CN102396304B - Weeding tool - Google Patents

Abstract

The invention relates to a weeding tool, which is used for removing weeds. The weeding tool comprises an output shaft, a working head and a stripping component. The output shaft extends along a longitudinal axis. The working head is connected with the output shaft. The working head can rotate around the axis. The stripping component can be driven by the working head. When the stripping component is arranged at a first position, the working head rotates along a first rotating direction, and the stripping component is limited at a place near the first position. When the stripping component is arranged at a second position, the working head rotates along a direction opposite to the first rotating direction, and the stripping component is limited at a place near the second position. Compared with the prior art, the weeding tool provided by the invention is convenient to clear, and the operation of the working head is not influenced.

Description

Weeding tool

Technical field

The present invention relates to a kind of Weeding tool.

Background technology

In meadow or garden, wild vegetation is for example always seen everywhere as weeds.The vitality of weeds is often very strong, and they can fight for sunlight limited in meadow or garden and nutriment, has hindered the growth of the flowers and plants of normal plantation, so need to process the way of these weeds.The method generally weeding a garden is all carried out on native the earth's surface, 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 soil, can from soil, regrow out again through applicable weather weeds, before making, the manpower and financial resources of work cost is lost in vain.Just can accomplish to remove up hill and dale so preferably weeds are rooted out.

Conventionally the mode weeding out the rank grass has following so several, and a kind of method is directly to pull out by hand, and operator's hand is caught the branches and leaves of weeds, then firmly outwards pulls out root is extracted in soil.But relatively effort is pulled out in pure like this craft, and efficiency is lower, and in the process weeding out the rank grass, the earth of taking out of also can splash on operator's pin easily, and operator makes dirty.Also having a kind of method is to use hand-operated tools, as spades, spade shovel out weeds root, or as the hand-operated tools of the trident formula disclosing in U.S. bulletin patent US4819736, 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 heavier, and need manual manipulation working head by operator so that weeds are eradicated and to be removed completely, concerning labourer, relatively require great effort like this, and it is not thorough to weed out the rank grass, efficiency is very low, sometimes also can cause damage to the root of other plant because of carelessness.

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

Also has a kind of hand-operated tools disclosing as U.S. bulletin patent US5441118, its working head has many in the shape of a spiral and the steel wire of space interval, rotatably insert underground, steel wire can be held weeds root, then labourer firmly upwards extracts, so no doubt can more effectively weed a garden, but need the manual throw of labourer, then need larger power that related working head weeds root is extracted from earth, and need to manually weeds root be removed from working head, operation is still relatively required great effort like this, easy not.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of Weeding tool of clearing up conveniently, not affecting working head work.

The present invention solves the technical scheme that prior art problem adopts: a kind of Weeding tool, be used for removing weeds, it comprises the power source for power is provided, connection power source the longitudinally output shaft of Axis Extension, the working head being connected with output shaft, working head can rotate around longitudinal axis, Weeding tool also comprises the assembly of peeling off that can be subject to working head driving, in the time peeling off assembly and be positioned at primary importance, working head rotates around the first direction of rotation, peels off assembly and not driven by working head; In the time peeling off assembly and be positioned at the second place, working head, around the direction rotation contrary with the first direction of rotation, is peeled off assembly and not driven by working head.

Preferably, in the time peeling off the position of assembly between primary importance and the second place, working head drives peels off assembly motion.

Preferably, working head comprises the spire extending spirally along axis, when working head and spire wherein an end contacts time, peel off assembly in primary importance; In the time that working head contacts with the other end of spire, peel off assembly in the second place.

Preferably, Weeding tool comprises the sleeve that holds output shaft, is provided with the first gear cover and the second gear cover between sleeve and output shaft along axis direction compartment of terrain, and the first gear cover and the second gear cover can limit peels off assembly moving along axis direction.

Preferably, peel off assembly comprise between the first gear cover and the second gear overlap around axle sleeve, be socketed between sleeve and output shaft around axle sleeve, between axle sleeve and the first gear cover, be provided with the first elastic component, between axle sleeve and the second gear cover, be provided with the second elastic component, the first elastic component and the second elastic component can make respectively to peel off assembly and spire keeps in touch.

Preferably, peel off assembly and comprise and the sliding part being fixedly connected with around axle sleeve, sliding part is positioned on the surface of sleeve and moves along axis.

