CN208572752U - Grass trimmer - Google Patents

Abstract

The utility model discloses a kind of grass trimmers, comprising: host, including the mowing element for mowing；Operating device, for being connect for user's operation and with host；Host further include: engine, for driving mowing element to rotate；Chassis, for installing engine；Component is turned up, for adjusting chassis so that chassis is at least subjected to displacement in the up-down direction；Host further include: grass guard, including the gear grass portion for preventing grass cuttings from splashing towards the user being located on rear side of grass trimmer；Wherein, when chassis is adjusted in height-regulating component, the displacement that grass guard occurs in the up-down direction is less than the displacement that chassis occurs in the up-down direction.The utility model is capable of providing a kind of grass trimmer for reducing grass guard abrasion deformation.

Description

Grass trimmer

Technical field

The utility model relates to a kind of motor machines, and in particular to a kind of grass trimmer.

Background technique

Grass trimmer is widely used in as a kind of garden class tool to cut the grass on a lawn, in the fields such as vegetation.It is existing to cut Careless machine generally includes hand-held hay mover and Straddle riding type grass trimmer.In general, grass trimmer includes for preventing grass cuttings towards position The grass guard that user on rear side of grass trimmer is splashed.Current most of grass trimmers install the host shell to grass trimmer, chassis or Person is adjusted on the height-regulating component of chassis height, this will certainly make when chassis height is adjusted, and grass guard is also with hair Raw upper and lower displacement reduces the service life of grass guard to cause to wear to grass guard.

Utility model content

To solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of reduction grass guard abrasion deformations Grass trimmer.

In order to achieve the above objectives, the utility model adopts the following technical solutions:

A kind of grass trimmer, comprising: host, including the mowing element for mowing；Operating device is used for for user's operation simultaneously It is connect with host；Host further include: engine, for driving mowing element to rotate；Chassis, for installing engine；Height-regulating group Part, for adjusting chassis so that chassis is at least subjected to displacement in the up-down direction；Host further include: grass guard, including be used for The gear grass portion for preventing grass cuttings from splashing towards the user being located on rear side of grass trimmer；Wherein, when chassis is adjusted in height-regulating component, The displacement that grass guard occurs in the up-down direction is less than the displacement that chassis occurs in the up-down direction.

Further, when chassis is adjusted in height-regulating component, the displacement that grass guard occurs in the up-down direction is less than The half for the displacement that chassis occurs in the up-down direction.

Further, when chassis is adjusted in height-regulating component, displacement and bottom that grass guard occurs in the up-down direction The ratio for the displacement that disk occurs in the up-down direction is more than or equal to 0.5 and is less than or equal to 0.8.

Further, host further include: walking component, the first driving including traveling wheel and for driving traveling wheel to rotate Axis；It includes: the second drive shaft that component, which is turned up, and driving chassis is mobile；Regulation handle, including for the adjustment portion for user's operation； Link mechanism connects the second drive shaft and regulation handle；Grass guard is installed to the second drive shaft.

Further, the second driving is pivotally connected to traveling wheel, and the axis that the second drive shaft is rotated with traveling wheel is parallel to each other, The dynamic eccentric axis setting of the opposite walking rotation of second driving wheel.

Further, traveling wheel includes: the core wheel positioned at traveling wheel center；The distance between first drive shaft and core wheel are big In the distance between the second drive shaft and core wheel.

Further, traveling wheel is rotated by axis of the first drive shaft；Second drive shaft is installed to traveling wheel, the second drive shaft It is parallel to each other with the first drive shaft, and the second drive shaft is with respect to the first drive shaft eccentric setting.

A kind of grass trimmer, comprising: host, including the mowing element for mowing；Operating device is used for for user's operation simultaneously It is connect with host；Host further include: engine, for driving mowing element to rotate；Chassis, for installing engine；Height-regulating group Part, for adjusting chassis so that chassis is at least subjected to displacement in the up-down direction；Host further include: grass guard, including be used for The gear grass portion for preventing grass cuttings from splashing towards the user being located on rear side of grass trimmer；Wherein, when chassis is adjusted in height-regulating component, Chassis is subjected to displacement in the up-down direction and position is held essentially constant grass guard in the up-down direction at this time.

Further, host further include: walking component, the first driving including traveling wheel and for driving traveling wheel to rotate Axis；Grass guard is installed to the first drive shaft.

Further, host further include: for providing the energy source device in energy source to engine and for installing the energy The host shell of device；Grass guard is installed to host shell.

The utility model has the beneficial effect that the grass guard of the grass trimmer of the utility model is installed to chassis height adjusting When upper and lower displacement change lesser position, to reduce the abrasion of grass guard.

Detailed description of the invention

Fig. 1 is the schematic diagram of the grass trimmer of the first embodiment of the utility model；

Fig. 2 is the plan view of the grass trimmer of the first embodiment of the utility model；

Fig. 3 is the perspective view of the grass trimmer in Fig. 2；

Fig. 4 is the top view of the host of the grass trimmer in Fig. 3, and maintenance storehouse is in closed state；

Fig. 5 is the perspective view of the part-structure of the host in Fig. 4, and maintenance storehouse is in opening-wide state；

Fig. 6 is the plan view in the maintenance storehouse in Fig. 5；

Fig. 7 is the perspective view in the maintenance storehouse in Fig. 5；

Fig. 8 is the explosive view of the part-structure of the host in Fig. 4；

Fig. 9 is the perspective view of the part-structure of the operating device of the grass trimmer in Fig. 2；

Figure 10 is the part-structure perspective view of the operating device of the grass trimmer in Fig. 2；

Figure 11 is the perspective view of the part-structure of the host in Fig. 4；

Figure 12 is the perspective view of the part-structure of the host in Fig. 4；

Figure 13 is the plan view of the part-structure of the host in Fig. 4, and warehouse lid is in close state；

Figure 14 is the plan view of the part-structure of the host in Fig. 4, and warehouse lid is in the open state；

Figure 15 is the perspective view in the battery pack storehouse of the host in Figure 14；

Figure 16 is the perspective view of the part-structure of the host in Fig. 4, and battery pack is in taking-up state；

Figure 17 is the cross-sectional view of the part-structure of the host in Fig. 4, and battery pack is installed to battery pack storehouse；

Figure 18 is the chassis of the host in Fig. 4 and the explosive view of broken straw mulch；

Figure 19 is the chassis of the host in Fig. 4 and the bottom view of broken straw mulch；

Figure 20 is the chassis of the host in Fig. 4 and the partial sectional view of broken straw mulch；

Figure 21 is the perspective view of the part-structure of the host in Fig. 4；

Figure 22 is the explosive view of the part-structure of the host in Fig. 4；

Figure 23 is the perspective view of the part-structure of the grass trimmer in Fig. 2.

