DE202019104532U1 - Brushcutter and associated holding device - Google Patents

Abstract

A brushcutter comprising a longitudinally extending main body (2), in turn comprising a support bar (10), at the opposite ends of which are respectively housed a motor (12) and a tool (14) for mowing and in the middle region thereof a handle (16) the brush handle comprises a holding device (5), characterized in that the holding device comprises at least one spacer (30) which supports a ground support at a predetermined distance from a point (45). provides where the handle (16) is located or is located between the handle and the motor.

Description

The present invention relates to a brushcutter and an associated holding device.

STATE OF THE ART

Brushcutters are known in the art which are provided with a support bar at each of whose opposite end portions a motor, generally an internal combustion engine or an electric motor, and a cutting head are mounted, which are normally adapted to mow grass or cut hedges. This type of brushcutter provides, in some cases, replaceable cutting heads to enable them to switch from grass mowing to hedge trimming or other functions. The tendency is actually to be able to carry out various work with a single tool, which is why brushcutters with various types of interchangeable heads are spread, which include, for example, saws, scissors, etc. In the context of the present invention, brushcutters are all these types of tools, regardless of the type and cutting specialization of the head or its current and future exchange possibilities.

This type of brushcutter has a handle located in a middle position of the rod, slightly closer to the engine than the head, to compensate for the greater weight of the former and thus reduce the oscillating action. Nevertheless, the use is not very convenient, as the weight of the tool is considerable and its rearward placement also forces the operator to have too few ergonomic positions and turns of the upper body.

As is known, persons with back problems, u. a. Disc problems, discouraged from using this type of tool, and use of the same over a longer period of time, even in healthy individuals leads to pathologies.

To alleviate this problem, a strap hinged to the handle is generally attached. The operator puts on the shoulder strap belt on which the brushcutter hangs suspended on its side. This system creates a fulcrum that can be used to handle the brushcutter that rests on the shoulders but not on one of its arms. The weight load on the operator's body, however, is still asymmetrical; In addition, the strap, whose length remains fixed during work, hinders the radius of action of the brushcutter due to the fact that it has to be adapted to the size of the operator. It is not unusual, therefore, for the belt used to sell a brushcutter not to be used by the users.

As an alternative to the type described above, those brushcutters have found widespread use, whose motor is accommodated in a backpack carried by the user on the shoulders. However, this solution is still today commercial brushcutters, d. H. the upper price category reserved. In addition, the weight of the engine - albeit symmetrically better distributed - still bears on the operator and is therefore only partially able to prevent the problem of back diseases.

The general purpose of the present invention is to solve all or part of the problems of the known art.

A preferred general purpose of the present invention is to provide a brushcutter that is easy and convenient to use and capable of alleviating or eliminating operator back problems in both short and long term use.

Another preferred purpose of the invention is to provide a brushcutter capable of realizing both high cost and low cost tools.

Another preferred purpose of the invention is to provide an adaptation system in order to be able to easily convert the currently existing brushcutters into a brushcutter according to the invention.

GENERAL INTRODUCTION

In a first general aspect, the present invention relates to a brushcutter comprising a longitudinally extending main body, in turn comprising a support rod, at the opposite end portions of which a motor and a tool for mowing are housed and in the central region of a handle is arranged, as the Handle closer to the engine than the tool is arranged, the brushcutter comprises a holding device, which is characterized in that the holding device comprises at least one spacer which provides a ground support at a predetermined distance from a point at which the handle is located or the between the handle and the engine.

Advantageously, the weight of the brushcutter fully rests on the ground in an equilibrium point of the tool, so that the Operator has to expend little force to operate it.

According to some particularly advantageous embodiments, this point, which is at a predetermined distance from the ground, a pivot point between the main body and the holding device.

The fulcrum defines an oscillating axis which, in the working position, is substantially parallel to the ground, preferably at right angles to the carrier bar.

The pivot point is in proximal position to or on the main body.

In this way, the freedom of movement about the pivot point spaced from the bottom advantageously allows maximum convenience in use. So it is possible, for example, to mow slopes while maintaining the ground support.

