WO2020029776A1 - 打草头以及包括该打草头的打草机 - Google Patents

打草头以及包括该打草头的打草机 Download PDF

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Publication number
WO2020029776A1
WO2020029776A1 PCT/CN2019/096982 CN2019096982W WO2020029776A1 WO 2020029776 A1 WO2020029776 A1 WO 2020029776A1 CN 2019096982 W CN2019096982 W CN 2019096982W WO 2020029776 A1 WO2020029776 A1 WO 2020029776A1
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WO
WIPO (PCT)
Prior art keywords
elastic member
head
clutch mechanism
winding
state
Prior art date
Application number
PCT/CN2019/096982
Other languages
English (en)
French (fr)
Inventor
聂方杰
Original Assignee
南京德朔实业有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京德朔实业有限公司 filed Critical 南京德朔实业有限公司
Priority to CA3108590A priority Critical patent/CA3108590C/en
Priority to CN201980007516.XA priority patent/CN111867356A/zh
Priority to EP19845993.5A priority patent/EP3811755A4/en
Publication of WO2020029776A1 publication Critical patent/WO2020029776A1/zh
Priority to AU2021100227A priority patent/AU2021100227A4/en
Priority to US17/156,969 priority patent/US11089725B2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4166—Mounting or replacement of the lines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4161—Means for feeding cutter line
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4161—Means for feeding cutter line
    • A01D34/4162—Means for feeding cutter line automatically
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4161—Means for feeding cutter line
    • A01D34/4163—Means for feeding cutter line by triggered line feedout, e.g. bump-feeding
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D2101/00—Lawn-mowers

Definitions

  • the present application relates to a garden tool, for example, to a lawnmower.
  • the lawn mower is a common garden tool.
  • the main principle is to use a motor or an engine to drive the grass head of the lawn mower to rotate at a high speed.
  • the flexible cutting wire is wound on a winding reel, and the winding reel is accommodated in the weeding head.
  • the end of the flexible cutting line protrudes through the hole in the housing of the weeding head.
  • the related technologies include manual pay-off, knock-out and automatic pay-off.
  • the winding methods in related technologies mainly include automatic winding and manual
  • the cutting wire needs to be passed through the winding reel, and then the casing or the winding reel is rotated so that the cutting wire is wound on the winding reel. This requires relative rotation of the casing relative to the winding disc, which requires overcoming friction between the casing and the abutting surface of the winding disc.
  • the related technology uses a mechanical clutch structure on the abutting surface, and most of them use It is a rigid clutch structure, which causes a large load when the user performs the winding operation, and the user performs a laborious winding operation, which also greatly wastes the user's time and greatly affects the user's work efficiency.
  • the present application provides a mowing head and a mowing machine including the mowing head, so that winding is easier and labor-saving.
  • An embodiment provides a lawnmower, comprising: a lawnmower head configured to moisten grass; and a driving mechanism configured to drive the lawnmower head to rotate in a first rotation direction with a rotation axis as an axis;
  • the head includes: a head case; a reel, on which a winding portion is formed; and a clutch mechanism configured to realize power transmission between the head case and the reel; the clutch mechanism The first state of synchronously rotating the head shell and the reel and the second rotation of the reel relative to the head case in the first rotation direction or opposite to the first rotation direction A second state of direction rotation; wherein the clutch mechanism includes an elastic member, and the elastic member can be elastically deformed, and the elastic member has a first form and a second form; and the elastic member is disposed at the clutch The mechanism is in the first state when the mechanism is in the first state; the elastic member is further configured to be in the second state when the clutch structure is in the second state.
  • a weeding head includes: a head shell; a winding disk having a winding portion formed on the winding disk; and a clutch mechanism configured to realize power transmission between the head casing and the winding disk ;
  • the clutch mechanism has a first state of synchronously rotating the head shell and the reel and making the reel in a first direction of rotation relative to the head case or opposite to the first direction of rotation The second state of rotation in the second rotation direction; wherein the clutch mechanism includes an elastic member, the elastic member can be elastically deformed, and the elastic member has a first form and a second form;
  • the clutch mechanism is in the first state when the clutch mechanism is in the first state; the elastic member is further configured to be in the second state when the clutch structure is in the second state.
  • a grass trimmer includes: a grass trimmer set for grass trimming; and a driving mechanism arranged to drive the grass trimmer head to rotate in a first rotation direction with a rotation axis as an axis;
  • the grass trimmer head includes: a head shell A winding reel having a winding portion formed on the winding reel; and a clutch mechanism provided to realize power transmission between the head shell and the winding reel; the clutch mechanism having the head A first state in which the casing and the reel rotate synchronously and a second state in which the reel is rotated relative to the head case in a second rotational direction opposite to the first rotational direction; wherein the clutch The mechanism includes a first magnetic component and a second magnetic component, the first magnetic component is disposed in the head case, the second magnetic component is disposed on the winding reel, or the first magnetic component is disposed on On the winding reel, the second magnetic component is disposed in the head case; wherein a magnetic force is formed between the first magnetic component and the second magnetic component, and the first magnetic component is disposed When the
  • FIG. 1 is a schematic diagram of a lawnmower according to the first embodiment of the present application.
  • FIG. 2 is a perspective view of a part of the structure of the lawnmower in FIG. 1;
  • FIG. 3 is an exploded view of a part of the structure of the lawnmower in FIG. 1;
  • FIG. 4 is a sectional view of a part of the structure of the lawnmower in FIG. 1;
  • FIG. 5 is a perspective view of a partial structure of a head shell of the lawnmower of FIG. 1;
  • FIG. 6 is a perspective view of a part of the structure of the lawnmower in FIG. 1;
  • FIG. 7 is a front view of a winding disc of the lawnmower of FIG. 1, wherein the elastic members are all in a first form;
  • FIG. 8 is a front view of a winding disc of the lawnmower of FIG. 1, in which a part of the elastic member is in a second state;
  • FIG. 9 is a schematic diagram of a part of a structure of a winding disc and a clutch mechanism of a lawnmower according to Embodiment 2 of the present application;
  • FIG. 10 is a perspective view of a winding head of a weeding head according to a third embodiment of the present application.
  • FIG. 11 is a front view of the winding disc of the weeding head in FIG. 10, wherein the elastic members are all in a first form;
  • FIG. 12 is a front view of the winding plate of the grass-crushing head in FIG. 10, in which a part of the elastic member is in a second state;
  • FIG. 13 is a schematic diagram of a winding disc, a head shell, and a clutch mechanism of the lawnmower of Embodiment 4 of the present application.
