CN104663113A - Rotating grass trimmer - Google Patents
Rotating grass trimmer Download PDFInfo
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- CN104663113A CN104663113A CN201310617994.7A CN201310617994A CN104663113A CN 104663113 A CN104663113 A CN 104663113A CN 201310617994 A CN201310617994 A CN 201310617994A CN 104663113 A CN104663113 A CN 104663113A
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- grass
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- line box
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Abstract
The invention discloses a rotating grass trimmer which comprises a shell, a motor, a wire box, a length detection element, an electromagnet and a control element. A wire reel and a pay-off shifting fork are arranged in the wire box, a trimmer line is wound on the wire reel, one portion of the trimmer line penetrates the wire box and has a rated length outside the wire box, whether pay-off is performed or not is controlled according to the fact whether the penetrating portion of the trimmer line exceeds the rated length or not when the grass trimmer starts rotating, the length of the trimmer line is judged by detecting centrifugal force generated by the penetrating portion of the trimmer line in the whole process, pay-off control is realized by the electronic control element, gratuitous waste of the trimmer line can be decreased, and operation of a user can be greatly facilitated.
Description
Technical field
The present invention relates to a kind of rotary mower, particularly relate to a kind of rotary mower of the rope length that can automatically control to beat the grass.
Background technology
Mower of the prior art, mostly be rotary mower, be exactly drive a line box to rotate by motor specifically, line box connects flexibility to beat the grass rope, this rope of beating the grass is followed the rotation of line box and is carried out cutting to grass highly different on lawn and arranges, but, because work normality is ceaselessly grazing, beat the grass rope consumption quickly, at first after rope of beating the grass consumes, general is all manually in line box, extract rope of more beating the grass, and obviously like this wastes time and energy, so need a kind of technology that can make the automatic unwrapping wire of mower in Power Tools Industries badly.
Application number is in the utility model patent of 201220038260.4, and disclose a kind of novel rotary mower, this mower can realize automatic unwrapping wire.Its principle is: reel rope of beating the grass on wire spool, the top of wire spool is provided with concentric inner ratch gear and outer ratchet ring, one unwrapping wire cage knob is pressed in the top of wire spool, unwrapping wire cage knob is provided with the first triangle hook and the second triangle hook, one end of unwrapping wire cage knob is connected with spring, under normal condition, the first triangle hook engages with outer ratchet ring, and the second triangle hook engages with inner ratch gear.After user presses power switch, wire spool is followed motor and is slowly run, and wire spool synchronous axial system followed by rope of now beating the grass, and therebetween without relative motion, the length that rope of therefore beating the grass exposes is certain; And when rotating speed is more and more faster, the centrifugal force that unwrapping wire cage knob is subject to increases, it is made to start Compress Spring, at this moment the first triangle hook and the second triangle hook depart from gear or gear ring gradually, when just all departing from, wire spool and line box no longer synchronous axial system, now therebetween " skidding ", such wire spool will release one section of rope of beating the grass; In like manner, the rotary centrifugal force that also there is rope of beating the grass when mower gets back to stopped status from the state of High Rotation Speed crosses over a critical value, makes to produce between wire spool and line box " skidding " and releases one section again and beat the grass and restrict.This technical scheme, by the change of rotary centrifugal force during each switching on and shutting down, produces speed discrepancy by mechanical means between wire spool and line box, thus reaches the object of automatic unwrapping wire.
Adopting technique scheme, when starting shooting or shut down, all can automatically discharge rope of beating the grass.But really can not solve the problem that " as required " discharges rope of beating the grass like this: even if the length of rope of sometimes beating the grass is enough, along with the open and close machine of mower, inevitable meeting again releases one section of rope of beating the grass more, causes unnecessary waste; And sometimes need many some ropes of beating the grass of release, can at every turn the releasing of open and close machine length again not, user can only multiple switching machine, and the overall length of release is met the requirements.Be no matter the angle from saving or angle easy to use, this technical scheme all also exists certain problem.