In addition to the swinging movement, it is particularly advantageous to expand the handling clearance by providing a tilting axis between the holding device and the main body, at right angles only swinging axis. In this way it is possible to adjust the cutting inclination. Preferably, the cutting inclination axis is parallel or coincident with the longitudinal extension line of the main body.

According to a general, particularly preferred feature of the invention, the main body is supported on a holding device, preferably suspended at the pivot point, when the holding device rests on the ground.

According to some particularly preferred embodiments of the invention, the holding device comprises at least the spacer and a coupling portion for coupling to the main body, which are arranged on opposite sides with respect to the main body, and a bypass portion of the main body to connect the spacer and the coupling portion with each other , It should be noted that the coupling section is to be understood as a connection section which can be disengaged from the main body and which is intended to remain fixed, for example in one piece, with it.

It may be provided that the bypass section has an elastic suspension to dampen the vibrations during use.

According to some preferred embodiments, the coupling portion comprises at least one pivot and at least one seat therefor arranged to define a swing axis, the main body including a collar rotatably disposed about the support bar to define a cutting slope axis perpendicular to the axis of rotation Swinging axis extends, wherein the collar is provided with a positionable above the rod flange and has a slot, wherein the pivot pin passes through the slot.

A particularly preferred example of a brushcutter has all of the aforementioned features, and the bypass section further comprises a pair of resiliently elasticated flanges facing each other and shaped to define therebetween a passageway for the support bar without contact therewith the flanges protrude to define the coupling region by holding the collar flange therebetween by means of a pivot pin, the elastic flanges and the collar flange having aligned openings through which the pivot pin passes, the resilient flanges being further above the pivot pin and collar flange protrude to form a slot for coupling a shoulder support belt for the brushcutter, wherein the elastic flanges are preferably lockable in a working configuration in which they receive the pin, and are unlockable to be spread apart at least at a distance, which ausrei to be able to pass the support bar between them when it is inserted or pulled out into the passage area; below the elastic flanges, the support bar is arranged, which is preferably lockable and unlockable by a in the working configuration and the folded-back configuration, wherein the holding device optionally includes an additional anchoring element which is arranged between the handle and the tool to the folded support rod parallel to To hold the carrier rod.

According to some particularly simple embodiments, the spacer is a support bar directed from the main body to the floor.

For example, the length-adjustable rod includes 30 preferably at least two tubular sections 30a and 30b which are telescopically displaceable relative to each other and lockable to each other at an arbitrary point of a series of points.

Preferably, the brushcutter comprises an extension connectable to the rod, the structure of the rod and its extension corresponding to a series of tubes which can be subdivided into two compatible groups, the first group having an outer diameter displaceable with the inner diameter of the second group can be coupled.

Preferably, the tubes are mutually displaceable lockable by means of retractable buttons, which optionally engage in corresponding holes.

According to some preferred embodiments, the rod and / or extension have an adjustable length by locking the tubes to each other in the desired positions by means of retractable buttons arranged to engage in a bore selected from a series of holes.

According to a general, preferred feature of the invention, the holding device can be folded back between a working position and a rest position, the holding device preferably comprising a return point separated from the oscillating axis, preferably below the same.

This makes it possible to clean up the tool to save space or to use it without the holding device.

According to a second aspect, the invention relates to a holding device for brushcutter of the type specified, even if it is sold independently of the brushcutter, for example in the form of an attachable in brushcutter of the known type sets.

Thus, for example, a holding device is conceivable which can be coupled into the brushcutter and disengaged, more preferably with a coupling ring for the belt of a brushcutter of known type einkuppelbar and disengageable.

