CN218007074U - Grass cutter - Google Patents

Abstract

The application discloses a mower, which comprises a mower body shell, a grass collecting box assembly and a rear row grass door assembly; a mowing cavity is formed inside the machine body shell, a mowing knife is installed on the mowing cavity, and a rotatable rear cover is installed outside the mowing cavity; the grass collecting box assembly is arranged at the rear side of the machine body shell and is communicated with the grass cutting chamber; the rear grass discharging door assembly is provided with a rotatable rear grass discharging door which can separate the grass box from the grass cutting chamber; the rotation axis X1 of the rear cover is parallel to the rotation axis X2 of the rear grass gate. The mower utilizes the rear grass-discharging door assembly to realize the switching of the grass chopping mode and the grass collecting mode; when the grass-cutting mode is adopted, grass scraps directly enter the grass-collecting box assembly through the grass-cutting chamber and the rear grass-discharging door, and when the grass-cutting mode is adopted, the grass scraps are sealed in the grass-cutting chamber by the rear grass-discharging door and continuously crushed until leaving the grass-cutting chamber.

Description

Grass cutter

Technical Field

The application relates to the technical field of mowers, in particular to a mower.

Background

A Lawn mower (also called as a weeder, a lawnmower, a Lawn trimmer and the like) is a mechanical tool for trimming lawns, vegetation and the like,

lawn mowers typically have three cutting modes: side discharge, grass collecting and grass chopping, and in order to achieve the expected grass chopping performance, a movable blocking structure is generally required to be added in the prior art. The blocking structure is closed in the grass chopping mode to block the grass collecting box and the grass mowing cavity, so that air flow in the cavity is improved, and the grass chopping effect is improved; and when the grass collection mode is in the grass collection mode, the grass collection box is opened to be communicated with the grass cutting chamber, so that grass clippings can be collected into the grass collection box by the grass cutting chamber. The existing blocking structure is a combination of a door with a horizontally arranged rotating shaft and a grass collecting channel inclined 45 degrees backwards, and has the following defects: the grass collecting channel is long, and the grass collecting channel is required to incline to the upper rear direction by 45 degrees, and when grass is collected, if airflow is not smooth, grass scraps can be accumulated in the channel when the grass is collected.

Therefore, how to provide a mower with a rear grass gate assembly that solves the above technical problems is a technical problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a mower, which utilizes a rear grass-discharging door assembly to realize the switching of grass chopping and grass collecting modes; and in the grass chopping mode, the grass clippings are enclosed in the grass chopping cavity by the rear grass discharge door and continuously crushed until leaving the grass chopping cavity.

To achieve the above object, the present application provides a lawn mower comprising:

the mowing machine comprises a machine body shell, a mowing mechanism and a power mechanism, wherein a mowing chamber is formed inside the machine body shell, a mowing knife is installed inside the machine body shell, a rotatable rear cover is installed outside the machine body shell, and the rear cover rotates around a rotating shaft;

the grass collecting box assembly is arranged on the rear side of the machine body shell, is communicated with the grass mowing cavity in a grass collecting mode and collects grass scraps;

the rear row grass door assembly is provided with a rotatable rear row grass door which can separate the communication between the grass collecting box assembly and the grass cutting chamber;

the rear grass discharging door is provided with an inner side face and an outer side face, the inner side face is a face facing the grass cutting chamber in a grass chopping mode, namely when the rear grass discharging door is closed, and the outer side face is opposite to the inner side face and is close to the rear cover in the opening direction of the rear grass discharging door;

a rotation axis X1 which is a rotation axis of the rear cover rotation shaft;

the rotation axis X2 is a rotation axis of the rear grass discharging door;

a rotation axis X3 which is a rotation axis of the mowing knife;

the rotation axis X2 is parallel to the rotation axis X1.