Specific embodiment

Motor machine shown in FIG. 1 can be for for indoors or the outdoor motor machine to work, in this implementation In example, for the motor machine specifically by taking grass trimmer 100 as an example, grass trimmer 100 can trim grass for its operating device of user's operation Level ground, vegetation etc..

It should be understood that the motor machine specifically can also be other types of tool, such as all-terrain vehicle, golf Vehicle can also be the power by exporting certain forms to realize the electric tool of its instrumental function, as long as in fact, these works Tool includes that the essentiality content described below in the utility model belongs to the range that the utility model is protected.

It as shown in Figure 1 to Figure 3, include: operating device 11, host 12 as the grass trimmer of first embodiment 100.Operation dress 11 are set for hand-held to operate grass trimmer 100 for user, host 12 includes host shell 121, chassis 122, electric device 123, Operating device 11 and host shell 121, which are constituted, to be rotatablely connected, and electric device 123 includes multiple electrical components.

As shown in Figures 1 to 7, host shell 121 surrounds and is formed with the maintenance storehouse 1211 that can accommodate multiple electrical components.Dimension Repairing storehouse 1211 can be by host shell 121 around being formed, or independently of the warehouse of host shell 121, needs to illustrate It is that maintenance storehouse 1211, service cover 1212 in host 12 etc. can be considered host independently of the shell base part of host shell 121 A part of shell 121.In the present embodiment, maintenance storehouse 1211 is formed with towards extraneous opening, maintenance storehouse 1211 equipped with Service cover 1212 is detachably connected with the opening composition in maintenance storehouse 1211, when service cover 1212 is removed, repairs storehouse 1211 Opening is all opened wide, and when grass trimmer 100 is horizontally arranged to ground, maintenance storehouse 1211 is opening up；When service cover 1212 is covered When firmly repairing storehouse 1211, maintenance storehouse 1211 and service cover 1212 are formed with accommodating chamber, can pass through service cover 1212 and maintenance storehouse The sealing structure of 1211 opening junctions makes the accommodating chamber relative closure, prevents steam, dust etc. from entering accommodating chamber, this implementation It is repaired in example and uses seam allowance connection structure between storehouse 1211 and service cover 1212, it is possible to understand that, it can also be using sealing ring, fan The structures such as palace are sealed it.

It in the present embodiment, is detachably connected between service cover 1212 and host shell 121 by screw composition, to maintenance storehouse When 1211 inner bodies repair and other are operated, knockout screw is needed, service cover 1212 is removed.It will of course be understood that, Service cover 1212 can also be made up of fastener with host shell 121 and be fixedly connected or be flexibly connected by connector composition, For example, being detachably connected by buckling to constitute, it is slidably connected by compositions such as sliding rail sliding slots, or passes through the rotation of the compositions such as hinge Connection, service cover 1212 can rotate or slide relative to host shell 121 at least partly open more to form maintenance storehouse 1211 A maintenance position, so that convenient repair grass trimmer 100.As shown in figure 8, in the present embodiment, service cover 1212 is substantially In U shape, including four edges circle all around, the distance on front and back boundary are about 221 millimeters, and the distance of right boundary is about 247 millimeters, it is formed with hierarchic structure in above-below direction.The shape for repairing storehouse 1211 is similar with service cover 1212 with size, certainly, Service cover 1212 and the geomery in maintenance storehouse 1211 are without being limited thereto, as another optional embodiment, service cover 1212 It is generally rectangular shaped with maintenance storehouse 1211, and service cover 1212 is the planar structure perpendicular to up and down direction.

Grass trimmer 100 further includes for providing the battery pack 1237 of operating power source, and battery pack 1237 is placed in host shell 121 inside the battery pack storehouse formed, and in the present embodiment, maintenance storehouse 1212 is set to battery pack warehouse 1213 and operation fills It sets between 11, more specifically, being set to after battery pack warehouse 1213, before operating device 11.It should be understood that battery pack storehouse Body 1213 can also be set to other rational positions of host 12.

In the present embodiment, maintenance 1211 inner containment of storehouse has: first circuit board 1231 is provided with for driving main motor Driving circuit, wherein main motor is the motor rotated for drive cutting element 125；Second circuit board 1232 is arranged useful In the control circuit of control driving circuit；Tertiary circuit plate 1233 is electrically connected with fuse 1234.It should be understood that for driving The driving circuit of dynamic main motor and the control circuit for controlling driving circuit can be set in same circuit board, such as first Circuit board 1231 is provided with the driving circuit for driving main motor and the control circuit for controlling driving circuit.In addition, with The other function element that can also be in addition to fuse 1234 and motor that tertiary circuit plate 1233 is electrically connected.In the present embodiment First circuit board 1231, second circuit board 1232 and tertiary circuit plate 1233 are arranged in maintenance storehouse 1211, structure row Cloth is compact, saves host inner space and makes ordinary maintenance more convenient.In fact, the also company of accommodating in maintenance storehouse 1211 It connects the 4th circuit board 1235 of capacitor and is provided with for driving the 5th circuit board 1236 from the driving circuit for walking motor, In from motor is walked be motor for driving grass trimmer traveling wheel.

The bulkhead in maintenance storehouse 1211 is also formed with air inlet 1211a and air outlet 1211b, and air-flow is from air inlet 1211a Into, flow through maintenance storehouse 1211 inside then from air outlet 1211b flow out, reach to maintenance storehouse 1211 in each electrical component The purpose to radiate, while can also take away the impurity such as the dust adhered in maintenance storehouse 1211.Air-flow shape in maintenance storehouse 1211 At wind path as shown in Figure 7, from figure 7, it is seen that wind path flows through each circuit board, meanwhile, pass through the air-flow stream of air outlet 1211b Through fuse 1234 and the tertiary circuit plate 1233 being connect with fuse 1234.In the present embodiment, 1211 wind path of storehouse is repaired Setting mainly for capacitor, connecting the 4th circuit board 1235 of capacitor, fuse 1234 and connection fuse 1234 Tertiary circuit plate 1233 radiates, while the wind path being made full use of to radiate other electrical components.Accordingly, it is to be understood that , the wind path that radiates move towards design it is varied, be able to achieve to capacitor, fuse 1234 heat dissipation other forms wind path design Also within the protection scope of the present utility model.

