CN218977312U

CN218977312U - Grass mowing head and grass mowing machine with same

Info

Publication number: CN218977312U
Application number: CN202222792384.8U
Authority: CN
Inventors: 焦名华
Original assignee: Zhejiang Sunseeker Industrial Co ltd
Current assignee: Zhejiang Sunseeker Industrial Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-05-09
Anticipated expiration: 2032-10-21

Abstract

The utility model provides a grass cutting head and a grass cutting machine with the grass cutting head, wherein the grass cutting head comprises a wire coil, the wire coil is configured to be capable of winding a grass cutting rope, the wire coil comprises a wire winding part, at least one channel is arranged on the wire winding part, the channel extends along the circumferential direction of the wire coil, and at least one channel port is formed in the channel; wherein, the passageway includes inner wall and outer wall, is equipped with the bulge in the passageway, and the bulge is located on inner wall or the outer wall, and the bulge forms the narrow part in the passageway. The grass cutting head can directly install the grass cutting rope from the outside, and is very simple and convenient; the grass cutting head is externally marked with a positioning arrow, and the positioning arrow is aligned with the wire inlet hole, so that the alignment of the channel opening and the wire inlet hole can be ensured, and when the grass cutting rope is inserted into the wire inlet hole, the grass cutting rope can be guided into the channel; the narrow part in the channel is matched with the end part of the channel opening, so that the thread end of the grass tying rope can be firmly fixed, and the grass tying rope can not be pulled out of the channel during wire winding.

Description

Grass mowing head and grass mowing machine with same

Technical Field

The utility model relates to the technical field of garden tools, in particular to a grass mowing head and a grass mowing machine with the grass mowing head.

Background

A grass trimmer, a hand-held tool commonly used for cutting weeds. In life, a common rotary grass trimmer mainly adopts a grass trimming rope made of fine nylon as a cutting tool. In the daily use of grass trimmer, the broken condition of grass trimmer rope can appear sometimes, and at this moment, need change broken grass trimmer rope, and the common grass trimmer rope of its grass trimmer is fixed in advance on its inside wire reel usually, therefore when the broken wire reel of grass trimmer rope inside needs to be dismantled and change, and the operation is troublesome, and it is very inconvenient to use.

Disclosure of Invention

The utility model aims to provide a grass mowing head which is used for solving the problems in the background technology.

The technical scheme adopted by the utility model for achieving the purpose is that the grass cutting head comprises a wire coil, wherein the wire coil is configured to be capable of winding a grass cutting rope, the wire coil comprises a winding part, at least one channel is arranged on the winding part, the channel extends along the circumferential direction of the wire coil, and at least one channel port is formed in the channel;

wherein, the passageway includes inner wall and outer wall, is equipped with the bulge in the passageway, and the bulge is located on inner wall or the outer wall, and the bulge forms the narrow part in the passageway.

Further, the channel is open on one side and has a distal wall therein.

Further, the extending angle of the passage in the circumferential direction is not less than 90 °.

Further, the channel extends at an angle of not less than 120 ° in the circumferential direction.

Further, the angle of extension of the throat to the passage opening in the circumferential direction is less than 45 °.

Further, the channel width gradually decreases from the channel opening to the narrowest point of the throat.

Further, a winding knob is arranged at the bottom of the wire coil.

Further, the bottom of the wire coil is also provided with a positioning arrow, and the position of the positioning arrow corresponds to the position of the passage opening.

Further, the wire coil is provided with two symmetrical channels.

Further, the wire winding device also comprises a lower shell, the bottom of the wire winding disc and/or the bottom of the lower shell are/is provided with directional arrows, the directional arrows are used for indicating the rotating direction of the wire winding, and the extending direction of the channel is opposite to the indicating direction of the directional arrows.

