Anti-winding cutting assembly and mowing platform

Abstract

The invention belongs to the technical field of gardening tools, and particularly relates to an anti-winding cutting assembly and a mowing platform, comprising a mounting seat, a driving mechanism and a cutterhead assembly; at least one convex edge is arranged at the bottom of the mounting seat; the driving mechanism comprises a main body and an installation boss fixed to the output end of an output shaft of the main body, the main body is installed on the upper surface of the installation base, and the output shaft penetrates through the bottom of the installation base, so that at least one part of the output shaft and at least one part of the installation boss are located in the protruding edge; the cutter head assembly comprises a limiting piece, a fixed cutter head and a cutting knife; the limiting piece comprises a fixing part, a connecting part and a limiting part which are connected in sequence; aiming at complex working conditions, the invention comprehensively provides the laminated cross protection structure cutter head, and the working efficiency of the cutting cutter head under the complex working conditions is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gardening tools, and particularly relates to an anti-winding cutting assembly and a mowing platform. Background Art

[0002] With the development of gardening tools, as an efficient lawn maintenance device, a lawn mower is widely used in household and commercial scenarios. However, during the actual working process, when the blade of the lawn mower rotates at a high speed, it is prone to a stall phenomenon when hitting hard objects such as stones and tree roots. At this time, the blade will receive a reverse impact force, which is transmitted to the output shaft assembly through the blade, and even further transmitted to the power supply device (such as a motor), resulting in deformation or fracture of the output shaft, or damage to key components such as internal gears and bearings of the motor, seriously affecting the service life and safety of the device.

[0003] For this reason, Chinese Utility Model Patent No. CN220965616U discloses a blade fixing structure and a lawn mower, including a connecting member connected to the motor output shaft assembly of the lawn mower; at least one blade fixedly connected to the connecting member; wherein, a boss is provided on the connecting member, and the blade is installed in cooperation with the boss to achieve fixation, and the connecting member and the motor output shaft assembly are connected by interference fit. This solution installs the blade in cooperation with the boss on the connecting member and connects the connecting member and the motor output shaft assembly by interference fit. When the blade is impacted, the connecting member can rotate relative to the motor output shaft, thereby buffering the impact force and reducing the damage to the motor and the output shaft.

[0004] For another example, a cutting cutter head mentioned in the applicant's prior application CN119117149B includes a bent cutter head and a blade. A first through hole is provided on the bent cutter head, and a second through hole cooperating with the first through hole is provided on the blade. The bent cutter head and the blade are connected by bolts (preferably through bolts), and the bolts shrink from the head to the end direction towards the center axis direction of the bolts to form a first step and a second step respectively; when the bolts sequentially pass through the second through hole and the first through hole, the blade and the bent cutter head are respectively located on the first step and the second step, so that when the resistance received by the blade is less than or equal to a first force, the blade and the bent cutter head rotate synchronously, and when the resistance received by the blade is greater than the first force, the blade can rotate relative to the bent cutter head to avoid hard objects.

[0005] Although the above solutions alleviate the problem of being easily damaged when hitting hard objects to a certain extent, for complex terrains, when cutting tall grass, long grass or vine-like plants, the grass stems are easily wound around the cutter shaft, resulting in the jamming of the cutter shaft, and even problems such as loose installation bolts and blade detachment, affecting the operation efficiency and bringing safety hazards.

[0006] Therefore, a more reliable and durable blade fixing structure and a lawn mower design are provided to improve its anti-impact and anti-winding capabilities under complex working conditions. Summary of the Invention

[0007] The purpose of the present invention is to provide an anti-winding cutting assembly and a mowing platform to improve the working efficiency of the lawn mower under complex working conditions.

[0008] To solve the above-mentioned technical problems, the present invention specifically adopts the following technical solutions: An anti-winding cutting assembly includes: a mounting seat, a driving mechanism, and a cutter disc assembly; At least one convex edge is provided at the bottom of the mounting seat; The driving mechanism includes a main body and a mounting portion fixed to the output end of the output shaft of the main body. The main body is mounted on the upper surface of the mounting seat, and the output shaft passes through the bottom of the mounting seat; The cutter disc assembly is provided with a grass-blocking inclined surface with a certain inclination, so that the cutter disc assembly has an open third protection space with an inner diameter gradually increasing from top to bottom. A third mounting hole is provided at the top of the third protection space, and the mounting portion is fixed in the third mounting hole. The grass-blocking inclined surface, the convex edge, and the bottom of the mounting seat jointly enclose a closed second protection space, and at least a part of the output shaft (4015) is located in the second protection space.

