WO2024000741A1 - Ensemble disque de coupe et tondeuse à gazon le comprenant - Google Patents

Ensemble disque de coupe et tondeuse à gazon le comprenant Download PDF

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Publication number
WO2024000741A1
WO2024000741A1 PCT/CN2022/111419 CN2022111419W WO2024000741A1 WO 2024000741 A1 WO2024000741 A1 WO 2024000741A1 CN 2022111419 W CN2022111419 W CN 2022111419W WO 2024000741 A1 WO2024000741 A1 WO 2024000741A1
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WO
WIPO (PCT)
Prior art keywords
blade
cutterhead
circular
assembly
base
Prior art date
Application number
PCT/CN2022/111419
Other languages
English (en)
Chinese (zh)
Inventor
林永明
Original Assignee
万维研无线动力（香港）有限公司
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Filing date
Publication date
Application filed by 万维研无线动力（香港）有限公司 filed Critical 万维研无线动力（香港）有限公司
Publication of WO2024000741A1 publication Critical patent/WO2024000741A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • 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
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • A01D75/185—Avoiding collisions with obstacles
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • A01D75/187—Removing foreign objects

Definitions

  • the present invention relates to the technical field of lawn mowing equipment, and in particular, to a cutter head assembly and a lawn mower having the cutter head assembly.
  • a lawnmower also known as a weeder, lawnmower, or grass trimmer, is an automated garden tool used to mow lawns, maintain lawns, and vegetation. It can mow and maintain lawns in home courtyards, public green spaces, and other places.
  • a lawn mower is generally composed of a cutterhead assembly, a blade, an engine, a moving device, a control device and other components. The cutterhead assembly is fixed on the bottom of the moving device, and the blade is fixed on the bottom of the cutterhead assembly.
  • Most lawn mowers currently on the market use a screw to fix the blade to the cutterhead assembly, and then drive the engine on the cutterhead assembly to rotate the cutterhead assembly, thereby driving the blades on the cutterhead assembly to rotate at high speed. To achieve the purpose of mowing grass. This simple screw fixation method makes the blade easily clogged and unable to rotate during actual use.
  • the purpose of the present invention is to solve the shortcoming of the existing lawn mower that the blade and the cutterhead assembly are fixed with simple screws, causing the blade to be easily blocked by impurities and unable to rotate normally, thereby causing a negative impact on the lawn mower, and provide A cutter head assembly.
  • a cutterhead assembly which includes a circular cutterhead, a plurality of blade assemblies evenly distributed on the circular cutterhead along the circumference, and a cutterhead assembly arranged on the circular cutterhead.
  • a sealing component between the disk and the blade assembly the blade assembly includes a rotating shaft fixed on the bottom of the circular cutterhead, a knife seat sleeved on the rotating shaft, a blade fixed on the bottom of the knife seat;
  • the sealing assembly includes a first sealing member disposed between the circular cutterhead and the cutter seat; and a first sealing member disposed between the blade and the cutter seat.
  • the bottom surface of the circular cutterhead is provided with several installation positions for fixing the blade assembly.
  • the installation positions are provided in one-to-one correspondence with the blade assembly.
  • the installation positions include: A circular mounting groove is provided on the bottom surface of the circular cutterhead surrounding the cutter seat, and a central hole is provided in the circular mounting groove to fix the rotating shaft.
  • the tool holder includes a base, a through hole provided at the center of the base for the rotating shaft to pass through, and a first hole provided on the top of the base to fix the elastic element.
  • a mounting slot and a second mounting slot provided at the bottom of the base for fixing the blade.
  • the first sealing member is an elastic sealing ring disposed between the base and the circular mounting groove, and the base is embedded in one end of the circular mounting groove.
  • An annular groove for fixing the elastic sealing ring is provided on the side.
  • the blade is provided with a rotation hole for the rotation shaft to pass through
  • the second sealing member includes a seal that is passed through the rotation hole of the blade and locked to the bottom of the rotation shaft.
  • a fastener and an annular elastic gasket disposed between the fastener and the blade.
  • the elastic element includes an elastic body and a first fixed end and a second fixed end located on both sides of the elastic body.
  • the elastic body is sleeved in the first installation groove of the tool holder. .
  • the mounting position of the circular cutter head further includes a first mounting hole disposed in the circular mounting groove for fixing the elastic element, and the first mounting groove of the cutter holder is further provided with a first mounting hole.
