodiment of the invention grass-mowing machine head.

Figure 15 is along the lever and the mating relation schematic diagram of sliding part shown in hatching line C-C in Figure 14.

Figure 16 to Figure 20 be grass-mowing machine shown in Figure 14 during payingoff mechanism controls unwrapping wire, drum and holding seat and The schematic diagram of the state change process of lid；

Figure 21 is to the control circuit operating diagram that 23 figures are four, the 5th embodiment grass-mowing machines of the invention.

Figure 24 is the main motor rotary speed change schematic diagram of fourth embodiment of the invention grass-mowing machine.

Figure 25 is the main motor rotary speed change schematic diagram of fifth embodiment of the invention grass-mowing machine.

Figure 26 is the four, the 5th embodiment grass-mowing machine unwrapping wire control operation flow charts of the invention.

Figure 27 to Figure 29 is the control circuit operating diagram of sixth embodiment of the invention grass-mowing machine.

Figure 30 is the main motor rotary speed change schematic diagram of sixth embodiment of the invention grass-mowing machine.

Figure 31 is the amplification profile schematic diagram at seventh embodiment of the invention grass-mowing machine head.

Figure 32 is the perspective exploded view of payingoff mechanism in grass-mowing machine head shown in Figure 31.

Figure 33 to Figure 35 be grass-mowing machine shown in Figure 31 during payingoff mechanism controls unwrapping wire, sliding block and stop device State change process schematic diagram.

Figure 36 is the perspective exploded view of payingoff mechanism in eighth embodiment of the invention grass-mowing machine head.

During Figure 37 to Figure 39 is the grass-mowing machine payingoff mechanism control unwrapping wire shown in Figure 36, sliding block and stop device The schematic diagram of state change process.

Wherein,

The battery bag 56a motor drive shafts of 100 grass-mowing machine 38

The rolling factional members of 20 39 first serrated edge of extension rod 57

The output shaft of 22 moving head, 40 unwrapping wire electronic switch 58

The eccentric cam of 23 41 second serrated edge of main handle 60

The edge cam of 24 assist handle, 42 lever 60 '

The flexible member of 25 casing, 44 lever first end 61

The 26 main teeth of 45 sagittal plane of motor 63 first

The tooth of 27 main switch, 46 the second end of lever 65 second

The planetary wheeling mechanism of 28 holding seat, 47 circumferential surface 66

The tooth of arm 67 the 3rd in the lever of 30 lid 48

The hall sensor of 32 drum, 49 projecting teeth 68

The tooth of 33 sliding block, 50 pivotal axis 69 the 4th

34 beat the grass the electromagnet of 52 elastic component of line 70

The inclined-plane 70a output ends of 34a free terminals 53 first

The magnetic part of 35 bar hole, 54 bias piece 72

The middleware of 36 55 second inclined-plane of rotary shaft 74

The 37 motor 74a centre bores of serrate slot No. 56 times

The grass-mowing machine of 75 through hole, 176 bearing 200

The grass-mowing machine of 78 limited part, 178 locating part 300

The grass-mowing machine of 142 180 first confined planes of lever 400

The stop device of 144 182 second confined planes of lever first end 401

Raised 403 stop parts in 146 the second end of lever 184

The resetting means of 150 pivotal axis, 186 stopper section 405

The projection of 154 bias piece 190

The retainer of 174 sliding part 192

Embodiment

Fig. 1 to Figure 12 shows the grass-mowing machine 100 that first embodiment of the invention provides.

Fig. 1 is referred to, the grass-mowing machine 100 of the present embodiment includes the extension rod 20 of lengthwise extension, located at the one end of extension rod 20 Head, head includes casing 25, the main motor 26 that is arranged in casing 25 and is driven around axis rotation by main motor 26 The moving head 22 turned；Grass-mowing machine 100 also includes on extension rod 20 and the handle with 25 setting spaced apart of casing, control Make the main switch 27 of main motor.Moving head 22 includes holding seat 28, the lid 30 being coupled with holding seat 28, is arranged on holding seat 28 The drum 32 of the inner chamber formed with lid 30.Drum 32 has and the first state of the geo-stationary of holding seat 28.When main switch 27 When controlling the rotation of main motor 26, drum 32 is in first state and the synchronous rotary of holding seat 28.

When grass-mowing machine 100 works, the line 34 that will beat the grass is wrapped on drum 32 and stretched out from holding seat 28, the quilt of moving head 22 During the main driving of motor 26 rotation, the free terminal 34a of line 34 of beating the grass stretching holding seat 28 and the inner chamber of lid 30, which rotates to be formed, to be cut Face.Grass-mowing machine 100 is lifted the cut surface that the line 34 that makes to beat the grass is formed along its rotation by handle and beaten the grass by user.Grass-mowing machine 100 It can be changed in beating the grass for the free terminal 34a of line 34 horizontal rotations of beating the grass between state and the deburring state that rotates vertically, to meet not Same cutting use demand.

For convenience of description, " axial direction " of this specification, " circumference " and other descriptions related to orientation are with moving head 22 rotation axis is reference.If " axial direction " is the bearing of trend along the rotation axis of moving head 22；" circumference " is around moving head The direction of 22 rotation axis.

In the present embodiment, the main motor 26 of driving moving head 22 is coaxially disposed with moving head 22, more excellent, main motor 26 Output shaft directly drives moving head 22, i.e. the rotary shaft 36 of moving head 22 is output shaft for the motor drive shaft of main motor 26, and structure is simple It is single compact.Anywhere and lead to it may occur to persons skilled in the art that main motor 26 can be also arranged on to the other of extension rod 20 Cross specific transmission mechanism driving moving head 22 and rotate and also may be used.

In the present embodiment, the one end of extension rod 20 away from moving head 22 is provided with power supply, specially dc source, direct current Source is using battery bag 38, preferably lithium battery pack.Thus, dc source and moving head 22 are divided into the two of extension rod 20 End, and handle is arranged on the position of relatively close electric drive on extension rod 20, so as to which the whole center of gravity of grass-mowing machine 100 layout is closed Reason, operator is lifted by handle can be more laborsaving when grass-mowing machine 100 works.

Grass-mowing machine 100 also includes payingoff mechanism, and payingoff mechanism includes the unwrapping wire electronic switch 40 independently of main switch 27, with And control device, and control device, unwrapping wire electronic switch operationally electrically control the control device drum is in energy The second state of rotary speed difference is produced between the holding seat.In the present embodiment, the rotation speed of main motor at work is not Become；Control device includes electric drive, and payingoff mechanism includes the transmission device driven by electric drive, and electric drive passes through transmission Device driving drum moves between the first state and a second state.Specifically, electric drive is time being arranged in casing 25 Motor 56, secondary motor 56 control startup by unwrapping wire electronic switch 40.When main switch 40 controls main motor 26 to rotate, unwrapping wire electronics Switch 40 starts time motor 56 and drives drum 32 to move to the second state for producing rotary speed difference with holding seat 28.Unwrapping wire electronics Switch 40 is arranged on the grip part of handle or the close position of grip part.In the present embodiment, secondary motor 56 and the main phase of motor 26 Vertically, that is to say, that the motor drive shaft 36 of the relatively main motors 26 of the motor drive shaft 56a of secondary motor 56 is vertically arranged, and the present embodiment is vertical Including the vertical relation or the vertical relation of antarafacial in same plane.

Shown in reference picture 2, Fig. 3, in first state, drum 32 and the synchronous rotary of holding seat 28, it is wrapped on drum 32 Beat the grass line 34 and the synchronous rotary of holding seat 28, the part rotation that line 34 of beating the grass stretches out holding seat 28 can beat the grass, you can lawn is entered Row trimming.In the second state, drum 32 departs from holding seat 28, and the centrifugal force of line 34 of beating the grass rotation drives drum 32 and holding seat 28 produce relative motions, and rotary speed is poor so as to producing, and then the centrifugal force for line 34 of beating the grass can pull it outwards to throw away a part Unwrapping wire is realized, i.e., the longer free terminal 34a of line 34 of beating the grass is stretched out outside holding seat 28, grass-mowing machine 100 is had bigger beat the grass Radius.

The grip part of handle refers to the part that operator holds with a hand on handle.Gripping of the unwrapping wire electronic switch adjacent to handle Portion is set, and unwrapping wire electronic switch can be arranged on handle, can also be arranged in the other positions of grass-mowing machine.Refer to Fig. 1, In the present embodiment, handle includes the main handle 23 and assist handle 24 of setting spaced apart, and main switch 27 is arranged on main hand On handle 23, unwrapping wire electronic switch 40 is arranged on assist handle 24.It is arranged such, operator can pass through main handle 23 and auxiliary Handle 24 is more reliable to be lifted and controls grass-mowing machine to work.

