Ploughing machine assembly for treating surface soil

Abstract

The present invention relates to a plow assembly (10) for treating soil surfaces, preferably snow surfaces, comprising a support structure (20) and a plow (30) rotatably mounted on the support structure (20), extending along a plow axis (M-M) and configured to rotate about the plow axis (M-M) for treating soil. The plow (30) includes a first plow portion (30a) extending along a first plow axis (M1-M1) and a second plow portion (30b) extending along a second plow axis (M2-M2). The transmission device (40) is arranged between the two plowing parts and comprises a helical gear speed reducer (41), a first connecting device (60a) and a second connecting device (60b); the first connection means (60a) and the second connection means (60b) are configured to mechanically connect the first plow portion (30a) and the second plow portion (30b) to the helical gear reducer (41), respectively, and to allow the first plow portion (30a) and the second plow portion (30b) to tilt simultaneously with respect to the plow axis.

Description

Technical Field

[0001] The present invention relates to a plough assembly for treating the soil surface of, for example, snow-capped mountains and agricultural land.

[0002] The plough assembly according to the present invention is part of the technical field of the production and commercialization of vehicles and, more generally, machines, equipment and installations for treating the soil surface.

[0003] More specifically, the plough assembly according to the present invention finds a particularly advantageous technical application in treating, in particular, the snow deposited on the surface of the snow, for example, the snow present on the slope surface of a ski lift, so that the snow itself is levelled and generally in optimal conditions for skiing activities.

[0004] The plough assembly according to the present invention is specifically designed to be operatively and mechanically mounted on a snow grooming vehicle (such as a ski resort snow groomer). Background Art

[0005] In the reference technical field, it is known to use a plough assembly, in particular mounted on a vehicle or machine such as a wheeled and / or tracked vehicle, to treat the surface of the soil, for example, the snow present in a ski resort.

[0006] Such vehicles are commonly referred to in the technical terminology of the field by the terms "snow groomer" or "ski resort snow groomer" and are generally used for maintenance operations, in particular for treating the surface of the snow so that the snow itself is suitable for skiing activities.

[0007] Known types of plough assemblies generally include a plough which is rotatably mounted on a support frame of the vehicle and is configured to rotate about a longitudinal axis which is substantially parallel to the surface of the soil to be treated and is substantially orthogonal to the direction of movement of the snow groomer.

[0008] Known types of plough assemblies for treating the topsoil have proven to be not without drawbacks in practice.

[0009] The main drawback lies in the fact that known types of plough assemblies are complex and expensive in structure. In fact, these plough assemblies include a plurality of mechanical components which require corresponding interface elements / bodies for correct connection and also specific lubrication means to extend the operation of these mechanical components over time. In addition, such mechanical components are at least partially designed and / or shaped for a specific application.

[0010] Another drawback is that known types of plough assemblies are difficult to assemble industrially, or they at least require a long assembly time and frequent and expensive maintenance interventions by professional operators.

[0011] Another drawback lies in the fact that known types of plough assemblies are not very robust structurally and have limitations on the maximum power they can transmit. In fact, those involved in the treatment / disposal of the soil surface require the transmission of high power over long time periods. Thus, the known transmission systems (i.e., toothed belt drives and cardan joint drives) cannot achieve the purpose just described, or at least they cannot satisfy this requirement of transmitting power values over time satisfactorily.

[0012] Another drawback lies in the fact that known types of plough assemblies are unreliable. In fact, these plough assemblies are not properly isolated from the surface of the soil being treated / disposed. Thus, any external objects (such as dirt, debris, etc.) may come into contact with the toothed belt drive, the cardan joint and the mechanical components for their connection, thereby quickly impairing the overall function of the plough assembly.

[0013] Another drawback lies in the fact that known types of plough assemblies are large and / or not very compact.

[0014] Object of the invention

[0015] An object of the present invention is to provide a plough assembly for a snowplough that enables at least partially overcoming and remedying the above-mentioned drawbacks of the prior art.

