Blade mower using a hand grinder

Abstract

The present invention comprises: a rotating disc (100) having a “ ” shape made of steel material, mounted between upper and lower slit holders (20, 30) of a spindle (11) of a hand grinder (10), to increase rotational inertia and centrifugal force; a plurality of teeth (200) having a fish fin shape facing each other in a diagonal direction of the rotating disc (100) and additionally performing a cutting function; and a plurality of blade mounting parts (300) positioned horizontally with an upper and lower 45° angle with respect to the plurality of teeth (200), and rotatable by riveting by a second fastening rivet (320) fastened to the rotating disc (100). By implementing a blade mower using a hand grinder characterized by including a plurality of rake-shaped blades (400) that are rotatably riveted by a third fastening rivet (330) that is fastened to the plurality of blade mounting parts (300), it is possible to ensure safety during mowing in mini gardens of small urban houses, etc., and to easily double-cut grass, dense weeds, tree branches, etc., and to prevent damage to the mower and reduce over-discharge of the rechargeable battery.

Description

Technology Field

[0001] The present invention relates to a blade mower, and more specifically, to a blade mower using a hand grinder that enables the safety of weed cutting in mini-gardens of small urban houses and double cutting of grass or dense weeds through a plurality of rake-shaped blades and fish fin-shaped teeth that can be rotated by a hinge axis on a plate-shaped rotating disc that can be mounted on the spindle of a conventional hand grinder. Background Technology

[0003] Medium to large-sized power mowers are used instead of conventional hand tools such as sickles or saws to remove weeds and young shrubs growing naturally in lawns or grassy areas planted in residential gardens and cemeteries. The blades used in these medium to large-sized mowers include straight blades, circular saw blades, and wires, and they are suitable for relatively large mowing areas.

[0004] In particular, when power-driven straight blades or circular saw blades are used in narrow workspaces, such as the gardens of small urban homes, contact with stones or the ground can cause damage to the blade. Furthermore, the fragments of the damaged blade are scattered in all directions by rotational force, leading to safety accidents that injure workers or neighbors nearby. Additionally, since damaged blades often need to be replaced, there are issues regarding economic losses due to replacement costs and the inconvenience of the replacement process. Moreover, weeds can get tangled or twisted at the point where the brush cutter and blade are joined, which not only reduces the efficiency of the mowing operation but also causes problems such as motor damage due to overload, shortened lifespan, wasted fuel, and over-discharge of the rechargeable battery.

[0005] In addition, when using a power mower to maintain a lawn such as a mini garden, there are noise complaints from neighbors, and there is no reason to use a medium to large mower in a narrow mowing area. However, using manual tools such as scissors, sickles, or saws can present various difficulties for the user.

[0006] To resolve these problems, according to the grinder-attached brush cutter of Korean Registered Model Publication No. 20-0478688 (November 5, 2015) (see FIG. 1), a brush cutter is attached to a grinder through an attachment means.

[0007] However, as shown in FIG. 5, the grinder-attached brush cutter of the above-described patented technology has the function of a general brush cutter, having a brush cutter blade (60) and a brush cutter header (70) for mounting a cutting blade at one end of a brush cutter cover (50) that is long connected to a grinder header (30) which is a power source. Therefore, it is unsuitable for use in narrow workspaces such as small urban gardens. In addition, since separate first and second cover members (10, 10') are provided to connect the brush cutter to the grinder header, significant vibration occurs, reducing user convenience, and there are also problems with safety during the cutting operation because there is no speed control function for the hand grinder with a high rotational speed (RPM). The problem to be solved

[0009] Accordingly, the objective of the present invention is to provide a blade mower using a hand grinder that solves the problems of the prior art and, at the same time, ensures safety during mowing in mini-gardens of small urban houses, etc., and enables easy double cutting of grass, dense weeds, tree branches, etc., through a plurality of rake-shaped blades and fish fin-shaped teeth that can be rotated by a hinge axis on a plate-shaped rotating disc that can be mounted on the spindle of a conventional hand grinder, thereby preventing damage to the mower and reducing over-discharge of the battery. means of solving the problem