  • FIG. 1 is a schematic diagram of a lawnmower 100 according to the first embodiment of the present application.
  • the winding method of the lawnmower 100 in the present application may be manual winding or automatic winding, or a plurality of winding methods switched according to an actual operation scenario.
  • the lawnmower 100 has a weeding mode, a winding mode, and a pay-off mode, and the three modes correspond to the weeding, winding, and pay-off operations, respectively.
  • the mowing machine 100 includes a mowing rope 11, a mowing head 12, and a driving mechanism 13.
  • the mowing head 12 is provided with the mopping rope 11 to be mowed, and the driving mechanism 13 drives the mowing head 12.
  • the rotation axis 101 is used as the axis to rotate in the first rotation direction.
  • the lawnmower 100 further includes a shroud 14 to prevent grass cuttings from splattering, and a handle 15 for a user to operate.
  • the driving mechanism 13 includes a motor 131 and a motor housing 132.
  • the motor 131 is configured to drive the weeding head 12 to rotate in the first rotation direction with the rotation axis 101 as an axis.
  • the weeding head 12 includes a head shell 121, a reel or bobbin 122, and a clutch mechanism 123.
  • the head case 121 includes a detachably connected upper cover 121a and a lower cover 121b.
  • the upper cover 121a and the lower cover 121b form a receiving space for accommodating the winding reel 122 and a threading hole 121c through which the straw rope 11 passes, and the winding reel 122 A winding portion 122a provided to be wound is formed.
  • the clutch mechanism 123 is provided to realize power transmission between the head case 121 and the bobbin 122.
  • the clutch mechanism 123 has at least two states: a first state and a second state; when the clutch mechanism 123 is in the first state, the head case 121 and the winding disk 122 can rotate synchronously along the first rotation direction with the rotation axis 101 as an axis.
  • the reel 122 When the clutch mechanism 123 is in the second state, the reel 122 is relatively rotated relative to the head case 121 in the first rotation direction or in the second rotation direction. That is to say, when the clutch mechanism 123 is in the second state, the reel 122 is relatively rotated relative to the head case 121, and the relative rotation direction may be the first rotation direction or the second direction. Alternatively, the bobbin 122 can be rotated with respect to the head case 121 both in the first rotation direction and in the second direction. Regardless of the relative rotation of the reel 122 with respect to the head case 121 in the second rotation direction or the first rotation direction, as long as the relative rotation of the reel 122 and the head case 121 occurs, the winding operation can be realized.
  • the clutch mechanism 123 when the weeding head 12 is in the normal weeding mode, the clutch mechanism 123 is in the first state, and when the weeding head 12 is in the winding mode, the clutch mechanism 123 is in the second state.
  • the clutch mechanism 123 includes an elastic member 123a capable of undergoing elastic deformation.
  • the elastic member 123a When the clutch mechanism 123 is in a first state, the elastic member 123a is in a first form, and when the clutch mechanism 123 is in a second state, the elastic member 123a In the second form, that is, when the weeding head 12 is switched from the weeding mode to the winding mode, the elastic member 123a of the clutch mechanism 123 changes its form.
  • the weeding head 12 further includes a biasing element 124 which generates a biasing force capable of driving the clutch mechanism 123 to move toward the first state. That is to say, the biasing force generated by the biasing element 124 can make the clutch mechanism 123 in the first state or move the clutch mechanism 123 to the first state, and drive the winding reel 122 and the head case 121 to not rotate relative to each other.
  • the biasing element 124 can generate a biasing force against the bobbin 122 or the head case 121, that is, the biasing force can generate a component force in a direction parallel to the rotation axis 101.
  • the biasing element 124 is a coil spring provided along the direction of the rotation axis 101 or parallel to the direction of the rotation axis 101. The coil spring is fixedly connected to the lower cover 121 b of the head case 121.
  • the structure of the biasing element 124 is not limited to a spring structure, and may also be other structural members capable of elastic deformation, as long as it can satisfy the resistance against the head shell 121 or the winding coil 122 and make the head shell 121 opposite It is sufficient that the bobbin 122 generates a relative displacement in the axial direction.
  • the lawnmower 100 further includes a pay-off mode.
  • a pay-off mode When the hitch rope 11 is damaged, it is necessary to rotate the head shell 121 or the reel 122 to release a new hitch rope 11.
  • a relatively large number of pay-off methods are used for automatic pay-off: the head housing 121 is relatively displaced in the axial direction relative to the bobbin 122, and at the same time, the head shell 121 and the bobbin 122 are rotated about the rotation axis 101 along the first rotation Rotate in the direction, and use the centrifugal force to throw the straw rope 11 from the winding plate 122 through the threading hole 121c.
  • the design of the biasing element 124 enables the lawnmower 100 to cause a relative displacement of the head casing 121 relative to the winding disk 122 in the axial direction when the user hits the head casing 121 on the ground, thereby realizing automatic pay-off.
  • the biasing element 124 may generate a biasing force against the winding disc 122 or the head shell 121 when the lawnmower 100 is in the grass-removing mode, the winding mode, and the releasing mode. In the pay-off mode or the pay-off mode and the winding mode, a biasing force against the winding disk 122 or the head shell 121 is generated.
  • the biasing element 124 generates a biasing force that resists the winding disc 122 or the head case 121 when the lawnmower 100 is in the weeding mode, the winding mode, and the winding mode.
  • the first end of the biasing element 124 is fixedly connected to the head case 121, and the second end of the biasing element 124 is in contact with the bobbin 122, and the biasing element 124 produces a resistive bias against the head case 121 and the bobbin 122. pressure.
  • the first end of the biasing element 124 may also be fixedly connected to the bobbin 122, and the second end of the biasing element 124 is in contact with the head case 121.
  • the elastic member 123a can be deformed in a direction parallel to the rotation axis 101.
  • relative displacement of the head housing 121 with respect to the winding disk 122 in a direction parallel to the rotation axis 101 is generated.
  • the clutch mechanism 123 in the related art Without the elastic member 123a, during the switching of the clutch mechanism 123 from the first state to the second state, the relative displacement of the head housing 121 with respect to the reel 122 in a direction parallel to the rotation axis 101 originates from the biasing element 124 in parallel to Elastic displacement due to further compression in the direction of the rotation axis 101.
  • the relative displacement of the head housing 121 with respect to the bobbin 122 in the direction parallel to the rotation axis 101 is derived from the elastic deformation of the elastic member 123a in the direction parallel to the rotation axis 101, or at least partially relative to The displacement results from the elastic deformation of the elastic member 123a in a direction parallel to the rotation axis 101.