[0016] Another object of the present invention is to provide a plough assembly that allows for the generation of high ploughing power in a compact and / or not large configuration as compared to the prior art solutions.

[0017] Another object of the present invention is to provide a plough assembly that has minimal maintenance interventions, or at least has simple and quick maintenance interventions.

[0018] Another object of the present invention is to provide a plough assembly that is rigid structurally and reliable over time.

[0019] Another object of the present invention is to provide a plough assembly that is simple in construction and quick to assemble.

[0020] Another object of the present invention is to provide a compact and / or not large plough assembly.

[0021] Another object of the present invention is to provide a plough assembly that has an alternative and / or improved configuration both in terms of construction and function as compared to traditional prior art solutions. Summary of the invention

[0022] Herein, the technical task underlying the present invention is to provide a plough assembly for a snowplough that eliminates the drawbacks of the prior art as described above.

[0023] In particular, the above object is achieved by a plough assembly according to the features set forth in claim 1.

[0024] The dependent claims outline particularly advantageous embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features and advantages of the present invention will become more apparent from a general and thus non - limiting description of a preferred but non - exclusive embodiment of a plough assembly for a snowplough, as shown in the accompanying drawings, in which:

[0026] Figure 1 A perspective view shows a plough assembly according to an embodiment of the present invention;

[0027] Figure 2A A perspective view shows Figure 1 the plough assembly shown in, with some parts removed to better highlight other parts;

[0028] Figure 2B A cross - sectional perspective view shows Figure 2A details of the plough assembly shown in;

[0029] Figure 3A Another longitudinal cross - sectional view shows Figure 1 the plough assembly shown in;

[0030] Figure 3B An enlarged detail view shows Figure 3A details of the plough assembly shown in;

[0031] Figure 4 A cross - sectional view shows Figure 1 the plough assembly shown in.

[0032] Referring to the accompanying drawings, which are only for the purpose of illustrating embodiments of the present invention and are intended to better clarify the inventive principles underlying the present invention in conjunction with the description. DETAILED DESCRIPTION OF THE INVENTION

[0033] Referring to the drawings, a plough assembly for treating topsoil is generally designated by the numeral 10.

[0034] More specifically, the plough assembly 10 according to the present invention is advantageously used for treating snow deposited on a snow - covered surface (e.g., the soil surface of a slope in a ski resort).

[0035] In particular, the plough assembly 10 according to the present invention is intended to be operably and mechanically mounted on a snow - grooming vehicle.

[0036] The term "snow grooming vehicle", often also referred to as "snow groomer" or "ski resort snow groomer", shall for the purposes of this specification mean any vehicle or machine designed to process (in particular to level) the snow lying on the soil surface (such as the slopes of a ski resort, etc.). However, without departing from the scope of this specification, the plough assembly 10 according to the invention can advantageously be mounted on different vehicles, machines or equipment for processing the soil (such as of an agricultural type).

[0037] According to the embodiment shown in the attached Figures 1 to 4 , the plough assembly 10 for processing the surface of the soil (preferably, snow) comprises a support structure 20.

[0038] This support structure is configured to accommodate a plurality of assembled functional groups and components, in particular those more detailedly introduced and described in the remainder of the specification.

[0039] According to one aspect of the invention, the support structure 20 extends mainly along an axis M-M, which axis M-M is preferably substantially transverse (in particular orthogonal) to the forward direction of the plough assembly 10 along the surface of the soil to be processed (see Figure 1 ).

[0040] Preferably, the support structure 20 is made of a metallic material, in particular of steel (such as made of one or more carbon steel sheets for the wood industry (such as, S235JR or S355JR, etc.)) so as to provide strength and stiffness during the operation of the plough assembly 10.

[0041] In particular, as Figure 4 shown in detail, the above-mentioned metal sheets are suitably shaped to at least partially wrap the plough and are mechanically connected to each other by connection means of, for example, the threaded type (i.e., bolts) or the riveted type or the permanent type (i.e., welding).