According to a third aspect, the invention relates to a set for brushcutters, comprising a support rod and an extension thereof of the type described above.

list of figures

• - 1 eine erfindungsgemäße Motorsense mit der Stützstange in Arbeitskonfiguration;
• - 2 die Motorsense aus 1 mit der Stange in schräger Konfiguration;
• - 3 die Haltevorrichtung der Motorsense aus den vorbenannten Figuren mit der auf dem Boden aufliegenden Stützstange;
• - 4 einen Kupplungsabschnitt der Vorrichtung aus 3 zur Kupplung an die Trägerstange der Motorsense im vorderen Aufriss;
• - 5 entspricht 4, aber in Seitenansicht;
• - die 6 und 7 eine Variante des Kupplungsabschnitts aus 4, jeweils in einer geschlossenen und geöffneten Konfiguration dargestellt;
• - die 8 und 9 die Rückklappvorrichtung der Haltevorrichtung aus den vorigen Figuren;
• - die 10 und 11 eine Variante der Haltevorrichtung;
• - die 12 und 13 eine Verlängerung der Haltevorrichtung, die beispielsweise als Heckenschere oder Baumsäge geeignet ist. 13 zeigt eine Explosionsansicht aus 12.

Other features and advantages of the invention will be apparent from the following detailed description of the preferred embodiments thereof, taken in conjunction with the accompanying drawings, which are for purposes of illustration only, and not of limitation. Show it:

• - 1 a brush cutter according to the invention with the support rod in working configuration;
• - 2 the brushcutter off 1 with the rod in an oblique configuration;
• - 3 the holding device of the brushcutter from the aforementioned figures with the resting on the floor support rod;
• - 4 a coupling portion of the device 3 for coupling to the carrier rod of the brushcutter in the front elevation;
• - 5 corresponds to 4 but in side view;
• - the 6 and 7 a variant of the coupling portion 4 , each shown in a closed and opened configuration;
• - the 8th and 9 the folding-back device of the holding device from the previous figures;
• - the 10 and 11 a variant of the holding device;
• - the 12 and 13 an extension of the holding device, which is suitable for example as a hedge trimmer or tree saw. 13 shows an exploded view 12 ,

With reference to the 1 and 2 a brushcutter according to the invention is shown, which in its entirety with the reference number 1 is marked. It comprises a main body 2 and a holding device 5 ,

The main body extends longitudinally along an axis 80 ,

In the example shown, the main body 2 a brushcutter of known type and the holding device can be coupled into and disengaged from it in order to form the brushcutter according to the invention. Not excluded, however, is the production of fixedly coupled into the holding device or integral with her engine brushcutters.

The main body 2 includes one along the axis 80 longitudinally extending support bar 10 at the ends of which is an engine 12 and a trim tool 14 , For example, a classic thread head or a cutting disc are arranged.

Between the engine and the tool is a closer to the former than the second-mentioned arranged handle 16 , The handle preferably comprises a first and a second gripping zone 17 . 18 so that the brushcutter can be held with two hands, with one of the two zones an operating element 19 For the engine, generally includes a throttle to accelerate or slow down the engine.

On the carrier bar 10 is between the two gripping zones 17 and 18 A bunch 20 ( 5 ) arranged with at least one slot 22 to the Engage a belt 25 is provided. The slot is a flange 23 executed, the above the support rod 10 protrudes. The strap can be placed over the shoulder, leaving the familiar brushcutter 2 can be worn suspended from it.

If the known brushcutter 2 with the holding device 5 is coupled, the slot is 22 advantageously used for such engagement, as will be explained below.

The Bund 20 is preferably around the pole 10 rotatable, so that also the flange 23 this rotation follows. The Bund 20 So defines a tilt axis 80 of the main body with respect to the holding device which, in the working configuration, allows adjustment of the cutting inclination with respect to the ground, as indicated by the arrows R2 is shown.

With reference to 3 includes the holding device 5 essentially a support bar resting on the ground 30 acting as a spacer between the brushcutter 2 and the floor, a coupling section 32 for coupling to the main body, a bypass section 34 of the main body and a folding-back device 36 , Optionally, the rod can 30 include several sections for length adjustment with one or more telescoping mechanisms 38 are connected.

Preferably, the rod comprises 30 at least two tubular sections 30a and 30b which are telescopically displaceable relative to each other and lockable to each other at an arbitrary point of a series of points. The definition of the points and the blocking take place, for example, by means of at least one retractable button 31 which is fixedly connected to one of the two tubes and arranged to selectively into a hole of a series of holes 33 to latch on the other tube, in the longitudinal direction of the rod 30 are arranged spaced from each other.

