FR3079714A1 - MOTOCULTURE EQUIPMENT - Google Patents

Abstract

The invention relates to a garden equipment (1) comprising a frame (10) carrying at least one tillage tool (15), a gearbox (33) and a motor (17) rotating said tool (15). ) via said gearbox (33) and a transmission belt (18) mounted loose on two pulleys (16, 19), one in connection with the driving shaft of said motor (17) and the other in connection with said gearbox (33), the clutch being produced by application against said belt (18) tensioning means (40, 401, 402) operable by a control lever (121) disposed a handle (12) of the guide bar of said equipment (1), said tensioning means (40, 401, 402) of the belt (18) being connected to said control lever (121) via a clutch control cable (30), said garden equipment (1) comprising a protective cover (20) of said transmission belt (18). According to the invention, said clutch control cable (30) has a sheath stop (300) fixed to a support plate (22) of the protective cover (20), said support plate (22) being formed of one-piece with the protective cover (20).

Description

Cultivation equipment

1. Field of the invention

The invention relates to the field of garden equipment.

In particular, the invention relates to equipment such as cultivators, tillers, or any other equipment, in particular those with a walking driver, equipped with soil working tools and / or wheels, having a motor and a gearbox, connected by a transmission belt.

2. Prior art

Field-cultivating equipment, of the tiller type for example, for the most part comprises a tool driven by a motor.

Transmission is generally carried out through:

- a belt mounted loosely on two pulleys, one (called engine pulley) in connection with the motor shaft and the other (called receiver pulley) in connection with the gearbox and the tool, and

- a belt tensioning means, of the roller or cam type, the movement of which is controlled by a sheathed cable actuated by a clutch control lever which is connected to a handle of the guide bar of the machine.

The actuation of the clutch control lever against the handle allows, by the tension of the belt under the action of the roller, to engage the tool, the release of the clutch control lever causing the disengagement, which constitutes security for the user.

Conventionally, the gearbox and the engine are fixed to the chassis of the motor hoe. The rest of the elements (pulleys, rollers, ...) are supported by an inner cover, or first protective cover, which allows the second protective cover (belt cover), removable, to be fixed.

Conventionally, the inner cover performs several functions within the garden equipment, including in particular:

- joining to the engine;

- the positioning and the maintenance in position of the gearbox;

- the management of the spacing and in particular the spacing between the motor shaft carrying the engine pulley and the input shaft of the gearbox carrying the receiving pulley;

- the positioning and holding in position of the sheath stop of the clutch control cable which is in the form of a nozzle.

It is known in the prior art to fix the sheath stop of the clutch control cable on a support plate for the inner cover. This support plate is conventionally formed by plastic injection or by hot molding.

However, such methods prove to be relatively expensive and the support plate obtained is relatively exposed to breakage due to the shocks and vibrations that the garden equipment undergoes.

In addition, and more generally, such garden equipment has a large number of mechanical parts, which puts a strain on the weight of the equipment and can cause discomfort in use and maneuvering for a user.

Finally, the manufacture of current machines, and their disassembly in the event of a breakdown, is relatively complex and requires multiple (dis) assembly operations, which increases costs.

There is therefore a need to further optimize the design of such garden equipment.

3. Objectives of the invention

An objective of the present invention is to at least partially overcome the drawbacks of the prior art.

More particularly, an objective of at least one embodiment is to provide a garden equipment in which the fixing of the sheath stop of the clutch control cable to the inner cover is compact, reliable, economical but also simple design and assembly.

Another objective of at least one embodiment is to provide a garden equipment which comprises a reduced number of mechanical elements, which is inexpensive to manufacture and whose maintenance is easy.

Yet another objective of at least one embodiment is to implement such equipment which is lighter so as to facilitate its use but also sufficiently robust.

4. Statement of the invention

These objectives, as well as others which will appear in the remainder of the present description, are achieved with the aid of garden equipment comprising a chassis carrying at least one soil working tool, a gearbox and a motor. driving said tool in rotation via said gearbox and a transmission belt loosely mounted on two pulleys, one in connection with the driving shaft of said motor and the other in connection with said gearbox , the clutch being produced by applying against said belt tensioning means which can be operated by a control lever disposed at a handle of the guide bar of said equipment, the belt tensioning means being connected to said control lever by means of a sheathed clutch control cable, the garden equipment comprising a cover for protecting the transmission belt.

According to the invention, the clutch control cable has a sheath stop fixed on a support plate for the protective cover, the support plate being formed in one piece with the protective cover.

The invention proposes the implementation of a sheath stop plate which is formed on the inner cover of the garden equipment and which forms with the cover a single piece.

Such a plate is easy to produce while being robust.

Therefore, the solution for mounting and immobilizing the cable on the inner cover is economical and reliable.