In the present embodiment, main switch 27 and unwrapping wire electronic switch 40 are separately positioned on main handle 23 and assist handle 24, The operation of main switch 27 and unwrapping wire electronic switch 40 is non-interference.Operator is controlling the work of grass-mowing machine 100 by assist handle 24 When making, it is desirable to when carrying out payoff operation to drum 32, need to only take advantage of a situation control unwrapping wire electronic switch 40 on assist handle 24, Working condition without changing grass-mowing machine 100, will not also interrupt the work of beating the grass of grass-mowing machine 100, easy to operate, this advantage Become apparent from when grass-mowing machine is in deburring state.

Certainly, unwrapping wire electronic switch 40 is arranged on the other positions of grass-mowing machine, is such as arranged on extension rod 20 close to main hand The opening position of handle or assist handle or be arranged on main handle with main switch it is spaced apart also can, as long as operator's energy Unwrapping wire electronic switch can also be controlled by enough being lifted by handle while grass-mowing machine is allowed to beat the grass.All uses and the present embodiment Similar technical scheme all should cover within the scope of the present invention.

Because the payingoff mechanism is by the unwrapping wire electronic switch control independently of main switch, each open and close machine is avoided all The waste of unwrapping wire, so as to reduce the loss for line of beating the grass；And unwrapping wire electronic switch is adjacent to the grip part setting of handle or set Putting on the grip part of handle, operator, which can be in one's hands while stopping handle triggering main switch, triggers unwrapping wire electronic switch, without Interrupt the work of grass-mowing machine and payoff operation is convenient.Therefore, no matter whether main motor 26 works, by controlling unwrapping wire electronic switch 40 make time motor 56 drive drum 32, make drum 32 and the generation relative motion of holding seat 28 poor so as to produce rotary speed, Realize unwrapping wire.

With further reference to Fig. 2, Fig. 3, secondary motor 56 is provided with output shaft 58, transmission device include being arranged at output shaft 58 with The first power train between drum 32.First power train is movement conversion mechanism, and the rotary motion of secondary motor 56 is converted into Drum can produce the rotary motion of speed difference with respect to holding seat.First power train includes the fixed transmission being coupled on output shaft 58 Part, the pivotal part driven by driving member, and the middleware 74 driven by pivotal part.

In the present embodiment, driving member is arranged to the fixed eccentric cam 60 for being coupled to output shaft 58, pivotal part be arranged to Pivotal axis 50 is the lever 42 of pivot, and the first end 44 of lever 42 is fixedly connected on casing 25, thick stick by its pivoting axis 50 Second end 46 of bar and the cam peripheral surface of eccentric cam 60 abut against.Close to the position at the second end 46 and casing 25 on lever 42 Between the elastic component 52 that sets, the elastic component 52 in the present embodiment can also use other similar functions using extension spring, extension spring Flexible member replace.The effect of elastic component 52 makes cam peripheral surface of the second end of lever 46 all the time with eccentric cam 60 offset Connect.When secondary motor 56 rotates, output shaft 58 drives eccentric cam 60 to rotate together, due to outside eccentric cam 60 cam of itself The construction of envelope surface so that it is moved around pivotal axis 50 overcoming the second end 46 of the active force activation lever 42 of elastic component 52.In addition, Grass-mowing machine 100 sets limiter 78, when direction of the lever 42 along remote holding seat 28, which moves to, to be abutted with limited part 78, thick stick Bar 42 moves to extreme position in the direction.Only starting unwrapping wire electronic switch 40 rotates time motor 56, and lever 42 overcomes this The active force of elastic component 52 could drive drum 32 to move and unwrapping wire, so as to reduce the waste for line of beating the grass.

Lever 42 can be direct or indirect the circumferential movement of driving drum 32.The motion driving drum 32 of lever 42 revolves around it The circumferential movement of shaft axis between the first state and second state so as to move.

Secondary motor 56 has motor drive shaft 56a, it may be preferable that transmission device also includes being arranged on motor drive shaft 56a and output shaft 58 Between the second power train.Second power train is arranged to reducing gear, and the reducing gear in the present embodiment is using the planetary gear for being Mechanism 66.Certainly, those skilled in the art, which are contemplated that, utilizes other reduction gearing mechanisms, such as other gear transmission modes, The modes such as belt wheel transmission are replaced.

With further reference to shown in Fig. 4, Fig. 5, in the present embodiment, lever 42 indirectly drives the circumferential movement of drum 32.It is preferred that , the sliding block 33 of the mating circumferentially fixed and radially-displaceable with holding seat 28 is provided between lever 42 and drum 32.Specifically, Holding seat 28 is provided with the bar hole 35 that radially extends, and sliding block 33 is located in circumferentially fixed with holding seat 28 in bar hole 35 and footpath To movable mating.

Sliding block 33 moves radially, so as to drum 32 can circumferential movement and holding seat 28 generation rotary speed it is poor.On drum 32 Serrate slot 37 provided with circumferentially extending, serrate slot 37 include the first serrated edge 39 and the second serrated edge 41 that are oppositely arranged, and first Serrated edge 39 is identical with the number of the tooth on the second serrated edge 41 and circumferential stagger setting, each tooth bag on the first serrated edge 39 The sagittal plane 45 radially extended and the circumferential surface 47 of peripheral, oblique extension are included, each tooth on the second serrated edge 41 includes radially prolonging The circumferential surface 47 for sagittal plane 45 and the peripheral, oblique extension stretched；Be provided with sliding block 33 can be moved radially in serrate slot 37 it is prominent Go out tooth 49, when projecting teeth 49 abuts with sagittal plane 45, sliding block 33 drives drum 32 and the synchronous rotary of holding seat 28；Projecting teeth 49 with When circumferential surface 47 abuts, sliding block 33 drives drum 32 to be moved with respect to holding seat 28, so as to produce speed difference.

Bias piece 54 is provided between holding seat 28 and sliding block 33, bias piece 54 makes the retainer belt of sliding block 33 to the force of sliding block 33 Moving-wire disk 32 and the synchronous rotary of holding seat 28.Thus, the active force of bias piece 54 is only overcome to drive sliding block 33 to slide ability band The circumferential movement of moving-wire disk 32 and the generation of holding seat 28 rotary speed are poor.The bias piece 54 of the present embodiment is helical spring, this area Technical staff is it is contemplated that other bias pieces, such as extension spring also can reach same effect.

The middleware 74 with 28 circumferentially fixed and axially movable mating of holding seat is provided between lever 42 and sliding block 33. Specifically, arm 48 sets perforate in lever, middleware 74 is also equipped with centre bore 74a, and lever 42 passes through its perforate, middleware 74 It is installed on jointly in rotary shaft 36 by centre bore 74a；Lever 42 abutted using arm 48 in its lever with middleware 74 so as to Driver middleware 74.Be provided with axially extending through hole 75 on holding seat 28, middleware 74 partially pass through through hole 75 so as to With 28 circumferentially fixed and axially movable mating of holding seat.

The driver middleware 74 of lever 42 is axially moved so as to drive the radial motion of sliding block 33.Specifically, set on middleware 74 There is the first inclined-plane 53 that direction is obliquely installed to axial, sliding block 33 is provided with the second inclined-plane that direction to axial tilts extension 55, when middleware 74, which is axially facing drum 32, to move, the first inclined-plane 53, which abuts the second inclined-plane 55, makes sliding block 33 produce radially fortune It is dynamic, so as to drive the circumferential movement of drum 32 by the cooperation of projecting teeth 49 and serrate slot 37.It may occur to persons skilled in the art that Only set between middleware 74 and sliding block 33 inclined-plane that an axial direction is obliquely installed also can, it is all using similar with the present embodiment Technical scheme all should cover within the scope of the present invention.

To reduce the friction between lever 42 and middleware 74, the end 46 of lever 42 second is provided with rolling factional members 57, has Body is rolling bearing, and rolling bearing makes the friction between lever 42 and middleware 74 be rolling friction, so as to greatly reduce lever 42 and the abrasion of middleware 74, improve the life-span of grass-mowing machine 100.Certainly, the rolling factional members 57 of other forms, such as ball, rolling Post, end face bearing etc. also may be used.

In the present embodiment, the bullet for being exerted a force to middleware 74 and making its holding be abutted with lever 42 is additionally provided with grass-mowing machine 100 Property element 61, only overcome the flexible member 61 active force can just make middleware 74 be axially facing drum 32 move and to driving The radial motion of sliding block 33, and finally drive the circumferential movement of drum 32.

Thus, in the present embodiment, lever 42 drives drum 32 to move between three positions, in first position, drum 32 In first state；In the second place, drum 32 is in the second state；In the 3rd position, drum 32 is again at first state.

Specifically, as shown in figure 5, in first position, the sagittal plane of the serrated edge 39 of projecting teeth 49 and first on sliding block 33 45 abut, and sliding block 33 can drive drum 32 and the synchronous rotary of holding seat 28.