[0009] As an improvement, it further includes a locking member and a fastening member. The first end of the locking member is fixed to the mounting portion, and the fastening member is fixed to the second end of the locking member. The fastening member and the bottom of the output shaft cooperate to form a clamping structure for simultaneously clamping the mounting portion and the cutter disc assembly to axially limit the cutter disc assembly.

[0010] As an improvement, the convex edge includes an outer convex edge and an inner convex edge sequentially arranged from outside to inside at the bottom of the mounting seat. The height of the outer convex edge is higher than that of the inner convex edge; the inner convex edge, the bottom of the mounting seat, and the top of the cutter disc assembly jointly form a closed first protection space; the grass-blocking inclined surface, the outer convex edge, the inner convex edge, and the bottom of the mounting seat enclose the second protection space.

[0011] As an improvement, it further includes an anti-loosening spacer sleeve. The top of the anti-loosening spacer sleeve is clamped between the mounting portion and the fastening member and extends downward to form an open fourth protection space inside the third protection space, and the fastening member is located in the fourth protection space.

[0012] As an improvement, the obtuse angle between the grass-blocking inclined surface and the horizontal plane ranges from 120° to 150°.

[0013] As an improvement, a second mounting hole is further provided on the cutter head assembly. When the fixing member passes through the second mounting hole and the mounting seat in sequence for fixation, the cutter head assembly and the mounting seat can be relatively fixed.

[0014] As an improvement, the cutter head assembly includes a limiting member, a fixed cutter head, and a cutting knife. The limiting member includes a fixed portion, a connecting portion, and a limiting portion connected in sequence; a first mounting hole is provided on the fixed cutter head, and a fourth mounting hole is provided on the cutting knife. When the limiting member passes through the fourth mounting hole and the first mounting hole in sequence, the first mounting hole is sleeved outside the fixed portion, the fourth mounting hole is sleeved outside the connecting portion and is restricted between the fixed cutter head and the limiting portion, and the height of the connecting portion is greater than the height of the cutting knife; when the output shaft is driven to rotate, the output shaft can drive the fixed cutter head and the cutting knife to rotate synchronously. When the cutting knife encounters an obstacle, the cutting knife can rotate relative to the fixed cutter head to achieve buffering.

[0015] As an improvement, the first mounting hole is a special-shaped mounting hole, and the fixed portion is a special-shaped fixed portion matching the shape of the first mounting hole.

[0016] As an improvement, a protective sleeve is further included. The protective sleeve is provided with a special-shaped hole having the same shape as the first mounting hole, and the protective sleeve forms a fifth protective space that wraps the fixed portion.

[0017] As an improvement, it includes a cutting platform and at least one cutting assembly installed at the bottom of the cutting platform. A grass guide ring is circumferentially arranged around the cutting assembly, and the grass guide ring extends to one side of the cutting platform to form a grass outlet; the cutting assembly includes a mounting seat, a driving mechanism, and a cutter head assembly; at least one convex edge is provided at the bottom of the mounting seat; the driving mechanism includes a main body and a mounting portion fixed to the output end of the output shaft of the main body. The main body is installed on the upper surface of the mounting seat, and the output shaft passes through the bottom of the mounting seat; the cutter head assembly is provided with a grass-blocking inclined surface with a certain inclination, so that the cutter head assembly has an open third protective space with an inner diameter gradually increasing from top to bottom. A third mounting hole is provided at the top of the third protective space, and the mounting portion is fixed in the third mounting hole. The grass-blocking inclined surface, the convex edge, and the bottom of the mounting seat jointly enclose a closed second protective space, and at least a part of the output shaft is located in the second protective space.

[0018] The principle and beneficial technical effects of the present invention are as follows: In response to complex working conditions (such as tall grass, long grass, especially vines, etc.), where grass stems are easily entangled in the cutting shaft, the present application comprehensively provides a stacked cross-protection structure design with a reinforced structure, so that the cutting assembly can remain firmly connected during long-term unobstructed operation.