  • the relative displacement of the head case 121 with respect to the reel 122 in a direction parallel to the rotation axis 101 is basically derived from the elastic deformation of the elastic member 123a in the direction parallel to the rotation axis 101.
  • the biasing element 124 when the weeding head 12 is wound, may also be displaced in a direction parallel to the rotation axis 101, that is, the head shell 121 is parallel to the winding disc 122 during winding.
  • the relative displacement in the direction of the rotation axis 101 may be provided by the elastic displacement of the elastic member 123a and the elastic displacement of the biasing element 124 together.
  • the clutch mechanism 123 When the clutch mechanism 123 is in the second state, a part of the rotational torque received by the reel 122 or the head case 121 is set to resist the elastic force generated by the elastic member 123a.
  • the clutch mechanism 123 When the weeding head 12 is in the winding mode, the clutch mechanism 123 is in the second state, the elastic member 123a is in the second state, and the winding disk 122 or the head shell 121 is relatively rotated by the rotational torque. At this time, the elastic member 123a generates a contact with The component of the rotational torque is reversed.
  • One part of the rotational torque is set to overcome the component, and the other is set to drive the reel 122 and the head case 121 to rotate relative to each other.
  • the clutch mechanism 123 further includes a mating portion 123 b configured to cooperate with the elastic member 123 a to transmit power.
  • the elastic member 123a is provided on one of the reel 122 or the head case 121, and the fitting portion 123b is provided on the other of the reel 122 or the head case 121.
  • the elastic member 123a is disposed on the winding reel 122
  • the mating portion 123b is disposed on the head case 121
  • the elastic member 123 a is formed with a driving surface 11 ′.
  • the driving surface 11 ′ is substantially perpendicular to the end surface of the winding disk 122.
  • the elastic member 123a rotates in the first rotation direction, that is, when the elastic member 123a is in the first configuration, the driving surface 11 'of the elastic member 123a is set to drive the head case 121 in synchronization with the bobbin 122 in the first rotation direction.
  • the first rotation direction is a clockwise or counterclockwise rotation around the rotation axis 101.
  • the elastic member 123a is also formed with an elastic surface 12 '.
  • the elastic surface 12 ′ includes a first inclined surface 121 ′ which forms a predetermined angle with the winding plate 122 and is inclined upward.
  • the elastic surface 12 ′ further includes a second inclined surface 122 ′ which is inclined downward, and the second inclined surface 122 ′. The first end is connected to the first inclined surface 121 ', and the second end of the second inclined surface 122' is connected to the driving surface 11 '.
  • the mating portion 123b is provided with a structure that mates with the driving surface 11 'and the elastic surface 12', respectively.
  • the driving surface 11 'and the elastic surface 12' of the elastic member 123a may be a flat surface or a curved surface.
  • the second rotation direction is a counterclockwise or clockwise rotation around the rotation axis 101 opposite to the first rotation direction.
  • the first end of the elastic member 123a is fixedly connected to one end surface of the winding reel 122, and the second end of the elastic member 123a is suspended.
  • the elastic member 123a extends obliquely and upwardly along the circumferential direction of the winding reel 122, and the end surface of the winding reel 122 Forms a tilt at a preset angle.
  • the elastic member 123 a may also be formed integrally with the bobbin 122.
  • the elastic member 123a is a metal elastic sheet; in other embodiments, the elastic member 123a may be a plastic elastic sheet.
  • FIG. 7 is a plan view of the elastic member 123a in the first form, and FIG.
  • FIG. 8 is a plan view of the elastic member 123a in the second form.
  • the elastic member 123a is changed from the first form to the second form in a direction parallel to the rotation axis 101. Deformation occurred.
  • the up-down direction is set in FIG. 7, and the metal elastic piece undergoes downward deformation in a direction parallel to the rotation axis 101 after being stressed.
  • six metal elastic pieces are uniformly provided along the circumferential direction on the surface of the winding reel 122, but the number and material of the elastic pieces are not specifically limited in this embodiment.
  • the height c of the driving surface 11 ′ perpendicular to the end surface of the bobbin 122 is approximately 2 mm
  • the length a of the first inclined surface 121 ′ of the elastic member 123 a is approximately 25 mm
  • the first The length b of the inclined surface 122 ' is about 5 mm.
  • the acute angle ⁇ formed by the first inclined surface 121 'of the elastic member 123a and the end surface of the reel 122 is approximately 60 °
  • the acute angle ⁇ formed by the second inclined surface 122' of the elastic member 123a and the end surface of the reel 122 is approximately 5 °.
  • this embodiment does not limit the specific structure of the elastic member 123a.
  • the above parameter settings especially the inclination angle formed by the first inclined surface 121 ′ and the second inclined surface 122 ′ of the elastic member 123 a and the end surface of the winding disc 122 greatly reduce the Load, thereby reducing the power consumption of the motor 131.
  • the output power of the lawnmower 100 during winding is less than or equal to 529w.
  • the output power of the motor 131 is reduced by more than Equal to 30%.
  • the driving surface 11 ′ of the elastic member 123 a is substantially perpendicular to the end surface of the winding disk 122, when the clutch mechanism 123 is in the second state, basically only the winding disk 122 is allowed to move along the head housing 121.
  • the second direction is opposite to the first direction of rotation.
  • the lawnmower and the lawnmower head of the lawnmower provided in this embodiment adopt a deformable clutch structure 123 between the head shell 121 and the winding disc 122, which greatly reduces the load during winding and makes it used. Winding is easier and labor-saving, so the utility of the mowing head is improved.
  • FIG. 9 is a schematic diagram showing a part of the structure of the winding disk 222 and the clutch mechanism in the second embodiment of the present application.
  • the difference between this embodiment and the first embodiment lies in the structure of the clutch mechanism.
  • the first embodiment is different from the first embodiment Appropriate parts can be applied to this embodiment, and only the differences between this embodiment and the first embodiment will be described below.
  • the driving surface 21 'of the elastic member 223a is disposed at a non-zero acute angle with the vertical direction.
  • the driving surface 21 'of the elastic member 223a is inclined obliquely downward relative to the vertical direction, and forms an acute angle n with the upper end surface 222a of the bobbin 222 as shown in FIG.
  • the mating portion (not shown in the figure) is also provided with an inclined surface parallel to the driving surface 21 ′.
  • the driving surface 21 ′ and the inclined surface on the engaging portion cooperate with each other when the clutch mechanism is in the first state.
