FR2644031A1 - Apparatus intended to be held manually forming a mower with a rotary blade driven electrically for cutting grass in complete safety and in particular in places of difficult access - Google Patents

Abstract

Apparatus intended to be held manually forming a mower with a rotary blade driven electrically for cutting grass in complete safety and in particular in places of difficult access, characterised in that it consists of a cutting blade 2 turning in a protection housing 1, of a tube 4 forming a handle, in which a transmission shaft 5 passes, at the upper end of which holding means are arranged, which make it possible to receive a driving motor; said means comprises on the one hand a handgrip 8 arranged transversely in front of the motor block so as to be spaced by approximately 110 to 120 mm in relation to the axis of the handle and close to the centre of gravity of the whole, and on the other hand a handgrip 9 arranged perpendicularly or obliquely in relation to the axis behind the handgrip 8, and in the lower part of the motor. In the event of utilisation of a low tension direct current motor, the supply can be effected by means of a storage battery fixed to a belt 12 worn by the user, thus allowing considerable autonomy.

Description

 Apparatus intended to be held manually forming a rotary blade mower electrically driven for cutting grass safely and in particular in places with limited accessibility.

 The device consists of a cutting blade (2) rotating in a semi-circular protective housing (1) open at the front for the passage of the grass to be cut.

 A tube (4) serving as a handle and comprising at each end a bearing (7).

 A shaft fitted with a hose (3) ensuring the rotation of the cutting blade (2) and passing through the tube (4).

 On the engine part, distinguished in three variants "a" "b" and "c".

comportant chacune d'un côté une patte qui traversée par un axe, forme transversalement une poignée (8), ces flasques (10) servant de machoires pour la fixation d use perceuse électrique portative, le blocage se faisant par deux vis (13) et écrous papillon (14).The variant "a" consists of two parallel flanges (10) forming

each comprising on one side a lug which passes through an axis, transversely forms a handle (8), these flanges (10) serving as jaws for fixing a portable electric drill, the blocking being done by two screws (13) and wing nuts (14).

 The shaft (5) projecting from the tube (4) for clamping in the drill chuck.

comportant chacune d'un côté une patte qui traversée par un axe, forme transversalement une poignée (8); une poignée centrale (9) perpendiculaire à la poignée (8) et comportant un interrupteur de commande du moteur, adapté à l'arrière des flasques (10); les flasques (10) servant de machoires pour la fixation d'un bloc moteur standard électrique à courant alternatif ou continu, la fixation se faisant par deux vis (13) et écrous papillon (14).Variant "b" consists of two parallel flanges (10) forming

each comprising on one side a tab which, crossed by an axis, transversely forms a handle (8); a central handle (9) perpendicular to the handle (8) and comprising a motor control switch, adapted to the rear of the flanges (10); the flanges (10) serving as jaws for fixing a standard electric motor unit with alternating or direct current, the fixing being done by two screws (13) and wing nuts (14).

 The shaft (5) projecting from the tube (4) being connected to the motor by a coupling sleeve.

 The variant "c" consists of a casing (11) comprising at the front a handle (8) identical to the variants "a" and "b", and at the rear a handle (9) perpendicular to the handle (8 ), and comprising an engine control switch; the interior of this casing is arranged to receive an electric motor with alternating or direct current.

 Each of the variants "a" b "and" c "is intended to be mounted at the end of the tube (4), and to receive a magnetic friction clutch or the like intended to protect the hose (3) by playing the role of limiter. torque in case of blockage of the cutting blade (2).

 In the case of using a low voltage direct current motor, the power supply can be done by means of an accumulator battery fixed to a belt (12) worn by the user.

 The handle (8) being close to the center of gravity of the assembly, ensures good stability of the device facilitating its maneuverability without fatigue.