[0011] According to the features of the present invention for achieving the aforementioned purpose, a “ made of steel is mounted between the upper and lower joint holders (20, 30) of the spindle (11) of a hand grinder (10) to increase rotational inertia and centrifugal force. A rotating disk (100) having a shape; a plurality of teeth (200) having a fish fin shape facing each other in a diagonal direction of the rotating disk (100) and additionally performing a cutting function; a plurality of blade mounting parts (300) that are horizontally positioned at an angle of 45° vertically with respect to the plurality of teeth (200) and are rotatably riveted by a second fastening rivet (320) fastened to the rotating disk (100);A plurality of rake-shaped blades (400) capable of rotation are included by riveting by a third fastening rivet (330) fastened to the plurality of blade mounting parts (300), and the rotating disk (100) includes a circular fastening member (110) that is fastened between the upper and lower clamp holders (20, 30) of the spindle (11) of the hand grinder (10) and can be mounted by a hexagonal left nut (50), a first prevention projection (120) for preventing the plurality of blade mounting parts (300) for mounting the plurality of rake-shaped blades (400) when the rotating disk (100) rotates at high speed, and a second prevention projection fixed by a first fastening rivet (140) to prevent the plurality of rake-shaped blades (400) from folding toward the inner diameter of the rotating disk (100) when the rotating disk (100) rotates at high speed. Each jaw (130) is provided, and the plurality of teeth (200) are additionally formed on the rotating disk (100) in a shape that gradually increases from small teeth in the direction in which the rotating disk (100) rotates, in order to increase rotational inertia and centrifugal force while simultaneously mowing together with the plurality of rake-shaped blades (400); the plurality of blade mounting parts (300) have a peanut shape, one side is connected to the rotating disk (100), and the other side is connected to the plurality of rake-shaped blades (400) to allow rotation, wherein the one side connected to the rotating disk (100) is riveted with an upper and lower flange (310) that is machined to be smaller in diameter than the other side connected to the plurality of rake-shaped blades (400); and the plurality of rake-shaped blades (400) have a blade back (410) for user handling safety and weeds A blade mower using a hand grinder is provided, characterized by each being equipped with a cutting blade (420) and a rake (430) for gathering weeds to easily cut the weeds.

[0013] According to another embodiment of the present invention, the rotating disk (100) is characterized by having a protective cap (40) provided at the bottom of the lower tidal holder (30) to ensure safety due to the high rotational inertia and centrifugal force. Effects of the invention

[0019] A blade mower using a hand grinder according to a preferred embodiment of the present invention has the following effects.

[0020] (1) Unlike conventional brush cutters, the present invention allows for easy management of narrow gardens, such as mini gardens, through a cutting blade that can be mounted on the spindle of a hand grinder.

[0021] (2) The present invention can ensure work safety during mowing by preventing damage to the blades when they collide with stones or trees through the rotation of the multiple blade mounting parts and the rake-shaped blades, and by preventing stones or blade fragments from scattering to the worker and surrounding workers.

[0022] (3) The present invention allows for double cutting by having multiple teeth and a rake-shaped blade perform the cutting function simultaneously, thereby solving the problem of weeds getting tangled or twisted in the part where the rotating disc is attached.

[0023] (4) The present invention can reduce the overload of the hand grinder drive motor through the high rotational inertia and centrifugal force of the plurality of teeth and the plurality of rake-shaped blades, thereby preventing damage to the motor or shortening of its lifespan, as well as preventing over-discharge of the rechargeable battery. Brief explanation of the drawing

