TW201714517A - Blade for mower capable of preventing a drive shaft mounted with a blade from being twisted by plants and ensuring the smoothness of the blade during rotation - Google Patents

Abstract

A blade for a mower is disclosed, which can be driven by a drive shaft to rotate about a rotational center. The blade comprises at least one cutting portion and a mounting portion connected with the cutting portion. The mounting portion comprises a base wall connected with the cutting portion and at least one auxiliary cutting wall that is protruded relative to the base wall and disposed adjacent to the rotational center. With the auxiliary cutting wall disposed adjacent to the rotational center and protruded relative to the base wall, plants close to the rotational center can be cut when the blade is rotated, so as to prevent the drive shaft mounted with the blade from being twisted by the plants and ensure the smoothness of the blade during rotation.

Description

Lawn blade

The present invention relates to a blade, and more particularly to a blade mounted on a lawn mower.

Referring to Figure 1, there is a blade 1 mountable on a lawn mower adjacent to the ground, the blade 1 being mounted on a drive shaft (not shown) of the lawn mower and rotatable about a center of rotation for performing Mowing, which comprises a mounting portion 11 located at the center and coupled to the drive shaft, and two cutting portions 12 extending from the mounting portion 11 to the opposite sides in the longitudinal direction, each cutting portion 12 having a cutting edge adjacent to the edge 121. When the drive shaft drives the blade 1 to rotate along the center of rotation, the blades 121 can cut the plants and achieve the purpose of mowing.

In general, where weeding is required, in addition to weeds, a wide variety of plants are usually grown. For example, vine plants are usually attached to the weeds in order to gain sunlight. When the conventional blade 1 is rotated by the drive shaft, although the blades 121 can cut weeds, during the mowing process, the vine plants are easily entangled on the drive shaft, which not only causes trouble in cleaning, In severe cases, vine plants may also wrap around the drive shaft and cause the drive shaft to fail to drive the blade 1 to rotate.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blade for a lawn mower that can cut plants adjacent to the drive shaft to ensure smooth rotation.

The blade of the present invention can be driven by a drive shaft and rotates along a center of rotation, the blade comprising at least one cutting portion, and a mounting portion coupled to the cutting portion, the mounting portion having a connection to the cutting portion a base wall and at least one auxiliary cutting wall projecting relative to the base wall and adjacent to the center of rotation.

The beneficial effect of the present invention is that the auxiliary cutting wall protruding adjacent to the rotating center and protruding relative to the base wall can cut the plant near the rotating center during the rotation of the blade to prevent the plant from winding around the blade. Drive the shaft and ensure the smoothness of the blade as it rotates.

2‧‧‧blade

20‧‧‧ Length direction

21‧‧‧ Cutting Department

211‧‧‧Main blade

22‧‧‧Installation Department

221‧‧‧ base wall

222‧‧‧Auxiliary cutting wall

223‧‧‧Assembled holes

224‧‧‧Perforation

225‧‧‧ hole edge

226‧‧‧Auxiliary blade

227‧‧‧Fixed parts

228‧‧‧Fixed section

229‧‧‧sloping section

3‧‧‧Drive shaft

30‧‧‧ Rotation Center

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a perspective view of a conventional lawn mower blade; Figure 2 is a first embodiment of the blade of the present invention 3 is a side view of the first embodiment, showing the relative relationship between the blade and a drive shaft; FIG. 4 is a plan view of the first embodiment; FIG. 5 is one of the blades of the present invention; 2 is an exploded perspective view of a third embodiment of the blade of the present invention; and FIG. 7 is a plan view of a fourth embodiment of the blade of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 2, 3 and 4, a first embodiment of the blade 2 of the present invention can be driven by a drive shaft 3 of the lawn mower and rotated about a center of rotation 30. In this embodiment, the blade 2 is made of metal. The sheet is integrally formed and has an elongated structure extending along a length direction 20, the blade 2 comprising two spaced apart cutting portions 21, and a mounting portion 22 integrally connected between the cutting portions 21, each The cutting portions 21 each have a main cutting edge 211 extending along the longitudinal direction 20.

The mounting portion 22 has a base wall 221 integrally connected to the cutting portions 21, and two auxiliary cutting walls 222 protruding upwardly relative to the base wall 221 and adjacent to the rotating center 30. The base wall 221 has a base An assembly hole 223 penetrating therethrough for mounting the drive shaft 3, and two perforations 224 symmetrically surrounding the assembly hole 223, each perforation 224 having a hole edge 225 adjacent to the assembly hole 223, and the auxiliary The cutting wall 222 is gradually inclined upward from the hole edge 225 of the through hole 224 in a direction away from the assembly hole 223. Each of the auxiliary cutting walls 222 has an auxiliary cutting edge 226, and the auxiliary cutting edges 226 are interposed therebetween. Between one of the cutting edges 211 and the assembly hole 223, and the auxiliary cutting edge 226 is inclined with respect to the longitudinal direction 20, the auxiliary cutting edges 226 and the main cutting edges 211 are both directed toward the plant to be cut.

