RU2260558C2 - Self-propelled cart with telescopic boom and height increasing device - Google Patents

Abstract

FIELD: handling machines used for lifting works.

SUBSTANCE: self-propelled cart has height increasing device pivotally connected with support for rotating through an angle of about 180º between folded rear position and unfolded front position. Drive mechanisms for controlling rotation in pivotal joint of height increasing device are formed as jack and leverage mechanism. Support has supporting device for height increasing device folded to rear position. Telescopic boom base is pivotally connected with height increasing device for rotation through an angle 180° between folded position on height increasing device and position where it is aligned with height increasing position. Other drive mechanisms for controlling rotation of telescopic boom serve for rotating this boom through an angle of 180° relative to height increasing device and also comprise jack and leverage mechanism. Front end of telescopic boom is equipped with transition device for replaceable receiving of various working tools.

EFFECT: increased zone for servicing of self-propelled cart.

7 cl, 7 dwg

Description

The present invention relates to a self-propelled trolley with a telescopic boom and a height increase, used during loading and unloading, lifting (cargo), earthwork, etc., in particular, in industrial or civil engineering.

It is already known by French patent No. 2457240 (MONTGON) a self-propelled vehicle equipped with stabilizers, a fixed control cabin and a turret mounted on the chassis of the vehicle and carrying a telescopic boom connected by means of a bar that increases the height of the lift, or “height increase”.

The rod increasing the height of the lift, or the “height increase” of this unit, is pivotally connected at one end to the front of the turret along the horizontal axis, allowing rotation through an angle between 0 ° and about 100 °, based on its folded horizontal position. The other end of the elevator is pivotally connected along the horizontal axis to the base of the telescopic boom. A lifting hook is provided at the front end of the telescopic boom, driven by a winch. Drive devices designed to deploy this design are simple jacks without a lever system, consisting of one jack installed between the turret and height elevator, and another jack installed between the height elevator and the base of the telescopic boom.

Such an aggregate is well suited for loading and unloading at a height, for example, for the supply of goods during the construction of structures, carried out by a more or less high rise of the height increase, while the telescopic boom is horizontal or inclined. In any case, the execution of the French patent No. 2457240 has the following disadvantages and disadvantages:

- The unit is limited in its use by loading and unloading or lifting goods suspended from a hook; it is not designed to accept additional equipment, such as a bucket, loading fork or basket, which would allow for more diverse use.

- As stated above, the maximum angle of rotation of the height increase in the articulation is approximately 100 °. In addition, the articulation of the telescopic boom with respect to the height elevator allows, in practice, rotation by an angle of the same order, given the drive mechanisms provided, which are jacks without a lever system. From this it follows that the working area of the unit is limited; in particular, the unit is not intended for loading and unloading in the rear upper sector.

- Also, due to the restriction of movement along the angle of the elevator and telescopic boom, the maximum reach of the boom is limited by the deployed, almost vertical position of the elevator.

- There is no support for the height increase in the folded position, which is why the unit cannot be used (with the height increase folded down) as a mobile crane with a telescopic boom, which has the same characteristics as those of such a crane.

- Since the cab is locked in the lower position, the visibility of the operator in this cab is limited and loading and unloading operations require the presence of an auxiliary operator, who must warn of obstacles, in particular obstacles located at the control station level.

French Patent No. 2,444,639 (POTAIN) describes another example of a self-propelled telescopic boom unit with an articulated guide sleeve, which generally retains the same inconvenience: angular restrictions between the articulated guide sleeve and the boom with values of approximately 90 °, hence the limitations of the working area (limited by sector to 90 °); restriction on the use of loading and unloading operations with goods suspended on a hook; insufficient visibility from the operator.

Another similar self-propelled unit is described in the application for French patent No. 2761972 (MODULES ASSOCIES). The telescopic boom is pivotally mounted on a height extender with a rotation angle of up to 180 ° theoretically, but the height boom is pivotally mounted on a chassis with a rotation angle of approximately 90 ° between the back-folded position and the raised position, so here too the working area remains limited.

