CN102396303A - Weeding tool - Google Patents

Abstract

The invention relates to a weeding tool, which is used for removing weeds on the ground. The weeding tool comprises a housing, a motor, an output shaft, a working head and a switch. The motor is accommodated in the housing. The output shaft is connected with the motor and extends along a longitudinal axis. The working head is connected with the output shaft and extends spirally along the longitudinal axis. The switch controls the motor to rotate. Compared with the prior art, the weeding tool provided by the invention is convenient to operate and is labor-saving.

Description

The weeding instrument

Technical field

The present invention relates to a kind of weeding instrument.

Background technology

In meadow or garden, wild vegetation for example always is seen everywhere as weeds.The vitality of weeds is often very strong, and they can fight for sunlight limited in meadow or the garden and nutriment, has hindered the growth of the flowers and plants of normal plantation, so need handle the way of these weeds.The method that generally weeds a garden all is on the surface in soil, to carry out; Can only remove like this and be positioned at lip-deep weeds branches and leaves; Can not eliminate the weeds root that is arranged in the soil; Weather weeds through being fit to can regrow out from the soil again, and the manpower and financial resources of work cost is lost in vain before making.Just can accomplish to remove up hill and dale so preferably weeds are rooted out.

Usually the mode that weeds out the rank grass has following so several kinds, and a kind of method is directly manual pulling out, and operator's the branches and leaves of holding weeds in hand firmly outwards pull out then root is extracted in the soil.But relatively effort is pulled out in pure like this craft, and efficient is lower, and in the process that weeds out the rank grass, the earth of taking out of also can splash on operator's the pin easily, and the operator makes dirty.Also having a kind of method is to use hand-operated tools, like spades, spade the weeds root is shoveled out, perhaps announces the hand-operated tools of the trident formula that discloses among the patent US4819736 like the U.S.; Working head has pointed prong like; Be convenient to working head and insert ground, but the working head of these hand-operated tools is often relatively heavier, and need remove so that weeds are eradicated through operator's manual manipulation working head fully; Concerning labourer, relatively require great effort like this; And it is not thorough to weed out the rank grass, and efficient is very low, sometimes also can be because of carelessness the root of other plant be caused damage.

Also have a kind of hand-operated tools that discloses like U.S. bulletin patent US5261496, its working head is several acupunctures of arranging side by side, and ground is thrust in operation acupuncture during operation, and the root of weeds is held in acupuncture, and that exerts oneself then extracts.But therefore this instrument catches the efficient of weeds not high because acupuncture is difficult to aim at weeds, and manual operating operation relatively requires great effort, and effect is also bad.

Also have a kind of hand-operated tools that discloses like U.S. bulletin patent US5441118, its working head has the many steel wires of shape and space interval in the shape of a spiral, rotatably inserts underground; Steel wire can be held the weeds root; Labourer firmly upwards extracts then, so no doubt can weed a garden more effectively, but need the manual throw of labourer; Need bigger power that the related weeds root of working head is extracted from earth then; And need manually the weeds root to be removed from working head, operation is still relatively required great effort like this, and is easy inadequately.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of easy to operate, labour-saving weeding instrument.

The present invention solves the technical scheme that the prior art problem adopted: a kind of weeding instrument, be used to remove weeds, and the weeding instrument comprises housing; Be contained in the motor of housing; Link to each other with motor and the output shaft that extends of axis longitudinally; The working head that is connected with output shaft, working head extends along the axis spiral; And the switch of control revolution.

Preferably, the switch controls motor is rotated in the forward, and makes working head do motion clockwise around axis; The switch controls motor is done reverse rotation, makes working head do motion counterclockwise around axis.

Preferably, the rotating speed of working head is that per minute 200 to 400 changes.

Preferably, the weeding instrument also comprises the speed adjusting gear of controlled working head rotating speed.

Preferably, the weeding instrument also is included as the dc source that motor provides power.

Preferably, dc source is the lithium battery bag.

Preferably, the range of nominal tension of dc source is 10 volts to 36 volts.

Preferably, the weeding instrument comprises the handle that is used to grip.

Preferably, the weeding instrument has the output shaft of being socketed on and telescopic sleeve, and handle is installed on the sleeve.

Preferably, the weeding instrument also comprises the extension rod that connects housing, and handle is installed on the extension rod.