The first pipe 30a distal to the main body 2 , slides separable inside the second tube 30b the latter being proximal and preferably not from the main body 2 is separable.

In the 12 and 13 is an extension 37 shown on the pole 30 attachable and a third and a fourth pipe 30c and 30d includes, like the pipes 30a and 30b are telescopically movable and lockable.

In particular, the third tube 30c is capable of being lockable and separable inside the proximal tube 30b to be moved. The third pipe 30c is also inside the fourth tube 30d movable and lockable. The fourth pipe 30d in turn is open at both ends to engage by displacement of both the first tube 30a as well as the third pipe 30c to allow in its interior. The third pipe 30c preferably has retractable buttons at least at its two ends 31 on to its displacement both in relation to the proximal tube 30a as well as in relation to the fourth tube 30d to lock.

In use, the foot becomes 30a from the proximal tube 30b pulled out and through the third tube 30c replaced when moving with a retractable knob 31 locked in the desired position. The fourth pipe 30d gets into the third pipe with one end 30c plugged in and with a second retractable button 31 locked in the desired position. The foot 30a is plugged into the other end of the fourth tube and with a retractable button 31 locked in the desired position.

The extension 37 is in this case between the starting pipes 30a and 30b and the pole 30 arranged.

In general, the structure of the rod consists 30 and their extension 37 of a series of tubes which can be subdivided into two groups compatible with one another on the basis of the diameter, the first group having an outer diameter which can be coupled with the inner diameter of the second group in a displaceable manner. The pole 30 and / or the extension have an adjustable length by blocking the tubes to each other in the desired positions, for example by means of retractable buttons arranged to lock in a hole selected from a series of holes.

It is therefore understood that the number of tubes as well as the order of the shots may differ from the illustration shown here. For example, if the first pipe 30a on both ends with retractable buttons 31 it is not necessary to remove it from the second tube 30b pull out to the extension 37 to attach, which just to the stop on the rod 30 can be plugged.

With reference to the 4 and 5 are the support rod 30 and the coupling section 32 on the opposite sides of the carrier bar 10 arranged, which by means of bypass section 34 is overcome. In this way, the support bar is, albeit below the support bar 10 located at this and in particular at the Federal Government 20 "Hung". It is also conceivable that the main body 2 on the support bar 30 is suspended when it rests on the ground in the working configuration.

The illustrated bypass section 34 includes a pair of molded flanges 40 , which are preferably provided with elastic springs. Their shape is such that they provide a passageway for the support bar between them 10 define without touching them.

The flanges 40 extend to the coupling section 32 to define where they are closer to each other and between them the flange 23 of the federal government 20 hold. The holding is done thanks to a pivot pin 45 passing through the slot 22 and respective aligned slots 46 of the flange 40 passes. The flange 23 The covenant can be between the flanges 40 free around the pivot pin 45 turn a pivot between the main body 2 and the holding device 5 Are defined. The main body 2 So it can be like a lever around one through the pivot pin 45 defined axis 82 swing, which is the swing axis.

The swing axle 82 is in working configuration substantially parallel to the ground and perpendicular to the pitch axis 80 ,

Also referring to the work configuration 1 is the support bar 30 on the ground and thus serves as a spacer, which is the fulcrum 45 stops at a predetermined height from the ground.

The flanges 40 can get over the coupling section 32 Continue to extend to another slot 50 for engaging a belt 25 conventional way of defining. Advantageously, the belt is no longer used to carry the brushcutter constantly, but only in emergencies, for example, during transport to the workplace.

In the embodiment shown, the flanges 40 the wings of a single, forked or closed ring shaped flange.

In the 6 and 7 a variant is shown in which the same or similar elements as the previous ones are marked with the same reference numbers. In particular, a preferred general feature is shown in which the flanges 40 are separable from each other to the insertion of the support rod 10 in the bypass zone 34 to facilitate. The easily executable example shown here allows the flanges 40 at least so far apart that the carrier bar 10 can be introduced. The flanges 40 are for example by a snap mechanism 52 separable and joinable, the above the long hole 22 is arranged.