In some embodiments, the mowing chamber of the mower is a centrosymmetric structure, and the rotation axis X1 of the rear cover and the rotation axis X2 of the rear grass-discharging door are both perpendicular to the bisecting plane P1;

the median plane P1 passes through the rotation axis X3, and can cut the mower in the left-right direction, parallel to the front-back direction and the up-down direction, and perpendicular to the left-right direction.

In some embodiments, in the grass-collecting mode, i.e., when the rear grass gate is opened, the inner and lower boundaries of the rear grass gate are above the horizontal plane P2 where the rotation axis X1 is located;

wherein the horizontal plane P2 is parallel to the left-right direction and the front-rear direction, and is perpendicular to the up-down direction, and the rotation axis X1 of the rear cover is located within the horizontal plane P2.

In some embodiments, in the grass-collecting mode, i.e. when the rear grass gate is open, the inner side of the rear grass gate is above the level P2.

In some embodiments, the rotation axis X2 of the rear grass gate is located at the front side of the rotation axis X1 of the rear cover, and the rear grass gate assembly further includes an avoiding portion provided to the rear grass gate for avoiding a solid structure such as the rear cover rotation axis when the rear grass gate is opened.

In some embodiments, the rotation axis X2 of the rear grass gate is located on the lower front side of the rotation axis X1 of the rear cover.

In some embodiments, the rotation axis X2 of the rear grass gate is located on the rear side of the rotation axis X1 of the rear cover.

In some embodiments, the axis of rotation X1 of the rear cover coincides with the axis of rotation X2 of the rear grass gate.

In some embodiments, the inner side of the back row of grass doors is curved, and when the back row of grass doors are closed: the inner side surface of the rear row grass door and the inner wall of the machine body shell form a grass cutting cavity surrounding the grass cutting knife, and the curved surface of the rear row grass door is one section of the curved surface of the grass cutting cavity.

In some embodiments, the mowing chamber is divided into curved surfaces with various specifications in the up-down direction, the inner side surface of the rear row grass door is divided into curved surfaces with various specifications in the up-down direction, and the curved surfaces of the rear row grass door correspond to the curved surfaces of the mowing chamber in a one-to-one manner;

the grass collecting box assembly is provided with a grass box grass inlet upper plane and a grass box grass inlet lower plane, when the grass box assembly is installed, the grass box grass inlet upper plane can be covered by a rear cover, and the grass box grass inlet lower plane is communicated with the grass cutting chamber.

With respect to the background art discussed above, the present application provides a lawn mower that includes a body housing, a grass collection tank assembly, and a back row grass door assembly. A mowing cavity is formed in the machine body shell, a mowing knife is installed in the mowing cavity, a rotatable rear cover is installed outside the mowing cavity, and the rear cover rotates around a rotating shaft; the grass collecting box component is arranged at the rear side of the machine body shell and is communicated with the grass cutting cavity to collect grass scraps in a grass collecting mode; the rear row grass door assembly is provided with a rotatable rear row grass door which can separate the communication between the grass collecting box assembly and the grass cutting chamber; the rotation axis of the rear grass discharging door is parallel to the rotation axis of the rotation shaft of the rear cover.

During the operation of the mower, grass is cut by the action of the mower blade, and cut grass scraps are positioned in the machine body shell. Utilize back row grass door subassembly to realize the switching of garrulous grass and grass mode of gathering grass: and in the grass chopping mode, the grass clippings are enclosed in the grass chopping cavity by the rear grass discharge door and continuously crushed until leaving the grass chopping cavity.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a block diagram of a lawn mower provided by the present application in a grass cutting mode;

FIG. 2 is a block diagram of the mower provided by the present application in a grass-mowing mode;

FIG. 3 is a view from the direction B of FIG. 1;

FIG. 4 is a cross-sectional view of the rear row of the mower handle parallel to the bisecting plane P1 of the mower when in the grass chopping mode;

FIG. 5 is a cross-sectional view of the handle of the grass trimmer in the grass collecting mode parallel to the bisecting plane P1 of the mower;

