WO2019192790A1

WO2019192790A1 - Machine farming machine

Info

Publication number: WO2019192790A1
Application number: PCT/EP2019/055345
Authority: WO
Inventors: Nicolas Gerbaud; Peter Vion
Original assignee: Pubert Henri Sas
Priority date: 2018-04-06
Filing date: 2019-03-04
Publication date: 2019-10-10
Also published as: FR3079714A1; FR3079714B1

Abstract

The invention relates to a machine farming machine (1) comprising a frame (10) carrying at least one soil tillage tool (15), a gearbox (33) and a motor (17) that rotates said tool (15) by means of said gearbox (33) and a transmission belt (18) mounted loosely on two pulleys (16, 19), one connected to the drive shaft of said motor (17) and the other connected to said gearbox (33), the gears being engaged by the application against said belt (18) of tensioning means (40, 401, 402) that can be manoeuvred by a control lever (121) arranged on a handle (12) of the guiding bar of said machine (1), said means (40, 401, 402) for tensioning the belt (18) being connected to said control lever (121) by means of a clutch control cable (30), said machine farming machine (1) comprising a hood (20) for protecting said transmission belt (18). According to the invention, said clutch control cable (30) has a cable stop (300) attached to a support plate (22) of the protection hood (20), said support plate (22) being formed as a single piece with the protection hood (20) and comprising a receiving section (221), said cable stop (300) being held on said support plate (22) in a stationary manner by a detachable retaining blade (301) arranged in said receiving section (221).

Description

Garden equipment

FIELD OF THE INVENTION The invention relates to the field of garden equipment.

In particular, the invention relates to equipment such as tillers, tillers, or any other equipment, including those with walking driver, equipped with tillage tools and / or wheels, having a motor and a gearbox, connected by a drive belt. 2. Prior Art

For example, motor-garden equipment, such as motor-tillers, has a tool driven by an engine.

Transmission is usually done through:

a belt mounted loose on two pulleys, one (called motor pulley) in connection with the drive shaft and the other (called receiving pulley) in conjunction with the gearbox and the tool, and

a tensioning means of the belt, of the roller or cam type, whose movement 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.

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 provides security for the user.

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

Conventionally, the inner cover provides several functions within the garden equipment, including: - the fastening to the engine;

positioning and maintaining the gearbox in position;

the management of the center distances and in particular of the center distance between the motor shaft carrying the motor pulley and the input shaft of the gearbox carrying the receiving pulley;

- Positioning and maintaining in position the clutch control cable clutch stop which is in the form of a tip.

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

However, such methods are relatively expensive and the support plate obtained is relatively exposed to breakage by the shocks and vibrations that the equipment motoculture undergoes.

In addition, and more generally, such garden equipment has a large number of mechanical parts, which strike the weight of the equipment and can cause discomfort of use and maneuver for a user.

Finally, the manufacture of current gear, and disassembly in case of failure, is relatively complex and requires multiple operations (de) mounting, which increases costs.

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

3. Objectives of the invention

An object of the present invention is to overcome at least in part the disadvantages 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 of the clutch control cable on 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 that is lighter to facilitate its use but also sufficiently robust.

4. Presentation of the invention

These objectives, as well as others that will appear in the remainder of this description, are achieved by using a garden equipment comprising a chassis carrying at least one tillage tool, a gearbox and an engine. rotating said tool through said gearbox and a drive belt mounted loosely 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 operable by a control lever disposed on a handle of the guide bar of said equipment, the tensioning means of the belt being connected to said control lever via a sheathed clutch control cable, the garden equipment including a transmission belt guard.

According to the invention, the clutch control cable has a sheath stopping fixed on a support plate of the protective cover, the support plate being integrally formed with the protective cover, the support plate having a housing , said sheath stop being held fixedly on said support plate by a removable retaining blade disposed in said housing.

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 one-piece piece.

Such a turntable is easy to achieve while being robust.

