CN114391365A

CN114391365A - Blade mounting structure and lawn mower

Info

Publication number: CN114391365A
Application number: CN202210177378.3A
Authority: CN
Inventors: 林永明
Original assignee: Wanweiyan Wireless Power Hong Kong Co ltd
Current assignee: Wanweiyan Wireless Power Hong Kong Co ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-04-26
Also published as: WO2023159884A1

Abstract

The invention provides a blade mounting structure, which comprises a plurality of blades and a cutter head, wherein a plurality of blade fixing seats are arranged on the cutter head along the circumferential direction of the cutter head; the spring is including being the spring body of heliciform setting and being located the first stiff end and the second stiff end of spring body both sides. The blade mounting structure provided by the invention has the beneficial effects that: the spring is used for movably connecting the cutter head with the blades, when the cutter head rotates at a high speed, the spring is elastically deformed by the centrifugal force generated by the high-speed rotation of the cutter head and generates acting force on the blades, and the acting force generated by the spring on the blades can effectively improve the cutting force of the blades, so that the effect of improving the cutting effect of the whole cutter head is achieved. The invention also provides a mower.

Description

Blade mounting structure and lawn mower

Technical Field

The invention relates to the technical field of mowing equipment, in particular to a blade mounting structure and a mower.

Background

The lawn mower is also called a weeder, a lawnmower or a grass trimmer, is an automatic garden tool for trimming lawns, maintaining lawns and plants, and can realize lawn trimming and maintenance on places such as family courtyards, public greenbelts and the like. The mower generally comprises a cutter head, a blade, an engine, a moving device, a control device and other components, wherein the cutter head is fixed at the bottom of the moving device, and the blade is fixed at the bottom of the cutter head. Most of the lawn mowers in the market adopt screws to fix blades on a cutter head, and then drive an engine on the cutter head to rotate the cutter head, so that the blades on the cutter head are driven to rotate at a high speed to achieve the aim of mowing.

The cutting force of the blades on the existing mower is completely passively dependent on the centrifugal force generated by the high-speed rotation of the cutter head, namely, the centrifugal force is larger when the cutter head rotates faster, and the cutting force generated by driving the blades is larger. In order to ensure that the mower has good cutting effect, the power of a motor for driving the cutter disc is increased to keep the cutter disc and the blades rotating at high speed, or the thickness and the weight of the blades are increased to improve the cutting strength of the blades.

Whether the cutting performance is improved by improving the power of the engine or increasing the thickness of the blade, the energy consumption of the engine and the battery is increased, the service life of the engine and the battery is shortened, and a lower-noise and quieter working environment cannot be obtained. And meanwhile, the production and processing costs of the cutter head and the cutter blades are increased. Moreover, the high-speed rotation of the cutter head increases the heat generation of the related components on the cutter head, and the related components of the cutter head need to be designed in a heat insulation manner, so that the thickness and the cost of the cutter head are increased.

Disclosure of Invention

The invention aims to overcome the defects that the energy consumption of an engine and a battery is increased, the service life is shortened and the production and processing costs of a cutter disc and a blade are increased due to the fact that the power of the engine or the thickness of the cutter disc is increased in order to ensure the cutting effect of the existing mower or obtain a lower-noise working environment of the existing mower, and provides a blade mounting structure.

The technical scheme adopted by the invention for solving the technical problems is as follows: a blade mounting structure comprises a plurality of blades and a cutter head, wherein a plurality of blade fixing seats are arranged on the cutter head along the circumferential direction of the cutter head, the blade fixing seats and the blades are arranged in a one-to-one correspondence manner, the blade mounting structure also comprises a connecting piece for fixing the blades on the blade fixing seats and a spring which is arranged in the blade fixing seats and movably connects the blades with the blade fixing seats; the spring comprises a spring body which is spirally arranged, and a first fixed end and a second fixed end which are positioned at two sides of the spring body, wherein the first fixed end of the spring is fixedly connected with the blade fixing seat, and the second fixed end of the spring is fixedly connected with the blade; the blade fixing seat is internally provided with a first mounting hole for the first fixing end to be inserted and fixed, and the blade is provided with a second mounting hole for the second fixing end to be inserted and fixed.