  • the driving surface 21 ′ drives the mating portion along the first In a rotation direction, the driving force in the first rotation direction received by the reel 222 at this time is not large enough to cause relative movement between the driving surface 21 ′ and the mating portion.
  • the reel 222 receives a sufficiently large driving force in the first rotation direction, so that a relative movement occurs between the driving surface 21 'and the mating portion, and the driving surface 21' generates relative to the mating portion. Rotation in the first rotation direction.
  • this embodiment can also realize the second winding coil 222 with respect to the head shell in a second direction opposite to the first rotation direction. Turn in the direction of rotation. That is to say, when the clutch structure in this embodiment is in the second state, the winding reel 222 can rotate with respect to the head case both in the first rotation direction and in the second rotation direction.
  • 10 to 12 are schematic structural diagrams of a winding head 322 and an elastic member 323a of the weeding head according to the third embodiment of the present application.
  • the difference between this embodiment and the first embodiment is only that the structures of the elastic member 323a and the winding plate 322 are different.
  • the parts in Embodiment 1 that are compatible with this embodiment can be applied to this embodiment. Only the differences between this embodiment and the first embodiment will be described below.
  • FIG. 11 is a plan view of the elastic member 323a in the first form
  • FIG. 12 is a plan view of the elastic member 323a in the second form.
  • the elastic member 323a changes from the first form to the second form in a direction parallel to the rotation axis 301. Deformation occurred.
  • the elastic member 323a of the clutch mechanism 323 in this embodiment is a metal elastic piece, and three metal elastic pieces are evenly arranged along the circumferential direction on the surface of the winding disk 322.
  • the number of elastic pieces in this embodiment is not limited.
  • the function of the clutch mechanism 323 can be realized as long as the number of the elastic pieces is greater than or equal to one.
  • the elastic member 323a is also formed with a driving surface 31 ', and the driving surface 31' is configured to drive the mating portion (not shown) with the elastic member 323a when the elastic member 323a is in the first configuration.
  • the surface 31 ′ is perpendicular to the end surface of the bobbin 322, and the elastic member 323 a further forms an elastic surface 32 ′.
  • the elastic surface 32 ′ is configured to rotate the engaging portion relative to the elastic member 323 a when the elastic member 323 a is in the second configuration.
  • the elastic surface 32 ' includes a first inclined surface 321' that forms a predetermined angle with the winding plate 322 and is inclined upward.
  • the elastic surface 32 'further includes a second inclined surface 322' inclined downward.
  • the first end of the elastic piece 323a is fixedly connected to one end surface of the winding plate 322, and the second end of the elastic piece 323a is provided with a flange 323b, which extends to the inside of the winding plate 322.
  • the elastic piece 323a is in the first position.
  • the flange 323b abuts or contacts the winding disc 322 on a plane parallel to the end surface of the winding disc 322 to prevent the elastic member 323a from moving upward with the mating portion when the lawnmower is in the laying mode;
  • the flange 323b does not contact the winding disk 322 on a plane parallel to the end surface of the winding disk 322.
  • the elastic member 323a is displaced upward by a predetermined distance
  • the flange 323b abuts against The bobbin 322 prevents excessive displacement of the elastic member 323a upward.
  • the flange 323b only needs to prevent the elastic member 323a from being excessively displaced upward in a direction parallel to the rotation axis 301. It can also be said that the friction between the elastic member 323a and the mating portion is too large. As a result, the winding disc 322 and the head shell cannot produce a relative displacement in a direction parallel to the rotation axis 301.
  • FIG. 13 is a schematic diagram showing a winding head 422 and a head shell 421 of the weeding head according to the fourth embodiment of the present application.
  • the clutch mechanism includes a first magnetic component and a second magnetic component: the first magnetic component is disposed on one of the head case 421 or the winding reel 422; the second magnetic component is disposed on the head case 421 or the winding reel The other of 422; a magnetic force is formed between the first magnetic component and the second magnetic component; when the clutch mechanism is in the second state, the repulsive force between the first magnetic component and the second magnetic component is greater than the attractive force.
  • the first magnetic component provided on the bobbin 422 includes at least one first magnetic piece 423a
  • the second magnetic component provided on the head case 421 includes at least one second magnetic piece 423b; the first magnetic piece 423a and the second magnetic piece 423b Both are made of magnetic materials.
  • the clutch mechanism is in the second state, the first magnetic piece 423a and the second magnetic piece 423b cooperate with each other and have opposite magnetic poles.
  • the first magnetic piece 423a is approximately inclined, and the first magnetic piece 423a is provided with an inclined surface 423c.
  • the magnetic surface of the inclined surface 423c is an N pole or an S pole.
  • the first magnetic piece 423a is opposite to the inclined surface 423c.
  • the magnetic pole on the bottom surface is opposite to the magnetic pole on the inclined surface 423c.
  • the second magnetic piece 423b has a mating inclined surface 423d that cooperates with the inclined surface 423c of the first magnetic component.
  • the magnetic pole of the mating inclined surface 423d is opposite to the magnetic pole of the inclined surface 423c of the first magnetic component.
  • the first magnetic piece 423a further includes a driving surface 423e, which is substantially perpendicular to the upper end surface of the winding disc 422.
  • the second magnetic piece 423b has a driven surface 423f that cooperates with the driving surface 423e.
  • the driving surface 423e drives the driven surface 423f to rotate around the rotation axis 401.
  • an oblique wedge made of an elastic material may be disposed on the surface of the winding reel as an elastic member, and the oblique wedge may be formed on the surface of the reel by a method of secondary injection.
  • an elastic structure capable of elastic deformation and cooperating with each other can also be provided on the head shell and the winding disc, that is to say, both the elastic member and the mating portion have elastic deformation generated during winding.
  • any clutch structure capable of elastic deformation in a direction parallel to the rotation axis when winding the weeding head is within the protection scope of the present application.

