WO2019238122A1

WO2019238122A1 - Grass trimming head and grass trimming machine provided with same

Info

Publication number: WO2019238122A1
Application number: PCT/CN2019/091295
Authority: WO
Inventors: 魏娟; 汤贺; 聂恒安
Original assignee: 天佑电器（苏州）有限公司
Priority date: 2018-06-14
Filing date: 2019-06-14
Publication date: 2019-12-19
Also published as: CN208402475U

Abstract

Provided is a grass trimming head (100), comprising a rotating shaft (10), and a wire coil (20) and a head housing (30) which use an axis of the rotating shaft (10) as a rotating axis. The wire coil (20) comprises a winding part (21) sleeved on the rotating shaft (10) and two flanges (23) provided at two ends of the winding part (21). The wire coil (20) is provided with at least one insertion wire channel (231). The insertion wire channel (231) is provided with a channel inlet (2311) which cooperates with a wire penetrating hole (313); one end of a grass trimming rope sequentially penetrates through the wire penetrating hole (313) and the channel inlet (2311) and extends into the insertion wire channel (231); and a part, away from the insertion wire channel (231), of the grass trimming rope extends towards the winding part (21).

Description

Mowing head and mowing machine having the same

[0001] The present invention relates to the technical field of electric tools, and in particular, to a grass mowing head and a grass mowing machine having the same.

Background technique

[0002] As a common garden tool, lawnmowers are widely used for trimming lawns, gardens, pastures, and the like. Generally, 5 saw some lawnmowers use motors to drive the straw ropes drawn from the reels to rotate at high speed to achieve weed cutting and repair.

[0003] The straw rope is relatively worn during use, and the reels need to be put out in time to ensure the efficiency of straw weeding. When the flexible cutting line outside the casing of the weeding head breaks or is worn, a new cutting line must be released from the spool. 5 In the prior art, the way to release the weeding rope is more mature, but After the flexible cutting line on the spool is completely released, how to replenish the cutting line on the spool has become an urgent problem. 5 Seeing the technology, the assembly structure in the housing of the straw head is disassembled. Then, take out the bobbin and perform manual winding. In this way, it takes more time and the efficiency is relatively low. In addition, in the manual winding process, because most of the weeding heads are extended from the opposite holes of its casing. Two lengths of cutting lines are produced, so it is easy to cross or knot the two strands in the winding process. Once the two strands cross or knot, it will affect the correct release of subsequent cutting lines. This brings great distress to the user's work, and of course, it greatly wastes the user's time, which greatly affects his work efficiency.

Summary of invention

technical problem

Problem solution

Technical solutions

[0004] The object of the present invention is to provide a mowing head and a mowing machine having the same.

[0005] In order to achieve one of the objectives of the above utility model, the utility model provides a grass mowing head, the grass mowing head includes: a rotating shaft, and a reel and a head shell with an axis of the rotating shaft as a rotating shaft, Bobbin for winding Straw rope, the head shell is used for accommodating the wire reel and formed with a threading hole through which the straw wire is passed; the wire reel and the head shell are optionally configured to be relatively rotated or relatively stationary ;

[0006] The wire reel includes: a winding part and two flanges provided at both ends of the winding part; the wire reel is provided with at least one wire insertion channel, and the wire insertion channel is provided with a channel matched with the threading hole At the entrance, one end of the straw rope passes through the threading hole, the channel entrance and extends inside the patch channel in order, and the part of the straw rope away from the patch channel extends toward the winding portion.

[0007] As a further improvement of the present utility model, the mowing head further includes a transition channel for defining a release path of the mowing rope, and the transition channel is located on a side of the channel entrance away from the patch channel. And the transition channel communicates with the patch channel.