Further, the blade fixing seat comprises a mounting column and an annular ring, wherein the mounting column is arranged on the cutter disc and used for fixing the connecting piece, the annular ring surrounds the mounting column, and a mounting space capable of accommodating the spring is formed between the mounting column and the annular ring.

Specifically, the first mounting hole is formed in the bottom of the mounting space and penetrates through the cutter head.

Further, the first fixed end of spring by the tip of spring body is bent, and is extended along the one side of keeping away from the spring body, first fixed end with the axis of spring body is parallel to each other.

Further, the blade have with the fixed installation section of blade disc with be located the cutting section in the blade disc outside, be provided with on the installation section of blade and supply the connecting hole that the connecting piece passed, the second mounting hole is located the side of connecting hole just is close to one side of cutting section.

Further, the second fixed end of the spring comprises a first fixed rod fixedly connected with the end of the spring body and a second fixed rod perpendicular to the first fixed rod, and the first fixed rod is parallel to the axis of the spring body.

Specifically, one end of the second fixing rod is fixedly connected with the first fixing rod, and the other end of the second fixing rod extends towards the center of the spring body.

Further, the blade fixing seat further comprises a blade positioning column arranged on the cutter head and located on the side face of the annular ring and capable of being abutted against the side face of the blade.

Further, the blade mounting structure further comprises two dustproof gaskets respectively arranged between the blade fixing seat and the blade and between the connecting piece and the blade.

The blade mounting structure provided by the invention has the beneficial effects that: the spring is used for movably connecting the cutter head with the blades, when the cutter head rotates at a high speed, the spring is elastically deformed by the centrifugal force generated by the high-speed rotation of the cutter head and generates acting force on the blades, and the acting force generated by the spring on the blades can effectively improve the cutting force of the blades, so that the effect of improving the cutting effect of the whole cutter head is achieved.

The invention also provides a mower which comprises the blade mounting structure and an engine for driving the cutter head in the blade mounting structure.

The mower provided by the invention has the beneficial effects that: by adopting the blade mounting structure, the cutting force of the blade is improved on the premise of not increasing the power of an engine and the thickness of the blade, so that the effect of improving the cutting effect of a cutter head is achieved, and the service lives of a battery, a generator and the blade of the mower are prolonged; on the premise of keeping the same cutting effect of the cutter head, the power of the engine or the thickness of the blades can be reduced, so that the noise of the engine and the production and processing costs of the engine and the blades can be reduced, and a quieter working environment can be obtained.

Drawings

Fig. 1 is a schematic perspective view of a blade mounting structure according to a first embodiment of the present invention;

fig. 2 is a schematic perspective exploded view of a blade mounting structure according to a first embodiment of the present invention;

fig. 3 is a sectional view of a blade mounting structure provided in a first embodiment of the present invention;

FIG. 4 is a perspective view of a spring in a blade mounting structure according to a first embodiment of the present invention;

fig. 5 is a force diagram of a blade in a blade mounting structure provided in accordance with a first embodiment of the present invention;

fig. 6 is a partial perspective view of a blade mounting structure according to a first embodiment of the present invention;

fig. 7 is a schematic perspective exploded view of a blade mounting structure according to a second embodiment of the present invention;

fig. 8 is a sectional view of a blade mounting structure provided in a second embodiment of the present invention.

In the figure: 100(200) -a blade mounting structure;

10-blade, 11-mounting section, 111-connecting hole, 112-second mounting hole, 12-cutting section and 121-blade;

20-cutter head, 21-blade fixing seat, 211-mounting column, 212-annular ring, 213-mounting space, 214-first mounting hole and 215-blade positioning column;

30-connecting piece, 31-fixing part and 32-connecting column;

40-spring, 41-spring body, 42-first fixed end, 43-second fixed end, 431-first fixed rod, 432-second fixed rod;

50-dustproof gasket, 51-through hole and 52-waist-shaped hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-5, a blade mounting structure 100 according to a first embodiment of the present invention, and referring to fig. 6 and 7, a blade mounting structure 200 according to a second embodiment of the present invention are provided. The blade mounting structure 100(200) provided by the invention is suitable for various mowers, in particular to an automatic mower (Robotic LawnPower). The blade mounting structure 100(200) can improve the cutting force of the blade 10 and the cutting effect of the cutter disc 20 on the premise of not changing the power of a driving motor of the cutter disc or the blade, so that the mower obtains more excellent performance.