Compared with prior art, beneficial effect of the present invention is: utilize the working head work of drive power source weeding instrument, thus easy to operate, and weeding ratio is high.

Description of drawings

Above-described the object of the invention, technical scheme and beneficial effect can combine accompanying drawing to describe and clearly acquisition through the following detailed description that can realize specific embodiment of the present invention simultaneously.

Identical label in accompanying drawing and the specification is used to represent element identical or that be equal to symbol.

Fig. 1 is the sketch map of the weeding instrument of one embodiment of the invention.

Fig. 2 is the generalized section along the A-A line of weeding instrument shown in Figure 1.

Fig. 3 is the A part enlarged diagram of weeding instrument shown in Figure 2.

Fig. 4 is the B part enlarged diagram of weeding instrument shown in Figure 2.

Fig. 5 is the enlarged diagram of the power end of weeding instrument shown in Figure 1.

Fig. 6 is the sketch map of power end of the weeding instrument of second embodiment of the invention.

Fig. 7 is the enlarged diagram of the working end of weeding instrument shown in Figure 1.

Fig. 8 is the front view of the working head of weeding instrument shown in Figure 1.

Fig. 9 is the sketch map of peeling off assembly of weeding instrument shown in Figure 1.

Figure 10 is the sketch map of peeling off assembly of the weeding instrument of third embodiment of the invention.

Figure 11 is the sketch map of peeling off assembly of the weeding instrument of fourth embodiment of the invention.

Figure 12 is the C part enlarged diagram of peeling off assembly of the weeding instrument of fourth embodiment of the invention.

Figure 13 is the exploded perspective view of peeling off assembly of the weeding instrument of fourth embodiment of the invention.

Figure 14 is the sketch map that part sleeve and sliding part are removed in the zone, working end of weeding instrument shown in Figure 1.

Figure 15 is the sketch map that part sleeve and sliding part are removed in the zone, working end of the weeding instrument of fifth embodiment of the invention.

Figure 16 is the sketch map that the part sleeve is removed in first gear cover zone of weeding instrument shown in Figure 1.

Figure 17 is the sketch map that the working head of weeding instrument shown in Figure 1 turns clockwise.

Figure 18 is the sketch map that the working head of weeding instrument shown in Figure 1 is rotated counterclockwise.

Figure 19 is the sketch map that assembly reaches primary importance of peeling off of weeding instrument shown in Figure 1.

Figure 20 is the sketch map that assembly reaches the second place of peeling off of weeding instrument shown in Figure 1.

1, weeding instrument 2, sleeve 3, output shaft

4, power source 5, working head 6, peel off assembly

7, handle 8, extension rod 11, primary importance

12, the second place 20, locating hole 21, spatial accommodation

23, bearing 24, bearing 25, chute

26, first gear cover, 27, second gear cover, 28, first elastic component

29, second elastic component 30, axis 31, power end

32, working end 41, housing 42, motor

43, switch 51, connector portions 52, spire

53, end 54, tip 61, sliding part

62, stripper 63, connecting rod 64, around axle sleeve

65, bearing pin 200, outer surface 201, inner surface

231, dead eye 261, cannelure 262, first bearing pin

263, first the perforation 611, the perforation 620, working face

621, auxiliary section 622, first side 623, second side

624, first make contact 625, second contact point 626, tooth-shape structure

641, through hole 642, cannelure 642 ', blind hole

643, waist d, inside diameter D, spiral external diameter

L, pitch S, ground

Embodiment

About detailed description of the present invention and technology contents, conjunction with figs. is explained as follows, yet appended accompanying drawing only provides reference and explanation, is not to be used for the present invention is limited.

Referring to figs. 1 through shown in Figure 4, weeding instrument 1 is longitudinally and extends, and it comprises along the sleeve 2 of this longitudinally extension, the working head 5 that is used to that the power source 4 of power is provided and is used to grasp weeds.The inside of sleeve 2 has spatial accommodation 21, and the cross section of sleeve 2 can be shapes such as circular or square or triangle.Have output shaft 3 in the spatial accommodation 21 of sleeve 2, sleeve 2 is socketed on the output shaft 3.Output shaft 3 has axis 30 longitudinally, and the bearing of trend of this axis 30 is consistent with the longitudinally of weeding instrument 1, the central axes of axis 30 and sleeve 2.Output shaft 3 can be around 30 rotations of this axis, it comprise selectively operation around axis 30 be rotated in a clockwise direction or around axis 30 along rotation counterclockwise.One end of output shaft 3 is a power end 31, and the other end is working end 32, and power end 31 is used to connect power source 4, and working end 32 is used to connect working head 5.

