JP2015107083A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower which can be easily used by anyone for solving a problem in which although an overwhelmingly widespread bush cutter among generally widespread mowers at this present time is easy to use, an operation, in which an engine-equipped machine is carried on a shoulder or a back and which is performed in the environment where there are engine vibration, noise, and exhaust gas, can be a severe work if it is used for a long period of time, and it is suitable only for an expert and not for an elderly person or a woman.SOLUTION: A mower has a self-standing and self-propelling type mechanism. Two mowing parts 2 constituted by superimposing a mowing blade part 21 in which a rod-like blade is formed in a cross shape, a discharge facilitating plate 213, a mowing blade pressing cap, and a scattering prevention cover 22 are arranged almost just beside in a travel direction on a mowing travel surface between a front wheel 4 and rear wheels 3. The mowing blade parts 21 are rotated and synchronized while keeping a rotation phase difference angle at the almost central part of a machine body inner side from machine body left and right outer sides in the same plane so that the rotations match.

Description

The present invention relates to a general-purpose mowing machine for general use, which has been developed in response to the demands of the times and has developed a new type that has not existed before.

General-purpose mowers that are currently in widespread use are: 1. Mower (for example, Patent Document 1) 2. A mowing machine (for example, Patent Document 2); It can be roughly divided into three types of riding mowers (for example, Patent Document 4). Also 2. As a derivation type, there is a general-purpose improved type (Patent Document 3) without limiting the function to the original hay cutting. Of these, the number of mowers is overwhelming because of its simplicity and low price compared to the other two. However, although it is easy, carrying an engine-equipped machine on the shoulder and carrying it on the shoulder, operation in the presence of engine vibration, noise, and exhaust gas becomes a harsh work for a long time, which is naturally a work for adult men, Unless it is a very skilled person, it is not suitable for the elderly and women.
For this reason, there has long been a need for something that is as cheap and easy as a mower, and that can be used by anyone, the elderly and women. In recent years, the demand has become stronger as the era of an aging society has finally changed, and people who have been accustomed to using mowers for many years have become aging. Yes.

JP-A-11-9051 Japanese Patent Laid-Open No. 7-177811 JP-A-8-214665 Japanese Patent No. 4304455 JP 2001-112321 A Japanese Utility Model 5-91238 JP2013-183710A

As a new type mowing machine that can be used easily by anyone, the elderly and women, several ideas have been proposed about 10 years ago. One with a wheel attached to a mower as it is (for example, Patent Document 5), one with a larger gardening mower (for example, Patent Document 6), one with a combination of a mower and a grass mower (for example, Patent Document 7), And so on. However, none of them has yet become widespread, and new types have not yet become established. Because it is still a marketing-oriented product, cost is given priority, and it is also attributed to the fact that it is an unfinished product that does not fully consider the texture and safety of the product.
Clarifying the problem of commercialization of the mower located next to the mower, which has not been established in the market as many products have been tried, and solved this, “Easy and cheap as the mower, and anyone We will provide a general-purpose mower that can be used easily and can contribute to the aging society in the future.

The means taken in the present invention in order to solve the above-mentioned problems is a self-propelled self-propelled mechanism as a mower that can be easily used by anyone and equipped with a prime mover such as an engine or a motor. This is because anyone who needs human power, such as carrying on the shoulder, carrying on the back, or the like, will not be able to use it easily.
The mowing unit driven by the mounted prime mover is composed of a rotary mowing blade that has a rod-like blade in a cross shape or a multi-cross shape, a mowing grass discharge plate, a mowing blade presser cap, and a mowing grass scattering prevention cover. Arrange two parts of the mowing part, which is composed of overlapping parts, on the mowing running surface between the front wheel and the rear wheel, so that the cutting blade is from the wheel tread width or the body width in the lateral direction of the machine. Cross rolling like gears while maintaining the rotational phase difference angle so that the rotation overlaps in the same plane from the outside to the inside of the aircraft in the same plane, that is, the rod-shaped blades do not collide with each other It was provided to rotate in a shape. This is the same as 1.2.3. It is a completely new blade and cutting method not used in any of the above. In order to increase the effect of this mowing method, the three-wheel configuration of a pair of driving rear wheels and one front wheel was finally adopted as a self-propelled type.