The first embodiment is as follows:

fig. 1 is a schematic perspective view of a blade mounting structure 100 according to a first embodiment of the present invention. The blade mounting structure 100 includes a plurality of blades 10 and a cutter head 20. The cutter head 20 is a rotating part used for cutting at the bottom of the mower, an engine for driving the cutter head 20 is arranged on the mower, and the cutter head 20 is driven to rotate at a high speed through the fixed connection of the engine and the cutter head 20. As shown in fig. 1, the cutter head 20 is provided with a plurality of blade holders 21 along a circumferential direction thereof. Five blade fixing seats 21 are uniformly distributed at the bottom of the cutter head 20 around the circumference of the cutter head, and each blade fixing seat 21 is provided with a corresponding blade 10. Namely, the blade holders 21 on the cutter head 20 are arranged in one-to-one correspondence with the blades 10, the number of the blade holders 21 arranged at the bottom of the cutter head 20 is the same as the number of the blades 10, and the position of the blade holder 21 is the fixed position of the blade 10. When the cutter head 20 rotates at a high speed along with the engine, the blades 10 fixed on the blade fixing seat 21 also rotate at a high speed along with the rotation of the cutter head 20, and effectively cut a touched object in the rotating process. The blade fixing seat 21 and the cutter head 20 in the cutter head 20 provided by the invention can be integrally formed or are processed independently and then connected into a whole. The mounting post 211, the annular ring 212 and the blade positioning post 215 in the blade fixing seat 21 are made of the same material.

Fig. 2 is a schematic perspective exploded view of the blade mounting structure 100 according to the present invention. The blade mounting structure 100 further includes a connecting member 30 for fixing the blade 10 to the blade holder 21, and a spring 40 disposed in the blade holder 21 for movably connecting the blade 10 to the blade holder 21. In the blade mounting structure 100, the blade 10 is fixed in the blade fixing seat 21 of the cutter head 20 through the connecting piece 30, so that the relative fixed connection between the blade 10 and the cutter head 20 is realized. The connecting member 30 may be a screw, a rivet, a bolt, or the like that may be used to achieve the connection between the two. A spring 40 is further arranged between the blade 10 and the cutter disc 20, one end of the spring 40 is fixed in the blade fixing seat 21, and the other end of the spring 40 is fixed on the blade 10, so that the blade 10 and the blade fixing seat 21 are movably connected through the spring 40.

As shown in figure 5 of the drawings,a force diagram of a blade mounting structure 100 provided by the present invention. When the cutter head 20 rotates at a high speed with the engine, a centrifugal force F is generated due to the high-speed rotation₁The centrifugal force F₁Acting simultaneously on the knives 10 and the knife holders 21 of the knife disc 20, the centrifugal force F₁Is transmitted to the spring 40 through the fixed connection, so that the spring 40 generates torsional elastic deformation in the blade holder 21, and the elastic deformation of the spring 40 in the blade holder 21 generates a reaction force F₂Reaction force F of spring 40₂When acting on the blade 10, the cutting force of the blade 10 will be at the original centrifugal force F₁On the basis of (2) adding a reaction force F₂So that the cutting force of the blade 10 is effectively enhanced.