Preferably, have the longitudinally chute of Axis Extension on the surface of sleeve, the bearing pin one end that also can move along chute through chute connects sliding part, and the other end connects around axle sleeve.

Preferably, the length of chute is greater than or equal to the distance between primary importance and the second place.

Preferably, there is the cannelure around longitudinal axis around the waist of axle sleeve, on sliding part, there is perforation, bearing pin through perforation with cannelure by sliding part be connected around axle sleeve.

Preferably, peel off assembly and also comprise the stripper contacting with working head, stripper is fixedly connected with by connecting rod with sliding part.

Compared with prior art, beneficial effect of the present invention is: peel off assembly in the time of primary importance or the second place, working head still can keep rotating, and is not subject to working head driving, and avoids the work to working head to impact and peel off assembly.

Brief description of the drawings

Above-described object of the present invention, technical scheme and beneficial effect can, by the detailed description that can realize specific embodiments of the invention below, be described and clearly acquisition simultaneously by reference to the accompanying drawings.

Identical label in accompanying drawing and specification and symbol are for representing element identical or that be equal to.

Fig. 1 is the schematic diagram of the Weeding tool of one embodiment of the invention.

Fig. 2 is the generalized section along A-A line of the Weeding tool shown in Fig. 1.

Fig. 3 is the A part enlarged diagram of the Weeding tool shown in Fig. 2.

Fig. 4 is the B part enlarged diagram of the Weeding tool shown in Fig. 2.

Fig. 5 is the enlarged diagram of the power end of the Weeding tool shown in Fig. 1.

Fig. 6 is the schematic diagram of the power end of the Weeding tool of second embodiment of the invention.

Fig. 7 is the enlarged diagram of the working end of the Weeding tool shown in Fig. 1.

Fig. 8 is the front view of the working head of the Weeding tool shown in Fig. 1.

Fig. 9 is the schematic diagram of peeling off assembly of the Weeding tool shown in Fig. 1.

Figure 10 is the schematic diagram of peeling off assembly of the Weeding tool of third embodiment of the invention.

Figure 11 is the schematic diagram of peeling off assembly of the Weeding tool of fourth embodiment of the invention.

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

Figure 13 is the exploded perspective view of peeling off assembly of the Weeding tool of fourth embodiment of the invention.

Figure 14 is the schematic diagram that part sleeve and sliding part are removed in the region, working end of the Weeding tool shown in Fig. 1.

Figure 15 is the schematic diagram that part sleeve and sliding part are removed in the region, working end of the Weeding tool of fifth embodiment of the invention.

Figure 16 is the schematic diagram that part sleeve is removed in the first gear cover region of the Weeding tool shown in Fig. 1.

Figure 17 is the schematic diagram that the working head of the Weeding tool shown in Fig. 1 turns clockwise.

Figure 18 is the schematic diagram that the working head of the Weeding tool shown in Fig. 1 is rotated counterclockwise.

Figure 19 is the schematic diagram of peeling off assembly and reach primary importance of the Weeding tool shown in Fig. 1.

Figure 20 is the schematic diagram of peeling off assembly and reach the second place of the Weeding tool shown in Fig. 1.

1, Weeding tool 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, the first gear cover 27, the second gear cover 28, the first elastic component

29, the 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, the first bearing pin

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

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

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

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

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

L, pitch S, ground

Embodiment

About detailed description of the present invention and technology contents, coordinate brief description of the drawings as follows, but appended accompanying drawing only provide reference and explanation, is not used for the present invention to be limited.

Shown in Fig. 4, Weeding tool 1 is longitudinally and extends, and it comprises the sleeve 2 that extends along this longitudinally, for providing the power source 4 of power and for capturing the working head 5 of weeds.The inside of sleeve 2 has spatial accommodation 21, and the cross section of sleeve 2 can be the shapes such as circular or square or triangle.In the spatial accommodation 21 of sleeve 2, have output shaft 3, sleeve 2 is socketed on output shaft 3.Output shaft 3 has longitudinal axis 30, and the bearing of trend of this axis 30 is consistent with the longitudinally of Weeding tool 1, the central axes of axis 30 and sleeve 2.Output shaft 3 can rotate around this axis 30, and it comprises being rotated in a clockwise direction or rotating in the counterclockwise direction around axis 30 around axis 30 of selectively operation.One end of output shaft 3 is power end 31, and the other end is working end 32, and power end 31 is for connecting power source 4, and working end 32 is for connecting working head 5.