When the blade 2 is driven to rotate about the rotation center 30 by the drive shaft 3, the main blade 211 except the cutting portions 21 can cut the weeds In addition, the auxiliary cutting edges 226 protruding adjacent to the rotating center 30 and protruding relative to the base wall 221 may also cut plants adjacent to the driving shaft 3, particularly vine plants, and thus, the first embodiment of the present invention The blade 2 is not only novel in structure, but also prevents the vine plants from being wound around the drive shaft 3 to ensure the smoothness of the blade 2 during rotation.

Referring to Figure 5, a second embodiment of the blade 2 of the present invention also includes two cutting portions 21 spaced along the lengthwise direction 20, and a mounting portion 22 positioned between the cutting portions 21, the mounting portion 22 has a base wall 221 integrally connected between the cutting portions 21, two auxiliary cutting walls 222, and a plurality of fixing members 227 for respectively mounting the auxiliary cutting walls 222 on the base wall 221, the base The wall 221 has an assembly aperture 223 positioned between the secondary cutting walls 222, each auxiliary cutting wall 222 having a fixed section 228 bonded to the top surface of the base wall 221, and a cutting adjacent thereto. The portion 21 is gradually inclined upwardly from the inclined section 229, which has an auxiliary cutting edge 226 for cutting the plant.

That is, the auxiliary cutting wall 222 of the second embodiment of the present invention is mounted on the base wall 221 by the fixing members 227, and the auxiliary cutting walls 222 of the first embodiment are integrally extended by the base wall 221. The same creative purpose can be achieved by changing the manner in which the auxiliary cutting walls 222 are formed.

Referring to Figure 6, a third embodiment of the blade 2 of the present invention includes a mounting portion 22, and a plurality of cutting portions 21 extending radially and equiangularly from the mounting portion 22, the mounting portion 22 having a central portion A hole 223 is assembled, and a plurality of auxiliary cutting walls 222 surrounding the assembly hole 223. This is The auxiliary cutting wall 222 of the invention is not limited by the spacing along the length.

Referring to Figure 7, a fourth embodiment of the blade 2 of the present invention is a disk-like structure and includes a centrally located mounting portion 22, and a cutting portion 21 surrounding the mounting portion 22, the cutting portion 21 has a plurality of toothed main cutting edges 211, and the mounting portion 22 also has a centrally disposed assembly hole 223, and two auxiliary cutting walls 222 surrounding the assembly holes 223, and the foregoing structural changes can also achieve the present invention. The intended purpose.

That is, in design, the number of the auxiliary cutting walls 222 of the blade 2 of the present invention may be single, and may be located between the assembly hole 223 and one of the cutting portions 21, and adjacent to the rotation. The center 30, but the symmetrical arrangement has a better balancing effect, and the number of the aforementioned auxiliary cutting walls 222 may also be several. The number of the cutting portions 21 may be two as shown in the single, first and second embodiments shown in the fourth embodiment, or several as shown in the third embodiment.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the simple equivalent changes and modifications made by the scope of the patent application and the patent specification of the present invention are It is still within the scope of the invention patent.

2‧‧‧blade

20‧‧‧ Length direction

21‧‧‧ Cutting Department

211‧‧‧Main blade

22‧‧‧Installation Department

221‧‧‧ base wall

222‧‧‧Auxiliary cutting wall

223‧‧‧Assembled holes

224‧‧‧Perforation

225‧‧‧ hole edge

226‧‧‧Auxiliary blade

Claims (9)

A blade of a lawn mower that is rotatable about a center of rotation by a drive shaft and cuts the plant, comprising: at least one cutting portion; and a mounting portion having a base wall coupled to the cutting portion, and at least one An auxiliary cutting wall that protrudes relative to the base wall and adjacent to the center of rotation. The blade of the lawn mower according to claim 1, comprising two cutting portions, the cutting portions are spaced apart and extending along a length direction, and the mounting portion is located between the cutting portions and has two The auxiliary cutting walls spaced along the length direction. The blade of the lawn mower according to claim 2, wherein the base wall of the mounting portion has an assembly hole positioned at the center of rotation, and the two are spaced along the length direction and positioned on the opposite side of the assembly hole The perforations, the auxiliary cutting walls are integrally extended by one of the hole edges of the perforations, and are gradually inclined upward in a direction away from the assembly hole. The blade of the lawnmower of claim 3, wherein each of the auxiliary cutting walls has an auxiliary cutting edge, each cutting portion has a main cutting edge, and the auxiliary cutting edges and the main cutting edges are all oriented toward the cutting plant. A blade for a lawn mower according to claim 2, wherein the mounting portion further has a plurality of fixing members for joining the auxiliary cutting walls to the base wall. The blade of the lawnmower of claim 5, wherein each of the auxiliary cutting walls has a fixing section for the fixing member to pass through and abut against the base wall, and a fixed section is moved away from the fixing section The direction of the assembly hole Inclined sloped section. The blade of the lawn mower according to claim 6, wherein each of the auxiliary cutting walls has an auxiliary cutting edge, each cutting portion has a main cutting edge, and the auxiliary cutting edges and the main cutting edges are oriented toward the cutting plant. The blade of the lawn mower according to claim 1, comprising a plurality of cutting portions connected to the mounting portion and surrounding the center of rotation. A blade for a lawn mower according to claim 1, wherein the cutting portion has a plurality of main cutting edges surrounding the center of rotation.