  • There is a second mounting hole for fixing the elastic element the first fixed end is inserted into the first mounting hole of the mounting position, and the second fixed end is inserted into the second mounting hole of the tool holder.
  • the tool holder further includes a positioning protrusion disposed on the top of the base, and an arc-shaped sliding groove for the positioning protrusion to be inserted is provided in the circular installation groove of the mounting position.
  • the groove is provided with limiting portions at both ends of the arc-shaped sliding groove that are in contact with the side surfaces of the positioning protrusion.
  • the blade assembly further includes a sleeve disposed in the cutter base and sleeved on the rotating shaft, and a through hole in the base includes a sleeve that communicates with the top surface of the base.
  • the first stepped hole and the second stepped hole communicated with the bottom surface of the base, and the shaft sleeve is arranged in the first stepped hole.
  • the second installation groove is a U-shaped groove provided on the bottom surface of the base, one end of the blade is embedded in the U-shaped groove, and the other end is formed by the U-shaped groove. Stick out of the opening.
  • the blade can extend out of the circular cutterhead by a length of 5 mm to 40 mm.
  • the beneficial effect of the cutterhead assembly is that it includes a circular cutterhead and a blade assembly, in which the cutter seat and the blade in the blade assembly are fixedly connected as a whole, and the circular cutterhead and the cutter seat are transmission connected through elastic elements. , so that when the circular cutterhead rotates, it drives the cutter holder and the blade to rotate synchronously; when the blade encounters an obstacle, the blade and the cutter holder can also rotate in reverse around the axis of rotation to avoid the obstacle; at the same time, the circular cutterhead and blade assembly There is a sealing component between them.
  • the sealing component reduces the risk of being blocked by debris between the circular cutterhead and the blade assembly, thereby extending the service life of the entire cutterhead assembly and reducing maintenance during use. and frequency of blade replacement.
  • the invention also provides a lawn mower, including the above-mentioned cutter head assembly and an engine driving the cutter head assembly.
  • the beneficial effect of the lawn mower provided by the present invention is that the use of the above-mentioned cutterhead assembly can reduce the risk of being blocked by debris between the blade assembly and the circular cutterhead, thereby prolonging the life of the entire cutterhead assembly.
  • the service life can also reduce the frequency of regular maintenance of the lawn mower during use.
  • Figure 1 is a schematic three-dimensional exploded structural view of a cutterhead assembly provided by the present invention
  • Figure 2 is a schematic three-dimensional structural diagram of a cutterhead assembly provided by the present invention when the blade assembly is fully extended;
  • Figure 3 is a schematic three-dimensional structural diagram of the blade assembly in a cutterhead assembly provided by the present invention when it is fully folded;
  • Figure 4 is a full cross-sectional view of a single blade assembly in a cutterhead assembly provided by the present invention when it is connected to a circular cutterhead;
  • Figure 5 is a schematic three-dimensional structural diagram of an elastic element in a cutterhead assembly provided by the present invention.
  • Figure 6 is a schematic three-dimensional structural diagram of a circular cutterhead in a cutterhead assembly provided by the present invention.
  • Figure 7 is a partial enlarged view of position A in Figure 6;
  • Figure 8 is a schematic three-dimensional structural diagram of a cutter seat in a cutterhead assembly provided by the present invention.
  • Figure 9 is a full cross-sectional view of a cutter seat in a cutter head assembly provided by the present invention.
  • Figure 10 is a schematic three-dimensional structural diagram of a blade in a cutterhead assembly provided by the present invention.
  • Figure 11 is a schematic three-dimensional structural diagram of a lawn mower provided by the present invention.
  • 20-blade assembly 21-rotating shaft, 211-vertical connection, 212-fixing piece, 22-knife holder, 221-base, 2211-annular groove, 2212-positioning protrusion, 222-through hole, 2221- First step hole, 2222-second step hole, 223-first installation slot, 2231-second installation hole, 224-second installation slot, 2241-parallel side, 2242-arc side, 225-fixing hole , 226-positioning post, 23-blade, 231-rotation hole, 232-connection hole, 233-positioning hole, 24-elastic element, 241-elastic body, 242-first fixed end, 243-second fixed end, 25 -Shaft sleeve, 26-locking piece;
  • a cutter head assembly 100 provided by the present invention is shown.
  • the cutter head assembly 100 is suitable for use in a series of automated lawn maintenance equipment such as lawn mowers 200, weed eaters, lawn mowers, etc., and can provide effective cutting parts for the maintenance equipment to achieve the purpose of mowing the lawn.
