Radio controlled vehicle

Abstract

A vehicle (1) comprises a frame (2) having a longitudinal axis (X), a transverse axis (Y) and a vertical axis (Z); the vehicle (1) has a drive unit (8), a control unit (9), a movement unit (3, 3I, 3II), and a remote control (10); wherein the control unit (9) is configured to exchange information and data with the remote control (10) to regulate the drive unit (8); wherein the frame (2) is provided with a fixed part (5) and a movable part (6); wherein at least a portion of the drive unit (8) is fixed to the movable portion (6); the vehicle (1) having a lifting system (7) interposed between the fixed part (5) and the movable part (6) and configured to move the movable part (6) relative to the fixed part (5) along the vertical axis (Z); wherein the lifting system (7) has a plurality of actuators (18, 18I, 18II).

Description

[0001] Cross - Reference to Related Applications

[0002] This patent application claims the priority of Italian Patent Application No. 102022000019851, filed on September 27, 2022, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] This invention patent application relates to an improved radio-controlled vehicle.

[0004] In particular, the present invention relates to a radio-controlled vehicle configured to operate equipment that is subjected to high stress during use.

[0005] Advantageously, the radio-controlled vehicle according to the present invention includes a compact movement unit that supports its own frame, i.e., it suspends the frame a few centimeters above the ground; in this way, the radio-controlled vehicle according to the present invention is particularly compact and is thus easy to transport and can be used in restricted spaces.

[0006] The final application type of the radio-controlled vehicle according to the present invention mainly depends on the type of equipment installed.

[0007] For example, the present invention relates to a radio-controlled vehicle that can be used as a folding forklift. In this case, the radio-controlled vehicle according to the present invention is equipped with a tilting lifting unit. The folding forklift is used in the road transportation sector. The folding forklift is usually housed in a special seat under the lower part of a vehicle trailer. Therefore, it is important to be able to minimize the size of the folding forklift as much as possible while maintaining the same load handling capacity.

[0008] According to another example, the present invention relates to a radio-controlled vehicle that can be used in mines, or in narrow underground passages and uneven ground, for tunnel excavation and / or for transportation. In this case, the radio-controlled vehicle according to the present invention is equipped with a bucket or similar equipment.

[0009] Advantageously, the radio-controlled vehicle according to the present invention is configured to be able to move safely on ramps, slopes, rough terrain, etc. Background Art

[0010] Forklifts for lifting and transporting goods are well known. For example, EP 2377806 B1 describes a forklift in which the lifting unit is foldable and can be selectively arranged in a position selected from a group of different positions. The possible positions of the lifting unit include a fully open position and a fully closed position.

[0011] According to the solution described in EP 2377806 B1, the engine and other components such as hydraulic actuators, radiators, and fuel tanks are housed in an engine compartment located at the rear of the truck and vertically movable. This provides free space within the forklift base into which the lifting unit can be fully folded when in the closed position.

[0012] The engine compartment and its load are configured to balance the lifting unit during use.

[0013] A disadvantage of known forklifts is that in use, the engine compartment must run along vertical slides to balance the lifting unit and / or raise the engine compartment above the support surface and allow the forklift to move on steep ground without hitting the engine compartment against the ground. In particular, the engine compartment is raised during use to prevent it from colliding with the ground or obstacles on the ground, taking into account both the compactness of the radio-controlled vehicle itself and the short distance between the frame and the ground.

[0014] Disadvantageously, the ability of known forklifts to raise the engine compartment is limited. This therefore limits the ability to balance the lifting unit and thus the overall lifting capacity of the forklift. Summary of the Invention

[0015] The object of the present invention is to provide an improved radio-controlled vehicle which is in particular capable of lifting heavier loads than known solutions.

[0016] According to the present invention, there is provided a radio-controlled vehicle as described in the appended claims. Brief Description of the Drawings

[0017] The present invention will now be described with reference to the drawings, which show non-limiting embodiments of the present invention, in which:

[0018] - Figure 1 is a view of a radio-controlled vehicle according to the present invention in an operating configuration.

