Blade head assembly and lawn mower

Abstract

The utility model discloses a tool bit assembly and mower relates to the technology field of mowing, including tool rest, blade and installation component, installation component includes flail screw and flail nut, be provided with first connecting hole on the blade, be provided with second connecting hole on the tool rest, and the screw rod portion of flail screw is after passing first connecting hole and second connecting hole, and is connected with flail nut and is screwed, and the blade is connected on the tool rest through the nut portion of flail screw and flail nut together, still include the protection cover of preventing mowing, and the protection cover of preventing mowing constitutes the outside resistance of flail nut, when the tool rest is driven to rotate and thereby drives the blade to mow, the protection cover of preventing mowing can resist the grass, reduce the grass direct beating flail nut, and flail nut is protected and is not easy to loosen, can effectively prevent the blade from falling or flying out.

Description

Technical Field

[0001] This utility model relates to the field of lawn mowing technology, and in particular to a blade assembly and a lawn mower. Background Technology

[0002] In existing literature, Chinese utility model publication CN219182109U discloses "a remote-controlled tracked lawnmower." The output end of the engine is fixedly connected to the middle of the mowing mechanism. The mowing mechanism includes a blade holder and two blades. The blade holder is a long, narrow metal plate integrally formed by a horizontal section in the middle and inclined sections on both sides. The center of the blade holder is fixedly connected to the output end of the engine, and the two blades are fixed symmetrically at both ends of the blade holder. The output shaft of the engine drives the blade holder to rotate horizontally, causing the two blades to rotate at high speed around the output shaft of the engine to achieve the mowing operation.

[0003] The blade is fixed to the tool holder by passing a screw through the corresponding connecting hole on the blade and the tool holder, and then connecting the screw and nut to fix the blade to the tool holder.

[0004] The drive shaft and blade holder can be considered as a single unit with the same rotation direction. During rotary cutting, the nut is subject to friction from the grass. When the rotating part of the blade assembly—the nut—is constantly rubbed by the grass, it may loosen. If the nut falls off, the blade may fall or fly out, which is quite dangerous. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution to address the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cutter head assembly, including a cutter holder, a blade, and a mounting assembly;

[0007] The mounting components include a swivel screw and a swivel nut;

[0008] The blade has a first connecting hole, and the tool holder has a second connecting hole. The screw of the swivel screw passes through the first and second connecting holes and is screwed into the swivel nut. The blade is connected to the tool holder by the nut of the swivel screw and the swivel nut.

[0009] It also includes a grass-blocking protective cover, which forms a barrier against the outside of the swivel nut.

[0010] A further technical solution of this utility model: a connecting block is connected to the anti-grass-cutting protective cover, and a third connecting hole is provided on the connecting block;

[0011] The screw portion of the swivel screw passes through the first connecting hole, the second connecting hole, and the third connecting hole, and is then screwed into the swivel nut; the anti-weed protection cover is installed on the outside of the swivel nut.

[0012] A further technical solution of this utility model: the anti-weed protection cover has a proximal end close to the nut and a distal end away from the nut;

[0013] The outer side of the anti-grass-cutting protective cover is inclined from the near end to the far end, and is inclined inward towards the axis of the screw part or towards the extension line of the axis of the screw part.

[0014] A further technical solution of this utility model: the nut of the sling is screwed onto the screw rod and located inside the anti-grass-cutting protective cover.

[0015] A further technical solution of this utility model: the cross-section of the screw part is non-circular, the shape of the third connecting hole corresponds to the shape of the screw part, and the shape of the second connecting hole corresponds to the shape of the screw part.

[0016] A further technical solution of this utility model: the mounting component also includes an elastic pad, which is disposed between the connecting block and the swivel nut.

[0017] A further technical solution of this utility model: the mounting assembly also includes a blade washer, which has a fourth connecting hole corresponding to the screw part, and the blade washer is located between the blade holder and the blade.

[0018] A further technical solution of this utility model: the nut part of the swivel screw is located at the bottom, and the swivel nut is located at the top.

[0019] A further technical solution of this utility model: the anti-weed protection cover is set on the blade holder and close to the nut of the swivel blade, or set on the blade and close to the nut of the swivel blade.

[0020] This utility model provides the following technical solution: a lawnmower, including the blade assembly described above.