FIG. 6 is a schematic diagram of the positions of X1 and X2 in the P1 plane, as provided herein;

FIG. 7 is an exploded view of a portion of a mower according to an embodiment of the present disclosure;

fig. 8 is a partial exploded view of a mower according to a second embodiment of the present disclosure;

fig. 9 is a partial exploded view of a lawnmower according to a third embodiment of the present application;

FIG. 10 is a partial cross-sectional view of a rear grass door handle of the lawn mower in the grass collecting mode according to an embodiment of the present invention, the partial cross-sectional view being parallel to a bisecting plane P1 of the lawn mower;

fig. 11 is a partial sectional view of the rear grass door handle of the mower according to the second embodiment of the present application, which is parallel to the bisecting plane P1 of the mower in the grass collecting mode;

fig. 12 is a partial sectional view of the rear grass door handle of the mower according to the third embodiment of the present application, which is parallel to the bisecting plane P1 of the mower in the grass collecting mode;

FIG. 13 is an exploded view of a third embodiment of a rear row grass door assembly provided herein;

FIG. 14 is a schematic view of the back row grass door assembly provided herein in a grass cutting mode, i.e., closed, operational position.

Wherein:

10-mower, 11-handle, 12-power switch, 13-grass collecting box component, 131-grass box grass inlet upper plane, 132-grass box grass inlet lower plane, 133-grass box handle, 14-rear cover, 141-rear cover inner side face, 15-rear wheel, 16-power device, 17-front wheel, 18-body shell, 19-side grass discharge port, 20-rear grass door component, 21-rear grass door handle, 22-rear grass door outer side, 23-rear grass door inner upper side, 231-rear grass door inner side boundary line, 24-rear grass door inner lower side, 241-rear grass door inner lower side boundary, 25-rear grass door positioning part, 26-torsion spring, 27-fastener, 28-lower side boundary midpoint, 29-avoiding part, 30-locking component, 31-locking part, 40-mowing chamber, 41-chamber top surface, 42-chamber middle curved surface, 43-chamber side curved surface, 50-mower blade, 60-rear cover, 61-rear grass door, mower rear cover, mower cover, rotary shaft X-1-mower rotary axis, rotary axis of rotary axis, and rotary axis of rotary axis R-3-mower.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to better understand the technical scheme of the present application, the following detailed description is provided for the person skilled in the art with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 7, in a first particular embodiment, the present application provides a lawn mower. The lower side of the body shell 18 of the mower is opened, a mowing chamber 40 is formed inside, and a mowing knife 50 is installed; a power unit 16 for providing cutting power to the mowing blade 50 is provided on the body housing 18, and the power unit 16 is located on the upper side of the body housing 18 in one embodiment; the power unit 16 may be an internal combustion engine, or may be a power unit such as an electric motor that can drive the mowing blade 50 to rotate around the rotation axis X3; front wheels 17 and rear wheels 15 are mounted on the front and rear sides of the body housing 18, respectively; the body housing 18 is provided with a push rod, which in one embodiment is located at the rear side of the body housing 18, and the push rod is provided with a handle 11 and a power switch 12 for controlling the power device 16 to start and stop.

In addition, the side of the body housing 18 of the mower is provided with a side grass discharge opening 19, and the side grass discharge opening 19 is positioned at the right side of the body housing 18 in one embodiment; the rear side of the machine body shell 18 is opened, the rear side is provided with a grass collecting box component 13 which is communicated with the grass cutting chamber 40 to collect grass scraps when in a grass collecting mode; a rotatable rear cover 14 is mounted on the rear side of the body housing 18, and the rear cover 14 rotates around a rear cover rotating shaft 60; the rear grass discharging door assembly 20 is arranged at the rear side of the machine body shell 18, the rear grass discharging door assembly 20 is provided with a rotatable rear grass discharging door, and the rear grass discharging door rotates around a rear grass discharging door rotating shaft 61; the grass collecting box assembly 13 is communicated with the grass cutting chamber 40 in the machine body shell 18 when the rear grass discharging door is opened, and the grass collecting box assembly 13 is separated from the grass cutting chamber 40 when the rear grass discharging door is closed.