With reference to the 8th and 9 is the return device 36 shown comprising a rotary hinge 60 and a locking and unlocking device 62 , The return device allows the support bar 30 out between work configuration 1 in which the fulcrum 45 remains at the predetermined working height, and to move the resting configuration in which the support rod 30 and the carrier bar 10 are essentially parallel. Around the support bar 30 to hold in the resting configuration is a receiving element 65 provided on the support rod 10 between the tool 14 and the handle 16 is arranged. The receiving element ensures, for example, the blocking and the release of the snap bar 30 ,

In the 10 and 11 an alternative embodiment of the holding device according to the invention is shown, wherein parts which are the same or similar as the preceding parts, with the same reference number or the same, but by 100 or increased by a multiple thereof reference number.

The device 105 These figures differ from the device described above 5 in that the fulcrum 45 and the support bar 30 both on the same side of the carrier bar 10 are.

In particular, the fulcrum is located 45 in a ball joint 70 that is below the carrier bar 10 is arranged.

In this case, so go both the swing axis 82 as well as the cutting pitch axis 80 through the same fulcrum.

It is therefore understood that the main body is no longer suspended from the pole, but rests on it. This embodiment is conceivable because it relieves the operator of the weight of the brushcutter; however, it is less preferable because it is less practical in handling than the previous embodiment due to the position of the cutting inclination axis m fulcrum; in particular, the brushcutter tends to tilt spontaneously to the side while in the previous version it is inclined only by the operator's manipulation.

The coupling of the device 105 on the skin body, for example by means of a tape 68 or an openable jaw which holds the carrier bar 10 clamps.

In use, the operator brings the carrier bar 30 into the working configuration below the main body 2 the brushcutter and places it on the ground to support the weight. The brushcutter can easily be turned to the left and right around a support point on the ground with the typical mowing motion, since the soil friction is minimal. The brushcutter also has the ability to rotate around the axis 82 to swing, as by the arrows R1 is shown to the tool 14 raise or lower, so that can be mowed on slopes. The swing also allows easy forward and backward movement of the brushcutter without losing ground contact. Finally, the rotation of the covenant allows 20 or the ball joint 45 the lateral inclination of the brushcutter, and consequently of the tool, to obtain the desired cutting slopes, as indicated by the arrows R2 is shown. Namely, the collar and / or the ball joint define the cutting inclination axis coincident or parallel to the axis 80 runs, which in turn like the pole 10 aligned and perpendicular to the swing axis 82 is.

In summary, it has been shown that the present invention allows to maintain all the handling capabilities of a conventional brushcutter, while at the same time relieving the operator of its weight.

GENERAL INTERPRETATION OF TERMS

In understanding the purpose of the present invention, the term "comprising" and its derivatives, as used herein, are to be understood as open-ended terms that set out explained features, elements, constituents, groups, integers, and / or phases without excluding the presence of other unexplained features, elements, components, groups, integers and / or phases. This also applies to the words that have similar meanings as the terms "include", "have" and their derivatives. In addition, the terms "parts", "cross section", "section", "member" or "element" when used in the singular may have the dual meaning of a single part or a plurality of parts. As used herein to describe the above embodiment, the directional terms "forward", "backward", "upper", "lower", "vertical", "horizontal", "lower" and "transverse" refer to , as well as all other, similar directional terms on a brushcutter in operating position. As used herein, significant terms such as "substantially," "about," as used herein mean a significant departure from the changed term such that the end result is not significantly changed.

While embodiments have been chosen to illustrate the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as set forth in the following claims. For example, the sizes, shapes, positions or orientation of the various components may be changed as desired and / or required. The shown, directly connected or contacting components may have intermediate structures therebetween. The functions of one element can be exercised by two or more elements or vice versa. The structures and functions of one embodiment may be applied in another embodiment. It is not necessary to combine all the advantages in a particular embodiment at the same time. Any original feature compared to the known technique alone or in combination with other features should also be considered in a separate description of other inventions of the applicant, including the structural and / or functional concepts contained in those features. Therefore, the foregoing descriptions of the embodiments of the present invention are by way of illustration only and are not intended to limit the invention as defined in the appended claims and their equivalents.

