CN208402478U - Grass trimmer - Google Patents

Abstract

The utility model provides a kind of grass trimmer, comprising: shell and cutter head assembly；Cutter head assembly includes: power device and the cutter head with power device transmission connection, which includes multiple blades；Shell includes: top for installing power device and is fixed on top lower section for accommodating the eddy current portion of cutter head；The eddy current portion includes the front end face being set in front of cutter head and the rear end face for being set to cutter head rear；Front end face includes the curved end being arranged respectively along the cutting region outer rim of each blade, and the junction of the adjacent curved end is provided with the groove for entering the eddy current portion for cutting object.Grass trimmer provided by the utility model, reduces the generation of two neighboring curved end junction turbulent flow, cuts to reduce leakage and makes grass trimmer almost the same to the cutting-height of cutting object, improves the cut quality of grass trimmer.

Description

Grass trimmer

Technical field

The utility model relates to a kind of grass trimmers, belong to garden tool set technical field.

Background technique

Grass trimmer (Lawn mower) is also known as weeder, grass mower, lawn mower etc..Grass trimmer is a kind of for trimming The machine tool of lawn, vegetation etc., it saves the activity duration of weeding worker, reduces a large amount of human resources.

Existing bull grass trimmer includes: shell, the near front wheel that housing forward end is arranged in and off-front wheel, setting after shell The left rear wheel and off hind wheel at end are accommodated in shell for the cutter head assembly of mowing and the operating stick to extend back from shell. Cutter head assembly includes: that there are two the cutter heads of blade for tool, and fill with cutter head transmission connection, the power for driving blade to rotate It sets.Shell includes the top for installing power device, and is fixed on the eddy current portion of top lower section.It is past from the bottom of grass trimmer When top-direction is observed, eddy current portion includes being located at the front end face in front of cutter head, rear end face and top plate positioned at cutter head rear, This three encloses the annular space for accommodating cutter head together, and two blades of cutter head are arranged symmetrically along the longitudinal axis of grass trimmer In the left and right sides.Specifically, front end face includes and the corresponding left curved end of the left side blade and right side corresponding with right cutter blades Curved end.When work, grass trimmer moves on lawn or vegetation, by the way that the drawing with bottom plate in front of eddy current portion is arranged in It leads portion and grass or vegetation is forced down to the cutter head cutting that allows it to enter in eddy current portion, then be rotated.Cut off later grass Or vegetation rotates along the annular space in eddy current portion, is discharged to ground from grass cuttings transfer passage after further being crushed by cutter head Or in the grass cuttings storage container of rear installation.

But above-mentioned grass trimmer grass or vegetation are overwhelmed by the bottom plate of guide portion after into cutting in spiral case Cut, often will appear into eddy current portion grass or plant in have part that can not be cut by blade after lodging；Also, it is using In the process it has also been found that being not easy to be cut to by blade positioned at the grass of left curved end and right curved end junction or vegetation, from And the cut quality of grass trimmer is seriously affected.

Utility model content

The utility model provides a kind of grass trimmer, to solve of the existing technology above-mentioned or other potential problems.

Some embodiments according to the present utility model, provide a kind of grass trimmer, comprising: shell and cutter head assembly；It is described Cutter head assembly includes: power device and the cutter head with power device transmission connection, and the cutter head includes multiple blades； The shell includes: top for installing the power device and the eddy current portion being fixed below the top；The whirlpool Stream portion is for accommodating the cutter head；The eddy current portion includes after being set to the front end face in front of cutter head and being set to cutter head rear End face；The front end face includes the curved end being arranged respectively along the cutting region outer rim of each blade, and adjacent institute The junction for stating curved end is provided with the groove for entering the eddy current portion for cutting object.

Grass trimmer as described above, wherein the cutting region of two neighboring blade have lap, and with the two knives The width that groove set by the corresponding two curved end junctions of piece projects in the horizontal plane is greater than the lap and exists The width projected on horizontal plane.

Grass trimmer as described above, wherein the projection width of the groove in the horizontal plane is than the lap in water Projection width big 1mm to 10mm in plane.