The back row of grasses door is provided with an inner side surface and an outer side surface; the inner side surface is the surface facing the mowing chamber 40 in the grass chopping mode, namely when the rear grass discharge door is closed; the outer side is opposite the inner side, i.e., the side that is adjacent to the rear cover 14 in the opening direction of the rear grass gate. The rotation axis of the rear cover rotation shaft 60 of the rear cover 14 is a rotation axis X1, the rotation axis of the rear grass gate rotation shaft 61 of the rear grass gate is a rotation axis X2, the rotation axis of the mowing blade 50 is a rotation axis X3, and the rotation axis X1 is parallel to the rotation axis X2.

The mower 10 has three cutting modes of side grass discharge, grass collection and grass chopping. In the grass chopping mode, as shown in fig. 1 and 4, the side grass discharge port 19 is closed, the rear grass discharge door assembly 20 is closed, the lower plane 132 of the grass inlet of the grass box and the outer side 22 of the rear grass discharge door assembly 20 are positioned on the same side of the rear grass discharge door assembly 20, the grass cutting blade 50 acts, and the rotation direction is from the plane outside to the plane, so that grass is cut by the action of the grass cutting blade 50; in the side grass discharge mode, the side grass discharge port 19 is opened, the grass cutting blade 50 acts, and cut grass clippings are discharged out of the grass cutting chamber 40 when passing through the side grass discharge port 19 under the action of self inertia and cutting airflow R generated by the grass cutting blade 50; in the grass collecting mode, as shown in fig. 2 and 5, the rear row grass gate assembly 20 is opened, the rear row grass gate outer side 22 of the rear row grass gate assembly 20 is closely attached to the lower side of the rear cover inner side surface 141, the grass box grass inlet lower plane 132 is opposite to the inside of the machine body shell 18, the grass cutting blade 50 acts, and cut grass clippings are discharged into the grass collecting box assembly 13 through the grass discharge channel at the rear side of the machine body shell 18 under the action of self inertia and the cutting air flow R generated by the grass cutting blade 50. Grass clippings generated in the grass collection mode of the mower 10 directly enter the grass collection box assembly 13 through the machine body shell 18, and the movement path of the grass clippings is short, so that the situation of grass clippings accumulation is avoided.

Referring to fig. 1 and 2, fuselage housing 18 also mounts a locking assembly 30, with locking assembly 30 being located on a rear side of fuselage housing 18 in one embodiment; the rear row grass door assembly 20 is provided with a rear row grass door handle 21, and the rear row grass door handle 21 can be locked by a locking piece 31 in the locking assembly 30. As shown in FIG. 1, the rear grass door handle 21 is unlocked, the rear grass door assembly 20 is closed, and the mower 10 is in the grass cutting mode; as shown in FIG. 2, the rear grass gate assembly 20 is rotated to lock the rear grass gate handle 21, the rear grass gate assembly 20 is opened, and the lawn mower 10 is in the grass-collecting mode.

With continued reference to fig. 2, the median plane P1 passes through the rotation axis X3, and can bisect the mower 10 in the left-right direction, parallel to the front-rear direction and the up-down direction, and perpendicular to the left-right direction.

In the present embodiment, the mowing chamber 40 of the mower 10 has a bilaterally symmetrical structure with the median plane P1 as a symmetrical plane, the rotation axis X3 of the rotation shaft of the mowing blade 50 is parallel to the vertical direction and is located within the median plane P1, and both the rotation axis X1 of the rear cover rotation shaft 60 of the rear cover 14 and the rotation axis X2 of the rear grass gate rotation shaft 61 of the rear grass gate are parallel to the horizontal direction and are perpendicular to the median plane P1.