[0019] First, the present application employs stacked, cross-sectional protective spaces above and below the cutterhead assembly. The output shaft is enclosed within a closed second protective space, while the connection between the mounting portion and the cutterhead assembly is protected by an open third protective space. When a small amount of weeds enter the third protective space, its open structure, combined with the centrifugal force generated by the rotation of the cutterhead and the weeds' own gravity, allows for instantaneous shedding. The closed second protective space minimizes or blocks the path for long weeds to wind upward around the output shaft, preventing long weeds (especially vines) from simultaneously entwining the output shaft and fasteners. Furthermore, the "visualization" structure of the open third protective space not only enables real-time observation of operating conditions but also allows tools to directly access fasteners, effectively reducing the difficulty of equipment maintenance.

[0020] Furthermore, the inclination angle design of the grass-blocking slope is dynamically matched with the rotation speed of the cutter disc, so that the debris obtains tangential acceleration after contacting the slope, further enhancing the throwing efficiency, especially for the adhesion problem of vine-like high-toughness weeds.

[0021] Furthermore, the four protective spaces located on both sides of the fixed cutter disc provide multi-dimensional protection for the output shaft and fasteners at different heights (for example, the lower half of the first protective space overlaps with the upper half of the second protective space, and for another example, the lower half of the second protective space overlaps with the upper half of the third protective space). The structure is compact, and the overlapping areas of the four protective spaces form a "labyrinth seal" effect. Even if high-density grass clippings break through the outer layer of protection and enter the second or third protective space, they will stall and settle in the cross space due to the sudden change in the direction of the centrifugal force field, making it difficult to further reach the output shaft sealing area (that is, the first protective space).

[0022] Furthermore, the present application reinforces the connection parts (for example, the fixed cutter disc is clamped by a clamping structure, and the fixed cutter disc and the cutting knife are connected by a limiting member with a special-shaped fixing portion). On the one hand, it can avoid the problem of loosening of the connection parts due to excessive resistance of obstacles to the cutting knife. On the other hand, it can enable the entanglement-free cutter disc to maintain a stable connection during long-term unobstructed operation.

[0023] In summary, the stacked cross protection structure in the present application can prevent uncut long grass from entering the output shaft during the cutting process, and can prevent structures such as the output shaft above the cutter head assembly and the fasteners below the cutter head assembly from being wound simultaneously, thereby affecting the rotation of the output shaft or causing relative rotation between the two. This is particularly applicable to the case where the blade can rotate relative to the cutter head (especially when the blade rotates, it is particularly easy to bring long grass into the central area where the output shaft is located). BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale. Obviously, the following described drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the mowing platform in the embodiment of the present invention; Figure 2 It is a cross-sectional view of the cutting assembly in the embodiment of the present invention; Figure 3 It is a schematic diagram of the cutter head assembly in the embodiment of the present invention; Figure 4 It is a schematic diagram of the fixed cutter head in the embodiment of the present invention; Figure 5 It is a schematic diagram of the limiting member in the embodiment of the present invention; Figure 6 It is a schematic diagram of the protective sleeve in the embodiment of the present invention; Figure 7 It is a schematic diagram of the cutting knife in the embodiment of the present invention; Figure 8 It is a schematic diagram of the driving mechanism in the embodiment of the present invention; Figure 9 It is a schematic diagram of the anti-loosening member in the embodiment of the present invention; Figure 10 It is a schematic diagram of the anti-loosening spacer sleeve in the embodiment of the present invention; Figure 11 It is a schematic diagram of the mounting seat in the embodiment of the present invention; Figure 12 It is a partial cross-sectional view of the cutting assembly in the embodiment of the present invention; Figure 13 It is a schematic diagram of the structure of the fixing member in the embodiment of the present invention; Figure 14 It is a schematic diagram of the angled cutting knife in the embodiment of the present invention.