Grass trimmer as described above, wherein the projection width of the groove in the horizontal plane is than the lap in water The big 5mm of projection width in plane.

Grass trimmer as described above, wherein the projection of the groove in the horizontal plane and the lap are in horizontal plane On projection central point it is identical.

Grass trimmer as described above, wherein the cutting region is greater than the cutting at a distance from the front end face of eddy current portion Region is at a distance from the side of eddy current portion.

Grass trimmer as described above, wherein the cutting region is 8 to 30mm at a distance from the front end face of eddy current portion.

Grass trimmer as described above, wherein the cutting region is 3-15mm at a distance from the side of eddy current portion.

Grass trimmer as described above, wherein be additionally provided with the careless teeth of multiple combs on the front end face, two neighboring comb grass tooth it Between form for guide cutting object enter the eddy current portion in comb grass channel.

Grass trimmer as described above, wherein the cutter head is made of two blades, and described two blades set up separately to be cut described The left and right sides of careless machine longitudinal axis, and the blade rotates the cut surface to be formed and flushes with the lower edge of the front end face；The whirlpool The front end face in stream portion includes along the left curved end of left side blade cutting region outer rim setting and along right cutter blades cutting region The junction of the left curved end and right curved end is arranged in the right curved end of outer rim setting, the groove.

Grass trimmer as described above, wherein the depth of the groove is 10mm to 200mm.

Grass trimmer as described above, wherein the width of the groove is 10mm to 150mm.

Grass trimmer as described above, wherein the multiple to comb circumferential direction setting of the careless tooth along the front end face.

Grass trimmer as described above, wherein careless tooth being arranged circumferentially along the front end face of the multiple comb.

Grass trimmer as described above, wherein the shell further include: the guide portion in front of the eddy current portion, institute are set The lower contour for stating guide portion front end is higher than the lower contour of the guide portion rear end, and the lower contour of the guide portion two sides Acute angle is formed between the direction of advance of the grass trimmer.

Grass trimmer as described above, wherein the angle of the acute angle is 5 ° to 20 °.

Grass trimmer as described above, wherein the two sides of the front end face of the eddy current portion are additionally provided with guide structure, described to draw Guide structure is formed with along the comb grass channel of the grass trimmer direction of advance.

According to the technical solution of the utility model embodiment, it is arranged in the junction of the two neighboring curved end of eddy current portion It is fluted so that flow direction of air-flow is changed at this, to reduce the generation of turbulent flow at this so that grass at this or Vegetation will not be blown to obtain inclination by turbulent flow, reduce leakage cutting and the inconsistent possibility of cutting-height, improve the cutting of grass trimmer Efficiency and cut quality.

The advantages of additional aspect of the utility model, will be set forth in part in the description, partially will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

By referring to accompanying drawing described in detail below, the above and other purpose of the utility model embodiment, feature and excellent Point will become more clearly understood from.In the accompanying drawings, by by example and it is unrestricted in a manner of multiple implementations to the utility model Example is illustrated, in which:

Fig. 1 is the structural schematic diagram of grass trimmer provided by the embodiment of the utility model；

Fig. 2 is the bottom view of grass trimmer in Fig. 1；

Fig. 3 is the transverse sectional view of grass trimmer in Fig. 1；

Fig. 4 is the longitudinal sectional view of grass trimmer in Fig. 1；

Fig. 5 is the partial enlarged view of location A in Fig. 3；

Fig. 6 is the spiral case of grass trimmer and the position view of blade in Fig. 1；

The fluid that Fig. 7 is generated later for the mower blade rotation in Fig. 1 flows to schematic diagram.