As a result, the solution for mounting and immobilizing the cable on the inner cover is economical and reliable. As described, the support plate has a housing, the sheath stop being held fixedly on the support plate by a removable retaining blade disposed in the housing.

In other words, by the use of a blade slid freely in a housing of the plate, it ensures a reliable locking of the clutch control cable sheath stop safely and economically.

The maintenance of the equipment is also facilitated

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

This locking solution is simple and inexpensive 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 an insertion slot of 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 the implementation of a notch, otherwise called U-shaped cutout, the plate forms a kind of stirrup, which ensures a reliable maintenance of the sheath of the cable control cable. clutch.

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

The cylindrical ends which enclose the cable are secured 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 barrels 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 securing means of the protective cover on said motor and second securing means of the protective cover with the frame.

Finally, the equipment of motoculture belongs to the group including in particular:

- the tillers;

- wheeled brush cutters;

- motor tillers;

- microbiners;

- grinding mowers;

- the bleachers;

- the 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 that it presents, will be more easily understood, in the light of the following description of an illustrative and non-limiting embodiment thereof, and the appended drawings among which: Figure 1 is a side view of a garden equipment comprising a mechanical gearbox according to one 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 view, in perspective, of a protective cover of a garden equipment of the invention; FIG. 4 is a close-up view, from the side, of the protective cover of FIG.

3;

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

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 side of the protective cover of the preceding figures;

- Figures 8 and 9 are left and right views, in section along the axis A-A defined in Figure 4, the protective cover, and

Figure 10 is a partial perspective view of a protective cover of a garden equipment of the invention.

6. Detailed description of an embodiment of the invention

An embodiment of the invention is subsequently illustrated, treated as a simple illustrative and nonlimiting example, in support of FIGS. 1 to 10.

Throughout 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 one embodiment of the invention.

In this embodiment, the garden equipment is a tiller. This garden equipment 1 comprises a horizontal monobloc frame 10 supporting a transport wheel 14 and two tillage tools 15 rotated in the latter around a transverse shaft driven by a chain 101 disposed in a housing 100. It further comprises a gearbox 33 and a motor 17 rotating the tools 15 through the gearbox 33 and a transmission belt or clutch 18 mounted loosely on two pulleys 16, 19.

The pulley 16, called receiver, is located at the rear of the frame 10, above the latter. The receiving pulley 16 is itself driven by the heat engine 17, located at the front of the frame 10. The motor shaft 17 carries the motor 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 operable by a control lever 121 disposed at 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 including an accelerator lever or throttle control.

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

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

With the belt 18 mounted loose between the receiving pulleys 16 and the motor 19, the driving of the motor pulley 19 can only be achieved by the tension of the belt 18 by means of a roller 401 for plating the belt 18 (called also "tensioner roller") which is supported 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 hingedly pivoted about an axis 402, and connected to the end of a control cable. clutch 30, itself connected to the clutch control lever 121.

The clutch control lever 121 is located near the right handle 12 of the handlebar 11 of the equipment and can rotate 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.

Clamping the clutch control lever 121 against the handle 12 allows, by the tension of the belt 18, to engage the tools 15, its release causing disengagement, which is a safety for the user. More specifically, the approach of the clutch control lever 121 allows a traction on the clutch control cable 30, and thus the pivoting of the roller 401 in contact with the belt 18, which causes the tension of the belt 18. The roller 401 bends inward the belt portion 18 between the two pulleys 16 and 19.

In a conventional manner, the gearbox 33 and the motor 17 are fixed on the frame 10 of the tiller 1. The rest of the elements is 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 protection assembly.

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

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

One could imagine other embodiments in which the protective cover is in 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 frame 10 which are visible in FIGS. 3, 4 and 10.

Advantageously, screws 173, 174 passing through circular barrels 180 are also used to guide the belt 18 as closely as possible.

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

These two screwing barrels 180 cooperate with screws 173, 174 mounted open on these drums 180 screwing. These screws 173, 174 pass through the drums 180 screwing so that their end is located opposite the belt 18 and in contact with the latter for better guidance.