  • a cutterhead assembly 100 provided by the present invention includes a circular cutterhead 10 and a plurality of blade assemblies 20 evenly distributed on the circular cutterhead 10 along the circumference.
  • the center of the circular cutterhead 10 is provided with a mounting hole fixedly connected to a driving component, and the high-speed rotation of the circular cutterhead 10 is achieved through the driving component.
  • the blade assembly 20 When the blade assembly 20 leaves the obstacle, the blade assembly 20 will rotate along the rotation direction of the circular cutterhead 10 again due to the elastic drive of the elastic element 24 inside the blade assembly 20, and the blade 23 will extend out of the circular cutterhead. 10's exterior. In this way, through the relative rotation between the blade assembly 20 and the circular cutterhead 10, the service life of the blade assembly 20 and the safety of the cutterhead assembly 100 can be greatly improved, and the damage of the blade assembly 20 when exposed to hard objects can be avoided as much as possible. Or dulling issues.
  • the cutterhead assembly 100 provided by the present invention also includes a sealing component 30 disposed between the circular cutterhead 10 and the blade assembly 20 .
  • the sealing component 30 is disposed on the circular cutterhead 10
  • There is a gap between the blade assembly 20 and the blade assembly 20 in the vertical direction, that is, the gap where the sealing assembly 30 is distributed is in a direction perpendicular to the rotation direction of the cutterhead.
  • FIG. 4 it is a full cross-sectional view of the blade assembly 20 and the circular cutterhead 10 in the cutterhead assembly 100 provided by the present invention.
  • the blade assembly 20 provided by the present invention includes a rotating shaft 21 fixed on the bottom of the circular cutterhead 10, a cutter seat 22 sleeved on the rotating shaft 21, a blade 23 fixed on the bottom of the cutter seat 22, and the circular cutterhead 10 and the cutter.
  • the elastic element 24 is drivingly connected to the seat 22 .
  • the rotating shaft 21 in the blade assembly 20 is fixedly connected to the circular cutterhead 10 .
  • the vertical connecting portion 211 at the top of the rotating shaft 21 passes through the circular blade 10 and is fixedly connected to the fixing member 212.
  • the vertical connecting portion 211 is provided with external threads, and the fixing member 212 is a bolt.
  • the top of the rotating shaft 21 is directly locked on the circular cutterhead 10 through bolts, so that the rotating shaft 21 and the circular cutterhead 10 are fixedly connected, and the rotating shaft 21 and the circular cutterhead 10 are integrated.
  • the knife holder 22 is sleeved on the rotating shaft 21 , and the blade 23 is fixed at the bottom of the knife holder 22 so that the knife holder 22 and the blade 23 are integrated, and the knife holder 22 drives the blade 23 to rotate horizontally relative to the rotating shaft 21 .
  • the blade 23 is fixedly connected to the blade holder 22 and can rotate horizontally relative to the rotating shaft 21 as the blade holder 22 rotates.
  • the elastic element 24 disposed between the circular cutterhead 10 and the cutter seat 22 provides greater support force for the cutter seat 22 and transmits the support force to the blade 23 through the cutter seat 22, thereby lifting the blade 23 cutting force on.
  • the arrangement of the elastic element 24 allows the cutter seat 22 to not only receive the rotational acceleration force generated by the rotation of the circular cutterhead 10 during the high-speed rotation of the circular cutterhead 10 , but also simultaneously receive the elastic force provided by the elastic element 24 , two forces act on the knife seat 22 at the same time, and are transmitted to the blade 23 fixedly connected with the knife seat 22, so that the cutting force of the blade 23 is greater and the cutting effect is better.
  • the obstacle When the blade assembly 20 rotates at high speed with the circular cutterhead 10 and the blade 23 contacts a hard obstacle, the obstacle will form resistance to the blade 23. Only when this resistance is greater than the centrifugal force and the elastic element of the circular cutterhead 10 24 When the sum of these two forces is combined, the blade 23 will drive the blade holder 22 to rotate around the rotating axis 21 in the opposite direction of the rotation of the circular cutterhead 10 along with this resistance, thereby achieving the avoidance of hard obstacles by the blade assembly 20. At this time, the elastic element 24 will not hinder the synchronous reverse rotation of the tool holder 22 and the blade 23 .
