阅读说明：本技术 一种用于割草机的刀片更换结构 (Blade replacing structure for mower ) 是由 吴晓飞 周国扬 刘楷 汪洋 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种用于割草机的刀片更换结构,包括刀盘,其中心为主轴连接部分,刀盘的盘周上设有多个刀片固定机构,每个刀片固定机构均包括第一元件,与所述刀盘固定连接,第一元件内部设有腔室；插槽,设置在第一元件上远离所述主轴连接部分的一侧,所述插槽与所述腔室相连通；刀片,具有插接部,所述插接部能够通过所述插槽伸入所述腔室中；第二元件,活动设置在第一元件的所述腔室内；第一弹性部件,设置在所述第二元件和所述腔室的腔壁之间,提供一个竖向预应力,使第二元件与所述刀片的插接部相配合,以将刀片限位在刀盘上。本发明通过弹性元件限位刀片并保证刀片因外部工况变化而脱落,保证安全性。(The invention discloses a blade replacing structure for a mower, which comprises a cutter head, wherein the center of the cutter head is a main shaft connecting part, a plurality of blade fixing mechanisms are arranged on the periphery of the cutter head, each blade fixing mechanism comprises a first element which is fixedly connected with the cutter head, and a cavity is arranged in the first element; the slot is arranged on one side of the first element far away from the spindle connecting part and communicated with the cavity; the blade is provided with a plug part, and the plug part can extend into the cavity through the slot; a second element movably disposed within the cavity of the first element; the first elastic component is arranged between the second element and the cavity wall of the cavity and provides a vertical prestress, so that the second element is matched with the insertion part of the blade to limit the blade on the cutter head. The invention limits the blade through the elastic element and ensures that the blade falls off due to the change of external working conditions, thereby ensuring the safety.)

1. The utility model provides a blade replacement structure for lawn mower, includes the blade disc, and its center is main shaft connecting portion, is equipped with a plurality of blade fixed establishment on the dish week of blade disc, and its characterized in that, every blade fixed establishment all includes:

the first element is fixedly connected with the cutter head, and a cavity is arranged in the first element;

the slot is arranged on one side of the first element far away from the spindle connecting part and communicated with the cavity;

the blade is provided with a plug part, and the plug part can extend into the cavity through the slot;

a second element movably disposed within the cavity of the first element;

the first elastic component is arranged between the second element and the cavity wall of the cavity and provides a vertical prestress to ensure that the second element is matched with the insertion part of the blade so as to limit the blade on the cutter head;

and the plug element is arranged in the cavity and used for limiting the stroke of the second element.

2. The blade replacement structure for a lawn mower according to claim 1, wherein said first elastic member is a spring;

a spring accommodating cavity for accommodating the spring is arranged in the cavity of the first element;

and the second element is provided with a spring connecting groove which is abutted against the spring.

3. The blade replacement structure for a lawnmower according to claim 1, further comprising a locking mechanism for locking a relative position between the second element and the blade insertion part, comprising:

a boss provided on the second element;

a stepped portion provided on a cavity wall of the first element;

the second elastic component is arranged between the cavity of the first element and the second element, the second element is under the elastic prestress of the second elastic component, and the protruding part is abutted against the step part on the wall of the first element cavity, so that the blade cannot automatically fall off.

4. The structure of claim 3, wherein the blade is provided with a mounting hole in the insertion portion, and the second member is provided with a fixing portion coaxially disposed with the mounting hole.

5. The blade replacing structure for a lawn mower according to claim 3, wherein a side of said protruding portion contacting said stepped portion is provided with a guide slope.

6. The blade replacing structure for a lawn mower according to claim 3, wherein said second elastic member is a torsion spring;

the second element is provided with a butting part which is butted with a torsion arm at one side of the torsion spring;

and a connecting part connected with the torsion arm at the other side of the torsion spring is arranged on the cavity wall of the first element.

7. The blade changing structure for a lawn mower according to claim 1, wherein said first member is provided with an opening at one end, and said plug member is detachably attached to said opening.