As shown in Figures 1 to 7, chassis 122 and operating device 11, which are constituted, is rotatablely connected, in user's operation grass trimmer 100 The rotation connection can be fixed by locking mechanism so that operating device 11 is fixed with respect to chassis 122.The front end of host shell 121 Top is detachably connected with the first lift unit 1214 composition, the top of the rear end of host shell 121 and 1215 structure of the second lift unit At being detachably connected, the first lift unit 1214 far from operating device 11, the second lift unit 1215 be located at the first lift unit 1214 with Between operating device 11.It should be understood that the position of the opposite operating device 11 of the second lift unit 1215 is not limited to above-mentioned position.With Family can be held the first lift unit 1214 and be lifted up with a hand makes the front end of grass trimmer 100 at least partly be detached from ground, can also Being held the second lift unit 1215 with a hand and be lifted up makes the rear end of grass trimmer 100 at least partly be detached from ground, if user uses Two hands hold the first lift unit 1214 respectively and the second lift unit 1215 is lifted up and entire grass trimmer 100 may make to be detached from ground Face, it is of course also possible to carry out the behaviour such as moving, overturn to grass trimmer 100 by the first lift unit 1214 and the second lift unit 1215 Make.In the present embodiment, the first lift unit 1214 and the second lift unit 1215 are to hold knot independently of host shell 121 Structure constitutes with the front and rear end of host shell 121 be detachably connected respectively, and certainly, the first lift unit 1214 is lifted with second Portion 1215 can also constitute with host shell 121 and be rotatablely connected, so that the first lift unit 1214 and the second lift unit 1215 are relatively main Casing body 121 is rotated with the axis for being parallel to wheel shaft, so that user can operate the first lift unit 1214 more flexiblely With the second lift unit 1215.Also, it is understood that, the first lift unit 1214 and the second lift unit 1215 can also be by main cases Body 121 formation itself, is an integral structure with host shell 121.

Cutting element 125 is axis rotation with pivot center 101 in cutting planes when grass trimmer 100 works, and first lifts Portion 1214 and the second lift unit 1215 are located at the same side of cutting planes, and are located at main case relative to ground cutting element 125 The downside of body 121, and the first lift unit 1214 and the second lift unit 1215 are located at the upside of host shell 121.Further, The orthographic projection of first lift unit 1214 and the second lift unit 1215 in cutting planes is respectively positioned on host shell 121 in cutting planes Within interior orthographic projection, this makes grass trimmer 100 in ground running, and 121 federation of host shell is prior to the first lift unit 1214 Any wall surface perpendicular to cutting planes is touched with the second lift unit 1215.

When grass trimmer 100 is along front end and the vertical wall face contact of ground running to host shell 121, the first lift unit 1214 Horizontal distance between vertical wall surface is greater than 0, this makes host shell 121 touch front barrier prior to the first lift unit 1214 Hinder object, in order to enable 100 overall structure of grass trimmer is more rationally compact, the level between the first lift unit 1214 and vertical wall surface Distance is more than or equal to 99 millimeters and is less than or equal to 131 millimeters, specifically, in the present embodiment, the first lift unit 1214 with it is perpendicular Horizontal distance between straight wall face is about 147 millimeters.In addition, the level between the first lift unit 1214 and the second lift unit 1215 Distance is more than or equal to 564 millimeters and less than or equal to 628 millimeter, which requires the first lift unit 1214 and the second lift Rising cannot be separated by between portion 1215 too closely, so that grass trimmer when user lifts the first lift unit 1214 and the second lift unit 1215 100 be able to maintain do not occur steadily relatively it is significantly crooked, and the horizontal distance upper limit then require the first lift unit 1214 with It cannot be too far apart between second lift unit 1215, the orthographic projection in cutting planes should be included in host shell 121 and cut Within orthographic projection in cutting plane, the first lift unit 1214 and the second lift unit 1215 is prevented to be rebuffed damage, while being also prevented from the One lift unit 1214 and the second lift unit 1215 expand cutting dead angle when grass trimmer 100 is cut.In the present embodiment, the first lift The horizontal distance risen between portion 1214 and the second lift unit 1215 is about 608 millimeters.

Further, the horizontal distance between the front end and pivot center 101 of the first lift unit 1214 be more than or equal to 0 and Less than or equal to 350 millimeters, which reduce the first lift units 1214 for being located at 121 front end of host shell to cut to cutting element 125 There is cutting dead angle in the limitation of range when inhibiting the blocking of cutting element 125 that grass trimmer 100 is caused to cut to a certain extent. Specifically, in the present embodiment, the horizontal distance between 1214 front end of the first lift unit and pivot center 101 is about 330 Millimeter.

As shown in Figures 1 to 8, grass trimmer 100 further includes lighting device 124, and lighting device 124 includes the photograph for illumination Whether bright element 1241 is used to indicate illumination component 1241 for switching on or off the light switch 1242 of illumination component 1241 Luminous illumination indicator elment 1243 and the lighting circuit plate for controlling illumination component 1241 and illuminating indicator elment 1243 1244.In the present embodiment, illumination component 1241 is installed on close to battery pack warehouse 1213 in 100 direction of advance of grass trimmer The left and right sides of host shell 121, when light switch 1242 is triggered, illumination component 1241 is towards 100 side of advance of grass trimmer To front side shine.Indicator elment 1243 is illuminated between illumination component 1241 and operating device 11, while also being located at battery Between packet warehouse 1213 and operating device 11, in fact it should be understood that illumination indicator elment 1243 may be placed in user Positioned at grass trimmer 100 rear side to operate operating device 11 when the visible area that is able to observe that in any rational position.

In the present embodiment, lamp holder 1242a is also formed on light switch 1242, illumination indicator elment 1243 is installed on lamp On seat 1242a, it is fixedly connected with lamp holder 1242a composition.Light switch 1242 is mounted in service cover 1212, in service cover 1212 It is formed with the through-hole 1212a for exposing for light switch 1242 and illumination 1243 part of indicator elment, is indicated by illumination Whether the different colours that element 1243 is showed differentiate illumination component 1241 in luminance.Light switch 1242 and logical Interference fit is constituted between the 1212a of hole, it is possible to understand that, illumination indicator elment 1243 can also be connected to dimension with other types of attachment It builds on 1212.