 The device according to the invention is clearly distinguished from existing devices and makes it possible to mow in places that are not easily accessible with current mowers; indeed these are, either of the brushcutter type with central handlebar and shoulder strap, the support of the heat engine being behind the user, spit of the electric wire mower type with single handle at the top of the sleeve, the motor being located at the base of the said handle, which requires lifting the whole wrist ;; while according to the invention the apparatus also intended to be held manually and forming a mower with an electrically driven rotary blade for cutting grass safely and in particular in places which are not easily accessible, is characterized in that it is consisting of a torque blade (2) rotating in a protective casing (1), a tube (4) forming a handle through which a transmission shaft (5) passes, at the upper end of which are arranged holding means for receiving a drive motor, said means comprise on the one hand a handle (8) disposed transversely in front of the engine block in a spaced manner for example of about 110 to 120 mlm relative to L ' axis of the handle and close to the center of gravity of the assembly, and on the other hand a handle (9) disposed perpendicularly or obliquely pat relative to the axis of the tube (4 forming a handle behind the handle (8) and lower part of the engine.

-et comportant chacune une patte supérieure avant qui est traversée en bout par un axe formant transversalement la poignée (8); les dites flasques formant machoires pour la fixation d'un ensemble moteur indépendant tel que perceuse électrique portative, àpoignée arrière inférieure (9) intégrée, le serrage se faisant par deux vis transversales et deux écrous papillon (13) et (14) reçus dans des orifices (15) situés dans les extrémitées hautes et basses des flasques. According to a first embodiment, the means for holding the engine block consist of two parallel flanges (10) forming

-and each comprising a front upper tab which is crossed at the end by an axis transversely forming the handle (8); the said flanges forming jaws for fixing an independent motor assembly such as a portable electric drill, with an integrated lower rear handle (9), the tightening being done by two transverse screws and two wing nuts (13) and (14) received in orifices (15) located in the upper and lower ends of the flanges.

et comportant chacune en avant une patte supérieure qui traversée en bout par un axe, forme transversalement la poignée (8) et de l'autre côté une poignée inférieure (9) solidaire d'une traverse inférieure reliant les deux flasques (10), perpendiculaire à la poignée (8) et comportant un interrupteur de commande do moteur, les deux dites flasques comportant à leur extrémité haute à droite et à gauche des orifices (15) de réception de deux vis transversales (13) avec écrous papillon (14) assurant le maintien d'un bloc moteur électrique simple.According to a second embodiment, the holding means, consist of two parallel flanges (10) forming

and each having in front an upper tab which is crossed at the end by an axis, transversely forms the handle (8) and on the other side a lower handle (9) secured to a lower crosspiece connecting the two flanges (10), perpendicular to the handle (8) and comprising a motor control switch, the two said flanges comprising at their upper end to the right and to the left of the orifices (15) for receiving two transverse screws (13) with wing nuts (14) ensuring maintaining a simple electric motor unit.

 According to other characteristics specific to these two embodiments: the holding means comprise a clutch (6), for example magnetic friction, playing the role of torque limiter and intended to preserve the hose (3) in the event of blockage of the cutting blade (2).

pour son accouplement au mandrin de la perceuse ou du moteur.The shaft (5) is provided with an end projecting inside the flange assembly in

for its coupling to the drill chuck or the motor.

 According to a third embodiment of the invention, the holding means are composed of a casing (11) containing a friction clutch (6) for example magnetic, to which is coupled an electric motor with alternating or direct current, and comprising at the front and above the casing a handle (8) transverse and at the rear a handle (9) perpendicular to the handle (8), this handle being provided with an engine control switch.

 According to other characteristics: The semi-circular protective casing (1) in which a cutting blade (2) rotates has at the front an opening allowing the passage of the grass to be cut, this casing having on top and in the center of the half circumference, a boss inclined towards the rear and intended to receive the tube (4) forming a handle.

 The cutting blade (2) consists of a steel blade comprising at each end a sharp part opposite to each other, this blade is pierced in its middle with fixing holes on the shaft (5) .