8. The blade changing structure for a lawn mower according to claim 7, wherein the plug member comprises a plug body, the plug body is of a cylindrical structure, one end of the plug body is hollow and forms an outer boss, an inner boss is arranged in the outer boss, the outer boss is higher than the inner boss, the end of the inner boss is arranged in the outer boss, and the outer boss and the inner boss form a step difference.

9. A detaching member for a blade replacing structure for a lawn mower according to any one of claims 1 to 8, comprising:

a hand-held portion;

a vertical extension part, one end of which is connected with the handheld part;

the first element is provided with a jack, and the vertical extending part can extend into the cavity through the jack and is connected with the second element.

10. The removable element according to claim 9, wherein the second element is provided with a shaft hole coaxially arranged with the vertical extension portion, and the vertical extension portion is in threaded connection with the shaft hole.

11. A dismounting element according to claim 9, characterized in that said vertical extension is provided with an enlarged diameter portion adjacent to said holding portion, said first element is provided with a stop portion, and said enlarged diameter portion cooperates with said stop portion to stop the torsion process of the dismounting element.

Technical Field

The invention relates to mowing equipment, and particularly discloses a blade replacing structure for a mower.

Background

The intelligent mowing robot is widely popularized, and achieves the mowing purpose through high-speed rotation of the blade. The blades are pre-installed on the cutter head, and when the blades are used for a period of time or are damaged and the mowing effect is poor, the old blades need to be replaced by new blades.

Lawn mowing robot blades are generally fastened to the cutterhead by screws, and replacement of the blades by the user requires the use of special tools to remove the screws, place the new blades in the original position and re-fasten the screws.

Patent CN204860069U mentions the use of springs and pins to secure the blade, and the blade can be removed without the use of tools.

The prior art has the following technical problems: the use of screws for fastening makes it inconvenient to remove the blade and requires a long time for the user to replace. In addition, when the screw is not detached for a long time, the screw may be tightly combined with the cutter head, so that the screw cannot be detached. The blade is fastened by using a spring and a pin, and the risk of falling off of the blade exists.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a blade replacing structure for a mower, which can reduce the risk of blade falling.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a blade changing structure for a lawn mower, comprising:

blade disc, its center is main shaft connecting portion, is equipped with a plurality of blade fixed establishment on the dish week of blade disc, and every blade fixed establishment all includes:

the first element is fixedly connected with the cutter head, and a cavity is arranged in the first element;

the slot is arranged on one side of the first element far away from the spindle connecting part and communicated with the cavity;

the blade is provided with a plug part, and the plug part can extend into the cavity through the slot;

a second element movably disposed within the cavity of the first element;

the first elastic component is arranged between the second element and the cavity wall of the cavity and provides a vertical prestress to ensure that the second element is matched with the insertion part of the blade so as to limit the blade on the cutter head;

and the plug element is arranged in the cavity and used for limiting the stroke of the second element.

The first elastic component is a spring;

a spring accommodating cavity for accommodating the spring is arranged in the cavity of the first element;

and the second element is provided with a spring connecting groove which is abutted against the spring.

Further comprising a locking mechanism for locking the relative position between the second element and the blade insertion part, comprising:

a boss provided on the second element;

a stepped portion provided on a cavity wall of the first element;

the second elastic component is arranged between the cavity of the first element and the second element, the second element is under the elastic prestress of the second elastic component, and the protruding part is abutted against the step part on the wall of the first element cavity, so that the blade cannot automatically fall off.

The inserting part of the blade is provided with a mounting hole, and the second element is provided with a fixing part which is coaxial with the mounting hole.

And one side of the protruding part, which is contacted with the step part, is provided with an inclined plane for guiding.

The second elastic part is a torsion spring;

the second element is provided with a butting part which is butted with a torsion arm at one side of the torsion spring;

and a connecting part connected with the torsion arm at the other side of the torsion spring is arranged on the cavity wall of the first element.

The first element is provided with an opening at one end, and the opening is detachably connected with the plug element.