[0025] FIG. 1 is a drawing showing the prior art. FIG. 2 is a drawing schematically showing the overall technical configuration of a blade brush cutter using a hand grinder according to a preferred embodiment of the present invention. FIG. 3 is a drawing showing the shape of a rotary disc of a blade brush cutter using a hand grinder according to a preferred embodiment of the present invention. FIG. 4 is a detailed drawing showing teeth formed and mounted on the rotary disc, a blade mounting part, and a blade of a blade brush cutter using a hand grinder according to a preferred embodiment of the present invention. FIG. 5 is a drawing showing the sequence of mounting a cutting blade to a hand grinder of a blade brush cutter using a hand grinder according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that reference numerals are assigned to the components of each drawing, and that the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, even if the same reference numeral as in the prior art is indicated, the prior art should be interpreted as such. Additionally, while describing the present invention, detailed descriptions of related known components or functions are omitted if it is determined that such detailed descriptions could obscure the essence of the present invention.

[0027] Referring to FIGS. 2 to 5, the core technical means of a blade mower using a hand grinder according to a preferred embodiment of the present invention consists of a rotating disc (100), a plurality of teeth (200), a plurality of blade mounting parts (300), and a plurality of rake-shaped blades (400).

[0028] Referring to FIGS. 2 and 3, the rotary disk (100) is a rotating means for mounting a cutting blade and forming teeth, and is mounted between the upper and lower clamp holders (20, 30) of the spindle (11) of a hand grinder (10), and is made of steel to increase rotational inertia and centrifugal force. It has the shape of a hand grinder. The hand grinder (10) can be a conventional hand grinder, and a hand grinder with a speed control function can be used. The speed control can be adjusted in multiple stages according to the user's lever operation, such as through gear shifting or voltage / current control.

[0029] Here, the upper and lower slant holders (20, 30) are parts that hold a rotating disc (100) having a cutting blade on the spindle (11) of the hand grinder (10), and can be paired with an upper slant holder and a lower slant holder, or mounted as a lower slant holder alone. In addition, the rotating disc (100) “ By processing and manufacturing to have the shape of a plurality of teeth (200) that enable additional cutting along with the plurality of rake-shaped blades (400) in the diagonal direction of the rotary disc (100), and riveting the plurality of blade mounting parts (300) that mount the plurality of rake-shaped blades (400) on the left and right sides, the rotational inertia and centrifugal force of the rotary disc (100) are greatly increased, thereby resolving the problem of weeds getting tangled or twisted with a strong cutting force during cutting work, and reducing the overload of the drive motor of the hand grinder (10), thereby preventing the problem of the motor being damaged or its lifespan being shortened and preventing over-discharge of the rechargeable battery.

[0030] In addition, the power supplied to the hand grinder (10) according to an embodiment of the present invention may be selected from either alternating current (AC) or a rechargeable battery (DC).

[0031] Here, it is preferable to adopt a rechargeable battery (DC) method for the power supplied to the hand grinder (10) to facilitate movement during mowing operations. In addition, to ensure safety due to high rotational inertia and centrifugal force, and to prevent the hexagonal left nut (50) from loosening due to stones or tree branches during mowing operations, a protective cap (40) may be attached to the bottom of the lower manhole holder (30).

[0032] In addition, the rotating disk (100) according to an embodiment of the present invention is provided with a circular fastening member (110) that is fastened between the upper and lower joint holders (20, 30) of the hand grinder (10) spindle (11) and can be mounted by a hexagonal left nut (50), a first prevention jaw (120) for preventing the overturning of the plurality of blade mounting parts (300) that mount the plurality of rake-shaped blades (400) when the rotating disk (100) rotates at high speed, and a second prevention jaw (130) that is fixed by a first fastening rivet (140) to prevent the plurality of rake-shaped blades (400) from folding toward the inner diameter of the rotating disk (100) when the rotating disk (100) rotates at high speed.

[0033] Here, the first prevention jaw (120) and the second prevention jaw (130) are such that when the rotating disk (100) rotates at high speed with high inertia, if the first prevention jaw (120) does not prevent the plurality of blade mounting parts (300) from overturning in the direction of rotation, the plurality of rake-shaped blades (400) cannot have sufficient centrifugal force, and thus the phenomenon of the blades folding cannot be prevented. Additionally, through the second prevention jaw (130), if the plurality of rake-shaped blades (400) collide with a stone or thick branch during mowing and the mowing blades are temporarily stopped, the plurality of rake-shaped blades (400) may be excessively folded or jammed toward the inner diameter of the rotating disk (100), thereby preventing damage to the blades. When the temporary stop is released, the blades immediately recover centrifugal force, enabling mowing.