[0008] As a further improvement of the present invention, the flange includes a first end surface and a second end surface that are staggered, the flange includes a first end surface and a second end surface that are staggered, and the first end surface includes a first An extended end surface, the second end surface includes a second extended end surface, the first extended end surface and the second extended end surface are located in a staggered area of the first end surface and the second end surface; the first extended end surface and the first end surface The two extended end surfaces cooperate with each other to form the transition channel;

[0009] The second extended end surface includes a plane that is matched with and parallel to the first extended end surface and an inclined plane connecting the plane, and an obtuse angle is formed between the plane and the inclined plane, and the inclined plane protrudes. The first extension end surface, the first extension end surface and the plane defining a first release path, and the inclined surface defining a second release path; the channel entrance is provided between the first extension end surface and the plane .

[0010] As a further improvement of the present invention, the transition channel further includes: a first connection surface connecting the first extension end surface and the plane and extending along a first release path, connecting the first extension end surface, The plane, the second connection surface of the first connection surface, the boundary area of the second connection surface connection portion between the plane and the inclined surface, and the channel entrance is opened at the first connection surface.

[0011] As a further improvement of the present invention, the mowing head further includes a mowing rope fixing piece, and the mopping rope fixing piece and the wire insertion channel cooperate with each other to limit the mopping rope from the plug. Line channel.

[0012] As a further improvement of the present invention, the mowing head fixing piece includes a fixing piece body sleeved on the rotating shaft and an elastic pressing piece protruding from the fixing piece body along the rotating shaft, the fixing piece The body covers the wire insertion channel, and the elastic pressing piece acts on the straw rope to restrict the straw rope from moving toward a side close to the entrance of the passage. [0013] As a further improvement of the present invention, the channel outlet of the wire insertion channel is provided corresponding to the inner wall surface of the head shell so that the straw rope extends to the inner wall surface after passing through the elastic pressing piece.

[0014] As a further improvement of the present invention, the threading hole is a waist-type hole, and the waist-type hole extends axially along the rotation axis.

[0015] As a further improvement of the present invention, the number of the threading holes is two, which are symmetrically opened on the peripheral side of the head shell, and are used to simultaneously pass through and insert two free ends of the same straw rope The head shell is fixed internally; two of the wire insertion channels provided corresponding to the threading holes are symmetrically arranged along the rotation axis.

[0016] As a further improvement of the present utility model, an angle of a channel inlet and a channel outlet of each of the plug-in channels with respect to a central angle formed by the rotation shaft is less than 180 degrees.

[0017] In order to achieve another object of the above utility model, the present invention provides a grass trimmer, the grass trimmer includes a driving device, and the grass driving head described above is driven to rotate by the driving device.

[0018] The beneficial effects of the present utility model are: The weeding head of the present utility model adopts a brand-new double flange structure for the wire reel. With the cooperation of the transition channel, the wire is easier to coil, which solves the previous double-layer wire reel. That is, the winding of the three-flange surface structure may have a problem of winding only one side.

The beneficial effects of the invention

Brief description of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a schematic diagram of the overall structure of the weeding head of the present invention;

[0020] FIG. 2 and FIG. 3 are exploded views of different directions of the weeding head in FIG. 1, respectively;

[0021] FIG. 4 is a schematic diagram of the structure after the weeding head is removed from the cover in FIG. 1;

[0022] FIGS. 5 and 6 are enlarged schematic diagrams of different directions of the reel in FIG. 2 respectively;

7 is a cross-sectional view of the weeding head shown in FIG. 1 in the direction A-A;

8 is a cross-sectional view of the weeding head shown in FIG. 1 in a B-B direction;

9 is a cross-sectional view of the weeding head shown in FIG. 1 in the C-C direction;

[0026] FIG. 10 is a sectional view in the D-D direction in a normal working state of the weeding head shown in FIG. 1;

[0027] FIG. 11 is a cross-sectional view in the D-D direction of the weeding head shown in FIG.

Invention Examples Embodiments of the invention

[0028] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. However, this embodiment mode does not limit the present invention. Structural, method, or functional transformations made by those skilled in the art based on this embodiment are included in the protection scope of the present invention.

