KR102091316B1 - The glass cutter knife with the flotation - Google Patents

Abstract

The present invention relates to a mowing blade and is composed of four wings (cross shape), and a cutting blade and a floating blade are integrated into one blade. In other words, the horizontal rotating disk has a power transmission hole at the center, and four wings are arranged symmetrically (at an interval of 90 degrees), horizontal cutting is arranged at the front of the blade, and a downward floating blade is arranged at the rear. The cutting blade is level with the rotating disk, and in a rotating form, the grass entering the cutting blade is sharply processed in the form of an arc like a sickle so that it is cut on the spot without slipping out, and a small blade can be cut by making a saw blade at the end. Enabled. The floating blade is shorter than the cutting blade to avoid wear or breakage during cutting, and the lifting rod is large enough to not feel the weight of the working rod (with nylon blades combined) (when the accelerator lever is placed in the middle, the working rod is placed on the cement floor. The stomach was bent downward to obtain floating buoyancy.
Here, the nylon blade combined with the present invention is located between the floor and the present invention, so that the safety of the height can be obtained, and the work type can be changed according to the length and shortness of the nylon string. First, if the nylon string is shortened (for safety purposes only), the mower's rotational force does not decrease, and the cutting force is maintained. Therefore, the method preferred by farmers or professional workers who work to cut a large amount of grass once in the middle Will be.
Next, when the nylon string is pulled long (mowing function and safety function), the cutting blade of the present invention cuts thick or large grass, and the nylon string cuts the grass on the floor. It would be a good way for beginners to fit in.
In conclusion, through the present invention, it is possible to obtain various cutting forces (planar 4 blade-saw and saw cutting force, nylon blades) and large flotation force (4 downward blades) in one rotation, and work rods equipped with nylon blades to achieve a safety role. I can't feel the weight, so I can bring safe and comfortable work, and I think it can dramatically improve the working environment and efficiency.

Description

The cutting blade with a buoyant force {THE GLASS CUTTER KNIFE WITH THE FLOTATION}

The present invention relates to a cutting blade for a lawn mower, and more particularly, to a cutting blade for a mower having a buoyancy force. Existing portable engine mowers made the work difficult due to various factors such as irregular working environment, heavy work rod, and danger from high-speed rotation work. Many attempts have been made to solve this problem, but as a result of attaching various devices for work safety, it has caused other problems such as reduced cutting force and increased weight. Accordingly, the present invention approached the direction in which the cutting force of the horizontal cutting edge was maintained and the lifting force was increased to offset the weight of the work rod equipped with a safety component (nylon blade).

[Advanced technical literature]

With the emergence of a mower with strong driving force, the mowing work that used to be a scythe in a prone position was possible to work in a standing position, and the work efficiency was also greatly improved. However, it has become a difficult and dangerous work due to the high-speed rotation work characteristics in the irregular and invisible pool. In other words, it became a tough task that was much heavier than a scythe while holding a heavy mower (on average, about 10 kg), and it was a difficult task to swing with a large work rod. It became a dangerous work due to the impact when 'stops at zero (0), and scattered products such as cut grass or stones flying toward the worker.

Fortunately, over time, efforts have been made to improve this heavy and dangerous form of work.

* Efforts to reduce weight

First of all, it literally led to the development of a light-weight mower (mower for batteries: around 2 kg, mower for butane cuts: around 5 kg), which has the disadvantage of short operating time and weak rotational force.

Next, the flotation fan was inserted in an effort to reduce the weight of the working rod by raising the flotation force (Public Patent 10-2013-0133982, Utility Model 20-0474494-000) or twisting a portion of the cutting blade (Patent 10) -2014-0099664) Due to its location, it was not free from friction with the floor, and the buoyancy was also minimal.