  • the blade assembly 20 After the blade assembly 20 leaves the obstacle, the blade assembly 20 will rotate again along the rotating shaft 21 along the rotation direction of the circular cutterhead 10 with the restoring force of the elastic element 24. At this time, the blade assembly 20 The blade 23 will again protrude from the bottom of the circular cutterhead 10 .
  • the blade assembly 20 is provided with an elastic element 24 that is driven and connected between the circular cutterhead 10 and the cutter seat 22.
  • the elastic element 24 supports the cutter seat 22 and the blade 23. It acts as an elastic support, so the cutting force of the blade 23 can still be maintained while reducing the rotation speed of the circular cutterhead 10 . Reducing the rotation speed of the circular cutterhead 10 can also achieve the technical effects of reducing the noise of the lawn mower 100 and saving power.
  • the blade 23 provided by the invention can extend the length L1 of the circular cutterhead 10 , which is significantly longer than the length L1 of the blade 23 of the traditional lawn mower 200 .
  • the distance between the end of the blade 23 and the outer circumferential surface of the circular cutterhead 10 is L1, that is, the blade 23 can extend out of the circular cutter.
  • the length L1 of the blade 23 that can extend out of the circular cutter head 23 is 5mm-40mm.
  • the length L1 by which the blade 23 can extend out of the circular cutterhead 23 is determined by the selected length of the blade 23 . That is, the blade 23 in the blade assembly 20 provided by the present invention can be the blade 23 equipped with the circular cutterhead 10 in the traditional lawn mower 200.
  • the traditional blade 23 generally has an overall length of 25 mm, and the blade 23 can be extended.
  • the length L1 of the circular cutter head 10 is controlled within 10 mm.
  • the blade 23 in the blade assembly 20 provided by the present invention can either use a traditional blade with a length of 25 mm, so that the length L1 of the outer circumferential surface of the circular cutterhead 10 extended by the blade 23 is between 5 mm and 10 mm, or a traditional blade with a length of 25 mm can be selected.
  • the length of the blade 23 provided in the blade assembly 20 is 45 mm, and the length L1 of the blade 23 that can extend out of the circular cutterhead 10 is about 30 mm.
  • the cutterhead assembly 100 in the present invention uses a blade 23 with a larger length, so that the length of the blade 23 protruding from the outer surface of the circular cutterhead 10 can be between 10 mm and 40 mm. Choosing a longer blade 23 can not only increase the cutting range of the cutterhead assembly 100 during cutting, but also greatly improve the cutting ability of the blade 23, so that the cutting that originally required three rotations of the circular cutterhead 10 can now be completed.
  • the selectable length of the blade 23 in the blade assembly 10 provided by the present invention is between 20 mm and 55 mm, that is, the length of the blade 23 can be selected to be 25 mm, 30 mm, 35 mm, 40 mm or 45 mm.
  • the sealing component 30 in the cutterhead assembly 100 provided by the present invention includes a first seal 31 disposed between the circular cutterhead 10 and the cutter seat 22 and a first seal 31 disposed between the blade 23 and the rotating shaft 21 the second seal 32.
  • the blade assembly 20 and the circular cutterhead 10 in the cutterhead assembly 100 provided by the present invention are connected, they can rotate relative to each other. Therefore, when the two are installed, at the connection parallel to the direction of rotation, through their own installation The structure is completely closed, thereby avoiding clogging due to installation gaps in the rotation direction.
  • the blade assembly 20 and the circular blade 10 only have two installation gaps in the vertical direction that are perpendicular to each other in the rotation direction.
  • the sealing assembly 30 is configured to seal the installation gap formed by these two places, so as to avoid clogging between the blade assembly 20 and the circular blade 10 and preventing them from rotating.
  • the first seal 31 is located at the installation gap between the circular cutter head 10 and the knife seat 22, and the second seal 32 is provided at the installation gap between the blade 23 and the rotating shaft 21.
  • the first seal 31 and The installation gaps where the second seal 32 is located are all vertically arranged, and the installation directions of the two installation gaps are mutually perpendicular to the rotation direction of the circular cutterhead 10 .
  • FIG. 6 it is a schematic three-dimensional structural diagram of the circular cutterhead 10 in the cutterhead assembly 100 provided by the present invention.
  • the bottom surface of the circular cutter head 10 is provided with several mounting positions 11 for fixing the blade assembly 20 .
  • the mounting positions 11 correspond to the blade assembly 20 one by one.
  • six blade assemblies 20 are provided in the cutterhead assembly 100.
