EP1553042B1 - trolley running on two rails with a winch - Google Patents

Abstract

The double rail travelling trolley has a first running gear carrier (301) connected to a second running gear (302) by a cross beam (303). Lifting gear (304) is fastened on the side of cross beam between the running gear carriers in such a way that the lifting gear does not protrude above the running gear carriers. The cable drum (305) and cable end fastening (309) of the lifting gear are located on one side of the cross beam and an upper block and tackle (308) on the opposite side.

Description

The invention relates to a double-rail trolley, in particular overhead double trolley with a first and a second chassis support, which are movable over wheels on a running rail and form a 3-point storage, wherein the first chassis carrier is connected to the second chassis carrier by means of a cross member approximately centrally and wherein the first chassis carrier has a greater longitudinal extent than the second chassis carrier, and with a hoist mounted on the cross member.

Such two-rail trolleys usually consist of two interconnected chassis beams that form such a frame and by means of partially driven wheels are each movable on opposite rails of the crane girders of a crane construction and have a hoist for lifting loads.

The hoist includes in addition to the cable drum, their drive, transmission and storage, and electrical control usually sub, top bottles and a load hook or gripper in a manner known to those skilled.

The hoist can be mounted at the top, approximately in the middle on a connecting the chassis carrier cross member, as is clear from the DE 1,938,831 and DE 6 608 185 is known.

In the from the DE 1,938,831 and DE 6 608 185 However, known double rail trolleys, the overall height is greatly increased by the attachment of the hoist on or above the landing gear.

The DE 944 330 In contrast, discloses a two-rail trolley, in which the hoist or the cable drum is disposed between the chassis beams and forms the cross member to their connection. In this trolley, a suspension shaft for two driven wheels leads through the cable drum, at one end of a head carrier is arranged, which carries a further impeller, which serves to guide the cat. The height of the cat above the rails of the crane girders is not greater than the height the chassis carrier itself. The chosen construction of the hoist is complex and the cat sensitive to distortion and tilt under load.

The object of the invention is therefore to provide a two-rail trolley with 3-point storage, whose height above the rails of the crane girder is as low as possible and at the same time ensures good accessibility to the essential components of the hoist. In addition, the distance between the rails of the cat should not be increased and load the load as evenly as possible.

This object is achieved by the reproduced in claim 1 invention. Advantageous embodiments of the invention are set forth in the dependent claims 2 to 13.

The fact that the hoist is mounted laterally between the truss girders on the cross member so that the hoist does not protrude substantially above the landing gear, it is ensured that the height above the rails of the crane girder is not increased.

The fact that the cable drum and the Seilendbefestigung the hoist on one side and the upper bottle on the opposite side of the cross member - are arranged in the direction of travel, the weight of any counterweights can be reduced and the torsional load of the cross member can be minimized.

Important in double rail trolleys the overall height and in particular the height of the chassis beams or the frame and the hoist. With regard to the size of the wheels, the trolley trolleys have a certain minimum height above the level of the rails on the crane girders, which is kept as low as possible, so that the overall height of the crane can be minimized. This is necessary, inter alia, for weight, space and cost reasons.

It is advantageous if the load hook or the like is centered as far as possible within the distance of the chassis support to each other, so that the overall structure and in particular the wheels are loaded evenly under load, which in turn is of weight saving reasons of interest and is accompanied by a reduced design effort , However, it should be noted that when using single-drum rope drums, the cable drain point on the drum moves between two positions, namely the highest and lowest load position or height. Furthermore, regulations for the dimensioning of the rope drives and constructive minimum requirements for free measurements to neighboring components must be observed.

For commissioning and maintenance or repair, it is necessary to ensure easy and good accessibility to the hoist. In particular, it must be prevented that the cable drum, its drive, transmission and storage and electrical control is hindered or limited by the adjacent chassis beams.

If the first chassis carrier is connected to the second chassis carrier by means of the cross member approximately centrally and further comprises the first chassis carrier has a greater longitudinal extent than the second chassis carrier and thereby projects the hoist in the direction of travel beyond the second chassis carrier out, so accessibility you are the essential components of Hoist in a simple manner possible.

It is advantageous if z. As the gear and / or the cable drum and / or the electrical control of the hoist, so its essential components are arranged on the side facing the second chassis support. Here, it is advantageous to arrange the hoist as far as possible in the direction of the second chassis carrier on the cross member, so that its accessibility is further improved. The maintenance can therefore be carried out by the crane girder.