Please refer to shown in Fig. 5, there is bearing 23 at sleeve 2 near the end of power end 31 one end, 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 fit, makes so not produce relative movement between the two.Certainly bearing 23 and sleeve 2 can also adopt flat side to be connected or other the are common mode that is fixedly connected with in other embodiments.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 be 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 be subject to the impact of bearing 23.But bearing 23 can move radially along sleeve 2 by restricted power end 31 again, so keep the stable duty of power end 31, play the effect of supporting motive force end 31.Power end 31 can be that common sphere ball contacts cooperation with dead eye 231.As shown in Figure 2, comprise equally bearing 24 at sleeve 2 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 has dead eye can allow working end 32 or working head 5 pass.In the present embodiment, the working end 32 of output shaft 3 is connected with working head 5 through bearing 24.In other embodiments, working end 32 can be positioned at spatial accommodation 21, and working head 5 is connected with working end 32 through bearing 24.

As shown in Figure 5, comprise housing 41 for the power source 4 that power is provided, accommodate motor 42 in housing 41, motor 42 is for providing power.The power end 31 of motor 42 and output shaft 3 can transmission be connected, can be by transmission of power to output shaft 3 for its rotation.On power source 4, also have switch 43, switch 43 can be located on housing 41 so that operation.Switch 43 is for controlling the rotation of motor 42.In the present embodiment, switch 43 has at least three and controls gear, one grade is to control motor 42 to be rotated in the forward, output shaft 3 is turned clockwise around axis 30, one grade is to control motor 42 to counter-rotate, output shaft 3 is rotated counterclockwise around axis 30, and also having one grade is that motor 42 is stopped the rotation 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 respectively output shaft 3 and do clockwise rotating and rotating counterclockwise around axis 30.In addition, can also be provided with the speed adjusting gear (not shown) that regulates working head rotating speed for convenient on switch 43, the working head that adapts to different size dimensions to regulate is normally worked.

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 lithium battery bag.If while using Weeding tool 1 there is no enough electric power, power brick can be unloaded and charges.If Weeding tool 1 is combined with multiple power brick, can, the in the situation that of a power brick charging, be installed to Weeding tool 1 by another one power brick and carry out work, two power brick are exchanged upper/lower positions more when the time comes.Can realize like this Weeding tool 1 and work for a long time, very convenient and swift.Need certain rotating speed for making working head 5 reach suitable duty, the experiment proved that, the rotating speed of working head 5 goes to 400 per minute 200 and reaches proper working condition in turning.For making working head 5 maintain certain rotating speed, in the present embodiment, need the rated voltage of power brick more than 10 volts.For the consideration that uses power brick safety and avoid waste, the rated voltage of power brick is better 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 tool 1 can also be electrically connected with outside AC power, utilizes AC power to provide power to work to motor 42.

As shown in Figure 5, for convenience of operator's holding operation Weeding tool 1, on Weeding tool 1, also comprise the handle 7 for gripping.Handle 7 can be fixedly mounted on housing 41, and it has the holding part for gripping.Certainly, can also have other embodiment, handle can be arranged on sleeve 2, and sleeve 2 can be flexible to change length along axis 30, pleasant grip position when reaching work.

As shown in Figure 6, for coordinating the use of different operating environment, Weeding tool 1 can also be provided with extension rod 8.Extension rod 8 can be arranged on housing 41 or on sleeve 2, the extension axis of extension rod 8 can be parallel with the axis of output shaft 3 30 or not parallel, on extension rod 8, handle 7 can be set, so can conveniently make operator operate from afar to control Weeding tool 1 to weed a garden or control Weeding tool 1 and remove the weeds that are positioned at the region that the operator such as flower bed or narrow gap cannot stand.

As shown in Fig. 7 to Fig. 8, working head 5 comprises connector portions 51 and spire 52.Connector portions 51 can be fixedly connected on working end 32.Be fixedly connected with and can comprise other common connected modes such as electric welding.Can keep like this rotatablely moving of working head 5 to keep synchronous consistent with rotatablely moving of output shaft 3.In the present embodiment, connector portions 51 is roughly 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 being fixed working end 32 with the connector portions 51 of working head 5, for example working end 32 is all designed to have concaveconvex structure with connector portions 51, its socket is coordinated, or utilize lock member by modes such as both are fixed.