Fig. 4 is a schematic perspective view of the spring 40 in the blade mounting structure 100 according to the present invention. The spring 40 includes a spring body 41 disposed in a spiral shape, and a first fixing end 42 and a second fixing end 43 located at both sides of the spring body 41. The spring body 41, the first fixing end 42 and the second fixing end 43 of the spring 40 provided by the invention are formed by winding a metal wire. The spring body 41 is formed by winding a wire around the same axis and along the same radius of rotation. The first fixed end 42 and the second fixed end 43 on both sides of the spring body 41 are vertical sections in which both end portions of the wire are bent and then extend to both side surfaces of the spring body 41. The space for elastic deformation of the spring 40 is realized by the spring body 41, and the first fixed end 42 and the second fixed end 43 on both sides of the spring body 41 are respectively fixedly connected with the blade fixing seat 21 and the blade 10 of the cutter head 20.

Further, as shown in fig. 3, a full sectional view of the blade mounting structure 100 provided by the present invention is provided. In the blade mounting structure 100 provided by the present invention, when the blade 10 is fixed in the cutter head 20 by the connecting member 30, the spring 40 is disposed inside the blade fixing seat 21, and the first fixed end 42 of the spring 40 is fixedly connected with the blade fixing seat 21, and the second fixed end 43 of the spring 40 is fixedly connected with the blade 10, so that the spring 40 can simultaneously receive the centrifugal force F generated by the blade 10 and the cutter head fixing seat 21 due to high-speed rotation₁。

Specifically, as shown in fig. 3, a first mounting hole 214 is formed in the blade holder 21 of the cutter head 20, and the first fixing end 42 is inserted and fixed therein, and a second mounting hole 112 is formed in the blade 10, and the second fixing end 43 is inserted and fixed therein. The spring body 41 of the spring 40 in the blade mounting structure 100 is disposed in the blade holder 21, and the first fixing end 42 is inserted into the first mounting hole 214 of the blade holder 21 and the second fixing end 43 is inserted into the second mounting hole 112 of the blade 10. The spring 40 is simultaneously locked in the blade holder 21 when the attachment 30 secures the blade 10 to the blade holder 21.

Further, as shown in fig. 2, the blade holder 21 of the cutter head 20 provided by the present invention includes a mounting post 211 provided on the cutter head 20 for fixing the connecting member 30, and an annular ring 212 surrounding the mounting post 211. The mounting post 211 and the annular ring 212 are integrally formed with the cutter disc 20, as shown in fig. 3, the mounting post 211 extends downward from the bottom surface of the cutter disc 20 to form a protrusion for fixing the connecting member 30, and the annular ring 212 also extends downward from the bottom surface of the cutter disc 20 and surrounds the outside of the mounting post 211. As shown in fig. 3, the annular ring 212 is coaxially disposed with the mounting post 211, and a gap is formed between the annular ring 212 and the mounting post 211, such that a mounting space 213 for accommodating the spring 40 is formed between the mounting post 211 and the annular ring 212. As shown in fig. 3, the height of the spring body 41 of the spring 40 provided by the present invention is smaller than the height of the mounting post 211, so that when the spring 40 is placed in the mounting space 213, the spring body 41 of the spring 40 has a certain compression space, i.e. a certain elastic deformation space, thereby ensuring that the spring 40 can provide a reverse acting force F for the blade 10 when rotating at a high speed₂。

Specifically, as shown in fig. 3, the first mounting hole 214 provided in the blade holder 21 of the present invention is provided at the bottom of the mounting space 213 and penetrates through the cutter head 20. The first mounting hole 214 extends through the entire impeller 20 from the bottom surface of the impeller 20 to the top surface of the impeller 20. When the spring 40 is placed inside the blade holder 21, the first fixed end 42 of the spring 40 is inserted into and fixed in the first mounting hole 214, and passes through the first mounting hole when the cutter head 20 rotates rapidlyThe mutual contact of the mounting hole 214 and the first fixing end 42 to release the centrifugal force F₁To the spring 40.

As shown in fig. 4, the first fixed end 42 of the spring 40 provided by the present invention is bent from the end of the spring body 41 and extends along the side away from the spring body 41. The first fixed end 42 is located at one side end of the spring body 41, and the first fixed end 42 is parallel to the axis of the spring body 41, and the first fixed end 42 is perpendicular to the spring body 41. When the spring 40 is fixed in the blade holder 21, the first fixing end 42 is completely inserted into the first fixing hole 214 and locks the blade 10 to the blade holder 21 by the connecting member 30, and the entire spring 40 is confined in the installation space 213 of the blade holder 21.