[0026] Markings in the figure: 1. Rear protection component; 2. Cutting platform; 3. Side protection component; 4. Cutting component; 5. Front protection component; 201. Grass guiding ring; 401. Driving mechanism; 402. Mounting seat; 403. Cutter head assembly; 404. Fixing part; 405. Anti-loosening spacer sleeve; 406. Anti-loosening part; 407. Fastening part; 4011. Limit card slot; 4012. Anti-loosening hole; 4013. Mounting part; 4014. Locking part; 4015. Output shaft; 4016. Main body; 40301. Fixed cutter head; 4021. Outer convex edge; 4022. Inner convex edge; 40302. Cutting knife; 40303. Protective sleeve; 40304. Limiting part; 403011. First mounting hole; 403012. Second mounting hole; 403013. Third mounting hole; 403014. Limit card teeth; 403015. Grass blocking slope; 403016. Cutter head folding edge; 403021. Fourth mounting hole; 403022. Cutting edge; 403031. Fifth mounting hole; 403032. Protective edge; 403041. Connecting part; 403042. Fixing part; 403043. Limiting part; 40401. Button; 40402. Limiting section; 40403. Locking and mating section; 40404. Locking bead; 408. First protection space; 409. Second protection space; 410. Fifth protection space; 411. Fourth protection space; 412. Third protection space. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In this article, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of explaining the present invention and have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably. In this article, terms such as "upper", "lower", "inner", "outer", "front", "rear", "one end", "the other end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In this text, unless otherwise clearly defined and limited, terms such as "installed", "equipped with", "connected", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In this text, "a plurality of" means two or more, that is, it includes two, three, four, five, etc.

[0030] Embodiment 1 See Figures 2 - 13 , this embodiment provides an anti-tangling cutting assembly 4. See Figure 2 , the cutting assembly 4 includes a mounting base 402, a driving mechanism 401, and a cutter head assembly 403.

[0031] At least one convex edge is provided at the bottom of the mounting base 402. In some embodiments, the convex edge extends downward along the height direction of the mounting base 402.

[0032] See Figure 8 , the driving mechanism (such as a motor) includes a main body 4016, and a mounting portion 4013 fixed to the output end of the output shaft 4015 of the main body 4016. The main body 4016 is mounted on the upper surface of the mounting base, and the output shaft 4015 passes through the bottom of the mounting base, so that at least a part of the output shaft 4015 and the mounting portion 4013 are located within the convex edge; that is, a part of the output shaft 4015 is wrapped by the bottom of the mounting base, and the part extending out of the mounting base is located within the convex edge, or a part of the output shaft 4015 and a part of the mounting portion 4013 are simultaneously located within the convex edge.

[0033] See Figure 4 and Figure 12, the cutter head assembly is provided with a grass blocking inclined surface 403015 having a certain inclination, so that the cutter head assembly has an open third protection space 412 with an inner diameter gradually increasing from top to bottom. A third mounting hole 403013 is provided at the top of the third protection space. The mounting part is fixed in the third mounting hole 403013. The grass blocking inclined surface 403015, the convex edge and the bottom of the mounting seat jointly enclose a closed second protection space 409. At least a part of the output shaft is located in the second protection space 409. When the output shaft is driven to rotate, the output shaft can drive the mounting part and the cutter head assembly to rotate synchronously. It should be noted that the above "closed type" is not necessarily completely closed. For example, when the cutter head assembly is connected to the output shaft, due to size limitations or other possible reasons, there will inevitably be a certain gap between the convex edge and the grass blocking inclined surface, but the overall is still in a blocking state. Therefore, the above situation also belongs to the "closed type" in this article.

[0034] In some embodiments, refer to Figure 3 , the cutter head assembly includes a limiting member 40304, a fixed cutter head 40301 and a cutting knife 40302. The limiting member 40304 includes a fixed part, a connecting part and a limiting part connected in sequence; first mounting holes and third mounting holes are respectively provided on the fixed cutter head 40301. The mounting part is fixed in the third mounting hole. The upper surface of the fixed cutter head 40301 and the convex edge enclose a second protection space; a fourth mounting hole is provided on the cutting knife 40302. When the limiting member 40304 passes through the fourth mounting hole and the first mounting hole in sequence, the first mounting hole is sleeved outside the fixed part, the fourth mounting hole is sleeved outside the connecting part and is limited between the fixed cutter head 40301 and the limiting part, and the height of the connecting part is greater than the height of the cutting knife 40302; when the output shaft is driven to rotate, the output shaft can drive the fixed cutter head 40301 and the cutting knife 40302 to rotate synchronously. When the cutting knife 40302 encounters an obstacle, the cutting knife 40302 can rotate relative to the fixed cutter head 40301 to achieve buffering. That is to say, when the cutting knife 40302 encounters a hard object, it can rotate relative to the fixed cutter head 40301 to avoid obstacles. After bypassing the hard object, the cutting knife 40302 can reset under the action of the centrifugal force generated by the high-speed rotating output shaft and the fixed cutter head 40301 and continue to cut.

