CN111819988A - Mowing knife assembly and self-moving mowing robot with same - Google Patents

Mowing knife assembly and self-moving mowing robot with same Download PDF

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Publication number
CN111819988A
CN111819988A CN201910323597.6A CN201910323597A CN111819988A CN 111819988 A CN111819988 A CN 111819988A CN 201910323597 A CN201910323597 A CN 201910323597A CN 111819988 A CN111819988 A CN 111819988A
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CN
China
Prior art keywords
mowing
base
blade
cutter head
knife assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910323597.6A
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Chinese (zh)
Inventor
王强
李孟钦
王利鹏
郑卓斌
王立磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Keyu Robot Co Ltd
Guangzhou Coayu Robot Co Ltd
Original Assignee
Guangzhou Keyu Robot Co Ltd
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Publication date
Application filed by Guangzhou Keyu Robot Co Ltd filed Critical Guangzhou Keyu Robot Co Ltd
Priority to CN201910323597.6A priority Critical patent/CN111819988A/en
Publication of CN111819988A publication Critical patent/CN111819988A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/64—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82—Other details
    • A01D34/828—Safety devices

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

The invention provides a cutter component for mowing and a self-moving mowing robot with the cutter component, wherein the cutter component for mowing comprises a base and a cutter head which is arranged on the base and can rotate relative to the base, a blade which can be adsorbed by magnetic is arranged on the cutter head, a shield which is arranged around the cutter head is arranged on the base, a gap is formed between the shield and the cutter head, and one side of the shield is provided with an opening; and the magnetic adsorption part is fixed on the protective cover and/or the cutter head. The invention prevents the fragments of the blade from sputtering through the shield, and utilizes the magnetic adsorption part to adsorb the fragments of the blade, and meanwhile, the invention can also collect the metal fragments in the covered working area.