[0021] Compared with the existing technology, the beneficial effects of this technical solution are: when the blade holder is driven to rotate and thus drive the blade to cut grass, the anti-grass protection cover can block the grass and reduce the grass from directly hitting the blade nut. After the blade nut is protected, it is not easy to loosen, which can effectively prevent the blade from falling or flying out.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the bottom structure of the lawnmower of this utility model;

[0025] Figure 2 This is a schematic diagram of the cutter head assembly of this utility model;

[0026] Figure 3 This is an exploded view of the cutter head assembly of this utility model;

[0027] The corresponding labels in the attached diagram are explained as follows:

[0028] Tool holder-1, second connecting hole-101,

[0029] Blade-2, First connecting hole-201,

[0030] Spin screw-3, screw part-301, nut part-302.

[0031] 4-4 swivel nut

[0032] Anti-grass-cutting protective cover-5, connecting block-501, third connecting hole-502.

[0033] Elastic Pad-6

[0034] Blade washer pad-7, fourth connecting hole-701,

[0035] Lawnmower-10

[0036] Driver Component-20. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figure 1-3 A cutter head assembly includes a cutter holder 1, a blade 2, and a mounting assembly. The mounting assembly includes a cutter screw 3 and a cutter nut 4.

[0039] The blade 2 is provided with a first connecting hole 201, and the tool holder 1 is provided with a second connecting hole 101. After the screw part 301 of the swivel screw passes through the first connecting hole 201 and the second connecting hole 101, it is screwed into the swivel nut 4. The blade 2 is connected to the tool holder 1 by the nut part 302 of the swivel screw and the swivel nut 4.

[0040] The blade assembly also includes a grass-blocking protective cover 5, which forms a barrier against the outside of the blade nut 4.

[0041] When the blade holder 1 is driven to rotate, thereby driving the blade 2 to cut grass, the grass-blocking protective cover 5 can block the grass and reduce the grass directly hitting the blade nut 4. After being protected, the blade nut 4 is not easy to loosen, which can effectively prevent the blade 2 from falling or flying out.

[0042] In some embodiments, the anti-weed protection cover may be installed on the blade holder or on the blade.

[0043] For example, if the screw of the sling screw passes through the first connecting hole and the second connecting hole in sequence and is then screwed into the sling nut, the anti-grass-hitting protective cover can be set on the blade holder closer to the sling nut. The anti-grass-hitting protective cover is connected to the blade holder and forms a barrier against the outside of the sling nut.

[0044] For example, if the screw of the slinger passes through the second connecting hole and the first connecting hole in sequence and is then screwed into the slinger nut, the anti-grass-hitting protective cover can be set on the blade closer to the slinger nut. The anti-grass-hitting protective cover is connected to the blade and forms a barrier against the outside of the slinger nut.

[0045] In some embodiments, a connecting block 501 is connected to the anti-grass-hitting protective cover 5, and a third connecting hole 502 is provided on the connecting block 501.

[0046] After the screw portion 301 of the sling screw passes through the first connecting hole 201, the second connecting hole 101 and the third connecting hole 502, it is screwed into the sling nut 4, and the anti-grass-cutting protective cover 5 is formed to cover the outside of the sling nut 4.

[0047] Thus, the weed protection cover 5 can be installed simultaneously with the blade installation; and the weed protection cover 5 can be removed simultaneously with the blade removal, making the weed protection cover 5 a detachable component. Users can perform disassembly and maintenance, disassembly and cleaning, and replacement of different models of weed protection covers as needed; moreover, the connecting block 501 on the weed protection cover can also form a washer structure when the installation components are screwed together, making the screw connection less likely to loosen.

[0048] In some embodiments, the anti-grass cover 5 has a proximal end near the nut portion and a distal end away from the nut portion.

[0049] like Figure 2 , 3 As shown, the outer side of the anti-grass-hitting protective cover 5 is inclined from the near end to the far end, and is inclined inward towards the axis of the screw part 301 or towards the extension line of the axis of the screw part 301.

[0050] In this embodiment, by setting the grass inward at an angle, the grass is guided by the outer side of the grass-proof protective cover 5, thereby effectively reducing the impact on the grass-proof protective cover 5.

[0051] In some embodiments, the sling nut 4 is screwed onto the screw portion 301 and located inside the anti-grass-cutting protective cover 5.

[0052] For example, the nut 4 can be inserted into the protective cover 5 from the far end of the protective cover. The far end of the protective cover is wider than the nut 4 so that the installation tool (such as a socket) can hold the nut 4 in place, allowing for better screw tightening.

[0053] In some embodiments, the cross-section of the screw portion 301 is non-circular, for example... Figure 3 The diagram shows a flat position setting.

[0054] The shape of the third connecting hole 502 corresponds to that of the screw portion 301. After the screw portion 301 passes through the third connecting hole 502, the non-circular arrangement restricts the connecting block 501 to rotate along the circumference of the screw portion 301.