In particular, it is advantageous if all wheels or their axes are arranged symmetrically to the gravity axis of the payload, wherein the wheels of the first chassis carrier as large a distance and the wheels of the second chassis carrier have a small distance.

So the second chassis support can be made very short and access to the hoist is not hindered.

The second chassis carrier can be configured with only one impeller. However, this depends on the planned operating conditions and the payload to be transported. The permissible load of the impeller and its attachment to the chassis girder must not be exceeded during operation.

If larger payloads are moved, the use of two wheels offers. These can be rigidly or advantageously connected via a rocker with the chassis support. The use of a rocker is useful by forming a 3-point storage of the trolley on the crane girders and allows z. B. the compensation of manufacturing tolerances.

The usual use of only one driven impeller often causes a skew of the trolley. However, this skew can be prevented by using horizontal guide elements, in particular arranged at the ends of the first chassis carrier guide rollers, which are laterally supported with little play on the rails.

The usual, in known, driven friction rollers using constructions have disadvantages because they are very expensive due to the friction roller drive and require a lot of space. In addition, the wear behavior of the cooperating driven wheels and friction rollers is different, whereby the rolling radii change differently, which in turn leads to additional slippage of the less loaded wheel.

Such lifting must be avoided in order to prevent damage to the trolley and / or the carrier and to prevent slippage of the driven wheels.

If at least one impeller is drivable and at least one pair of friction rollers cooperating with the driven impeller is arranged on the underside of the running rail, which can be adjusted by adjusting the distance from one another to the underside of the running rail, a slipping z. B. be prevented by lifting the driven wheel.

Due to the inventive design of the traction roller serving as a non-driven pair of friction rollers, it is possible to design the friction roller construction in a particularly lightweight and compact and thus space-saving manner, since drive of the friction rollers has been dispensed with.

Advantageously, the two friction rollers of each friction roller pair are arranged symmetrically to the axis of rotation of the respective driven impeller below the impeller.

In a preferred embodiment, for this purpose each pair of friction rollers is fixed via a support rod to the respective chassis carrier.

The support rod can in this case comprise two pivotable about a common axis two-armed lever, wherein at a free end of each lever, a friction roller is rotatably mounted.

The other two free ends of the levers of the support rod are then conveniently connected to each other via a spring-loaded pressure mechanism consisting of a screw connecting the two free ends of the lever and one can be placed on the screw and tensioned by a nut compression spring.

In a preferred embodiment, the support linkage of each pair of friction rollers is pivotably mounted on a shaft arranged transversely to the travel direction on the first chassis carrier.

Fig. 1

eine Ausführungsform einer erfindungsgemäßen Zweischienenlaufkatze mit Hubwerk in einer Ansicht von oben;

Fig. 2

die Ausführungsform aus Fig. 5 in einer Seitenansicht;

Fig. 3

einen Querschnitt entlang der Linie "B-B" aus Fig. 2;

Fig. 4

eine zweite Ausführungsform einer erfindungsgemäßen Zweischienenlaufkatze mit Hubwerk in einer Ansicht von oben;

Fig. 5

die Ausführungsform aus Fig. 4 in einer Seitenansicht

Fig. 6

eine Anordnung eines Reibrollenpaares zur Verhinderung des Abhebens des angetriebenen Laufrads aus den Ausführungsformen der Fig. 1 und 3 und

Fig. 7

einen Querschnitt entlang der Linie "A-A" aus Fig. 6.

Further details, features and advantages of the present invention will be explained below with reference to the drawing. They show schematically:

Fig. 1

an embodiment of a double-rail trolley according to the invention with hoist in a view from above;

Fig. 2

the embodiment of Fig. 5 in a side view;

Fig. 3

a cross section along the line "BB" from Fig. 2 ;

Fig. 4

a second embodiment of a double-rail trolley according to the invention with hoist in a view from above;

Fig. 5

the embodiment of Fig. 4 in a side view

Fig. 6

an arrangement of a friction roller pair for preventing the lifting of the driven impeller from the embodiments of Fig. 1 and 3 and

Fig. 7

a cross section along the line "AA" from Fig. 6 ,

In the figures, corresponding parts of the different embodiments of the two rail trolleys 300 and 400 according to the invention are each marked with reference numbers increased by 100.

The structure of the double rail trolley according to the invention will now be described with reference to Figures 1 and 2 explained in more detail. In the following, only the differences between the individual embodiments will be explained.