As shown in fig. 6, in the second place, projecting teeth 49 on the sliding block 33 not radial direction with any tooth on any serrated edge Face 45 abuts, and second is equipped with two kinds of situations：A kind of situation is that projecting teeth 49 abuts with the circumferential surface 47 on the second serrated edge 41, The linear movement of sliding block 33 driving drum 32 rotates relative to holding seat 28；Another situation is that projecting teeth 49 does not also have and circumferential surface 47 abut, and drum 32 rotates drive line 34 of beating the grass and rotated, and centrifugal force caused by line free terminal 34a of beating the grass can equally drive drum 32 rotate relative to holding seat 28.

As shown in fig. 7, in the 3rd position, the projecting teeth 49 on sliding block 33 supports with the sagittal plane 45 on the second serrated edge 41 Connect, sliding block 33 can drive drum 32 and the synchronous rotary of holding seat 28.The direction and lever 42 that bias piece 54 exerts a force to drum 32 are right The force direction of drum 32 is opposite.Specifically, force of the bias piece 54 to the force direction of sliding block 33 with lever 42 to sliding block 33 In the opposite direction, more specifically, bias piece 54 is opposite to the force direction of sliding block 33 with middleware 74 to the force direction of sliding block 33.

Bias piece 54 drives drum 32 to move to the four, the 5th positions from the 3rd position, and in the 4th position, drum 32 is in Second state, in the 5th position, drum 32 is in first state.

Specifically, as shown in figure 8, in the 4th position, projecting teeth 49 on sliding block 33 not with any on any serrated edge The sagittal plane 45 of tooth abuts, and there are two kinds of situations the 4th position：A kind of situation is the circumferential surface of the serrated edge 39 of projecting teeth 49 and first 47 abut, and sliding block 33 drives drum 32 to be rotated relative to holding seat 28, and another situation is, projecting teeth 49 also not with circumferential surface 47 Abut, drum 32 rotates drive and beaten the grass line rotation, and centrifugal force caused by line free terminal 34a of beating the grass can equally drive the phase of drum 32 Holding seat 28 is rotated.

As shown in figure 9, in the 5th position, the projecting teeth 49 on sliding block 33 abuts with the sagittal plane 45 of the first serrated edge 39, Sliding block 33 drives drum 32 and the synchronous rotary of holding seat 28.

Turning back to Fig. 4, balancing weight 51 is provided with sliding block 33, in the present embodiment, balancing weight 51 is rotated to cunning with sliding block 33 Centrifugation force direction is identical to the force direction of sliding block 33 with bias piece 54 caused by block 33.And in the switching on and shutting down payingoff mechanism of routine In, balancing weight rotates opposite to the force direction of sliding block with bias piece to centrifuging force direction caused by sliding block with sliding block.Thus, originally The grass-mowing machine 100 of embodiment sliding block 33 in switching on and shutting down can not drive drum 32 to rotate and unwrapping wire, only can be in unwrapping wire electronic switch During 40 startup, under secondary motor 56 drives, sliding block 33 could drive drum 32 to rotate and unwrapping wire, so as to reduce the loss for line of beating the grass. Certainly, single balancing weight is not provided with sliding block 33, and set on sliding block bias Mass Distribution also can, now, quite In being provided with balancing weight in the part of sliding block heavier mass.

Centrifugation 54 force directions to sliding block 33 of force direction and bias piece are identical caused by balancing weight 51 rotates, this For art personnel it is contemplated that can also be not provided with bias piece, only rotating caused centrifugal force by balancing weight 51 drives drum 32 The four, the 5th positions are moved to from the 3rd position.

In the present embodiment, projecting teeth 49 is two, and two projecting teeths 49 are spaced a spacing on the bearing of trend of sliding block 33 From setting, the distance is the center diameter of a circle of serrate slot 37, so as to which first projecting teeth 49 is nibbled in the first serrated edge 39 with tooth During conjunction, second projecting teeth 49 can the other end of radial direction of serrate slot 37 engaged with the second serrated edge 41, drum 232 can be made Stress is evenly.It may occur to persons skilled in the art that only a projecting teeth is set also may be used.

Control device includes the stop device that control time motor stops the rotation.Stop device includes sensing unit, Yi Jijie Receive the signal of sensing unit and to the control unit of secondary motor shutdown control.In the present embodiment, control unit and the electricity of main switch 27 Property connection.

Shown in reference picture 2, Fig. 3, Figure 10, Figure 11, sensing element includes the hall sensor 68 for being arranged at casing 25, and The magnetic part 72 of transmission device is arranged at, the hall sensor 68 is disposed proximate to magnetic part 72.In the present embodiment, Hall sense Device 68 is answered to be fixedly installed in casing 25, magnetic part 72 is arranged on eccentric cam 60 on the end face of hall sensor 68, Magnetic part 72 is using magnet；Certain magnetic part can also use other tools are magnetic can produce work with hall sensor 68 Material is replaced.

When unwrapping wire electronic switch 40 starts, the secondary rotation driving eccentric cam 60 of motor 56 rotates around secondary motor output shaft 58, Being arranged at the magnetic part 72 of eccentric cam 60 has the first state facing each other with hall sensor 68, and and hall sensing The second state that device 68 mutually staggers.When magnetic part 72, which has, is in first state with hall sensor 68, sensing unit production Raw induced signal；The second state is in hall sensor 68 when magnetic part 72 has, induced signal disappears.In the present embodiment, Control unit is arranged to pcb board, and secondary motor 56 is stopped once pcb board receives induced signal caused by sensing unit Control.

Shown in reference picture 12, the operation of the payingoff mechanism in the course of work of grass-mowing machine 100 of the present embodiment is described below Journey.Start main switch 27, make drum 32 and the synchronous rotary of holding seat 28, it is electric on pcb board；Start unwrapping wire electronic switch 40, secondary horse It is poor up to the motion of 56 rotation driving drums 32 and the generation of holding seat 28 rotary speed, when the eccentric cam 60 driven by secondary motor 56 revolves Go to 0.5 week, that is to say, that from the rotation of secondary motor 56, delay eccentric cam 60 rotates the time of 0.5 week, and pcb board is opened Begin detection induced signal.As control unit is not received by induced signal, i.e., magnetic part 72 with hall sensor 68 still in phase The second state mutually to stagger, control unit do not perform the stopping control to secondary motor 56, and secondary motor 56 continues to keep rotation.Once Pcb board receives induced signal, i.e. magnetic part 72 controls with when being in first state facing each other with hall sensor 68 Unit automatically carries out the control that time motor 56 stops the rotation.

As it was previously stated, no matter whether main switch 27 starts, no matter in running order grass-mowing machine 100 is or off working state, Start the unwrapping wire electronic switch 40 independently of main switch 27, the unwrapping wire of drum 32 can be achieved.Therefore, in the present embodiment, grass-mowing machine The operating process of 100 payingoff mechanisms, it may be selected to start unwrapping wire electronic switch 40, make to produce speed between drum 32 and holding seat 28 Difference；Manual releasing unwrapping wire electronic switch 40, drum 32 recovers to geo-stationary with holding seat 28, so as to realize the unwrapping wire of drum 32.

Figure 13 shows the grass-mowing machine 200 that second embodiment of the invention provides.

Grass-mowing machine 200 has similar structure with first embodiment 100, and difference will be described specifically below, is table State conveniently, identical structure is not repeated using expression is identically numbered.

In the present embodiment, main motor 26 is abreast arranged in casing 25 relatively with time motor 56, that is to say, that main motor The motor drive shaft 56a of the motor drive shaft 36 of row 26 and time motor 56 be arranged in parallel.Certainly, the position of main motor 26 and time motor 56 is not It is limited to cited mode, those skilled in the art can contemplate relative tilt setting.

The second power train between the motor drive shaft 56a and output shaft 58 of secondary motor 56 is reducing gear, and reducing gear includes Planetary wheeling mechanism 66.The second power train being arranged between drum 32 and secondary motor output shaft 58, including it is connected to output shaft 58 Driving member, by driving member drive pivotal part, and by pivotal part drive middleware 74.In the present embodiment, driving member is set The fixed edge cam 60 ' for being coupled to output shaft 58 is set to, pivotal part is arranged to the lever 42 for pivot with pivotal axis 50, The first end 44 of lever 42 is fixedly connected on casing 25, the second end 46 and the edge cam 60 ' of lever by its pivoting axis 50 Cam surface abuts against.The elastic component 52 set on lever 42 between the position at the second end 46 and casing 25.Elastic component 52 Effect abuts against 46 cam surface all the time with edge cam 60 ' of the second end of lever.When secondary motor 56 rotates, the band of output shaft 58 Moved end face cam 60 ' rotates together, due to the construction of the cam surface of edge cam 60 ' itself so that it is overcoming elastic component 52 Moved around pivotal axis 50 at second end 46 of active force activation lever 42.In addition, grass-mowing machine 100 sets limiter 78, work as lever 42 along away from holding seat 28 direction move to abutted with limited part 78 when, lever 42 moves to extreme position in the direction.Only There is startup unwrapping wire electronic switch 40 to rotate time motor 56, lever 42 overcomes the active force of the elastic component 52 to drive drum 32 Move and unwrapping wire, so as to reduce the waste for line of beating the grass.