* Efforts to reduce risk

Basically, various covers were developed to prevent scattering, and various safety parts were combined between the floor and the cutting edge. Safety is obtained by attaching a supporting device (sled type, patent 10-0736334), a sliding roller (utility model 20-306215), a safety plate (starfish type, utility model 20-0238542, utility model 20-0471933) and floating. However, such efforts had the side effect of increasing the weight of the working rod. I tried changing the shape of the cutting blade in other ways, such as a folding blade (refractive blade, public utility model 2000-0003485), a blade with a blade hidden in a disc shape (utility model 20-0455207), and a nylon blade (which can work cleanly to the floor. It was established as a successful single blade of the form that could be achieved.) The safety was sought, but the rotational cutting force was also gradually decreased.

As a result, the working time was increased by reducing the cutting force for safety, and as the safety parts were combined, the worker's fatigue was also increased by doubling the working rod weight, leading to a reduction in the work rate.

The present invention was devised in order to solve the above-mentioned problems, and it is an object of the present invention to provide a mower cutting blade having a lifting force that reduces the weight so that the mowing work is safely performed and the work weight cannot be felt.

The present invention is a cutting blade with a lifting force, the engaging hole (11) coupled to the gear bundle provided at the end of the working rod of the engine mower; A horizontal disc portion 10 including the coupling hole 11 in the center; And four blades formed in a cross shape on the horizontal disk portion 10, wherein the four blade portions are horizontally machined horizontally on the front end side and the rear end side, respectively, based on the rotation direction. Consists of a floating blade 30 bent downward with a predetermined radius of curvature, the horizontal cutting blade 20 is a sickle shape with a side end closed in a straight line, and a cutting surface 21 positioned at the front end side and closed in a straight line It consists of a saw blade surface 22 located on the side, processing the cutting surface 21 in the lower portion in the thickness direction of the horizontal cutting blade 20, the floating blade 30 is the horizontal cutting blade (20) It bends downward with a predetermined radius of curvature in the boundary region 31 of the fruit, but is formed in a curved rectangular shape to increase the degree of bending toward the end, and has a curved region 32 provided at the side end, and the saw blade surface (22) is the outer periphery than the bent area (32) It is configured to protrude further in the direction, and the cushioning part 40 that reduces the cutting impact while supporting the side surface of the horizontal cutting blade 20 at a portion where the floating blade 30 contacts the horizontal disk 10 It is provided. The present invention has been devised to solve the maintenance of cutting force, reduction of weight, and safety, and approached the problem solution in two directions. First, the cutting force was increased to 4 blades and polished in the form of an arc (scythe) to improve the cutting force, and weight reduction or safety approach approached to maximize the lifting force. In other words, four flotation blades were used to obtain a strong flotation force, which eliminated the work weight of the nylon blade (safety function). To this end, four blades are attached to a horizontal rotating disk having a power transmission hole at the center, and the front side is a cutting blade and the rear side is integrated with a floating blade on each of the blades, thereby leading to the present invention.

The present invention can increase work efficiency by enabling a comfortable operation because it exhibits a fast, strong, sharp cutting force and reduces weight. And the present invention is secured by the nylon blade attached to the lower end, and the length of the nylon string can be varied to diversify the work type.
The present invention eliminates the mowing function by winding the string of the nylon blade shortly, and only acts as a safety function that prevents collision and friction between the floor and the present invention, so that the mowing power can be fully exhibited to perform many tasks quickly. .

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1 is a plan view according to an embodiment of the present invention.
Figure 2 is a perspective view of the tip of the wing to implement the present invention.
Figure 3 is a plan view for explaining the operation of the wing component for practicing the present invention.
Figure 4 is a plan view for explaining the disadvantages of the day the applicant filed (20-2015-0005728).
Figure 5 is a perspective view showing the procedure of assembling the lawn mower as an embodiment of the present invention.
Figure 6 is a picture according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. When weeding with a two-blade blade in a weed slope with many weeds, such as old grain, raspberries, briers, silver grass and barley, it was replaced with a nylon blade because it has good cutting power and is dangerous. It had less friction or collision, so the cutting force was weak, and the cut grass was wound between the gear bundle and the nylon blade, and rotation had to be stopped and released every time. According to the present invention, since the two blades are sandwiched between the washers A and B, the cutting force is kept away from the floor, and friction or collision is also reduced. Such a configuration can perform a safe operation while maintaining cutting force, but becomes heavy.