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Abstract

一种打草机，包括打草头和驱动机构；所述打草头包括：头壳、绕线盘及离合机构，所述离合机构设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构包括可发生弹性形变的弹性件。

Description

打草头以及包括该打草头的打草机
本申请要求申请日为2018年8月7日、申请号为201810891350.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种园林工具，例如涉及一种打草机。
背景技术
打草机是一种常见的园林工具，主要原理是利用电机或者引擎驱动打草机的打草头高速转动。柔性切割线缠绕在绕线盘上，且所述绕线盘容纳在打草头中，柔性切割线的端部通过打草头壳体上的孔伸出，打草头高速旋转时，柔性切割线也随打草头高速转动，从而实现切割的作用。
当伸出打草头壳体之外的柔性切割线断裂或者被磨损时，就需要从绕线盘上释放出新的切割线，相关技术中有手动放线、敲击放线和自动放线等方式来实现打草头的放线，当绕线盘上的柔性切割线释放完了之后，则需要对绕线盘进行切割线的补给，相关技术中的绕线方法主要有自动绕线和手动绕线两种，都需要将切割线穿过绕线盘，然后旋转壳体或者绕线盘使得切割线缠绕至绕线盘上。这需要壳体相对绕线盘发生相对转动，这要求克服壳体与绕线盘贴合面之间的摩擦，相关技术采用的是在该贴合面上设置机械离合结构，且大多数采用的是刚性的离合结构，这使得使用者进行绕线操作时负载较大，用户进行绕线操作很费力，也极大的浪费了使用者的时间，很大程度上影响了使用者的工作效率。
发明内容
本申请提供了一种打草头以及包括该打草头的打草机，使得绕线更加轻松省力。
一实施例提供了一种打草机，包括：打草头，设置为打草；及驱动机构，设置为驱动所述打草头以转动轴线为轴沿第一转动方向转动；所述打草头包括：头壳；绕线盘，所述绕线盘上形成有绕线部；及离合机构，设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构具有使所述头壳和所述绕线盘同步转动的第一状态及使所述绕线盘相对所述头壳沿所述第一转动方向或者与所述第一转动方向相反的第二转动方向转动的第二状态；其中，所述离合机 构包括弹性件，所述弹性件可发生弹性形变，且所述弹性件具有第一形态和第二形态；所述弹性件设置为在所述离合机构处于所述第一状态时处于所述第一形态；所述弹性件还设置为在所述离合结构处于所述第二状态时处于所述第二形态。
一种打草头，包括：头壳；绕线盘，所述绕线盘上形成有绕线部；及离合机构，设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构具有使所述头壳和所述绕线盘同步转动的第一状态及使所述绕线盘相对所述头壳沿第一转动方向或者与所述第一转动方向相反的第二转动方向转动的第二状态；其中，所述离合机构包括弹性件，所述弹性件可发生弹性形变，且所述弹性件具有第一形态和第二形态；所述弹性件设置为在所述离合机构处于所述第一状态时处于所述第一形态；所述弹性件还设置为在所述离合结构处于所述第二状态时处于所述第二形态。
一种打草机，包括：打草头，设置为打草；及驱动机构，设置为驱动所述打草头以转动轴线为轴沿第一转动方向转动；所述打草头包括：头壳；绕线盘，所述绕线盘上形成有绕线部；及离合机构，设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构具有使所述头壳和所述绕线盘同步转动的第一状态及使所述绕线盘相对所述头壳沿与所述第一转动方向相反的第二转动方向转动的第二状态；其中，所述离合机构包括第一磁性组件和第二磁性组件，所述第一磁性组件设置于所述头壳中，所述第二磁性组件设置于所述绕线盘上，或者所述第一磁性组件设置于所述绕线盘上，所述第二磁性组件设置于所述头壳中；其中，所述第一磁性组件与所述第二磁性组件之间形成有磁力作用，所述第一磁性组件设置为在所述离合机构处于所述第二状态时，与所述第二磁性组件之间的排斥力大于吸引力。
附图说明
图1是本申请的实施例一的打草机的示意图；
图2是图1中的打草机的部分结构的立体图；
图3是图1中的打草机的部分结构的爆炸图；
图4是图1中的打草机的部分结构的剖视图；
图5是图1中的打草机的头壳的部分结构的立体图；
图6是图1中的打草机的部分结构的立体图；
图7是图1中的打草机的绕线盘的正视图，其中弹性件均处于第一形态；
图8是图1中的打草机的绕线盘的正视图，其中部分弹性件处于第二形态；
图9是本申请的实施例二的打草机的绕线盘以及离合机构的部分结构的示意图；
图10是本申请的实施例三的打草头的绕线盘的立体图；
图11是图10中的打草头的绕线盘的正视图，其中弹性件均处于第一形态；
图12是图10中的打草头的绕线盘的正视图，其中部分弹性件处于第二形态；
图13是本申请的实施例四的打草机的绕线盘、头壳和离合机构的示意图。
具体实施方式
实施例一
图1所示为本申请的实施例一的打草机100的示意图。本申请中的打草机100的绕线方法既可以是手动绕线也可以是自动绕线，或者是根据实际操作场景切换的多种绕线方法。打草机100具有打草模式、绕线模式以及放线模式，三种模式分别对应打草、绕线以及放线操作。
如图1和图2所示，打草机100包括打草绳11、打草头12以及驱动机构13，打草头12配合打草绳11设置为打草，驱动机构13驱动打草头12以转动轴线101为轴沿第一转动方向转动。打草机100还包括防止草屑飞溅的护罩14以及供用户操作的把手15。
如图3和图4所示，驱动机构13包括电机131以及电机壳体132，电机131设置为驱动打草头12以转动轴线101为轴沿第一转动方向转动。打草头12包括头壳121、绕线盘或线轴122和离合机构123。头壳121包括可拆卸连接的上盖121a和下盖121b，上盖121a和下盖121b围绕形成容纳绕线盘122的容纳空间以及供打草绳11穿过的穿线孔121c，绕线盘122形成有设置为绕线的绕线部122a。
离合机构123设置为在头壳121和绕线盘122之间实现动力的传递。离合机构123至少具有第一状态和第二状态两个状态；当离合机构123处于第一状态时，头壳121和绕线盘122能够以转动轴线101为轴，沿第一转动方向同步转动。