The present invention aims to eliminate all the previously described inconveniences by offering an aggregate of the type in question, but with improved design and kinematics, in order, in particular, to optimize the scope of work, allowing very diverse uses, and the viewing area for the operator is significantly improved.

In this regard, the object of the invention is a self-propelled cart with a telescopic boom and a height increase, in which the height increase is pivotally connected at one horizontal axis to a bearing support and pivotally connected at its opposite end along the other horizontal axis to the base of the telescopic boom, the front end of which has a working equipment; moreover, drive mechanisms are provided for controlling rotation in a pivot joint of a height increase relative to a support and a rotation in a pivot joint of a telescopic boom relative to a height increase, moreover, the drive means for controlling rotation in a pivot connection of a height increase have a jack, and, moreover, a control station is provided, characterized in , what:

- the height increase is pivotally connected to the support with the possibility of rotation through an angle of approximately 180 ° between the folded rear position and the unfolded front position,

- the drive mechanisms for controlling the rotation in the swivel joint of the height increase are made with the possibility of rotation in the swivel connection of this height increase at an angle of about 180 ° relative to the support and are equipped with a lever mechanism,

- the support comprises a support device for the second end of the height increase folded into the rear position,

- the base of the telescopic boom is pivotally connected to a height increase with the possibility of rotation through an angle of 180 ° between the position folded on the height increase and the position set in line with the height increase,

- the drive mechanisms for controlling the rotation in the articulation of the telescopic boom are made to rotate in the articulation of this telescopic boom at an angle of 180 ° relative to the height increase and contain a jack and a lever mechanism,

- the front end of the telescopic boom is equipped with a transition device designed to receive, in an interchangeable manner, various working equipment.

In addition, in the self-propelled cart according to the invention there are:

a height increase is pivotally connected with its front end to the front of the pivot bearing, which has the ability to rotate around a vertical axis with respect to the main chassis of the self-propelled truck,

the support device of the height increase in its folded rear position contains vertical U-shaped elements with lateral guides on the support, which interact with a horizontal traverse mounted on the rear side of the height increase in the region of the second end of this height increase, to which the telescopic boom is articulated,

the support device for the height increase in its folded rear position may have a lockable support preventing the height increase from being lifted,

the control station is integrated with the control cabin and mounted on a support movable in height by means of a design in the form of a variable parallelogram, driven by at least one jack, allowing the cabin to be moved between the lower position and the upper position,

- the upper position of the cab is located at the level of the end of the elevator, to which the telescopic boom is pivotally attached when the elevator occupies its vertical position,

the working equipment received by the adapter provided on the front end of the telescopic boom is a fixed hook, or a lifting winch, or forks, or a bucket, or a basket.

In addition, the invention gives the self-propelled aggregate special kinematics, which combines:

- the angular deviation of the height increase with respect to the support is approximately 180 ° between the folded rear position and the unfolded front position, the positions are almost horizontal;

- the angular deviation of the telescopic boom with respect to the elevator, which is also 180 °, between the position folded on the elevator and the deployed position of the same boom, bringing this arrow in line with the elevator.

Swivel angles of approximately 180 ° can be effectively obtained by providing, in a preferred embodiment of the invention, that the drive mechanisms for controlling the rotation in the articulation of the height extender relative to the support by an angle of approximately 180 ° be formed by at least one jack device and a lever mechanism, and that the drive mechanisms for controlling the rotation in the articulation of the telescopic boom relative to the height extender by an angle of about 180 ° would also be images us, at least one device with jack (self-propelled screw) and a lever mechanism.