According to one aspect of at least one embodiment of the invention, the support plate has a housing, said sheath stop being fixedly held on said support plate by a removable retaining blade disposed in said housing.

In other words, by the use of a blade slid freely in a housing of the plate, a reliable blocking of the sheath stop of the clutch control cable is guaranteed in a safe and economical manner.

Equipment maintenance is also made easier.

According to a particular aspect of the invention, said blade has a circular lumen cooperating with the sheath stop.

This blocking solution is simple and inexpensive in design.

According to a particular aspect of at least one embodiment of the invention, the support plate extends transversely to the wall of the protective cover.

According to another aspect of at least one embodiment of the invention, the support plate has a slot for inserting the retaining blade opening into said housing.

According to another aspect of at least one embodiment of the invention, the blade has two positioning teeth on two opposite edges which cooperate with opposite edges of the insertion slot.

According to another aspect of at least one embodiment of the invention, the support plate has a notch in which is housed or partially engage the sheath stop to bear against the blade.

Thus, by implementing a notch, otherwise known as a U-shaped cutout, the plate forms a sort of stirrup, which ensures reliable maintenance of the sheath stop of the control cable. clutch.

According to another aspect of at least one embodiment of the invention, the sheath stop comprises a first sheath end piece and a second end piece arranged on either side of the blade and cooperating one with the other.

The cylindrical ends which enclose the cable are joined together by screwing or snapping, for example.

According to a particular aspect of the invention, the equipment comprises screws passing through circular drums formed on the protective cover, said screws being dimensioned to protrude beyond the drums and come into contact with said belt so as to guide the latter.

According to a particular aspect of the invention, the equipment comprises first means for securing the protective cover to said motor and second means for securing the protective cover to the chassis.

Finally, the garden equipment belongs to the group including in particular:

- tillers;

- wheeled brushcutters;

- hoes;

- microbiners;

- shredder mowers;

- blowers;

- scarifiers;

- lawn aerators.

Such garden equipment has the advantage of having a limited number of parts and a reduced weight.

5. List of Figures

The invention, as well as the various advantages which it presents, will be more easily understood, in the light of the description which follows of an illustrative and non-limiting embodiment thereof, and of the appended drawings among which:

Figure 1 is a side view of a garden equipment comprising a mechanical transmission according to an embodiment of the invention;

Figure 2 is an exploded perspective view of a garden equipment according to the embodiment of Figure 1;

Figure 3 is a close-up perspective view of a protective cover of a garden equipment of the invention;

Figure 4 is a close-up side view of the protective cover of Figure 3;

Figure 5 is a detail view of the protective cover of Figures 3 and 4 showing the support plate of the sheath stop of the clutch control cable;

Figure 6 is a sectional view along the axis A-A defined in Figure 4, the protective cover;

Figure 7 is a detail view of the opposite face of the protective cover of the previous figures;

Figures 8 and 9 are views of left and right, in section along the axis AA defined in Figure 4, of the protective cover, and Figure 10 is a partial perspective view of a protective cover garden equipment of the invention.

6. Detailed description of an embodiment of the invention

An embodiment of the invention is illustrated below, treated as a simple illustrative example, and not limiting, in support of FIGS. 1 to 10.

In all the detailed description which follows with reference to the figures, unless otherwise indicated, each part is described as it is arranged when the input and output shafts of the gearbox extend parallel to the ground.

This arrangement is shown, in particular in Figures 1 and 2, which illustrate a garden equipment 1, according to an embodiment of the invention.

In this embodiment, the cultivating equipment is a cultivator.

This field-cultivating equipment 1 comprises a horizontal monobloc chassis 10 supporting a transport wheel 14 and two soil working tools 15 mounted in rotation under the latter around a transverse shaft driven by a chain 101 disposed in a casing 100.

It further comprises a gearbox 33 and a motor 17 driving the tools 15 in rotation by means of the gearbox 33 and a transmission or clutch belt 18 loosely mounted on two pulleys 16, 19.

The pulley 16, called the receiver, is located at the rear of the chassis 10, above the latter. The receiving pulley 16 is itself driven by the thermal engine 17, located at the front of the chassis 10. The motor shaft 17 carries the driving pulley 19 which is connected to the receiving pulley 16 by the transmission belt 18.

Note that, in this embodiment, the motor shaft 17 and the motor pulley 19 have the same axis A1.

The clutch is produced by application against the belt 18 of tensioning means 40, 401, 402 which can be operated by a control lever 121 disposed at the level of a handle 12 of the guide bar of the garden equipment 1.

In this embodiment, the guide bar comprises a handlebar 11 at the end of which are the handles 12 carrying in particular an accelerator or gas control lever.