[0029] The mowing machine includes: a driving device, an operating device, and a mowing head 100. The mowing head 100 is used to install and store a mowing rope, and the mopping rope is partially contained inside the mowing head, and partially stretches out. The grass head 100 is used to cut vegetation when the grass head 100 is rotated. The operating device usually includes a handle, a battery pack, a control board, a connecting rod and other components; the driving device includes a motor and a driving shaft, and the driving shaft is connected to the mowing head 100 so as to be controlled by the operating device to drive the mowing head 100 to rotate.

[0030] With reference to FIG. 1, FIG. 2, and FIG. 3, the weeding head 100 provided by the present invention includes a rotating shaft 10, and a reel 20 and a head shell 30 with an axis of the rotating shaft 10 as a rotating shaft. The wire reel 20 is used to wind the straw rope, and the head shell 30 is used to receive the wire reel 20 and formed with a threading hole 313 for the straw wire to pass through; the wire reel 20 and the head shell 30 is optionally configured to be relatively rotated or relatively stationary; the rotating shaft 10 includes: a first rotating shaft 10a and a second rotating shaft 10b coaxially sleeved with each other, and the head shell 30 and the first rotating shaft 10a are integrally formed. The axis of the first rotating shaft 10a is used as the rotation axis during the operation of the weeding head 100, and the wire reel 20 and the second rotating shaft 10b are integrally formed. The axis of the rotation shaft 10 is a rotation shaft for rotation.

[0031] With reference to FIG. 4, FIG. 5, FIG. 6, and FIG. 7, the spool 20 includes: a winding portion 21 and a winding portion 21

Two flanges 23 at both ends of 21; the reel 20 is provided with at least one wire insertion channel 231, and the wire insertion channel 231 is provided with a channel inlet 2311 that cooperates with the threading hole 313, and one end of the straw rope It passes through the threading hole 313, the channel inlet 2311 in sequence and extends inside the wire insertion channel 231, and the part of the straw rope away from the wire insertion channel 231 extends toward the winding portion 21. It should be noted that the plugging channel 231 may be provided in various ways, that is, it may be cut off inside one of the two flanges 23 or may be provided through one of the two flanges 23.

[0032] In a specific embodiment of the present invention, for convenience of description, the flange 23 above the flange 23a near the driving device is expressed, the other flange 23 below the flange 23b is expressed, and the plug-in channel 231 It is arranged on the lower flange 23b.

[0033] Preferably, the wire insertion channel 231 is provided from one of the two flanges 23 and penetrates the winding portion 21; the plug The channel outlet 2313 of the line channel 231 is provided corresponding to the inner wall surface of the head shell 30 so that the straw rope extends to the inner wall surface; correspondingly, the free end of the straw rope passes through the threading hole 313, After the channel inlet 2311 extends in the patch channel 231, it extends from the channel outlet 2313 of the patch channel 231 to the inner wall surface of the head shell 30; During the internal threading process of the head shell 30, when it abuts against the head shell 30, its insertion end is fixed in the head shell 30, so that when the straw rope is exhausted and needs to be re-threaded, The free end of the straw rope is obtained at the passage exit 2313, and the remaining ends of the straw rope are taken out along the insertion direction of the insertion channel 231.

[0034] Preferably, as shown in combination with reference 4, the weeding head 100 further includes a transition channel 233 for defining a release path of the weed rope, and the transition channel 233 is located at the channel entrance 2311 away from the plug. One side of the wire channel 231, and the transition channel 233 communicates with the wire insertion channel 231.

[0035] In a specific embodiment of the present invention, the lower flange 23b includes a first end surface 235 and a second end surface 237 staggered, the first end surface 235 includes a first extended end surface 2351, and the second end surface 237 includes a second extended end surface 2371, the first extended end surface 2351 and the second extended end surface 2371 are located in a staggered area of the first end surface 235 and the second end surface 237; the channel inlet 2311 is located in the first extended end surface 2 Between 351 and the second extended end surface 2371; the first extended end surface 2351 and the second extended end surface 2371 cooperate with each other to form the transition channel 233.