[0035] In some embodiments, refer to Figure 11, the convex edge includes an outer convex edge 4021 and an inner convex edge 4022 that are sequentially arranged from outside to inside at the bottom of the mounting base 402. The height of the outer convex edge 4021 is higher than that of the inner convex edge 4022; the inner convex edge 4022, the bottom of the mounting base 402, and the top of the fixed cutter disc together form a first protection space; the outer convex edge 4021, the inner convex edge 4022, the upper surface of the grass-blocking inclined surface of the fixed cutter disc, and the bottom of the mounting base 402 together enclose a second protection space. The first protection space and the second protection space are stacked, so as to at least partially overlap, and the two realize stacked cross protection in different dimensions (different heights and different positions), which can effectively prevent long grass vines and the like from winding around the output shaft.

[0036] In some embodiments, refer to Figure 4 , a cutter disc folding edge 403016 is provided at the edge of the fixed cutter disc 40301 to further protect the gap of the second protection space.

[0037] In some embodiments, the mounting portion is in interference fit with the third mounting hole 403013 so that the mounting portion can be fixed in the third mounting hole 403013. In some specific embodiments, at least one limiting tooth 403014 is provided in the third mounting hole 403013. Correspondingly, at least one limiting groove is provided on the mounting portion; or, at least one limiting tooth 403014 is provided on the mounting portion. Correspondingly, at least one limiting groove is provided in the third mounting hole 403013, where the limiting tooth 403014 can be semicircular, and correspondingly, the limiting groove can also be semicircular. By the mutual cooperation of the limiting tooth 403014 and the limiting groove, the lateral connection between the fixed cutter disc 40301 and the mounting portion can be strengthened, further preventing relative displacement in the radial direction between the two, so as to better complete power transmission.

[0038] In some embodiments, refer to Figure 2 , a loosening prevention member 406 is further provided on the mounting portion and the output shaft. The loosening prevention member 406 can be a loosening prevention limit bolt, which passes through the loosening prevention hole on the mounting portion through its own thread structure and is connected to the output shaft to limit and prevent loosening of the two.

[0039] In some embodiments, refer to Figure 2, further comprising a locking member and a fastener 407. The first end of the locking member is fixed to the mounting portion, and the fastener 407 is fixed to the second end of the locking member. The fastener 407 and the bottom of the output shaft cooperate to form a clamping structure for simultaneously clamping the mounting portion and the cutter head assembly 403, so as to axially limit the cutter head assembly 403. Wherein, the locking member can be a locking bolt, and the fastener 407 can be a nut.

[0040] In some embodiments, the locking member passes through the mounting portion and is fixed to the output shaft, that is to say, the locking member is fixed to both the mounting portion and the output shaft at the same time.

[0041] Specifically, referring to Figure 8 , a mounting plane is provided at the bottom of the output shaft 4015, and the area of this mounting plane is larger than the area of the mounting portion 4013. The mounting portion 4013 is located in the third mounting hole, and the top of the fixed cutter head abuts against the mounting plane. The top of the fastener is in contact with both the bottom of the mounting portion 4013 and the fixed cutter head at the same time, that is, the mounting plane and the fastener cooperate to clamp the fixed cutter head and the mounting portion 4013, so as to realize the axial limit between the mounting portion 4013 and the fixed cutter head.

[0042] In some embodiments, referring to Figure 12 , the grass blocking inclined surface 403015 corresponds to the second protection space 409, so that the second protection space 409 is integrally in an inverted triangular or inverted trapezoidal shape. When sundries accidentally enter the second protection space 409, its grass blocking inclined surface 403015 can block the sundries and prevent them from entering the first protection space 408. And with the continuous rotation of the output shaft, the sundries can be thrown out along the grass blocking inclined surface 403015 (outer wall) under the action of centrifugal force, further improving the anti-winding effect.