With continued reference to fig. 3, in one embodiment, the mowing blade 50 is in-line with the body housing 18 and the rear row of mowing door assemblies 20 forming a mowing chamber 40 that is circular in a bottom view, and the cutting airflow R generated by the mowing blade 50 moves in a counterclockwise direction in the bottom view.

With continued reference to fig. 5, the horizontal plane P2 is the horizontal plane behind the rotation axis X1, i.e., the back cover rotation axis X1 is located in the horizontal plane P2 and P2 is located on the rear side of the X1 axis, the horizontal plane P2 is parallel to the left-right direction and the front-rear direction, is perpendicular to the up-down direction, and the back cover rotation axis 60 of the back cover 14 is penetrated by the horizontal plane P2.

In the present embodiment, the rear grass gate rotation shaft 61 is located at the upper side of the rear grass gate, so that the rear grass gate assembly 20 rotates about the rear grass gate rotation shaft 61 at the upper side; the inner side of the rear grass-discharging door faces the machine body shell 18, and grass scraps are blocked in the grass-mowing chamber 40 when the rear grass-discharging door assembly 20 is closed; lower side border 241 is located the downside in the back row grass door of back row grass door, and at the grass collection mode, the back row grass door is located the top of horizontal plane P2 when opening to when the guarantee was opened at back row grass door subassembly 20, the grass bits can be along with the more smooth and easy inflow grass collection box subassembly 13 of cutting air current R and the hindrance not.

Further, except that the interior lower side boundary 241 of back row grass door, the medial surface of back row grass door, refer to fig. 7, the medial surface includes back row grass door internal side 23 and back row grass door internal side 24 at least, at the grass mode of collection, when back row grass door is opened, the medial surface all is located horizontal plane P2's top, no matter which position of back row grass door subassembly 20 when back row grass door subassembly 20 is opened this moment can not cause the hindrance to the inflow of grass bits, and then eliminate the influence of hindrance completely, the guarantee grass bits smoothly flow in.

Referring to fig. 6, fig. 6 is a schematic diagram of positions of X1 and X2 in the P1 plane provided by the present application.

It should be noted that the embodiment defines the parallel relationship between the rotation axis X1 and the rotation axis X2, and the spatial relationship between the rotation axis X1 and the rotation axis X2 has various spatial positions, such as fig. 6, taking the projection of the rotation axis X1 in the bisecting plane P1 as the origin, and the front, back, up and down of the lawn mower 10 as coordinate axes, so as to divide the bisecting plane P1 into two, three and four quadrants; in this case, the rotation axis X1 is located at the center, and the rotation axis X2 may be located at any position around the rotation axis X1, and may be located at a, b, c, d, e, f, g, etc. around the center. Wherein e is located at the upper side of the center, f is located at the first quadrant, g is located at the front side of the center, h is located at the second quadrant, d is located at the lower side of the center, c is located at the third quadrant, b is located at the rear side of the center, and a is located at the fourth quadrant.

Referring to fig. 7 and 10, fig. 7 is a partial exploded view of a lawn mower according to an embodiment of the present disclosure, and fig. 10 is a partial sectional view of a handle of a rear handle of the lawn mower parallel to a center parting plane P1 of the lawn mower in a grass collecting mode.

In the first embodiment, the rotation axis X2 is located in front of the rotation axis X1, and may be a quadrant f point, a positive front g point, and a quadrant h point shown in fig. 6; in this case, the rotation shaft 61 of the rear grass gate is positioned in front of the rotation shaft 60 of the rear cover 14, and both the rotation shaft 60 and the rotation shaft 61 may be provided on the body housing 18 or may be partially provided on the body housing 18.