[0036] Further, the second extended end surface 2371 includes a plane 23711 that is matched with and parallel to the first extended end surface 2351 and an inclined surface 23713 connecting the plane 23711. The plane 23711 and the inclined surface 2 3713 are An obtuse angle is formed therebetween, the inclined surface 23713 protrudes beyond the first extended end surface 2351, the first extended end surface 2351 and the plane 23711 define a first release path, and the inclined surface 23713 defines a second release path. In an implementable manner, the channel entrance 2311 is disposed between the first extension end surface 2351 and the plane 23711, and the plane 23711 and the bottom surface of the patch channel 231 are located on the same plane, so that the insertion The straw rope coming out of the line channel 21 will not have a direct angle change, but will come out along the way. On the one hand, the direction of the wire is controlled, and on the other hand, the wire is not suddenly tilted up to prevent the wire from being stuck.

[0037] The setting position of the channel inlet 2311 may be set on any surface of the first release path. In a preferred embodiment of the present invention, the transition channel 233 further includes: a first connection surface 2373 connecting the first extension end surface 2351 and the plane 23711 and extending along a first release path, connecting the first extension End surface 2351, the plane 23711, the second connection surface 2375 of the first connection surface 2373, the second connection A boundary area between the plane 23711 and the inclined surface 23713 connecting part of the plane 2375, and the channel entrance 2311 is opened at the first connecting plane 2373.

[0038] After the insertion end of the straw rope is fixed in the head shell 30, the extension of the straw rope and the insertion end passes through the first release path and the second release path in sequence, and then smoothly transitions to winding On the part 21, preparations are made for automatic winding, and the winding process of the straw rope will be described in detail below.

[0039] In a preferred embodiment of the present invention, the mowing head 100 further includes a mowing rope fixing piece 40, and the mooring rope fixing piece 40 and the insertion channel 231 cooperate with each other to limit the mowing The rope is detached from the insertion channel 231. In a specific mode of the present invention, the mowing rope fixing piece 40 is sleeved on the second rotating shaft 10b in an interference manner; further, the mowing head fixing piece 40 includes being sleeved on the second rotating shaft 10b. The fixing piece body 41 and the elastic pressing piece 43 protruding from the fixing piece body along the second rotating shaft 10b, the fixing piece body 41 covers the wire insertion channel 231, and the elastic pressing piece 43 functions as The straw rope restricts the straw rope from moving toward a side close to the passage entrance 2311. Specifically, the elastic pressing piece 43 is lifted along the threading direction toward the straw rope, so that the straw rope cannot be pulled out in the reverse direction; further, the fixing piece body 41 is close to the inside of the second rotating shaft 10b. A hoop portion 45 is formed on the surface, and the hoop portion 45 extends along the axial direction of the second rotating shaft 10b, and the hoop portion 45 and the second rotating shaft 10b abut each other so as to limit the space after the installation is completed. The fixing rope 40 for moving the straw is free to move in the axial direction of the second rotating shaft 10b; further, at least one limiting groove 47 is provided on the peripheral side of the fixing plate body 41, and the limiting groove 4 7 Cooperate with the limiting boss 25 on the lower flange 23b to limit the position of the mowing rope fixing piece 40 relative to the lower flange 23b, so that the mowing rope fixing piece 40 and the plug line The channel 231 cooperates to fix the insertion end of the mowing rope through the elastic pressing piece 43 to prevent the user from being injured by accidentally releasing all the mowing rope during the operation of the mowing machine.