[0043] In some embodiments, referring to Figure 2 and Figure 12 , further comprising an anti-loosening spacer 405. The top of the anti-loosening spacer 405 is clamped between the mounting portion and the fastener 407, and extends downward to form a fourth protection space 411 inside the third protection space 412, and the fastener 407 is located in the fourth protection space 411. If sundries accidentally enter the third protection space 412, they can also be blocked outside the fourth protection space 411. And with the continuous rotation of the output shaft, the sundries can be thrown out along the grass blocking inclined surface 403015 (inner wall) under the action of centrifugal force, further improving the anti-winding effect.

[0044] In some embodiments, the thickness of the anti-loosening spacer sleeve 405 gradually decreases from top to bottom to form a diversion slope with an inclination direction opposite to that of the grass-blocking slope 403015, that is, the diversion slope and the grass-blocking slope 403015 are respectively located on both sides of the vertical plane. The cooperation between the diversion slope and the grass-blocking slope 403015 throws out sundries, and at the same time, the "triangle structure" formed between the diversion slope and the grass-blocking slope can also support the bent fixed cutter head to a certain extent.

[0045] In some embodiments, the obtuse angle between the grass-blocking slope and the horizontal plane ranges from 120° to 150°, preferably 135°.

[0046] In some embodiments, refer to Figure 4 and Figure 5 , the first mounting hole 403011 is a special-shaped mounting hole, and the fixing portion 403042 is a special-shaped fixing portion 403042 that matches the shape of the first mounting hole 403011.

[0047] In some embodiments, refer to Figure 6 , further includes a protective sleeve 40303. The protective sleeve 40303 is provided with a fifth mounting hole 403031 having the same shape as the special-shaped hole. The protective sleeve 40303 is provided with a protective edge 403032 along its axial direction, and the protective sleeve 40303 forms a fifth protective space that wraps the fixing portion 403042.

[0048] In some specific embodiments, refer to Figure 5 , the limiting member 40304 is a special-shaped bolt. Among them, the fixing portion 403042 is a special-shaped stud. A plane is cut along the axial direction on the side wall of the stud to form a cutting plane parallel to the axis, so that the cross-section of the stud is in a combined shape of a partial circle and a plane; correspondingly, the first mounting hole that cooperates with the stud is a circular hole, and one side of the hole wall is provided with a limiting plane that matches the cutting plane, so that the cross-section of the first mounting hole is in a combined shape of a circle and a plane. Through the plane fit between the stud and the mounting hole, the axial rotation of the bolt is effectively prevented; the connecting portion 403041 is a cylindrical boss. Of course, the limiting portion 403043 can also be cylindrical, and the cross-sectional area of the limiting portion 403043 is larger than the cross-sectional area of the connecting portion 403041, so as to cooperate with the fixed cutter head to limit the cutting knife between the two.

[0049] During use, first pass the fixing part 403042 through the fourth mounting hole and the first mounting hole in sequence, then through the protective sleeve, and then fix it with a nut. At least a part of the nut and the fixing part 403042 is wrapped in the fifth protective space inside the protective sleeve, which can prevent the limiting part and the nut from being rubbed by weeds or other foreign objects or loosening due to vibration during the high-speed rotation of the cutting knife, thus greatly improving the cutting safety.

[0050] In some embodiments, referring to Figure 2 , a second mounting hole is further provided on the cutter head assembly 403. When the fixing member 404 passes through the second mounting hole and the mounting seat 402 in sequence for fixing, the cutter head assembly 403 and the mounting seat 402 can be relatively fixed.

[0051] In some embodiments, referring to Figure 13 , the fixing member is a safety locking pin. A locking pin hole corresponding to the second mounting hole is provided on the mounting seat. The safety locking pin includes a button 40401, a limiting section 40402 and a locking and mating section 40403 arranged in sequence. A locking bead 40404 is movably arranged on the locking and mating section 40403. When the button 40401 is pressed, the locking bead 40404 retracts into the locking and mating section 40403. When the button 40401 is released, the locking bead 40404 rebounds and protrudes outside the locking and mating section 40403 to fix the cutter head assembly and the mounting seat between the limiting section 40402 and the locking bead 40404, preventing the cutter head assembly from rotating when disassembling the cutter head assembly or performing equipment maintenance, which poses a danger to maintenance and operation personnel. After the maintenance of the cutter head assembly is completed, press the button 40401 to remove the fixing member.