[0019] - Figure 2 is a side view of a radio-controlled vehicle in a first operating configuration in Figure 1 ;

[0020] - Figure 3 is similar to Figure 2 and shows a radio-controlled vehicle in another operating configuration;

[0021] - Figure 4A is a perspective view of details of a radio-controlled vehicle according to the present invention;

[0022] - Figure 4B is Figure 4AExploded view of the details therein;

[0023] - Figure 5 is Figure 4A the plan view of the details therein;

[0024] - Figure 6 is the section along the line VI-VI in Figure 5 therein; and

[0025] - Figure 7A 、 7B Figures 7C and 7D show further details of the radio-controlled vehicle according to the present invention in different respective operating configurations. Detailed Description of the Invention

[0026] Figure 1 Reference numeral 1 in the figures generally denotes a radio-controlled vehicle according to the present invention. The radio-controlled vehicle 1 is configured to operate a tool T. According to the example shown, the tool T is a lifting unit, and the radio-controlled vehicle 1 is a radio-controlled forklift. According to a variant not shown, and without loss of generality, the tool T may be selected from a group of different tools; for example, the tool T may include an articulated arm which in turn operates a bucket (for excavating and / or transporting materials), a pneumatic hammer, a shredder, etc. Advantageously, the radio-controlled vehicle 1 is an excavator for tunneling and / or transporting soil; in this case, the tool T is an articulated arm that manipulates a bucket. The application of the radio-controlled vehicle 1 as a forklift ( Figure 1 ) will be referred to hereinafter, however the features described and shown herein also apply to any other type of use of the radio-controlled vehicle 1 (e.g., an excavator as described above), since the final application essentially depends on the type of tool T installed.

[0027] The radio-controlled vehicle 1 has:

[0028] - A longitudinal axis X, also referred to as the roll axis, which is substantially parallel to the support plane π1 of the radio-controlled forklift 1;

[0029] - A vertical axis Z, also referred to as the yaw axis, which is substantially perpendicular to the support plane π1; and

[0030] - A transverse axis Y, also referred to as the pitch axis, which is substantially perpendicular to both the longitudinal axis X and the vertical axis Z.

[0031] In the following and in the figures, this reference system is used for all components of the radio-controlled vehicle 1.

[0032] When the radio-controlled vehicle 1 moves in the forward direction v on the support plane π1 (a plane parallel to the plane XY), terms such as front, rear / back, top / up, bottom / down, right, left, etc. are used.

[0033] The suffixes I and II are used to indicate the components on the left and right sides of the radio-controlled forklift 1 respectively according to the forward direction v.

[0034] The superscripts ′ and ″ are used to indicate the components on the front and rear sides of the radio-controlled forklift 1 respectively.

[0035] The radio-controlled vehicle 1 includes: a frame 2 and a motion unit 3. According to the example shown, the motion unit 3 includes two tracks 3I, 3II (schematically shown). According to a variant not shown, instead of the tracks 3I, 3II, the motion unit 3 may include wheels or other equivalent rolling elements.

[0036] Figure 2 and Figure 3 The radio-controlled vehicle 1 is shown in two different corresponding operating configurations. In particular, Figure 2 the radio-controlled vehicle 1 shown in a fully open state is better shown below, Figure 3 the radio-controlled vehicle 1 shown in a fully closed state.

[0037] Figure 4 shows details of the frame 2 of the radio-controlled vehicle 1. In fact, in order to modify the configuration of the radio-controlled vehicle 1 shown by way of example (but not in a limiting way) as in Figure 2 and Figure 3 the frame 2 includes a fixed part 5 and a movable part 6.

[0038] In use, both the fixed part 5 and the movable part 6 are substantially parallel to the support plane π1.

[0039] According to the example shown, the movable part 6 can be located behind the fixed part 5 and project cantilever-like backward from the motion unit 3. According to a variant not shown, the movable part 6 is in front of the fixed part 5 and arranged in the front position of the radio-controlled vehicle 1.

[0040] According to the example shown, the frame 2 includes a central part 4 which is configured to accommodate at least a part of the tool T ( Figure 3 ) and / or an attachment for the tool T. The central part 4 is inserted between the tracks 3I, 3II. As a non-limiting example, the central part 4 is a base plate.

[0041] In use, the frame 2 is substantially parallel to the support plane π1.

[0042] Advantageously, the radio-controlled vehicle 1 is compact.

[0043] Advantageously, the radio-controlled vehicle 1 includes a lifting system 7 that connects the movable part 6 to the fixed part 5 of the frame 2, and the lifting system 7 is configured to selectively change the relative position between the movable part 6 and the fixed part 5. In particular, the lifting system 7 is configured to translate the movable part 6 relative to the fixed part 5 along the vertical axis Z, as will be better shown hereinafter.

[0044] The radio-controlled vehicle 1 further includes a drive unit 8, a control unit 9, and a remote control 10.