In figure:

1, shell；11, top；

12, eddy current portion；121, front end face；

1211, careless channel is combed；1212, groove；

1213, careless tooth is combed；122, rear end face；

123, top plate；13, cover board；

14, guide structure；141, gusset；

142, careless channel is combed；21, the near front wheel；

22, off-front wheel；31, power device；

311, output shaft；32, cutter head；

321, the first blade；322, the second blade；

41, broken careless corking；42, broken grass plug；

5, weed breaker structure.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term " length ", " width ", " thickness ", " height ", " depth Degree ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", The orientation or positional relationship of the instructions such as " counterclockwise ", " circumferential direction " be based on the orientation or positional relationship shown in the drawings, merely to Convenient for describing the utility model and simplifying description, rather than the device or element of indication or suggestion meaning must have specific side Position is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention, It is a, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be It is connected directly, the mutual of connection inside two elements or two elements can also be can be indirectly connected through an intermediary Interactively, unless otherwise restricted clearly.For the ordinary skill in the art, can understand as the case may be The concrete meaning of above-mentioned term in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down " It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into Row combination and combination.

Embodiment one

Fig. 1 is the structural schematic diagram of grass trimmer provided in this embodiment；Fig. 2 is the bottom view of grass trimmer in Fig. 1；Fig. 3 is The transverse sectional view of grass trimmer in Fig. 1；Fig. 4 is the longitudinal sectional view of grass trimmer in Fig. 1；Fig. 5 is that the part of location A in Fig. 3 is put Big figure；Fig. 6 is to show the position view of the spiral case and blade of grass trimmer.Arrow direction RC expression shown in figure 2 is cut The direction of direction of advance namely the arrow meaning of careless machine is front.

As shown in Figures 1 to 6, grass trimmer provided in this embodiment includes: shell 1, the near front wheel that 1 front end of shell is arranged in 21 and off-front wheel 22,1 rear end of shell is set left rear wheel and off hind wheel, be accommodated in shell 1 for mowing cutter head assembly, And the operating stick (not shown) to extend back from shell 1.

Specifically, please refer to Fig. 3 and Fig. 4, cutter head assembly include: the power device 31 being fixed on shell 1 and with it is dynamic The cutter head 32 that power device 31 is sequentially connected.Wherein, cutter head 32 includes the identical blade of multiple mounting heights, these blades can In the driving lower edge of power device 31, direction rotates to form respective cut surface clockwise or counter-clockwise, thus by grass or Person vegetation is cut into roughly the same height.In other words, grass trimmer provided in this embodiment is bull grass trimmer.

In the present embodiment, power device 31 can be engine or motor, can be bolted on shell In support construction (such as support plate) in body 1.Certainly, the present embodiment is also not excluded for other companies of power device 31 and shell 1 Connect mode.Power device 31 has the output shaft 311 extended down from bottom end.The output shaft 311 is generally perpendicular to ground.

Multiple blades can be sequentially connected by differential mechanism and clutch and output shaft 311.In this way, multiple blades can To be driven via differential mechanism and clutch by the same power device 31, so that multiple blades can be in shell 1 with output shaft 311 axis is that rotation axis is rotated.But in some other embodiment, each blade can also be by individual Power device 31 is driven, that is to say, that bull grass trimmer includes the multiple power devices 31 for respectively driving each blade.When So, the present embodiment is also not excluded for blade and is directly fixedly connected with output shaft 311.

Power device 31 can drive multiple blade rotating Vortexes, such as all rotate clockwise or counter-clockwise；It can also To drive some blades to rotate clockwise, other blades rotate counterclockwise.It should be understood that when rotated in order to avoid blade It interferes, in the blade being mounted in shell 1, the certain angle that blade can be staggered between each other is installed.Meanwhile In order to avoid there are cutting gap, existing between the cutting region of the two neighboring blade of the present embodiment between two neighboring blade Lap, the cutting region of each blade are exactly the region that each blade rotation is formed by where cut surface.For example, working as shell When being equipped with the first blade 321 and the second blade 322 in body 1, the two blades as depicted in figs. 1 and 2 can be staggered 90 °, And the cutting region of the first blade 321 and the second blade 322 overlaps.Similarly, when rotated in order to avoid blade It is interfered between the inner wall of shell 1, certain safety clearance e is provided between the tip of blade and the inner wall of shell 1 and (is asked Refering to Fig. 6).

With reference to Fig. 3 to Fig. 5, shell 1 includes the top 11 for installing power device 31, is fixed on 11 lower section of top and is used for Accommodate cutter head 32 and the eddy current portion 12 completely open towards the direction on ground, in other words for, shell 1 be include eddy current portion 12 Scroll casing shape shell 1 inside.