In order to reduce the weight, it is necessary to improve the structure of the cutting blade with lift force. The structure was improved by twisting the second blade, but it was insufficient to obtain sufficient buoyancy. If two blades are added and four blades are provided, and the length of each blade is also increased, a desired buoyancy force can be obtained (see FIG. 6, picture 1). However, since this structure only considers the lifting force, if the blade is deformed due to contact with grass or stone, the rotation becomes unstable, and the reliability of the lifting force is not constant.

To solve this, it can be solved by placing the front part of the cutting blade horizontally to serve as a cutting blade, and bending the rear part downward to process the role of a floating blade (see photo 2 in FIG. 6).

Significant synergy can be obtained even if the four blades are combined with a cutting blade and a nylon blade. However, you can find some problems. Among them, the impact received while cutting the grass is concentrated between the four wings, causing cracking points (see FIG. 4) and deformation due to friction with the floor or stone, etc., because the downward blade is located at the bottom. To solve this, replace the material of the lower blade with a stronger material (SK-5). In addition, the rotational force of the mower is divided into the cutting force and the lifting force, so that the cutting force is reduced can be made up by increasing the rotational speed, and above all, it has the advantage of being able to work without burden.

According to the present invention, by changing the shape of the cutting blade, it is possible to reduce the wear or deformation of the floating blade and increase the cutting force. This will be described in detail below.

The present invention is a product completed while making, using, and supplementing in the process of finding and solving problems while working directly. So, since it is considered that it exhibits the best performance, only the essential components of the present invention are explained without any additional problems. That is, it is preferable to be already composed of four wings, it can have sufficient flotation force for a plurality of four or more wings, and this falls within the scope of the technical idea of the present invention.

Referring to Figure 1 to look at the structure of the cutting blade of the present invention. The cutting blade is provided with a hole 11 in the center of the gear assembly of the mower. Four wings are arranged in a cross shape on the horizontal disk 13 having a diameter of 9 cm of the cutting blade. It is preferable that the four blades of the cutting blade are each formed by a horizontal cutting blade at the front end in the rotational direction and a downward floating blade at the rear end to be integrated. The diameter of the horizontal disk of the cutting blade is 9 cm, assuming the case where the gear bundle cover of the mower is 9 cm in diameter, because it rotates at the bottom. When the diameter of the gear bundle cover of the lawn mower is greater than 9 cm, the size of the diameter of the horizontal disc may also vary depending on the size of the gear bundle cover. When the diameter of the horizontal disc increases, the length of the wing (surface area) decreases, and the buoyancy force decreases. If it is small, the downwardly bent flotation blade floats with the top of the nylon blade (diameter 9 cm). Process 4 blades on this horizontal disk, and look at the blades, horizontally process the tip side in the rotational direction to act as a cutting blade based on the bending line 31, and bend the rear side to bend down to obtain a buoyancy force. To process.

Let's take a look at the shape and function of each part.

The shape of the cutting blade is in the form of a thick sickle (ho) outside the rotation. Thus, by adopting the sickle-shaped torn structure of the cutting blade, it is possible to make up for the cutting force reduced by the lifting force. When the blade shape is a rhombus with a thin outer shape, it encounters a tough grass such as silver grass, and it slides out and is not easy to cut (see b in FIG. 4). The present invention is configured to hold the angle so that the outer side of the blade rotates first when rotating (see 14 in FIG. 3). This is a configuration that allows the grass that has entered between the wings to be cut as if being wound inward on a sharply processed blade without being pushed outward (see 14 in FIG. 3). Here, the thickening of the outside is to make a sickle-shaped arc, but it is intended to increase the cutting force by making the rotating outside heavy, and use it while continuing to polish the abrasive cutting blade. Machining of the cutting blade is applied to the lower side of the blade thickness, which is intended to get more buoyancy by sending the air even slightly down. In addition, a saw blade may be provided on the outside of the cutting blade to cut a little thicker wood (see FIG. 2 22).