Summary of the invention
In order to overcome the defect of prior art, the object of this invention is to provide a kind of rotary mower, comprising housing; Motor, is located in described housing; Line box, its internal fixtion is provided with locating dowel, and the output shaft of described motor is in transmission connection by described locating dowel and described line box; Wire spool is provided with in described line box, be sheathed in described locating dowel movably, the top of described wire spool is provided with concentric inner ratch gear and outer ratchet ring, described wire spool is wound with rope of beating the grass, described beat the grass rope one end pass described line box, described in beat the grass rope pass part there is a nominal length; Unwrapping wire shift fork, it offers a sliding tray, described unwrapping wire shift fork is arranged in described locating dowel by described sliding tray and also can slides along the bearing of trend of described sliding tray, the bottom surface of described unwrapping wire shift fork is affixed on the top of described wire spool, one end of described unwrapping wire shift fork bottom surface is provided with protruding fixture block, and described fixture block can be meshed with described inner ratch gear or described outer ratchet ring respectively when sliding with described unwrapping wire shift fork; Described rotary mower also comprises: length detection element, and whether the length passing part for rope of beating the grass described in detecting is greater than described nominal length, and exports corresponding signal; Electromagnet, can produce the electromagnetic force that described unwrapping wire shift fork can be driven to slidably reciprocate along the bearing of trend of its sliding tray; Control element, for receiving the described signal that described length detection element exports, and controls described electromagnet according to described signal and produces described electromagnetic force.
Preferably, described rotary mower is provided with the TRT for generation of electric energy needed for described control element work.
Further preferably, described TRT comprises the permanent magnet be located on described housing, is located at the coil described line box also being followed the rotation of described line box, described TRT connects one for storing the capacitor of the electric energy that described TRT produces, and described capacitor is powered to described control element.
Preferably, described line box offers wire hole, described in beat the grass rope one end pass from described wire hole.
Preferably, when the length passing part of described rope of beating the grass is greater than described nominal length, described length detection element exports the first signal, and described control element does not carry out any action after receiving described first signal; When the length passing part of described rope of beating the grass is less than or equal to described nominal length, described length detection element exports secondary signal, after described control element receives described secondary signal, control described electromagnet generation electromagnetic force and drive described unwrapping wire shift fork to slidably reciprocate once along described sliding tray.
Further preferably, described length detection element comprise be fixedly installed the first contact, can or the second wafer that be separated in electrical contact with described first contact, when rope of beating the grass described in described line tape is dynamic rotates, if beat the grass, the length passing part of rope is greater than described nominal length, the rotary centrifugal force passing part of described rope of beating the grass oppresses described the second wafer makes it in electrical contact with described first contact, and described state in electrical contact is as described first signal output; If described in beat the grass rope pass part length be less than or equal to described nominal length, described the second wafer keeps being separated with described first contact, and described released state exports as described secondary signal.
Further preferably, after described control element receives described secondary signal, described fixture block first departs from described outer ratchet ring, engages with described inner ratch gear; Depart from described inner ratch gear again, again engage with described outer ratchet ring.
The rotary mower of the present invention controls the motion of unwrapping wire shift fork by electromagnet, control by length detection element the length passing part of restricting of beating the grass simultaneously, whole process is intelligent, and waste and the user that can solve rope of beating the grass use inconvenient two large problems simultaneously.
Accompanying drawing explanation
Accompanying drawing 1 is the phantom of the rotary mower of the present invention;
Accompanying drawing 2 (a) is the first vertical view of A-A section in accompanying drawing 1;
Accompanying drawing 2 (b) is the second vertical view of A-A section in accompanying drawing 1;
Accompanying drawing 3 is the partial enlarged drawing of B-B part in accompanying drawing 1;
Accompanying drawing 4 is that the rotary mower of the present invention is for controlling the circuit theory diagrams of unwrapping wire.