[0042] According to one aspect of the invention, the plough assembly 10 comprises a plough 30, in particular the plough 30 shown in detail in the figures. More specifically, the plough 30 is rotatably mounted on the support structure 20, extends along the plough axis M-M, and is configured to rotate about the plough axis M-M especially during the forward movement of the plough 30 so as to process the soil.

[0043] Preferably, the plough 30 comprises a central body and a plurality of teeth, the central body having a substantially cylindrical shape, the plurality of teeth being suitably shaped to process / dispose of the surface of the soil and being mechanically connected to the central body itself (see Figure 2A ).

[0044] As Figure 3AAs shown in detail, the teeth extend substantially orthogonally to the cylindrical surface of the central body and are preferably mechanically connected to the central body itself by a welding process.

[0045] Thus, the teeth and the central body of the plow 30 are made of a metallic material, in particular of wear-resistant steel.

[0046] According to one aspect of the invention, the plow 30 comprises a first plowing part 30a extending along a first plowing axis M1-M1 and a second plowing part 30b extending along a second plowing axis M2-M2 (see Figure 2A ).

[0047] Preferably, the first plowing part 30a and the second plowing part 30b are substantially equal to each other.

[0048] Preferably, the first plowing part 30a and the second plowing part 30b are spaced apart from each other.

[0049] According to Figure 2A the embodiment shown in detail, the plow assembly 10 comprises a transmission 40 which is interposed between the first plowing part 30a and the second plowing part 30b, is mechanically connected to the first plowing part 30a and the second plowing part 30b, and is configured to drive the first plowing part 30a about the respective plowing axis M1-M1 and the second plowing part 30b about the respective plowing axis M2-M2 by rotation.

[0050] More specifically, the transmission 40 is interposed between the first plowing part 30a and the second plowing part 30b and the motor 50 (see Figure 2A and 3A ). In other words, the transmission 40 mechanically connects the motor 50 to the first plowing part 30a and the second plowing part 30b, thus realizing the connection function between the motor 50 and the first plowing part 30a and the second plowing part 30b.

[0051] According to one aspect of the invention, the transmission 40 comprises a speed reducer, in particular a mechanical speed reducer. The speed reducer particularly does not include any belt drive, such as a toothed belt or a trapezoidal belt.

[0052] In fact, the transmission 40 comprises a gear speed reducer 41 which is configured to receive mechanical power from the motor 50 and transmit it to the first plowing part 30a and the second plowing part 30b.

[0053] Advantageously, higher power can be transmitted by the gear speed reducer 41 compared to different types of mechanical transmissions, such as in particular toothed belts or chain drives.

[0054] Furthermore, the aforementioned gear reducer 41 is housed in a housing (i.e., a hollow body), for example made of a metallic material, in particular cast iron, by means of a casting process.

[0055] More specifically, the housing is substantially closed, in particular hermetically sealed with respect to the external environment, and defines a shell inside which the mechanical components of the gear reducer 41 (described and illustrated in more detail below) are housed.

[0056] In other words, the gear reducer 41 is substantially isolated from the external environment. Advantageously, this prevents dirt and / or natural elements present on the soil surface being processed from coming into contact with the mechanical components of the gear reducer 41 and compromising the functionality of the gear reducer itself. In this way, the lifespan of the gear reducer 41 and thus the lifespan of the transmission 40 are extended over time, and furthermore, maintenance interventions by professional operators are minimized.

[0057] According to one aspect of the invention, the gear reducer 41 includes lubricating oil, in particular contained inside the housing, to lubricate the gear reducer 41 during its operation. In other words, the gear reducer 41 is oil-bathed.

[0058] Advantageously, the service life of the gear reducer 41 is extended over time, and thus also the service life of the plough assembly 10.