The spire 52 of working head 5 is that one is connected with connector portions 51, or is fixedly connected with in other common modes such as welding.In the present embodiment, spire 52 is processed into spirality by steel wire, and it extends spirally along axis 30.In the present embodiment, for making weeding reach reasonable effect, the inner diameter d of steel wire itself is roughly 6 millimeter.The end, one end 53 of steel wire is fixedly attached to connector portions 51, and the other end of steel wire is sharpened to be processed, and forms and has rigidity inclined-plane and sharp-pointed sharp tip 54, makes spire 52 can enter comparatively easily ground.The radius of spin of spire 52 is fixed, therefore roughly cylindrical structure of spire 52.In the present embodiment, the spiral outer diameter D 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 radius size progressively changes, and the shape of spire 52 is roughly conical or inverted taper shape like this.In the present embodiment, between the spiral of spire 52, there is a constant pitch, instead of nonseptate together adjacent, so can make spire 52 pierce ground more convenient easily.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 materials that the hardness such as stainless steel, carbon steel is larger.Ensure that like this spire 52 can not damage in the course of the work easily.In normal work, power source 4 can make through output shaft 3 ground that pierces that working head 5 rotates, and spire 52 surrounds weeds root in rotary course, and then working head 5 is pulled back on ground.Again the weeds and the earth that invest working head 5 are removed.

As shown in Figure 9, Weeding tool 1 also comprises and peels off assembly 6.Peel off assembly 6 and be positioned at the working end 32 near output shaft 3.Peel off assembly 6 and can be subject to rotatablely moving of described working head 5 drive and make Linear-moving along axis 30 directions, it is for clearing up and depart from working head 5 being attached to earth on working head 5 or weeds.Peel off that assembly 6 mainly comprises sliding part 61, stripper 62, connecting rod 63 and around axle sleeve 64.In 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.As shown in figure 14, in the spatial accommodation 21 of sleeve 2, be also provided with around axle sleeve 64, be arranged between output shaft 3 and sleeve 2 around axle sleeve 64, and between bearing 23 and bearing 24.Be socketed on output shaft 3 around axle sleeve 64, its central authorities are provided with through hole 641 along axis 30 directions, can allow output shaft 3 pass.There is certain length around axle sleeve 64 along axis 30 directions.Have around the cannelure 642 of output shaft 3 axis 30 at the side waist 643 around axle sleeve 64.In the present embodiment, cannelure 642 caves inward and has certain degree of depth.The width of cannelure 642 roughly can hold the width of bolt or bearing pin.Cannelure 642 is connected with the inner surface 201 of sleeve 2.The effect that cannelure 642 is set is to make and other element mechanical connections convenient around axle sleeve 64.

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

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

As shown in figure 14, have perforation 611 on sliding part 61, perforation 611 is arranged on along in two relative directions radially of axis 30.Perforation 611 has certain length, and in the time that sliding part 61 is socketed on sleeve 2, the chute 25 on end and the sleeve 2 of perforation 611 is communicated with; Another end of perforation 611 is communicated with external environment condition through sliding part 61.So, cannelure 642, groove 25 and perforation 611 are one connection.Can pass successively the perforation 611 sliding part 61, the chute 25 on sleeve 2 and the cannelure 642 on axle sleeve 64 by for example bearing pin 65 of fixture from external environment condition, bearing pin 65 is fixedly connected with respectively around axle sleeve 64 and sliding part 61, and it is also subject to certain position-limiting action of chute 25 simultaneously.When sliding part 61 is subject to the driving of power, sliding part 61 can drive bearing pin 65 in chute 25, to move up along two of axis 30 relative sides, bearing pin 65 drives the interior movement of spatial accommodation 21 at sleeve 2 along axis 30 directions around axle sleeve 64 simultaneously, and sliding part 61 moves along axis 30 directions on the surface of sleeve 2.Owing to there being chute 25 to there is certain length, bearing pin 65 is moved and plays restriction, make sliding part 61 and be to be also subject to certain limitation around axle sleeve 64 along the movement of axis 30 directions.Certainly can adopt other fixture, for example in other embodiments, can in cannelure 642 and perforation 611, screw thread be set, adopt bolt thread to connect cannelure 642, chute 25 and perforation 611.