当离合机构123处于第二状态时，绕线盘122相对头壳121产生沿第一转动方向或者沿第二转动方向的相对转动。也即是说，当离合机构123处于第二状态时，绕线盘122相对头壳121发生相对转动，相对转动的方向可以是第一转动方向也可以是第二方向。或者，绕线盘122相对头壳121既能够沿第一转动方向转动也能够沿第二方向转动。无论绕线盘122相对头壳121产生沿第二转动方向的相对转动还是沿第一转动方向的相对转动，只要绕线盘122和头壳121产生了相对转 动即可实现绕线操作。
在一实施例中，打草头12处于正常的打草模式时，离合机构123即处于第一状态，打草头12处于绕线模式时，离合机构123即处于第二状态。如图3所示，离合机构123包括能够发生弹性形变的弹性件123a，当离合机构123处于第一状态时，弹性件123a处于第一形态，当离合机构123处于第二状态时，弹性件123a处于第二形态，也即是说，打草头12从打草模式切换至绕线模式时，离合机构123的弹性件123a发生了形态变化。
打草头12还包括偏压元件124，偏压元件124产生能驱动离合机构123朝向第一状态运动的偏压力。也即是说，偏压元件124产生的偏压力能够使得离合机构123处于第一状态或者使离合机构123运动至第一状态，驱动绕线盘122与头壳121不发生相对转动。
偏压元件124能够产生抵持所述绕线盘122或者所述头壳121的偏压力，也即是说该偏压力能够在平行于转动轴线101的方向上产生分力。在一实施例中，偏压元件124为沿转动轴线101方向或者平行于转动轴线101方向设置的螺旋弹簧，螺旋弹簧固定连接至头壳121的下盖121b。在其他实施例中，偏压元件124的结构不仅限于弹簧结构，也可以是其它能够发生弹性形变的结构件，只要能够满足对头壳121或者绕线盘122起抵持作用且使得头壳121相对绕线盘122产生沿轴向的相对位移即可。
在一实施例中，打草机100还具备放线模式，当打草绳11损坏时，需要旋转头壳121或者绕线盘122以放出新的打草绳11。相关技术中运用较多的放线方法为自动放线：使头壳121相对绕线盘122发生沿轴向的相对位移，同时使得头壳121和绕线盘122绕转动轴线101沿第一转动方向转动，运用离心力将打草绳11从绕线盘122通过穿线孔121c甩出。偏压元件124的设计能够使得打草机100在用户向地面敲击头壳121时，使头壳121相对绕线盘122发生沿轴向的相对位移，从而实现自动放线。在一实施例中，偏压元件124可以在打草机100处于打草模式、绕线模式以及放线模式时均产生抵持绕线盘122或者抵持头壳121的偏压力，也可以只在放线模式或者放线模式与绕线模式时产生抵持绕线盘122或者抵持头壳121的偏压力。
在本实施例中，偏压元件124在打草机100处于打草模式、绕线模式以及放线模式时，均产生抵持绕线盘122或者头壳121的偏压力。其中，偏压元件124的第一端固定连接至头壳121，偏压元件124的第二端与绕线盘122接触，偏压元件 124对头壳121和绕线盘122均产生抵持的偏压力。在一实施例中，偏压元件124的第一端也可以与绕线盘122构成固定连接，偏压元件124的第二端接触至头壳121。
弹性件123a由第一形态变化至第二形态的过程中能在平行于转动轴线101的方向上发生形变。在一实施例中，离合机构123从第一状态切换至第二状态的过程中头壳121相对于绕线盘122在平行于转动轴线101方向上有相对位移产生，相关技术中的离合机构123不具有弹性件123a，离合机构123从第一状态切换至第二状态的过程中，头壳121相对于绕线盘122在平行于转动轴线101方向的相对位移来源于偏压元件124在平行于转动轴线101方向的进一步压缩产生的弹性位移。本实施例的不同之处在于，头壳121相对于绕线盘122在平行于转动轴线101方向的相对位移来源于弹性件123a在平行于转动轴线101方向上发生的弹性形变，或者至少部分相对位移来源于弹性件123a在平行于转动轴线101方向上发生的弹性形变。在本实施例中，头壳121相对于绕线盘122在平行于转动轴线101方向的相对位移基本全部来源于弹性件123a在平行于转动轴线101方向上发生的弹性形变。在其他实施例中，打草头12绕线时偏压元件124也可以在平行于转动轴线101方向上产生位移，也即是说，绕线时头壳121相对于绕线盘122在平行于转动轴线101方向的相对位移可以由弹性件123a的弹性位移和偏压元件124的弹性位移共同提供。
在离合机构123处于第二状态时，绕线盘122或者头壳121受到的旋转扭力一部分设置为抵抗弹性件123a产生的弹性力。在打草头12处于绕线模式时，离合机构123处于第二状态，弹性件123a处于第二形态，绕线盘122或者头壳121受到旋转扭力发生相对转动，此时弹性件123a产生一个与旋转扭力反向的分力，旋转扭力的一部分设置为克服该分力，另一部分设置为驱动绕线盘122和头壳121发生相对转动。
如图5至图8所示，离合机构123还包括设置为与弹性件123a配合以传递动力的配合部123b。弹性件123a设置于绕线盘122或者头壳121中的一个，配合部123b设置于绕线盘122或者头壳121中的另一个。在本实施例中，弹性件123a设置于绕线盘122上，配合部123b设置于头壳121上，且设置于头壳121的上盖121a中。如图6所示，弹性件123a形成有一个驱动面11’，驱动面11’基本垂直于绕线盘122的端面，在弹性件123a处于第一形态时，驱动面11’驱动配合部123b随弹性件123a沿第一转动方向转动，也即是说，在弹性件123a处于第一形态时，弹性 件123a的驱动面11’设置为驱动头壳121随绕线盘122沿第一转动方向同步转动。本实施例中，第一转动方向为围绕转动轴线101转动的顺时针方向或者逆时针方向。
弹性件123a还形成有弹性面12’，弹性面12’在弹性件123a处于第二形态时使配合部123b相对弹性件123a沿第二转动方向转动，如图6和图7所示，弹性面12’包括与绕线盘122构成预设角度且向上倾斜的第一斜面121’，本实施例中，弹性面12’还包括一个向下倾斜的第二斜面122’，第二斜面122’的第一端与第一斜面121’连接，第二斜面122’的第二端与驱动面11’连接。配合部123b上设置有分别与驱动面11’以及弹性面12’相配合的结构。在一实施例中，弹性件123a的驱动面11’和弹性面12’既可以是平面也可以是曲面。本实施例中，第二转动方向为与第一转动方向相反的围绕转动轴线101转动的逆时针方向或者顺时针方向。