In the present embodiment, lever 42 and the indirect driving circumferential movement of drum 32.The motion of specific driving drum 32 and Construction, and payingoff mechanism is controlled and operated to the unwrapping wire of drum 32 and please participates in first embodiment in the lump.

Figure 14 to Figure 21 shows the grass-mowing machine 300 of third embodiment of the invention.

Grass-mowing machine 300 has similar structure with first embodiment 100, and difference will be described specifically below, is table State conveniently, identical structure is not repeated using expression is identically numbered.

Shown in reference picture 14, in the present embodiment, electric drive is the electromagnet 70 being arranged in casing 25, electromagnet 70 by The control of unwrapping wire electronic switch 40 starts.Electromagnet 70 has the output end 70a extended in parallel with the motor drive shaft 36 of main motor, when putting Line electronic switch 40 closes, and electromagnet 70, which is powered, makes the axial movement in output shaft 70a generations direction as shown in Figure 14 arrows M.When Unwrapping wire electronic switch 40 is disconnected to be closed, and electromagnet 70, which powers off, makes output shaft 70a produce and axial movement in opposite direction shown in arrow M.

The 3rd power train is provided between output end 70a and drum 32.By the 3rd power train, electromagnet 70 drives when being powered Moving-wire disk 32 moves between the first state and a second state.In first state, drum 32 and the synchronous rotary of holding seat 28； Two-state, it is poor that rotary speed is produced between drum 32 and holding seat 28.

In the present embodiment, the axial movement of rotation axis of the drum 32 along moving head 22 is so as in the first state and institute State and switch between the second state.

3rd power train includes being pivotally connected to the tumbler of casing 25, the sliding part 174 driven by tumbler, sliding part 174 driving drums 32 in axial direction move with respect to holding seat 28.In the present embodiment, tumbler be arranged to be with pivotal axis 150 The lever 142 of pivot, its pivoting axis 150 are located at the middle part of lever 142, and the first end 144 of lever 142 is with sliding Part is coupled, and the second end 146 of lever is flexibly connected with electromagnet output end 70a, and in the present embodiment, lever 142 is in bending strip, Pivotal axis 50 is vertical with the rotary shaft 36 of moving head 22, and topology layout is reasonable.

Specifically, setting axially extending through hole 175 on holding seat 28, sliding part 174 partially passes through through hole 175 simultaneously Abutted with drum 32, so as to which sliding part 174 is axially moved drum 32 can be driven to be axially moved.In the present embodiment, sliding part 174 Between lever 142 and moving head 22, therefore, during unwrapping wire, it is not necessary to which lid 30 taps ground, and be in deburring in grass-mowing machine works During state, it is not necessary to the work of grass-mowing machine is interrupted, it is easy to operate.Sliding part 174 is circumferentially fixed with holding seat 28 but is axially moveable Mating.

For the drum 32 being housed in compared to direct drive between holding seat 28 and lid 30, lever 142 passes through sliding part 174 drive the structure of drum 32 simpler indirectly, and without set other fit structures, therefore, this reality on drum 32 The drum annex that in the market is much individually sold can be adapted to by applying the holding seat 28 of the moving head 22 of example, be especially adapted to percussion and put The drum 32 of line, consumer is facilitated to change drum 32.

Shown in reference picture 15, in the course of work of grass-mowing machine 300, it is same with holding seat 28 that sliding part 174 is received the drive of seat 28 Step rotation, if lever 142 directly abuts with sliding part 174 and drives sliding part 174 to be axially moved, lever 142 and sliding part Abrasion is very big caused by friction between 174, can substantially reduce the life-span of grass-mowing machine 300.To reduce lever 142 and sliding part Abrasion between 174, in the present embodiment, pivoting friction part is provided between lever 142 and sliding part 174.Specifically, sliding part 174 are provided with bearing-surface, and pivoting friction part is bearing 176, and bearing 176 supports on the bearing surface, and lever 142 is connected to bearing Driving bearing 176 is in axial direction moved so as to drive sliding part 174 in axial direction to move on 176 end face.Preferably, axle It is end face bearing to hold 176, and the sliding friction that lever 142 and sliding part 174 directly contact can be changed into both by the end face bearing Between rolling friction, so as to greatly reduce frictional force so that reduce abrasion.

In the present embodiment, bearing 176 is set on sliding part 174 and matched somebody with somebody with the pine of sliding part 174, thus, is matched somebody with somebody according to pine Degree, bearing 176 can not also can rotate, lever 142 when bearing 176 does not rotate with passing sliding part 174 with sliding part 174 Friction between bearing 176 is smaller, can further improve the life-span of grass-mowing machine 300.

Further to reduce friction, it may occur to persons skilled in the art that, it can be supported in lever 142 and the end face of bearing 176 The second end 146 connect sets rolling member, such as ball, roller, can reduce the friction of lever 142 and the end face of bearing 176, so as to Further improve the service life of grass-mowing machine 300.

The present embodiment is preferable, and the second end 146 of lever 142 is in fork shape, and two of fork is symmetrically set with respect to bearing 176 Put, lever 142 is evenly reasonable to the force of bearing 176.

It may occur to persons skilled in the art that the second end 146 of lever 142 is other shapes, such as simple strip；Or Second end 146 of lever 142 is not provided with rolling member and also may be used.It is all to be covered at this using the technical scheme similar with the present embodiment In the protection domain of invention.

The driving drum 32 under the effect of unwrapping wire electronic switch 40 of lever 142 overcomes the active force and holding seat of bias piece 154 28 depart from.When unwrapping wire electronic switch 40 discharges, electromagnet 70 powers off, output end 70a produce with it is in opposite direction shown in arrow M It is axially moved, while drum 32 returns back to and the clamping of holding seat 28, in the Recovery Process of drum 32, meeting under the effect of bias piece 154 Sliding part 174 is driven to be moved along the direction away from holding seat 28.Sliding part 174 is prevented to limit the range of movement of sliding part 174 Depart from holding seat 28, the locating part that can be abutted with the one end of sliding part 174 away from holding seat 28 is additionally provided with grass-mowing machine 300 178.In the present embodiment, the close-fitting of rotary shaft 36 of locating part 178 and moving head 22 simultaneously has the first limit perpendicular to rotary shaft 36 Plane 80, first confined planes 80 can limit slippage part 174 towards away from holding seat 28 direction range of movement, so as to ensure The connection of sliding part 174 and holding seat 28.Preferably, being additionally provided with locating part 178 can be with bearing 176 away from holding seat 28 End face abuts the second confined planes 82, and second confined planes 82 can limit bearing 176 along away from holding seat 28 when being abutted with bearing 176 Direction range of movement.In the present embodiment, due to the one end of sliding part 174 away from holding seat 28 with respect to bearing 176 away from receipts One end of holder 28 is farther away from holding seat 28, therefore, the second confined planes 82 perpendicular to moving head 22 rotary shaft 36, and relatively First confined planes 80 are close to holding seat 28.Thus, in the present embodiment, a locating part 178 while limit slippage part 174 and bearing 176 range of movement, it is simple in construction and rationally distributed.

Shown in Figure 16, drum 32 is provided with least one raised 184 on the end face of holding seat 28, and drum 32 is close to lid At least one projection 190 is provided with the end face of son 30, described at least one raised 184 and at least one projection 190 exist It is oppositely arranged in the axial direction of drum 32, holding seat 28 is provided with least two circumferentially distributed stopper sections 186, and lid 30 is provided with Circumferentially distributed at least one retainer 192, retainer 192 and stopper section 186 stagger setting in the circumferential, drum 32 is positioned at the During one state, described at least one raised 184 with least two stopper section 186 in a clamping, or, it is described at least One projection 190 and at least one clamping of retainer 192.When projection 184 is with 186 clamping of stopper section, drum 32 is with housing 28 synchronous rotaries of seat are in first state.Projection 190 and the clamping of retainer 192, drum 32 and the synchronous rotary of lid 30, and lid 30 all the time in the synchronous rotary of holding seat 28, and thus, also synchronous rotary is in first state to drum 32 with holding seat 28.It is no matter raised How to change with the number of stopper section, at first position, a projection and a stopper section clamping.Accordingly, regardless of projection How to change with the number of retainer, in the 3rd position, a projection and a retainer clamping.