Please refer to shown in Figure 5ly, have bearing 23 at sleeve 2 near the end of power end 31 1 ends, in the spatial accommodation 21 of bearing 23 between sleeve 2 and output shaft 3.Bearing 23 has certain thickness along axis 30 directions.The effect of bearing 23 main support power ends 31.The exterior contour of bearing 23 matches with the cross section of sleeve 2, makes bearing 23 and sleeve 2 keep tight fits, make so do not produce between the two relative to move.Certainly in other embodiments, bearing 23 can also adopt flat side to be connected or other common fixed connection modes with sleeve 2.The central authorities of bearing 23 offer dead eye 231.In the present embodiment, the power end 31 of output shaft 3 can pass dead eye 231 and is connected with power source 4 from spatial accommodation 21.Power end 31 is joined with dead eye 231 pines, and so output shaft 3 comprises that the rotation of power end 31 can not receive the influence of bearing 23.But bearing 23 can move radially along sleeve 2 by restricted power end 31 again, so keeps the stable duty of power end 31, plays the effect of supporting motive force end 31.Power end 31 can be common sphere ball contact matching with dead eye 231.As shown in Figure 2, comprise bearing 24 at sleeve 2 equally near the other end end of working end 32.Bearing 24 is similar with the effect of bearing 23, and bearing 24 is also similar with bearing 23 with the fit system of output shaft 3 and sleeve 2.Bearing 24 and sleeve 2 tight fits, bearing 24 have dead eye can let working end 32 or working head 5 pass.In the present embodiment, the working end 32 of output shaft 3 is passed bearing 24 and is connected with working head 5.In other embodiments, working end 32 can be positioned at spatial accommodation 21, and working head 5 passes bearing 24 and is connected with working end 32.

As shown in Figure 5, be used to provide the power source 4 of power to comprise housing 41, accommodate motor 42 in the housing 41, motor 42 is used to provide power.But being connected of power end 31 transmissions of motor 42 and output shaft 3, can give output shaft 3 for its rotation transmission of power.Also have switch 43 on the power source 4, switch 43 can be located on the housing 41 so that operation.Switch 43 is used to control the rotation of motor 42.In the present embodiment; Switch 43 has at least three control gears; One grade is that control motor 42 is rotated in the forward, and output shaft 3 is turned clockwise around axis 30, and one grade is that control motor 42 is done reverse rotation; Output shaft 3 is rotated counterclockwise around axis 30, and also having one grade is motor 42 to be stopped the rotation be in off position.Certainly, switch 43 can have multiple concrete form, for example as button type, and the switch form that knob etc. are common.In a word, switch 43 controllable motor 42 start or close, and can also control output shaft 3 respectively and do clockwise rotating and rotating counterclockwise around axis 30.In addition, can also be provided with the speed adjusting gear (not shown) that is used for convenient adjusting working head rotating speed on the switch 43, to regulate the working head operate as normal that adapts to different size dimensions.

For power source 4 provides the power source that can comprise various ways of power, for example adopt power brick to make dc source and drive, power brick can have the function of charging, and in preferred embodiment, power brick can be the lithium battery bag.If when using weeding instrument 1 not have enough electric power, can power brick be unloaded and charge.If weeding instrument 1 is combined with a plurality of power brick, can under the situation of a power brick charging, be installed to weeding instrument 1 with the another one power brick and carry out work, two power brick are exchanged upper/lower positions more when the time comes.Can realize that like this weeding instrument 1 works for a long time, very convenient and swift.Need certain rotating speed for making working head 5 reach suitable duty, when per minute 200 goes to 400 commentaries on classics, reach proper working condition through the rotating speed that experiment showed, working head 5.For making working head 5 maintain certain rotating speed, in the present embodiment, the rated voltage that needs power brick is more than 10 volts.From using power brick safety and the consideration that avoids waste, the rated voltage of power brick is preferable below 36 volts simultaneously, and certainly, rated voltage also can be set in more than 36 volts.In most preferred embodiment, the rated voltage of power brick can be 10.8 volts, 14.4 volts, 18 volts etc.