As already described above, the garden equipment 1 in particular comprises a gearbox 33 between the engine 17 and the tools 15 which allows the tools to change gears and / or to reverse. These changes in speed are useful, for example, in adapting the speed of the garden equipment 1 to the nature of the soil to be worked. Reverse gear makes it easier to maneuver the garden equipment 1, without excessive effort for the user.

The axis of the receiving pulley 16 is integral with the input shaft of the gearbox 33. It is noted that the receiving pulley 16 and the input shaft of the gearbox 33 have the same axis A2. The gearbox 33 is controlled by means of a gear selection lever 123 (visible in FIG. 1). Each position of the speed selection lever 123 corresponds to a predetermined transmission ratio.

Since the belt 18 is loosely mounted between the receiving pulleys 16 and the motor pulley 19, the driving of the motor pulley 19 can only be carried out by tensioning the belt 18 by means of a roller 401 for placing the belt 18 (called also "tensioner roller") which rests on it.

In FIGS. 1 and 10, this roller 401 is not in a position of contact with the belt 18.

As illustrated in particular in FIGS. 1 and 2, the roller 401 is mounted at one end of a lever 40, the latter being pivotally articulated about an axis 402, and connected to the end of a control cable d clutch 30 under sheath, itself connected to the clutch control lever 121.

The clutch control lever 121 is located near the right handle 12 of the handlebar 11 for operating the equipment and can pivot to take several positions. The passage from the first position (low, that is to say vertical) to the second position (raised towards the handle 12) causes the tensile stress of the clutch control cable 30.

The tightening of the clutch control lever 121 against the handle 12 allows, by the tension of the belt 18, to engage the tools 15, its loosening causing the disengagement, which constitutes a safety for the user. More precisely, the bringing together of the clutch control lever 121 allows traction on the clutch control cable 30, and therefore the pivoting of the roller 401 in contact with the belt 18, which causes the tension of the belt 18. The roller 401 causes the belt portion 18 between the two pulleys 16 and 19 to bend inwards.

In a conventional manner, the gearbox 33 and the motor 17 are fixed to the chassis 10 of the motor hoe 1. The rest of the elements are supported by a protective cover 20.

It should be noted that the protective cover 20 also makes it possible to fix a second protective cover or removable belt cover 24 making it possible to form, at least in part, a protective assembly.

In this embodiment, the protective cover is made of plastic.

Advantageously, as will be described in detail below, the protective cover 20 comprises a support plate for the sheath stop of the clutch control cable 30 which is formed integrally with the protective cover 20 .

One could imagine other embodiments in which the protective cover is made of another material, suitable for such garden equipment.

This protective cover 20 has first securing means 171, 172 with the motor 17 and second securing means 334 with the chassis 10 which are visible in FIGS. 3, 4 and 10.

Advantageously, screws 173, 174 passing through circular drums 180 also serve to best guide the belt 18.

In other words, and as illustrated in particular in FIGS. 3, 4 and 10, two screwing drums are provided on the protective cover 20 near the motor pulley 19.

These two screwing barrels 180 cooperate with screws 173, 174 mounted opening onto these screwing barrels 180. These screws 173, 174 pass through the screw barrels 180 so that their end is located opposite the belt 18 and in contact with the latter to better guide it.

Means for securing the protective cover 20 with the belt cover 24 comprise circular holes 331, 332, 333 capable of cooperating with fixing screws.

As described above, the belt tensioning means 18 comprise an actuating lever 40 movable in rotation about an axis 402 secured to the protective cover 20, the actuating lever 40 being connected to the control lever 121 by means of cable 30.

It will be noted that the clutch control cable 30 is connected to a compensation spring 31 which makes it possible to compensate for the wear of the belt 18 as well as the compression of the sheath of the clutch control cable 30.

As illustrated in particular in FIGS. 3 to 9, the clutch control cable 30 circulates inside a beam 21 which is carried by the protective cover 20.

This beam 21 can, for example, be formed by extrusion, by molding or by overmolding.

The beam 21 is formed by two spaced walls 210, 211 projecting perpendicularly from one face of the protective cover 20, the clutch control cable 30 circulating between these two walls 210, 211.

Between the walls 210, 211 of this beam 21 extends a support plate 22 which is formed integrally with the protective cover 20.

This support plate 22 comprises two spaced apart partitions forming a housing 221 in which a blade 301 can be inserted by means of an insertion slot 222 (the latter is visible in FIG. 7)

The partitions of the support plate 22 have a U-shaped notch 223 (Figure 9), the blade 301 having a central lumen 302 of circular shape.

The clutch control cable 30 has a sheath stop 300 comprising a first sheath end piece 3001 and a second end piece 3002 arranged on either side of the blade 301 and cooperating with each other by screwing or snapping.

The first end piece 3001 encloses the cable 30 and the sheath, the second end piece 3002 encloses the cable 30 only.