It is located at maintenance storehouse 1211 for controlling illumination component 1241 and illuminating the lighting circuit plate 1244 of indicator elment 1243 Inside, illumination component 1241 and illumination indicator elment 1243 are electrically connected to lighting circuit plate 1244.Light switch 1242 also wraps Elastic portion 1242b is included, interference fit is constituted between elastic portion 1242b and through-hole 1212a, when pressing down on light switch 1242, Elastic portion 1242b occurs elastic deformation and makes light switch 1242 that downward displacement occur, and triggers on lighting circuit plate 1244 Associated electrical components, so that illumination component 1241 is lit.

It should be understood that the lighting device 124 in the present embodiment can also be applied on other tools, such as snowplough, All-terrain vehicle, golf cart, fork truck etc., the composition of lighting device and position arrangement can use for reference the photograph in the present embodiment Bright device 124, does not repeat excessively herein.

As shown in Figures 1 to 10, grass trimmer 100 includes connecting with host 12, and the operation for user's operation grass trimmer 100 fills Set 11.Operating device 11 includes pushing grass trimmer 100 along the handle 111 of ground running for user, and handle 111 includes holding for user The grip part 1111 held, grip part 1111 include the first grip part 1111a and the second grip part 1111b, the first grip part 1111a Extend along 102 direction of first straight line, the first grip part 1111a and the second grip part 1111b is integral type knot in the present embodiment Structure, certainly, grip part 1111 can also be formed by connecting by independent first grip part 1111a and the second grip part 1111b.Handle 111 further include the connecting rod 1112 for connecting grip part 1111 and host 12, and in the present embodiment, connecting rod 1112 is along perpendicular to the 103 direction of second straight line of one straight line 102 extends.

Operating device 11 further includes that the traveling wheel of control driving grass trimmer 100 realizes walk motor start and stop certainly the from walking One switch 112 and second switch 113, first switch 112 and second switch 113 are each attached to handle 111, more specifically, first Switch 112 and second switch 113 are each attached to grip part 1111.

Operating device 11 further includes the 5th circuit board 1236 for being provided with driving from the driving circuit for walking motor, first switch 112 and second switch 113 be electrically connected to the 5th circuit board 1236, and only work as first switch 112 and the quilt of second switch 113 When triggering, the driving circuit on the 5th circuit board 1236 just be can control from electric motor starting is walked, and grass trimmer 100 could be realized along ground From walking, when this makes that first switch 112 or second switch 113 are accidentally triggered in inoperative, motor is walked certainly It not will start, ensure that the safety of operation.After walking electric motor starting certainly, first switch 112 and second switch 113 therein one A when being released, being no longer on triggering state, control circuit still controls and is maintained at starting state without closing from walking motor, Only when first switch 112 and second switch 113 are both released when being no longer on triggering state, walking motor certainly just can quilt It closes.It should be understood that operating device 11 also may include the first switch 112 that motor start and stop are walked in control certainly, first switch 112 It is electrically connected to the 5th circuit board 1236 for being provided with driving from the driving circuit for walking motor, is triggered twice in first switch 112 When above, driving circuit can just be controlled from electric motor starting is walked, and this also avoids accidental primary triggering startings from motor is walked, and be guaranteed Operational safety.

In the present embodiment, first switch 112 and second switch 113 are installed on grip part 1111, and grip part 1111 is formed There are groove or the hole of installation first switch 112 and second switch 113, it is recessed that first switch 112 and second switch 113 are partially submerged into this In slot or hole, constitutes and be fixedly connected with grip part 1111, it is possible to understand that, first switch 112 and second switch 113 can also connect To 1111 surface of grip part.It is held in addition, first switch 112 and second switch 113 are set to the first grip part 1111a and second The portion junction 1111b, the position that most convenient is held when that is to say user's operation, certainly, first switch 112 and second switch 113 Can also be set to the other positions of operating device 11, the structure of handle 111 be not limited to the present embodiment in structure, first switch 112 and the specific location of second switch 113 can also be set according to the specific structure of handle 111.It should be understood that first switch 112 and the setting of second switch 113 even can be not limited to operating device 11, one of switch can be set to host 12 On, when two switches are triggered from electric motor starting is walked, two switches walk motor certainly when being released and stop working.

Operating device 11 further includes trigger 114 and power switch 115, and trigger 114 and operating device 11, which are constituted, to be rotatablely connected, It can be axis rotation with third straight line 104 relative to handle 111.Trigger 114 and power switch 115 are electrically connected to second circuit board 1232, second circuit board 1232 is provided with the control circuit for controlling driving circuit.When triggering power switch 115 and by trigger 114 pull to when starting position, and control circuit control cutting element 125 starts turning, and triggers power switch 115 and keeps 114 pull rest on starting position can then make cutting element 125 keep rotation.In general, trigger 115 rests on starting position Shi Keyu handle 111 fits, and allows user that trigger 114 is kept to stop while holding handle operation grass trimmer 100 In starting position.In the present embodiment, grip part 1111 is formed with the groove 1111c being recessed inwardly, when trigger 114 pulled to When starting position, trigger 114 is accommodated into groove 1111c, defines trigger 114 relative to grip part 1111 to a certain extent Position so that user hold trigger 114 with it is more convenient laborsaving when grip part 1111.

It should be understood that the operating device 11 in the present embodiment can also be applied on other tools, such as snowplough, entirely Landform vehicle, golf cart, fork truck etc., do not repeat excessively herein.

As shown in Figures 1 to 12, grass trimmer 100 includes the walking component 126 for realizing grass trimmer 100 from walking, walking group Part 126 includes the first drive shaft 1261 for driving traveling wheel with the 4th straight line 105 for axis rotation.Grass trimmer 100 further includes The height-regulating component 127 for enabling chassis 122 to generate upper and lower displacement for adjusting chassis 122, it includes receiving tune that component 127, which is turned up, Save the regulation handle 1271 of power, driving chassis 122 mobile the second drive shaft 1272 and connection regulation handle 1271 and the The link mechanism 1273 of two drive shafts 1272.105 three's phase of first drive shaft 1261, the second drive shaft 1272 and four axistyle It is mutually parallel, and the opposite four axistyle 105 of the second drive shaft 1272 and the first drive shaft 1261 are set for the eccentric.In grass trimmer 100 are in different operating conditions, need to adjust height of the chassis 122 apart from ground according to the actual situation, and user adjusts hand by operation Handle 1271 applies a driving force to grass trimmer 100, which drives bindiny mechanism 1273 to rotate, to drive second to drive Moving axis 1272 and the rotation of chassis 122 are to realize the adjusting to 122 height of chassis.

