Cutting cutter head assembly of lawn mower

Abstract

The lawn mower cutter head assembly comprises an output shaft, a transmission cutter head, grass chopping blades and cutting-off blades, the output shaft is coaxially arranged on the transmission cutter head, and the grass chopping blades and the cutting-off blades are detachably connected to the transmission cutter head. The end, away from the transmission cutter disc, of the grass chopping blade is bent upwards to form a first cutting edge used for chopping grass, the end, away from the transmission cutter disc, of the cutting blade is bent downwards to form a second cutting edge used for cutting transverse weeds, and the bottom end of the second cutting edge is arranged close to the ground. The second cutting edge can be close to the ground, weeds which are attached to the surface of a lawn and grow transversely are picked off and cut, meanwhile, the grass chopping blade can further cut the picked weeds, and therefore the weeds which grow transversely on the lawn can be better removed.

Description

Technical Field

[0001] The utility model relates to the field of lawn mowers, in particular to a lawn mower cutting disc assembly. Background Art

[0002] The structure of lawn mower mainly includes the blade mechanism, power mechanism, walking mechanism, electric control mechanism and handrail mechanism. It is also often called a lawn mower, lawn mower, push mower, etc. It is mainly used for lawn mowing and beautification in park lawns, green belts, factory lawns, golf courses, gardens, orchards and other places. Because it can replace or reduce manpower and is easy to operate, it is widely used in the field of garden tools. At present, the mainstream lawn mower in the market is gasoline lawn mower, that is, the whole machine mainly uses gasoline as energy.

[0003] The utility model patent with announcement number CN202022286455.8 discloses a cutter disc mechanism for an electric lawn mower, including an output shaft, a transmission cutter disc, a locking nut, a blade and an anti-loosening cutter disc.

[0004] The above-mentioned related technical solutions have the following defects: the above-mentioned blade mechanism can cut the weeds growing vertically on the lawn, but there are still some weeds growing horizontally on the ground in the lawn, and the above-mentioned blade mechanism is difficult to remove these weeds. Utility Model Content

[0005] In order to better remove weeds growing on a lawn, the present application provides a lawn mower cutting disc assembly.

[0006] The present application provides a lawn mower cutting disc assembly adopting the following technical solution:

[0007] A lawn mower cutting disc assembly comprises an output shaft, a transmission disc, a grass chopping blade and a cutting blade, wherein the output shaft is coaxially arranged on the transmission disc, and the grass chopping blade and the cutting blade are both detachably connected to the transmission disc, the end of the grass chopping blade away from the transmission disc is bent upward to form a first cutting edge for chopping grass, and the end of the cutting blade away from the transmission disc is bent downward to form a second cutting edge for cutting weeds, and the bottom end of the second cutting edge is arranged close to the ground.

[0008] By adopting the above technical solution, the second cutting edge can be close to the ground to pick up and cut the weeds growing on the lawn surface, and the grass-chopping blade can further chop the picked up weeds, thereby better removing the weeds growing on the lawn.

[0009] Preferably, there are two grass chopping blades and two cutting blades respectively, and the two grass chopping blades and the two cutting blades are evenly distributed on the transmission cutter disc along the circumferential direction, and the grass chopping blades and the cutting blades are spaced apart from each other along the circumferential direction of the transmission cutter disc.

[0010] By adopting the above technical solution, such an arrangement can make the grass-chopping blade and the cutting blade be used in a better coordinated manner, thereby improving the efficiency of mowing and chopping grass.

[0011] Preferably, the blade body of the cutting blade is recessed downward to form two recessed portions, and the length direction of the recessed portions is parallel to the length direction of the blade body of the cutting blade.

[0012] By adopting the above technical solution, the recessed portion can play a role in strengthening the cutting blade, just like a straight cutting blade is bent after force is applied to it, but if you want to bend the cutting blade with the recessed portion again, you need to spend more effort than before.