[0052] In some embodiments, referring to Figure 7 , the cutting knife 40302 can be made with cutting edges on both sides, that is, cutting edges 403022 are provided on both sides. When one side is worn, the cutting edge can be switched by adjusting the direction of the cutter head to maintain the cutting quality and improve the service life. It can also be made into a fold-angle type (refer to Figure 13 ) to lift the ground stalks upward by means of the wind generated by its high-speed rotation to form a relatively neat cutting stubble. Further, under good cutting conditions such as parks, courtyards, and stadiums where the ground is relatively flat and there are few ground stones and foreign objects, the cutting assembly 4 can also be switched to a flat-end straight knife or a fold-angle straight knife to meet different cutting quality requirements and improve efficiency and applicability.

[0053] In summary, for complex working conditions (such as cutting tall grass, long grass, vine grass, etc., and situations with a large amount of hard objects and sundries), the grass stalks are prone to winding around the cutting knife shaft, which may lead to the jamming of the knife shaft, the loosening of the installation bolts and nuts, and the loosening of the blades. In addition, when the cutting knife hits foreign objects such as stones, the motor shaft is prone to damage. Therefore, the present application comprehensively provides a laminated cross-protection structure and a "dynamic and static combination" cutter head structure design.

[0054] First of all, in the present application, the dynamic cutting knife in the cutter head assembly and the static fixed cutter head trigger an avoidance mechanism when cutting hard objects or vines, that is, the cutting knife can rotate relative to the fixed cutter head, so as to realize the adaptive cutting of the cutter head. At the same time, the static cutter head serves as a support base, which can ensure the stability of the overall structure and realize the movement of the cutting knife while other structures remain stationary.

[0055] Furthermore, protective treatment is carried out on the connection parts of each component. For example, a fifth protection space is set at the connection between the fixed cutter head and the cutting knife, and four protection spaces are laminated and crossed on both sides of the fixed cutter head, which can effectively protect each connection part, further improve the connection stability between the support base and the output shaft, and ensure that the two are always in a "static connection".

[0056] Furthermore, the four protection spaces on both sides of the fixed cutter head provide multi-dimensional protection for the output shaft and fasteners at different heights (for example, the lower half of the first protection space coincides with the upper half of the second protection space, and for another example, the lower half of the second protection space coincides with the upper half of the third protection space). The structure is compact, and multi-point reinforcement protection is realized on different planes (connections and reinforcements are carried out at different positions of the fixed cutter head), which can improve the strength of the fixed cutter head in different dimensions. And through the design of the grass-blocking inclined surface, even if sundries enter the second protection space or the third protection space on the outside, they can be thrown out along the grass-blocking inclined surface under the action of centrifugal force, so as to prevent the sundries from accumulating in the second protection space or the third protection space and even entering the first protection space and / or the fourth protection space to cause entanglement.

[0057] Embodiment 2 This embodiment provides a mowing platform, see Figure 1 , which includes a cutting platform 2 and at least one cutting component 4 installed at the bottom of the cutting platform 2. A grass guide ring 201 is circumferentially arranged around the cutting component 4, and the grass guide ring 201 extends towards one side of the cutting platform 2 to form a grass outlet. The grass guide ring 201 can cooperate with the functional component cutter head assembly to form a cutting air cavity, so as to comb, guide and discharge the cut materials, that is, the cut materials can be guided along the inner wall of the grass guide ring 201 to the grass outlet, so as to be discharged in a directional manner.

[0058] Among them, the cutting component 4 can refer to the cutting component 4 in Embodiment 1, which will not be elaborated here.

[0059] In some embodiments, a front protection component 5, a rear protection component 1, and side protection components 3 are respectively arranged on the front side, the rear side, and the two sides of the cutting component 4. The three protection components are mainly used to protect the surrounding environment and personnel from the possible harm caused by the sudden abnormality and potential failure of the high-speed rotating blade during operation. At the same time, to ensure the cutting effect, the front protection component 5 and the rear protection component 1 are made of soft cloth-bonded rubber plates, and the side protection components 3 are made of high-strength wear-resistant engineering plastics, which can enhance the protection while increasing the grounding area and passing performance when crossing ditches and ridges.

