HU206658B - Overhead-wire mounting carrier - Google Patents

Abstract

A catenary vehicle using a working platform which can be raised and lowered comprises, for extending the working platform (4), four lifting columns each having hydraulically driven members capable of moving telescopically relative to one another. In this arrangement, each lifting column can be adjusted by in each case one stationary, vertically arranged toothed chain (21) running over in each case one chain wheel (29) and two pressure rollers (20), the chain wheels (29) for two respective lifting columns (3a, 3b) being rigidly mounted on a shaft (19). In addition, an additional chain wheel (29) is rigidly mounted on each shaft (19), and a first shaft (19) is connected to a second shaft (19) by means of a chain (8a and 8b respectively). The parallel position of the working platform 4 with respect to the reference plane is guaranteed by the invention without having to use an additional parallel-guiding device. <IMAGE>

Description

Scope of the description: 8 pages (including 3 sheets)

EN 206,658 Β

FIELD OF THE INVENTION The present invention relates to an overhead line mounting carriage having a workstation for lifting or lowering.

Overhead line wagons and mobile work and assembly vehicles with mobile workstations have long been used in the field of transport and energy and telecommunication assembly technology. Such type of overhead contact wagons are known in many embodiments, the main function of which is to raise or lower the working position in a parallel position to a reference level, in most cases a lower car. Several different lifting and lowering devices have been developed for this purpose.

In such a moving carriage group, the working position is lifted and lowered hydraulically by the Nuremberg scissor structure.

Such type of lifting and lowering devices are described, for example, in DE-Gbm 8311 437-8. The description describes a mobile airbag, where the disadvantage of said system, namely the mechanical instability of the raised, extended position, is immediately apparent. The force caused by the wind, which affects the extended working position, leads to the shear of the scissor structure and hence to the bodily integrity of the workforce.

In addition, there have been attempts to create an overhead contact line trolley, where the workstation has been built on telescopically interlocking retractable members. In these embodiments, the shortcomings in the parallel operation of the working position relative to the chassis of the trolley assembly car have been overcome by mechanical and / or electrical measures. The disadvantage of such lifting and lowering systems is, in principle, the relatively greater inaccuracy of the parallel naming of the working position for the simpler structures, while the sensitivity of the guide to the failure of the precise and precise guides.

It is an object of the present invention to provide an overhead contact line assembly which, in addition to eliminating the above-mentioned shortcomings of the known solutions, provides simple handling, high operational safety and personal safety.

In the course of the present invention, an overhead contact wagon with a liftable and retractable work station was used, in which the height adjustment of the workstation according to the invention is carried out by four lifting columns, which are hydraulically interlocked, telescopically interconnected, each lifting column being fixed, vertically arranged, on a sprocket and two. the roller chain running on a pressure roller, and wherein the two sprockets for the two masts are pivotally mounted on an axle, and each sprocket is rigidly mounted on a further sprocket and is coupled second through the first shaft chain.

The invention has provided synchronized lifting and lowering speeds for all lifting columns so that their head and carrier heads are always in a single horizontal plane. This ensures that the working position, regardless of the altitude position, is always parallel to the reference plane defined by the chassis frame.

According to a preferred embodiment of the overhead contact line wagon according to the invention, the working position is mounted on more than four, preferably an even number of, lifting columns, each of which is connected via a chain through the shaft following it.

This made it possible for the first time to install heavy duty overhead lines on trolleys containing more than two lifting pairs in relation to the reference level, so that the working position is exactly parallel.

According to a further preferred embodiment of the overhead contact line wagon according to the invention, each axle is provided with a plurality of additional sprockets rigidly supported, each having a chain in a drive connection.

The advantage of this is that the lifting columns of extremely heavy work stations can also be synchronized with the system according to the invention with great accuracy. In addition, keeping the appropriate distance between the adjacent sprockets can also reduce the torsional stress of the shafts.

It is also preferred according to the invention if the chains connecting the axes are crossed in shape 8.

In this variant of the invention, all the moving units are located within the area bounded by the lifting columns. This design is advantageous in cases where, for structural reasons, all actuators must be brought together in a relatively small area.

According to a preferred embodiment of the overhead contact line assembly according to the invention, the lifting columns are mounted on a fixed carriage on a rotary boom.

In this way, the universal usability of the overhead contact line assembly according to the invention is increased because the working position can be adjusted to different angular positions, even in a perpendicular direction to the travel direction of the mounting carriage.

According to a further preferred embodiment of the overhead contact line wagon according to the invention, the workstation is provided with at least one laterally horizontally extensible mounting level extension.

The advantage of this is that places that are very difficult to access are also easily accessible from the truck.

It is also advantageous according to the invention if the workstation is surrounded by a folding railing inwards or outwards.

This feature makes it possible to move the assembly car according to the invention during shifting, even under overhead contact lines.