[0040] In a preferred embodiment of the present invention, the number of the threading holes 313 is two, which are symmetrically opened on the peripheral side of the head shell 30, and are used for both free ends of the same straw rope to pass through at the same time. And inserted into the head shell 30 for fixing; correspondingly, the two insertion channels 231 corresponding to the threading holes 313 are symmetrically disposed along the rotation axis 10; thus achieving the purpose of single-strand double-threading; in the actual application process The two free ends of the straw rope are respectively inserted into the corresponding thread insertion channels 231 from the two symmetrical threading holes 313, and after passing through the corresponding elastic pressing pieces 43, they extend to the inner wall surface of the head shell 30 and cut off. After the wire is inserted, the wire reel 20 is rotated relative to the head cover 10 to wind the straw rope around the winding portion 21 until the straw rope is on the head shell 3 After the outer length of 0 is suitable for the length, the straw rope left on the outside of the head shell 30 is cut into two for grass trimming. When the straw rope is exhausted and needs to be rethreaded, directly obtain the exit 2313 and the head shell at the passage. The straw rope between the inner wall surfaces of 30, at this time, because the elastic pressing piece 43 does not restrict the straw rope from moving in the insertion direction of the insertion channel 231, so that the straw rope can be taken out at the channel exit 2313. Remaining thread ends. Of course, in other embodiments of the present invention, multiple sets of symmetrical threading holes 313 can also be set up according to the arrangement of the present invention, and a number of straw ropes corresponding to each group of threading holes 313 can be matched with it, and then Several straw ropes are arranged around the head shell for common use. In this preferred embodiment, the angle of the channel entrance 2311, the channel exit 2313 of each of the plug-in channels 231 with respect to the central angle formed by the rotating shaft 10 is less than 180 degrees, so that it is guaranteed to enter through the two threading holes 313 respectively. The two free ends of the same straw rope do not intersect after entering the corresponding insertion channel 231, thereby preventing the straw rope from being entangled inside the head shell 10.

[0041] In a preferred embodiment of the present invention, the mowing head 100 further includes a mating connection with the wire reel 20

An end cover 50 that drives the wire reel 20 to move; the end cover 50 uses the rotating shaft 10 as a rotation axis and is at least partially disposed outside the head shell 30. Specifically, a clamping groove 29 is provided on a side of the lower flange 23b remote from the upper flange 23a, and the head housing 30 is provided with an accommodation hole corresponding to a position where the lower flange 23b is provided with a clamping groove. The cover 50 is provided with a buckle 51. After the end cover 50 passes through the accommodation hole in the head cover 30, the buckle 51 on the cover 50 cooperates with the groove 29 on the lower flange 23b to fit the lower cover. The flange 23 b is fixedly connected to the end cover 50. In this embodiment, when the end cap 50 receives an external force, the end cap 50 can reciprocate along the axial direction of the rotation shaft 10 or rotate in the radial direction of the rotation shaft 10, thereby driving the spool 20 to move in the same direction. To complete the winding or unwinding of the straw rope.

[0042] In a preferred embodiment of the present invention, an automatic method of tapping and releasing a wire is used to wind and release a new grass-raising rope. Correspondingly, the grass-raising head 100 further includes: disposed on the head shell 30 and A spring 60 between the wire reels 20, the spring 60 urges the wire reels 20 so that the wire reels 20 move axially along the rotating shaft 10 relative to the head shell 30.

[0043] In a specific embodiment of the present invention, the spring 60 is sleeved on the first rotating shaft 10a, and is disposed between the head shell 30 and the upper flange 23a. The spring 60 is not deformed. After the end cap 50 is struck during the threading process, the end cap drives the wire coil 20 to move upward in the direction of the flange 23a in the axial direction of the first rotating shaft 10a. At this time, the head cap 10 is held in the axial direction of the rotating shaft 10 and is relatively stationary with the rotating shaft 10, and thus, the spring 60 provided between the head case 30 and the upper flange 23a is compressed, and the spring 60 is applied. Force the wire reel 20 away from the head shell 30.

[0044] Further, the weeding head 100 further includes: a washer 70 for reducing friction between the spring 60 and the head cover 30, and the washer 70 is disposed on the spring 60 and Between the head covers 30; in a specific embodiment of the present invention, the gasket 70 is sleeved on the rotating shaft 10.