Thus, in the axial movement of drum 32, adjacent two are stopped in the projection 184 and holding seat 28 on drum 32 During stopper 186 contacts, the stopping between two stopper sections 186 in the meeting of projection 190 and lid 30 on drum 32 Dynamic portion 192 abuts, and so as to avoid the long-time of drum 32 from being disconnected with holding seat 28 and lid 30, realizes putting for length-controllable Line, ensure that grass-mowing machine 300 reliably works.

In the normal work of grass-mowing machine 300, drum 32 is maintained at first state and first position under the effect of bias piece 154, Now for drum 32 with the clamping of holding seat 28 and with the synchronous rotary of holding seat 28, the line of beating the grass being wrapped on drum 32 stretches out holding seat Cut the grass on a lawn outside 28.

When line 34 of beating the grass wear do not reach to a certain extent it is desired beat the grass radius when, operator can pass through payingoff mechanism Drive the unwrapping wire of drum 32.Specifically, operator starts unwrapping wire electronic switch 40, electromagnet 70 is powered, and output end 70a is axially moved Activation lever 142 rotates, and the first end 144 of lever 142 pivots around pivotal axis 150 towards the direction away from holding seat 28, first end 144 pivot the direction pivot that will drive the end 146 of lever 142 second towards close holding seat 28, and the second end 146 is towards close to holding seat 28 Direction athletic meeting push bearing 176, sliding part 174, drum 32, drum 32 is progressivelyed reach second as shown in figure 17 Put, now, the projection 184 on drum 32 departs from the stopper section 186 on holding seat 28, and the projection 190 on drum 32 with Retainer 192 on lid 30 is not yet abutted, and speed difference is produced between drum 32 and holding seat 28, and drum 32 is located at the second shape State, the centrifugal force of the line 34 of beating the grass wound on drum 32 can pull it to throw away a part, i.e., longer line of beating the grass from drum 32 34 free ends are stretched out outside holding seat 28, grass-mowing machine 300 is had bigger radius of beating the grass.

Behind the second place for reaching as shown in figure 17, drum 32 continues under the effect of lever 142 away from along away from collecting The direction motion of seat 28, until drum 32 reaches the 3rd position as shown in figure 18, now, drum 32 is again at the first shape State, the projection 190 on drum 32 abuts with the retainer 192 on lid 30, due to lid 30 and the clamping of holding seat 28, drum 32 Again with the synchronous rotary of holding seat 28, beating the grass line and beaten the grass again with normal rotary speed on drum 32 is wrapped in.

When reaching three position as shown in figure 18, lever 142 is depressed into extreme position, and bias piece 154 is also compressed to The limit, bias piece 154, which has, promotes drum 32 towards the trend moved close to the direction of holding seat 28, now, if release unwrapping wire Electronic switch 40, electromagnet output end 70a counter motion make lever 142 no longer by 174 times bearing 176, sliding part line balls Disk 32, drum 32 depart from lid 30 in the effect of bias piece 154 and moved towards holding seat 28, reach the 4th shown in Figure 19 Position, now, the projection 190 on drum 32 depart from the retainer 192 on lid 30, moreover, the projection 184 on drum 32 with Stopper section 186 on holding seat 28 not yet abuts, and drum 32 is again at the second state, drum 32 and lid 30 and holding seat 28 Between produce that rotary speed is poor again, the line 34 of beating the grass being wrapped on drum 32 throws away one section again and unwrapping wire.

Drum 32 continues the direction motion towards holding seat 28, progressivelyes reach the 5th position as shown in figure 20, drum 32 Be again at first state, now, projection 184 and next stopper section 186 abut, drum 32 and the clamping of holding seat 28 and again Synchronous rotary with normal rotary speed so as to be beaten the grass.

The operating process of the payingoff mechanism of the grass-mowing machine 300 of the present embodiment is described below.Start unwrapping wire electronic switch 40, make Electromagnet 70 drives and produces speed difference between drum 32 and holding seat 28；Manual releasing unwrapping wire electronic switch 40, drum 32 is with receiving Holder 28 recovers to geo-stationary, so as to realize the unwrapping wire of drum 32.The present embodiment only switchs 40 1 elements by unwrapping wire and controlled The energization and disconnection of electromagnet, simplify structure, easy to operate, reduce further cost.

The payoff operation of another selectively payingoff mechanism, first starts main switch 27 before starting unwrapping wire electronic switch 40, Make drum 32 and the synchronous rotary of holding seat 28；Start unwrapping wire electronic switch 40, electromagnet 70 is driven the motion of drum 32 and is housed It is poor that seat 28 produces rotary speed；Unwrapping wire electronic switch 40 is discharged, drum 32 recovers synchronous rotary with holding seat 28；So as to realize line The unwrapping wire of disk 32.

In the fourth embodiment of grass-mowing machine of the present invention, the structure of moving head is used with first embodiment similar structures, different Part is that grass-mowing machine eliminates driving drum with respect to the electric drive and its transmission device that holding seat moves.Sliding block, which is matched somebody with somebody, to be reseted It is disposed adjacent to one end of bias piece so that when speed reduces on moving head direction of rotation, sliding block coordinates bias piece driving drum phase Speed difference is produced to holding seat.Drum, which is in when producing the second state of speed difference with holding seat, radially to be rotated.

For reference picture 21 to Figure 23, the control device of fourth embodiment includes the control circuit being electrically connected with main motor 26, Control circuit is used to control main motor 26 to change between normal operating rate and payingoff speed.Control circuit preferably uses PWM circuit E1.

Reference picture 21, power supply P are powered to main switch K1, and main switch K1 and main motor M is electrically connected with.PWM circuit E1 Including unwrapping wire electronic switch K2.PWM circuit is motor control technique known to industry, is not repeated herein.

Reference picture 22, grass-mowing machine is normally cut under working condition, closes main switch K1, starts main motor M rotations, main motor M rotary shaft drives drum 32 and the synchronous rotary of holding seat 28.

Reference picture 23, when grass-mowing machine needs unwrapping wire in cutting process because of abrasion, unwrapping wire electronic switch K2 is closed, this When main motor M rotary speed controlled by PWM circuit E1, and main motor M rotating speeds V is produced change, centrifuged in sliding block Speed difference rotation is produced in the presence of power, between drum 32 and holding seat 28.

Main motor M running speed V includes working speed V0 and unwrapping wire rotating speed V1.In present embodiment, unwrapping wire rotating speed V1 is less than working speed V0.

Reference picture 24, main motor M running speed V is illustrated with time T change procedure.Under normal operative condition, beat The main motor M of careless machine working speed V0 is between 5000 to 10000 revs/min, it is preferred to use working speed V0 for 8500 turns/ Point.The unwrapping wire rotating speed V1 of the present embodiment is less than working speed V0, thus unwrapping wire rotating speed V1 be arranged on 0 to 3500 between rev/min it Between, it is preferred to use unwrapping wire rotating speed V1 be 3000 revs/min.On time shaft T, wherein within the t1 periods, main motor M operating Speed is reduced to unwrapping wire rotating speed V1 by working speed V0, and the t1 periods are less than 1 second；Unwrapping wire rotating speed V1 maintains t2 periods, the t2 Period is in 0.2 to 2 second；Within the t3 periods, main motor M running speed is recovered to working speed by unwrapping wire rotating speed V1 V0, the t3 periods are similarly less than 1 second.

In 5th embodiment of grass-mowing machine of the present invention, the structure of moving head is used with first embodiment similar structures, different Part is that grass-mowing machine eliminates driving drum with respect to the electric drive and its transmission device that holding seat moves.Sliding block, which is matched somebody with somebody, to be reseted It is disposed away from one end of bias piece so that for moving head when speedup on its direction of rotation, sliding block coordinates bias piece driving drum phase Speed difference is produced to holding seat.Drum, which is in when producing the second state of speed difference with holding seat, radially to be rotated.

Reference picture 21 to Figure 23, and Figure 25, the control device of the 5th embodiment includes what is be electrically connected with main motor 26 Control circuit, the control circuit are used to control rotation speed change during the main operating of motor 26.Control circuit uses PWM circuit. Unwrapping wire rotating speed V1 is more than working speed V0 unlike fourth embodiment.Main motor M running speed V with time T change During, wherein within the t1 periods, main motor M running speed is upgraded to unwrapping wire rotating speed V1 by working speed V0, the t1 times Section is less than 1 second；Unwrapping wire rotating speed V1 maintains the t2 periods, and the t2 periods are in 0.2 to 2 second；Within the t3 periods, main motor M Running speed recovered by unwrapping wire rotating speed V1 to working speed V0, the t3 periods are similarly less than 1 second.Same fourth embodiment, it is main Motor M working speed V0 is between 5000 to 10000 revs/min, it is preferred to use working speed V0 be 8500 revs/min.This reality The unwrapping wire rotating speed V1 for applying example is more than working speed V0, thus unwrapping wire rotating speed V1 be arranged on 11000 to 15000 between rev/min between, It is preferred that the unwrapping wire rotating speed V1 used is 12000 rev/min.