弹性件123a的第一端固定连接至绕线盘122的一个端面，弹性件123a的第二端悬空设置，弹性件123a沿绕线盘122的周向倾斜向上延伸，与绕线盘122的端面构成预设角度的倾斜。在一实施例中，弹性件123a也可以与绕线盘122一体成型。在本实施例中，弹性件123a为金属弹片；在其他实施例中，弹性件123a可以为塑料弹片。图7为弹性件123a处于第一形态的平面图，图8为弹性件123a处于第二形态的平面图，弹性件123a由第一形态变化至第二形态的过程中在平行于转动轴线101的方向上发生了形变。为了说明方便，图7中设置了上下方向，金属弹片受力后在平行于转动轴线101方向上发生了向下的形变。另外，本实施例中在绕线盘122表面沿周向均匀设置了六个金属弹片，但本实施例对弹片的数量和材质均不作具体限定。
如图6和图7所示，驱动面11’垂直于绕线盘122的端面的高度c约为2mm，弹性件123a的第一斜面121’的长度a约为25mm，弹性件123a的第一斜面122’的长度b约为5mm。弹性件123a的第一斜面121’与绕线盘122的端面构成的锐角α约为60°，弹性件123a的第二斜面122’与绕线盘122的端面构成的锐角β约为5°。其中，本实施例不对弹性件123a的具体结构作出限定。事实上，以上的参数设定，尤其是弹性件123a的第一斜面121’和第二斜面122’与绕线盘122的端面构成的倾斜角度极大地减小了打草机100绕线时的负载，从而减小了电机131的功耗。本实施例中的打草机100在绕线时的输出功率小于等于529w，相比较采用尺寸一致但不能发生弹性形变的离合机构的打草机，绕线时电机131的输出功率的 减少量大于等于30％。
本实施例中，由于弹性件123a的驱动面11’基本垂直于绕线盘122的端面，因此，离合机构123在处于第二状态时，基本上只允许绕线盘122相对于头壳121沿与第一转动方向相反的第二方向转动。
本实施例提供的打草机及该打草机的打草头，在头壳121以及绕线盘122之间采用了可发生形变的离合结构123，大大减少了绕线时的负载，使得使用者绕线更加轻松省力，因此提高了打草头的实用性。
实施例二
图9所示为本申请的实施例二的绕线盘222以及离合机构的部分结构的示意图，本实施例与实施例一的区别在于离合机构的结构不同，实施例一中与本实施例中相适应的部分均可以应用到本实施例中，以下仅介绍本实施例与第一实施例的区别部分。弹性件223a的驱动面21’与竖直方向呈非零锐角设置。在一实施例中，弹性件223a的驱动面21’相对竖直方向斜向下，并与绕线盘222的上端面222a构成如图9所示的锐角n。配合部(图未标)上也设置有与驱动面21’平行的斜面，驱动面21’与配合部上的斜面在离合机构处于第一状态时相互配合，驱动面21’驱动配合部沿第一转动方向转动，此时绕线盘222受到的沿第一转动方向的驱动力不足够大，不足以使得驱动面21’和配合部之间产生相对运动。当离合机构处于第二状态时，绕线盘222受到一个沿第一转动方向的足够大的驱动力，使得驱动面21’和配合部之间产生相对运动，驱动面21’相对于配合部产生沿第一转动方向的转动。在一实施例中，由于弹性件223a的其他部分结构与图5至图8中所示相同，因此本实施例同样能够实现绕线盘222相对于头壳沿与第一转动方向相反的第二转动方向转动。也即是说，本实施例中的离合结构处于第二状态时，绕线盘222相对头壳既能够沿第一转动方向转动也能够沿第二转动方向转动。
实施例三
图10至图12所示为本申请的实施例三的打草头的绕线盘322以及弹性件323a的结构示意图。本实施例与实施例一的区别仅在于弹性件323a和绕线盘322的结构不同。实施例一中与本实施例中相适应的部分均可以应用到本实施例中，以下仅介绍本实施例与第一实施例的区别部分。
图11为弹性件323a处于第一形态的平面图，图12为弹性件323a处于第二形态的平面图，弹性件323a由第一形态变化至第二形态的过程中在平行于转动轴 线301的方向向下发生了形变。本实施例中的离合机构323的弹性件323a为金属弹片，在绕线盘322表面沿周向均匀设置了3个金属弹片，同样的，本实施例中的弹片数量也不作限制。在一实施例中，只要弹片的数量大于等于一即可实现离合机构323的功能。本实施例中的弹性件323a同样形成有一个驱动面31’，该驱动面31’设置为在弹性件323a位于第一形态时，驱动配合部(图未标)随弹性件323a转动，该驱动面31’垂直于绕线盘322的端面，弹性件323a还形成有一个弹性面32’，该弹性面32’设置为在弹性件323a位于第二形态时，使配合部相对弹性件323a转动。弹性面32’包括与绕线盘322构成预设角度且向上倾斜的第一斜面321’，本实施例中，弹性面32’还包括一个向下倾斜的第二斜面322’。弹性件323a的第一端固定连接至绕线盘322的一个端面，弹性件323a的第二端设置有一个翻边323b，翻边323b延伸至绕线盘322内部，在弹性件323a处于第一形态时，翻边323b在平行于绕线盘322的端面的平面上抵触或接触至绕线盘322，防止在打草机处于放线模式时弹性件323a随着配合部产生向上的位移；在弹性件323a处于第一形态时，翻边323b在平行于绕线盘322的端面的平面上与绕线盘322不接触，当弹性件323a向上发生预设距离的位移时，翻边323b抵触至绕线盘322，防止弹性件323a向上发生过大的位移。在一实施例中，翻边323b只要能够防止弹性件323a在平行于转动轴线301的方向向上产生过大的位移即可，也可以说防止由于弹性件323a与配合部之间的摩擦力过大，导致绕线盘322与头壳在平行于转动轴线301方向无法产生相对位移。
实施例四
图13所示为本申请的实施例四的打草头的绕线盘422与头壳421的示意图。本实施例与前三个实施例的区别在于离合机构的结构以及工作原理不同。本实实施例中，离合机构包括第一磁性组件和第二磁性组件：第一磁性组件设置于头壳421或者绕线盘422中的一个；第二磁性组件设置于头壳421或者绕线盘422中的另一个；第一磁性组件与第二磁性组件之间形成有磁力作用；在离合机构处于第二状态时，第一磁性组件与第二磁性组件之间的排斥力大于吸引力。设置于绕线盘422的第一磁性组件包括至少一个第一磁性件423a，设置于头壳421的第二磁性组件包括至少一个第二磁性件423b；第一磁性件423a与第二磁性件423b均由磁性材料制成。当离合机构处于第二状态时，第一磁性件423a与第二磁性件423b配合，且分别具有相反的磁极。