  • six mounting positions 11 are provided on the bottom surface of the circular cutterhead 10, and each mounting position 11 is used for one blade assembly. 20's installation is fixed.
  • FIG. 7 a partial enlarged view of one of the mounting positions 11 on the circular cutterhead 100 is shown.
  • the mounting position 11 includes a circular mounting groove 111 provided on the bottom surface of the circular cutterhead 10 surrounding the cutter seat 22 and a central hole 112 provided in the circular mounting groove 111 for fixing the rotating shaft 21 .
  • the circular mounting groove 111 is provided on the bottom surface of the circular cutter head 10 and extends from the bottom surface toward the top surface.
  • the circular mounting groove 111 is used to nest the knife seat 22 of the blade assembly 20 so that the knife seat 22 One end can be embedded in it and rotate around the center of the circular mounting groove 111 .
  • the central hole 112 inside the circular mounting groove 111 is used to fix the rotating shaft in the blade assembly 20 . In this embodiment, as shown in FIG.
  • the rotating shaft 21 is connected to the circular cutterhead 10 .
  • the central hole 112 at the mounting position 11 of the circular cutterhead 10 forms an annular mounting column inside the circular mounting groove 111, and the annular mounting column is sleeved on the outside of the rotating shaft 21.
  • the rotating shaft 21 is provided with two threads on the outer circumferential surface of the rotating shaft 21.
  • the threads increase the friction with the circular cutterhead 10, thereby increasing the friction between the rotating shaft 21 and the circular cutterhead 10. Ensure the relative fixation between the rotating shaft 21 and the circular cutterhead 10.
  • the central hole 112 on the circular cutterhead 10 and the vertical connecting portion 211 of the rotating shaft 21 abut each other, and the central hole 112 is used to limit the upward movement of the rotating shaft 21 in the vertical direction.
  • the tool base 22 provided by the present invention includes a base 221, a through hole 222 provided at the center of the base 221 for the rotation shaft 21 to pass through, a first mounting groove 223 provided on the top of the base 221 for fixing the elastic element 24, and a
  • the second mounting groove 224 of the blade 23 is fixed at the bottom of the base 221 .
  • the base 221 of the tool holder 22 is a circular base, and the top of the base 211 is embedded in the circular mounting groove 111 of the circular cutterhead 10, and is between the top of the base 211 and the circular cutterhead 10.
  • An elastic element 24 is provided and fixed through the first mounting groove 223 on the base 211 .
  • the bottom of the base 211 is used to fix the blade 23 so that the blade 23 can rotate synchronously with the knife seat 22.
  • the first seal 31 in the sealing assembly 30 is an elastic sealing ring disposed between the base 221 and the circular mounting groove 111 .
  • the base 221 is embedded in the circular mounting groove 111 .
  • An annular groove 2211 for fixing an elastic sealing ring is provided on the outer surface of one end of the groove 111.
  • the inner ring of the elastic sealing ring is embedded in the annular groove 2211 of the base 221, and the outer ring is connected with the annular groove 2211 of the circular cutterhead 10.
  • the circular mounting groove 111 is in contact.
  • lubricating oil will be filled in the gap between the circular mounting groove 111 and the base 221, and the lubricating oil will be filled up to the elastic sealing ring, so that there is a gap between the knife seat 22 and the circular cutterhead 10.
  • a better sealing effect can be achieved at the installation gap between them, that is, the lubricity when the knife seat 22 rotates relative to the circular cutterhead 10 can be improved, and the sealing effect at the gap can also be achieved to prevent the intrusion of dust, impurities, and broken grass. This gap blocks the rotation of the tool holder 22 .
  • FIG. 10 it is a schematic three-dimensional structural diagram of the blade 23 in the blade assembly 20 of the present invention.
  • the blade 23 is provided with a rotation hole 231 for the rotation shaft 21 to pass through.
  • the blade 23 is fixed to the bottom of the blade holder 22 , and the rotation hole 231 on the blade 23 is sleeved on the bottom of the rotating shaft 21 , so that the blade 23 can rotate horizontally relative to the rotating shaft 21 along with the blade holder 22 .
  • the second seal 32 in the seal assembly 30 provided by the present invention is disposed at the installation gap between the blade 23 and the rotating shaft 21 . As shown in FIG.
  • the second seal 32 includes a fastener 321 that penetrates the rotation hole 231 of the blade 23 and is locked to the bottom of the rotating shaft 21 and an annular elastic ring that is disposed between the fastener 321 and the blade 23 . Gasket 322.