Thanks to the combination of these angular deviations, the self-propelled cart can cover a significant working area, the area of which to the vertical plane includes:

- the upper rear sector, the maximum envelope of which is defined by the provisions “height increase is almost horizontal, folded back, telescopic boom is aligned with the height increase” and “height increase is almost vertical, telescopic arrow is aligned with the height increase” (this sector does not overlaps with currently used equipment);

- the upper front sector, the maximum envelope of which is determined by the provisions “the height increase is almost vertical, the telescopic boom is aligned with the height increase” and “the height increase is almost horizontal, laid out forward, the telescopic arrow is aligned with the height increase”; this overlap is larger than that of the currently used equipment, given the fact that the elevator occupies an almost horizontal spread out position;

- the lower front sector, the maximum envelope of which is determined by the provisions “the height increase is almost horizontal, laid out forward, the telescopic arrow is aligned with the height increase” and “the height increase is almost horizontal, spread out forward, the telescopic arrow is almost vertical, pointing down”; this overlap is larger than that of the currently used equipment, given the fact that the elevator occupies an almost horizontal spread out position;

- the lower rear sector, the maximum envelope of which is defined by the provisions “the height increase is almost horizontal, laid out forward, the telescopic boom is almost vertical, points down” and “the height increase is almost horizontal, spread out forward, the telescopic boom is in an inclined position, under the height increase” (this last the sector is not blocked by currently used equipment).

The possibility of a variable inclination of the elevator with respect to the support in combination with a variable inclination of the boom with respect to the elevator with the possibility of changing the length of the boom allows you to cover the entire area of each of the four sectors previously defined, therefore, serve any points of a previously defined working area.

In addition, if the height increase is pivotally connected with its front end to the front of the swivel support or a “turret”, which can be rotated around a vertical axis with respect to the basic chassis of the self-propelled cart, the design and kinematics of the unit allow you to cover the full volume formed by the rotation of the working plane previously defined around a vertical axis.

In addition, the mechanical support of the elevator in its folded rear position allows independent operation of one telescopic boom with the same characteristics as the classic self-propelled cart with a telescopic boom that does not have an elevator. Thus, the folded position of the elevator is not only a simple transport position, but a real working position.

The support of the height increase on the support can be a simple guided support, usually sufficient; in one embodiment, the support means comprise on the chassis vertical U-shaped elements with side rails that interact with a horizontal traverse fixed to the rear side of the height increase in the region of the second end of this height increase, to which the telescopic boom is pivotally attached. In an embodiment of the invention, it can also be a lockable support that prevents the elevator from being raised, for example, by means of hooks, lowered and locked on the aforementioned traverse.

According to another advantageous difference, the control post of the self-propelled trolley is integrated with the control cabin and mounted on a support movable in height using a design in the form of a variable parallelogram, driven by at least one jack, which allows the cabin to be moved between the lower position and the upper position. Advantageously, the upper position of the cabin is located practically at the level of the end of the elevator, to which the telescopic boom is pivotally attached when the elevator occupies its almost vertical position. According to an additional device, the drive for controlling the vertical position of the cab is combined with the control of the lift of the height increase in order to constantly and automatically provide the operator with a good field of view.

In addition, the adapter provided at the front end or “head” of the telescopic boom can receive various working equipment, such as, for example, a fixed hook or a lifting winch, fork, bucket, basket, etc., which can be moved into any point in the work area defined earlier.

Thus, in general, the self-propelled trolley, an object of the invention, is suitable for numerous and diverse application methods carried out in a large work area, including upper and lower rear sectors, which are of interest for numerous application methods. In all these applications, they benefit from a noticeable increase in the reach of the boom of the unit due to the significant angular deviation of the height increase and the possibility of using the height increase and the telescopic boom set on the same line, while not excluding the possibility of working with only one telescopic boom with the height increase folded. The vertical mobility of the cab provides excellent visibility in all applications and at all positions of the height increase. Finally, the possibility of folding and changing the length of the boom allows you to place the unit in a low-load transport position, while the control cabin is lowered to move the self-propelled cart along the road.

The invention will be more clearly understood using the description below, with reference to the accompanying schematic drawings, which, by way of example, show the embodiment of this self-propelled cart with a telescopic boom and illustrate the possibilities of using such an assembly:

figure 1 is a side view of a self-propelled trolley corresponding to the present invention, and the height enhancer and telescopic boom are folded in the transport position;

figure 2 is an enlarged scale of the node A of figure 1, showing, in particular, the support device of the elevator folded into the rear position;

figure 3 is a side view showing the general kinematics of a self-propelled cart;

figure 4 illustrates the operating position of the unit with a height increase folded into the rear position;

FIG. 5 illustrates other operating positions with a height enhancer arranged horizontally forward or laid out vertically;

6 illustrates other operating positions that allow you to work under the supporting surface of a self-propelled cart;

7 illustrates the possibilities of using a self-propelled cart equipped with a basket.