In accompanying drawing:
1-housing, 2-motor, 3-line box, 4-wire spool, 5-unwrapping wire shift fork, 6-is beaten the grass rope, 7-length detection element, 8-electromagnet, 9-control element, 10-TRT, 11-capacitor;
21-output shaft;
31-locating dowel, 32-wire hole;
41-inner ratch gear, the outer ratchet ring of 42-;
51-fixture block;
71-first contact, 72-the second wafer, 73-pressure block;
101-permanent magnet, 102-coil.
Embodiment
Below in conjunction with accompanying drawing being preferred embodiment described in detail to the rotary mower of the present invention.
Accompanying drawing 1-4 depicts the structure of the rotary mower of the present invention, comprise housing 1, the motor 2 be located in housing 1, motor 2 has output shaft 21, output shaft 21 and a line box 3 are in transmission connection, line box 3 internal fixtion is provided with locating dowel 31, and output shaft 21 can be connected by interference fit with locating dowel 31.Be provided with wire spool 4, unwrapping wire shift fork 5 in line box 3, wherein wire spool 4 is set in locating dowel 31 movably, and the top of wire spool 4 is provided with concentric inner ratch gear 41 and outer ratchet ring 42, and the profile of tooth of the two is preferably unified profile of tooth; Unwrapping wire shift fork 5 offers sliding tray, pass through so that locating dowel 31 can be made, and can freely produce relative sliding therebetween and be advisable, unwrapping wire shift fork 5 passes locating dowel 31 and is placed in the top of wire spool 4, be provided with protruding fixture block 51 in one end of the bottom surface of unwrapping wire shift fork 5 simultaneously, this fixture block 51 can engage with inner ratch gear 41, outer ratchet ring 51 respectively, when unwrapping wire shift fork 5 along its sliding tray bearing of trend slide time, its fixture block 51 can slide between inner ratch gear 41 and outer ratchet ring 51, and engages with them respectively.When wire spool 4 under normal circumstances, can follow and rely on unwrapping wire shift fork 5 and line box 3 to be connected as a single entity, synchronous axial system; And when unwrapping wire shift fork 5 slides, wire spool 4 no longer with line box 3 synchronous axial system, a rotation phase can be produced therebetween poor.
The circumferential side wall of wire spool 4 is wound with rope 6 of beating the grass, and its one end passes line box 3, and it passes mode can be that a wire hole 32 offered by online box 3, and the one end of rope 6 of beating the grass passes from wire hole 32; When line box 3 rotates, wire spool 4 can be followed line box 3 and be rotated, and rope 6 of beating the grass also can rotate thereupon, and owing to not producing relative sliding between wire spool 4 and line box 3, the length that outlet box 3 worn by rope 6 of therefore beating the grass is constant all the time; For rope 6 of beating the grass, its part of wearing outlet box 3 has a nominal length, is also minimum length of beating the grass, if be less than this length, does not then have good effect of beating the grass, need to carry out unwrapping wire operation.
Also be provided with a length detection element 7 in online box 3, this length detection element 7 can pass the centrifugal force size that produces when rotated of part according to rope 6 of beating the grass, and exports different signals.In the present embodiment, length detection element 7 at least comprises the first contact 71, the second wafer 72.First contact 71, the second wafer 72 can adopt the metal contact piece that electric conductivity is good, wherein the first contact is fixedly installed in online box 3, the second wafer 72 needs to have certain elasticity, can be in electrical contact with the first contact 71 or be separated, when not receiving any External force interference, the two is separated, the second wafer 72 contacts with beating the grass to restrict, and can by beat the grass rope pass part produce centrifugal force oppress, here for the ease of accurately controlling the stressed of the second wafer 72, the second wafer 72 is also provided with pressure block 73, pressure block 73 is connected with the second wafer 72, and contact with rope 6 of beating the grass, specifically, through hole can be offered on pressure block 73, the rope 6 that makes to beat the grass can pass this through hole, only need to ensure when rope rotation of beating the grass is beaten the grass, the centrifugal force produced can driving pressure block 73, it is made to oppress the second wafer 72 gradually, when centrifugal force large to a certain extent time, the second wafer 72 can contact with the first contact 71.When the first contact 71 contacts with the second wafer 72, length detection element 7 is in channel status, and what now export is the first signal, otherwise when the two is separated, length detection element 7 is in off state, and what now export is secondary signal.