In this embodiment, the back row grass door assembly 20 further comprises an avoiding portion 29 arranged on the back row grass door, and the back row grass door assembly 20 avoids solid structures such as a back cover rotating shaft 60 of the back cover 14 in the rotating process around a back row grass door rotating shaft 61, so that the interference influence is eliminated, the back row grass door assembly 20 can be completely opened after avoiding the solid structures, and the grass clippings can smoothly flow into the grass collecting box assembly 13 along the cutting airflow R.

Further, in the first embodiment, the rotation axis X2 may be a quadrant h point shown in fig. 6, and the rear flap rotation axis 61 of the rear flap is located at the lower front side of the rear flap rotation axis 60 of the rear flap 14.

Referring to fig. 8 and 11, fig. 8 is a partial exploded view of a lawn mower according to a second embodiment of the present disclosure, and fig. 11 is a partial sectional view of a handle of a rear handle of the lawn mower parallel to a center parting plane P1 of the lawn mower according to the second embodiment of the present disclosure.

In the second embodiment, the rotation axis X2 is located behind the rotation axis X1, and may be a three-quadrant c point, a positive rear b point, and a four-quadrant a point shown in fig. 6; in this case, the rear grass gate rotation shaft 61 of the rear grass gate is located on the rear side of the rear cover rotation shaft 60 of the rear cover 14, the rear cover rotation shaft 60 is provided on the body case 18, and the rotation shaft 1 is provided on the rear cover 14.

In this embodiment, the rotation of the back row grass gate assembly 20 is not interfered by the back cover rotating shaft 60, and an avoiding structure is not required to be arranged, so that the condition that the cutting airflow R is blocked by the avoiding structure is avoided, and the influence on the grass collecting performance is eliminated.

Referring to fig. 9 and 12, fig. 9 is a partial exploded view of a lawn mower according to a third embodiment of the present disclosure, and fig. 12 is a partial sectional view of a handle of a rear handle of the lawn mower parallel to a center parting plane P1 of the lawn mower according to the third embodiment of the present disclosure.

In the third embodiment, as a preferred embodiment, the rotation axis X1 and the rotation axis X2 are coaxially arranged, and the rotation axis 60 of the rear cover 14 coincides with the rotation axis 61 of the rear grass gate.

In the embodiment, the rear cover 14 and the rear grass discharge door share the same shaft, so that the structure is simplified and the cost is saved on the basis of ensuring the realization of the original functions.

Besides, for the independence of mode switching (grass cutting, grass collecting) and simplicity of structural design, in the eight positions shown in fig. 6, the preferred sequence is: c-d-b-h-g-f-e-a.

Referring to fig. 13, fig. 13 is an exploded view of a third embodiment of a rear row of grass gate assembly provided herein.

Illustratively, the rear grass door handle 21 is secured to the rear grass door assembly 20 by fasteners 27; except the outer side 22 and the inner side of the rear row grass gate, the side of the rear row grass gate component 20 is provided with a rear row grass gate positioning part 25, and the rear row grass gate positioning part 25 is limited by the machine body shell 18 when the rear row grass gate component 20 is closed in place; the torsion spring 26 is installed at the rotation axis 61 of the back grass door assembly 20, the torsion spring 26 provides the back grass door assembly 20 with a torque from the outer side 22 to the inner side around the rotation axis 61 of the back grass door, so that the back grass door positioning part 25 continuously abuts against the body shell 18 in the grass chopping mode of the back grass door assembly 20, and the back grass door assembly 20 is normally closed when not locked.

In some embodiments, the inner side of the backrow grass door is curved in shape, and when the backrow grass door is closed: referring to fig. 3 and 14, the inner side of the rear grass gate, which is a section of the curved surface of the grass cutting chamber 40, forms a closed grass cutting chamber 40 surrounding the grass cutting blade 50 together with the inner wall of the body housing 18.

In this embodiment, the rear row grass gate is a curved surface structure, and forms a complete grass cutting chamber 40 with other wall bodies inside the body housing 18 in the grass cutting mode, so as to ensure smooth cutting airflow R and good grass cutting performance.