Reference picture 26, the operating process of the payingoff mechanism of the present embodiment four, five is described below.Start main switch K1, make line Disk 32 is with holding seat 28 with operating rate V0 synchronous rotaries；Start unwrapping wire electronic switch K2, main motor M speedups or reduction of speed are extremely V1, makes drum 32 produce speed difference with respect to holding seat 28, and main motor M is held in main horse after preset time period with speedup or reduction of speed V1 Recover to complete unwrapping wire to operating rate V0, drum up to M rotating speeds.The default retention time section of the present embodiment four, five is 0.2 to 2 Second.

Reference picture 27 is to Figure 30, in the sixth embodiment of grass-mowing machine of the present invention, the same fourth embodiment of grass mowing head structure, herein Do not repeat.Control device includes the control circuit being electrically connected with main motor 26, and the control circuit is used to control main motor 26 Rotation speed change during operating.In present embodiment, unwrapping wire rotating speed V1 is less than working speed V0.Control circuit is preferably opened using brake Powered-down road E2.

Reference picture 27, power supply P are powered to main switch K1, and main switch K1 and main motor M is electrically connected with.Brake switch circuit E2 Including unwrapping wire electronic switch K3, unwrapping wire electronic switch K3 is single-pole double-throw switch (SPDT), and single-pole double-throw switch (SPDT) has a NC end and one Individual NO ends, NC ends and a NO end are selectively in the close position.

Reference picture 28, in grass-mowing machine normal work, unwrapping wire electronic switch NC ends are in the close position, and main switch K1 mono- is closed Close, main motor M full speed runnings.

Reference picture 29, during unwrapping wire, unwrapping wire electronic switch NC ends are opened, and NO ends are in the close position, main motor M short circuits, main Motor M rotating speeds are down to zero.

Figure 28 is referred again to, release unwrapping wire electronic switch NO ends, unwrapping wire electronic switch NC ends are in the close position, main motor M Recover full speed running.

Shown in reference picture 30, main motor M running speed V is illustrated with time T change procedure.Normal operative condition Under, the main motor M of grass-mowing machine working speed V0 is between 5000 to 10000 revs/min, it is preferred to use working speed V0 be 8500 revs/min.Unwrapping wire rotating speed V1 is 0 rev/min, that is to say, that main motor M payingoff speed V1 is reduced to zero.In time shaft T On, wherein within the t1 periods, main motor M running speed is reduced to zero by working speed V0, and the t1 periods are less than 1 second；Zero Rotating speed maintains the t2 periods, and the t2 periods are not fixed, and is put since it is desired that being closed behind operator release unwrapping wire electronic switch NO ends Line electronic switch NC ends；Within the t3 periods, main motor M running speed is recovered extremely by zero after the closure of unwrapping wire electronic switch NC ends Working speed V0, the t3 periods are similarly less than 1 second.

The operating process of the payingoff mechanism of the present embodiment six is described below.Start main switch K1, make drum 32 and holding seat 28 synchronous rotaries；Unwrapping wire electronic switch NO ends are closed, main motor M reductions of speed to zero, speed are produced between drum 32 and holding seat 28 Difference；Unwrapping wire electronic switch NO ends, closure unwrapping wire electronic switch NC ends are discharged, main motor rotary speed recovers, and drum recovers with holding seat Synchronous rotary.

Grass-mowing machine of the present invention implements four to six payoff operations disclosed different from embodiment above, is all in normal work Middle carry out unwrapping wire, that is to say, that while cutting work is not interrupted, selection, which starts unwrapping wire electronic switch, can carry out unwrapping wire, It is easy to operate, it is simple in construction, reliably.

Figure 31 to 35 shows the grass-mowing machine 400 that seventh embodiment of the invention provides.

Grass-mowing machine 400 has similar structure with the grass-mowing machine 100 of first embodiment, and difference will be made specifically to retouch below State, convenient for statement, identical structure uses and is identically numbered expression.

It is identical with first embodiment as shown in Figure 31 and Figure 32, match somebody with somebody on holding seat 28 and be connected to lid 30, holding seat 28 and lid Drum 32 is provided with the inner chamber that son 30 is formed.Sliding block 33, sliding block 33 and holding seat 28 are provided between holding seat 28 and drum 32 Circumferentially fixed and radially-displaceable mating, in addition, sliding block 33 is identical with first embodiment with the docked mode of drum 32, no longer in detail Carefully repeat.

In the present embodiment, when the main switch main motor 26 of control (not shown) rotates, drum 32 is in first state, now Drum 32 is static relative to holding seat 28, i.e., with the synchronous rotary of holding seat 28, now grass-mowing machine 400 can not unwrapping wire.And the second shape During state, unwrapping wire electronic switch control drum 32 (not shown) and the relative motion of holding seat 28 are so that between drum 32 and holding seat 28 Produce relative speed difference.So as to realize unwrapping wire.Therefore, the grass-mowing machine 400 passes through the unwrapping wire electronic switch control independently of main switch The unwrapping wire of drum 32 processed, and not unwrapping wire during operation main switch progress switching on and shutting down, operation unwrapping wire electronic cutting is actually needed so as to basis Put row unwrapping wire into, avoid the waste of each switching on and shutting down all unwrapping wire, further reduce the loss for line of beating the grass

Specifically, payingoff mechanism also includes being movably arranged at the stop device 401 of holding seat 28, stop device 401 has the In transfer process between one position and the second place, wherein first position and the second place, sliding block 33 is relative to holding seat 28 Move radially, so that drum 32 and the relative motion of holding seat 28.So as to produce relative speed difference between drum 32 and holding seat 28. And then realize unwrapping wire.

Further, when stop device 401 is in first position, stop device 401 limits sliding block 33 relative to holding seat 28 move radially, so that drum 32 keeps geo-stationary with holding seat 28, can not carry out unwrapping wire.At stop device 401 When the second place, sliding block 33 is radially movable relative to holding seat 28.Sliding block 33 can relative to moving radially for holding seat 28 Promote drum 32 to be turned an angle relative to holding seat 28, relative speed difference is produced between drum 32 and holding seat 28, carry out Unwrapping wire.

Stop device 401 includes pivoting the stop part 403 located at holding seat 28, when stop part 403 is in first position, only The backstop sliding block 33 of block piece 403 is to limit the moving radially relative to holding seat 28 of sliding block 33, so that drum 32 is relative to collecting Seat 28 is static, can not carry out unwrapping wire.When stop part 403 is switched to the second place, sliding block 33 can be moved radially relative to holding seat 28 It is dynamic, so as to promote drum 32 to be turned an angle relative to holding seat 28, realize unwrapping wire.

Preferably, the pivot axis of stop part 403 is overlapping with the axis that holding seat 28 rotates.In this way, unwrapping wire can make it that Compact-sized, the small volume of grass-mowing machine 400 of mechanism.Certainly, the axle that the pivot axis of stop part 403 rotates with holding seat 28 Line can also be arranged to it is not overlapping, preferably, it can be provided be parallel to each other.

It is identical with first embodiment, bias piece 54 is provided between holding seat 28 and sliding block 33, bias piece 54 is to sliding block 33 Force makes projecting teeth holding (not shown) be abutted with sagittal plane (not shown).

Stop device 401 is also included located at the resetting means 405 between stop part 403 and holding seat 28, resetting means 405 Stop part 403 is promoted to recover from the second place to first position.In the present embodiment, resetting means 405 is arranged to stage clip 405.When So, resetting means 405 is it can also be provided that other elastic devices such as extension spring, torsion spring.

As shown in Figure 32 and Figure 33, specifically, stop part 403 has stopper protrusion 407 and installation portion 409, sliding block 33 has The second end 413 for having the first end 411 for the peripheral part that can be extended out holding seat 28 and being oppositely arranged with first end 411, And the second end 413 is located within the peripheral part of holding seat 28.Bias piece 54 is located between holding seat 28 and the second end 413. Sliding block 33 also has hollow bulb 415 and butting section 417, hollow bulb 415 between first end 411 and the second end 413, and Butting section 417 extends from the second end 413 to the pivot of holding seat 28.

In addition, one end of stage clip 405 is arranged on installation portion 409, and the other end of stage clip 405 is resisted against holding seat 28, Stage clip 405 is opposite to the force direction of stop part 407 and the direction of rotation of holding seat.

When being in first position under active force of the stop part 403 in stage clip 405, stopper protrusion 407 is supported with sliding block 33 Relying part 417 abuts against.When stop part 403 is switched to the second place from first position, stopper protrusion 407 overcomes stage clip 405 The butting section 417 of active force and sliding block 33 is separated, so as to sliding block 33 in the presence of bias piece 54 relative to the footpath of holding seat 28 To movement, sliding block 33 is set to be moved to the direction for extending holding seat 28, so as to promote drum 32 (referring to Figure 32) relative to collecting Seat 28 turns an angle, and realizes unwrapping wire.