As shown in Fig. 9 to Figure 13, connecting rod 63 is arranged between sliding part 61 and stripper 62.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 its one end is fixedly connected with sliding part 61, and the other end is fixedly connected with 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 greater than the spiral outer diameter D of spire 52 to the distance of axis 30, 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 such as, by other common modes that is fixedly connected with, the modes such as screw locking.

The stripper 62 of peeling off assembly 6 is positioned near the spire 52 of working head 5.As shown in Fig. 9 to Figure 13, stripper 62 roughly has working face 620, and this working face 620 is approximately perpendicular to the axis 30 of output shaft 3.Stripper 62 has the auxiliary section 621 coordinating 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, the arc that its profile is 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 through time the surface of spire 52 and the profile of auxiliary section 621 maintenance coordinate.In another embodiment of the present invention, as shown in Figure 11 to Figure 13, auxiliary section 621 is also roughly semicircular breach, and its profile is the spirality of extending along axis 30 directions.Meanwhile, on its spiral profile, there is tooth-shape structure 626.The breach that auxiliary section 621 forms can pass by holding portion spire 52 equally.Like this, make the profile of auxiliary section 621 and the Surface Contact area of spire 52 more, simultaneously tooth-shape structure 626 make stripper 62 to peel off the effects of earth and weeds from spire 52 better.Certainly, can also have other embodiment, as shown in figure 10, stripper 62 can also be for having the flat board of arc notch.In a word, the object of stripper 62 is to make spire 52 contact with stripper 62 and produce along the frictional force of axis 30 directions in the process of rotation.It should be noted that as shown in Figure 17 and Figure 18, the both sides that stripper 62 is positioned at working face 620 have respectively the first side 622 and the second side 623 on the other side.Wherein, the first side 622 towards 54, the second sides 623, tip of working head 5 towards power source 4.In normal work, in the time that spire 52 rotates towards a direction, the first side 622 of stripper 62 and the Surface Contact of spire 52, and produce the first make contact 624 being positioned on the first side 622; In the time that spire 52 rotates towards contrary other direction, the Surface Contact of the second side 623 and spire 52, and produce the second contact point 625 being positioned on the second side 623.Not on axis 30, but there is offset distance apart from axis 30 respectively in first make contact 624 and the second contact point 625, but first make contact 624 and the second contact point 625 are symmetrical arranged with respect to axis 30.

The spire 52 of working head 5 extends spirally along axis 30 directions owing to being designed to, therefore spire 52 has the hand of spiral around axis 30.In the present embodiment, its hand of spiral is to point to as shown in Figure 1 the clockwise direction of working head 5 along axis 30 from power source 4, and certainly at other embodiment, spire 52 can be designed to the hand of spiral for counterclockwise.In the present embodiment, when output shaft 3 is in the time that its hand of spiral turn clockwise, the spire 52 of working head 5 also turns clockwise.Because spire 52 turns clockwise, using spire 52 as reference system, stripper 62 is rotated counterclockwise with respect to spire 52.As shown in figure 17, now the first side 622 of stripper 62 contacts with the helical surface of spire 52, and produce frictional force promote stripper 62 move 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, when spire 52 is rotated counterclockwise, using spire 52 as reference system, stripper 62 is equivalent to do clockwise motion.As shown in figure 18, now 623 of second sides of stripper 62 contact with the helical surface of spire 52, and produce frictional force promote stripper 62 along the illustrated direction of arrow tip 54 directions along axis 30 to spire 52 move.And stripper 62 is fixedly connected with by connecting rod 63 with sliding part 61, therefore the athletic meeting of stripper 62 drives and wholely peels off that assembly 6 is done along axis 30 to working head 5 directions or to the rectilinear motion of power source 4 directions.

