TWM550532U - Blade for grass mower - Google Patents

Description

Tool for lawn mower

This creation is about lawn mowers, especially one that is used in lawn mowers.

The conventional lawn mower cutter has a long plate shape, and has a connecting hole at the center position which can be connected with the mower head of the lawn mower, and a blade is arranged on the edge adjacent to the edge of the cutter and facing the plant, and the grass is cut through the grass. The mower head of the machine is driven to rotate the tool along the center of rotation to achieve the purpose of mowing.

However, in general, weeding is not only weeds, but also many stones or hard objects. Therefore, when the aforementioned tool is running at high speed, the cutting edge of the tool will collide with the ground in addition to cutting the weeds. Stone, at this time, because the tool itself does not have a better cushioning structure, the great impact force will be borne by the tool and the impacted stone, so that the tool is easily damaged and the service life is greatly reduced. More seriously, the broken tool Fragments or impacted stones may also hit the user or other nearby people with their impact, which may lead to more serious safety problems.

The main purpose of this creation is to provide a cutter for a lawn mower that can effectively reduce the wind resistance and cushion the impact force, thereby improving the stability, service life and safety of the tool.

In order to achieve the above object, the lawn mower of the present invention has a operating lever, a lawn mower head and a driving unit, and the lawn mower head and the driving unit are respectively mounted on the two ends of the operating rod. The cutter is connected to the lawn mower head and rotates with a rotation center of the lawn mower head. The cutter comprises a body and two main blades. The main blades are oppositely arranged to each other and respectively connected to opposite sides of the body, and the main blades are respectively The utility model has a curved arc blade and a concave arc blade, the curved arc blade facing the plant to be cut, and the concave arc blade back is located on the opposite side of the curved arc blade.

It can be seen from the above that when the tool of the present invention is rotated at a high speed, the structure of the curved arc blade and the concave arc back can effectively reduce the air resistance to improve the stability of the tool, and when the tool hits the stone, the curved bend The arc blade and the concave arc back can effectively reduce the impact of each other to increase the safety of use and extend the life of the tool.

In the embodiment of the present invention, a first starting point and a first ending point are provided at both ends of the curved blade of the main blade, and a second starting point and a second ending point are provided at both ends of the concave blade of the main blade. The length from the point to the first end point is shorter than the length from the second start point to the second end point.

In an embodiment of the present invention, the tool further includes at least one pair of blades, one end of which is coupled to the body and adjacent to the center of rotation, and the other end protrudes from the body. In order to avoid the plant winding the lawn mower head, the tool does not run smoothly.

In an embodiment of the present invention, the secondary blade wing is on the same side as the primary blade.

In an embodiment of the present invention, the body has a connecting hole that is coaxial with the center of rotation of the mower head and that is coupled to the lawn mower head.

In an embodiment of the present invention, each of the main blades is extended outwardly from the body by a wide and narrow width.

In an embodiment of the present invention, the width of the body is greater than the width of each of the main blades.

The detailed construction, features, assembly or use of the rim provided by this creation will be described in the detailed description of the subsequent embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific embodiments of the present invention are merely used to illustrate the present invention and are not intended to limit the scope of the patent application.

Referring first to FIG. 1 and FIG. 2, the cutter 10 for a lawn mower according to the first embodiment of the present invention includes a body 20 and two main blades 30.

The body 20 has a connecting hole 21 coaxial with the center of rotation C of the lawn mower head (not shown) and is assembled with the lawn mower head.

Each of the main blades 30 is disposed opposite to each other and is respectively connected to opposite sides of the body 20. In detail, each of the main blades 30 extends outwardly from the body 20 from a wide and narrow width, and the width of the body 20 is greater than each of the main blades. The width of the wing 30, each of the main blades 30 has a curved blade 31 and a concave blade back 33. The two ends of the curved blade 31 of the main blade 30 are defined as a first starting point 311 and a first ending point 313, respectively. Both ends of the concave arc back 33 of the wing 30 are provided with a second starting point 331 and a second ending point 333. The length of the first starting point 311 to the first ending point 313 is shorter than the length of the second starting point 331 to the second ending point 333, and the arc is curved. The blade 31 faces the plant to be cut, and the concave arc blade back 33 is located on the opposite side of the curved blade 31.