As shown in the bottom view of Fig. 2, eddy current portion 12 includes positioned at the front end face 121 in 32 front of cutter head, after cutter head 32 The rear end face 122 of side, the left side of connection front end face 121 and rear end face 122 and right side and top plate 123, this is enclosed Concentrated vortex portion 12 is used to accommodate the annular space of cutter head 32.When power device drives these blades to rotate, can be formed more A cutting region for being used to cut grass or vegetation etc..

The front end face 121 of eddy current portion 12 includes the curved end along the setting of each cutting region outer rim, for example, showing in Fig. 2 Grass trimmer out includes the first blade 321 and the second blade 322 along the longitudinal bilateral symmetry arrangement of grass trimmer, and power device 31 is driven When dynamic first blade 321 and the second blade 322 rotate, left side cutting region and right side cutting region can produce, along left side Cutting region outer rim is provided with the left curved end positioned at 321 front of the first blade, and along right side, cutting region outer rim is provided with position Right curved end in 322 front of the second blade, also, left curved end and right curved end have been joined together to form Fig. 2 The front end face 121 of middle eddy current portion 12.In other embodiments, the first blade 321 and the second blade 322 can not also be along mowings The longitudinal axis of machine is symmetrically arranged, for example, the first blade 321 and the second blade 322 can be staggered front to back along the longitudinal axis of grass trimmer Arrangement.

In the junction setting fluted 1212 of the two neighboring curved end of front end face 121, for grass or vegetation etc. Cutting object enters in eddy current portion 12.For example, figures 1 and 2 show that front end face 121 includes left curved end and right curved end Specific example, the groove 1212 passed through for cutting object is provided in the junction of left curved end and right curved end.

Fig. 7 be the present embodiment grass trimmer when blade rotates eddy current portion interior air-flow flow to schematic diagram, air flow direction is such as In figure shown in arrow.As shown in fig. 7, the air-flow that blade rotation generates can be from groove by the way that groove 1212 is arranged in junction At 1212 flow out, without flowing back into eddy current portion, so as to reduce turbulent flow generation, also just reduce turbulent flow to be located at should The influence of the grass of junction perhaps vegetation avoids enter into the grass of position or vegetation at this and is blown to obtain inclination by turbulent flow, so that blade Can by this grass or vegetation be cut into other positions have roughly the same height, with reduce leakage cutting and cutting not Uniformly may.

Optionally, when the cutting region of two neighboring blade has lap, then cutting along the two adjacent knife blades It is wide to cut the projection of groove 1212 that the junction of two neighboring curved end set by the outer rim in region opens up in the horizontal plane Degree is greater than the projection width of the lap of the cutting region of the two adjacent knife blades in the horizontal plane, so as to further subtract Perhaps the influence reduction leakage cutting of vegetation or cutting-height are inconsistent to grass for small junction turbulent flow.

By it is shown in Fig. 2 include the bull grass trimmer of two blades for, the company of left curved end and right curved end Connect weight of the projection width of the groove 1212 at place in the horizontal plane greater than the first blade 321 and the cutting region of the second blade 322 The projection width of folded part in the horizontal plane.Specifically, in the present embodiment, front end face 121 two neighboring curved end Weight of the projection width of the groove 1212 of junction in the horizontal plane than the first blade 321 and the cutting region of the second blade 322 The width that folded part projects in the horizontal plane big 1mm to 10mm.Preferably 5mm.

Again optionally, the connection place of two curved ends set by the cutting region outer rim of two neighboring blade opens up The projection in the horizontal plane of groove 1212 can be projected in the horizontal plane with the lap of the cutting region of the two blades Central point it is identical, thus improve into grass left and right sides into grass or vegetation the uniformity, make grass trimmer obtain preferably cutting Quality.By taking Fig. 1 as an example, it that is to say that left curved end connects groove 1212 that place opens up with right curved end in the horizontal plane It projects identical as the projection centre of the lap of the first blade 321 and the cutting region of the second blade 322 in the horizontal plane.