[0045] Further, in combination with FIG. 8 and FIG. 9, in order to realize automatic winding and automatic winding of the weeding head 100, the weeding head 100 further includes: used to cooperate with the end cover 50 and the spring 60, for limiting a circumferential structure in which the wire reel 20 and the head shell 30 are relatively rotated or relatively stationary. The circumferential structure includes: blocking members 311 respectively disposed inside the head shell 30 and opposite to the two flanges 23, and two blocking members 311 respectively disposed on the two flanges 23, and respectively matched with the blocking members 311 The two holding members 27 are provided on the two flanges 23, and the holding members 27 are provided along the corresponding circumferential sides of the flange 23, and the blocking members 3 and 11 are respectively provided with the rotating shaft. A first blocking surface 3111 and a second blocking surface 3113 arranged in parallel with 10 axes; the abutment members 27 respectively have a resisting surface 271 arranged in parallel with the 10 axis of the rotating shaft, and the inclined surfaces intersecting with the 10 axis of the rotating shaft Transmission surface 273; With reference to FIG. 6, each of the transmission surfaces 273 has a first end 2731 disposed on an end surface of the flange 23, and a second end 2733 disposed opposite the first end 2731. In order to facilitate understanding, in the specific embodiment of the present invention, the circumferential structures provided on the flange 23a and the flange 23b are distinguished by a suffix "a" and a suffix "b", respectively.

[0046] when the first blocking surface 3111a is in contact with its corresponding resistance surface 271a, or when the first blocking surface _{31 1 1b} is in contact with its corresponding resistance surface 271b, the reel 20 and the head shell 30 are relatively stationary; when the second blocking surface 3113a is in contact with the transmission surface 273a, or when the second blocking surface 311 3b is in contact with the transmission surface 273b, or When the blocking member 311a and the resisting member 27a and the blocking member _3nb and the resisting member 27b are disengaged at the same time, the spool and the head case 30 are relatively rotated.

[0047] Preferably, the threading hole 313 is a waist-shaped hole, and the waist-shaped hole extends axially along the rotation shaft. With such a configuration, the reel 20 can be reciprocated in the axial direction of the rotation shaft 10 relative to the head shell 30. During the movement, the threading hole 313 and the channel inlet 2311 of the thread inserting channel 231 are kept in communication with each other; a buckle 3131 is provided on the threading hole to prevent abrasion of the straw rope passing through the threading hole.

[0048] In a specific embodiment of the present invention, as shown in FIG. 2 and FIG. 8, the head shell 30 includes: an upper cover 31a and a lower cover 31b which are detachably connected; the upper cover 31a is provided with an insert 33 The lower cover 31b is provided with a slot 35 that cooperates with the insert piece, so as to be used to fixedly connect the upper cover 31a and the lower cover 31b; The embodiment facilitates the assembly of the head shell 30 and the wire reel 20, and also facilitates the opening of the head shell 30 for maintenance or removal of the remaining part of the mowing rope; the opposite end surfaces of the upper cover 31a and the lower cover 31b are formed separately A first accommodating groove and a second accommodating groove to form an accommodating space for accommodating the wire reel 20 therebetween; a blocking member 311a is provided on a peripheral side of a bottom wall of the first accommodating groove, and the blocking member 311b It is disposed on the peripheral side of the bottom wall of the second accommodation groove. In addition, the upper cover 31a is provided with an air blade 315 outside the accommodation space formed with the lower cover 31b for heat dissipation.

[0049] During the threading of the straw rope, the two free ends thereof respectively pass through the corresponding threading holes 313, the channel inlets, and 2311 thereof, and extend through the elastic pressing piece 43 in the wire insertion channel 231 and pass through After abutting the upper cover 31a, the end cover 50 is rotated relative to the head cover 30, and the extension portion of the straw rope away from the free end passes through the first release path and the second release path in sequence and is wound around the winding portion 21 until After a length suitable for cutting is reserved on the outside of the head cover 31, it is divided into two to form two sections of straw ropes.