The self-propelled cart, shown in particular in figures 1 and 2, has a main chassis 1 mounted on wheels 2 with pneumatic tires and equipped with stabilizers 3. On the main chassis 1 is mounted a swivel bearing 4, which can be rotated around a vertical axis 5, which the illustrated example passes through the center of the main chassis 1. On the swivel support, a structure consisting of a height increase 6 and a telescopic boom 7. is pivotally mounted on the swivel support 4.

The height increase 6, which is a box-section beam, is pivotally connected by the front end along the horizontal axis 9 to the front of the swivel support 4. The height increase 6 is also connected to the swivel support 4 by a drive mechanism consisting of a jack 10 and a lever system 11. Swivel axial 9 and the drive mechanism 10-11 allows rotation of the height increase 6 by an angle of approximately 180 ° between the two extreme positions, one is almost horizontal, in which the height increase 6 is folded into the rear position, and the other is also practical horizontal ski, in which the height increase 6 is laid out in the front position.

The telescopic boom 7 is formed of several successive elements, for example, from the first element 12, called the base, the intermediate element 13 and the end element 14, which is equipped at its front end with a head 15. The base 12 of the telescopic boom 7 is pivotally connected along the horizontal axis 16 with the second end of the magnifier height 6. This base 12 is also connected with a height increase 6 by a drive mechanism consisting of a jack (self-propelled screw) 17 and a lever system 18. Swivel on the axis 16 and the drive mechanism anizm 17-18 allow the telescoping boom rotation 7 relative to the enlarger height 6 at an angle of approximately 180 ° between two extreme positions; in one of its extreme positions, the telescopic boom 7 is folded on a height increase 6, while in its other extreme position, the telescopic arrow 7 is deployed in line with the height increase 6.

The pivot bearing 4 comprises a back support device 19 for a height increase 6, the structure of which is clearly visible in figure 2. The support device 19 consists of vertical U-shaped elements that interact with a horizontal traverse 21 mounted on the rear side 22 of the height increase 6 near the second end of this height increase 6, i.e. from swivel 16 of the telescopic boom 7.

The control cabin 8 is mounted on a rotary support 4 in a height-movable manner using a structure in the form of a variable parallelogram, consisting of two rods 23 pivotally attached to the vertical elements 20 of the supporting device 19. This structure, in the form of a variable parallelogram, is equipped with a drive in the form of a jack, not shown. Cabin 8 can be moved between the lower position (Figs. 1 and 4) and the upper position (Fig. 5) with the possibility of occupying an intermediate position (Figs. 6 and 7). The plane of vertical movement of the cabin 8 is located next to the plane of movement of the elevator 6 and the telescopic boom 7.

The head 15 of the telescopic boom 7, equipped with a transition device 24, designed to receive interchangeably different operating equipment, is also attached to the front end of the telescopic boom 7. The working equipment may be, in particular, a bucket 25 (Figs. 1 and 6), a fixed hook or lifting winch 26 (Fig. 3), fork 27 (Figs. 4, 5 and 6) or a basket for lifting personnel 28 (Fig. 8).

In the folded transport position, as shown in FIG. 1, the height increase 6 is lowered almost horizontally and placed on the support device 19. The elements of the telescopic boom 7 are retracted one into another and it is placed on the height increase 6. The cab 8 is lowered and is located in front of the swing support 4 on the side of the elevator 6 and the boom 7. In addition, in the illustrated method of use, the head 15 of the boom 7 and the bucket 25 occupy a place in front of the main chassis 1.