Certainly in other embodiments, weeding instrument 1 can also electrically connect with the AC power of outside, utilizes AC power to provide power to motor 42 work.

As shown in Figure 5, for handled easily person holding operation weeding instrument 1, also comprise the handle 7 that is used to grip on the weeding instrument 1.Handle 7 can be fixedly mounted on the housing 41, and it has the holding part that is used to grip.Certainly, other embodiment can also be arranged, handle can be installed on the sleeve 2, and sleeve 2 can be flexible changing length along axis 30, pleasant grip position when reaching work.

As shown in Figure 6, for cooperating the use of different operating environment, weeding instrument 1 can also be provided with extension rod 8.Extension rod 8 can be arranged on the housing 41 or sleeve 2 on; The extension axis of extension rod 8 can be parallel or not parallel with the axis 30 of output shaft 3; On the extension rod 8 handle 7 can be set, so can conveniently make the operator control weeding instrument 1 from afar and weed a garden or control weeding instrument 1 and remove the regional weeds that operators such as being positioned at flower bed or narrow gap can't stand.

To shown in Figure 8, working head 5 comprises connector portions 51 and spire 52 like Fig. 7.Connector portions 51 can be fixedly connected on working end 32.Fixed connection can comprise other common connected modes such as electric welding.Can keep rotatablely moving of working head 5 to keep synchronously consistent like this with rotatablely moving of output shaft 3.In the present embodiment, connector portions 51 roughly is the frustum shape of hollow, extends and is tapered towards the direction of spire 52 along axis 30.In other embodiments; Can also there be other forms of matching and fixing working end 32 with the connector portions 51 of working head 5; For example working end 32 all is designed with concaveconvex structure with connector portions 51, and its socket is cooperated, and perhaps utilizes lock member with modes such as both fix.

The spire 52 of working head 5 is that one is connected with connector portions 51, perhaps waits other common modes to be fixedly connected with welding.In the present embodiment, spire 52 is processed into spirality by steel wire, and it extends along axis 30 spirals.In the present embodiment, reach reasonable effect for making weeding, the inner diameter d of steel wire itself is roughly 6 millimeter.One end end 53 of steel wire is fixedly attached to connector portions 51, and the other end of steel wire is sharpened to be handled, and forms to have the rigidity inclined-plane and sharp-pointed sharp tip 54, makes spire 52 can get into ground comparatively easily.The radius of spin of spire 52 is fixed, so the roughly cylindrical structure of spire 52.In the present embodiment, the spiral D outer diameter of spire 52 is roughly 36 millimeter.Certainly, in other embodiments, the radius of spin of spire 52 can also be arranged to unequal situation, and for example radii size progressively changes, and the shape of spire 52 roughly is conical or inverted taper shape like this.In the present embodiment, have a constant pitch between the spiral of spire 52, rather than nonseptate together adjacent, it is more convenient easily so can to make spire 52 pierce ground.In the present embodiment, the pitch L of spire 52 is 25 millimeter.In addition, spire 52 is made up of rigid material, and in the present embodiment, the material of spire 52 is bigger materials of hardness such as stainless steel, carbon steel.Guarantee that like this spire 52 can not damage in the course of the work easily.In the operate as normal, power source 4 can make the ground that pierces of working head 5 rotation through output shaft 3, and spire 52 surrounds the weeds root in rotary course, and working head 5 is pulled back on the ground then.Remove weeds that invest working head 5 and earth again.

