CN218977313U - Grass mowing head and grass mowing machine with same - Google Patents

Abstract

The utility model provides a grass cutting head and a grass cutting machine with the grass cutting head, which comprise a shell and a wire coil arranged in the shell, wherein the wire coil is connected with a holding part, the rotation axis of the grass cutting head is an axis X, the center point of the grass cutting head is O, a first plane F1 and a second plane F2 are planes perpendicular to the axis X, meanwhile, the first plane F1 is a tangential plane on one side of the shell close to the holding part, and the distance between the first plane F1 and the center point O of the grass cutting head is L1; meanwhile, the second plane F2 is a tangent plane of the holding part, and the distance between the second plane F2 and the center O point of the grass cutting head is L2; l2 is greater than L1, and the difference between L2 and L1 is not greater than 5mm; alternatively, L1 is greater than L2. According to the utility model, the holding part is improved, so that the holding part is not obviously protruded from the shell in visual effect, and the user is prevented from knocking the ground when using the grass-mowing head, so that the service life of the grass-mowing head is prolonged.

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 cutter, which is a hand-held tool for cutting weeds in lawns, gardens, pastures and the like. A large number of grass mowers on the market are equipped with knocking paying-off grass mowers, the winding knobs of the grass mowers are usually protruded out of the grass mowing head shell, and with the appearance of automatic paying-off grass mowers, the grass mowers do not need to be paid off by knocking the winding knobs, so that how the automatic paying-off grass mowers still follow the modeling design of the knocking paying-off grass mowers, the winding knobs are exposed out of the grass mowing head shell, users who are used to the knocking paying-off grass mowers can naturally consider the grass mowing heads to be knocking paying-off when seeing the winding knobs exposed out, and the grass mowing heads are knocked on the ground in the use process.

Because strike unwrapping wire formula grass head and automatic unwrapping wire grass head's inner structure difference, automatic unwrapping wire grass head inside does not have the spring assembly on the vertical direction, therefore when receiving to strike, beat the unwrapping wire grass head more fragile.

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 shell and a wire coil arranged in the shell, wherein the wire coil is configured to be capable of winding a grass cutting rope, the wire coil is connected with a holding part, and at least part of the holding part is not shielded by the shell and is exposed to the outside;

the rotary axis of the grass cutting head is an axis X, the center point of the grass cutting head is O, the first plane F1 and the second plane F2 are planes perpendicular to the axis X, meanwhile, the first plane F1 is a tangential plane on one side of the shell close to the holding part, and the distance between the first plane F1 and the center point O of the grass cutting head is L1; meanwhile, the second plane F2 is a tangent plane of the holding part, and the distance between the second plane F2 and the center O point of the grass cutting head is L2;

l2 is larger than L1, and the difference between L2 and L1 is not larger than 5mm; alternatively, L1 is greater than or equal to L2.

Further, the holding part and the wire coil are integrally arranged, and the holding part is formed by a concave structure at one end of the wire coil.

Further, L2 is greater than L1, and the difference between L2 and L1 is not greater than 3.5mm.

Further, the shell comprises an upper shell and a lower shell, the upper shell is detachably connected with the lower shell, and the upper shell and the lower shell are assembled to form a complete shell.

Further, the lower housing is closer to the grip portion than the upper housing, and the first plane F1 is a tangential plane on the lower housing.

Further, the wire reel includes a winding portion configured to wind up the grass rope;

the wire winding portion includes first wire winding portion and second wire winding portion, and first wire winding portion and second wire winding portion separate through cutting off, are equipped with the through wires hole in cutting off, and the grass rope of beating can penetrate in the through wires hole, and through wires hole one end is equipped with the first breach that communicates with first wire winding portion, and the through wires hole other end is equipped with the second breach that communicates with second wire winding portion, and first breach can make the grass rope of one side wind to first wire winding portion on, and the second breach can make the grass rope of opposite side wind to second wire winding portion on.

Further, the wire coil one end is equipped with the portion of gripping, and the other end is equipped with the ring gear, and the ring gear includes inboard ratchet and outside ratchet, and the grass-mowing head still includes the slider, is equipped with first lug and second lug on the slider, and first lug and second lug homoenergetic mesh with inboard ratchet and outside ratchet to block the wire coil, make wire coil and casing rotate together.

Further, go up the casing and be lower extreme open-ended cylinder tubular structure, slider and drum encapsulate through lower casing, make slider and drum be installed in the casing, the top inboard of going up the casing is equipped with the reference column, the reference column sets up centre of a circle position department at last casing and downwardly extending, slider and drum all overlap and establish on the reference column, the top inboard of going up the casing still is equipped with the spout that is used for installing the slider, the shape of spout and the shape looks adaptation of slider, the reference column is located the spout, be equipped with the jack on the slider, this jack runs through the slider setting, the slider passes through the jack and inserts and establish on the reference column, the reference column plays spacing effect to the slider in the course of the work, the one end of slider is equipped with the elastic component, the elastic component is held between the inside wall and the slider at last casing, the one end of elastic component supports on the inside wall of last casing, the other end and slider butt. The slider is restricted to the interior of the housing and can only reciprocate, and the slider does not move to the exterior of the housing.