As shown in figure 33, when grass-mowing machine 400 is in off working state, stop part 403 is under the active force of stage clip 405 The first position that limitation sliding block 33 moves radially relative to holding seat 28.And now in the presence of the active force of bias piece 54, The butting section 417 of sliding block 33 keeps the stopper protrusion 407 with stop part 403 to abut against.

As shown in figure 34, start main switch, now stop part 403 in the presence of stage clip 405 still in limitation sliding block 33 The first position moved radially relative to holding seat 28.When sliding block 33 rotates with holding seat 28, centrifugal force can be produced to sliding block 33, And it is opposite to the force direction of sliding block with bias piece 54 now to centrifuge force direction.Therefore, sliding block 33 is under the influence of centrifugal force gram The active force of bias piece 54 is taken, the rotation axis away from holding seat 28, there is certain interval between stop part 403.But backstop The limitation sliding block 33 of part 403 moving radially to the direction for the peripheral part for extending holding seat 28 relative to holding seat 28.Make line Disk 32 (referring to Figure 32) keeps geo-stationary with holding seat 28, and grass-mowing machine 400 can not carry out unwrapping wire.So as to avoid line of beating the grass Loss.

As shown in figure 35, when starting unwrapping wire electronic switch (not shown), because the rotating speed of holding seat 28 quickly reduces, receipts are made Holder 28 has certain acceleration, and the rotation direction of acceleration direction and holding seat 28 is on the contrary, now because stop part 403 has The inertia having the tendency of can make stop part 403 have the original motion state of holding, that is to say, that stop part 403 has certain inertia Power, and can be rotated in the presence of inertia force towards the opposite direction of acceleration.Specifically, the rotating speed of holding seat 28 quickly reduces While, the inertia force of stop part 403 is more than the active force of stage clip 405, so that stop part 403 is in the presence of inertia force Overcome the active force of stage clip 405, the second place is switched to from first position relative to holding seat 28.Now, stop part 403 only Gear projection 407 and the butting section 417 of sliding block 33 are separated, due to the backstop without stop part 403, simultaneously as holding seat 28 rotating speed substantially reduces, and the centrifugal force of sliding block 33 is less than the active force of bias piece 54, therefore, work of the sliding block 33 in bias piece 54 Overcome centrifugal force to be moved radially relative to holding seat 28 under, and sliding block 33 is moved to the direction for extending holding seat 28, from And promote drum 32 (referring to Figure 32) to be turned an angle relative to holding seat 28, realize unwrapping wire.In this way, it can select as needed Start unwrapping wire electronic switch to carry out unwrapping wire, avoid the waste for line of beating the grass.

Referring back to Figure 34, when discharging unwrapping wire electronic switch, because the rotating speed of holding seat 28 quickly increases, the centrifugation of sliding block 33 Power is more than the active force of bias piece 54.Now sliding block 33 overcomes the active force of bias piece 54 under the influence of centrifugal force, relative to The direction of holding seat 28 to the peripheral part of retraction holding seat 28 moves radially, so as to promote drum 32 to be rotated relative to holding seat 28 Certain angle, make to produce speed difference between drum 32 and holding seat 28, realize unwrapping wire.Wherein, sliding block 33 move radially how Promote drum to be moved relative to holding seat 28 identical with first embodiment, be no longer described in detail.

In addition, during release unwrapping wire electronic switch, because the rotating speed of holding seat 28 quickly increases, have holding seat 28 certain Acceleration, the direction of this brief acceleration are the rotation direction of holding seat 28, and the direction of the inertia force of sliding block 33 and above-mentioned acceleration That spends is in opposite direction.Therefore, now stop part 403 is switched in the presence of its inertia and resetting means 405 from the second place First position, now the holding of butting section 417 of sliding block 33 and the stopper protrusion 407 of stop part 403 abut against.So as to limit sliding block 33 moving radially relative to holding seat 28, now grass-mowing machine 400 be in normal operating conditions.

To sum up, it can select to start unwrapping wire electronic switch as needed to carry out unwrapping wire, avoid the waste for line of beating the grass.Separately Outside, unwrapping wire can be also carried out when discharging unwrapping wire electronic switch, so as to improve unwrapping wire efficiency.

Referring back to Figure 33, when operation main switch shuts down to grass-mowing machine 400, the centrifugal force of sliding block 33 disappears, sliding block 33 in the presence of the active force of bias piece 54, by stop part after moving radially certain distance to the direction away from bias piece 54 403 backstops.Meanwhile when being shut down, because the inertia force of stop part 403 is not enough to overcome the active force of stage clip 405, therefore Stop part 403 is held in first position in the presence of stage clip 405, and now the butting section 417 of sliding block 33 is kept and stop part 403 Stopper protrusion 407 abut against.So as to limit the moving radially relative to holding seat 28 of sliding block 33, now grass-mowing machine 400 can not Carry out unwrapping wire.Therefore when operation main switch shuts down to grass-mowing machine 400, unwrapping wire can not be carried out, avoids the damage for line of beating the grass Consumption.

Figure 36 to 38 shows the grass-mowing machine that eighth embodiment of the invention provides.

The grass-mowing machine has similar structure with the grass-mowing machine 400 of the 7th embodiment, and difference is in payingoff mechanism Stop device, it will be described specifically below, convenient for statement, identical structure uses and is identically numbered expression.

As shown in figure 36, match somebody with somebody to be connected in lid 30, the inner chamber that holding seat 28 is formed with lid 30 on holding seat 28 and be provided with line Disk 32.Be provided with sliding block 33 between holding seat 28 and drum 32, sliding block 33 with holding seat 28 is circumferentially fixed and radially-displaceable matches somebody with somebody Connect, bias piece 54 is provided between sliding block 33 and holding seat 28.

It is identical with the 7th embodiment, in the present embodiment, when the main switch main motor 26 of control (not shown) rotates, drum 32 In first state, now drum 32 is static relative to holding seat 28, i.e., with the synchronous rotary of holding seat 28, now grass-mowing machine 400 Can not unwrapping wire.And during the second state, unwrapping wire electronic switch control drum 32 (not shown) is with the relative motion of holding seat 28 so that line Relative speed difference is produced between disk 32 and holding seat 28.So as to realize unwrapping wire.

Stop device 420 includes pivoting the stop part 422 located at holding seat 28, when stop part 422 is in first position, only The backstop sliding block 33 of block piece 422 is to limit the moving radially relative to holding seat 28 of sliding block 33, so that drum 32 is relative to collecting Seat 28 is static, can not carry out unwrapping wire.When stop part 422 is switched to the second place, sliding block 33 can be moved radially relative to holding seat 28 It is dynamic, so as to promote drum 32 to be turned an angle relative to holding seat 28, realize unwrapping wire.

In the present embodiment, the axis that the pivot axis of stop part 422 rotates with holding seat 28 is parallel to each other.

As shown in Figure 36 to Figure 38, specifically, stop part 422 has stopper protrusion 424, sliding block 33 has butting section 426. When stop part 422 is in first position, the stopper protrusion 424 of stop part 422 leans with the butting section 426 of sliding block 33, backstop The backstop sliding block 33 of part 422 is to limit the moving radially relative to holding seat 28 of sliding block 33.When stop part 422 is in the second place When, the stopper protrusion 424 of stop part 422 disengages with the phase of butting section 426 of sliding block 33, and sliding block 33 can be radially relative to holding seat 28 It is mobile.

As shown in figure 37, when grass-mowing machine 400 is in off working state, in the presence of the active force of bias piece 54, sliding block 33 butting section 426 keeps the stopper protrusion 424 with stop part 422 to abut against.

As shown in figure 38, main switch is started, stop part 403 keeps synchronous axial system with holding seat 28.Other sliding block 33 is with receipts When holder 28 rotates, centrifugal force can be produced to sliding block 33, and now centrifuges force direction of the force direction with bias piece 54 to sliding block Conversely.Therefore, sliding block 33 overcomes the active force of bias piece 54 under the influence of centrifugal force, the rotation axis away from holding seat 28, There is certain interval between the butting section 426 of sliding block 33 and the stopper protrusion 424 of stop part 422.Now drum 32 is (referring to figure 32) geo-stationary is kept with holding seat 28, grass-mowing machine 400 can not carry out unwrapping wire.So as to avoid the loss for line of beating the grass.

When stop part 422 is in first position, the center of gravity 428 of stop part 422, the rotation of pivot 430 and holding seat Turn center 432 to be generally on same straight line.