With continued reference to Fig. 5, the depth b for the groove 1212 that the connection place of two neighboring curved end opens up be chosen as 10 to 200mm, such as can be 10mm, 50mm, 80mm, 100mm, 150mm and 200mm.When the depth of groove 1212 is arranged to 10mm When to 200mm, the cutting requirement of existing grass trimmer can satisfy.Further, the width a of groove 1212 can be 10mm extremely 150mm, such as can be 10mm, 50mm, 80mm, 100mm, 130mm and 150mm.When the width of groove 1212 is arranged to 10mm When to 150mm, good combing effect can be played to most grass or vegetation, enable the grass in front of junction suitable Enter eddy current portion 12 in the slave groove 1212 of benefit to cut, and the flowing to grass cuttings in eddy current portion 12 can also be avoided to produce as far as possible It is raw to influence, to guarantee cut quality.

Optionally, as depicted in figs. 1 and 2, cutting region is greater than cutting region at a distance from the front end face 121 of eddy current portion 12 At a distance from the side of eddy current portion 12, that is, cutting region is designed ovalisation.Since blade rotation is formed by cutting area Domain is big at a distance from the front end face 121 of eddy current portion 12, allows for grass or vegetation in front of grass trimmer in this way and is crossing eddy current portion 12 front end face has enough spaces after entering eddy current portion 12 to restore upright state, to facilitate the cutting of blade；And it cuts It cuts region and the lateral distance of eddy current portion 12 is short, it is possible to reduce leakage cutting, and improve the accessibility of grass trimmer.In this implementation In example, cutting region is 8mm to 30mm at a distance from front end face 121, such as can be 21mm or 22mm.Cutting region and side The distance in face is 3mm to 15mm, such as can be 8mm or 9mm.By taking grass trimmer shown in Fig. 2 as an example, eddy current portion 12 is by left and right Two ellipse compositions, accommodate in the ellipse on the left side blade 332, the right ellipse in accommodate blade 321.Blade 321 are formed by cutting region is greater than the cutting region at a distance from right side at a distance from right curved end；Correspondingly, blade 322 are formed by cutting region is greater than the cutting region at a distance from left side at a distance from left curved end.

With continued reference to Fig. 4, it is also optionally provided with grass cuttings transfer passage at the rear of eddy current portion 12, from eddy current portion 12 Rear end face 122 start along in eddy current portion 12 grass or the tangent direction of the vegetation surfaces of revolution extend back, in other words, It is that grass cuttings transfer passage extends along the tangential direction of 32 surfaces of revolution of cutter head.The front end of the grass cuttings transfer passage, which has, leads to whirlpool The opening of the accommodation space in stream portion 12, its rear end can connect straw bag or other grass cuttings storage containers.Optionally, grass cuttings are deposited Storage container can be disassembled from grass cuttings transfer passage.

Broken careless corking 41 and broken grass plug 42 are optionally provided in grass cuttings transfer passage.When to fill in grass cuttings defeated for broken grass plug 42 When sending the predeterminated position in channel, is cut off into the grass of eddy current portion 12 or vegetation by cutter head 32, is then rotated in eddy current portion 12, To further be crushed by cutter head 32, the grass cuttings after being pulverized to are shed from the opening of 12 bottom end of eddy current portion onto ground；When pulling out Out when broken grass plug 42, entered in grass cuttings transfer passage by the smashed grass cuttings of cutter head 32, and passes through the grass cuttings transfer passage and enter In the grass cuttings storage container at rear.

Optionally, the top plate 123 of eddy current portion 12 up extends to form columnar top 11, cylindrical shape top and output Axis 311 is coaxial.In power device 31 is mounted at the top of the cylindrical shape, and the output shaft 311 of the power device 31 is from the cylinder Extend down in circular cavity at the top of shape.

Optionally, shell 1 further includes cover board 13, can be generally circular plate, for covering and fixing grass cuttings Storage container.