According to a preferred embodiment of the overhead contact line assembly according to the invention, the first shaft is propelled by a propulsion engine and the subsequent axle

The axle or axles are driven by a chain or chains.

It is also possible to switch the drive to the power unit in the event of a failure or failure of the hydraulic system.

According to a further preferred embodiment of the overhead contact line assembly according to the invention, the torque conveyor chains are crossed in shape 8.

This design allows the drive system to be adapted to the special construction of the overhead contact line.

Finally, an embodiment of the overhead contact line wagon according to the invention is preferred in which a break detector structure is activated to activate a blocking system for each chain and roller chain.

In this way, the safety of the mounting car has increased further.

The invention will now be described in more detail with reference to the accompanying drawings, in which an exemplary embodiment of the proposed overhead contact line assembly is shown. It is in the drawing

Figure 1 is a side elevational view of an embodiment of the overhead contact line assembly according to the invention with a non-crossed-chain chain;

Figure 2 is a side view of a trolley with a workpiece rotated perpendicular to the direction of travel with a crossed-chain chain and

Figure 3 is an enlarged sectional view of an upper portion of a mast that is associated with a chain and sprocket.

As shown in Figures 1 and 2, in the preferred exemplary embodiment (1) of the overhead cable assembly car according to the invention, the carriage carrying wheels (18) are movably guided on rails. (2) lifting columns (4) are mounted vertically (3a, 3b) on the upper carriage (4). The carriage (2) (2) is mounted on a bogie which is also fastened to the carriage (1). With the turntable (12), the upper carriage (2) can be turned to the left and right at any high angle, even perpendicular to the direction of travel. Figures 1 and 2 also show that the upper parts (5a and 5b) and (5c) of the lifting columns (3a, 3b) are arranged. Each of the actuators (5a, 5b, 5c) consists of a sprocket (29) arranged between two stationary bearings and two (20) press rollers. Two two fixed bearings are used for the two or three (3a, 3b) lifting columns for the left or right end of a common axis.

Approximately half of the distance between the two masts (3a, 3b) is provided with an additional sprocket on the axle assigned to the respective masts (3a, 3b). In the case shown, the lifting column (3a) and the lifting column behind the plane of the indicated elements not shown in Figures 1 and 2 are joined together, as does the lifting column (3b) on the right and not shown in Figures 1 and 2. lifting column forms a single functional unit. The first axle is connected to the second axis by the addition of two non-crossed or non-crossed chains (8a, 8b) through the non-rotationally sprung sprockets. In this way, synchronization of the rotational speed of both said axes is ensured, thereby synchronizing the lifting speed and lifting path of the four masts (3a, 3b). The chain cabinet (6), on the one hand, protects the operator of the overhead contact line trolley from damage, and on the other hand, protects the drive units (5a, 5b, 5c), the non-crossed chain (8a) and the crossed (8b) chain from dirt and moisture.

The stiffening profiles (11) connecting the lifting columns (3a, 3b) to the chain box (6) substantially increase the strength of the fixed part of the lifting columns (3a, 3b) by the lateral displacement of the lifting columns (3a, 3b) at the working position (4), above all. raised (4) workstation and also prevented by fully extended (14) mounting level extension. The power supply (9) on the upper carriage (2) and the control cabinet (10) include electrical components for supplying and controlling the own drive of the overhead contact line wagon. In addition, the carriage (1) is preferably provided with a tool cabinet (7).

The workstation (4) is surrounded by a folding (17) barrier. The carriage (2) is provided with a ladder (13) extending from the carriage (2) to the work station (4). Since the ladder (13) is rigidly folded and rigidly connected to the carriage (2) at both ends of the working position (4), the length (4) is automatically adapted to the respective height of the workstation.

Fig. 2 also shows a laterally extensible mounting level extension (14) for easy access to workplaces that are otherwise difficult to access from the overhead line wagon.

In the longitudinal section of the upper part of the upper part of the lifting column (3a, 3b), the telescoping members, namely, a hollow, rigidly fixed (22) piston rod, an inner movable column (31), and an external fixed (32) lift section are recognizable. The outer, firmly fixed (32) lifting column is provided with a stable support for the upper carriage (2). In order to ensure a sufficiently high rigidity, the inner movable column (31) is formed with a double wall. The outer fixed (32) lifting column portion extends the outward stability of the lifting columns (3a, 3b) while extending the inner movable (31) mast section. In order to keep the friction losses to a minimum, a small slip plate (25) is mounted between the outer raised (32) and the inner movable column (31), which is fixed to the outer fixed (32) mast section. The sliding plate (25) acts primarily against edge pressure at high lift heights.

Such a sliding plate of this type is located in the lower part of the lifting columns (3a, 3b) and is therefore not shown in FIG. However, this sliding plate, in contrast to the sliding plate (25) of FIG. 3, is firmly connected to the inner movable column (31).