[0013] Preferably, the grass chopping blade and the cutting blade are fixed to the transmission cutter disc by the cooperation of bolts and nuts, the screw rod part of the bolt is provided with a notch, the transmission cutter disc is provided with four first through holes for the screw rod parts of the bolt to pass through, the ends of the grass chopping blade and the cutting blade close to the transmission cutter disc are provided with second through holes for the screw rod parts of the bolt to pass through, the screw rod parts of the bolts pass through the corresponding second through holes and the corresponding first through holes and are threadedly connected to the nut; the grass chopping blade and the cutting blade are both located below the transmission cutter disc after installation.

[0014] Preferably, the drive cutter disc is provided with two support assemblies, which are respectively arranged at both ends of the drive cutter disc. The support assemblies are used to support the drive cutter disc when installing the grass cutting blade or the cutting blade, so that the gap required for installation is formed between the drive cutter disc and the ground.

[0015] By adopting the above technical solution, when the operator installs the grass cutting blade and the cutting blade, there is no need to lift the transmission cutter disc together, which can facilitate the operator to install the grass cutting blade and the cutting blade.

[0016] Preferably, the support assembly comprises a support block, a spring, a stud, a base block and a sliding ring, the base block is fixedly arranged on the top surface of the transmission cutter disc, a thread groove matching the stud is provided on the base block, a screw rod portion of the stud is threadedly connected in the thread groove, the support block is fixedly arranged at the bottom end of the stud, and a receiving groove matching the support block is provided on the bottom surface of the transmission cutter disc;

[0017] An annular groove is provided on the base block, and the sliding ring slides in the annular groove along the axial direction of the stud. The two ends of the spring are respectively arranged on the bottom wall of the annular groove and the sliding ring. The spring is used to drive the sliding ring to always abut against the end part of the stud, and the support block is used to abut against the ground to support the transmission cutter disc.

[0018] By adopting the above technical solution, the stud is rotated to control the lifting and lowering of the stud. When the stud descends, the support block extends out of the receiving slot for support. When the stud rises, the support block is retracted into the receiving slot, and the use of the grass cutting blade and the cutting blade is not affected.

[0019] Preferably, the end portion of the stud can be moved downward to abut against the base block, and when the end portions of the two studs abut against the two base blocks respectively, the support block extends out of the receiving groove and is in a supporting state, and the two support blocks are located at the same height position.

[0020] The technical effects of this utility model are mainly reflected in the following aspects:

[0021] 1. The utility model is provided with a cutting blade, and the second cutting edge of the cutting blade can be close to the ground to pick and cut the weeds growing on the lawn surface, and at the same time, the grass-chopping blade can further chop the picked weeds, so as to better remove the weeds growing on the lawn;

[0022] 2. The utility model provides a support assembly so that when the operator installs the grass-chopping blade and the cutting blade, there is no need to lift the transmission cutter disc together, which makes it convenient for the operator to install the grass-chopping blade and the cutting blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the cutting disc assembly installed on a lawn mower in an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the overall structure of the cutting disc assembly of the embodiment of the present application.

[0025] Figure 3 yes Figure 2 Sectional view along line AA.

[0026] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0027] Explanation of the accompanying drawings: 1. output shaft; 2. transmission cutter disc; 21. grass cutting blade; 211. first cutting edge; 22. cutting blade; 221. second cutting edge; 222. recessed portion; 23. receiving groove; 31. bolt; 311. notch; 32. nut; 4. support assembly; 41. support block; 42. spring; 43. stud; 44. base block; 441. threaded groove; 442. annular groove; 45. sliding ring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0029] The embodiment of the present application discloses a lawn mower cutting disc assembly.

[0030] Reference Figure 1 and Figure 2 A lawn mower cutting disc assembly of this embodiment includes an output shaft 1, a drive disc 2, a grass-chopping blade 21 and a cutting blade 22. The output shaft 1 is coaxially fixedly mounted on the drive disc 2. The grass-chopping blade 21 and the cutting blade 22 can be detachably connected to the drive disc 2. The end of the grass-chopping blade 21 away from the drive disc 2 is bent upward to form a first cutting edge 211 for chopping grass. The end of the cutting blade 22 away from the drive disc 2 is bent downward to form a second cutting edge 221 for cutting weeds. The bottom end of the second cutting edge 221 is arranged close to the ground.

[0031] Reference Figure 1 and Figure 2 The second cutting edge 221 can be close to the ground to pick up and cut the weeds growing on the lawn surface. At the same time, the grass-chopping blade 21 can further chop these picked up weeds, thereby better removing the weeds growing on the lawn.