 The tube (4) forming a handle receives at each end a bearing (7) in which the shaft (5) for cutting control turns.

as illustrations the drawings are attached:
Figure 1 variant "a" partially shows the apparatus according to the invention in side view.

 Figure 2 variant "a" partially shows the device according to the invention in front view.

 Figure 3 variant "a" shows the housing (1) and the cutting blade in top view.

 Figures 4j 5, and 6, variant "tub" partially show the apparatus according to the invention respectively in side view, from above and in rear view.

 Figure 7 variant "c" partially shows the apparatus according to the invention in side view of the assembly.

 Figure 8 variant "c" partially shows the apparatus according to the invention in top view.

 FIG. 9 variant "c" partially represents the apparatus according to the invention in rear view along arrow F of FIG. 7.

Claims (5)

CLAIMS Device intended to be held manually forming a mower with an electrically driven rotary blade for cutting grass safely and in particular in inaccessible places, characterized in that it consists of a rotating cutting blade (2) in a protective casing (1), a tube (4) forming a handle through which a transmission shaft (5) passes, at the upper end of which are arranged holding means making it possible to receive a drive motor; said means comprise on the one hand a handle (8) disposed transversely in front of the engine block in a spacing of approximately 110 to 120 m / m relative to the axis of the handle and close to the center of gravity of the assembly , and secondly a handle (9) disposed perpendicularly or obliquely to the axis behind the handle (8), and in the lower part of the motor. Apparatus according to claim 1 characterized in that the means for holding the engine block consist of two parallel flanges forming (10) and each comprising a front upper tab, which is crossed at the end by an axis transversely forming the handle (8), the said flanges forming jaws for fixing an independent motor assembly such as a portable electric drill, tightening being done by two transverse screws (13) and two wing nuts (14) received in orifices (15) located in the upper ends at right and left of the flanges (10). Apparatus according to claim 1 characterized in that the holding means consist of two parallel flanges forming (10) and each comprising in front, an upper tab which is crossed at the end by an axis, transversely forms the handle (8), and l 'other side a lower handle (9) integral with a lower crosspiece connecting the two flanges (10) perpendicular to the handle (8) and comprising a tcur motor control interrup; the two said flanges comprising at their upper end to the right and to the left of the orifices (15) for receiving two transverse screws (13? with wing nuts (14) ensuring the maintenance of a single engine block. Apparatus according to claims 2 or 3 characterized in that the holding means comprise a friction clutch, for example magnetic, acting as a torque limiter and intended to preserve the hose (3) in the event of blockage of the cutting blade (2). 5) Apparatus according to claims 2 or 3 characterized in that the shaft (5)  is provided with an end projecting inside the set of flanges in

 for its coupling to the drill chuck or the motor. caractéPasé 6) Apparatus according to claim 1Ye'n n that the holding means are  are composed of a housing (11) containing a friction clutch (6) by  magnetic example, to which an alternating current electric motor is coupled  native or continuous, and having at the front, spaced apart from the housing, a  handle (8) transverse, and at the rear a handle (9) perpendicular  to the handle (8), this handle being provided with a control switch  of the motor  7) Apparatus according to claim 6 with DC motor, characterized  in that power is supplied by an adjusted storage battery  to a belt worn by the user.  8) Apparatus according to claim 1 characterized in that the housing (1) of  semi-circular protection in which the cutting blade turns (2)  has at the front an opening allowing the passage of the grass to be cut,  this casing having on the top and in the center of the half-circumference, a boss  inclined backwards and intended to receive the tube (4) forming a handle.  9) Apparatus according to claims 1 and 8 characterized in that the blade  cut (2) consists of a steel blade comprising at each end  a sharp part opposite one to the other, this blade is pierced in  its middle of fixing holes on the shaft (5). 10) Apparatus according to claim 1, characterized in that the tube (4)  forming a handle receives at each end a bearing (7) in which rotates  the cutting control shaft (5).