As shown in Figure 9, weeding instrument 1 also comprises peels off assembly 6.Peel off assembly 6 and be positioned at working end 32 near output shaft 3.Peel off assembly 6 and driven by rotatablely moving of said working head 5 and do linear moving along axis 30 directions, it is used for being attached to earth or the weeds cleaning on the working head 5 and breaking away from working head 5.Peel off that assembly 6 mainly comprises sliding part 61, stripper 62, connecting rod 63 and around axle sleeve 64.Among the embodiment as shown in Figure 9, sliding part 61 is the tubular construction of hollow, and sliding part 61 is socketed on the outer surface 200 of sleeve 2 and can moves up and down along axis 30 directions.Shown in figure 14, in the spatial accommodation 21 of sleeve 2, also be provided with around axle sleeve 64, be arranged between output shaft 3 and the sleeve 2 around axle sleeve 64, and between bearing 23 and bearing 24.Be socketed on the output shaft 3 around axle sleeve 64, its central authorities are provided with through hole 641 along axis 30 directions, can let output shaft 3 pass.Has certain length around axle sleeve 64 along axis 30 directions.In that waist 643 has around the cannelure 642 of output shaft 3 axis 30 around the side of axle sleeve 64.In the present embodiment, cannelure 642 caves inward and has certain degree of depth.But the width of cannelure 642 is the width of receiving bolt or bearing pin roughly.Cannelure 642 links to each other with the inner surface 201 of sleeve 2.The effect that cannelure 642 is set is to make around axle sleeve 64 convenient and other element mechanical connections.

In other embodiment, on axle sleeve 64, also cannelure 642 can be set, but on two relative directions radially of the upper edge, side of axle sleeve 64 axis 30, blind hole 642 ' being set, shown in figure 15.Blind hole 642 ' is radially extended and is had certain length, and an end of blind hole 642 ' then links to each other with the inner surface 201 of sleeve 2.Blind hole 642 ' is symmetrical set along axis 30.Certainly in other embodiments, blind hole 642 ' also can be arranged to asymmetric form, for example becomes 90 degree to intersect.And the quantity of blind hole 642 ' also is not limited to two, is provided with one, three or also be fine more than three, for example is arranged to three blind hole 642 ' or four blind holes 642 ' that are mutually 90 degree that respectively become 120 degree.

To shown in Figure 17, on sleeve 2, be provided with chute 25 like Fig. 9, chute 25 has certain length along the extension of axis 30 directions.The width of chute 25 roughly can be slightly larger than the width of bearing pin or bolt or other fixtures, can let bearing pin or bolt pass chute 25 like this.In the present embodiment, chute 25 is corresponding with the cannelure 642 around axle sleeve 64.Groove 25 is connected with cannelure 642.Among other embodiment, 25, two chutes 25 of chute that all have two correspondences on the sleeve 2 are parallel to each other and these two chutes 25 and axis 30 coplanes.

Shown in figure 14, on sliding part 61, have perforation 611, perforation 611 is arranged on along on two relative directions radially of axis 30.Perforation 611 has certain length, is socketed on 2 last times of sleeve at sliding part 61, chute 25 connections on end of perforation 611 and the sleeve 2; Another end of perforation 611 is then passed sliding part 61 and is communicated with external environment condition.So, cannelure 642, groove 25 and bore a hole and 611 be one and be communicated with.By fixture for example bearing pin 65 can pass the perforation 611 on the sliding part 61, chute 25 and the cannelure on axle sleeve 64 642 on the sleeve 2 successively from external environment condition; Bearing pin 65 is fixedly connected respectively around axle sleeve 64 and sliding part 61, and it also receives certain position-limiting action of chute 25 simultaneously.Receive the driving of power when sliding part 61; Sliding part 61 can drive bearing pin 65 can be in chute 25 along two of axis 30 relative to direction on move; Bearing pin 65 drives around axle sleeve 64 and in the spatial accommodation 21 of axis 30 directions at sleeve 2, moves simultaneously, and sliding part 61 moves along axis 30 directions on the surface of sleeve 2.Bearing pin 65 is moved play restriction owing to there is chute 25 to have certain length, make sliding part 61 and also be to receive certain limitation along moving of axis 30 directions around axle sleeve 64.Certainly at the fixture that can adopt other, for example in other embodiments, can in cannelure 642 and perforation 611, screw thread be set, adopt bolt thread connection cannelure 642, chute 25 and bore a hole 611.

To shown in Figure 13, connecting rod 63 is arranged between sliding part 61 and the stripper 62 like Fig. 9.Connecting rod 63 mainly works to connect sliding part 61 and stripper 62.Connecting rod 63 roughly extends along 30 the direction of paralleling to the axis, and the one of which end is fixedly connected sliding part 61, and the other end is fixedly connected stripper 62.In the embodiment shown in fig. 9, connecting rod 63 is positioned at the outside of sleeve 2.Two connecting rods 63 are along axis 30 symmetries, and connecting rod 63 is to the distance of the axis 30 spiral D outer diameter greater than spire 52, and connecting rod 63 can not touch spire 52 like this, makes it can not hamper the motion of spire 52.In the present embodiment, connecting rod 63 can be one-body molded with sliding part 61 and stripper 62, also can pass through other common fixed connection modes, and for example screw such as locks at mode.