[0032] Reference Figure 1 and Figure 2 There are two grass chopping blades 21 and two cutting blades 22, respectively. The two grass chopping blades 21 and the two cutting blades 22 are evenly distributed on the driving blade disc 2 along the circumferential direction. The grass chopping blades 21 and the cutting blades 22 are arranged at intervals from each other along the circumferential direction of the driving blade disc 2. Such an arrangement enables the grass chopping blades 21 and the cutting blades 22 to be used in a better manner, thereby improving the efficiency of mowing and chopping grass.

[0033] Reference Figure 1 and Figure 2 The blade of the cutting blade 22 is concave downward to form two concave parts 222, and the length direction of the concave parts 222 is parallel to the length direction of the blade of the cutting blade 22. The concave parts 222 can play a role in strengthening the strength of the cutting blade 22, just like a straight cutting blade 22 is bent after applying force to it, but if you want to bend the cutting blade 22 with the concave parts 222, you need to spend more force than before.

[0034] Reference Figure 1 and Figure 2The grass-chopping blade 21 and the cutting blade 22 are fixed to the driving cutter disc 2 by the cooperation of the bolt 31 and the nut 32. The screw part of the bolt 31 is provided with a notch 311. The notch 311 makes the cross section of the screw part of the bolt 31 arched. The driving cutter disc 2 is provided with four first through holes for the screw part of the bolt 31 to pass through. The ends of the grass-chopping blade 21 and the cutting blade 22 near the driving cutter disc 2 are provided with second through holes for the screw part of the bolt 31 to pass through. The screw part of the bolt 31 passes through the corresponding second through holes and the corresponding first through holes and is threadedly connected to the nut 32. The grass-chopping blade 21 and the cutting blade 22 are both located below the driving cutter disc 2 after installation. The notch 311 on the bolt 31 can limit the rotation of the bolt 31, and the operator can tighten the nut 32 with an electric wrench. Gaskets can be set between the bolt 31 and the driving cutter disc 2 and between the nut 32 and the driving cutter disc 2 to increase the contact area and prevent the bolt 31 and the nut 32 from loosening.

[0035] Reference Figure 2-Figure 4 The drive cutter disc 2 is provided with two support components 4, which are respectively arranged at both ends of the drive cutter disc 2. The support components 4 are used to support the drive cutter disc 2 when installing the grass cutting blade 21 or the cutting blade 22, so that a gap required for installation is formed between the drive cutter disc 2 and the ground. When the operator installs the grass cutting blade 21 and the cutting blade 22, there is no need to lift the drive cutter disc 2 together, which can facilitate the operator to install the grass cutting blade 21 and the cutting blade 22.

[0036] Reference Figure 2-Figure 4 The support assembly 4 includes a support block 41, a spring 42, a stud 43, a base block 44 and a sliding ring 45. The base block 44 is fixedly arranged on the top surface of the transmission cutter disc 2. A threaded groove 441 matching the stud 43 is opened on the base block 44. The screw rod part of the stud 43 is threadedly connected in the threaded groove 441. The support block 41 is fixedly arranged at the bottom end of the stud 43. A receiving groove 23 matching the support block 41 is opened on the bottom surface of the transmission cutter disc 2.

[0037] Reference Figure 2-Figure 4 An annular groove 442 is provided on the base block 44, and the sliding ring 45 slides in the annular groove 442 along the axial direction of the stud 43. The two ends of the spring 42 are respectively arranged on the bottom wall of the annular groove 442 and the sliding ring 45. The spring 42 is used to drive the sliding ring 45 to always abut against the end part of the stud 43, and the support block 41 is used to abut against the ground to support the transmission cutter disc 2.

[0038] Reference Figure 2-Figure 4 The operator uses an electric wrench to rotate the stud 43 to control the lifting and lowering of the stud 43. When the stud 43 descends, the support block 41 extends out of the receiving groove 23 for support. When the stud 43 rises, the support block 41 is retracted into the receiving groove 23, which does not affect the use of the grass cutting blade 21 and the cutting blade 22.