Claims (15)

A brushcutter comprising a longitudinally extending main body (2), in turn comprising a support bar (10), at the opposite ends of which are respectively housed a motor (12) and a tool (14) for mowing and in the middle region thereof a handle (16) the brush handle comprises a holding device (5), characterized in that the holding device comprises at least one spacer (30) which supports a ground support at a predetermined distance from a point (45). provides where the handle (16) is located or is located between the handle and the motor. A brushcutter as claimed in the preceding claim, characterized in that such point (45) at a predetermined distance from the ground is a fulcrum between the main body and the fixture defining an oscillating axis (82) between the two. Brushcutter after Claim 2 , characterized in that it comprises a cutting inclination axis (80) between the holding device and the main body, wherein the inclination axis is perpendicular to the swing axis (82). Brushcutter according to one of the preceding claims, characterized in that the Main body (2) is suspended from the holding device (5) is worn when the holding device rests on the ground. A brushcutter according to the preceding claim, characterized in that the holding device (5) comprises at least the spacer (30) and a coupling portion (32) for coupling to the main body, which are arranged on opposite sides with respect to the main body (2, 10) , and a bypass portion (34) of the main body to connect the spacer (30) and the coupling portion (32) with each other. Brushcutter after the Claim 5 characterized in that the coupling portion (32) comprises at least one pivot (45) and at least one receiving seat (46) therefor, arranged to define a pivot axis (82), the main body comprising a collar (20), which is rotatably mounted about the support bar (10) to define a cut inclination axis perpendicular to the swing axis, the collar being provided with a flange (23) positionable above the bar (10) and having a slot (22) the pivot pin passes through the slot. A brushcutter as claimed in any preceding claim, characterized in that the bypass section (34) further comprises a pair of resiliently elasticated flanges (40) facing each other and shaped such that there is a passage area for the support bar (10) without contact therebetween are defined, wherein the flanges project to define the coupling portion (32), in which between them by means of pivot pin (45) of the flange (23) of the collar (20) is held, wherein the elastic flanges (40) and the collar flange (23) each have aligned openings (46, 22) through which the pivot pin (20) passes, wherein the elastic flanges above the pivot pin and the collar flange further protrude to a slot (50) for coupling a shoulder strap (25) for the To form brushcutter, wherein the elastic flanges are preferably lockable in a working configuration and are unlockable to spread at least at a distance t to be sufficient to allow the carrier bar (10) to pass between them when being inserted or withdrawn into the passageway area; below the elastic flanges is disposed the support bar (30) separated therefrom by a returnable locking device (36) which is lockable and unlockable in the working configuration and the folded back configuration, the holding device optionally including an additional anchoring element (65) disposed between the handle (16) and the tool (14) is arranged to keep the folded-back support rod (30) parallel to the support rod. Brushcutter according to one of the preceding claims, characterized in that the spacer is a support rod (30) which is directed from the main body (2) to the ground. Brushcutter according to the preceding claim, characterized in that the rod (30) is adjustable in length and in particular comprises at least two tubular sections (30a and 30b) which are telescopically displaceable relative to each other and lockable to one another at any point of a series of points. Brushcutter after the Claim 9 characterized in that it comprises an extension (37) connectable to the rod (30), the structure of the rod (30) and its extension (37) being a series of tubes (30a, 30b, 30c, 30d) which can be subdivided according to their diameter into two mutually compatible groups, the first group having an outer diameter which is slidably coupled to the inner diameter of the second group. Brushcutter after the Claim 10 , characterized in that the tubes are displaceable relative to each other by means of retractable buttons which engage selectively in corresponding holes. Brushcutter after the Claim 11 characterized in that the rod and / or the extension have an adjustable length by locking the tubes to each other in the desired positions by means of retractable buttons arranged to engage in a bore selected from a series of holes. Brushcutter according to one of the preceding claims, characterized in that the holding device (5) can be folded back between a working position and a rest position, wherein the holding device preferably comprises a return fold point (60) separate from the swing axis (45), preferably below the same. Brush cord holding device of the type specified in any one of the preceding claims. A brushcutter set comprising a support bar and an extension according to any one of claims 8 to 13.

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