Further, the device also comprises a shell, a sliding block, wherein the sliding block and the wire coil are arranged in the shell, the sliding block is limited in the shell and can only reciprocate, the sliding block can not move to the outside of the shell, and a wire inlet hole for a grass mowing rope to penetrate is formed in the shell;

the shell comprises an upper shell and a lower shell, and the upper shell is detachably connected with the lower shell; the upper shell is of a cylindrical structure with an opening at the lower end, and the sliding block and the wire coil are hermetically encapsulated in the upper shell through the lower shell;

the lower shell is provided with a buckling piece, the side wall of the upper shell is correspondingly provided with two buckling holes, and when the lower shell and the upper shell are assembled, the buckling piece is buckled in the buckling holes, so that the sliding block and the wire coil are hermetically arranged in the upper shell;

the two ends of the winding part are provided with a first connecting part and a second connecting part, the winding part, the first connecting part and the second connecting part are all arranged in a round shape, and the diameters of the first connecting part and the second connecting part are larger than the diameter of the winding part, so that the grass rope can be limited between the first connecting part and the second connecting part;

the inner side of the top of the upper shell is provided with a positioning column which is arranged at the center of the upper shell and extends downwards, and the sliding block and the wire coil are sleeved on the positioning column; the inner side of the top of the upper shell is also provided with a sliding groove for installing a sliding block, the shape of the sliding groove is matched with that of the sliding block, the positioning column is positioned in the sliding groove, the sliding block is provided with a jack, the jack penetrates through the sliding block, the sliding block is inserted on the positioning column through the jack, one end of the sliding block is provided with an elastic piece, the elastic piece is clamped between the inner side wall of the upper shell and the sliding block, one end of the elastic piece is propped against the inner side wall of the upper shell, and the other end of the elastic piece is propped against the sliding block;

the top of the first connecting part is provided with a gear ring, the gear ring comprises an inner ratchet wheel and an outer ratchet wheel, the bottom of the sliding block is provided with a first lug and a second lug, and the first lug and the second lug can be meshed with the inner ratchet wheel and the outer ratchet wheel.

The utility model also provides a grass trimmer, which comprises a prime mover and the grass trimmer, wherein the output shaft of the prime mover is connected with the grass trimmer. The prime mover is configured as an electric motor or an internal combustion engine.

In summary, the beneficial effects of the utility model are as follows:

the grass cutting head can directly install the grass cutting rope from the outside, and is very simple and convenient. The grass cutting head is externally marked with a positioning arrow, and the positioning arrow is aligned with the wire inlet hole, so that the alignment of the channel opening and the wire inlet hole can be ensured, and when the grass cutting rope is inserted into the wire inlet hole, the grass cutting rope can be guided into the channel; the narrow part in the channel is matched with the end part of the channel opening, so that the thread end of the grass tying rope can be firmly fixed, and the grass tying rope can not be pulled out of the channel during wire winding. By the grass mowing head, when the grass mowing rope is broken, the grass mowing rope can be directly replaced from the outside of the grass mowing head, and any parts are not required to be detached.

Drawings

FIG. 1 is a schematic view of the overall structure of a grass cutting head;

FIG. 2 is an exploded view of the grass cutting head;

FIG. 3 is a cross-sectional view of the cord as it is wound around a reel;

fig. 4 is a cross-sectional view of a wire coil;

fig. 5 is a schematic diagram of the overall mechanism of the wire coil;

FIG. 6 is a schematic view of the bottom structure of the grass cutting head;

fig. 7 is a schematic view of the upper housing mounting slider.

Detailed Description

The following further details of embodiments of the present utility model with reference to the accompanying drawings, it should be noted that the examples are only illustrative of the utility model and should not be taken as limiting the utility model, and all the features disclosed in the examples of the present utility model, or all the steps in the methods or processes disclosed, can be combined in any way except mutually exclusive features and/or steps.

Example 1, refer to fig. 1-7.

The present embodiment provides a grass cutting head, including a wire reel 30, the wire reel 30 is configured to be capable of winding a grass cutting rope 50, the wire reel 30 includes a winding portion 97, at least one passage 89 is provided on the winding portion 97, the passage 89 extends along a circumferential direction of the wire reel 30, and the passage 89 has at least one passage opening 96. When the grass rope is installed, the thread end of the grass rope enters the channel 89 through the channel port 96, and after a section of the thread end of the grass rope enters the channel 89, the grass rope is wound on the winding part 97 of the wire coil 30 by rotating the wire coil 30, as shown in fig. 3.