Referring to fig. 14, fig. 14 is a schematic view of the rear row grass gate assembly provided in the present application in a grass cutting mode, i.e., closed operating state.

Furthermore, the mowing cavity is divided into curved surfaces with various specifications in the up-down direction, the inner side of the rear row grass door is divided into curved surfaces with various specifications in the up-down direction, and the various curved surfaces of the rear row grass door correspond to the various curved surfaces of the mowing cavity one by one.

For example, two curved surfaces are taken as an example, and the inner side surface of the back grass door assembly 20 is divided into a back grass door inner upper side 23 and a back grass door inner lower side 24 which are different curved surfaces; a rear grass gate inner side boundary line 231 is arranged between the rear grass gate inner upper side 23 and the rear grass gate inner lower side 24, the lower boundary of the rear grass gate inner lower side 24 is a rear grass gate inner lower side boundary 241, and the rear grass gate inner side boundary line 231 and the rear grass gate inner lower side boundary 241 are curves; the midpoint of the rear row grass gate inner-lower boundary 241 is the lower boundary midpoint 28.

Correspondingly, the mowing chamber 40 has a chamber middle curved surface 42 corresponding to the rear grass gate inner upper side 23 and a chamber side curved surface 43 corresponding to the rear grass gate inner lower side 24, in addition to the chamber top surface 41.

In this embodiment, in the grass chopping mode, the rear grass gate assembly 20 is in the closed state with the inner upper side 23 and the inner lower side 24 of the rear grass gate facing the grass cutter rotation axis X3, the inner upper side 23 of the rear grass gate being part of the chamber middle curved surface 42 and the inner lower side 24 of the rear grass gate being part of the chamber side curved surface 43; no matter the grass clippings flow through the curved surface 42 at the middle part of the attaching cavity or the curved surface 43 at the side edge of the attaching cavity, the smooth cutting airflow R can be guaranteed, and the grass chopping performance is good.

In addition, L1 is a connecting line between the upper left corner of the upper side 23 inside the rear grass discharging door and the lower left corner of the lower side 24 inside the rear grass discharging door, L2 is a connecting line between the upper right corner of the upper side 23 inside the rear grass discharging door and the lower right corner of the lower side 24 inside the rear grass discharging door, and the rotation axis X2 is located in the middle area of the curved surface projection, that is, the connecting line between the rotation axis X2 and the lower side boundary midpoint 28 falls between the two lines L1 and L2, and the description scope of the present embodiment should also be included as long as the connecting line meets the limitation.

Further, a line connecting the axis of rotation X2 to the lower boundary midpoint 28 bisects the interior of the rear grass door assembly 20 in the left-right direction in projection, and a line connecting the axis of rotation X2 to the lower boundary midpoint 28 bisects the interior of the rear grass door assembly 20 in one embodiment.

In some embodiments, the opening of grass-collecting box assembly 13 has top and bottom features. Specifically, the grass collecting box assembly 13 is provided with a grass box handle 133 outside, the front side of the grass collecting box assembly 13 is provided with a grass box grass inlet upper plane 131 and a grass box grass inlet lower plane 132, the rear cover inner side 141 of the rear cover 14 can cover the grass box grass inlet upper plane 131, and the grass box grass inlet lower plane 132 is communicated with the grass cutting chamber 40.

In this embodiment, when the rear grass discharge door is opened, the lower plane 132 of the grass inlet of the grass box is communicated with the machine body shell 18; when the rear grass discharging door is closed, the lower plane 132 of the grass inlet of the grass blocking box is communicated with the machine body shell 18.

It should be noted that many of the components mentioned in this application are either common standard components or components known to those skilled in the art, and their structure and principle are known to those skilled in the art through technical manuals or through routine experimentation.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The lawn mower provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.