The invention further discloses a detaching element for the blade replacing structure of the mower, which comprises the following components:

a hand-held portion;

a vertical extension part, one end of which is connected with the handheld part;

the first element is provided with a jack, and the vertical extending part can extend into the cavity through the jack and is connected with the second element.

And the second element is provided with a shaft hole which is coaxial with the vertical extension part, and the vertical extension part is in threaded connection with the shaft hole.

The position, close to the handheld portion, of the vertical extending portion is provided with an expanding portion, a stopping portion is arranged on the first element, and the expanding portion is matched with the stopping portion to achieve stopping of the torsion process of the dismounting element.

Has the advantages that:

according to the blade replacing structure for the mower, the blade is limited by the elastic element, and the blade is prevented from falling off due to external working condition change, so that the safety is guaranteed. By means of a separate dismounting element, a quick dismounting mounting of the blade can be achieved.

Drawings

FIG. 1 is a bottom view of a lawn mower according to an embodiment of the present invention;

FIG. 2 is a front view of the cutter head;

FIG. 3 is a perspective view of the cutter head;

FIG. 4 is a view of the cutter head in use;

FIG. 5 is a cross-sectional view of the cutter head and blade retention mechanism;

FIG. 6 is a schematic view of a blade securing mechanism;

wherein, 1 is a dismounting element, 2 is a first element, 3 is a second element, 4 is a plug element, 5 is a first elastic element, 6 is a second elastic element, and 7 is a blade.

FIG. 7 is a partial detail view of the blade securing mechanism;

wherein 211 is a stop part, 212 is a mounting groove, 213 is a connecting part, 214 is a step part, and 215 is a first element opening;

FIG. 8 is a schematic view of the construction of the removal element of the present invention;

wherein 111 is a handheld part, and 112 is an expanding part; 113 is a vertical extension;

FIG. 9 is a schematic view of the removal element in connection with the blade securing mechanism;

FIG. 10 is a schematic structural view of a second element of the present invention;

wherein 311 is a convex part, 312 is a spring connecting groove, 313 is an abutting part, and 314 is a shaft hole;

FIG. 11 is a schematic view of the connection structure of the second element and the second elastic member according to the present invention;

wherein 217 is a connecting part;

FIG. 12 is a schematic view of the construction of the plug element of the present invention;

wherein 411 is an outer boss, 412 is an inner boss, 413 is a plug main body, and 414 is a hexagonal head.

Detailed Description

Examples

As shown in fig. 1, 2 and 3, a lawn mowing robot is a schematic structural diagram of the whole machine, and a cutter head is installed at the bottom of the lawn mowing robot. A plurality of blade fixing mechanisms are uniformly distributed on the cutter head. Fig. 4 shows a blade securing mechanism.

Blade disc, its center is main shaft connecting portion, and the dish of blade disc is equipped with a plurality of blade fixed establishment all around, and every blade fixed establishment all includes:

the first element 2 is fixedly connected with the cutter head, and a cavity is arranged inside the first element 2;

a slot provided on the first element 2 on a side remote from the spindle connection, the slot communicating with the chamber;

a blade 7 having a socket portion which is capable of extending into the chamber through the slot;

a second element 3, movably arranged in said cavity of the first element 1;

the first elastic component 5 is arranged between the second element 3 and the cavity wall of the cavity and provides a vertical prestress, so that the second element 3 is matched with the insertion part of the blade 7 to limit the blade 7 on the cutter head;

a plug element 4 for limiting the stroke of the second element 3 is arranged in the cavity.

In this embodiment, the first elastic member is a spring;

further, a spring accommodating cavity for accommodating the spring is arranged in the cavity of the first element 2;

further, a spring connecting groove abutting against the spring is arranged on the second element 3.

Further comprising a locking mechanism for locking the relative position between the second element 3 and the blade insertion part, comprising:

a boss 311 provided on the second member 3;

a step portion 214 provided on the cavity wall of the first element 2;

the second elastic component 6 is arranged between the cavity of the first element 2 and the second element 3, and the protruding part 214 of the second element 3 is abutted against the step part 214 on the cavity wall of the first element 2 under the elastic prestress of the second elastic component 6, so that the blade cannot fall off automatically.