Preferably, the channel 89 includes an inner wall 88 and an outer wall 87, with the protrusion 86 being provided in the channel 89, the protrusion 86 being provided on either the inner wall 88 or the outer wall 87, the protrusion 86 forming the slot 85 in the channel 89. The ends of the slot 85 and the passage opening 96 cooperate to secure the ends of the rope so that the rope will not be pulled out of the passage 89 during winding.

Preferably, the first connecting portion 98 and the second connecting portion 94 are disposed at two ends of the winding portion 97, the first connecting portion 98 and the second connecting portion 94 are all circular, and the diameters of the first connecting portion 98 and the second connecting portion 94 are larger than the diameter of the winding portion 97, so that the grass rope 50 can be limited between the first connecting portion 98 and the second connecting portion 94.

Preferably, the channel 89 is open on one side and the channel 89 has a distal wall therein. When the thread ends of the grass mowing rope are installed, the thread ends of the grass mowing rope are inserted into the channels 89 until the thread ends touch the tail end walls of the channels 89, the thread coils 30 are rotated again, and therefore the grass mowing rope can be wound more tightly.

In order to better represent the design parameters of the channel 89, some positions of the channel are named below: the end of the outer wall 87 at the position of the passage opening 96 is A, the rotation center of the grass-cutting head is O, the apex of the protruding part 86 is B, and the end of the passage 89 is C at the position of the inner wall 88.

Preferably, the angle of extension of the channel 89 in the circumferential direction, i.e. the above-mentioned +.aoc, is not less than 90 °, further not less than 120 °.

Preferably, the angle of extension of the slot 85 to the passage opening 96 in the circumferential direction, i.e. the above-mentioned +.aob, is less than 45 °.

Preferably, a winding knob 95 is provided at the bottom of the second connecting portion 94.

Preferably, the channel width tapers from the channel opening 96 to the narrowest point of the throat 85.

Preferably, the bottom of the wire coil 30 is further provided with a positioning arrow 91, and the position of the positioning arrow 91 corresponds to the position of the passage opening 96, so as to indicate the position of the passage opening 96.

Preferably, the spool 30 is provided with two symmetrical passages 89 that can be used to install two grass ropes 50.

Preferably, a grass cutting head further comprises a housing 60, a slider 20, wherein the slider 20 and the wire coil 30 are installed in the housing 60, the slider 20 is limited in the housing 60 and can only reciprocate, the slider 20 cannot move to the outside of the housing 60, and a wire inlet hole 99 for the grass cutting rope 50 to penetrate is formed in the housing 60. Specifically, the housing 60 includes an upper housing 10 and a lower housing 40, and the upper housing 10 is detachably connected to the lower housing 40. The upper casing 10 has a cylindrical structure with an opening at the lower end, and the slider 20 and the wire coil 30 are hermetically sealed in the upper casing 10 by the lower casing 40. The inside top of the upper shell 10 is provided with a positioning column 13, the positioning column 13 is arranged at the center of the upper shell 10 and extends downwards, and the slide block 20 and the wire coil 30 are sleeved on the positioning column 13. The inside spout 14 that is used for installing slider 20 that still is equipped with of top of last casing 10, the shape looks adaptation of spout 14 and slider 20, reference column 13 is located spout 14, be equipped with jack 21 on the slider 20, this jack 21 runs through slider 20 setting, slider 20 inserts through jack 21 and establishes on reference column 13, reference column 13 plays spacing effect to slider 20 in the course of the work, one end of slider 20 is equipped with elastic component 23, elastic component 23 is held between the inside wall of last casing 10 and slider 20, the one end of elastic component 23 supports and holds on the inside wall of last casing 10, the other end supports with slider 20. The top of the first connecting portion 98 is provided with a gear ring 93, the gear ring 93 comprises an inner ratchet 84 and an outer ratchet 83, the bottom of the slider 20 is provided with a first protruding block 25 and a second protruding block 26, and the first protruding block 25 and the second protruding block 26 can both be meshed with the inner ratchet 84 and the outer ratchet 83, so as to clamp the wire coil 30, and enable the wire coil 30 to rotate together with the housing 60. The automatic paying-off of the grass-cutting head according to the present utility model is realized by moving the slider 20 relative to the wire coil 30 and engaging the first and

second protrusions

25, 26 with the inner ratchet 84 and the outer ratchet ring 83, respectively, to realize the paying-off and stopping processes, and the structure of this part is already realized in the prior art, and will not be described herein.