The stripper 62 of peeling off assembly 6 is positioned near the spire 52 of working head 5.To shown in Figure 13, stripper 62 roughly has working face 620 like Fig. 9, and this working face 620 is approximately perpendicular to the axis 30 of output shaft 3.Stripper 62 has the auxiliary section 621 that cooperates with the surface of spire 52 on this working face 620.In one embodiment of this invention, as shown in the figure, auxiliary section 621 is semicircular breach, and its profile is the arc of semicircle, and its radius is slightly larger than the spiral external diameter R of spire 52.The breach that auxiliary section 621 forms just in time can pass by holding portion spire 52, and the surface of spire 52 keeps cooperating with the profile of auxiliary section 621 when passing.In another embodiment of the present invention, to shown in Figure 13, auxiliary section 621 also is roughly semicircular breach like Figure 11, and its profile is the spirality of extending along axis 30 directions.Simultaneously, has tooth-shape structure 626 on its spiral profile.The breach that auxiliary section 621 forms can pass by holding portion spire 52 equally.Like this, make the surperficial contact area of profile and spire 52 of auxiliary section 621 more, simultaneously tooth-shape structure 626 make stripper 62 to peel off the effects of earth and weeds from spire 52 better.Certainly, other embodiment can also be arranged, shown in figure 10, stripper 62 can also be for having the flat board of arc notch.In a word, the purpose of stripper 62 is to make spire 52 in the process of rotation, contact with stripper 62 and produce along the frictional force of axis 30 directions.It should be noted that like Figure 17 and shown in Figure 180 the both sides that stripper 62 is positioned at working face 620 have first side 622 and second side 623 on the other side respectively.Wherein, first side 622 towards 54, the second sides 623, tip of working head 5 towards power source 4.In operate as normal, when spire 52 rotated towards a direction, first side 622 of stripper 62 contacted with the surface of spire 52, and generation is positioned at the first make contact 624 on first side 622; When spire 52 rotated towards opposite other direction, second side 623 contacted with the surface of spire 52, and generation is positioned at second contact point 625 on second side 623.But there are offset distance in the first make contact 624 and second contact point 625 apart from axis 30 respectively not on axis 30, but the first make contact 624 and second contact point 625 are symmetrical set with respect to axis 30.

The spire 52 of working head 5 is owing to be designed to along the extension of axis 30 direction spirals, so spire 52 has the hand of spiral around axis 30.In the present embodiment, its hand of spiral be as shown in fig. 1 along axis 30 from power source 4 point to working heads 5 clockwise direction, certainly at other embodiment, spire 52 can be designed to the hand of spiral for counterclockwise.In the present embodiment, when output shaft 3 when its hand of spiral promptly turns clockwise, the spire 52 of working head 5 is also done and is turned clockwise.Because spire 52 turns clockwise, as reference system, stripper 62 is rotated counterclockwise with respect to spire 52 with spire 52.Shown in figure 17, this moment, first side 622 of stripper 62 contacted with the helical surface of spire 52, and generation frictional force promotion stripper 62 promptly moves to the direction of power source 4 along axis 30 along the direction of arrow shown in Figure 17.

In the present embodiment, if spire 52 rotates against this hand of spiral, promptly spire 52 is done when being rotated counterclockwise, and as reference system, stripper 62 is equivalent to do clockwise motion with spire 52.Shown in figure 18, this moment, 623 helical surface with spire 52 in second side of stripper 62 contacted, and generation frictional force promotion stripper 62 promptly moves to the tip of spire 52 54 directions along axis 30 along the illustrated direction of arrow.And stripper 62 is fixedly connected through connecting rod 63 with sliding part 61, does along axis 30 to working head 5 directions or to the rectilinear motion of power source 4 directions so the athletic meeting of stripper 62 drives the whole assembly 6 of peeling off.