[0059] Furthermore, the gear reducer 41 is a self-contained component, i.e., a single assembled unit, clearly visible in Figure 2B Advantageously, any maintenance operation is simple and quick because the operator can easily disconnect the gear reducer 41 as a single unit (i.e., as a single block) and inspect and / or perform the required and particularly dedicated maintenance without having to disassemble the other mechanical components of the plough assembly 10.

[0060] Advantageously, the plough assembly 10 according to the invention allows for simple and efficient management of its functional groups and / or mechanical spare parts.

[0061] According to one aspect of the invention, the transmission 40 further includes a first connecting device 60a connected to the first plough part 30a and a second connecting device 60b connected to the second plough part 30b, the first connecting device 60a and the second connecting device 60b being spaced apart from and opposite to each other with respect to the gear reducer 41.

[0062] More specifically, the first connecting device 60a and the second connecting device 60b are configured to mechanically connect the first plough part 30a and the second plough part 30b to the gear reducer 41 respectively, so as to achieve the combined rotation of the first plough part 30a and the second plough part 30b about respective first plough axes M1-M1 and second plough axes M2-M2.

[0063] In other words, the first connecting device 60a and the second connecting device 60b are configured to drag the first plowing part 30a and the second plowing part 30b to rotate around the corresponding first plowing axis M1-M1 and the second plowing axis M2-M2.

[0064] According to an aspect of the present invention, the first connecting device 60a and the second connecting device 60b can move between an alignment configuration and an inclination configuration. In the alignment configuration, the first plowing part 30a and the second plowing part 30b are oriented substantially parallel to the plowing axis M-M. In the inclination configuration, the first plowing part 30a and the second plowing part 30b are inclined according to the inclination angle φ to allow the first plowing part 30a and the second plowing part 30b to adapt to the morphology of the topsoil to be treated.

[0065] In other words, in addition to transmitting the mechanical power (especially transmitting torque) from the motor 50 (as expected above), the first connecting device 60a and the second connecting device 60b also allow the above-mentioned first plowing part 30a and the second plowing part 30b to move relative to the plowing axis M-M by using the corresponding first plowing axis M1-M1 and the second plowing axis M2-M2.

[0066] In fact, in the alignment configuration, the first plowing axis M1-M1 and the second plowing axis M2-M2 are substantially aligned with each other and substantially aligned with the axis M-M. In the inclination configuration, the above-mentioned first plowing axis M1-M1 and the second plowing axis M2-M2 have corresponding inclination angles φ relative to the plowing axis M-M.

[0067] According to Figures 2A to 4 the embodiment shown in detail in, the transmission device 40 is configured to transmit power along a transmission axis T-T transverse to the plowing axis M-M.

[0068] According to an aspect of the present invention, the gear reducer 41 includes a drive shaft 41a, which is arranged substantially parallel to the transmission axis T-T (preferably arranged vertically), and the drive shaft 41a is configured to rotate around the transmission axis T-T and includes a drive sprocket 43.

[0069] The gear reducer 41 further includes a driven shaft 41b, which is arranged orthogonally to the transmission axis T-T (preferably arranged horizontally), and includes a driven gear 44.

[0070] In particular, the drive sprocket 43 and the driven gear 44 are constrained to each other to define an angular coupling.

[0071] In other words, the gear reducer 41 is an angular gear reducer, i.e., it achieves a deviation of the power from the motor 50 by an angle substantially equal to 90°. In addition, the gear reducer 41 achieves an amplification of the torque (expressed in Nm) transmitted from the motor 50 to the first plow part 30a and the second plow part 30b (and thus a reduction of the rotational angular velocity expressed in radians per second).

[0072] Advantageously, with a single functional group, i.e., the gear reducer 41, the dual functions of deviating the motion by 90 degrees and amplifying the torque transmitted from the motor 50 to the first plow part 30a and the second plow part 30b are achieved.