Host 12 further includes grass guard 128, and when user's operation grass trimmer 100 is normally at 100 rear side of grass trimmer, grass guard 128 for preventing grass cuttings towards splashing on rear side of grass trimmer 100.In general, grass guard 128 can mount to chassis 122 or host Shell 121, but this makes when carrying out height adjustment to chassis 122, and grass guard 128 is also with chassis 122 or host shell 121 move up and down, and generate abrasion with contacts such as ground over time, influence the service performance and service life of grass guard 128.

In the present embodiment, it further includes constituting the connection of rotation connection in traveling wheel center A and traveling wheel that component 127, which is turned up, Part 1274, connector 1274 and the first drive shaft 1261, which are constituted, to be rotatablely connected, and is fixedly connected with the second drive shaft 1272 composition, Connector 1274 and the second drive shaft 1272 are the integral structure that welding is formed, the installation of grass guard 128 to the in the present embodiment Two drive shafts 1272.First drive shaft, 1261 support chassis 122, the rotation connection of chassis 122 to the first drive shaft 1261.It can pass through Distance of the first drive shaft of reasonable set 1261 to traveling wheel center A, the distance of the second drive shaft 1272 to traveling wheel center A, And first drive shaft 1261 to traveling wheel center A distance and the second drive shaft 1272 to traveling wheel center A ratio so that When component 127 is turned up to the progress height adjustment of chassis 122, the second drive shaft 1272 surrounds traveling wheel center with follower link 1274 A rotation, connector 1274 drive chassis 122 to rotate around traveling wheel center A, the position that grass guard 128 occurs in the up-down direction Move the half for being less than the displacement that chassis 122 occurs in the up-down direction.In this embodiment, the first drive shaft 1261 is into traveling wheel The ratio of the distance of heart A and the second drive shaft 1272 to traveling wheel center A are about 1.52, so that component 127 is turned up to chassis 122 When carrying out height adjustment, the upper and lower displacement that grass guard 1272 generates is much smaller than the upper and lower displacement that chassis 122 generates.

In fact, grass guard 128 may also connect to the first drive shaft 1261 or other positions, but component 127 is being turned up To chassis 122 carry out height adjustment when, the position of traveling wheel center A be it is constant, the link position of grass guard 128 preferably more leans on The position of nearly traveling wheel center A, in other words, grass guard 128 is connected to the position of host 12 and the position of traveling wheel center A can With infinitely close to even be overlapped so that position is held essentially constant grass guard 128 in the up-down direction.

As shown in Fig. 1 to Figure 15, host 12 further includes for the energy for walking motor and main motor offer energy source certainly Device, in the present embodiment, it is possible to which source device is battery pack 1237, host shell 121 includes battery pack warehouse 1213, battery pack storehouse Body 1213 is the independent case for being connected to host shell 121, it is possible to understand that, battery pack warehouse 1213 can also be by host shell 121 is integrally formed.Host 12 further includes battery pack warehouse lid 1216, and battery pack warehouse lid 1216 and battery pack warehouse 1213, which are constituted, to be rotated Connection can be axis rotation with the 5th straight line 106.Battery pack warehouse 1213, which opens wide, is formed with its internal window with outside of connection 1217, battery pack warehouse lid 1216 has opening state and closed state relative to window 1217.When battery pack warehouse lid 1216 is opposite In the open state in window 1217, window 1217 is connected to its internal and outside, and battery pack can be from battery pack warehouse 1213 It takes out, that is to say that battery pack is detachably connected with the composition of battery pack warehouse 1213；When battery pack warehouse lid 1216 is relative to window 1217 when being in close state, and battery pack warehouse 1213 and battery pack warehouse lid 1216 constitute substantially closed accommodation space, i.e., electric The storehouse Chi Bao, battery pack are contained in inside battery pack storehouse.

In the present embodiment, service cover 1212 is also formed with card slot 1212b, and battery pack warehouse lid 1216 is formed with hook 1216a, when battery pack warehouse lid 1216 is in close state relative to window 1217, hook 1216a is caught in card slot 1212b and card Slot 1212b constitutes position limiting structure and battery pack warehouse lid 1216 is not rotated relative to battery pack warehouse 1213.It is understood that , the setting position of hook 1216a and card slot 1212b is flexible, and service cover 1212 can be formed with hook 1216a, battery pack warehouse lid 1216 can be formed with card slot 1212b, alternatively, hook 1216a is formed in battery pack warehouse lid 1216, on battery pack warehouse 1213 Form card slot 1212b.In addition, making it be maintained at closing shape with respect to battery pack warehouse 1213 for limiting battery pack warehouse lid 1216 The position limiting structure of state is not limited only to the fit structure of hook 1216 Yu card slot 1212b, can be other dismountable limit knots Structure, such as magnet, locking piece etc..

The position also shape of battery pack warehouse lid 1216 is connected close to battery pack warehouse 1213 in 1213 outer surface of battery pack warehouse At having support battery pack warehouse lid 1216 and battery pack warehouse lid 1216 made to be maintained at the branch of opening state with respect to battery pack warehouse 1213 Support part 1213a.Support portion 1213 actually limits rotational angle of the battery pack warehouse lid 1216 relative to battery pack warehouse 1213, So that battery pack warehouse lid 1216 cannot continue to rotate after turning over certain angle, in the present embodiment, battery pack warehouse lid 1216 is opposite In the rotatable angular range of battery pack warehouse 1213 be about 0 to 65 °, in other words, when battery pack warehouse lid 1216 is supported Portion 1213 supports, and when being kept open, the angle formed between battery pack warehouse lid 1216 and battery pack warehouse 1213 is about 65°.It should be understood that battery pack warehouse lid 1216 relative to the rotatable angle of battery pack warehouse 1213 be greater than 0 ° less than 180 °, The reasonable sets such as the structure of angle and host shell 121 that can be formed according to battery pack warehouse 1213 relative to chassis 122 are situated between Other value ranges between 0 to 180 ° are as battery pack warehouse lid 1216 relative to the rotatable angle model of battery pack warehouse 1213 It encloses.