[0045] The drive unit 8 includes a set of machines and / or systems configured to activate the radio-controlled vehicle 1 and any tool T. For example, the drive unit 8 may include one or more of the following components (the following is an exemplary non-exhaustive list):

[0046] - An engine (e.g., an internal combustion engine, an electric motor, a hybrid engine, or an equivalent engine);

[0047] - A hydraulic system for circulating pressurized oil F (e.g., the hydraulic system includes a pump unit and a conduit for selectively supplying hydraulic oil to a hydraulic actuator); and

[0048] - A radiator (e.g., a water-oil cooler).

[0049] The control unit 9 is configured to remotely exchange information and / or data with the remote control 10. The control unit 9 particularly adjusts each component of the drive unit 8 according to the operating parameters set by the operator by means of the remote control 10.

[0050] Advantageously, the radio-controlled vehicle 1 further includes an engine hood 14 that is fixed to the movable part 6 and is configured to define an engine compartment 15 together with the movable part 6 itself. Advantageously, the drive unit 8 is mounted on the movable part 6 of the frame 2 and is at least partially housed in the engine compartment 15.

[0051] According to the example shown, the engine hood 14 is a box-shaped body, and its shape is substantially a parallelepiped, where the main longitudinal axis Y1 is parallel to the transverse axis Y.

[0052] According to the example shown, the radio-controlled vehicle 1 includes a fuel tank 11 and a hydraulic oil tank 12. Preferably, the fuel tank 11 and the hydraulic oil tank 12 are fixed to the movable part 6 of the frame 2. In this way, the positions of the fuel tank 11 and the hydraulic oil tank 12 along the axis Z can change according to the position of the movable part 6 relative to the fixed part 5.

[0053] According to the example shown, the fuel tank 11 and the hydraulic oil tank 12 project cantileveredly from the engine hood 14 and are located above the central part 4 of the frame 2. The fuel tank 11 and the hydraulic oil tank 12 are configured to balance each other.

[0054] Figure 6 shows Figure 5 section VI-VI of, and shows in section: a fixed part 5, a movable part 6, and a lifting system 7. The lifting system 7 advantageously includes a plurality of parallel linear actuators 18. Without loss of generality, according to the example shown, the lifting system 7 includes two actuators 18, hereinafter referred to as the left actuator 18I and the right actuator 18II.

[0055] Preferably, each actuator 18 is a linear actuator. The number and arrangement of the actuators 18 may be different from those shown. It should be noted that, according to the example shown, the longitudinal axis of the actuator 18 lies in a plane π2 that is perpendicular to the support plane π1 and inclined at an angle α with respect to the longitudinal axis X ( Figure 5 ).

[0056] According to the example shown, both actuators 18 are of the hydraulic type. Without loss of generality, each actuator 18 may be selected from a group of actuators that are different from each other in type. For example, alternatively, the actuator may be a linear guide and / or a rack and pinion, a nut-screw, or an equivalent system.

[0057] According to the example shown, the actuators 18I and 18II are identical to each other, so hereinafter a single actuator 18 is described, the features of which are considered to be valid for the other actuator, and for the sake of brevity, no further elaboration is required.

[0058] According to the example shown, each actuator 18 has a longitudinal axis Z1 that is substantially parallel to the vertical axis Z. Therefore, hereinafter, the terms "upper" and "lower" are used with reference to this orientation.

[0059] Each actuator 18 includes a double-acting hydraulic cylinder 19.

[0060] Figures 7A to 7D The hydraulic cylinder 19 in different respective operating configurations is described in detail, as will be better shown hereinafter.

[0061] Each hydraulic cylinder 19 includes:

[0062] - a tubular body 20 that is substantially coaxial with the longitudinal axis Z1 and defines an inner cavity 21;

[0063] - a piston 22 that is inserted into the inner cavity 21 and is movable along the longitudinal axis Z1. The piston 22 divides the cavity 21 into two variable-volume chambers V1 and V2, which are fluidly isolated from each other (schematically shown in a known manner and, for example, by seals that are mounted on the piston 22 and slide on the tubular body 20). Hereinafter, the chambers are referred to as the lifting chamber V1 and the closing chamber V2;

[0064] - Two cylinder heads, hereinafter referred to as the lower cylinder head 23 and the upper cylinder head 24, which are respectively fixed to the lower end 25 and the upper end 26 of the tubular body 20 so as to seal the inner cavity 21;

[0065] - A rod 27, which is fixed to the piston 22 and is capable of sliding through the through hole 28 of the lower cylinder head 23. The rod 27 of the hydraulic cylinder 19 is fixed to the fixing portion 5 of the vehicle frame 2. According to Figure 6 the example shown, the rod 27 of the hydraulic cylinder 19 protrudes from the bottom of the tubular body 20 during use. The rod 27 has a threaded end f1, which is bolted to the corresponding hole 50 of the fixing portion 5 of the vehicle frame 2.