[0073] According to a preferred but non-exclusive aspect of the present invention, the gear reducer 41 is of the single-stage type. In other words, as Figure 2B shown, the gear reducer 41 includes a single-stage amplification of the torque from the motor 50 and a corresponding reduction of the angular velocity of the first plow part 30a and the second plow part 30b to which the gear reducer 41 is connected. In fact, this single reduction / amplification stage is represented by the aforementioned mechanical coupling between the motor sprocket 43 and the driven wheel 44 (see Figure 2B ).

[0074] According to an aspect of the present invention, the gear reducer 41 includes at least one bevel torque in order to deviate and amplify the power from the motor 50 towards the first plow part 30a and the second plow part 30b, as described above.

[0075] According to Figures 3A to 3B the embodiment shown in detail, the connecting device 60 includes a first toothed coupling 60a between the gear reducer 41 and the first plow part 30a, and a second toothed coupling 60b between the gear reducer 41 and the second plow part 30b.

[0076] More specifically, the first toothed coupling 60a and the second toothed coupling 60b are configured to mechanically connect the first plow part 30a and the second plow part 30b to the gear reducer 41 respectively, so as to drag them to rotate around the respective first plow axis M1-M1 and the second plow axis M2-M2, and allow the first plow axis M1-M1 and the second plow axis M2-M2 to be inclined, so as to allow the adaptation and / or adjustment of the first plow part 30a and the second plow part 30b with respect to the soil surface on which the plowing machine assembly operates.

[0077] Advantageously, the first toothed coupling 60a and the second toothed coupling 60b are simple and economical solutions. In fact, these toothed couplings 60a, 60b are well-established, standardized mechanical components in the art and are easily available on the market, for example for their quick replacement.

[0078] Furthermore, the toothed couplings 60a, 60b are advantageously easy to assemble, noiseless (especially thanks to the internal toothed coupling) and require minimal lubrication and maintenance over time.

[0079] According to one aspect of the invention, the first toothed coupling 60a and the second toothed coupling 60b each comprise two interconnected parts:

[0080] a first part (of sprocket type) having teeth that are rounded outwardly in the radial direction according to the axis M,

[0081] a second part (of ring gear type) that meshes with the first part and has internal teeth facing the axis M. Preferably, the teeth of the second part are linear (not rounded).

[0082] Preferably, the toothed couplings 60a, 60b do not have motion transmission balls or shafts.

[0083] Preferably, the first coupling and the second coupling are made of phosphate-coated steel plates or resin.

[0084] Advantageously, the configuration just described allows ensuring a high tolerance to corrosion and atmospheric media, contributing to extending the useful operating life of the entire plough assembly 10 over time.

[0085] According to one aspect of the invention, the first toothed coupling 60a and the second toothed coupling 60b are also configured to allow an eccentricity value ε between the first plough axis M1-M1 of the first plough part 30a and the second plough axis M2-M2 of the second plough part 30b, respectively.

[0086] In other words, in addition to the above-described inclined configuration of the first plough axis M1-M1 and the second plough axis M2-M2 relative to the plough axis M-M, respectively, the first toothed coupling 60a and the second toothed coupling 60b also allow a further degree of freedom. This further degree of freedom corresponds to the reciprocating movement of the above-described first plough axis M1-M1 and the second plough axis M2-M2 in order to achieve the misalignment between the first plough axis M1-M1 and the second plough axis M2-M2.

[0087] Preferably, the eccentricity value essentially depends on the construction geometry of the first toothed coupling 60a and the second toothed coupling 60b, and even more particularly on the size of the toothed coupling itself (i.e., depends on the dimensions and thus on the transmitted power).

[0088] According to particularly in Figure 4In the embodiment of the present invention shown, the motor 50 is directly connected to the gear reducer 41 without inserting any additional mechanical transmission means.

[0089] In other words, the motor 50 is directly coupled to the gear reducer 41. This mechanical coupling is also referred to in the technical terms of the art as the term "direct control" and is intended to indicate the direct connection between the motor 50 and the gear reducer 41.