[0050] With reference to FIG. 10, in a normal working state of the lawnmower, the driving device drives the rotating shaft 10 to rotate forward to drive the upper cover 31a and the lower cover 31b to rotate forward at the same time, and the spring 60 is not deformed. The first blocking surface 3111b of the blocking member 311b and the blocking surface 271b of the blocking member 27b abut each other, and the lower cover 31b drives the end cover 50 and the wire reel 20 to rotate synchronously therewith.

[0051] With reference to FIG. 11, there are three states during the pay-off process. State 1: When the end cap 50 is struck, the end cap 50 drives the wire coil 20 to overcome the elastic force of the spring 60 from the axial direction of the rotation shaft 10 to the upper cover 31a direction. During movement, the blocking member 311 b is disengaged from the abutting member 27 b, and the reel 20 rotates forward at a reduced speed due to inertia, that is, the reel 20 is reversed relative to the lower cover 31 b, and the straw rope is released outward. State 2: When the first blocking surface 3111a of the blocking member 311a and the blocking surface 271a of the blocking member 27a abut each other, the upper cover 31a drives the end cover 50 and the wire reel 20 to rotate synchronously with it, and the pay-off stops. State 3, as the restoring force of the spring 60 is compressed, the spring 60 pushes the wire coil 20 to move in the direction of the cover 31b along the axial direction of the rotating shaft 10. At this time, the inertia effect of the wire coil 20 is again reduced to a positive speed. Turning, that is, the reel 20 is reversed with respect to the upper cover 31a, and the straw rope is released again until the blocking member 311b and the resisting member 27b resist each other, and a pay-off process ends; it can be understood that if After a pay-off process, the length released by the straw rope cannot meet the cutting requirements, then repeat the above steps for multiple pay-off processes.

[0052] After the straw rope is completely released, the upper cover 31a is removed, and the free end of the straw rope is withdrawn from the channel outlet 2313, in exchange for a new straw rope. It can be understood that, with respect to the above-mentioned operation process of the lawnmower, a driving device may be provided to drive the rotating shaft 10 to reverse. At this time, the automatic threading of the straw rope can be realized according to the above-mentioned releasing process. During the reversing process, the second blocking surface 3113b transitions from the first end 2731b to the second end 2733b of the transmission surface 273b, and after the second blocking surface 3113b abuts the second end 2733b The second process 2733b that is currently abutted is repeated until the winding is completed. Of course, the winding can also be realized through the cooperation of the second blocking surface 3113a and the transmission surface 273a, which will not be described in detail here.

[0053] In summary, the grass mowing head and the grass mowing machine provided with the utility model effectively prevent the user from completely turning the grass mowing rope by intention by providing two threading holes and a corresponding wire insertion channel. Inside the mowing head, the foolproof design of the mowing head is realized; the wire coil adopts a new double flange structure. With the cooperation of the transition channel, the mowing rope is easier to coil, which solves the previous double-layer wire coil, that is, The winding of the three-flange surface structure may have a problem of winding only one side. In addition, under the action of the fixing rope of the straw rope, the straw rope passes through the elastic pressing plate during the process of the straw rope passing through the wire insertion channel on the spool. The rope is fixed in the insertion channel to avoid reverse withdrawal and achieve unidirectional threading to avoid the risk of the straw rope being thrown out when the straw rope is exhausted. At the same time, a hoop is provided on the straw rope fixing piece to make it It fits tightly with the reel to avoid being lost due to the user's disassembly.

[0054] It should be understood that although this specification is described in terms of embodiments, not every embodiment includes only an independent technical solution. This description of the specification is merely for clarity, and those skilled in the art should take the specification as an example. As a whole, the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0055] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Anything made without departing from the technical spirit of the present invention All equivalent implementations or changes should be included in the protection scope of the present utility model.