An electromagnet 8 is also provided with in online box 3, pulling force along its length or thrust can be produced, in the present embodiment, electromagnet 8 is arranged on unwrapping wire shift fork 5 one end away from fixture block 51, its length direction is identical with the bearing of trend of unwrapping wire shift fork 5 sliding tray, and therefore this electromagnet 8 can be used for the slip driving unwrapping wire shift fork 5.When electromagnet 8 drives unwrapping wire shift fork 5 to slidably reciprocate, also driving fixture block 51 is engaged back and forth between inner ratch gear 41 with outer ratchet ring 42 simultaneously.
The rotary mower of the present invention is also provided with control element 9, for connecting length detecting element 7 and electromagnet 8, is preferably pcb board here.When control element 9 detects that length detection element 7 exports the first signal, control element 9 does not produce any new action; When control element 9 detects that length detection element exports secondary signal, control element 9 controls electromagnet 8 and successively produces pulling force and thrust successively and put on unwrapping wire shift fork 5, also namely put on fixture block 51, concrete action is: first pull fixture block 51 that itself and outer ratchet ring 42 are departed from, engage with inner ratch gear 41, then promoting fixture block 51 makes itself and inner ratch gear 41 depart from, engage with outer ratchet ring 42, such unwrapping wire shift fork is actually and has carried out a slip of having a try, and forms complete cycle.
Due to the soft copy that the control elements such as pcb board are accurate, its rated voltage, obviously much smaller than the operating voltage of mower, therefore in the present embodiment, is also provided with a miniature TRT 10, for generation of the work energy needed for control element 9.As accompanying drawing 5 illustrates, the coil 102 that this TRT 10 comprises the permanent magnet 101 be fixed on housing 1, can rotate with line box 3, when coil 102 rotates, because it cut the line of magnetic induction of permanent magnet 101, induced-current will be produced in coil 102, this induced electricity fails to be convened for lack of a quorum and is stored in a capacitor 11, and capacitor 11 and control element 9 are electrically connected, for powering to control element 9.Control element, after obtaining electric energy supply, can receive the signal of length detection element 7 output and control electromagnet 8 action.
The rotary mower of the present invention is when stopped status; length detection element 7 is not owing to receiving the impact of extraneous centrifugal force; pressure block 73 does not oppress the second wafer 72; fixture block 51 engages with outer ratchet ring 42; assuming that now beat the grass, the partial-length that passes of rope 6 is greater than nominal length, as shown in accompanying drawing 2 (a).When user starts to start mower, the output shaft 21 of motor 2 starts to rotate, and is with moving-wire box 3 to rotate by locating dowel 31, and wire spool 4 due to the connection of unwrapping wire shift fork 5 synchronous axial system thereupon, and then driving rope 6 of beating the grass also to rotate thereupon, above-mentioned each parts are all geo-stationary between any two; Simultaneously, because the partial-length that passes of rope 6 of beating the grass is greater than nominal length, the centrifugal force produced when it rotates makes pressure block 73 be pressed onto by the second wafer 72 on first contact 71, now length detection element 7 exports the first signal, control element 9 does not produce new action, such unwrapping wire shift fork 5, wire spool 4, line box 3 are connected rotation, owing to there is no relative motion between them, rope 6 of therefore beating the grass to pass partial-length constant.