Further, as shown in fig. 2, the blade 10 of the present invention has an elongated sheet-like structure, and the blade 10 has a mounting section 11 fixed to the cutter head 20 and a cutting section 12 located outside the cutter head 20. Wherein the mounting section 11 and the cutting section 12 are located at both ends of the sheet structure, respectively. When the cutter 10 is fixed on the cutter fixing seat 21, the mounting section 11 is positioned at the bottom of the cutter fixing seat 21, and the cutting section 12 is positioned outside the circumference of the cutter disc 20. And acute-angled blades 121 are formed on both side surfaces of the cutting segment 12, as shown in fig. 5 and 6, the blades 121 are located on both side surfaces of the cutting segment 12 to form blade surfaces having a sharp cutting effect, so that cutting can be performed during high-speed rotation.

Specifically, as shown in fig. 2, the mounting section 11 of the blade 10 is provided with a connection hole 111 through which the connection member 30 can pass, and the second mounting hole 112 is located at a side of the connection hole 111 and close to the cutting section 12. When the blade 10 is mounted, the connecting member 30 is fixed to a mounting hole provided at the center of the mounting post 211 through the connecting hole 111. When the connecting member 30 is fixed to the mounting post 211, the connecting member 30 presses the blade 10 onto the bottom surface of the blade holder 21, and abuts the spring bodies 41 of the springs 40 onto the side surfaces of the blade 10 and the bottom surface of the mounting space 213, respectively. When the blade 10 is fixed by the connecting piece 30, the spring 40 also provides a vertical supporting preload for the blade 10, and when the side surface of the cutting section 12 of the blade 10 collides with a hard obstacle on the lawn when the cutter head 20 rotates at a high speed, the blade 10 rotates along with the axis of the connecting piece 30 and presses the spring body 41 of the spring 40 during rotation, and the spring body 41 elastically deforms along with the axis to absorb the impact force of the hard obstacle, so that the damage of the hard obstacle to the blade 10 is avoided as much as possible. As shown in fig. 1, in the initial state, the blade 10 is fixed along the radial direction of the cutter head 20, and when the blade 10 collides with a hard obstacle, the blade 10 will rotate relative to the cutter head 20, and the blade 10 rotates toward the center of the cutter head 20, thereby twisting the spring 40 in the blade holder 21.

Specifically, as shown in fig. 4, the second fixing end 43 of the spring 40 provided by the present invention includes a first fixing rod 431 fixedly connected to an end of the spring body 41 and a second fixing rod 432 perpendicular to the first fixing rod 431, and the first fixing rod 431 and the axis of the spring body 41 are parallel to each other. The second fixed end 43 of the spring 40 is used to achieve a fixed connection between the spring 40 and the blade 10. The first fixing rod 431 and the second fixing rod 432 are both formed by bending the same wire of the spring 40. The first fixing rod 431 is perpendicular to the spring body 41, and the first fixing rod 431 and the second fixing rod 432 are perpendicular to each other, so that when the blade 10 rotates relative to the spring 40, the second fixing end 32 is always fixedly connected with the blade 10, and the spring body 41 is twisted along with the rotation of the blade 10 to generate elastic deformation.

Specifically, as shown in fig. 4, in the present embodiment, one end of the second fixing rod 432 in the second fixing end 43 of the spring 40 is fixedly connected to the first fixing rod 431, and the other end extends toward the center of the spring body 41. The second fixing rod 432 extends toward the center of the spring body 41, so that when the connecting member 30 fixes the blade 10, the first fixing rod 431 of the second fixing end 43 is inserted into the second fixing hole 112 of the blade 10, the second fixing rod 432 can abut against the side surface of the blade 10, and, through the fixed connection between the connecting member 30 and the blade holder 21, the bottom surface of the spring body 41 of the spring 40 abuts against the blade 10, vertical pre-tightening force is provided to the blade 10, and tight fitting between the blade 10 and the connecting member 30 is maintained, and the second fixing rod 432 in the second fixing end 43 is located between the blade 10 and the connecting member 30. The second fixing rod 432 is provided such that the second fixing end 43 is not separated from the blade 10 by the rotation of the blade 10 and always maintains the fixed connection of the blade 10 with the spring 40.