The floating blade of the cutting blade can be machined in such a way that the two ends of the rectangle are gathered inside. When this shape is obtained, air flow is concentrated in the middle of the cutting blade, and the end of the cutting blade is processed to bend downward (see FIG. 2, 32), thereby increasing the buoyancy force by sending downward air outflow during rotation. I can do it. This structure also prevents the downward curve of the floating edge from being deformed by friction with the floor. And by reducing the length than the cutting blade (see A in Figure 3), it is possible to reduce the wear and tear of the floating blade. The inside of the blade is rectangular, and is configured to maintain the downward curve of the floating blade with the portion 40 bending downward to obtain the maximum area. As the impact received while the blade is being cut is concentrated, it is cut to a curved shape to prevent cracking and disperse the impact.

According to an embodiment of the present invention, as a product of effort obtained in order to bring out the best performance in the working process by the end of a work rod, an irregular and dangerous environment, and a powerful machine, the buoyancy is improved in comparison with a simple form (two blades). And a four-blade blade that includes a differential configuration that also improves cutting power.

As you walk along the road, you see a field where mowers wearing face protection and wearing protective aprons are working with only two iron blades without protective cover. The protective cover that combines over the mowing blade prevents a lot of scattering when using a nylon blade, but when using a two-blade blade, rather, long cut grass wraps well on this cover. Working in a more dangerous work environment. There are many products that emphasize safety these days, but when used in combination, the cutting force becomes weaker or heavier and is ignored by farmers and professional workers. If the present invention appears in such a situation, it will be a welcome presence of workers and a lot of gratitude.

In addition, the present invention is simple and easy to manufacture without any clutter (laser cutting-bending-processing-heat treatment-painting, printing), and is easy to separate and combine with the working rod (Fig. 5, the present invention without fixing the gear bundle with a pin) Grab it and turn the nylon blade by hand). Also, through the combination with the nylon blade, the lawn mower is safer, and it is possible to immediately respond to various types of grass and various work environments, and it is considered that it leads to an increase in work speed and workload while transforming into a more comfortable work.

10; Assembly (horizontal disc) 11; Coupling hole 20; Cutting blade
21; Cutting edge cutting line 22; Saw blade 30; Flotation day
31; The boundary line between the cutting blade and the floating blade 32; Bend line 40; The part that supports the floating blade

Claims (3)

In the mowing blade with a lifting force,
A coupling hole 11 coupled to a gear bundle provided at the end of the working rod of the engine mower;
A horizontal disc portion 10 including the coupling hole 11 in the center; And
Includes; four wings formed in the shape of a cross on the horizontal disk portion (10),
Each of the four wing parts is composed of a horizontal cutting blade 20, which is horizontally processed on the front end side based on a rotation direction, and a floating blade 30, which is downwardly bent with a predetermined radius of curvature on the rear end side,
The horizontal cutting blade 20 is a sickle shape with a side end terminated in a straight line, and is composed of a cutting surface 21 positioned at the front end side and a saw blade surface 22 positioned at a side closed with a straight line, and the horizontal cutting blade In the thickness direction of (20), processing the cut surface 21 in the lower part,
The floating blade 30 is bent downward with a predetermined radius of curvature in the boundary region 31 with the horizontal cutting blade 20, but is configured in a curved rectangular shape to increase the degree of bending toward the end. It is provided with the provided bending area (32),
The saw blade surface 22 is configured to protrude more in the outer circumferential direction than the curved region 32,
Lifting force characterized in that the floating blade 30 is provided with a buffer portion 40 to reduce the cutting impact while supporting the side of the horizontal cutting blade 20 to the portion in contact with the horizontal disk portion (10) Equipped mower cutting blade. delete delete

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