  • the fastener 321 passes through the rotation hole 231 of the blade 23 from bottom to top and is fixed to the bottom of the rotating shaft 21 .
  • the fastener 321 needs to use a screw with a flat receiving surface on the head, thereby ensuring that the receiving surface can directly fit the annular elastic washer 322, and the annular elastic washer 322 is fixedly connected to the rotating shaft 21.
  • the gasket 322 is pressed between the rotating shaft 21 and the head of the fastener 321, so that the gap between the rotating hole 231 of the blade 23 and the rotating shaft 21 is completely closed by the annular elastic gasket 322.
  • the fastener 321 selected in the second seal 32 of the seal assembly 30 in the present invention is preferably a flat-top screw, or a C-head, B-head, P-head, T-head, R-head, H-head or PW-head
  • the bearing surface is a flat screw.
  • the elastic sealing ring of the first sealing member 31 and the annular elastic gasket 322 of the second sealing member 32 in the sealing assembly 30 provided by the present invention can be made of dust-proof sealing elastic materials, such as rubber, silicone and other materials. become.
  • FIG. 5 it is a schematic three-dimensional structural diagram of the elastic element 24 in the blade assembly 20 provided by the present invention.
  • the elastic element 24 provided by the present invention includes an elastic body 241 and a first fixed end 242 and a second fixed end 243 located on both sides of the elastic body 241.
  • the elastic body 241 is sleeved in the first installation groove 223 of the tool holder 22.
  • the elastic element 24 may be a spring or other elastic component.
  • the elastic body 241 in the elastic element 24 provides elastic force for the cutter seat 10 when the circular cutterhead 10 rotates at high speed.
  • the first fixed end 242 and the second fixed end on both sides of the elastic body 241 243 is used to connect the tool holder 22 and the circular cutterhead 10 to realize power transmission between the circular cutterhead 10 and the tool holder 22 .
  • the mounting position 11 of the circular cutter head 10 also includes a first mounting hole 113 disposed in the circular mounting groove 111 for fixing the elastic element 24 .
  • the first mounting groove 223 is also provided with a second mounting hole 2231 for fixing the elastic element 24 .
  • the first fixed end 242 is inserted into the first mounting hole 113 of the mounting position 11
  • the second fixed end 243 is inserted into the second mounting hole 2231 of the tool holder 22 .
  • the first mounting hole 113 and the second mounting hole 2231 are both horn holes with gradually increasing diameters, and the horn holes are arranged obliquely along the rotation direction of the circular cutterhead 10.
  • This arrangement can ensure that the elastic element 24 is When the tool holder 24 rotates relative to the rotating shaft 21, it will not affect the rotation of the tool holder 24, ensuring smooth rotation of the tool holder 24.
  • the cutter holder 22 rotates reversely relative to the circular cutterhead 10
  • the first fixed end 242 inserted into the first mounting hole 113 can be tilted to abut against the inner wall of the first mounting hole 113
  • the second fixed end 242 inserted into the first mounting hole 113 can be tilted to the inner wall of the first mounting hole 113 .
  • the second fixed end 243 in the mounting hole 2231 will also be inclined to abut against the inner wall of the second mounting hole 2231 .
  • the tool seat 22 also includes a positioning protrusion 2212 provided on the top of the base 221.
  • a positioning protrusion 2212 provided on the top of the base 221.
  • An arc-shaped sliding groove 114 into which the positioning protrusion 2212 can be inserted is also provided.
  • the positioning protrusion 2212 is disposed on the top of the cutter holder 22.
  • the positioning protrusion 2212 is inserted into the arc-shaped sliding movement of the circular cutter head 10. in the groove 114 and can rotate along the direction in which the arc-shaped sliding groove 114 is arranged.
  • limiting portions 115 that abut against the side surfaces of the positioning protrusions 2212 are provided at both ends of the arc-shaped sliding groove 114 .
  • the relative rotation angle between the tool holder 22 and the circular cutterhead 10 is limited.
  • the positioning protrusion 2212 of the tool holder 22 abuts the limiting portion 115 on one side of the arc-shaped sliding groove 114.
  • the tool holder 22 drives the cutting portion of the blade 23 fixed below it to be completely Extending from the bottom of the circular cutterhead 10, as shown in Figure 2.
  • the positioning protrusion 2212 of the tool holder 22 slides along the arc-shaped sliding groove 114 and abuts against the limiting portion 115 at the other end of the arc-shaped sliding groove 114 .