Optionally, be connected at the rear of shell 1 and extend to the weed breaker structure 5 on ground, for after cutting turf or Person vegetation arranges smooth.For example, weed breaker structure 5, which can be, is connected to the bottom at 1 rear of shell by connecting rod or the bottom of close to Pressing plate, idler wheel or the wheeled construction of the position in portion.In some alternative embodiments, weed breaker structure can be one piece of rectangle Rubber slab, thus for cutting after turf or vegetation pliable pressure is provided.

The grass trimmer of the present embodiment, by being arranged fluted 1212 in the junction of two neighboring curved end, so that should The flow direction of place's air-flow is changed, so that the generation of turbulent flow at this is reduced, so that the grass or vegetation at this will not be disorderly Stream blows to obtain inclination, reduces leakage cutting and the inconsistent possibility of cutting-height, improves the cutting efficiency and cutting matter of grass trimmer Amount.

Embodiment two

On the basis of the present embodiment and embodiment one, the careless tooth of multiple combs is provided on the front end face 121 of eddy current portion 12 1213, it forms for guiding the cutting objects such as grass or vegetation to enter in eddy current portion 12 between the careless tooth 1213 of two neighboring comb Careless channel 1211 is combed, refering to fig. 1 and Fig. 2.

The grass trimmer of the present embodiment combs careless tooth 1213 by the front end face setting in eddy current portion, so that grass trimmer is advancing When can by comb careless tooth 1213 in front of grass trimmer grass or vegetation comb, sent out similar to combed.Through combing Grass or vegetation after reason are directed into eddy current portion 12 by being formed by the careless channel 1211 of comb between the careless tooth 1213 of two combs It is interior.In this way, grass or plant in front of grass trimmer can in the case where not striking the beam directly through the comb grass channel 1211 into Enter into eddy current portion 12, much the same height is cut into the blade rotated.

Optionally, the careless teeth 1213 of multiple combs along front end face 121 circumferentially.By taking Fig. 2 as an example, set on left curved end Circumferentially along left curved end, the comb grass tooth 1213 being arranged on right curved end is along right arc for the careless tooth 1213 of the comb set End face is circumferentially.By the way that careless tooth 1213 will be combed along front end face 121 circumferentially, can make grass in front of grass trimmer or Person vegetation can enter out of entire eddy current portion 12 width range, and the blade so as to be vortexed in portion 12 is cut, so that Grass or vegetation will not excessively be deposited in the careless teeth 1213 of certain combs and be formed by the careless channel 1211 of comb, to improve grass trimmer Cutting efficiency and cut quality.

Preferably, the careless teeth 1213 of multiple combs being arranged circumferentially along front end face 121, can be improved to grass trimmer The grass in front perhaps the carding effect of vegetation and grass after combing or vegetation can uniformly be combed careless tooth 1213 it Between the comb grass channel 1211 that is formed lead into annular space, avoid it from being blocked in some or certain careless channel 1211 of several combs Place, can also equally reduce from some or it is certain comb grass that careless channel 1211 enters or vegetation it is excessive and can not be complete by blade The possibility cut entirely, to improve the cut quality or cutting efficiency of grass trimmer.

In addition, comb careless channel 1211 width c and depth f (please referring to Fig. 3, Fig. 5 and Fig. 6) can according to actual needs into Row setting, is not specifically limited herein.

Optionally, each blade of cutter head 32 is formed by the front end face 121 of cut surface and eddy current portion 12 when rotated Lower edge flushes, so that from grass that careless channel 1211 enters in eddy current portion 12 is combed or after vegetation is cut into roughly the same height Smoothly left out of eddy current portion 12.

The grass trimmer of the present embodiment is provided with the careless tooth 1213 of multiple combs by the front end face 121 in eddy current portion 12, can be right Grass or vegetation in front of grass trimmer are combed, then by comb the comb grass channel 1211 formed between careless tooth 1213 by grass or Person vegetation introduces in eddy current portion 12 and cuts, and grass or vegetation is enabled to be cut into roughly the same height as far as possible.