As shown in figure 39, when starting unwrapping wire electronic switch (not shown), because the rotating speed of holding seat 28 quickly reduces, receipts are made The acceleration of holder 28 reaches certain value, and the rotation direction of acceleration direction and holding seat 28 is on the contrary, now due to stop part 422 inertia having can make stop part 422 have the tendency of to keep original motion state, that is to say, that stop part 422 has certain Inertia force, and can be rotated in the presence of inertia force towards the opposite direction of acceleration, and stop part 422 is relative to holding seat 28 The angle of rotation is enough to disengage stopper protrusion 424 and the butting section 426 of sliding block 33, so as to which stop part 422 is from first position pivot Go to the second place.Specifically, while the rotating speed of holding seat 28 quickly reduces, stop part 422 relative to holding seat 28 from First position is switched to the second place.Now, the stopper protrusion 422 of stop part 403 is separated with the butting section 426 of sliding block 33, Due to the backstop without stop part 403, simultaneously as the rotating speed of holding seat 28 substantially reduces, the centrifugal force of sliding block 33 is less than The active force of bias piece 54.Therefore, sliding block 33 overcomes centrifugal force radially to be moved relative to holding seat 28 in the presence of bias piece 54 It is dynamic, and sliding block 33 is moved to the direction for extending holding seat 28, so as to promote drum 32 (referring to Figure 32) relative to holding seat 28 turn an angle, and realize unwrapping wire.In this way, startup unwrapping wire electronic switch can be selected to carry out unwrapping wire as needed, avoid Beat the grass the waste of line.

Referring back to Figure 38, when discharging unwrapping wire electronic switch, because the rotating speed of holding seat 28 quickly increases, the centrifugation of sliding block 33 Power is more than the active force of bias piece 54.Now sliding block 33 overcomes the active force of bias piece 54 under the influence of centrifugal force, relative to The direction of holding seat 28 to the peripheral part of retraction holding seat 28 moves radially, so as to promote drum 32 to be rotated relative to holding seat 28 Certain angle, make to produce speed difference between drum 32 and holding seat 28, realize unwrapping wire.Wherein, sliding block 33 move radially how Promote drum to be moved relative to holding seat 28 identical with first embodiment, be no longer described in detail.

In addition, during release unwrapping wire electronic switch, due to the effect of centrifugal force, stop part 422 can be 28 turns relative to holding seat It is dynamic, the center of gravity 428 of stop part 422 is kept maximum distance with the pivot 432 of holding seat 28, now stop part 422 Center of gravity, the pivot 432 of its pivot 430 and holding seat 28, so that stop part 422 is switched to the from the second place One position, now the holding of butting section 426 of sliding block 33 and the stopper protrusion 424 of stop part 422 abut against.So as to limit sliding block 33 Relative to moving radially for holding seat 28, now grass-mowing machine 400 is in normal operating conditions.

To sum up, in the present embodiment, startup unwrapping wire electronic switch can be selected to carry out unwrapping wire as needed, avoid line of beating the grass Waste.In addition, unwrapping wire can be also carried out during release unwrapping wire electronic switch, so as to improve unwrapping wire efficiency.

Referring back to Figure 37, when operation main switch shuts down to grass-mowing machine 400, the centrifugal force of sliding block 33 disappears, sliding block 33 in the presence of the active force of bias piece 54, by stop part after moving radially certain distance to the direction away from bias piece 54 422 backstops.Meanwhile when being shut down, because the inertia force of stop part 422 makes the angle very little of its rotation, it is insufficient to allow only Gear projection 424 departs from butting section 426, therefore now stopper protrusion of the butting section 426 of sliding block 33 still with stop part 422 424 abut against.So as to limit the moving radially relative to holding seat 28 of sliding block 33, now grass-mowing machine 400 can not carry out unwrapping wire.Cause This can not also carry out unwrapping wire, avoid the loss for line of beating the grass when operation main switch shuts down to grass-mowing machine 400.

It may occur to persons skilled in the art that the present invention can also have other implementations, but as long as it is used Technical spirit and the present invention it is same or like seemingly, or it is any based on the variations and alternatives made of the present invention all the present invention's Within protection domain.

Claims (17)

1. a kind of grass-mowing machine, including the extension rod of lengthwise extension, the casing located at described extension rod one end, located at the extension rod Upper and the handle with casing setting spaced apart, the moving head for being connected to the casing, head circumference of beating the grass described in driving Main motor, the main switch of the control main motor rotated about the axis, what the moving head was coupled including holding seat, with holding seat Lid, the drum being arranged between the holding seat and the lid, the drum have and the holding seat geo-stationary First state, it is characterised in that：The grass-mowing machine also includes payingoff mechanism, and the payingoff mechanism is included independently of the main switch Unwrapping wire electronic switch and control device, the unwrapping wire electronic switch operationally electrically controls the control device to make drum In the second state that rotary speed difference can be produced between the holding seat, the control device includes electrically connecting with main motor The control circuit connect, the control circuit are used to control main motor to change between normal operating rate and payingoff speed,

Wherein, when the main switch starts, the control circuit controls the main motor to be in normal operating rate, makes described Drum is in first state；

When the main switch starts and the unwrapping wire electronic switch starts, the control circuit controls the main motor to be in unwrapping wire Speed, the drum is set to be in the second state.

2. grass-mowing machine as claimed in claim 1, it is characterised in that：The control circuit is PWM circuit.

3. grass-mowing machine as claimed in claim 1, it is characterised in that：The payingoff speed is less than operating rate.

4. grass-mowing machine as claimed in claim 1, it is characterised in that：The control circuit is brake switch circuit.

5. grass-mowing machine as claimed in claim 1, it is characterised in that：The payingoff speed is more than operating rate.

6. grass-mowing machine as claimed in claim 1, it is characterised in that：Sliding block is provided between the holding seat and the drum, The sliding block and the circumferentially fixed and radially-displaceable mating of the holding seat, the payingoff mechanism also include being movably arranged at the receipts The stop device of holder, the stop device has first position and the second place, when the stop device is in first position, The stop device limits sliding block the moving radially relative to the holding seat, and the stop device is in the second place When, the sliding block is radially movable relative to the holding seat.

7. grass-mowing machine as claimed in claim 6, it is characterised in that：The stop device includes pivoting located at the holding seat Stop part, during first position, sliding block described in stop part backstop, during the second place, the stop part disengages with the sliding block.

8. grass-mowing machine as claimed in claim 7, it is characterised in that：When starting the unwrapping wire electronic switch, the stop part exists In the presence of inertia force, the second place is switched to from first position relative to the holding seat.

9. grass-mowing machine as claimed in claim 8, it is characterised in that：When discharging the unwrapping wire electronic switch, the stop part from The second place is switched to first position.

10. grass-mowing machine as claimed in claim 7, it is characterised in that：The stop device includes being located at the stop part and receipts Resetting means between holder, the resetting means promote the stop part to recover from the second place to first position.

11. ` grass-mowing machines as claimed in claim 7, it is characterised in that：The pivot axis of the stop part revolves with the holding seat The axis turned is overlapping.

12. grass-mowing machine as claimed in claim 7, it is characterised in that：When starting the main switch, the stop part is in limitation The first position that the sliding block moves radially relative to the holding seat.

13. grass-mowing machine as claimed in claim 1, it is characterised in that：The unwrapping wire electronic switch is single-pole double-throw switch (SPDT), hilted broadsword Commutator is selectively in the first closing position and the second closing position, starts the main switch, makes drum and holding seat Synchronous rotary, now single-pole double-throw switch (SPDT) be in the first closing position；Start single-pole double-throw switch (SPDT), by single-pole double-throw switch (SPDT) from the One closing position is changed to the second closing position, makes to produce speed difference between drum and holding seat；Single-pole double-throw switch (SPDT) is discharged, will Single-pole double-throw switch (SPDT) recovers to the first closing position from the second closing position, makes to produce speed difference between drum and holding seat, in advance If after the time, drum recovers synchronous rotary with holding seat.

14. a kind of line-putting method of grass-mowing machine, grass-mowing machine is as claimed in claim 1, and line-putting method includes following operating procedure：Open Dynamic unwrapping wire electronic switch, makes to produce speed difference between drum and holding seat.

15. the line-putting method of grass-mowing machine as claimed in claim 14, operating procedure further comprises discharging the unwrapping wire electronics Switch.

16. the line-putting method of the grass-mowing machine as described in claim 14 or 15, it is characterised in that start unwrapping wire electronic switch Before, first starting main switch makes main motor driving holding seat and drum synchronous rotary.

17. a kind of line-putting method of grass-mowing machine, grass-mowing machine is as claimed in claim 1, and line-putting method includes following operating procedure：Open Dynamic main switch, makes drum and holding seat synchronous rotary；Start unwrapping wire electronic switch, make to produce speed between drum and holding seat Difference, after preset time, drum recovers synchronous rotary with holding seat.