  A plate-shaped front cover that covers the flat projection surface of the mowing unit is installed directly above the mowing unit to raise the mowing efficiency in a self-propelled type that is different from the mower. A bar-like or plate-like protrusion was provided on each side surface of the inner central portion of the machine body so as to face the rotation direction of the rotary cutting blade substantially in parallel with the machine body traveling direction. In addition, for work safety, a flexible belt-like cover such as rubber or resin is provided on the entire side of the cutting blade cover in the lateral direction of the machine body, and a rigid plate such as metal or hard plastic is provided on a part of each side. It was.

In order to further improve the manufacturing quality of the new method, after the rod-shaped blade and the discharge plate are assembled with the assembling jig before mounting the machine body so that the rotating core is aligned before the rotation of the machine body. The nut is attached to the rotary shaft of the cutting blade, and the height of the hook-like portion to which the nut of the cutting blade holding cap is attached is made such that the thickness of the mounting nut is hidden.

  The present invention has the following effects by applying the above means.

  It is as easy as mowing machines that have been widely used in the past, and anyone, elderly women and women can easily mowing. Elderly people who have used mowers for many years can continue their work and contribute to the social participation of senior generation.

Although it is a self-propelled type, the cost has been reduced to the same level as a high-end mower, so it is very cheap compared to the conventional self-propelled type and passenger type, and it can be used as easily and cheaply as a mower. I can do it.

In order to increase the mowing efficiency, a conventional mowing unit in which two cutting blades of a conventional mower are arranged is used. However, a triple, quadruple or multiple configuration may be used. However, if it becomes three or more, it will become larger, so it will not be as easy as a brush cutter. Furthermore, the mechanism in the cross rolling state of the mowing blade discovered during development becomes difficult and complicated if it is more than three, and the configuration in the double state in this embodiment is the best form that can follow the ease of the mower. It is.

  A first embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a right perspective view showing an embodiment of the mowing machine of the present invention, FIG. 2 is a left side view with the main cover 9 removed, FIG. 3 is a front view, and FIG. 4 is a cutting blade portion developed on the right side 21R. FIG. 5 is a perspective view showing the left side 23L of the anti-scattering cover developed in the present application. The illustration is partially omitted for clarity. The main structure is a brush cutter engine 1, a pair of left and right (LR) mowing parts 2, a pair of left and right (LR) driving rear wheels 3, a front wheel 4, a traveling mission 5, a cutting blade and a counter mission 6 for driving rear wheels, With the steering handlebar 7, the self-propelled machine is reduced to the minimum weight necessary. In particular, the pipe-shaped aluminum housing of the counter mission 6 that transmits the shaft output of the engine 1 mainly to the drive shaft and the bevel gear (not shown) and is transmitted to the pair of cutting blades 21 and the traveling mission 5 is also used as the fuselage frame. Although it is a self-propelled machine, it has a very simple configuration that does not use any chassis or frame for the aircraft.

  The drive mechanism takes the shaft output of the engine 1 produced for the brush cutter as it is into the counter mission 6 and converts the rotation axis direction mainly by the bevel gear (not shown), one to the traveling mission 5 and one to the cutting part. The engine speed is transmitted as it is to the left side 2L and one to the right side 2R of the cutting part. The counter mission 6 is a 1-input 3-output pipe housing-like mechanism that also serves as a fuselage frame. The output to the cutting blade through the main pipe in the brush cutter is configured by dividing the main pipe output into three parts. Here, the left and right mowing parts 2L, 2R rotate in the opposite direction from the outside of the body toward the center of the body, that is, rolling. The traveling mission 5 decelerates the rotational speed of the engine 1 and outputs it to the driving rear wheel 3.

  The configuration of the mowing unit 2 that performs the mowing operation is largely divided into a cutting blade unit 21 that is a rotating unit and a scattering prevention cover 22 that is fixed to the pipe housing of the counter mission 6 with its protective cover. Both were developed from the conventional mowers and developed for self-propelled use. The cutting blade portion 21 is composed of five parts: a main knife 211, a secondary knife 212, a discharge promoting plate 213, a cutting blade pressing cap 214 (FIGS. 3 and 8), and a cutting blade nut 215 (FIG. 8). Here, the knives 211 and 212, which are the cutting blades, greatly jumped from the disk-shaped blades of the brush cutter to form two rod-shaped blades (knives) in a cross shape (FIG. 4). This is because of the new method of cross-cutting “cross rolling mowing” developed later. The discharge promotion plate 213 is used to prevent entanglement immediately after cutting the mowing grass, and is used only for a part of hand-held mowers. Similar ones are used.