  • the cutting part of the blade 23 fixed below the cutter seat 22 can be completely rotated to the bottom of the circular cutter head 10, as shown in Figure 3.
  • the positioning protrusion 2212 on the tool holder 22 and the arc-shaped sliding groove 114 on the mounting position 11 function to limit the angular range of the horizontal rotation of the tool holder 22 relative to the circular cutterhead 10 .
  • the blade assembly 20 provided by the present invention also includes a sleeve 25 disposed in the cutter seat 22 and sleeved on the rotating shaft 21.
  • the sleeve 25 is fixed in the cutter seat 22 and sleeved Located on the rotating shaft 21.
  • FIG 9 it is a full cross-sectional view of the tool holder 22 provided by the present invention.
  • the through hole 222 in the base 221 of the tool holder 22 includes a first step hole 2221 connected to the top surface of the base 221 and a second step hole 2222 connected to the bottom surface of the base 221.
  • the sleeve 25 is disposed on the first step hole 2221. Inside the step hole 2221.
  • the shaft sleeve 25 is disposed inside a side of the base 221 near the top. The shaft sleeve 25 allows the tool holder 22 to rotate relative to the rotating shaft 21 more smoothly.
  • the second mounting groove 224 provided at the bottom of the tool holder 21 provided by the present invention is a U-shaped groove provided on the bottom surface of the base 221.
  • the U-shaped groove has two opposite parallel sides 2241 and a connecting Two arc-shaped sides 2242 of parallel sides 2241.
  • the parallel sides 2241 and the arcuate sides 2242 form a structural fence surrounding the end of the blade 23 , and the structural fence can completely block the horizontal plane connecting the end of the blade 23 to the knife seat 22 .
  • one end of the blade 23 is embedded in the U-shaped groove, and the other end protrudes from the opening of the U-shaped groove.
  • the structural fence formed by the U-shaped groove can block the horizontal gap between the blade 23 and the tool seat 22 as much as possible, and only flows out an opening equal to the width of the blade 23, through which the cutting end of the blade 23 is removed from the tool seat 22 protrude from the U-shaped groove.
  • the blade 23 is fixed in the second mounting groove 224 provided at the bottom of the blade holder 22 .
  • the tool base 22 further includes at least one fixing hole 225 provided at the bottom of the base 221 for fixing the blade 23 and at least one positioning post 226 provided at the bottom of the base 221 .
  • the bottom of the tool holder 22 is provided with two fixing holes 225 .
  • the two fixing holes 225 are spaced apart along the length direction of the blade 23 .
  • the bottom of the tool holder 22 is provided with two fixing holes 225 .
  • Positioning posts 226, two positioning posts 226 are spaced apart along the width direction of the blade 23.
  • the blade 23 is provided with a connecting hole 232 into which the locking member 26 can be inserted and a positioning hole 233 into which the positioning post 226 can be inserted.
  • the end of the blade 23 is inserted into the second installation groove 224 at the bottom of the blade holder 22, and the two positioning holes 223 of the blade 23 are inserted into the positioning posts 226 at the bottom of the blade holder 22, and then the locking member 26 is The connecting hole 232 passing through the blade 23 is locked to the fixing hole 225 of the blade holder 22 .
  • the locking member 26 may be a screw, a rivet, a bolt, or other type of connection element, and the blade 23 and the tool base 22 are fixedly connected through the locking member 26 .
  • the cutterhead assembly 100 provided by the present invention includes a circular cutterhead 10 and a blade assembly 20, in which the cutter seat 22 and the blade 23 in the blade assembly 20 are fixedly connected as a whole, and the circular cutterhead 10 and the cutter seat 22 are connected by
  • the elastic element 24 is connected through transmission, so that when the circular cutterhead 10 rotates, it drives the knife holder 22 and the blade 23 to rotate synchronously; when the blade 23 encounters an obstacle, the blade 23 and the knife holder 22 can also rotate in reverse around the rotating shaft 21 to avoid it. Obstacles; at the same time, a sealing assembly 30 is provided between the circular cutterhead 10 and the blade assembly 20.
  • the sealing assembly 30 reduces the risk of the circular cutterhead 10 and the blade assembly 20 being blocked by debris and unable to rotate, thereby extending the
  • the service life of the entire cutterhead assembly 100 can also reduce the frequency of maintenance and replacement of the blades 23 during use of the cutterhead assembly 100 .