The inserting part of the blade 7 is provided with a mounting hole, and the second element 3 is provided with a fixing part which is coaxial with the mounting hole.

Further, a guiding inclined surface is provided on a side of the protruding portion 311 contacting the stepped portion 214.

Further, the second elastic component 6 is a torsion spring;

the second element 3 is provided with a butting part which is butted with a torsion arm at one side of the torsion spring;

and a connecting part 217 connected with the torsion arm at the other side of the torsion spring is arranged on the cavity wall of the first element 2.

One end of the first element is provided with an opening, and the opening is detachably connected with the plug element 4.

The invention further discloses a detaching element for the blade replacing structure of the mower, which comprises the following components:

a hand-held portion 111;

a vertical extension 113 having one end connected to the hand-held portion 111;

the first element 2 is provided with a jack, and the vertical extending part 113 can extend into the cavity through the jack to be connected with the second element 3.

The second element 3 is provided with a shaft hole which is coaxial with the vertical extension part 113, and the vertical extension part 113 is in threaded connection with the shaft hole.

An expanded diameter part 112 is arranged at a position, close to the handheld part 111, on the vertical extending part 113, a stopping part 211 is arranged on the first element 2, and the expanded diameter part 112 is matched with the stopping part 211 to realize the stopping of the torsion process of the dismounting element.

The blade mounting process is as follows, the dismounting element 1 is inserted, rotated to a certain angle and kept to overcome the torsion of the first elastic element 6, the first element 2 is inserted to overcome the elastic force of the second elastic element 5, the second element 3 is synchronously lifted, so that the second element 3 and the plug element 4 form a blade mounting gap, the blade 7 is inserted, the mounting hole of the blade 7 is coaxial with the fixing part of the second element 3, the dismounting element 1 is released, and the blade mounting is completed. The blade removal process is similar to the installation process.

In particular, FIGS. 10-12 illustrate various components, showing various component features.

The element 1 is disassembled and the holding part 111 is used for holding in hand so as to be able to twist and lift. And the diameter expanding part 112 is matched with the stopping part 211 of the first element 2 to realize the stop of the twisting process.

The vertical extension 113 has features (such as threads, etc.) that cooperate with the axial hole 314 of the second element 3 to enable the second element 3 to rotate and lift in unison with the dismounting element 1.

The first element 2 and the connecting part 213 are used for fixing the second elastic element 6, and the connecting part 213 is matched with the abutting part 313 of the second element 3 to lift the second element 3. Furthermore, the abutment 313 cooperates with the second elastic element 6, implementing the torsion of the second elastic element 6.

The first element opening 215 is matched with the outer wall of the plug element to fix the plug element 4, and the first element opening and the plug element can be in interference fit or can be fixedly connected in a threaded fit mode and the like.

The second element 3, the protruding part 311 cooperates with the step part 214 to limit the second element 3, and only through the twisting action, avoids the cooperation of the protruding part 311 and the step part 214, the second element 3 can be lifted upwards, thereby ensuring that the blade does not fall off due to external influence. The spring connecting groove 312 is matched with the first elastic element 5 to limit the first elastic element 5.

The plug element 4 comprises a plug body 413, the plug body 413 is of a cylindrical structure, one end of the plug body 413 is hollow and forms an outer boss 411, an inner boss 412 is arranged in the outer boss, the outer boss 411 is higher than the inner boss 412, the end portion of the inner boss 412 is located in the outer boss 411, the outer boss 411 and the inner boss 412 form a step difference to ensure that the blade is fixed firmly, a hexagonal head 414 is arranged at the other end of the plug body 413, and the hexagonal head 414 is matched with an installation tool, so that the plug element 4 is conveniently installed on the first element 1.

According to the invention, through designing the structure convenient for mounting the blade, the blade is quickly and conveniently mounted, the structure is stable, the mounting is convenient, the blade is ensured not to fall off due to external working conditions, and the safety is high.