  The scattering prevention cover 22 is not sufficient to be used in a brush cutter due to self-propelled construction, and a scattering prevention side cover 222 made of rubber or vinyl sheet is attached to the side surface of the cover body as well as the riding type. Furthermore, a side guard plate 223 made of metal or hard resin is attached as a safety measure so that the foot does not enter the cover 22. Apart from the original scattering prevention and safety measures of the above cover, in the present invention, the rotary blade is sharpened substantially parallel to the traveling direction of the body so as to face the rotational direction of the rotary blade at the center of the body of the cover. Alternatively, a bar-shaped discharge promoting bar 221 was attached so as to wipe off. This has further improved the prevention of entanglement of the mowing blades 21 to the mowing blade part 21 as well as the completeness of the cross rolling mowing method, dramatically increasing the continuous sustainability of mowing work and increasing the frequency of immediate interruption of trouble during the work. We succeeded in reducing it greatly.

  The above is the overall structure of the machine body and the structure of the mowing unit 2 that is the mowing operation unit. In the present invention, in addition to the above-mentioned minimum necessary elements as a self-propelled mower, the front cover 8 is installed in the true part of the mowing unit 2. At the top, it was attached to the machine frame, that is, the counter mission 6 so that the front edge slightly protrudes from the rotating tip of the cutting blade portion 21. This was originally aimed at guarding from dust dust such as grass smoke, but it is also an indispensable element for the mowing method (cross-rolling mowing) developed in this application.

  The functional performance of each element in the mowing work with the mowing machine of the present invention will be described with reference to FIG. The figure is a plan perspective view for easy explanation. First, the front wheel 4 breaks like a wedge into the front grass, and the grass wall is divided into left and right. Next, the front surface of the front cover 8 comes into contact with the grass wall to align the plant height direction and starts to tilt forward. Immediately after, cutting by the cutting blade portion 21 starts. Almost simultaneously with the cutting, the mowed grass is rotated and discharged to the center of the machine body by the discharge promotion plate 213 of the cutting blade portion 21 while being fallen by the front cover 8. The discharge promoting bar 221 on the anti-scattering cover 22 stops and cuts the grass that tries to continue to rotate without being discharged, and prevents the cutting blade portion 21 from being entangled. As a result, the cut grass is guided and discharged between the center of the fuselage, mainly between the left and right discharge promotion bars 221L and 221R. During the above mowing operation, the aircraft continues to advance. On the other hand, when viewing the aircraft with the airframe stationary, the grass that flows from the front is separated into left and right by the front wheel 4 and mowed, and guided by the left and right discharge promotion bars 221L and 221R through the left and right cutting blades 21L and 21R. From the discharged outlet, it seems to be rolled out like crushed dust, like a rolled product, or like a steel plate.

  The development that began with increasing the work efficiency by arranging two blades of mowers for self-propelled operation was a three-wheel configuration by finally developing a new mowing method with the above rolling effect after many ideas. Decided. If there is no front wheel 4, even if the grass is uneven, if it tries to come into contact with a certain area, it becomes a wall (grass wall) and receives resistance, resulting in trouble of work interruption. By providing a front wheel in the center of the two cutting blades, there is an effect of preparing for mowing in advance. The front wheel 4 first breaks into the grass wall like a wedge, so that preparations for cutting with the left and right cutting blade portions 21L and 21R can be made. Next, it is possible to mow more stably by aligning the plant height with the front cover and aligning the cutting surface. For example, when a person holds a sickle with his right hand and mows the grass with his left hand, he grabs the grass together and aligns the plant height, which has the same effect.