Like Figure 17 and shown in Figure 19, when spire 52 turned clockwise, stripper 62 received function of friction and moves along the direction of axis 30 to power source 4 constantly.After moving certain distance; When stripper 62 moves to the connector portions 51 near working head 5; The end 53 that contacts of spire 52 and stripper 62 at spire 52; 52 pairs of strippers 62 of spire this moment do not produce and continue to promote its frictional force of advancing, so stripper 62 is limited in motion in the very little interval range.Spire 52 still can receive power source 4 to drive to do to turn clockwise so the rectilinear motion of stripper 62 stops, and the position of peeling off assembly 6 places this moment is primary importance shown in figure 19 11.Like Figure 18 and shown in Figure 20, when spire 52 was rotated counterclockwise, stripper 62 moved to the tip of working head 5 54 directions.When stripper 62 moves to the tip 54 of working head 5; The tip 54 that contacts of spire 52 and stripper 62 at spire 52; 52 pairs of strippers 62 of spire this moment do not produce and continue to promote its frictional force of advancing, so stripper 62 is limited in motion in the very little interval range.Spire 52 still can be rotated counterclockwise so the rectilinear motion of stripper 62 stops, and the position of peeling off assembly 6 places this moment is the second place shown in figure 20 12.And peel off assembly 62 between the primary importance 11 and the second place 12 time, 5 pairs of strippers of working head 62 produce frictional force, drive stripper 62 motions.In the present embodiment, the distance between the primary importance 11 and the second place 12 is 10 centimetres, and such is not too large too dark apart from the hole that makes working head 5 pierce ground formation is set, and avoids the soil is damaged when can extract weeds.It should be noted that distance between the primary importance 11 and the second place 12 is that length with the chute 25 of sleeve 2 is complementary.

Like Fig. 1 to Fig. 4 and shown in Figure 16, in the spatial accommodation 21 of sleeve 2, also have first gear cover, 26 and second gear cover, 27, the first gears cover, 26 and second gear cover 27 and can play the effect that assembly 6 moves of peeling off that limits in the compartment of terrain along axis 30 directions.First gear cover, 26 and second gear cover 27 also is arranged at respectively between sleeve 2 and the output shaft 3.First gear cover, 26 and second gear cover 27 lays respectively at around the both sides of axle sleeve 64, and between bearing 23 and bearing 24.Like Fig. 4 and shown in Figure 16, the central authorities of first gear cover 26 have first perforation 263 that can let output shaft 3 pass.With around axle sleeve 64 similar be, the waist of first gear cover 26 has cannelure 261, cannelure 261 is provided with around axis 30.The width of cannelure 261 can hold the width of bearing pin or bolt or other fixtures.Surface at sleeve 2 is provided with locating hole 20 with cannelure 261 corresponding places, and cannelure 261 and locating hole 20 are connected.It is fixing with cannelure 261 backs that first bearing pin 262 can pass locating hole 20 successively.Make first gear cover 26 and relatively-stationary the coupling together in sleeve 2 positions like this, first gear cover 26 can't move along axis 30 directions.The situation of second gear cover, 27 and first gear cover 26 is similar, is fixedly connected with sleeve 2 through bearing pin equally, does not just add to give unnecessary details at this.Certainly, the invention is not restricted to the mode that bearing pin is fixedly connected gear cover and sleeve, can also pass through the concaveconvex structure snap fit, screw locks the fixed connection mode that waits other.