Means for securing the protective cover 20 with the belt cover 24 comprise circular holes 331, 332, 333 adapted to cooperate with fixing screws.

As described above, the tensioning means of the belt 18 comprise an actuator lever 40 rotatable about an axis 402 integral with the protective cover 20, the actuator lever 40 being connected to the control lever 121 via cable 30.

It is noted that the clutch control cable 30 is connected to a compensation spring 32 which makes it possible to compensate the wear of the belt 18 as well as the settlement 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 may, for example, be formed by extrusion, molding or overmolding.

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

Between the walls 210, 211 of this beam 21 extends a support plate 22 which is integrally formed with the protective cover 20. This support plate 22 comprises two spaced partitions forming a housing 221 in which can be inserted a blade 301 through an insertion slot 222 (the latter is visible in Figure 7)

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

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

The first endpiece 3001 encloses the cable 30 and the sheath, the second endpiece 3002 enclosing the cable 30 only.

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

In this way, the sheath stopping 300 is retained in the support plate 22 by means of the blade 301 slid freely in the housing 22. As a result, the sheath stopping 300 locks the blade 301 in the housing. 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 slot 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 is slid. The clutch control cable 30 is then stretched and the sheath stopping 300 is put in place in the circular light 302 of the blade 301.

It should be noted that, to achieve the blocking, the two ends of the sheath stop 300 have a diameter greater than the diameter of the circular light 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 is slid into 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 slidably mounted tightly 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 ensures proper positioning of the blade 301 in dwelling 221.

Although this embodiment has a tiller, it is obvious that the garden equipment could be of another type.

The invention can thus be implemented in motoculture equipment belonging to the group comprising in particular:

- the tillers;

- wheeled brush cutters;

- motor tillers;

- microbiners;

- grinding mowers;

- the bleachers;

- the scarifiers;

- lawn aerators.

Claims

1. 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) by means of intermediate of 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) of tensioning means (40, 401, 402) operable by a control lever (121) arranged 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) via a clutch control cable (30) under a sheath,

said garden equipment (1) comprising a protective cover (20) of said transmission belt (18),

said clutch control cable (30) having a sheath stop (300) attached to a support plate (22) of the protective cover (20), said support plate (22) being integrally formed with the cover protector (20), 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).

2. Equipment motoculture (1) according to claim 1, characterized in that said blade (301) having a circular lumen (302) cooperating with the sheath stop

(300).

3. Garden equipment (1) according to claim 1 or 2, said support plate (22) extending transversely to the wall of the protective cover (20).

4. garden equipment (1) according to one of claims 1 to 3, said support plate (22) having an insertion slot (222) of said blade (301) opening into said housing (221).

5. Garden equipment (1) according to claim 4, the blade (301) having two teeth (304) for positioning on two opposite edges which cooperate with opposite edges of the insertion slot (222).

6. Equipment motoculture (1) according to one of claims 1 to 5, said support plate (22) having a notch (223) in which is engaged in part said stop sheath (300) to take support against said blade (301).

7. Garden equipment (1) according to one of claims 1 to 6, said sheath stop (300) comprises a first end piece (3001) of sheath end and a second end piece (3002) arranged on both sides. other of said blade (301) and cooperating with each other.

8. Equipment motoculture (1) according to any one of the preceding claims, characterized in that it comprises screws (173, 174) passing through barrels (180) circular formed on the protective cover (20), said screws (173, 174) being dimensioned to protrude beyond the barrels (180) and engage said belt (18) to guide the belt (18).

9. Garden equipment (1) according to one of the preceding claims, characterized in that it comprises first securing means (171, 172) of the protective cover (20) on said motor (17) and second means securing (334) the protective cover (20) with the frame (10).

Garden equipment (1) according to any one of the preceding claims, characterized in that it belongs to the group comprising:

- the tillers;

- wheeled brush cutters; - motor tillers;

- microbiners;

- grinding mowers;

- the bleachers;

- the scarifiers;

- lawn aerators.