The operator, by rotating the winding knob 95, can align the positioning arrow 91 with the wire entrance 99, at which point the passage port 96 is aligned with the wire entrance 99. One end of the rope is inserted into the entrance hole 99 and the end of the rope is guided into the passage 89 due to the alignment of the entrance hole 99 with the passage opening 96.

Preferably, a directional arrow 92 is provided on the bottom of the wire coil 30 and/or the bottom of the lower housing 40, the directional arrow 92 being used to indicate the direction of rotation of the wire winding, and the direction of extension of the channel 89 being opposite to the direction indicated by the directional arrow 92.

Preferably, the top of the upper case 10 is provided with a shaft hole 11 and a heat sink 12, and the shaft hole 11 is configured to be connected with an output shaft of the prime mover.

Preferably, the lower casing 40 is provided with a buckling piece 41, the side wall of the upper casing 10 is correspondingly provided with two buckling holes 17, and when the lower casing 40 is assembled with the upper casing 10, the buckling piece 41 is buckled in the buckling hole 17, so that the sliding block 20 and the wire coil 30 are hermetically installed in the upper casing 10. Further, the fastening member 41 is an elastic fastening member, so as to assemble and fix the lower housing 40 and the upper housing 10 by elastic deformation. Further, the lower housing 40 is provided with two buckling pieces 41, and the two buckling pieces 41 are symmetrically arranged.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model.

Example 2.

The present embodiment provides a grass trimmer, including a prime mover and a grass trimmer head in embodiment 1, wherein an output shaft of the prime mover is connected with a shaft hole 11 of the grass trimmer head. In some embodiments, the prime mover is configured as an electric motor. In other embodiments, the prime mover is configured as an internal combustion engine, typically such as a gasoline or diesel engine.

Other embodiments of this example are the same as example 1.

The foregoing is merely illustrative of specific embodiments of the utility model, and the scope of the utility model is not limited thereto, but is intended to cover any variations or alternatives not covered by the inventive subject matter, and therefore, the scope of the utility model is defined by the appended claims.

Claims

1. The grass cutting head is characterized by comprising a wire coil, wherein the wire coil is configured to be capable of winding a grass cutting rope, the wire coil comprises a winding part, at least one channel is arranged on the winding part, the channel extends along the circumferential direction of the wire coil, and at least one channel port is formed in the channel;

2. A grass cutting head as claimed in claim 1, wherein the channel is open on one side and has a distal wall therein.

3. A grass cutting head as claimed in claim 1, wherein the channel extends at an angle of not less than 90 ° in the circumferential direction.

4. A grass cutting head as claimed in claim 1, wherein the channel extends at an angle of not less than 120 ° in the circumferential direction.

5. A grass cutting head as claimed in claim 1, wherein the extent of the slot to the passage opening in the circumferential direction is less than 45 °.

6. A grass cutting head as claimed in claim 1, wherein the width of the passage from the opening to the narrowest of the slots is progressively reduced.

7. A grass cutting head as claimed in claim 1, wherein the bottom of the wire coil is provided with a winding knob.

8. A grass-cutting head as claimed in claim 1, wherein the bottom of the reel is further provided with a positioning arrow, the position of which corresponds to the position of the passage opening.

9. A grass cutting head as claimed in claim 1, wherein the wire coil is provided with two symmetrical channels.

10. A grass cutting head as claimed in claim 1, further comprising a lower housing, the bottom of the reel and/or the bottom of the lower housing being provided with directional arrows for indicating the direction of rotation of the winding, the direction of extension of the passage being opposite to the direction indicated by the directional arrows.

11. The grass cutting head as claimed in claim 1, further comprising a housing, a slider, the slider and the wire reel being mounted in the housing, the slider being restricted to reciprocal movement within the housing, the slider not being moved to the outside of the housing, the housing being provided with a feed hole for a grass cutting rope to pass through;

12. A grass trimmer characterized by comprising a prime mover and a grass trimmer head according to any one of claims 1-11, wherein an output shaft of the prime mover is connected to the grass trimmer head.