  In addition to the self-propelled three-wheel configuration, there is also the meaning of the stability of the body posture and the cutting height. It is extremely rare for the ground to be flat, and most workplaces are usually rough. The developed machine is not intended for special applications such as lawn mowers, but can supply general-purpose mowers that can be used in almost everything from gardens and golf courses to riverbeds and satoyama in all places where mowing machines can be used. The three-wheel configuration is the best in terms of stability and stability on rough terrain. Although the cutting height is also adjusted by the cutting blade pressing cap 214, it is local, and it is necessary to maintain the stability of the cutting height throughout the entire body.

  Here, the cutting blade finally used was a rod-shaped blade, with knives 211 and 212 made into a cross. This is for crossing at the center of the aircraft. If there is a gap, uncut leaves will appear, and not only will the cutting surface be dirty, but if the plant height is high (over 50 cm), work trouble will occur. This was the last wall in the new mowing method, but I found a solution this way. In the first embodiment of the present application, the left and right knives cross each other by about 2 cm at the center of the body while maintaining a rotational phase difference angle of approximately 45 °. This change in concept has made the cutting blade extremely simple. A knife is a very simple rod-shaped blade, one of which is simply shaped to a knife width and knife thickness. For this reason, it was possible to reduce the cost compared to a mass-produced disc-shaped blade for a brush cutter. The reason for crossing the knives like gears is that the blade surfaces are in the same plane. If it is just crossed, the blades for the brush cutter may be crossed in steps, but the cutting operation becomes unstable and tends to get tangled.

  As described above, the claw throw ring mowing that crosses at the center of the machine body is completed even by the rolling mowing by the pair of mowing blade portions 21. With the development of a self-propelled mower, we were able to develop a new mowing method.

  Other development items will be described with reference to FIGS. 4, 6, and 8. Of course, the cross-shaped blades formed by the two knives 211 and 212 may be integrally manufactured as a single unit, but the cost becomes very high. As a result, the cutting blade portion 21 simultaneously overlaps the main knife 211, the secondary knife 212, the discharge promotion plate 213, and the cutting blade pressing cap 214 with the cutting blade nut 215 on the output shaft (not shown) of the counter mission 6. It must be attached, and this is a rather difficult task as a task that requires centering of each part. In order to solve this problem, a manufacturing method has been developed in which the main knife 211, the secondary knife 212, and the discharge promotion plate 213, which require rotation center alignment, are centered and fixed in advance and attached to the output shaft.

  FIG. 4 shows the assembling method. The upper figure is a completed bottom view, and the lower figure is a top perspective view with an assembly jig W inserted. After inserting each into the alignment axis | shaft (lower side of a cylinder main body in the figure) of the jig | tool W of the same diameter as the screw part (illustration omitted) of the output shaft front-end | tip of the counter mission 6, it is a simple thing fastened with four screws. A cross shape has four screw positions. The stay that comes out from the side surface of the cylinder of the jig W and is inserted into the alignment hole of the discharge promotion plate 213 is an alignment mark for determining whether the cutting blade portion 21 is for the left side or the right side.

  In addition, the cutting blade pressing cap 214 is configured such that the height of the recess in which the cutting blade nut 215 enters is made higher than the nut thickness so as to function as a nut guard. The nut guard prevents the wear of the nut and is used exclusively for the riding type. The mowing blade of this machine is indispensable because it rotates at high speed with the engine speed (about 9000 rpm) as it is like the mower.

  Furthermore, the anti-scattering cover 22 of the cutting part 2 can be fixed in the up-and-down position for maintenance during work. A cross-rolling mowing method has been developed to change the conventional mowing concept and is a new mowing machine with high work efficiency and high stability. However, the entanglement of mowing grass still cannot be completely eliminated. This is also the fate of a general-purpose machine that cannot select the grass species. FIG. 6 shows a state where the cover 22 is raised. If the upper side of the pipe housing of the counter mission 6 is fully raised, the cutting blade portion 21 is exposed entirely, so that the entangled mowing grass can be easily removed. It differs greatly from opening a part of a cover or removing a part, like a conventional riding type and a beard mowing type. A simple configuration that makes it easy for anyone to do so has made this possible.