[0034] Referring to FIG. 4, the plurality of teeth (200) additionally perform a cutting function by having fish fin shapes facing each other in the diagonal direction of the rotating disk (100) as a means to additionally cut together with the plurality of rake-shaped blades (400) and increase rotational inertia.

[0035] In addition, according to an embodiment of the present invention, the plurality of teeth (200) are formed in a plurality on the rotating disk (100) in a shape that gradually increases from small teeth in the direction in which the rotating disk (100) rotates, in order to additionally cut together with the plurality of rake-shaped blades (400) and simultaneously increase rotational inertia.

[0036] Here, the plurality of teeth (200) are processed into a fish fin shape so as to face each other in the diagonal direction of the rotating disk (100) by laser cutting, lathe processing, or press processing when processing the rotating disk (100). By forming the plurality of teeth (200) having such a fish fin shape so as to face each other in the diagonal direction of the rotating disk (100), a flywheel effect utilizing kinetic inertia is obtained from the law of inertia, which is Newton's first law, thereby greatly increasing the rotational inertia force and centrifugal force of the blade. In other words, the plurality of rake-shaped blades (400) that can rotate within the plurality of blade mounting parts (300) can extend the blades in a straight line with high rotational inertia force and centrifugal force to easily cut dense weeds, and at the same time, through the plurality of teeth (200), weeds and tree branches that were not removed can be additionally mowing. In addition, the plurality of teeth (200) can perform double cutting together with the plurality of rake-shaped blades (400), thereby resolving the problem of weeds getting tangled or twisted at the part where the cutting blades are attached, which can further increase the cutting efficiency of the worker. Furthermore, through the high rotational inertia and centrifugal force of the plurality of teeth (200) and the plurality of rake-shaped blades (400), there is a unique feature that reduces the overload on the drive motor of the hand grinder, thereby preventing problems such as motor damage or shortened lifespan, and preventing over-discharge of the rechargeable battery.

[0037] Referring to FIGS. 2 and 4, the plurality of blade mounting parts (300) are a means for mounting blades for cutting grass or weeds, and are positioned horizontally at an angle of 45° vertically with respect to the plurality of teeth (200), and can be rotated by riveting by a second fastening rivet (320) that is fastened to the rotating disk (100).

[0038] Here, the plurality of blade mounting parts (300) are positioned horizontally between the plurality of teeth (200) at an angle of 45° vertically to prevent the blades from colliding with each other between the plurality of teeth (200) and the plurality of rake-shaped blades (400), increase the efficiency of double cutting performed on each of the plurality of teeth (200) and the plurality of rake-shaped blades (400), and resolve the problem of weeds getting tangled or twisted during cutting.

[0039] In addition, the plurality of blade mounting portions (300) according to an embodiment of the present invention have a peanut shape, and one side is connected to the rotating disk (100), and the other side is riveted with an upper and lower flange (310) that allows the plurality of rake-shaped blades (400) to be connected and rotated.

[0040] Here, the plurality of flanges (310) of the plurality of blade mounting parts (300) are manufactured in a peanut shape, and the one side connected to the rotating disk (100) is manufactured with a diameter smaller than that of the other side connected to the plurality of rake-shaped blades (400), thereby increasing the rotational capability of the plurality of blade mounting parts (300). Due to this high rotational capability, the plurality of rake-shaped blades (400) can be easily folded when they come into contact with stones or wood, thereby mitigating the impact and protecting the plurality of rake-shaped blades (400).

[0041] Referring to FIGS. 2 and 4, the plurality of rake-shaped blades (400) are riveted to a third fastening rivet (330) that is fastened to the plurality of blade mounting parts (300) as a means for cutting weeds or branches, and can rotate.