Claims (10)

1. A lawn mower, comprising:

the mowing machine comprises a machine body shell, a mowing mechanism and a mowing mechanism, wherein a mowing chamber is formed inside the machine body shell, a mowing knife is installed inside the machine body shell, a rotatable rear cover is installed outside the machine body shell, and the rear cover rotates around a rear cover rotating shaft;

the grass collecting box assembly is arranged on the rear side of the machine body shell, is communicated with the grass cutting chamber in a grass collecting mode and collects grass scraps;

the rear row grass door assembly is provided with a rotatable rear row grass door which can separate the communication between the grass collecting box assembly and the grass cutting chamber;

the rear grass discharging door is provided with an inner side face and an outer side face, the inner side face is a face facing the grass cutting chamber in a grass chopping mode, namely when the rear grass discharging door is closed, and the outer side face is opposite to the inner side face and is close to the rear cover in the opening direction of the rear grass discharging door;

a rotation axis X1 which is a rotation axis of the rear cover rotation shaft;

the rotation axis X2 is a rotation axis of the rear grass discharging door;

a rotation axis X3 which is a rotation axis of the mowing knife;

characterized in that said rotation axis X2 is parallel to the rotation axis X1.

2. The mower of claim 1 wherein the mowing chamber of the mower is a centrally symmetric structure, and the rotation axis X1 of the rear cover and the rotation axis X2 of the rear grass gate are both perpendicular to the bisecting plane P1;

the median plane P1 passes through the rotation axis X3, and can cut the mower in the left-right direction, parallel to the front-back direction and the up-down direction, and perpendicular to the left-right direction.

3. A lawnmower according to claim 2, wherein, in the grass-collecting mode, i.e. with the rear grass gate open, the inner lower boundary of the rear grass gate is above the horizontal plane P2 on which the axis of rotation X1 lies;

wherein the horizontal plane P2 is parallel to the left-right direction and the front-rear direction, and is perpendicular to the up-down direction, and the rotation axis X1 of the rear cover is located within the horizontal plane P2.

4. A lawnmower as claimed in claim 3, wherein in the grass-collecting mode, when the rear row doors are open, the inner sides of the rear row doors are above the level P2.

5. A lawnmower as claimed in claim 3 or claim 4, wherein the axis of rotation X2 of the rear grass gate is located forwardly of the axis of rotation X1 of the rear cover, and the rear grass gate assembly further comprises an escape portion provided to the rear grass gate for avoiding a solid structure when the rear grass gate is open.

6. The mower according to claim 5, wherein the rotation axis X2 of the rear grass gate is located on a lower front side of the rotation axis X1 of the rear cover.

7. A lawnmower as claimed in claim 3 or claim 4, wherein the axis of rotation X2 of the rear grass gate is located to the rear of the axis of rotation X1 of the rear cover.

8. A lawnmower as claimed in claim 3 or claim 4, wherein the axis of rotation X1 of the rear cover coincides with the axis of rotation X2 of the rear grass gate.

9. A lawnmower as claimed in any one of claims 1 to 4, wherein the inner side of the rear grass gate is curved and when the rear grass gate is closed: the inner side surface of the rear row grass door and the inner wall of the machine body shell form a grass cutting cavity surrounding the grass cutting knife, and the curved surface of the rear row grass door is one section of the curved surface of the grass cutting cavity.

10. The mower of claim 9, wherein the mowing chamber is vertically divided into a plurality of curved surfaces, the inner side surface of the rear grass door is vertically divided into a plurality of curved surfaces, and the plurality of curved surfaces of the rear grass door correspond to the plurality of curved surfaces of the mowing chamber in a one-to-one manner;

the grass collecting box assembly is provided with a grass box grass inlet upper plane and a grass box grass inlet lower plane, when the grass box assembly is installed, the grass box grass inlet upper plane can be covered by a rear cover, and the grass box grass inlet lower plane is communicated with the grass cutting chamber.

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