[0055] In this way, when the anti-grass protection cover 5 blocks the grass, the anti-grass protection cover 5 itself will not rotate on the screw part 301, so as to avoid the situation where the anti-grass protection cover 5 rotates and causes the knife nut 4 to loosen.

[0056] In some embodiments, the shape of the second connecting hole 101 corresponds to that of the screw portion 301. After the screw portion 301 passes through the second connecting hole 101, it is configured to be non-circular, so that the screw portion 301 is restricted to not rotating circumferentially on the tool holder 1.

[0057] Thus, when the anti-grass protection cover 5 blocks the grass, the screw part 301 itself will not rotate on the blade holder 1. Combined with the above-mentioned third connecting hole 502, the anti-grass protection cover 5 will not rotate relative to the blade holder 1 when it blocks the grass. Even if the nut part 302 of the swivel screw is hit by grass, the swivel screw 3 itself will not rotate and become loose due to the above-mentioned limiting setting, so as to better prevent rotation and loosening.

[0058] In some embodiments, the mounting assembly further includes a resilient pad 6 disposed between the connecting block 501 and the swivel nut 3. The resilient pad 6 has a through hole, for example, the resilient pad 6 is a spring washer.

[0059] After the screw part 301 passes through the third connecting hole 502 and the through hole of the elastic pad 6 in sequence, it is screwed to the sling nut 4.

[0060] In some embodiments, the mounting assembly further includes a blade washer 7, which has a fourth connecting hole 701 corresponding to the screw portion 301, and the blade washer 7 is located between the blade holder 1 and the blade 2.

[0061] In some embodiments, the shape of the fourth connecting hole 701 corresponds to that of the screw portion 301.

[0062] In some embodiments, the nut portion 302 of the swivel screw is located at the bottom, and the swivel nut 4 is located at the top.

[0063] For example, the screw part 301 passes through the first connecting hole 201, the fourth connecting hole 701, the second connecting hole 101, the third connecting hole 502, and the through hole of the elastic pad 6 in sequence, and then is screwed to the swivel nut 4.

[0064] In this embodiment, a lawnmower is also proposed, which uses the blade assembly of any of the above embodiments. The lawnmower 10 is also provided with a drive assembly 20, which is used to drive the blade holder 1 to rotate, thereby driving the blade 2 to perform the mowing operation.

[0065] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A cutter head assembly, characterized in that, Includes the tool holder, blade, and mounting components; The mounting components include a swivel screw and a swivel nut; The blade has a first connecting hole, and the tool holder has a second connecting hole. The screw of the swivel screw passes through the first and second connecting holes and is screwed into the swivel nut. The blade is connected to the tool holder by the nut of the swivel screw and the swivel nut. It also includes a grass-blocking protective cover, which forms a barrier against the outside of the swivel nut.

2. The cutter head assembly according to claim 1, characterized in that, The anti-grass-cutting protective cover is connected to a connecting block, and the connecting block is provided with a third connecting hole; The screw portion of the swivel screw passes through the first connecting hole, the second connecting hole, and the third connecting hole, and is then screwed into the swivel nut; the anti-weed protection cover is installed on the outside of the swivel nut.

3. The cutter head assembly according to claim 2, characterized in that, The anti-grass-cutting protective cover has a proximal end near the nut and a distal end away from the nut; The outer side of the anti-grass-cutting protective cover is inclined from the near end to the far end, and is inclined inward towards the axis of the screw part or towards the extension line of the axis of the screw part.

4. The cutter head assembly according to claim 2, characterized in that, The nut for the sling cutter is screwed onto the screw rod and located inside the anti-weed protection cover.

5. The cutter head assembly according to claim 2, characterized in that, The cross-section of the screw section is non-circular, the shape of the third connecting hole corresponds to the shape of the screw section, and the shape of the second connecting hole corresponds to the shape of the screw section.

6. The cutter head assembly according to claim 2, characterized in that, The mounting components also include a spring pad, which is positioned between the connecting block and the swivel nut.

7. The cutter head assembly according to claim 1, characterized in that, The mounting assembly also includes a blade washer, which has a fourth connection hole corresponding to the screw section and is located between the blade holder and the blade.

8. The cutter head assembly according to claim 1, characterized in that, The nut of the swivel screw is located at the bottom, and the swivel nut is located at the top.

9. The cutter head assembly according to claim 1, characterized in that, The anti-weed protection cover is installed on the blade holder and near the nut of the swivel blade, or on the blade and near the nut of the swivel blade.

10. A lawnmower, characterized in that, Includes the cutter head assembly as described in any one of claims 1-9.

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