[0090] Preferably, the motor 50 includes its own rotor which is directly mounted on the drive shaft 41a such that the transmission axis T-T is aligned with the rotational axis of the rotor.

[0091] In particular, the rotor of the motor 50 is keyed (one forming a continuation of the other) to the drive shaft 41a. In other words, the rotational axis of the rotor of the motor 50 is aligned (and parallel) with the transmission axis T-T. In other words, this configuration is defined in the terms as "the motor 50 is directly mounted on the transmission axis T-T (referring to the gear reducer 41)".

[0092] In this way, the motor 50 is oriented (considering the rotational axis of its rotor as the orientation axis of the motor 50) orthogonally to the plough axis M-M (i.e., vertically oriented) in order to optimize the overall dimensions.

[0093] Advantageously, the plough assembly 10 according to the present invention does not require an additional transmission means between the motor 50 and the plough 30, and this makes the plough assembly 10 simple, compact and / or not bulky compared to the prior art solutions.

[0094] Advantageously, the plough assembly 10 has no mechanical transmission means between the motor 50 and the plough 30, in particular no mechanical transmission means of the flexible type such as for example a toothed belt or a chain drive, and the plough assembly 10 is mechanically rigid.

[0095] According to one aspect of the present invention, the motor 50 is of a type selectable between an electric motor and a hydraulic motor.

[0096] According to one aspect of the present invention, the first toothed coupling 60a and the second toothed coupling 60b are not universal joints or constant velocity joints.

[0097] As expected in the prior art, universal joints have many drawbacks. In fact, when used in applications where high and long-lasting torques are transmitted over time, such joints exhibit rapid deterioration and wear.

[0098] Therefore, such universal joints are not very suitable for demanding and / or heavy-duty technical applications such as those mentioned in the technical field to which the present invention applies.

[0099] Another object of the present invention is a snowplow for treating a snow surface, which extends between a front end and a rear end opposite the front end along a forward direction, and for the sake of simplicity of disclosure, the same number will be maintained for it.

[0100] Preferably, the forward direction of the snowplow is substantially orthogonal to the plow axis M-M along which the plow assembly 10 extends.

[0101] According to one aspect of the present invention, the snowplow includes a frame and at least one plow assembly 10, on which propulsion means such as wheels and / or tracks are mounted, and the plow assembly 10 is connected to the frame at the snow surface and has the above-mentioned features.

[0102] According to one aspect of the present invention, the plow assembly 10 is preferably mounted at the rear end.

Claims

1. A tillage machine assembly (10) for treating a soil surface, preferably a snow surface, the tillage machine assembly comprising: Support structure (20); a tillage machine (30) rotatably mounted on the support structure (20), extending along a tillage axis (MM), and configured to rotate about the tillage axis (MM) in order to process the soil, wherein the tillage machine (30) comprises a first tillage part (30a) extending along a first tillage axis (M1-M1) and a second tillage part (30b) extending along a second tillage axis (M2-M2); a transmission device (40) at least partially interposed between the first plough part (30a) and the second plough part (30b), mechanically connected to the first plough part (30a) and the second plough part (30b), and configured to drive the first plough part (30a) around a corresponding plough axis (M1-M1) and the second plough part (30b) around a corresponding plough axis (M2-M2) by rotation; Characterized in that the transmission device (40) comprises: a gear reducer (41) configured to receive mechanical power from a motor (50) and transmit the mechanical power to the first plowing section (30a) and the second plowing section (30b); and a first connecting device (60a) connected to the first plough part (30a) and a second connecting device (60b) connected to the second plough part (30b), the first connecting device (60a) and the second connecting device (60b) being spaced apart from and opposite to each other relative to the gear reducer (41), wherein the first connecting device (60a) and the second connecting device (60b) are configured to mechanically connect the first plough part (30a) and the second plough part (30b) to the gear reducer (41) respectively, so as to transmit the rotation from the gear reducer (41) to the first plough part (30a) rotating around the corresponding first plough axis (M1-M1) and the second plough part (30b) rotating around the corresponding second plough axis (M2-M2); wherein the first connecting device (60a) and the second connecting device (60b) are movable between an aligned configuration, in which the first plough part (30a) and the second plough part (30b) are oriented substantially parallel to the plough axis (MM), and an inclined configuration, in which the first plough part (30a) and the second plough part (30b) are inclined according to an inclination angle (φ) to allow the first plough part (30a) and the second plough part (30b) to adapt to the morphology of the surface soil to be treated; The gear reducer (41) is configured to transmit mechanical power along a transmission axis (TT) transverse to the plough axis (MM), and comprises: a drive shaft (41a) arranged along the transmission axis (TT) and configured to rotate about the transmission axis (TT) and comprising a drive sprocket (43); a driven shaft (41b) arranged orthogonally relative to the transmission axis (TT) and comprising a driven gear (44); Wherein, the drive sprocket (43) and the driven gear (44) define an angular connection between the drive sprocket (43) and the driven gear (44).