Further, as shown in fig. 6, there is provided an enlarged partial view of one of the blade holders 21 in the blade mounting structure 100 of the present invention. The blade fixing seat 21 in the cutter head 20 provided by the invention further comprises a blade positioning column 215 which is arranged on the cutter head 20 and positioned on the side surface of the annular ring 212 and can be abutted with the side surface of the blade 10. The insert retention post 215 is located at the edge of the cutter head 20 and is located to the side of the mounting post 211. The insert positioning post 215 is used to abut against the insert 10 attached to the mounting post 211, thereby preventing the insert 10 from rotating in the same direction as the cutter head 20. That is, if the cutter head 20 rotates counterclockwise, the blade positioning post 215 is located at the right side of the blade 10, so as to prevent the blade 10 from rotating counterclockwise; if the cutter disc 20 is rotated clockwise, the blade positioning post 215 is located at the left side of the blade 10, thereby preventing the blade 10 from rotating clockwise.

Example two:

fig. 7 is a schematic perspective exploded view of a blade mounting structure 200 according to a second embodiment of the present invention. The blade mounting structure 200 is different from the first embodiment in that the blade mounting structure 200 further includes two dust-proof gaskets 50 respectively disposed between the blade holder 21 and the blade 10 and between the connecting member 30 and the blade 10. Fig. 8 is a cross-sectional view of a blade mounting structure 200 according to a second embodiment of the present invention. Two dustproof gaskets 50 in this blade mounting structure 200 are located the upper and lower both sides side of blade 10 respectively, and when connecting piece 30 locked on the erection column 211 of blade fixing base 21, compress tightly two dustproof gaskets 50 in the both sides side of blade 10, play the effect to the dustproof seal near blade 10.

In the practical use of the mower, dust, debris, dust and grass are collected near the cutter head 20, and the impurities tend to splash into the installation gap of the blade 10 along with the high-speed rotation of the cutter head 20. And if the impurities are wetted and agglomerated in the blade 10 or the blade fixing seat 21, the springs 40 in the blade fixing seat 21 are directly affected, so that the springs 40 lose elasticity and cannot realize the twisting function, and meanwhile, the wetted and agglomerated impurities near the blade 10 also cause the blade 10 to be incapable of turning to and avoiding hard objects in the operation process. Therefore, the two dust-proof gaskets 50 provided in the second embodiment of the present invention are disposed on the front and back sides of the blade 10, so that when the cutter head 20 rotates at a high speed for mowing, impurities outside the blade 10 can be prevented from entering the periphery of the blade 10 and the blade fixing seat 21 through the installation gap of the blade 10, and the service lives of the spring 40 and the blade 10 can be greatly prolonged, and the use experience of the blade 10 in a high-speed working state can be improved.

Specifically, as shown in fig. 7 and 8, the radius of the dust-proof gasket 50 between the cutter 10 and the cutter holder 21 of the cutter head 20 should be greater than or equal to the radius of the annular ring 212 of the cutter holder 21, so that the mounting post 211 and the annular ring 212 of the cutter holder 21 can be completely covered. Moreover, the dustproof gasket 50 located between the cutter 10 and the cutter holder 21 of the cutter head 20 can completely seal the top of the mounting space 213 between the mounting column 211 and the annular ring 212 of the cutter holder 21, so as to prevent impurities from being splashed into the mounting space 213 for placing the spring 40 from the mounting gap between the cutter 10 and the cutter holder 21. The radius of the dustproof gasket 50 between the blade 10 and the connecting member 30 should be smaller than or equal to the radius of the fixing portion 31 of the connecting member 30, so that the dustproof gasket 50 can be completely disposed on the side of the connecting member 30 opposite to the blade 10. In the present embodiment, as shown in fig. 8, the radius of the dust-proof gasket 50 between the insert 10 and the connecting member 30 is the same as the radius of the fixing portion 31 of the connecting member 30, so that the dust-proof gasket 50 can completely cover the side of the fixing portion 30 of the connecting member 30.