[0066] Each hydraulic cylinder 19 further includes:

[0067] A conduit 32, which fluidly connects the lifting chamber V1 to the connection port 33;

[0068] A conduit 34, which fluidly connects the closed chamber V2 31 to the engagement port 35.

[0069] According to the example shown, the conduit 32 is formed within the upper cylinder head 24, while the conduit 34 is outside the tubular body 20.

[0070] Advantageously, each actuator 18 is telescopic. According to Figure 4A 、 Figure 4B 、 Figure 5 and Figure 6 the example shown, each actuator 18 includes an outer bushing 38 and an inner bushing 40, which are tubular bodies inserted into each other and can slide relative to each other along their own longitudinal axis Z1.

[0071] In particular, the hydraulic cylinder 19 is inserted into the inner bushing 40, and the inner bushing 40 is in turn inserted into the outer bushing 38. The inner bushing 40 and the outer bushing 38 can move relative to each other along the longitudinal axis Z1.

[0072] The hydraulic cylinder 19 is fixed to the inner bushing 40. The outer bushing 38 is fixed to the movable portion 6 of the vehicle frame 2, while the hydraulic cylinder 19 is fixed to the fixing portion 5; in this way, the actuator 18 is telescopic, and the hydraulic cylinder 19 is accommodated within the outer bushing 38 and the inner bushing 40 in any operating configuration.

[0073] According to Figure 4A 、 4B 、5 and 6 shown in the example, the outer bushing 38 has an inner cavity 39, and the inner bushing 40 has an inner cavity 42 ( Figure 6 ).

[0074] Advantageously, each actuator 18 further includes an inner bushing 40, and the hydraulic cylinder 19 is at least partially inserted into the inner bushing 40. The inner bushing 40 is interposed between the hydraulic cylinder 19 and the outer bushing 38.

[0075] The outer bushing 38 and the inner bushing 40 can slide relative to each other along the longitudinal axis Z1. Preferably, the actuator 18 includes a sealing system 41 which is interposed between the inner bushing 40 and the outer bushing 38. Preferably, the sealing system 41 includes a seal which is preferably made of an elastic material and configured to prevent material (solid or liquid) from passing between the inner bushing 40 and the outer bushing 38. Advantageously, the sealing system 41 is configured to elastically compensate for any misalignment or inclination between the inner bushing 40 and the outer bushing 38.

[0076] The outer bushing 38 is directly or indirectly fixed to the hydraulic cylinder 19.

[0077] According to the example shown, the upper cylinder head 24 of the hydraulic cylinder 18 has a through hole 44 which is substantially transverse to the longitudinal axis Z1. The outer bushing 38 has a corresponding radial hole 45 which is configured to be aligned with the through hole 44 in use.

[0078] The actuator 18 further includes a pin 46 which is inserted through the hole 45 of the outer bushing 38 and the hole 44 of the upper cylinder head 23 of the hydraulic cylinder 19.

[0079] The pin 46 constrains the outer bushing 38 to the upper cylinder head 23 of the hydraulic cylinder 19.

[0080] The outer bushing 38 is fixed to the movable part 6 of the vehicle frame 2 (or is integrally formed with the movable part 6 of the vehicle frame 2).

[0081] The inner bushing 40 is fixed to the fixed part 5 of the vehicle frame 2.

[0082] Advantageously, the lifting system 7 includes a cover 47 which covers the tops of both actuators 18I and 18II to protect them from external factors.

[0083] In addition, the cover 47 is configured to allow pipes or equivalent elements for connecting the connection ports 33, 35 to the hydraulic system of the radio-controlled vehicle 1 to pass through.

[0084] According to the example shown, the lifting chamber V1 is arranged above the closing chamber V2 relative to the piston 22. In this way, during use, the piston 22 moves from the raised position S1 ( Figure 7B and 7C ) to the closed position S2 under the thrust of gravity, and this descent is counteracted by the oil fed into the closing chamber V2 under pressure. In this way, advantageously, the supply of pressurized oil F counteracts the descent of the movable part 6, thereby preventing the engine compartment 15 from mostly falling during the descent.