  • the present invention also provides a lawn mower 200, including the above-mentioned cutterhead assembly 100 and an engine driving the cutterhead assembly 100.
  • the center of the circular cutterhead 10 in the cutterhead assembly 100 is provided with a mounting hole fixed to the driving rod 210 of the engine, so that the circular cutterhead 10 can rotate at high speed with the engine.
  • the lawn mower 200 provided by the present invention adopts the above-mentioned cutterhead assembly 100, which can reduce the risk of being blocked by debris between the blade assembly 20 and the circular cutterhead 10, thereby extending the life of the entire cutterhead assembly 100.
  • the service life can also reduce the frequency of regular maintenance of the lawn mower 200 during use.

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

Abstract

L'invention concerne un ensemble disque de coupe comprenant un disque de coupe circulaire (10), des ensembles lame (20) et des ensembles d'isolation (30). Chaque ensemble lame (20) comprend un arbre rotatif (21), un support de dispositif de coupe (22), une lame (23) et un élément élastique (24) ; et chaque ensemble d'isolation (30) comprend un premier élément d'isolation (31) disposé entre le disque de coupe circulaire (10) et le support de dispositif de coupe (22), et un second élément d'isolation (32) disposé entre la lame (23) et l'arbre rotatif (21). L'ensemble disque de coupe fourni comprend le disque de coupe circulaire (10) et les ensembles lame (20). Le support de dispositif de coupe et la lame de chaque ensemble lame (20) sont reliés à demeure pour former un tout, et le disque de coupe circulaire (10) et les supports de dispositif de coupe sont en liaison d'entraînement au moyen des éléments élastiques (24), de telle sorte que les supports de dispositif de coupe (22) et les lames (23) soient entraînés en rotation synchrone pendant la rotation du disque de coupe circulaire (10) ; et les ensembles d'isolation (30) sont disposés entre le disque de coupe circulaire (10) et les ensembles lame (20), et le risque que le disque de coupe circulaire (10) et les ensembles lame (20) ne peuvent tourner en raison du blocage provoqué par des débris entre eux est réduit au moyen des ensembles d'isolation (30), ce qui permet de prolonger la durée de vie de la totalité de l'ensemble disque de coupe, et de réduire également la fréquence d'entretien et de remplacement des lames pendant l'utilisation de l'ensemble disque de coupe. L'invention concerne également une tondeuse à gazon.
PCT/CN2022/111419 2022-07-01 2022-08-10 Ensemble disque de coupe et tondeuse à gazon le comprenant WO2024000741A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210768265.0 2022-07-01
CN202210768265.0A CN115004952A (zh) 2022-07-01 2022-07-01 一种刀盘组件及具有该刀盘组件的割草机

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WO2024000741A1 true WO2024000741A1 (fr) 2024-01-04

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CN (1) CN115004952A (fr)
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050081499A1 (en) * 2003-10-17 2005-04-21 Capitol Stampings Corp. Spindle assembly
KR20130004916U (ko) * 2012-02-08 2013-08-19 김경태 베어링 방수캡을 구비한 예초기용 안전커버
CN103299757A (zh) * 2012-03-06 2013-09-18 江苏苏美达五金工具有限公司 旋转式割草机工作头
CN214430187U (zh) * 2020-10-21 2021-10-22 纳恩博（北京）科技有限公司 割草机
CN114391365A (zh) * 2022-02-24 2022-04-26 万维研无线动力（香港）有限公司 一种刀片安装结构及割草机
CN217509443U (zh) * 2022-07-01 2022-09-30 万维研无线动力（香港）有限公司 一种刀盘组件及具有该刀盘组件的割草机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050081499A1 (en) * 2003-10-17 2005-04-21 Capitol Stampings Corp. Spindle assembly
KR20130004916U (ko) * 2012-02-08 2013-08-19 김경태 베어링 방수캡을 구비한 예초기용 안전커버
CN103299757A (zh) * 2012-03-06 2013-09-18 江苏苏美达五金工具有限公司 旋转式割草机工作头
CN214430187U (zh) * 2020-10-21 2021-10-22 纳恩博（北京）科技有限公司 割草机
CN114391365A (zh) * 2022-02-24 2022-04-26 万维研无线动力（香港）有限公司 一种刀片安装结构及割草机
CN217509443U (zh) * 2022-07-01 2022-09-30 万维研无线动力（香港）有限公司 一种刀盘组件及具有该刀盘组件的割草机

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