Figure 3 illustrates the general kinematics of the height enlarger 6 and the telescopic boom 7, which is the result of their mutual deviations allowed by their articulated joints 9 and 16. Taking here as the basis for loading and unloading, the combination of these deviations allows you to overlap four strictly defined sectors, indicated I-IV:

- the upper rear sector I of the loading and unloading operations, the maximum envelope of which is determined by the position “height increase 6 is almost horizontal, folded back, telescopic boom 7 is aligned with height increase 6” and position “height increase 6 is almost vertical, telescopic boom 7 is set in one line with a 6 ”height increase;

- the upper front sector II of the loading and unloading operations, the maximum envelope of which is determined by the final previous position and the position "the height increase 6 is almost horizontal, laid out forward, the telescopic boom 7 is aligned with the height increase 6";

- the lower front sector III of the loading and unloading operations, the maximum envelope of which is determined by the final previous position and the position "height increase 6 is almost horizontal, laid out forward, telescopic boom 7 is almost vertical, directed downwards";

- the lower rear sector IV of the loading and unloading operations, the maximum envelope of which is determined by the final previous position and the position “height increase 6 is almost horizontal, laid out forward, the telescopic boom 7 is in an inclined position, located under the height increase 6” (maximum boom 7 inclination with respect to vertical is 90 °, but in practice it is limited by the environment).

The swivel joints of the height increase 6 and / or telescopic boom 7 and the possibility of changing the length of this boom 7 allow you to cover the entire area of each of the four sectors I, II, III and IV, as illustrated by the intermediate positions shown in figure 3, as well as the arrow F, symbolizing here the possibility of changing the length of the boom. The addition of the four sectors previously defined gives the vertical plane of the loading and unloading operations (plane of FIG. 3). The possibility of rotation of the rotary support 4 around the vertical axis 5 creates in space, based on this plane, a certain amount of loading and unloading.

Figure 4 illustrates more precisely the use of a self-propelled cart with a height increase 6 in its folded rear position and resting on a support device 19 mounted in the rear of the pivot bearing 4. In this case, the boom 7 can be rotated around a horizontal axis 16, which is held stationary, between almost horizontal position and almost vertical position, while the arrow 7, in addition, can change the length. A self-propelled cart is thus used as a unit with a simple telescopic boom, for example, for loading (unloading) a load 29 mounted on a fork 27.

Self-propelled cart can also be used, as shown in figure 3, with a height increase 6, deployed vertically, with a telescopic boom 7, having a variable inclination and to some extent extended. The unit can also provide the distribution of the load 29 over the low structure 30 or behind an obstacle such as a wall. In this use position, the cabin 8 is advantageously moved to the upper position almost at the level of the upper end of the height increase 6, the operator’s visual axis 31 passing over the structure or other obstacle in such a way that direct visual control of the load 29 is maintained during its loading (unloading).

As also shown in Fig. 5, a self-propelled cart can also be used with a height increase 6, horizontally deployed forward and extended by a telescopic boom 7, aligned with this height increase 6. This working position allows you to distribute the load 29 through the hole in the structure 30.

6 illustrates other uses that allow work below the supporting plane 33 of the self-propelled cart. So, with a height increase 6, turned forward, and with a telescopic arrow 7 pointing downward (a dashed line is shown with a dash line), it is possible to distribute the load 29 at the bottom of the foundation pit 34. With a height increase 6, held in an inclined position, and a telescopic arrow 7, laid on this height elevator 6 (shown by a solid line), it is possible to move the bucket 25 along an inclined plane 35 during earthwork: construction of inclined structures (road slopes, canal bank, dam), excavation. Of course, depending on the equipment that the telescopic boom 7 carries, it is also possible to load (unload) construction debris, plates of material, concrete, etc. along an inclined plane 35.

Finally, FIG. 7 illustrates the possibilities of using a self-propelled cart equipped with a basket 28 held horizontally in which one or more people can be. Basket 28 allows you to work at heights in the upper rear I and front II sectors (as defined earlier), for example, for installing scaffolding or cladding buildings even in narrow compartments in which the full rotation of the pivot bearing 4 around the vertical axis 5 is impossible. 7 illustrates, it is also possible, moving the basket to the lower rear sector IV, to inspect the columns 36 and the canvas 37 of the bridge 38 when the self-propelled carts are located on the same bridge 38.