As shown in Figure 2, at first gear cover 26 and around first elastic component, 28, the first elastic components 28 being set between the axle sleeve 64 around output shaft 3 settings and between output shaft 3 and sleeve 2.First gear cover 26 and the distance between axle sleeve 64 are slightly larger than the drift of first elastic component 28.In the present embodiment, the two ends of first elastic component 28 all belong to free end.When between the two distance was reduced, an end of first elastic component 28 can be connected to first gear cover 26, and the other end can be connected to around axle sleeve 64.When first elastic component 28 was compressed, it can provide flexible restoring force to around axle sleeve 64.What situation was similar with it is, second elastic component 29 is arranged on second gear cover 27 and between axle sleeve 64, and equally between output shaft 3 and sleeve 2.The two ends of second elastic component 29 also all belong to free end, and when between the two distance was reduced, the one of which end was connected to second gear cover 27, and the other end can be connected to around axle sleeve 64.Certainly, the invention is not restricted to this, the two ends of elastic component also can be fixedly attached to the gear cover by an end, and the other end is fixedly attached to around axle sleeve 64; Perhaps an end of elastic component belongs to free end, and the other end is fixedly attached on the corresponding element.The effect of first elastic component 28 is following: when stripper 62 was positioned at primary importance 11, the distance between axle sleeve 64 and first gear cover 26 was less than the drift of first elastic component 28, so first elastic component 28 is in compressive state.First elastic component 28 can produce along the thrust of axis 30 to working head 5 most advanced and sophisticated 54 directions by opposing connection axle sleeves 64, and the stripper 62 and the spire 52 of working head 5 are kept in touch, and avoids occurring the situation in the space of spiral spacer that stripper 62 just in time is in spire 52.In like manner, the effect of second elastic component 29 is when stripper 62 is positioned at the second place 12, produces along the thrust of axis 30 to power source 4 directions, and stripper 62 and spire 52 are kept in touch, and avoids stripper 62 to be positioned at the space of the spiral spacer of spire 52.

Introduce the course of work of weeding instrument 1 below in detail.Like Figure 19 and shown in Figure 20, at first make working head 5 aim at weeds and be placed on the S of ground, at this moment, the whole assembly 6 of peeling off also rest on the ground.Start power source 4 then; Through output shaft 3 spire 52 of working head 5 is rotated along the hand of spiral; Spire 52 progressively pierces ground and can arrive whole spire 52 always and all submerge underground; And in this process, the stripper 62 of weeding assembly 6 promptly moves up along the direction of axis 30 to power source 4 owing to receive the frictional force of spire 52.In the whole process, stripper 62 all rest on the ground always.When whole spire 52 submerge underground after, stripper 62 is in primary importance 11.At this moment, switch 43 control working heads 5 stop the rotation, and spire 52 has grasped the weeds root, can catch handle or sleeve 2 that spire 52 is extracted ground then easily, and the weeds root that locates below ground level is so originally promptly extracted ground very easily.

Then, start power source 4 once more, the spire 52 that makes working head 5 rotates against the hand of spiral, because stripper 62 receives the frictional force of spire 52 and promptly moves earthward along the direction at the tip 54 of the working head 5 of axis 30.In this moving process, stripper 62 promotes attached to earth and weeds on the spire 52 earth and weeds to be separated from from spire 52.When stripper 62 moved to the second place 12, all were stripped from attached to earth on the spire 52 and weeds.Like this, need not manpower can dispose invest on the spire 52 earth and weeds, saved manpower, and only needed Push switch 43 to control, easy to operate.

Claims (10)

1. a weeding instrument is used to remove weeds, it is characterized in that: said weeding instrument comprises housing; Be contained in the motor of said housing; With the output shaft that said motor links to each other, said output shaft longitudinally axis extends; With the working head that said output shaft is connected, said working head extends along said axis spiral; And the switch of controlling said revolution.

2. weeding instrument according to claim 1 is characterized in that: said switch controls motor is rotated in the forward, and makes said working head do motion clockwise around said axis; Said switch controls motor is done reverse rotation, makes said working head do motion counterclockwise around said axis.

3. weeding instrument according to claim 2 is characterized in that: the rotating speed of said working head is that per minute 200 to 400 changes.

4. weeding instrument according to claim 2 is characterized in that: said weeding instrument also comprises the speed adjusting gear of the said working head rotating speed of controlled.

5. weeding instrument according to claim 1 is characterized in that: said weeding instrument also is included as the dc source that said motor provides power.

6. weeding instrument according to claim 5 is characterized in that: said dc source is the lithium battery bag.

7. weeding instrument according to claim 6 is characterized in that: the range of nominal tension of said dc source is 10 volts to 36 volts.

8. weeding instrument according to claim 1 is characterized in that: said weeding instrument comprises the handle that is used to grip.

9. weeding instrument according to claim 8 is characterized in that: said weeding instrument has and is socketed on said output shaft and telescopic sleeve, and said handle is installed on the said sleeve.

10. weeding instrument according to claim 8 is characterized in that: said weeding instrument also comprises the extension rod that connects said housing, and said handle is installed on the said extension rod.

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