Description

Mowing knife assembly and self-moving mowing robot with same
Technical Field
The invention relates to the technical field of mowing robots, in particular to a mowing knife assembly capable of collecting blade fragments and metal fragments and a self-moving mowing robot with the mowing knife assembly.
Background
The existing lawn mower generally adopts a working mode that a motor rotates at a high speed to drive a cutter disc to rotate at a high speed, and a blade rotates at the edge of the cutter disc at a high speed to cut grass. In order to improve the cutting effect, the blades fixed on the cutter head are usually made of metal materials, when the blades moving at high speed touch hard objects (stones, metals and the like), the blades can crack and break, and if the blade fragments cannot be collected in time, the fragments are very easy to cause danger to people.
Accordingly, there is a need for a safe mower blade assembly that prevents and collects chipped and flied blades, ensuring safety in use.
Disclosure of Invention
The invention aims to provide a mowing knife assembly and a self-moving mowing robot with the mowing knife assembly, which can solve the problems in the prior mowing robot technology.
The cutter assembly comprises a base, a cutter disc, a protective cover and a magnetic adsorption part, wherein the cutter disc is rotatably arranged on the base, a blade capable of being adsorbed by the magnetic is arranged on the cutter disc, the protective cover is arranged around the cutter disc and fixed on the base, a gap is formed between the protective cover and the cutter disc, and an opening is formed in one side of the protective cover; the magnetic adsorption part is fixed on the protective cover or the cutter head.
Preferably, the magnetic attraction portion includes a permanent magnet or an electromagnet.
Preferably, the cutter head is provided with a blade.
Preferably, the cutter head is provided with a first positioning column, or
The first positioning hole is arranged on the cutter disc; the blade is provided with a second positioning hole matched with the first positioning column, or
And the second positioning column is matched with the first positioning hole.
Preferably, the cutter head is further provided with a mounting hole close to the first positioning column, and an elastic limiting piece is arranged in the mounting hole and abuts against the blade.
The invention also provides a self-moving mowing robot using the mowing tool assembly, which comprises a body, wherein the body is provided with a driving wheel, and the body is provided with the mowing tool assembly, wherein the mowing tool assembly comprises a base, a cutter head which is arranged on the base and can rotate relative to the base, and a shield which is arranged around the cutter head and fixed on the base, a gap is formed between the shield and the cutter head, and one side of the shield is provided with an opening; and the magnetic adsorption part is fixed on the protective cover and/or the cutter head.
Preferably, the opening direction of the guard is set along a mowing direction of the self-moving mowing robot.
In the embodiment of the invention, the following beneficial effects are achieved: the shield prevents the fragments of the blade from sputtering, and the magnetic adsorption part is used for adsorbing the fragments of the blade, and meanwhile, the metal fragments in the covered working area can be collected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic perspective view of a self-propelled mowing robot according to the present invention;
FIG. 2 is a schematic bottom view of FIG. 1;
FIG. 3 is a schematic view of the grass cutting blade assembly of the present invention;
FIG. 4 is a front view of the cutter head structure of the present invention;
FIG. 5 is a schematic view showing a state in which the cutter head is rotated and the blade fragments are centrifugally separated;
FIG. 6 is a schematic view showing the state of the blade fragments being adsorbed during the rotation of the cutter head according to the present invention;
FIG. 7 is a rear view of the cutter head construction of FIG. 4;
fig. 8 is a schematic view of the mounting structure of the cutter in fig. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
As shown in fig. 1 to 3, a self-moving mowing robot is exemplified, which includes a robot body 10 that is self-movable according to a trigger event by a program, as shown in fig. 2, a mowing knife assembly 100 is installed at a bottom of the robot body 10, and plants in an area where lawn or weeds need to be trimmed are cut by the mowing knife assembly during movement of the self-moving robot.
Specifically, as shown in fig. 3, the mowing knife assembly 100 comprises a base 1000 and a cutterhead 1010, wherein the base 1000 is fixedly mounted on the bottom of the self-moving mowing robot. The impeller 1010 is rotatably mounted on the base 1000 to be rotated by the driving motor, and the blades 1040 mounted on the impeller 1010 cut the objects entering the cutting area during the rotation.
Referring to fig. 3, a plurality of shields 1020 are disposed on the base 1000 around the circumference of the cutter disc 1010 to shield the cutter disc 1010 in multiple directions, and gaps are also present between the shields 1020 and the edges of the cutting zones of the cutter disc 1010 and the blades 1040 to prevent the cutter disc 1010 from being locked by the cut objects, and of course, the shields 1020 shield the cut objects in the cutting zones and gradually release the cutting zones to prevent a large amount of cut objects from being thrown away by centrifugal force due to the rotation of the cutter disc 1010 or the blades 1040. To facilitate cutting by the knife assembly in the direction of travel, the shroud 1020 is notched in the direction of cutting (the direction of travel of the self-propelled mowing robot) to facilitate entry of vegetation (objects being cut) into the cutting area of the knife assembly 100.
Specifically, the blade 1040 is made of a magnetically attractable material, including iron. When the blades 1040 break, or other magnetically-attracted metal debris encountered during operation of the self-propelled mowing robot, enter the cutting zone, the debris is carried along by the cutterhead 1010 during operation of the cutterhead 1010 until the debris exits the cutting zone. As shown in fig. 3 and 4, the cutter head 1010 is provided with a plurality of magnets as the magnetic adsorption portions 1030, wherein the magnets are permanent magnets such as magnets, or electromagnets, and the magnets are fixed to the cutter head 1010 by means of embedding, locking, or the like, and when metal fragments are encountered, the fragments can be adsorbed to the magnetic adsorption portions 1030 by the adsorption of the magnets. Of course, the magnetic attachment 1030 may also be provided on the shroud 1020, and since the shroud 1020 is stationary, attaching the debris to the shroud 1020 may also prevent the debris from moving multiple times again through the centrifugal force of the impeller 1010.
Specifically, the person skilled in the art can calculate the attraction force F of the magnet and the centrifugal force F to which the blade piece is subjected by the following formularWherein the attractive force F is greater than the centrifugal force F in the magnetrThe debris can be safely attracted by the magnet:
setting:
Figure BDA0002035461340000031
Figure BDA0002035461340000041
therefore, the following steps are carried out:
centrifugal force: fr＝mω2r＝0.3*10-3*(250rad/s)2*60*10-3m≈1.1N
Fragment weight: gKnife with cutting edge＝mg＝0.3*10-3*10N/Kg＝0.003N
In the above embodiment, when the magnet attraction force F is 2.5N, it is understood that the magnet attraction force F is larger than the centrifugal force F generated when the chips are attractedr. Therefore, when the attraction force of the magnet to the adsorbable fragments is greater than the centrifugal force at the moment when the blade fragments fly out, the magnet can safely overcome the problem that the fragments are adsorbed by the centrifugal force generated when the fragments rotate along with the cutter head 1010.
As shown in fig. 5, when the impeller 1010 rotates in the direction of the arrow, fragments 10400 are generated when the blades 1040 are broken, the fragments 10400 will gradually spread outward in the direction of the arrow with the centrifugal force until they meet the shield 1020, and the fragments 10400 will be absorbed by the magnetic absorption portion on the shield 1020 due to the weakened potential energy, and of course, part of the fragments 10400 will be absorbed by the magnetic absorption portion 1030 on the impeller 1010. As shown in fig. 6, the fragments 10400 are adsorbed on the magnetic adsorption part 1030 and continue to move with the cutter disc 1010, but since the attraction force of the magnetic adsorption part 1030 to the fragments 10400 is greater than the centrifugal force generated relative to the fragments 10400 when the cutter disc 1010 rotates, the fragments 10400 can be safely adsorbed until the rotation of the cutter disc 1010 is stopped, and the fragments are manually cleaned.
As shown in fig. 4, a positioning column 1011 is protruded from the cutter head 1010, and a positioning hole (not shown) matched with the positioning column 1011 is formed at one end of the blade 1040, so that the blade 1040 is fixed to the cutter head 1010 by riveting, welding, or screwing. It can be appreciated that the positions of the positioning posts 1011 and the positioning holes can be interchanged.
As shown in fig. 4, a limit protrusion 1012 is provided on the cutter disk 1010, and one side of the blade 1040 abuts against the limit protrusion 1012 to prevent the blade 1040 from deflecting due to a large resistance during cutting.
As shown in fig. 4, a mounting hole (not shown) is formed near the positioning column 1011, a torsion spring 1013 is provided in the mounting hole to abut against one side of the blade 1040, and the torsion spring 1013 abuts against an opposite side of the blade 1040 relative to the stopper protrusion 1012 to restrain the left and right directions of the blade 1040, and after the blade 1040 is deflected, the torsion spring 1013 provides a restoring force to the blade 1040, so that the blade 1040 can be restored to the original position after the deflection. Of course, the torsion spring 1013 can also provide a certain buffer area when the blade 1040 deflects, so as to avoid the blade 1040 from being hard knocked by the colliding object.
As shown in fig. 7 and 8, a mounting column 1015 is disposed at the bottom of the cutter head 1010, the torsion spring 1013 is sleeved on the mounting column 1015, one end of the torsion spring 1013 passes through the mounting hole to abut against the side surface of the blade 1040, and the other end of the torsion spring 1013 abuts against a stop protrusion 1014 on the same side as the mounting column 1015.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims (6)