As shown in fig. 7, a through hole 51 through which the connecting member 30 can pass is formed at the center of the dust-proof gasket 50, so that the connecting member 30 can pass through the through hole 51 and extend into the first mounting hole 241 of the blade holder 21, and the two dust-proof gaskets 50 and the blade 10 are fixed to the blade holder 21. And, the aperture of the through hole 51 can be smaller than or equal to the diameter of the connecting column 32 of the connecting piece 30, so as to ensure that the joint between the connecting piece 30 and the blade fixing seat 21 can be effectively sealed. The dustproof gasket 50 is further provided with a waist-shaped hole 52 for the second fixed end 43 of the spring 40 to pass through, and the waist-shaped hole 52 can facilitate the second fixed rod 432 of the spring 40 to pass through and can also be used for accommodating the second fixed rod 432. The waist-shaped hole 52 formed in the dust-proof gasket 50 located between the blade 10 and the blade holder 21 facilitates the spring 40 to pass through, and the waist-shaped hole 52 formed in the dust-proof gasket 50 located between the blade 10 and the connecting member 30 facilitates the second fixing rod 432 to be received therein.

Furthermore, the dustproof gasket 50 provided by the invention is processed by sponge materials, and the thickness of the dustproof gasket 50 is controlled to be 0.5mm-2 mm. The most preferred thickness of the dust gasket 50 is 1 mm. When the connecting member 30 is locked to the mounting post 211 of the cutter head 20, the connecting member 30 presses the dust-proof gaskets 50 located at both sides of the cutter blade 10, and the thickness of the dust-proof gasket 50 is compressed to about 0.5 mm. Adopt sponge's dustproof gasket 50 not only can reduce dustproof gasket 50 and blade 10, frictional force between blade fixing base 21 and the connecting piece 30, thereby can guarantee that blade 10 can keep relative smooth rotation wherein, simultaneously, certain elastic space can also be taken into account simultaneously to this sponge's dustproof gasket 50, under the state of compression, can fill up the produced clearance of installation between blade 10 and blade mount pad 21 or blade 21 and the connecting piece 30, thereby can play the effect that separation external impurity got into blade 10 and blade fixing base 21.

The blade mounting structure 100 according to the first embodiment and the blade mounting structure 200 according to the second embodiment of the present invention each have a spring 40 for movably coupling the cutter head 20 and the blade 10, and when the cutter head 20 rotates at a high speed, the spring 40 is subjected to a centrifugal force F by which the cutter head 20 rotates at a high speed₁Elastically deformed and generating a reaction force F on the insert 10₂Reaction force F generated by spring 40 on blade 10₂The cutting force of the blades 10 can be effectively improved, so that the effect of improving the cutting effect of the whole cutter disc 20 is achieved. The present invention provides an insert mounting structure 10In 0, a spring 40 is arranged between the blade 10 and the cutter disc 20, and the reaction force F of the spring 40 on the blade 10 can be adjusted by selecting springs 40 with different torques₂To adjust the cutting force of the lifting blade 10. The cutting force generated by the blades 10 during high speed rotation is partially the centrifugal force F generated by the high speed rotation of the cutter head 20₁The other part is the throwing force generated by the rotation acceleration of the blade 10 during the rotation process due to the self gravity, and the other part is the reaction force F generated by the elastic deformation of the spring 40 due to the high-speed rotation₂The cutting force of the blade 10 is developed by the combined action of the above-mentioned three forces. The blade mounting structure 100(200) provided by the invention can improve the cutting force of the blade 10 on the premise of not changing the self weight and thickness of the blade 10. Meanwhile, the elastic deformation of the spring 40 provides a certain elastic movement space for the blade 10, so that the blade 10 can have a certain avoiding effect when encountering a hard obstacle.