Claims

Claim

[Claim 1] A weeding head, comprising: a rotating shaft, and a wire reel and a head shell with the axis of the rotating shaft as a rotating shaft, the wire reel is used to wind the weeding rope, and the head shell is used for accommodating The wire reel is formed with a threading hole through which the straw rope passes; the wire reel and the head shell are optionally configured to be relatively rotated or relatively stationary;

It is characterized in that the wire reel includes: a winding part and two flanges provided at both ends of the winding part; the wire reel is provided with at least one wire insertion channel, and the wire insertion channel is provided with a threading hole that cooperates with the threading hole; At the entrance of the passage, one end of the straw rope passes through the threading hole, the entrance of the passage and extends inside the insertion channel in sequence, and the part of the straw rope that is far from the insertion channel extends toward the winding portion. Wherein, the channel inlet is disposed on the flange near the head shell.

[Claim 2] The weeding head according to claim 1, wherein the wire insertion channel is provided on the flange near the head shell.

[Claim 3] The grass mowing head according to claim 1, wherein the grass mowing head further comprises a grass rope fixing piece, and the grass rope fixing piece and the wire insertion channel cooperate with each other to restrict The straw rope is detached from the wire insertion channel.

[Claim 4] The grass mowing head according to claim 3, wherein the grass mowing head fixing piece includes a fixing piece body sleeved on the rotating shaft and a fixing piece body protruding along the rotating shaft. An elastic pressing piece, the fixing piece body covers the wire insertion channel, and the elastic pressing piece acts on the straw rope to restrict the straw rope from moving toward a side close to the entrance of the passage.

[Claim 5] The grass mowing head according to claim 4, wherein a channel outlet of the wire insertion channel is provided corresponding to an inner wall surface of the head shell so that the grass mowing rope extends after passing through the elastic pressing piece. To the inner wall surface.

[Claim 6] The weeding head according to claim 1, wherein the threading hole is a waist hole, and the waist hole extends axially along the rotation axis.

[Claim 7] The weeding head according to claim 1, wherein the weeding head further comprises a transition channel for defining a release path of the straw rope, and the transition channel is located at the entrance of the channel A side far from the patch channel, and the transition channel communicates with the patch channel.

[Claim 8] The weeding head according to claim 1, wherein the flange includes a first end surface and a second end surface that are staggered, the first end surface includes a first extended end surface, and the first The two end surfaces include a second extended end surface, and the first extended end surface and the second extended end surface are located in a staggered area of the first end surface and the second end surface; the first extended end surface and the second extended end surface cooperate with each other to form The transition channel;

The second extended end surface includes a plane that is matched with and parallel to the first extended end surface and an inclined surface connecting the plane. An obtuse angle is formed between the plane and the inclined surface, and the inclined surface protrudes from the first An extension end surface, the first extension end surface and the plane defining a first release path, and the inclined surface defining a second release path; the channel inlet is disposed between the first extension end surface and the plane.

[Claim 9] The weeding head according to claim 8, wherein the transition channel further comprises: a first connection surface connecting the first extension end surface and the plane and extending along a first release path A second connecting surface connecting the first extension end surface, the plane, and the first connecting surface, a boundary area of the second connecting surface connecting portion between the plane and the inclined surface, and the passage entrance is opened at The first connection surface.

[Claim 10] The weeding head according to any one of claims 1 to 9, wherein the number of the threading holes is two, which are symmetrically opened on the peripheral side of the head shell for the same The two free ends of the straw rope are inserted through the head shell and fixed at the same time; two wire insertion channels provided corresponding to the threading holes are arranged symmetrically along the rotation axis.

[Claim 11] The weeding head according to claim 10, wherein an angle of a central angle formed by a channel inlet and a channel outlet of each of the patch channels with respect to the rotation axis is less than 180 degrees.

[Claim 12] A lawnmower, comprising: a driving device, and the lawnmower head according to any one of claims 1-11, which is driven to rotate by the driving device.