These end pieces are housed at the level of the recessed U-shaped portion of the partitions of the support plate 22 through the slot 302 of the blade 301 (FIGS. 6, 8 and 9).

In this way, the sheath stop 300 is retained in the support plate 22 by means of the blade 301 slid freely in the housing 22. Therefore, the sheath stop 300 locks the blade 301 in the housing 22.

As can be seen in particular in FIGS. 6, 8 and 9, the blade 301 is of rectangular shape and of small thickness.

It has a circular light 302 formed in the extension of a notch 303 in which the portion of the clutch control cable 30 without sheath located between the support plate 22 and the lever 40 slides. The clutch control cable 30 is then tensioned and the sheath stop 300 comes into place in the circular slot 302 of the blade 301.

It should be noted that, to achieve blocking, the two ends of the sheath stop 300 have a diameter greater than the diameter of the circular lumen 302 of the blade 301, so that the two ends come to bear against this blade 301 , on opposite sides.

Note that the housing 221 of the support plate 22 has in cross section a first receiving portion disposed on the side of the insertion slot 222, and a second receiving portion having a height less than the height of said first portion of reception (Figure 8).

Thus, the blade 301 slides in the first receiving portion and abuts against the bottom wall of the second receiving portion (Figure 8), a portion of the blade 301 being housed in the first receiving portion in position Assembly.

The blade 301 can be mounted slidably in the second receiving portion.

The blade 301 has two teeth 304 on its opposite ends which abut against the edges of the slot 222 located between the first receiving portion and the second receiving portion of the housing 221. This makes it possible to ensure correct positioning of the blade 301 in housing 221.

Although this embodiment presents a cultivator, it is obvious that the cultivating equipment could be of another type.

The invention can thus be implemented in garden equipment which belongs to the group comprising in particular:

- tillers;

- wheeled brushcutters;

- hoes;

- microbiners;

- shredder mowers;

- blowers;

- scarifiers;

- lawn aerators.

Claims (11)

1. Cultivation equipment (1) comprising a chassis (10) carrying at least one tool (15) for working the soil, a gearbox (33) and a motor (17) driving said tool (15) in rotation by the intermediate said gearbox (33) and a transmission belt (18) loosely mounted on two pulleys (16, 19), one in connection with the driving shaft of said motor (17) and the other in connection with said gearbox (33), the clutch being produced by applying against said belt (18) tensioning means (40, 401, 402) maneuverable by a control lever (121) disposed at a handle (12) of the guide bar of said equipment (1), said tensioning means (40, 401, 402) of the belt (18) being connected to said control lever (121) by means of a cable clutch control clutch (30) in sheath, said garden equipment (1) comprising a protective cover (20) of said transmission belt (18), characterized é in that said clutch control cable (30) has a sheath stop (300) fixed to a support plate (22) of the protective cover (20), said support plate (22) being formed so monobloc with the protective cover (20). 2. garden equipment (1) according to claim 1, characterized in that said support plate (22) has a housing (221), said sheath stop (300) being fixedly held on said support plate (22 ) by a removable retaining blade (301) disposed in said housing (221). 3. garden equipment (1) according to claim 2, characterized in that said blade (301) having a light (302) circular cooperating with the sheath stop (300). 4. Cultivation equipment (1) according to claim 2 or 3, said support plate (22) extending transversely to the wall of the protective cover (20). 5. Cultivation equipment (1) according to one of claims 2 to 4, said support plate (22) having an insertion slot (222) of said retaining blade (301) opening into said housing (221). 6. Cultivation equipment (1) according to claim 5, the blade (301) having two teeth (304) for positioning on two opposite edges which cooperate with opposite edges of the insertion slot (222). 7. Cultivation equipment (1) according to one of claims 2 to 6, said support plate (22) having a notch (223) in which partially engages said sheath stop (300) to bear against said blade (301). 8. Cultivation equipment (1) according to one of claims 2 to 7, said sheath stop (300) comprises a first end piece (3001) end of sheath and a second end piece (3002) arranged on either side other of said blade (301) and cooperating with each other. 9. Cultivation equipment (1) according to any one of the preceding claims, characterized in that it comprises screws (173, 174) passing through circular drums (180) formed on the protective cover (20), said screws (173, 174) being dimensioned to project beyond the barrels (180) and come into contact with said belt (18) so as to guide the latter. 10. Cultivation equipment (1) according to one of the preceding claims, characterized in that it comprises first means for securing (171, 172) the protective cover (20) on said motor (17) and second means for securing (334) the protective cover (20) with the chassis (10). 11. Cultivation equipment (1) according to any one of the preceding claims, characterized in that it belongs to the group comprising: - tillers; - wheeled brushcutters; - hoes; - microbiners; - shredder mowers; 5 - the blowers; - scarifiers; - lawn aerators.