[0042] Here, the plurality of rake-shaped blades (400) are fastened to the blade mounting part (300) and made rotatable by the third fastening rivet (330) so that when the plurality of rake-shaped blades (400) come into contact with a stone or thick tree during mowing, the blades are prevented from breaking and being damaged by rotating within the blade mounting part (300) and prevented from scattering and causing injury to surrounding workers.

[0043] In addition, the plurality of rake-shaped blades (400) according to an embodiment of the present invention are each equipped with a blade back (410) for user safety, a blade (420) for cutting weeds, and a rake (430) for gathering weeds to easily cut weeds.

[0044] Here, the back of the blade (410) is for maintaining the durability of the plurality of rake-shaped blades (400), the blade (420) is for improving the cutting ability, and the rake (430) is for allowing the weeds to be easily cut by gathering them through the rake (430) when cutting thick weeds using the principle of a sickle, which is a hand tool.

[0045] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0047] 10: Hand grinder 11: Spindle 20 : Upper high tide holder 30 : Lower high tide holder 40: Protective cap 50: Hex left-hand nut 100 : Rotating disc 110 : Circular fastener 120: 1st barrier 130: 2nd barrier 140: First fastening rivet 200: Multiple teeth 300: Multiple blade mounting section 310: Upper and lower flanges 320: Second fastening rivet 330: Third fastening rivet 400: Multiple rake-shaped blades 410: Back of the blade 420 : Blade 430 : Rake

Claims

Claim 1 It is mounted between the upper and lower joint holders (20, 30) of the spindle (11) of a hand grinder (10), and is made of steel to increase rotational inertia and centrifugal force. A rotating disk (100) having a shape; a plurality of teeth (200) having a fish fin shape facing each other in a diagonal direction of the rotating disk (100) and additionally performing a cutting function; a plurality of blade mounting parts (300) that are horizontally positioned at an angle of 45° vertically with respect to the plurality of teeth (200) and are rotatable by riveting by a second fastening rivet (320) fastened to the rotating disk (100);A plurality of rake-shaped blades (400) capable of rotation are included by riveting by a third fastening rivet (330) fastened to the plurality of blade mounting parts (300) above, and the rotating disk (100) includes a circular fastening member (110) that is fastened between the upper and lower clamp holders (20, 30) of the spindle (11) of the hand grinder (10) and can be mounted by a hexagonal left nut (50), a first prevention projection (120) for preventing the plurality of blade mounting parts (300) for mounting the plurality of rake-shaped blades (400) when the rotating disk (100) rotates at high speed, and a second prevention projection fixed by a first fastening rivet (140) to prevent the plurality of rake-shaped blades (400) from folding toward the inner diameter of the rotating disk (100) when the rotating disk (100) rotates at high speed. Each jaw (130) is provided, and the plurality of teeth (200) are additionally formed on the rotating disk (100) in a shape that gradually increases from small teeth in the direction in which the rotating disk (100) rotates, in order to increase rotational inertia and centrifugal force while simultaneously cutting together with the plurality of rake-shaped blades (400); the plurality of blade mounting parts (300) have a peanut shape, one side is connected to the rotating disk (100), and the other side is connected to the plurality of rake-shaped blades (400) to allow rotation, wherein the one side connected to the rotating disk (100) is riveted with an upper and lower flange (310) that is machined to be smaller in diameter than the other side connected to the plurality of rake-shaped blades (400); and the plurality of rake-shaped blades (400) include a blade back (410) for user handling safety and A blade mower using a hand grinder, characterized by each being equipped with a blade (420) for cutting weeds and a rake (430) for gathering weeds to easily cut the weeds. Claim 2 delete Claim 3 A blade trimmer using a hand grinder, characterized in that, in the first paragraph, the rotating disc (100) is provided with a protective cap (40) at the bottom of the lower manhole holder (30) to ensure safety due to the high rotational inertia and centrifugal force. Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete

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