Further, the buckling piece is arranged on the lower shell, two buckling holes are correspondingly formed in the side wall of the upper shell, 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 installed in the upper shell in a sealing mode.

The utility model also provides a grass trimmer, which comprises a motor and the grass trimmer, wherein the output shaft of the motor is connected with the grass trimmer.

In summary, the beneficial effects of the utility model are as follows: according to the grass cutting head, the holding part is improved, so that the grass cutting head cannot be obviously protruded out of the shell in visual effect, a user is prevented from knocking the ground when using the grass cutting head, and the service life of the grass cutting head is prolonged.

Drawings

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

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1 in one direction;

FIG. 4 is an exploded view of FIG. 1 in another direction;

fig. 5 is a schematic view of the winding portion in two directions at the time of winding.

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. 1-5.

The present embodiment provides a grass cutting head, including a housing 19 and a wire coil 30 installed in the housing 19, the wire coil 30 is configured to be capable of winding a grass cutting rope 50, the wire coil 30 is connected with a holding portion 80, at least a partial area of the holding portion 80 is not covered by the housing 19 and is exposed to the outside, a user can wind the grass cutting rope 50 by rotating the holding portion 80, and the length of the grass cutting rope 50 extending out of the grass cutting head is adjusted according to actual use conditions. In order to avoid that the grass-cutting head of the utility model is mistakenly considered to strike the paying-off grass-cutting head, referring to fig. 2, an axis X is a rotation axis of the grass-cutting head, an O point is a center point of the grass-cutting head (the center point refers to a grass-cutting machine body center or a junction point of a height 1/2 position and a length 1/2 position), a first plane F1 and a second plane F2 are planes perpendicular to the axis X, wherein the first plane F1 is a tangent plane on one side of a shell 19 close to a holding part 80, and a distance between the first plane F1 and the center O point of the grass-cutting head is L1; the second plane F2 is a tangential plane of the holding portion 80, a distance between the second plane F2 and a point O at the center of the grass cutting head is L2, in the present utility model, L2 is greater than L1, and a difference between L2 and L1 is within 5mm (not greater than 5mm, including 5 mm), or L1 is greater than or equal to L2, and the holding portion 80 is embedded in the housing 19. The above design makes the grip 80 not protrude from the lower housing 40 significantly in visual effect, avoiding the user from striking the ground when using the grass-cutting head of the present utility model, thereby prolonging the service life of the grass-cutting head.

Preferably, the holding portion 80 is integrally provided with the wire coil 30, so that the holding portion 80 drives the wire coil 30 to rotate together when rotating. Further, the holding portion 80 is formed of a concave structure at one end of the wire coil 30 to facilitate the holding by the user.

Preferably, L2 is greater than L1, and the difference between L2 and L1 is within 3.5mm (not greater than 3.5mm, including 3.5 mm).

Preferably, the housing 19 includes an upper housing 10 and a lower housing 40, the upper housing 10 is detachably connected with the lower housing 40, the upper housing 10 and the lower housing 40 are assembled to form a complete housing 19, a shaft hole 11 and a heat sink 12 are provided at the top of the upper housing 10, and the shaft hole 11 is configured to be connected with an output shaft of the motor. Further, in the grass-cutting head installation, the lower housing 40 is closer to the holding portion 80 than the upper housing 10, so the first plane F1 is a tangential plane on a side of the housing 19 close to the holding portion 80, that is, a tangential plane on the lower housing 40, referring to fig. 2.

Preferably, the wire coil 30 includes a winding portion configured to wind the straw rope 50. In this embodiment, the winding portion includes a first winding portion 88 and a second winding portion 87, the first winding portion 88 and the second winding portion 87 are separated by the partition 66, a threading hole 65 is formed in the partition 66, the grass mowing rope 50 can penetrate into the threading hole 65, a first notch 64 communicated with the first winding portion 88 is formed at one end of the threading hole 65, a second notch 63 communicated with the second winding portion 87 is formed at the other end of the threading hole 65, the first notch 64 can enable one side of the grass mowing rope 50 to be wound on the first winding portion 88, the second notch 63 can enable the other side of the grass mowing rope 50 to be wound on the second winding portion 87, and the two sides of the grass mowing rope 50 can be wound on different positions, so that the grass mowing rope 50 is not easy to wind up.

Preferably, one end of the wire coil 30 is provided with the holding part 80, the other end is provided with the gear ring 93, the gear ring 93 comprises an inner ratchet wheel 84 and an outer ratchet wheel 83, the grass-cutting head further comprises a sliding block 20, the sliding block 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 be meshed with the inner ratchet wheel 84 and the outer ratchet wheel 83, so that the wire coil 30 is clamped, and the wire coil 30 rotates together with the shell 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.