EN 206 658 Β moves with its internal movable (31) mast section.

A piston is attached at one end (26) of the hollow piston rod (22). In the piston (26), oil is drawn through the bore (24) in the upper part of the mast (3a, 3b) and causes the lifting column part (31) to rise. The hydraulic lines for the overhead contact wagon are not shown in the drawings in order to better understand the mounting wagon of the present invention, and in the event of breakage, the inner movable mast portion (31), and thereby the working position (4), is lowered at a speed dependent on the size of the bore (24). position.

During lifting or lowering movements, the end position of all movable inner (31) lift column sections is secured by a fixed roller chain (21), with its upper end (27) rigidly mounted on the support assembly and (28) on the upper end of the inner movable (31) lifting column portion. connected. The other end of the fixed roller (21), which is no longer shown in FIG. 3, is rigidly connected to the lower foot portion of the inner movable (31).

For example, if oil is pressed through the hollow piston rod (22) and the hole (24) of the piston (24) in the upper part of the lifting column (3a, 3b) to raise the workstation (4), the inner movable mast portion (31) moves upwards, of course. . At the same time, the fixed roller chain (21) will also move upward, forcing the shaft (19) to rotate clockwise through the rigid sprocket (29). While the inner movable mast portion (31) and the working station (4) are moved upward, the other lifting column coupled through the shaft (19) is the same: its internal movable mast section will also move upwards.

In the approximate half-line of the distance between the two masts (3a, 3b), the non-crossed or cross-guided roller chain is formed through the first (19) axis and the secondary shaft sprocket mounted on the second axis to form the first (19) axis and between the second axis. The opposing sprockets on the axle (19) and the other axle are rotated in the opposite direction when using a non-crossed chain (8a) when the chain is crossed (8b). Since the pairs of coupling masts (3a, 3b) are always mirror-symmetrical with each other, the direction of rotation of the sprockets (29) ensures that all four of the movable lifting columns (31) are simultaneously raised or lowered at the same speed, so that the lifting member (31) is raised. The distance traveled by column sections is the same.

By means of the shape-conveying force transmission implemented by the chain drive, the workstation (4) will always be parallel to the reference plane without the need for an additional parallel inlet to provide this.

Claims (10)

An overhead wire trolley with a fixed work platform with lifting means, characterized in that the height adjustment of the working position (4) is carried out by four telescopically superimposed hydraulically actuated masts, each of which is mounted on a fixed, vertically arranged sprocket (29). and is adjusted by means of a roller chain (21) running on two pressure rollers (20), and wherein the sprockets (29) for the two masts (3a, 3b) are pivotally mounted on an axis (19) and each shaft has an additional sprocket (29). mounted rigidly, and the first shaft (19) is connected to the second shaft (19) via a chain (8a, 8b). (Priority: December 12, 1989) The overhead rack assembly according to claim 1, characterized in that the work station (4) is equipped with more than four, preferably even, number of masts (3a, 3b), each shaft (19) having a chain (8a, 8b) followed by a shaft (8a, 8b). 19) is connected. (Priority: December 12, 1989) An overhead guide car according to claim 1 or 2, characterized in that a plurality of auxiliary sprockets (29) are rigidly wedged on each shaft (19), each of which engages a drive link (8a, 8b). (Priority: December 12, 1989) 4. An overhead trolley assembly vehicle according to any one of claims 1 to 4, characterized in that the chains (8a, 8b) connecting the axes (19) are intersected in the form of 8. (Priority: 08/28/1989) 5. An overhead trolley assembly car according to any one of claims 1 to 3, characterized in that the masts (3a, 3b) are mounted on an overhead carriage (2) fixed on a bogie (12). (Priority: 12.05.1989) 6. An overhead line trolley according to any one of claims 1 to 4, characterized in that the working position (4) is provided with at least one laterally horizontally extendable leveling platform extension (14). (Priority: Aug 24, 1989) 7. An overhead trolley assembly vehicle according to any one of claims 1 to 3, characterized in that the working position (4) is surrounded by an inwardly or outwardly extending rail (17). (Priority: August 24, 1989) 8. An overhead assembly car according to any one of claims 1 to 3, characterized in that the first shaft (19) is driven by a power train and the subsequent shaft (s) (19) is driven via a chain or chains (8a, 8b). (Priority: Aug 24, 1989) The overhead line carrier according to claim 8, characterized in that the torque transmission chains (8a, 8b) are intersected in the form 8. (Priority: 08/24/1989) 10. An overhead line trolley according to any one of claims 1 to 4, characterized in that each chain (8a, 8b) and roller chain (21) are associated with a fracture detection device activating a lifting block (3a, 3b) blocking system. (Priority: Aug 24, 1989)