When beating the grass rope 6 after a period of operation, can produce wearing and tearing, its length passing part reduces gradually, and when being decreased to nominal length or lower than nominal length, the state of mower starts to switch to the situation shown in accompanying drawing 2 (b).Because rotary centrifugal force reduces, pressure block 73 and the second wafer 72 is made to cannot keep under control the first contact 71, the second wafer 72 and the first contact 71 depart from, length detection element 7 exports secondary signal, now control element 9 detects this change, control electromagnet 8 and produce electromagnetic force, pull successively, promote unwrapping wire shift fork 5: first pull fixture block 51, it is made to depart from outer ratchet ring 42, such wire spool 4 and line box 3 no longer synchronous axial system, fixture block 51 is drawn close with inner ratch gear 41 and is engaged subsequently, due to outer ratchet ring 42, between inner ratch gear 41, the number of teeth is identical, but there is the difference of phase angle.In the motion process of above-mentioned fixture block 51, fixture block 51 can force between outer ratchet ring 42, inner ratch gear 41 and produce relative motion, and after fixture block 51 engages with inner ratch gear 41, wire spool 4 and line box 3 again together with rotate; Then electromagnet promotes fixture block 51 again, makes it depart from inner ratch gear 41, draws close and engages subsequently with outer ratchet ring 42, and in like manner, this process also can produce a relative motion, and rope 6 of beating the grass can discharge again one section of new rope of beating the grass more.Above process is as one-period, and the length of the rope 6 of beating the grass that this cycle releases is determined by the number of teeth of outer ratchet ring 42, inner ratch gear 41.
After releasing new rope 6 of beating the grass, if the partial-length that passes of rope 6 of beating the grass is greater than nominal length, the rotary centrifugal force that pressure block 73 is subject to increases, and again oppress the first contact 71 with the second wafer 72 together and make it contact, length detection element 7 exports the first signal again; Control element 9 detects the first signal, so do not make new action, continues to keep fixture block 51 to be engaged on outer ratchet ring 42.If beat the grass, the partial-length that passes of rope 6 is still less than nominal length, length detection element exports or secondary signal, then control element 9 can control electromagnet and carries out once the above-mentioned unwrapping wire cycle again, until the length passing part of rope 6 of beating the grass is greater than nominal length.
Compared to prior art, the rotary mower of the present invention can carry out unwrapping wire according to the rope length of beating the grass passed automatically, has both decreased the consumption for no reason of rope of beating the grass, has made again whole operating process intelligent, alleviate the burden of user.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (8)
1. a rotary mower, comprises
Housing (1);
Motor (2), is located in described housing (1);
Line box (3), its internal fixtion is provided with locating dowel (31), and the output shaft (21) of described motor (2) is in transmission connection by described locating dowel (31) and described line box (3);
Be provided with in described line box (3)
Wire spool (4), be sheathed in described locating dowel (31) movably, the top of described wire spool (4) is provided with concentric inner ratch gear (41) and outer ratchet ring (42), described wire spool (4) is wound with rope (6) of beating the grass, described one end of beating the grass rope (6) passes described line box (3), described in beat the grass rope (6) pass part there is a nominal length;
Unwrapping wire shift fork (5), it offers a sliding tray, described unwrapping wire shift fork (5) is arranged in described locating dowel (31) by described sliding tray and above also can slides along the bearing of trend of described sliding tray, the bottom surface of described unwrapping wire shift fork (5) is affixed on the top of described wire spool (4), one end of described unwrapping wire shift fork (5) bottom surface is provided with protruding fixture block (51), and described fixture block (51) can be meshed with described inner ratch gear (41) or described outer ratchet ring (42) respectively when sliding with described unwrapping wire shift fork (5);
It is characterized in that, described rotary mower also comprises:
Length detection element (7), whether the length passing part for rope (6) of beating the grass described in detecting is greater than described nominal length, and exports corresponding signal;
Electromagnet (8), can produce the electromagnetic force that described unwrapping wire shift fork (5) can be driven to slidably reciprocate along the bearing of trend of its sliding tray;
Control element (9), for receiving the described signal that described length detection element (7) exports, and controls described electromagnet (8) according to described signal and produces described electromagnetic force.