As shown in Figure 17 and Figure 19, in the time that spire 52 turns clockwise, stripper 62 is subject to the effect of frictional force and moves to the direction of power source 4 along axis 30 constantly.After mobile certain distance, in the time that stripper 62 moves to the connector portions 51 of close working head 5, the end 53 at spire 52 that contacts of spire 52 and stripper 62, now spire 52 does not produce and continues to promote its frictional force of advancing stripper 62, and therefore stripper 62 is limited in motion in very little interval range.Therefore the rectilinear motion of stripper 62 stops, spire 52 is turned clockwise by power source 4 drivings still can, and the position of now peeling off assembly 6 places is primary importance 11 as shown in figure 19.As shown in Figure 18 and Figure 20, in the time that spire 52 is rotated counterclockwise, stripper 62 moves to tip 54 directions of working head 5.In the time that stripper 62 moves to the tip 54 of working head 5, the tip 54 at spire 52 that contacts of spire 52 and stripper 62, now spire 52 does not produce and continues to promote its frictional force of advancing stripper 62, and therefore stripper 62 is limited in motion in very little interval range.Therefore the rectilinear motion of stripper 62 stops, spire 52 still can be rotated counterclockwise, and the position of now peeling off assembly 6 places is the second place 12 as shown in figure 20.And peel off assembly 62 between primary importance 11 and the second place 12 time, working head 5 produces frictional force to stripper 62, drives stripper 62 to move.In the present embodiment, the distance between primary importance 11 and the second place 12 is 10 centimetres, such distance setting make working head 5 pierce ground form hole not too large too dark, when can extracting weeds, avoid soil reclamation to injure.It should be noted that distance between primary importance 11 and the second place 12 is to match with the length of the chute 25 of sleeve 2.

As shown in Figure 1 to Figure 4 and shown in Figure 16, also there is the first gear cover 26 and the second gear cover 27, the first gears covers 26 and the second gear cover 27 and can play restriction and peel off the effect that assembly 6 moves in compartment of terrain along axis 30 directions the spatial accommodation 21 of sleeve 2 is interior.The first gear cover 26 and the second gear cover 27 are also arranged at respectively between sleeve 2 and output shaft 3.The first gear cover 26 and the second gear cover 27 lay respectively at around the both sides of axle sleeve 64, and between bearing 23 and bearing 24.As shown in Fig. 4 and Figure 16, the central authorities of the first gear cover 26 have first perforation 263 that can allow output shaft 3 pass.With similar around axle sleeve 64, the waist of the first gear cover 26 has cannelure 261, and cannelure 261 arranges around axis 30.The width of cannelure 261 can hold the width of bearing pin or bolt or other fixtures.In the place corresponding with cannelure 261, the surface of sleeve 2, locating hole 20 is set, cannelure 261 and locating hole 20 are connected.The first bearing pin 262 can be rear fixing through locating hole 20 and cannelure 261 successively.Make like this first gear cover 26 and relatively-stationary coupling together in sleeve 2 positions, the first gear cover 26 cannot move along axis 30 directions.The situation of the second gear cover 27 and the first gear cover 26 is similar, is fixedly connected with equally by bearing pin with sleeve 2, just does not add to repeat at this.Certainly, the invention is not restricted to bearing pin and be fixedly connected with the mode of gear cover and sleeve, can also coordinate by concaveconvex structure clamping, other the mode that is fixedly connected with such as screw locking.

As shown in Figure 2, at the first gear cover 26 and around arranging between axle sleeve 64 that the first elastic component 28, the first elastic components 28 arrange around output shaft 3 and between output shaft 3 and sleeve 2.The first gear cover 26 and the distance between axle sleeve 64 are slightly larger than the drift of the first elastic component 28.In the present embodiment, the two ends of the first elastic component 28 all belong to free end.When make distance between the two reduce towards the first gear cover 26 motions around axle sleeve 64, one end of the first elastic component 28 can be connected to the first gear cover 26, and the other end can be connected to around axle sleeve 64.When the first elastic component 28 is when compressed, it can provide flexible restoring force to around axle sleeve 64.Situation is similar with it, and the second elastic component 29 is arranged on the second gear cover 27 and between axle sleeve 64, and equally between output shaft 3 and sleeve 2.The two ends of the second elastic component 29 also all belong to free end, and when make distance between the two reduce towards the second gear cover 27 motions around axle sleeve 64, its one end is connected to the 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 gear cover in one end, and the other end is fixedly attached to around axle sleeve 64; Or one end of elastic component belongs to free end, the other end is fixedly attached on corresponding element.The effect of the first elastic component 28 is as follows: in the time that stripper 62 is positioned at primary importance 11, the distance between axle sleeve 64 and the first gear cover 26 is less than the drift of the first elastic component 28, therefore the first elastic component 28 is in compressive state.The thrust that the first elastic component 28 can opposing connection axle sleeves 64 produces along axis 30 to most advanced and sophisticated 54 directions of working head 5, keeps in touch stripper 62 and the spire 52 of working head 5, avoids occurring the just in time situation in the space of the spiral spacer in spire 52 of stripper 62.In like manner, the effect of the second elastic component 29 is in the time that stripper 62 is positioned at the second place 12, produces the thrust along 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 in detail the course of work of Weeding tool 1 below.As shown in Figure 19 and Figure 20, first make working head 5 aim at weeds and be placed on ground S above, now, the whole assembly 6 of peeling off also rest on the ground.Then start power source 4, by output shaft 3, the 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 moves up to the direction of power source 4 along axis 30 owing to being subject to the frictional force of spire 52.In whole process, stripper 62 all rest on the ground always.When whole spire 52 submerge underground after, stripper 62 is in primary importance 11.Now, switch 43 is controlled working head 5 and is stopped the rotation, and spire 52 has captured weeds root, then can catch easily handle or sleeve 2 that spire 52 is extracted to ground, and the weeds root so originally locating below ground level is extracted ground very easily.