  As described above, we have developed a completely new mower using the new “claw slow ring mowing” method. We have developed a machine that anyone can follow easily and cheaply and can be operated easily by anyone, elderly people, and women, such as a mower that has been widely used. As a working machine like a conventional machine, we have developed not only a swinging blade but also a cutting method suitable for mowing based on the results obtained from many R & D tests. A machine that doesn't make a profit is a work machine, but it is indispensable for harvesting the next crop, improving the living environment of living, and improving the natural environment. And the work is more of an elderly or female girl who has retired from the front line rather than a front-line active generation job. This trend will become increasingly strong for the elderly society. The invention of the present application will make a significant contribution in this field not only as work sharing with the active generation, but also as a corner for future social participation of the senior generation.

In the present invention, two cutting blades are crossed and arranged on the same surface, but more than that, three or more cutting blades can be arranged side by side. However, it is necessary to use an even number of cutting blades for cross rolling. Based on the principle of the present invention, a medium and large-sized mowing machine with high work efficiency is also possible. In addition, the cutting blade employs two knives made in a cross shape, but three or more knives that are crossed in multiples may be used. FIG. 10 shows a six-letter cloth cross cutting blade made as a prototype. A blade with the same outer diameter as that for the brush cutter in the development machine of the present application is sufficient in a cross shape. This is effective when the outer diameter of the cutting blade is increased to make a medium-sized or large-sized machine.

The widespread development of cross-rolling mowing brings great innovation to mowers that look mature and have not changed for many years.

It is a right perspective view which shows the mowing machine of 1st Example of this application. It is a left view which shows the basic frame structure of the mowing machine of 1st Example of this application. It is a front view which shows the mowing machine of 1st Example of this application. It is the bottom view (upper figure) of the cutting blade part of the 1st Example mowing machine of this application, and the top perspective view (lower figure) which shows an assembly state. It is a perspective view which shows the scattering prevention cover of a mowing of the mowing machine of 1st Example of this application. It is a right perspective view which shows the state which raised the scattering prevention cover along the housing of the 1st Example mowing machine of this application. It is a plane perspective view for demonstrating the cross rolling mowing of the mowing machine of 1st Example of this application. It is the lower view which lifted and looked forward of the mowing machine of 1st Example of this application. It is a bottom view of the cutting-blade part of the 2nd Example mowing machine of this application.

DESCRIPTION OF SYMBOLS 1 Engine 2 Cutting part 21 Cutting blade part 211 Main knife 212 Secondary knife 213 Discharge promoting plate 214 Cutting blade pressing cap 215 Cutting blade nut 22 Scatter prevention cover 221 Discharge promotion bar 222 Scatter prevention side cover 223 Side guard plate 3 Traveling drive rear wheel 4 Front wheel 5 Traveling mission 6 Counter mission 7 Handlebar 8 Front cover 9 Main cover W Cutting blade assembly jig

Claims (5)

  In a self-propelled self-propelled mower with three or more wheels, which is equipped with a prime mover such as an engine or a motor and drives a rotary cutting blade and a traveling drive wheel, a rod-shaped blade is configured in a cross or multiple cross shape The mowing part, which is made up of the main parts of the mowing blade, mowing grass discharge promotion plate, mowing blade presser cap, and mowing grass scattering prevention cover, is placed on the running surface between the front and rear wheels. Next, the rotation phase difference angle is set so that the cutting blades overlap in the same plane from the outer side in the left and right direction of the fuselage to the substantially central part inside the fuselage, that is, the rod-shaped blades do not collide with each other. A mowing machine characterized by being provided to rotate in a cross-rolling manner like a gear while keeping the same.   A plate-like front cover that covers the plane projection surface of the mowing part is provided directly above the mowing part so that the edge in the forward direction of the machine body protrudes forward from the outer periphery of the rotating mowing blade. The mower according to claim 1   Of the cutting part components, the rod-shaped blade and the discharge plate are assembled so that the rotating cores are aligned by an assembling jig before mounting the machine body, and then assembled to the rotary shaft of the rotary cutting blade of the machine body. A mowing machine according to claim 1 or 2.   The mowing machine according to any one of claims 1 to 3, wherein a height of the hook-shaped portion to which the nut is attached of the cutting blade pressing cap is set to be equal to or greater than a thickness of the mounting nut.   The mowing machine according to any one of claims 1 to 4, wherein the self-propelled self-propelled configuration is a three-wheel self-propelled self-propelled configuration in which two driving rear wheels and one front wheel are provided at a substantially front center.