[0060] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0061] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. An anti-tangling cutting assembly, characterized in that, Comprising: A mounting base, a driving mechanism and a cutter head assembly; At least one convex edge is provided at the bottom of the mounting base; The driving mechanism includes a main body and a mounting portion fixed to the output end of the output shaft of the main body. The main body is mounted on the upper surface of the mounting base, and the output shaft passes through the bottom of the mounting base; The cutter head assembly is provided with a grass-blocking inclined surface having a certain inclination, so that the cutter head assembly has an open third protection space with an inner diameter gradually increasing from top to bottom. A third mounting hole is provided at the top of the third protection space, and the mounting portion is fixed in the third mounting hole. The grass-blocking inclined surface, the convex edge and the bottom of the mounting base jointly enclose a closed second protection space, and at least a part of the output shaft is located in the second protection space.

2. The cutting assembly according to claim 1, wherein, It further includes a locking member and a fastening member. The first end of the locking member is fixed to the mounting portion, and the fastening member is fixed to the second end of the locking member. The fastening member and the bottom of the output shaft cooperate to form a clamping structure for simultaneously clamping the mounting portion and the cutter head assembly to axially limit the cutter head assembly.

3. The cutting assembly according to claim 1, wherein The convex edge includes an outer convex edge and an inner convex edge sequentially arranged at the bottom of the mounting base from outside to inside, and the height of the outer convex edge is higher than the height of the inner convex edge; The inner convex edge, the bottom of the mounting base and the top of the cutter head assembly jointly form a closed first protection space; the grass-blocking inclined surface, the outer convex edge, the inner convex edge and the bottom of the mounting base enclose the second protection space.

4. The cutting assembly according to claim 2, characterized in that, It further includes a loosening prevention spacer sleeve. The top of the loosening prevention spacer sleeve is clamped between the mounting portion and the fastening member and extends downward to form an open fourth protection space inside the third protection space, and the fastening member is located in the fourth protection space.

5. The cutting assembly according to any one of claims 1-4, characterized in that, The angle range of the obtuse angle between the grass-blocking inclined surface and the horizontal plane is 120° - 150°.

6. The cutting assembly according to claim 1, wherein A second mounting hole is further provided on the cutter head assembly. When a fixing member passes through the second mounting hole and the mounting base in sequence, the cutter head assembly and the mounting base can be relatively fixed.

7. The cutting assembly according to claim 1, wherein The cutter head assembly includes a limiting member, a fixed cutter head and a cutting knife. The limiting member includes a fixed portion, a connecting portion and a limiting portion connected in sequence; A first mounting hole is provided on the fixed cutter head, and a fourth mounting hole is provided on the cutting knife. When the limiting member passes through the fourth mounting hole and the first mounting hole in sequence, the first mounting hole is sleeved outside the fixed portion, the fourth mounting hole is sleeved outside the connecting portion and is limited between the fixed cutter head and the limiting portion, and the height of the connecting portion is greater than the height of the cutting knife; when the output shaft is driven to rotate, the output shaft can drive the fixed cutter head and the cutting knife to rotate synchronously. When the cutting knife encounters an obstacle, the cutting knife can rotate relative to the fixed cutter head to achieve buffering.

8. The cutting assembly according to claim 7, wherein The first mounting hole is a special-shaped mounting hole, and the fixed portion is a special-shaped fixed portion matching the shape of the first mounting hole.

9. The cutting assembly according to claim 8, wherein It further includes a protective cover, on which a special-shaped hole identical to the shape of the first mounting hole is provided, and the protective cover forms a fifth protective space that wraps the fixing part.

10. A mowing platform, characterized in that, It includes a cutting platform and at least one cutting assembly installed at the bottom of the cutting platform. A grass guide ring is circumferentially arranged around the cutting assembly, and the grass guide ring extends towards one side of the mowing platform to form a grass outlet. The cutting assembly includes a mounting seat, a driving mechanism, and a cutter head assembly. At least one convex edge is provided at the bottom of the mounting seat. The driving mechanism includes a main body and a mounting part fixed to the output end of the output shaft of the main body. The main body is mounted on the upper surface of the mounting seat, and the output shaft passes through the bottom of the mounting seat. The cutter head assembly is provided with a grass blocking inclined surface with a certain inclination, so that the cutter head assembly has an open third protective space with an inner diameter gradually increasing from top to bottom. A third mounting hole is provided at the top of the third protective space, and the mounting part is fixed in the third mounting hole. The grass blocking inclined surface, the convex edge, and the bottom of the mounting seat jointly enclose a closed second protective space, and at least a part of the output shaft is located in the second protective space.

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