[0085] Advantageously, the movable part 6 of the vehicle frame 2 is fixed to the lower end of the outer bushing 38, thereby achieving the maximum possible translation of the movable part.

[0086] Advantageously, two actuators 18 are arranged side by side to form a lifting system 7, allowing the load of the engine compartment 15 to be distributed over the parallel actuators 18. This reduces the risk of the rod 27 breaking and / or bending under the buckling load.

[0087] Advantageously, the actuators 18I, 18II are side by side in a plane π2 perpendicular to the support plane π1 and are inclined at an angle α less than 90° with respect to the longitudinal axis X. This imparts greater rigidity to the lifting system, thus reducing the risk of any bending of the actuators 18.

[0088] The operation of the lifting system 7 for translating the engine compartment 15 of the radio-controlled vehicle 1 relative to the support plane π1 is described below.

[0089] The operator exchanges information and data with the control unit 9 via the remote control 10. The control unit 9 in turn regulates the hydraulic system 12. Thus, the operator can control the raising and lowering of the engine compartment 15 via the remote control 10.

[0090] To control the raising and lowering of the engine compartment 15, the control unit 9 regulates the hydraulic system 12 in such a way as to supply pressurized oil F to the connection ports 33 of each hydraulic cylinder 19.

[0091] Preferably, the pressurized oil F is supplied to all the actuators 18 (18I and 18II in the example shown) simultaneously. In this way, all the actuators 18 translate simultaneously, keeping the engine compartment 15 substantially parallel to the support plane π1.

[0092] Figure 7A and 7B Shows the last moment when the hydraulic cylinder 19 transitions from the closed position S2 to the raised position S1.

[0093] During the lifting phase, pressurized oil F is supplied to the lifting chamber V1 in order to push the piston 22 towards the lower cylinder head 23 of the tubular body 20. During the lifting phase, the rod 27 is pushed out of the tubular body 20. Figure 7B Shows the moment when the piston 22 is in the fully raised position S1.

[0094] Figure 7A and 7B Shows the last moment when the hydraulic cylinder 19 transitions from the closed position S1 to the raised position S2.

[0095] Figure 7C Shows the moment of conversion when the lifting chamber V1 is placed in communication with the discharge (i.e., the pressure in the lifting chamber V1 drops) and the closed chamber V2 is supplied with pressurized oil F.

[0096] Advantageously, a lifting system 7 of the above type allows the position of the engine compartment 15 to vary according to the specific use conditions of the radio-controlled vehicle 1. For example, it allows the engine compartment 15 to be lifted from a lowered position very close to the support plane π1 so that the radio-controlled vehicle 1 can move forward even on slopes and / or rough terrain.

[0097] Furthermore, the lifting system 7 can be used to balance the load applied to the tool T by moving the engine compartment 15 in order to change the position of the center of gravity of the radio-controlled vehicle 1.

[0098] Advantageously, a lifting system 7 of the above type is more robust than a conventional type of lifting system 7 and thus allows higher loads to be lifted, ensuring greater safety.

[0099] In addition, advantageously, the fact that the lifting system 7 includes two actuators 18 aligned on a plane π2 inclined with respect to the longitudinal axis X of the radio-controlled vehicle 1 reduces the risk of any bending of the actuators 18 (in particular, it reduces the risk of bending under the buckling load).

[0100] Advantageously, the fact that the actuator 18 has an outer bushing 38 fitted onto an inner bushing 40 allows the engine compartment 15 to be precisely centered on the fixing part 5 of the frame 2. Furthermore, the presence of a sealing system 41 between the outer bushing 38 and the inner bushing 40 makes it possible to elastically compensate for any misalignment and inclination.

[0101] Advantageously, the fact that each hydraulic cylinder 19 is a double-acting cylinder in which the closing chamber V2 is located below the open chamber V1 with respect to the piston 22 allows the lowering of the engine compartment 15 during the closing operation to be cushioned and reduces the risk of the engine compartment 15 falling sharply downwards under the action of its own weight.

Claims

1. A radio-controlled vehicle, comprising a frame (2) having a longitudinal axis (X), a transverse axis (Y) and a vertical axis (Z); said vertical axis (Z) being perpendicular to a support plane (π1); said vehicle (1) comprising a drive unit (8), a control unit (9), a movement unit (3, 3I, 3II), a remote control (10); wherein said control unit (9) is configured to exchange information and / or data with said remote control (10) to adjust said drive unit (8); wherein said frame (2) further comprises a fixed part (5) and a movable part (6); wherein at least a part of said drive unit (8) is fixed to said movable part (6); said vehicle (1) comprising a lifting system (7), said lifting system (7) being interposed between said fixed part (5) and said movable part (6) and configured to move said movable part (6) along said vertical axis (Z) relative to said fixed part (5); wherein said lifting system (7) comprises a plurality of actuators (18, 18I, 18II).