Embodiment three

The present embodiment and the difference of any of the above-described embodiment are: shell 1 further includes that drawing for 12 front of eddy current portion is arranged in Portion is led, Fig. 1 and Fig. 4 are please referred to.The front end lower contour that the guide portion is located at front end is higher than the rear end lower contour positioned at rear end, So that the lower contour of guide portion two sides favours the direction of advance of grass trimmer, to prevent guide portion from overwhelming in front of grass trimmer Grass or vegetation, make it easier in the eddy current portion 12 into grass trimmer.

Specifically, guide portion includes top plate and two side plates extended down from the two sides of the lower surface of top plate, the side The height of plate is gradually successively decreased along direction of advance, so that the lower contour of side plate and grass trimmer direction of advance form acute angle d, ginseng Fig. 1 and 4 are read, certainly, in other embodiments, the mode which non-can also gradually successively decrease, such as stairway degression, Huo Zhequ The mode that line successively decreases should all cover within the protection scope of the present utility model.By above-mentioned design, the grass in front of grass trimmer can Be received into side plate and top plate be formed by cavity, to avoid striking the beam, reduce suffered by grass or vegetation from The resistance of shell 1 keeps grass or vegetation to be combed the comb grass channel 1211 formed between careless tooth 1213 in an erect condition as far as possible And groove 1212 set by junction is led into eddy current portion 12.

Optionally, the angle of the acute angle between the front end face 121 and the direction of advance of grass trimmer of eddy current portion 12 be 5 ° extremely 20 °, such as can be 5 °, 10 °, 15 ° or 20 °.When the angle of acute angle takes numerical value as above, resistance suffered by grass trimmer It is smaller and preferable to the guiding function of grass or vegetation.

The grass trimmer of the present embodiment, the direction of advance by the way that the contour line of guide portion two sides to be favoured to grass trimmer are arranged, So as to reduce the advance resistance of grass trimmer and enable grass or vegetation in front of grass trimmer are easier to enter vortex In portion 12.

Example IV

The present embodiment is based on any of the above embodiments, to be connected with guidance knot in the front end face 121 of eddy current portion 12 Structure 14, the guide structure 14 are formed with the guiding channel 142 along grass trimmer direction of advance, as depicted in figs. 1 and 2.

Specifically, guide structure 14 can be and the front end face 121 of eddy current portion 12 is integrally formed forms, and be also possible to lead to The modes such as bolt, screw, welding, bonding are crossed to be fixed on front end face 121.For example, in some embodiments, guide structure 14 It can be and be fixedly connected with or be formed with generally planar plate with right front in 121 left front of front end face of eddy current portion 12 Part has extended to form multiple gussets 141 from the lower surface of plate down, and the guidance formd between two neighboring gusset 141 is logical Road 142.The section shape of guiding channel 142 in the horizontal direction can be rectangle or trapezoidal.

Guide structure is connected by the front end face in eddy current portion, and forms leading along grass trimmer direction of advance in guiding structure Guiding channel 142, grass trimmer front can be made, which to be equivalent to the grass of the entire diameter width of eddy current portion 12 or vegetation, can lead to The groove 1212 for crossing guiding channel 142, guiding channel 1211 and junction enters in eddy current portion 12, then by 32 (example of cutter head Such as the first blade 321 and the second blade 322) cutting.In other words, by the way that guide structure is arranged in front end face, can to cut Careless machine is able to carry out effective cutting within the diameter range of entire eddy current portion 12, thus avoid grass in front of grass trimmer or Vegetation cannot be introduced into eddy current portion 12 along the circumferential movement of eddy current portion 12, so that the cutting width of grass trimmer is wider, with Improve cutting efficiency and cut quality.

Optionally, guide structure extends to the rear of the rear end face 122 of eddy current portion 12.For example, when guide structure is With eddy current portion front end face it is integrally formed or be fixedly connected plate when, which extends to the rear of rear end face 122.

The grass trimmer of the present embodiment improves effective cutting of grass trimmer by connecting guide structure 14 in front end face 121 Distance, so that the cutting efficiency of grass trimmer and cut quality improve.