Thereby, the main blades 30 of the tool 10 of the present invention are wider in a portion close to the body 20, and the main blades 30 are narrower in a portion away from the body 20, thereby forming a main blade 30 structure having an inner width and a narrow outer circumference. Therefore, when the tool 10 of the present invention is rotated at a high speed, the structure of the curved blade 31 and the concave blade back 33 can effectively reduce the air resistance to improve the stability of the tool, and when the tool hits the stone, the curved bend The arc blade and the concave arc back can effectively reduce the impact of each other to increase the safety of use and extend the life of the tool.

Referring to FIGS. 3 to 5 again, the cutter 10' for the lawn mower according to the second embodiment of the present invention further includes two blades 40, and each of the blades 40 is located on the same side as each of the main blades 30. And one end of each sub-blade 40 is respectively connected to the body 20 and adjacent to the rotation center C, and the other ends of the sub-blades 40 respectively protrude from the body 20, and as seen from FIG. 5, each sub-blade 40 It protrudes from the body 20 in the opposite direction to the ground (not shown), thereby cutting off plants (such as long grass or vines) near the center of rotation C to avoid the plant wrapping the parts near the mower head or the mower head. In turn, the smoothness of the operation of the tool 10' is improved.

10, 10'‧‧‧Tools
20‧‧‧ body
21‧‧‧Connection hole
30‧‧‧Main Blade
31‧‧‧ curved arc blade
The first starting point of 311‧‧
313‧‧‧ first end
33‧‧‧ concave arc back
331‧‧‧ second starting point
333‧‧‧second end
40‧‧‧Sub blade
C‧‧‧ Rotation Center

Fig. 1 is a perspective view showing a cutter for a lawn mower according to a first embodiment of the present invention. Fig. 2 is a plan view showing the cutter for the lawn mower according to the first embodiment of the present invention, mainly showing the relative positions of the curved blade and the concave blade. Fig. 3 is a perspective view showing a cutter for a lawn mower according to a second embodiment of the present invention. Fig. 4 is a plan view of the cutter for the lawn mower according to the second embodiment of the present invention, mainly showing the relative positions of the main blade and the secondary blade. Fig. 5 is a side view of the cutter for the lawn mower according to the second embodiment of the present invention.

10‧‧‧Tools

20‧‧‧ body

21‧‧‧Connection hole

30‧‧‧Main Blade

31‧‧‧ curved arc blade

33‧‧‧ concave arc back

C‧‧‧ Rotation Center

Claims (7)

A cutter for a lawn mower, the lawn mower having an operating rod, a lawn mower head and a driving unit, the lawn mower head and the driving unit are respectively mounted on the two ends of the operating rod, the cutter connection In the lawn mower head, and rotating at a center of rotation of the lawn mower head, the tool comprises: a body; and two main blades disposed opposite to each other and respectively connected to opposite sides of the body, each of the The main blades each have a curved cutting edge and a concave arc back facing the plant to be cut, the concave arc back being located on the opposite side of the curved cutting edge. The tool for a lawn mower according to claim 1, wherein both ends of the curved blade of the main blade are provided with a first starting point and a first ending point, and the ends of the concave blade of the main blade are provided with a first end The second starting point and the second ending point, the length of the first starting point to the first ending point being shorter than the length of the second starting point to the second ending point. The tool for a lawn mower according to claim 1, wherein the tool further comprises at least one pair of blades, the pair of blades being connected at one end to the body and adjacent to the center of rotation, and the other end protruding from the body. A tool for a lawn mower according to claim 3, wherein the secondary blade is on the same side as the primary blade. The tool for a lawn mower according to claim 1, wherein the body has a connecting hole coaxial with a center of rotation of the lawn mower head and assembled with the lawn mower head. A tool for a lawn mower according to claim 1, wherein each of the main blades is extended outwardly from the body by a wide and narrow width. A tool for a lawn mower according to claim 1, wherein the width of the body is greater than the width of each of the main blades.