本实施例中，第一磁性件423a近似为斜块状，第一磁性件423a上设有斜面 423c，其中斜面423c所在磁极为N极或者S极，第一磁性件423a上与斜面423c相对的底面的磁极与斜面423c的磁极相反。第二磁性件423b具有与第一磁性组件的斜面423c配合的配合斜面423d，配合斜面423d的磁极与第一磁性组件的斜面423c的磁极相反。这使得离合机构处于第二状态时，第一磁性组件与第二磁性组件之间的排斥力大于吸引力，利用相反磁极之间的排斥力贡献一部分下压偏压元件的力，从而减轻绕线时的负载。第一磁性件423a还包括驱动面423e，驱动面423e基本垂直于绕线盘422的上端面；第二磁性件423b具有与驱动面423e配合的被驱动面423f，在离合机构处于第一状态时，驱动面423e驱动被驱动面423f以转动轴线401为轴转动。
本申请中的离合机构的结构不局限于以上四个实施例中所展示的结构。在一实施例中，可以在绕线盘表面设置弹性材料制成的斜楔块作为弹性件，并通过二次注塑的方法将该斜楔块成型至绕线盘表面。在其他实施例中，还可以在头壳和绕线盘上均设置可发生弹性形变且相互配合的弹性结构，也即是说弹性件和配合部在绕线时均有弹性形变产生。总之，只要是能够在打草头绕线时在平行于转动轴线方向有弹性形变的离合结构均在本申请的保护范围内。

Claims (15)

  1. 一种打草机，包括：
    打草头，设置为打草；及
    驱动机构，设置为驱动所述打草头以转动轴线为轴沿第一转动方向转动；
    所述打草头包括：
    头壳；
    绕线盘，所述绕线盘上形成有绕线部；及
    离合机构，设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构具有使所述头壳和所述绕线盘同步转动的第一状态及使所述绕线盘相对所述头壳沿所述第一转动方向或者与所述第一转动方向相反的第二转动方向转动的第二状态；
    其中，所述离合机构包括弹性件，所述弹性件可发生弹性形变，且所述弹性件具有第一形态和第二形态；
    所述弹性件设置为在所述离合机构处于所述第一状态时处于所述第一形态；所述弹性件还设置为在所述离合结构处于所述第二状态时处于所述第二形态。
  2. 根据权利要求1所述的打草机，还包括偏压元件，所述偏压元件设置为产生驱动所述离合机构朝向所述第一状态运动的偏压力。
  3. 根据权利要求2所述的打草机，其中，所述偏压元件设置为在平行于所述打草头的转动轴线的方向上产生偏压力；所述弹性件设置为由所述第一形态变化至所述第二形态的过程中在平行于所述转动轴线的方向上发生形变。
  4. 根据权利要求3所述的打草机，其中，所述偏压元件为沿所述转动轴线方向或者平行于所述转动轴线方向设置的螺旋弹簧。
  5. 根据权利要求1所述的打草机，还包括偏压元件，设置为产生抵持所述绕线盘或者所述头壳的偏压力；
    所述离合机构处于所述第二状态时，所述绕线盘或者所述头壳受到的旋转扭力的至少一部分设置为抵抗所述弹性件产生的弹性力。
  6. 根据权利要求1所述的打草机，还包括偏压元件，所述偏压元件设置为在所述离合机构处于所述第二状态时，产生抵持所述绕线盘或者所述头壳的偏压力；所述弹性件设置为在所述离合机构处于所述第二状态时，产生抵持所述绕线盘或者所述头壳的弹性力。
  7. 根据权利要求1所述的打草机，其中，所述弹性件与所述绕线盘一体成型，或者所述弹性件与所述头壳一体成型。
  8. 根据权利要求1所述的打草机，其中，所述弹性件设置于所述绕线盘上或者所述头壳上。
  9. 根据权利要求8所述的打草机，其中，所述离合机构还包括设置为与所述弹性件配合以传递动力的配合部。
  10. 根据权利要求9所述的打草机，其中，所述弹性件设置于所述绕线盘上，所述配合部设置于所述头壳上，或者所述弹性件设置于所述头壳上，所述配合部设置于所述绕线盘上；
    所述弹性件上设有驱动面和弹性面，所述驱动面设置为在所述弹性件位于所述第一形态时驱动所述配合部随所述弹性件转动；所述弹性面设置为在所述弹性件位于所述第二形态时使所述配合部相对所述弹性件转动。
  11. 一种打草头，包括：
    头壳；
    绕线盘，所述绕线盘上形成有绕线部；及
    离合机构，设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构具有使所述头壳和所述绕线盘同步转动的第一状态及使所述绕线盘相对所述头壳产生沿第一转动方向或者与所述第一转动方向相反的第二转动方向转动的第二状态；
    其中，所述离合机构包括弹性件，所述弹性件可发生弹性形变，且所述弹性件具有第一形态和第二形态；
    所述弹性件设置为在所述离合机构处于所述第一状态时处于所述第一形态；所述弹性件还设置为在所述离合结构处于所述第二状态时处于所述第二形态。
  12. 根据权利要求11所述的打草头，还包括偏压元件，所述偏压元件设置为产生驱动所述离合机构朝向所述第一状态运动的偏压力。
  13. 根据权利要求12所述的打草头，其中，所述偏压元件设置为在平行于所述打草头的转动轴线的方向上产生偏压力；所述弹性件设置为由所述第一形态变化至所述第二形态的过程中在平行于所述转动轴线的方向上发生形变。
  14. 一种打草机，包括：
    打草头，设置为打草；及
    驱动机构，设置为驱动所述打草头以转动轴线为轴沿第一转动方向转动；
    所述打草头包括：
    头壳；
    绕线盘，所述绕线盘上形成有绕线部；及
    离合机构，设置为在所述头壳和所述绕线盘之间实现动力的传递；所述离合机构具有使所述头壳和所述绕线盘同步转动的第一状态及使所述绕线盘相对所述头壳沿与所述第一转动方向相反的第二转动方向转动的第二状态；
    其中，所述离合机构包括第一磁性组件和第二磁性组件，所述第一磁性组件设置于所述头壳中，所述第二磁性组件设置于所述绕线盘上；或
    所述第一磁性组件设置于所述绕线盘上，所述第二磁性组件设置于所述头壳中；
    其中，所述第一磁性组件与所述第二磁性组件之间形成有磁力作用，所述第一磁性组件设置为在所述离合机构处于所述第二状态时，与所述第二磁性组件之间的排斥力大于吸引力。
  15. 根据权利要求14所述的打草机，其中，所述第一磁性组件还设置为当所述离合机构处于所述第一状态时，与所述第二磁性组件之间的吸引力大于排斥力。
PCT/CN2019/096982 2017-08-07 2019-07-22 打草头以及包括该打草头的打草机 WO2020029776A1 (zh)

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