In the present embodiment, when battery pack warehouse lid 1216 relative to battery pack warehouse 1213 in the open state, can lead to Crossing pushing handle 111 is lifted up host 12 far from one end of handle 111, so that the position of centre of gravity of battery pack warehouse lid 1216 is sent out Raw offset, battery pack warehouse lid 1216 rotate under the effect of gravity, are reset to closed state by opening state, while making hook 1216a is caught in card slot 1212b under the effect of gravity, makes battery pack to eliminate and need to be manually operated battery pack warehouse lid 1216 Warehouse lid 1216, which turns to closed state by opening state and presses down on battery pack warehouse lid 1216, makes hook 1216a be caught in card slot 1212b.In addition, in the present embodiment, since the first lift unit 1214 is set to battery pack warehouse relative to host shell 121 1213 front ends, when battery pack warehouse lid 1216 relative to battery pack warehouse 1213 in the open state, be lifted up first and lift Portion 1214 can also be again such that host 12 be lifted up far from one end of handle 111, so that battery pack warehouse lid 1216 is in weight Closed state is reset to by opening state under power effect, while hook 1216a being made to be caught in card slot 1212b under the effect of gravity.

As shown in Fig. 1 to Figure 17, host shell 121 includes battery pack warehouse 1213, and battery pack warehouse 1213 includes main body Portion, main part is fluted around being formed, and to 121 inner recess of host shell, groove can be and host shell 121 1 groove The body formed absolute construction that is also possible to is connected to host shell 121, battery pack warehouse 1213, and battery pack warehouse 1213 is formed with slotting Entrance is inserted into for battery pack 1237, in the present embodiment, insert port, that is, window 1217.

Battery pack warehouse 1213 and battery pack warehouse lid 1216 are jointly around the battery pack formed for accommodating battery pack 1237 Storehouse.

The knot that guiding battery pack 1237 is bound to host shell 121 along a cartridge insertion direction is also formed with inside battery pack storehouse Conjunction portion 1213b, engaging portion 1213b can be both integrally formed with host shell 121, or absolute construction is connected to battery pack Warehouse 1213 or battery pack warehouse lid 1216, in the present embodiment, engaging portion 1213b is integrally formed with battery pack warehouse 1213 Sliding rail slides into 1213 bottom of battery pack warehouse along sliding rail when battery pack is packed into battery pack warehouse 1213 from top to bottom, certainly, Engaging portion 1213b is also possible to other any structures with displacement guide function.

Host 12 can also include the fixed part of the certain position for being fixed on battery pack 1237 in battery pack storehouse, After battery pack 1237 is inserted into 1213 bottom of battery pack warehouse, battery pack 1237 is made by operation battery pack 1237 or fixed part It is detachably connected with fixed part composition, which can be formed as one or install to battery pack 1237 or host shell 121 buckle, magnetic element etc., it is not limited here.

In the present embodiment, battery pack 1237 is inserted into battery pack warehouse along sliding rail from insert port along direction shown in Figure 16 1213.In the present embodiment, the with respect to the horizontal plane angled inclination of battery pack warehouse 1213, specially from vertical direction It tilts backwards, therefore also relative level plugs at a certain angle to battery pack warehouse 1213 battery pack 1237.Battery pack 1237 Cartridge insertion direction and horizontal plane angle be more than or equal to 30 ° and be less than or equal to 80 °, specifically, the inserting side of battery pack 1237 It is 54 ° to the angle with horizontal plane, in other words, the tilt angle of battery pack warehouse 1213 and sliding rail with respect to the horizontal plane It is 54 °, it will of course be understood that, which may be the other values of range above.

Battery pack 1237 is also formed with the electricity display lamp 1237a for showing electricity, in the inserting of battery pack 1237 to knot When conjunction portion 1213b, electricity display lamp 1237a shines along the cartridge insertion direction.Electricity display lamp 1237a can be set in battery pack Any position on 1237 is arranged in 1237 top surface of battery pack, in the present embodiment, electricity display lamp mostly for convenience of visualizing 1237a is set to the end face center position of battery pack 1237.Battery pack warehouse lid 1216, which is also formed with, is located at battery for user's observation Wrap the visible section 1216b of the display state of the electricity display lamp 1237a in storehouse.Visible section 1216b is using at least partly transparent Material made of hyalomere.In the present embodiment, visible section 1216b uses the plastics of the polishing with translucency certainly can Other translucent materials, such as glass etc. can also be used depending on portion 1216b.Visible section 1216b is installed to battery pack warehouse lid 1216, can To be integrally formed with battery pack warehouse lid 1216, entire battery pack warehouse lid 1216 is hyalomere at this time, is also possible to absolute construction, with The composition of battery pack warehouse lid 1216 is fixedly connected.In the present embodiment, visible section 1216b is that area coverage is less than battery pack warehouse lid 1216 And material is different from the plastic casing of battery pack warehouse lid 1216.Visible section 1216b allows user from battery compartment external observation to electricity Display lamp 1237a is measured, simultaneously because the limitation of its own area limits visual range.

To guarantee that machine is steady, battery pack 1237 is generally mounted to close to the center of 121 left and right directions of host shell, In other words, battery pack 1237, battery pack storehouse and electricity display lamp the 1237a in general split about operating device 11 Symmetrically, trigger 114 is symmetrical about the split.