1. A knife tackle spare (100) for mowing, includes base (1000) and installs on base (1000) and can be for base (1000) pivoted blade disc (1010), is equipped with on blade disc (1010) can be by magnetic adsorption's blade (1040), its characterized in that still includes:
the protective cover (1020) is arranged around the cutter disc (1010) and fixed on the base (1000), a gap exists between the protective cover (1020) and the cutter disc (1010), and one side of the protective cover (1020) is provided with an opening;
and a magnetic adsorption part (1030) fixed to the shroud (1020) or the cutter head (1010).
2. The mowing knife assembly (100) according to claim 1, wherein the magnetic attraction (1030) comprises a permanent magnet or an electromagnet.
3. The mowing knife assembly (100) according to claim 1, wherein the cutterhead (1010) is provided with a first positioning column (1011), or
A first positioning hole arranged on the cutter disc (1010); the blade (1040) is provided with a second positioning hole matched with the first positioning column (1011), or
And the second positioning column is matched with the first positioning hole.
4. The mowing knife assembly (100) according to claim 3, wherein the cutter head (1010) is further provided with a mounting hole close to the first positioning column (1011), and an elastic limiting piece (1013) arranged in the mounting hole abuts against the blade (1040).
5. A self-moving mowing robot comprising a body (10) provided with driving wheels, wherein the body (10) is provided with a mowing knife assembly (100) according to any one of claims 1 to 4, wherein the mowing knife assembly (100) comprises a base (1000) and a cutterhead (1010) which is mounted on the base (1000) and can rotate relative to the base (1000), and further comprises a shield (1020) which is arranged around the cutterhead (1010) and fixed on the base (1000), a gap exists between the shield (1020) and the cutterhead (1010), and one side of the shield (1020) is provided with an opening; a magnetic attachment (1030) secured to the shroud and/or the cutter head (1010).
6. The self-moving lawn mowing robot according to claim 5, wherein an opening direction of the hood (1020) is arranged along a mowing direction of the self-moving lawn mowing robot.
CN201910323597.6A 2019-04-22 2019-04-22 Mowing knife assembly and self-moving mowing robot with same Pending CN111819988A (en)

Priority Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113172667A (en) * 2021-04-30 2021-07-27 深圳素士科技股份有限公司 Electric shaver, shaver head, cutting unit, blade and manufacturing method thereof
CN113478525A (en) * 2021-06-09 2021-10-08 深圳素士科技股份有限公司 Shaving unit, shaver unit, shaving head and shaver
CN115088462A (en) * 2022-06-24 2022-09-23 锐驰智慧科技(深圳)有限公司 Grass cutter
WO2023159884A1 (en) * 2022-02-24 2023-08-31 万维研无线动力（香港）有限公司 Blade mounting structure and lawn mower

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113172667A (en) * 2021-04-30 2021-07-27 深圳素士科技股份有限公司 Electric shaver, shaver head, cutting unit, blade and manufacturing method thereof
CN113478525A (en) * 2021-06-09 2021-10-08 深圳素士科技股份有限公司 Shaving unit, shaver unit, shaving head and shaver
WO2023159884A1 (en) * 2022-02-24 2023-08-31 万维研无线动力（香港）有限公司 Blade mounting structure and lawn mower
CN115088462A (en) * 2022-06-24 2022-09-23 锐驰智慧科技(深圳)有限公司 Grass cutter
CN115088462B (en) * 2022-06-24 2023-08-15 锐驰智慧科技(安吉)有限公司 Mower
WO2023245875A1 (en) * 2022-06-24 2023-12-28 锐驰智慧科技(深圳)有限公司 Mower

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