2. The tillage machine assembly (10) according to claim 1, wherein: The motor (50) comprises its own rotor, which is mounted directly on the drive shaft (41a) so that the transmission axis (TT) is aligned with the axis of rotation of the rotor.

3. The tillage machine assembly (10) according to claim 1 or 2, wherein: The gear reducer (41) is of single-stage type.

4. A tillage machine assembly (10) according to any one of the preceding claims, wherein: The gear reducer (41) includes at least one bevel gear to deflect and amplify mechanical power from the motor (50) toward the first plowing section (30a) and the second plowing section (30b).

5. A tillage machine assembly (10) according to any one of the preceding claims, wherein: The first connecting device (60a) and the second connecting device (60b) include: a first gear coupling (60a) interposed between the gear reducer (40) and the first plowing part (30a), and a second gear coupling (60b) interposed between the gear reducer (41) and the second plowing part (30b); Wherein, the first gear coupling (60a) and the second gear coupling (60b) are configured to mechanically connect the first plow part (30a) and the second plow part (30b) to the gear reducer (41) respectively so as to drag the first plow part (30a) and the second plow part (30b) to rotate around the corresponding first plow axis (M1-M1) and the second plow axis (M2-M2), and allow the first plow axis (M1-M1) and the second plow axis (M2-M2) to tilt simultaneously.

6. The tillage machine assembly (10) according to claim 5, wherein: The first gear coupling (60a) and the second gear coupling (60b) are configured to allow a predetermined eccentricity value (ε) between the first plough axis (M1-M1) and the second plough axis (M2-M2).

7. A tillage machine assembly (10) according to any one of the preceding claims, wherein: The motor (50) is directly coupled to the gear reducer (41) without interposing any additional mechanical transmission device.

8. A tillage machine assembly (10) according to any one of the preceding claims, wherein: The motor (50) is of a type selectable between an electric motor or a hydraulic motor.

9. A tillage machine assembly (10) according to any one of the preceding claims, wherein: The first gear coupling (60a) and the second gear coupling (60b) are not universal joints or constant velocity joints.

10. A tillage machine assembly (10) according to any one of the preceding claims, wherein: The first gear coupling (60a) and the second gear coupling (60b) each include two mutually connected parts: a first part, preferably of the sprocket type, having teeth that are rounded outwards according to a direction radial to the plough axis (MM), A second part, preferably of the ring gear type, meshes with the first part and has internal teeth facing the plough axis (MM).

11. A snowplow for treating a snow-covered surface, the snowplow extending in a feeding direction between a front end and a rear end opposite the front end, The snow groomer comprises: a frame on which the propulsion device is mounted; At least one tillage machine assembly (10) connected to the frame at the snow surface and manufactured according to the features set forth in claims 1 to 10.

12. The snow groomer according to claim 8, wherein: The tiller assembly (10) is mounted at the rear end.

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