The invention also provides a mower which comprises the blade mounting structure 100 and an engine for driving the cutter head 20 in the blade mounting structure 100. By adopting the blade mounting structure 100, the cutting force of the blade 10 is improved on the premise of not increasing the power of an engine and the thickness of the blade 10, so that the cutting effect of the cutter disc 20 is improved, and the service lives of a battery, a generator and the blade 10 of the mower can be prolonged; on the premise of keeping the same cutting effect of the cutter disc 20, the power of the engine or the thickness of the blade 10 can be reduced, so that the noise of the engine and the production and processing cost of the engine and the blade 10 can be reduced.

The conventional lawn mower generally uses an engine with a rotation speed of 3000rpm to achieve the basic cutting effect required by the cutter head 20. The mower provided by the invention adopts the blade mounting structure 100, and can be matched with the engine with the rotating speed of less than 3000rpm to achieve the same cutting effect, so that the cost of the engine can be reduced, the noise generated by the engine can be reduced, the load of the engine can be reduced, the energy consumption of a battery can be reduced, and the service lives of the motor and the battery can be prolonged. Due to the adoption of the blade mounting structure 100 provided by the invention, the processing cost, the product energy consumption and the operation noise of the whole mower can be reduced on the premise of ensuring the same cutting effect.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A blade mounting structure comprises a plurality of blades and a cutter head, and is characterized in that a plurality of blade fixing seats are arranged on the cutter head along the circumferential direction of the cutter head, the blade fixing seats and the blades are arranged in a one-to-one correspondence manner, the blade mounting structure further comprises a connecting piece for fixing the blades on the blade fixing seats and a spring which is arranged in the blade fixing seats and movably connects the blades with the blade fixing seats;

the spring comprises a spring body which is spirally arranged, and a first fixed end and a second fixed end which are positioned at two sides of the spring body, wherein the first fixed end of the spring is fixedly connected with the blade fixing seat, and the second fixed end of the spring is fixedly connected with the blade;

the blade fixing seat is internally provided with a first mounting hole for the first fixing end to be inserted and fixed, and the blade is provided with a second mounting hole for the second fixing end to be inserted and fixed.

2. The structure of claim 1, wherein the blade holder includes a mounting post disposed on the cutter head for securing the connecting member and an annular ring surrounding the mounting post, and a mounting space is defined between the mounting post and the annular ring for accommodating the spring.

3. The insert mounting structure as claimed in claim 2, wherein said first mounting hole is provided at a bottom of said mounting space and penetrates said cutter head.

4. A blade mounting structure according to claim 3 wherein a first fixed end of said spring is bent from an end of said spring body and extends along a side remote from said spring body, said first fixed end being parallel to an axis of said spring body.

5. The structure of claim 2, wherein the blade has a mounting section fixed to the cutter head and a cutting section located outside the cutter head, the mounting section of the blade is provided with a connecting hole for the connecting member to pass through, and the second mounting hole is located at a side of the connecting hole and close to one side of the cutting section.

6. The blade mounting structure as claimed in claim 5, wherein the second fixing end of the spring includes a first fixing bar fixedly connected to an end of the spring body and a second fixing bar perpendicular to the first fixing bar, the first fixing bar being parallel to an axis of the spring body.

7. The blade mounting structure as claimed in claim 6, wherein said second fixing rod has one end fixedly connected to said first fixing rod and the other end extending toward the center of said spring body.

8. The insert mounting structure of claim 2 wherein the insert retaining bracket further comprises insert positioning posts disposed on the cutter head and positioned on the side of the annular ring and adapted to abut against the side of the insert.

9. The blade mounting structure of claim 1 further comprising two dust spacers disposed between said blade holder and said blade and between said connector and said blade, respectively.

10. A lawnmower comprising a blade mounting arrangement according to any one of claims 1 to 9 and a motor for driving a cutter head in the blade mounting arrangement.