2. rotary mower according to claim 1, is characterized in that: described rotary mower is provided with the TRT (10) for generation of the required electric energy of described control element (9) work.
3. rotary mower according to claim 2, it is characterized in that: described TRT (10) comprises the permanent magnet (101) be located on described housing (1), is located at the upper coil (102) also can followed described line box (3) and rotate of described line box (3), described TRT (10) connects one for storing the capacitor (11) of the electric energy that described TRT (10) produces, and described capacitor (11) is powered to described control element (9).
4. rotary mower according to claim 1, is characterized in that: described line box (3) offers wire hole (32), described in beat the grass one end of rope (6) pass from described wire hole (32).
5. rotary mower according to claim 1, it is characterized in that: when the length passing part of described rope (6) of beating the grass is greater than described nominal length, described fixture block (51) is meshed with described outer ratchet ring (42), described length detection element (7) exports the first signal, and described control element (9) does not carry out any action after receiving described first signal; When the length passing part of described rope (6) of beating the grass is less than or equal to described nominal length, described length detection element (7) exports secondary signal, after described control element (9) receives described secondary signal, control described electromagnet (8) generation electromagnetic force and drive described unwrapping wire shift fork (5) to slidably reciprocate once along described sliding tray.
6. rotary mower according to claim 5, it is characterized in that: described length detection element (7) comprises the first contact (71) be fixedly installed, can or the second wafer (72) that be separated in electrical contact with described first contact (71), when rope (6) of beating the grass described in described line box (3) drives rotates, if beat the grass, the length passing part of rope (6) is greater than described nominal length, the rotary centrifugal force passing part of described rope (6) of beating the grass oppresses described the second wafer (72) makes itself and described first contact (71) in electrical contact, described state in electrical contact exports as described first signal, if described in beat the grass rope (6) pass part length be less than or equal to described nominal length, described the second wafer (72) keeps being separated with described first contact (71), and described released state exports as described secondary signal.
7. rotary mower according to claim 5, it is characterized in that: after described control element (9) receives described secondary signal, described fixture block (51) first departs from described outer ratchet ring (42), engages with described inner ratch gear (41); Depart from described inner ratch gear (41) again, again engage with described outer ratchet ring (42).
8. rotary mower according to claim 1, is characterized in that: described inner ratch gear (41) is identical with the number of teeth of described outer ratchet ring (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310617994.7A CN104663113B (en) | 2013-11-28 | 2013-11-28 | A kind of rotary grass-mowing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310617994.7A CN104663113B (en) | 2013-11-28 | 2013-11-28 | A kind of rotary grass-mowing machine |
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| Publication Number | Publication Date |
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| CN104663113A true CN104663113A (en) | 2015-06-03 |
| CN104663113B CN104663113B (en) | 2016-08-31 |
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| CN201310617994.7A Active CN104663113B (en) | 2013-11-28 | 2013-11-28 | A kind of rotary grass-mowing machine |
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| CN106416588A (en) * | 2015-08-05 | 2017-02-22 | 南京德朔实业有限公司 | Grass trimmer and control method thereof |
| CN107926265A (en) * | 2017-07-31 | 2018-04-20 | 上海交通大学 | A kind of fast automatic outlet moving head mechanism |
| WO2018077231A1 (en) * | 2016-10-28 | 2018-05-03 | 苏州宝时得电动工具有限公司 | Grass trimmer and line release method thereof |
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| WO2018103666A1 (en) * | 2016-12-06 | 2018-06-14 | 苏州宝时得电动工具有限公司 | Grass-cutting machine |
| CN108617226A (en) * | 2017-03-23 | 2018-10-09 | 苏州宝时得电动工具有限公司 | Grass-mowing machine |
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| CN106416588B (en) * | 2015-08-05 | 2019-08-02 | 南京德朔实业有限公司 | Grass trimmer and control method thereof |
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