Preferably, the upper housing 10 has a cylindrical structure with an opened lower end, and the slider 20 and the wire coil 30 are enclosed by the lower housing 40 such that the slider 20 and the wire coil 30 are mounted in the housing 60. 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 in 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 on the inside wall of last casing 10, the other end and slider 20 butt. The slider 20 is restricted to the inside of the housing 60 to reciprocate only, and the slider 20 does not move to the outside of the housing 60.

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.

Preferably, the housing 60 is provided with two wire holes 99 through which the straw rope 50 is inserted and discharged.

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 take-up.

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 embodiment provides a grass trimmer, which comprises a motor and a grass trimmer head in the embodiment 1, wherein an output shaft of the motor is connected with a shaft hole 11 of the grass trimmer head.

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 (10)

1. The grass cutting head is characterized by comprising a shell and a wire coil arranged in the shell, wherein the wire coil is configured to be capable of winding a grass cutting rope, the wire coil is connected with a holding part, and at least part of the holding part is not shielded by the shell and is exposed to the outside;

the rotary axis of the grass cutting head is an axis X, the center point of the grass cutting head is O, the first plane and the second plane are planes perpendicular to the axis X, meanwhile, the first plane is a tangential plane on one side of the shell close to the holding part, and the distance between the first plane and the center point O of the grass cutting head is L1; meanwhile, the second plane is a tangent plane of the holding part, and the distance between the second plane and the center O point of the grass cutting head is L2;

l2 is greater than L1, and the difference between L2 and L1 is not greater than 5mm; alternatively, L1 is greater than or equal to L2.

2. A grass cutting head as claimed in claim 1, wherein the gripping portion is integrally formed with the wire coil, the gripping portion being formed by a concave structure at one end of the wire coil.

3. A grass cutting head as claimed in claim 1, wherein L2 is greater than L1 and the difference between L2 and L1 is not greater than 3.5mm.

4. A grass cutting head as claimed in claim 1, wherein the housing includes an upper housing and a lower housing, the upper housing being removably connected to the lower housing, the upper housing being assembled with the lower housing to form a complete housing.

5. A grass cutting head as claimed in claim 4, wherein the lower housing is closer to the gripping portion than the upper housing, and the first plane is a tangential plane on the lower housing.

6. A grass cutting head as claimed in claim 1, wherein the wire coil includes a winding portion configured to wind a grass rope;

the wire winding portion includes first wire winding portion and second wire winding portion, and first wire winding portion and second wire winding portion separate through cutting off, are equipped with the through wires hole in cutting off, and the grass rope of beating can penetrate in the through wires hole, and through wires hole one end is equipped with the first breach that communicates with first wire winding portion, and the through wires hole other end is equipped with the second breach that communicates with second wire winding portion, and first breach can make the grass rope of one side wind to first wire winding portion on, and the second breach can make the grass rope of opposite side wind to second wire winding portion on.

7. A grass cutting head as claimed in claim 4, wherein the wire coil is provided with a gripping portion at one end and a gear ring at the other end, the gear ring including an inner ratchet wheel and an outer ratchet wheel, the grass cutting head further including a slider provided with a first projection and a second projection, the first projection and the second projection being engageable with the inner ratchet wheel and the outer ratchet wheel to lock the wire coil and rotate the wire coil with the housing.

8. The grass cutting head as claimed in claim 7, wherein the upper housing is of a cylindrical structure with an opening at a lower end, the slider and the wire coil are packaged through the lower housing, so that the slider and the wire coil are mounted in the housing, a positioning column is arranged on the inner side of the top of the upper housing, the positioning column is arranged at the center of the upper housing and extends downwards, the slider and the wire coil are sleeved on the positioning column, a sliding groove for mounting the slider is further formed on the inner side of the top of the upper housing, the shape of the sliding groove is matched with that of the slider, the positioning column is positioned in the sliding groove, a jack is formed in the slider, the jack penetrates the slider, the slider is inserted on the positioning column through the jack, the positioning column plays a limiting role on the slider in the working process, one end of the slider is provided with an elastic piece, the elastic piece is clamped between the inner side wall of the upper housing and the slider, one end of the elastic piece abuts against the inner side wall of the upper housing, the other end of the elastic piece abuts against the slider, the slider is limited in the housing, and only reciprocates, and the slider cannot move to the outside the housing.

9. A grass cutting head as claimed in claim 7, wherein the lower housing is provided with a fastener, the side wall of the upper housing is provided with two corresponding fastening holes, and when the lower housing is assembled with the upper housing, the fastener is fastened in the fastening holes, so that the slider and the wire coil are mounted in the upper housing in a sealing manner.

10. A grass trimmer characterized by comprising a motor and a grass trimmer head according to any one of claims 1-9, wherein an output shaft of the motor is connected with the grass trimmer head.

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