As shown in figure 17, under conditions of not considering the refraction of light, electricity display lamp 1237a is by the visible section 1216b It is formed on the split after limitation using electricity display lamp 1237a as vertex, using the first boundary and the second boundary as the hair on side Light region, the first boundary and the second boundary are formed by angle more than or equal to 90 ° and are less than or equal to 160 °.It should be noted that Regard the central point of electricity display lamp 1237a as electricity display lamp 1237a at this time, visible section 1216b includes in the longitudinal direction Back and more forwardly of front more posteriorly, the first boundary are to connect electricity display lamp 1237a central point and visible section The ray of the intersection point of the back and split of 1216b, the second boundary are to connect electricity display lamp 1237a central point and visible section The ray of the intersection point in the front and split of 1216b.Specifically, in the present embodiment, the first boundary and the second boundary institute shape At angle be 129 °, even if also saying, at this time the maximum visual range of electricity display lamp 1237a be 129 °, it is of course also possible to be The other values of the above angular range.In addition, the angle of the first boundary and horizontal plane is more than or equal to 5 ° and less than or equal to 15 °, namely Be the visible area relative level of electricity display lamp 1237a inclination angle be more than or equal to 5 ° and be less than or equal to 15 °, specifically, In the present embodiment, which is 8 °.Since user is when operating grass trimmer 100, sight is after electricity display lamp 1237a Top obliquely, therefore battery pack 1237 and electricity display lamp 1237a is sweptback from vertical direction sets in the present embodiment Meter, which can extend one's service, observes the visual range of electricity display lamp 1237a.As shown in Figure 18 to Figure 20, chassis 122(is shown in Fig. 1) also Accommodate cutting element 125(including being used to form and see Fig. 1) cutting room 1221 around wall surface 1222, chassis 122 is also formed There is the Lysimachia sikokiana channel 1223 for weeds to be discharged, Lysimachia sikokiana channel 1223 includes the connecting pin being connected to cutting room 1221 The 1223a and straw outlet 1223b opposite with connecting pin 1223a.Grass trimmer 100 further includes being connected to straw outlet 1223b for receiving Collect the grass catcher for being cut off weeds and the broken grass for closing Lysimachia sikokiana channel 1223 to prevent weeds from being discharged from straw outlet 1223b Lid 1224.

Grass trimmer 100, which has, collects careless mode and broken careless mode；When grass trimmer 100 is in and collects careless mode, straw outlet 1223b Open wide or be connected with grass catcher；When grass trimmer 100 is in broken careless mode, broken straw mulch 1224 is connected to Lysimachia sikokiana channel 1223, Lysimachia sikokiana channel 1223 is closed to prevent weeds from being discharged from straw outlet 1223b.Broken straw mulch 1224 further includes protruding into Lysimachia sikokiana channel The 1223 filled end 1224a that 1223 part of Lysimachia sikokiana channel is filled.Filled end 1224a includes for closing connecting pin The fill surface of 1223a, when broken straw mulch 1224 closes Lysimachia sikokiana channel 1223, fill surface with it is continuous at one around wall surface 1222 Extend in curved surface.

In the present embodiment, Lysimachia sikokiana channel 1223 is formed with step structure 1225 with the junction around wall surface 1222, when When broken straw mulch 1224 closes Lysimachia sikokiana channel 1223, distance about 12 millis are formed between filled end 1224a and step structure 1225 The gap of rice.When cutting element 125 is that axis rotation is cut with pivot center 101, the broken grass cut tends to concentrate on The gap is attached on wall surface 1222.

When broken straw mulch 1224 closes Lysimachia sikokiana channel 1223, broken straw mulch 1224 plugs the portion concave knot of 122 script of chassis Structure, fill surface and constituted around wall surface 1222 Fig. 1 is shown in by pivot center 101() centered on rotary structure 1226, revolution Body structure 1226 is about 101 almost symmetry of pivot center.It should be noted that rotary structure 1226 is filled inside it ignoring Gap, the Lysimachia sikokiana channel 1223 formed between end 1224a and step structure 1225 is formed with the junction for surrounding wall surface 1222 It is about 101 almost symmetry of pivot center under the conditions of thickness of step structure 1225 and filled end 1224a itself etc..

As shown in Figure 21 to Figure 22, for driving being also equipped with from the outer rotor for walking motor for traveling wheel miscellaneous for preventing The grass-winding proof cover 1218 of grass winding.In the present embodiment, grass-winding proof cover 1218 is the shell structure for being provided with multiple tracks air port.Grass-winding proof Cover 1218 is by walking the second of the first cover portion 1218a of the output end of the armature spindle of motor and the input terminal of close armature spindle close to oneself Cover portion 1218b is constituted, and the first cover portion 1218a and the second cover portion 1218b is detachably connected by buckle 1218c composition.

As shown in Fig. 1,9,10,23, operating device 11 includes operating assembly, and operating assembly includes that control main motor rotates Trigger 114, control from walk motor start and stop certainly walk switch, certainly walk switch include first switch 112 and second switch 113, and It adjusts from the speed regulation part for walking motor speed, regulating part is specially to adjust the speed knob 116.Adjust the speed knob 116, first switch 112, second Switch 113 and speed regulation knob 116 are each attached to the grip part 1111 of handle 111, naturally it is also possible to control only with a switch System walks the start and stop of motor certainly.Operating device 11 further includes signal collection device, is in the present embodiment signal circuit board 1238, letter The installation of number circuit board 1238 to operating device 11 inside the accommodation space formed, specifically, installation to handle 111 surrounds Inside the accommodation space of formation.Trigger 114, first switch 112, second switch 113 and speed regulation knob 116 are connected to signal Circuit board 1238 can produce when trigger 114, first switch 112, second switch 113 and speed regulation knob 116 are user-operably Raw electric signal is transferred to signal circuit board 1238.Certainly, signal collection device is also possible to multiple circuit boards or other forms Electric device, this is not restricted, and in the present embodiment, the electric signal of the sending of operating assembly is sent to same signal circuit board 1238 can simplify 100 internal circuit configuration of grass trimmer.It should be noted that the operating assembly being connected with signal circuit board 1238 Being not limited only to trigger 114, first switch 112, second switch 113 and speed regulation knob 116, signal circuit board 1238 can also connect Connect the operating parts of more different function.

As one kind, specifically embodiment, signal collection device may include that unlike signal is collected and is located respectively Multiple signal circuit boards of reason, specifically, including the first signal circuit board being connected with trigger 114；With first switch 112, The connected second signal circuit board of two switches 113；The third signal circuit board being connected with speed regulation knob 116.Have as another kind Body ground embodiment, second signal circuit board and third signal circuit board can synthesize a circuit board.

As another specific embodiment, grass trimmer 100 has Bluetooth control function, and operating device 11 further includes connecing The Bluetooth signal circuit board of Bluetooth signal is received and handles, the receiving that Bluetooth signal circuit board is also housed by the formation of operating device 11 is empty Between it is internal.

Operating device 11 further includes signal wire 1239, signal wire 1239 and signal circuit board 1238, Bluetooth signal circuit board And host 12 is connected and by signal from signal circuit board 1238 or Bluetooth signal board transmission to host 12, specifically, Each circuit board of host 12 is transmitted to realize the control to each function of grass trimmer 100.