Finally, it should be noted that embodiment of above is only to illustrate the technical solution of the utility model, rather than to its into Row limitation；Although detailed description, the common skill of this field has been carried out to the utility model referring to aforementioned embodiments Art personnel are it is understood that it can still modify to technical solution documented by aforementioned embodiments, or to its middle part Divide or all technical features are equivalently replaced；And these are modified or replaceed, and do not make the essence of corresponding technical solution de- Range from the utility model embodiment technical solution.

Claims (18)

1. a kind of grass trimmer characterized by comprising shell and cutter head assembly；

The cutter head assembly includes: power device and the cutter head with power device transmission connection, and the cutter head includes more A blade；

The shell includes: top for installing the power device and the eddy current portion being fixed below the top；Institute Eddy current portion is stated for accommodating the cutter head；The eddy current portion includes the front end face being set in front of cutter head and is set to cutter head rear Rear end face；

The front end face includes the curved end being arranged respectively along the cutting region outer rim of each blade, and adjacent described The junction of curved end is provided with the groove for entering the eddy current portion for cutting object.

2. grass trimmer according to claim 1, which is characterized in that the cutting region of two neighboring blade has overlapping portion Point, and the width that groove set by two curved end junctions corresponding with the two blades projects in the horizontal plane is greater than The width that the lap projects in the horizontal plane.

3. grass trimmer according to claim 2, which is characterized in that described in the projection width's ratio of the groove in the horizontal plane The projection width of lap in the horizontal plane big 1mm to 10mm.

4. grass trimmer according to claim 3, which is characterized in that described in the projection width's ratio of the groove in the horizontal plane The big 5mm of the projection width of lap in the horizontal plane.

5. grass trimmer according to claim 2, which is characterized in that the projection of the groove in the horizontal plane with it is described overlapping The central point of the projection of part in the horizontal plane is identical.

6. grass trimmer according to claim 1, which is characterized in that the cutting region is at a distance from the front end face of eddy current portion Greater than the cutting region at a distance from the side of eddy current portion.

7. grass trimmer according to claim 6, which is characterized in that the cutting region is at a distance from the front end face of eddy current portion It is 8 to 30mm.

8. grass trimmer according to claim 6, which is characterized in that the cutting region is at a distance from the side of eddy current portion 3-15mm。

9. grass trimmer according to claim 1, which is characterized in that be additionally provided with the careless tooth of multiple combs, phase on the front end face It combs for adjacent two and forms between careless tooth for guiding cutting object to enter the comb grass channel in the eddy current portion.

10. grass trimmer according to claim 9, which is characterized in that the cutter head is made of two blades, described two knives Piece sets up separately in the left and right sides of the grass trimmer longitudinal axis, and the blade rotates under the cut surface to be formed and the front end face Edge flushes；The front end face of the eddy current portion includes along the left curved end of left side blade cutting region outer rim setting and along the right side The left curved end and right curved end is arranged in the right curved end of side blade cutting region outer rim setting, the groove Junction.

11. grass trimmer according to claim 1, which is characterized in that the depth of the groove is 10mm to 200mm.

12. grass trimmer according to claim 11, which is characterized in that the width of the groove is 10mm to 150mm.

13. grass trimmer according to claim 9 or 10, which is characterized in that the careless tooth of the multiple comb is along the front end face Circumferential setting.

14. grass trimmer according to claim 13, which is characterized in that the multiple to comb careless tooth along the circumferential direction of the front end face It is evenly arranged.

15. -12 described in any item grass trimmers according to claim 1, which is characterized in that the shell further include: be arranged in institute The guide portion in front of eddy current portion is stated, the lower contour of the guide portion front end is higher than the lower contour of the guide portion rear end.

16. grass trimmer according to claim 15, which is characterized in that the lower contour of the guide portion two sides is cut with described Acute angle is formed between the direction of advance of careless machine.

17. grass trimmer according to claim 16, which is characterized in that the angle of the acute angle is 5 ° to 20 °.

18. -12 described in any item grass trimmers according to claim 1, which is characterized in that the two sides of the front end face of the eddy current portion It is additionally provided with guide structure, the guide structure is formed with along the comb grass channel of the grass trimmer direction of advance.