Then, again start power source 4, the spire 52 that makes working head 5 rotates against the hand of spiral, moves earthward along the direction at the tip 54 of the working head 5 of axis 30 because stripper 62 is subject to the frictional force of spire 52.In this moving process, stripper 62 promotes to be attached to earth and weeds on spire 52, and earth and weeds are separated from from spire 52.In the time that stripper 62 moves to the second place 12, all earth and weeds that are attached on spire 52 are all stripped from.Like this, without manpower can dispose invest on spire 52 earth and weeds, saved manpower, and only needed Push switch 43 to control, easy to operate.

Claims (10)

1. a Weeding tool, be used for removing weeds, it comprises output shaft, longitudinally Axis Extension of described output shaft, the working head being connected with described output shaft, described working head can rotate around described axis, it is characterized in that: described Weeding tool also comprises and driven by described working head and along the linearly moving assembly of peeling off of described axis, described working head comprises the spire extending spirally along described axis, the described assembly of peeling off comprises stripper, described stripper contacts with described spire and produces the frictional force along described axis direction, when described working head is in the time that the first direction of rotation is rotated, the described assembly of peeling off moves to primary importance and is limited near described primary importance, when described working head is during around the direction rotation contrary with described the first direction of rotation, described in peel off assembly and move to the second place and be limited near the described second place.

2. Weeding tool according to claim 1, is characterized in that: in the time peeling off the position of assembly between described primary importance and the described second place, described in described working head drives, peel off assembly motion.

3. Weeding tool according to claim 2, is characterized in that: described working head comprises the spire extending spirally along described axis, when described peel off assembly and described spire wherein an end contacts time, described in peel off assembly in described primary importance; When described when peeling off assembly and contacting with the other end of described spire, described in peel off assembly in the described second place.

4. Weeding tool according to claim 3, it is characterized in that: described Weeding tool comprises the sleeve that holds described output shaft, between described sleeve and described output shaft, be provided with the first gear cover and the second gear cover along described axis direction compartment of terrain, described in described the first gear cover can limit with described the second gear cover, peel off assembly moving along described axis direction.

5. Weeding tool according to claim 4, it is characterized in that: described in peel off assembly comprise between described the first gear cover and described the second gear overlap around axle sleeve, describedly be socketed between described sleeve and described output shaft around axle sleeve, describedly between axle sleeve and described the first gear cover, be provided with the first elastic component, describedly between axle sleeve and described the second gear cover, be provided with the second elastic component, described in described the first elastic component and described the second elastic component can make respectively, peel off assembly and described spire keeps in touch.

6. Weeding tool according to claim 5, is characterized in that: described in peel off assembly and comprise and the described sliding part being fixedly connected with around axle sleeve, described sliding part is positioned on the surface of described sleeve and moves along described longitudinal axis.

7. Weeding tool according to claim 6, is characterized in that: described sleeve has the chute extending along described longitudinal axis, and the bearing pin one end that also can move along described chute through described chute connects described sliding part, and the other end connects described around axle sleeve.

8. Weeding tool according to claim 7, is characterized in that: the length of described chute is greater than or equal to the distance between described primary importance and the described second place.

9. Weeding tool according to claim 7, it is characterized in that: described have the cannelure around described longitudinal axis around axle sleeve, on described sliding part, have perforation, described bearing pin is connected with described described sliding part with described cannelure through described perforation around axle sleeve.

10. Weeding tool according to claim 7, is characterized in that: described in peel off assembly and also comprise the stripper contacting with described spire, described stripper is fixedly connected with by connecting rod with described sliding part.