Do not go beyond the scope of the invention, which are defined in the attached claims:

- performing the "bearing" part without a swivel support or turret, in this case, the height increase is articulated to the main chassis;

- performing the main chassis without stabilizers;

- performing a height increase in the form of a rod structure, instead of a box-section structure;

- providing a height enlarger consisting of two or more telescopic elements, allowing to increase its height;

- changing the design of the support of the elevator, in particular, by adding means to block the elevator in its folded rear position;

- changing the drive mechanisms of the hinged joints of the height increase with a support and / or telescopic boom with height increase, providing, in particular, for one hinge two symmetrical devices with a jack (self-propelled screw) and a lever system, located symmetrically on one or the other side of the hinge and working at the same time; this may be caused due to power or bulkyness;

- combining the commands for raising the cabin with the commands for lifting the elevator, not excluding disconnection if necessary;

- Adapting all types of working equipment to the head of the telescopic boom.

Claims (7)

1. A self-propelled cart with a telescopic boom and a height increase, in which the height increase (6) is pivotally connected at one end along the horizontal axis (9) to the supporting support (4) and pivotally connected at its opposite end along the other horizontal axis (16) to the base ( 12) a telescopic boom (7), the front end of which has working equipment, moreover, drive mechanisms are provided for controlling the rotation in the articulation of the height elevator (6) relative to the support (4) and the rotation in the articulation of the telescopic spruce (7) relative to the height increase (6), and the drive means for controlling rotation in the swivel joint of the height increase have a jack, in addition, a control post is provided, characterized in that the height increase (6) is pivotally connected to the support (4) with the possibility of rotation through an angle of approximately 180 ° between the folded rear position and the unfolded front position, the drive mechanisms (10, 11) for controlling the rotation in the swivel joint of the height increase (6) are made with the possibility of rotation in the swivel joint of this uv height elevator (6) at an angle of about 180 ° relative to the support (4), and equipped with a lever mechanism, the support (4) contains a support device (19) for the second end of the height enhancer (6), folded into the rear position, the base of the telescopic boom (7) ) is pivotally connected to the height increase (6) with the possibility of rotation through an angle of 180 ° between the position folded on the height increase (6) and the position set in line with the height increase (6), the drive mechanisms (17, 18) for controlling the rotation in the hinge connecting the telescopic boom (7) you They are rotatably swiveled by a 180 ° angle to this telescopic boom relative to the height extension (6) and contain a jack and a linkage; the front end of the telescopic boom (7) is equipped with a transition device (24) designed to receive various working equipment interchangeably ( 25, 26, 27, 28). 2. Self-propelled carriage of claim 1, characterized in that the height increase (6) is pivotally connected with its front end to the front of the pivot bearing (4), which can be rotated around a vertical axis (5) with respect to the main chassis of the self-propelled cart. 3. Self-propelled trolley according to any one of claims 1 and 2, characterized in that the supporting device (19) of the height increase (6) in its folded rear position contains vertical elements (20) of a U-shape with side guides on the support (4) which cooperate with a horizontal traverse (21) fixed on the rear side (22) of the height increase (6) in the region of the second end of this height increase (6), to which the telescopic boom (7) is pivotally attached. 4. Self-propelled trolley according to any one of claims 1 to 3, characterized in that the support device (19) of the height increase (6) in its folded rear position can have a lockable support preventing the height increase (6) from being lifted. 5. Self-propelled trolley according to any one of claims 1 to 4, characterized in that its control station is integrated with the control cabin (8) and mounted on a support (4) movable in height by means of a design in the form of a variable parallelogram (23) driven in movement by means of at least one jack, allowing the cab (8) to be moved between the lower position and the upper position. 6. Self-propelled trolley according to claim 5, characterized in that the upper position of the cabin (8) is located at the level of the end of the height increase (6), to which the telescopic boom (7) is pivotally attached when the height increase (6) occupies its vertical position. 7. Self-propelled trolley according to any one of claims 1 to 6, characterized in that the working equipment received by the transition device (24) provided on the front end (15) of the telescopic boom (7) is a fixed hook or a lifting winch (26 ), or a fork (27), or a bucket (25), or a basket (28).

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