[0039] Reference Figure 2-Figure 4 The end of the stud 43 can move down to abut against the base block 44. When the end of the two studs 43 abut against the two base blocks 44, the support block 41 extends out of the receiving groove 23 and is in a supporting state. The two support blocks 41 are located at the same height. When placed on a horizontal ground, the transmission cutter disc 2 can be kept stable.

[0040] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A lawn mower cutting disc assembly, characterized in that: The invention comprises an output shaft (1), a transmission blade (2), a grass-chopping blade (21) and a cutting blade (22), wherein the output shaft (1) is coaxially arranged on the transmission blade (2), the grass-chopping blade (21) and the cutting blade (22) are both detachably connected to the transmission blade (2), the end of the grass-chopping blade (21) away from the transmission blade (2) is bent upward to form a first cutting edge (211) for chopping grass, and the end of the cutting blade (22) away from the transmission blade (2) is bent downward to form a second cutting edge (221) for cutting weeds, and the bottom end of the second cutting edge (221) is arranged close to the ground.

2. A lawn mower cutting disc assembly according to claim 1, characterized in that: There are two grass chopping blades (21) and two cutting blades (22), respectively. The two grass chopping blades (21) and the two cutting blades (22) are evenly distributed on the transmission cutter disc (2) along the circumferential direction. The grass chopping blades (21) and the cutting blades (22) are arranged at intervals from each other along the circumferential direction of the transmission cutter disc (2).

3. The lawn mower cutting disc assembly according to claim 1, characterized in that: The blade body of the cutting blade (22) is recessed downward to form two recessed portions (222), and the length direction of the recessed portions (222) is parallel to the length direction of the blade body of the cutting blade (22).

4. The lawn mower cutting disc assembly according to claim 2, characterized in that: The grass chopping blade (21) and the cutting blade (22) are both fixed to the driving blade disc (2) by the cooperation of a bolt (31) and a nut (32); a notch (311) is provided on the screw rod portion of the bolt (31); four first through holes are provided on the driving blade disc (2) for the screw rod portion of the bolt (31) to pass through; second through holes are provided at the ends of the grass chopping blade (21) and the cutting blade (22) close to the driving blade disc (2) for the screw rod portion of the bolt (31) to pass through; the screw rod portion of the bolt (31) passes through the corresponding second through holes and the corresponding first through holes and is then threadedly connected to the nut (32); after being installed, the grass chopping blade (21) and the cutting blade (22) are both located below the driving blade disc (2).

5. The lawn mower cutting disc assembly according to claim 1, characterized in that: The transmission cutter disc (2) is provided with two support assemblies (4), which are respectively arranged at two ends of the transmission cutter disc (2). The support assemblies (4) are used to support the transmission cutter disc (2) when installing a grass cutting blade (21) or a cutting blade (22), so that a gap required for installation is formed between the transmission cutter disc (2) and the ground.

6. A lawn mower cutting disc assembly according to claim 5, characterized in that: The support assembly (4) comprises a support block (41), a spring (42), a stud (43), a base block (44) and a sliding ring (45); the base block (44) is fixedly arranged on the top surface of the transmission cutter disc (2); a threaded groove (441) matching the stud (43) is provided on the base block (44); a screw rod portion of the stud (43) is threadedly connected in the threaded groove (441); the support block (41) is fixedly arranged at the bottom end of the stud (43); and a receiving groove (23) matching the support block (41) is provided on the bottom surface of the transmission cutter disc (2); The base block (44) is provided with an annular groove (442), and the sliding ring (45) slides in the annular groove (442) along the axial direction of the stud (43). The two ends of the spring (42) are respectively arranged on the bottom wall of the annular groove (442) and the sliding ring (45). The spring (42) is used to drive the sliding ring (45) to always abut against the end portion of the stud (43). The support block (41) is used to abut against the ground to support the transmission cutter disc (2).

7. A lawn mower cutting disc assembly according to claim 6, characterized in that: The end portion of the stud (43) can be moved downward to abut against the base block (44). When the end portions of the two studs (43) abut against the two base blocks (44) respectively, the support block (41) extends out of the receiving groove (23) and is in a supporting state. The two support blocks (41) are located at the same height position.

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