2. The vehicle according to claim 1, wherein, said lifting system (7) comprises two actuators (18, 18I, 18II); wherein said actuators (18, 18I, 18II) are linear actuators; each actuator (18, 18I, 18II) has a respective longitudinal axis (Z1, Z1I, Z1II); wherein the longitudinal axes (Z1, Z1I, Z1II) of said actuators (18, 18I, 18II) are parallel to said vertical axis (Z) and lie in a second plane (π2), said second plane (π2) being perpendicular to said support plane (π1) and inclined at an angle (α) with respect to said longitudinal axis (X).

3. The vehicle according to any one of the preceding claims, wherein, each actuator (18, 18I, 18II) comprises a double-acting hydraulic cylinder (19), said double-acting hydraulic cylinder (19) in turn comprising: - a tubular body (20), said tubular body (20) defining an inner cavity (21); - a piston (22), said piston (22) being inserted into said inner cavity (21) and subdividing said inner cavity (21) into a first chamber (V1) and a second chamber (V2); wherein each chamber (V1, V2) has a variable volume; wherein said first chamber (V1) and said second chamber (V2) are fluidically isolated from each other; - a first cylinder head (24) and a second cylinder head (23), said first cylinder head (24) and second cylinder head (23) being respectively fixed to the first end (26) and the second end (25) of said tubular body (20) to seal said inner cavity (21); - a rod (27), said rod (27) being fixed to said piston (22) and capable of sliding through a through-hole (28) of said second cylinder head (23).

4. The vehicle according to claim 3, wherein, The first chamber (V1) is defined by the portion of the inner cavity (21) between the piston (22) and the first cylinder head (24); wherein, the second chamber (V2) is defined by the portion of the inner cavity (21) between the piston (22) and the second cylinder head (23); wherein, the first cylinder head (24) is arranged above the second cylinder head (23) with respect to the second longitudinal axis (Z1).

5. The vehicle according to claim 3 or 4, wherein, the rod (27) of the hydraulic cylinder (19) is fixed to the fixing portion (5) of the vehicle frame (2); wherein, the second cylinder head (24) is fixed to the movable portion (6) of the vehicle frame (2).

6. The vehicle according to any one of claims 3 to 5, wherein, each hydraulic cylinder (19) includes: a first conduit (32) that fluidly connects the first chamber (V1) to a first port (33); a second conduit (34) that fluidly connects the second chamber (V2) to a second port (35); wherein, the first conduit (32) is realized within the first cylinder head (24), and the second conduit (34) is outside the tubular body (20); in particular, the first port (33) receives pressurized oil (F) in use to raise the movable portion (6), and the second port (35) receives pressurized oil (F) in use to lower the movable portion (6).

7. The vehicle according to any one of claims 3 to 6, wherein, each actuator (18, 18I, 18II) is telescopic.

8. The vehicle according to claim 7, wherein, each actuator (18, 18I, 18II) includes an outer bushing (38) and an inner bushing (40); the outer bushing (38) and the inner bushing (40) are tubular; the hydraulic cylinder (19) is at least partially received within the inner bushing (40); the inner bushing (40) is in turn received within the outer bushing (38); the outer bushing (38) and the inner bushing (40) are capable of sliding relative to each other along the longitudinal axis (Z1) of the hydraulic cylinder (19); each actuator (18, 18I, 18II) includes a sealing system (41) that is interposed between the inner bushing (40) and the outer bushing (38) and is made of an elastic material; the inner bushing (40) is fixed to the hydraulic cylinder (19); the outer bushing (38) is fixed to the movable portion (6) of the vehicle frame (2); the rod (27) of the hydraulic cylinder (19) is fixed to the fixing portion (5) of the vehicle frame (2).

9. The vehicle according to any one of the preceding claims, wherein, the drive unit (8) includes a set of machines and / or systems configured to start the vehicle (1) and any tools; in particular, the drive unit (8) includes one or more of the following components: an engine, a hydraulic system, and a radiator.

10. The vehicle according to any one of the preceding claims, wherein, The control unit (9) adjusts each element of the drive unit (8) according to the operating parameters set by the operator by means of the remote control (10).

Images