Signal wire 1239 includes the core for signal transmission, surrounds the protection pipe 1239a of core, specifically, protection Pipe 1239a is bellows, and the cross section of protection pipe 1239a is circle, and the diameter of the cross section of protection pipe 1239a is more than or equal to 5mm and it is less than or equal to 15mm, in the present embodiment, the diameter of the cross section of protection pipe 1239a is 10mm.

In the present embodiment, host 12 further includes walking motor certainly, for driving for driving grass trimmer 100 to realize from walking The main motor that dynamic cutting element 125 is rotated using pivot center as axis.Correspondingly, host 12 further includes being provided with control main motor to turn The first circuit board 1231 of dynamic control circuit and the 5th circuit board for being provided with the driving circuit for driving oneself to walk motor rotation 1236, signal wire 1239 is connected with first circuit board 1231 and the 5th circuit board 1236, the control signal that operating assembly is issued It is sent to first circuit board 1231 and the 5th circuit board 1236, so that the start and stop of motor and main motor are walked in control certainly, and then is controlled The walking certainly and the cutting of cutting element 125 of grass trimmer 100 processed.It should be noted that signal wire 1239 is not limited only to and One circuit board 1231 is connected with the 5th circuit board 1236, can also be connected with other circuit boards or circuit element, in fact, In the present embodiment, host 12 further includes function circuit board, which is connected with lighting device 124(and sees Fig. 4), battery pack 1237(is shown in Figure 16) etc. function element, signal wire 1239 be additionally coupled to function circuit board.All electricity being connected with signal wire 1239 Road plate, which can send signal to signal wire 1239, also can receive the signal that other circuit boards are sent to signal wire 1239, in turn Selectively received signal is handled.

Host 12 includes the function element such as main motor, movable motor, battery pack 1237, lighting device 124.For having indigo plant The grass trimmer 100 of tooth function, host 12 further include blue-tooth device, and signal collection device further includes fourth signal circuit board, i.e., blue Tooth signal circuit board, Bluetooth signal circuit board are installed to handle 111 inside the accommodation space formed.What blue-tooth device issued Signal is sent to signal receiving device, by the reception and processing of Bluetooth signal circuit board, is transmitted to master by signal wire 1239 Machine 12, thus achieve the purpose that control grass trimmer 100, specifically, Bluetooth signal circuit board can collect from host 12 with And the signal of signal receiving device, the parameters of host 12 are set or is updated and is transmitted to it is connected with function element Each circuit board is to control each function element of host 12, herein, it should be noted that blue-tooth device is only to host 12 Transmission signal does not directly control grass trimmer 100.

In the present embodiment, signal wire 1239 is extended downwardly from the top of handle 111 around connecting rod 1112, is partially fixed on Connecting rod 1112 extends to inside maintenance storehouse 1211, is connected to each circuit board being contained in inside maintenance storehouse 1211.

In addition, the signal circuit board 1238 and 1239 structure of signal wire in the present embodiment can also be used to other motor Tool, such as snowplough, grass-mowing machine etc..

The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation Technical solution obtained, all falls in the protection scope of the utility model.

Claims (10)

1. a kind of grass trimmer, comprising:

Host, including the mowing element for mowing；

Operating device, for being connect for user's operation and with the host；

The host further include:

Engine, for driving the mowing element to rotate；

Chassis, for installing the engine；

Component is turned up, for adjusting the chassis so that chassis is at least subjected to displacement in the up-down direction；

It is characterized by:

The host further include:

Grass guard, including the gear grass portion for preventing grass cuttings from splashing towards the user being located on rear side of the grass trimmer；

Wherein, when the chassis is adjusted in the height-regulating component, displacement that the grass guard occurs in the up-down direction The displacement occurred in the up-down direction less than the chassis.

2. grass trimmer according to claim 1, it is characterised in that:

When the chassis is adjusted in the height-regulating component, the displacement that the grass guard occurs in the up-down direction is less than institute State the half for the displacement that chassis occurs in the up-down direction.

3. grass trimmer according to claim 1, it is characterised in that:

When the chassis is adjusted in the height-regulating component, displacement that the grass guard occurs in the up-down direction with it is described The ratio for the displacement that chassis occurs in the up-down direction is more than or equal to 0.5 and is less than or equal to 0.8.

4. grass trimmer according to claim 1, it is characterised in that:

The host further include:

Walking component, the first drive shaft including traveling wheel and for driving the traveling wheel rotation；

The height-regulating component includes:

Second drive shaft drives the chassis mobile；

Regulation handle, including for the adjustment portion for user's operation；

Link mechanism connects second drive shaft and the regulation handle；

The grass guard is installed to second drive shaft.

5. grass trimmer according to claim 4, it is characterised in that:

Second driving is pivotally connected to the traveling wheel, and the axis that second drive shaft and the traveling wheel rotate is mutually flat Row, the eccentric axis setting that second drive shaft is rotated relative to the traveling wheel.

6. grass trimmer according to claim 5, it is characterised in that:

The traveling wheel includes:

Core wheel positioned at the traveling wheel center；

The distance between first drive shaft and the core wheel are greater than the distance between second drive shaft and the core wheel.

7. grass trimmer according to claim 4, it is characterised in that:

The traveling wheel is rotated by axis of first drive shaft；Second drive shaft is installed to the traveling wheel, and described Two drive shafts and first drive shaft are parallel to each other, and the relatively described first drive shaft eccentric setting of second drive shaft.

8. grass trimmer according to claim 1, it is characterised in that:

The host further include:

Host shell for providing the energy source device in energy source to the engine and for installing the energy source device；

The grass guard is installed to the host shell.

9. a kind of grass trimmer, comprising:

Host, including the mowing element for mowing；

Operating device, for being connect for user's operation and with the host；

The host further include:

Engine, for driving the mowing element to rotate；

Chassis, for installing the engine；

Component is turned up, for adjusting the chassis so that chassis is at least subjected to displacement in the up-down direction；

It is characterized by:

The host further include:

Grass guard, including the gear grass portion for preventing grass cuttings from splashing towards the user being located on rear side of the grass trimmer；

Wherein, when the chassis is adjusted in the height-regulating component, the chassis is subjected to displacement in the up-down direction and this Position is held essentially constant Shi Suoshu grass guard in the up-down direction.

10. grass trimmer according to claim 9, it is characterised in that:

The host further include:

Walking component, the first drive shaft including traveling wheel and for driving the traveling wheel rotation；

The grass guard is installed to first drive shaft.