Figures 1 and 2 show a top running two rail trolley 300 according to the invention, comprising a first chassis carrier 301 and a second chassis carrier 302, which are each connected centrally by means of a cross member 303. In the direction of travel V of the two-rail trolley 300 in front of or behind and laterally on the cross member 103, a hoist 304 is arranged. The first chassis carrier 301 has two wheels 313 and 315, of which the impeller 313 is provided with a drive 314 for moving the trolley in the direction of travel V on the rails 312 of the crane girder 311. The axes of the wheels 313 and 315 are arranged one behind the other in the direction of travel V and have a large distance C, so that the wheels 313, 315 are mounted in the region of the beginning and end of the crane girder 311.

For higher payloads, the illustrated embodiment of the two-rail trolley 300 according to the invention, in which the second chassis support 302 has two wheels 316 and 317, which are attached via a rocker 320 to the cross member 303, whereby a statically determined 3-point storage of the trolley 300th is reached, so that it is possible in contrast to the conceivable rigid arrangement to compensate for different levels Aufstandpunkte the wheels 316/317.

The swingarm goes in detail from the FIG. 3 out. It comprises a traverse 321 with two wheel axles 322 for the wheels 316 and 317, which is connected via a pendulum axle 323 with the second chassis carrier 302. The pendulum axis 323 is pivotable about an aligned in the longitudinal direction of the cross member 303 and thus horizontal axis.

The axes of the two wheels 316 and 317 thus have, in contrast to those of the wheels 313, 315 a smaller distance D to each other. The second chassis carrier has in the longitudinal direction just such an extent that the arrangement of the wheels 316 and 317 in the direction of travel V in succession is possible.

Thus, the first chassis carrier 301 has a greater longitudinal extension in the longitudinal or travel direction V than the second chassis carrier 302. Thus, the second chassis carrier 302 does not hinder access to the hoist 304 since it protrudes laterally in the direction of travel V.

The lateral arrangement of the hoist 304 on the cross member 303 is such that the overall height H of the two-rail trolley above the rails 312 is not increased. The upper edge of the hoist 304 thus does not protrude above the landing gear carrier 301 and 302 out. Overall, all parts of the double-rail trolley according to the invention are arranged so that they do not protrude above the upper edge of the chassis support upwards (see. Fig. 2 ).

The cable drum 305 of the lifting mechanism 304 is connected by means of frame parts 306 and 307 with the cross member 303 and rotatably supported between them. In the frame part 307 of the lifting mechanism 304, which is adjacent to the second chassis carrier 302, are the main drive components, such as cable drum bearing, drive, gearbox and electrical control. Due to the positioning of the lifting mechanism 304 off-center on the cross member 303, ie, near the second girder carrier 302 facing crane girder 311 access to these components maintenance and repair friendly without scaffolding is possible. One recognizes, in particular in Fig. 2 in that the access to the frame part 307 of the hoist 104 is not restricted by the second chassis carrier 302.

The cross member 303 also serves to receive or fix a top flask 308 and a cable end attachment 309 of a rope 318 of the hoist 304. The cable 318 is a simple Einscherung of the Seilendbefestigung 309 via a load hook 310, the upper bottle 306 and the load hook 310 on the single-drum cable drum 305 out. Here, the cable drum 305 and the Seilendbefestigung 309 of the lifting mechanism 304 on one side and the upper bottle 308 on the opposite side of the cross member 303 - seen in the direction of travel V - arranged.

Thus, in a small area indicated by the arrow W around the center K of the track width S of the trolley 300, the load hook 310 travels between its lowest and highest lifting positions. This requires a favorable distribution of the load on the two-rail trolley.

In the in the FIGS. 4 and 5 illustrated second embodiment of the double-rail trolley 400 according to the invention, the second chassis support 402 is formed with a further reduced end plate 402, which is made possible by the use of only one impeller 416. This can be more cost-effective and structurally simpler with relatively small payloads, namely, if the permissible load of the end plate 402 does not exceed the permissible compressive stress under the impeller 416 during operation.

Further, horizontal guide rollers 424 are provided in the vicinity of the wheels 413 and 415 of the first chassis support 401, which are mounted on the chassis support itself and supported laterally with little play on the rail 412 of the crane girder 411. As a result, an excessive skewing of the trolley is avoided, which is caused by the commonly used single-wheel drive on the impeller 413.

The following is in detail in the FIGS. 6 and 7 illustrated support roller pair 319, which is used in the embodiments described above.

The trained as a pair of friction rollers support roller pair 319 is provided on the chassis support 301, pivotally mounted under the chassis support and is supported by spring bias on the bottom 326 of the top plate 325 of the crane girder 311, so that slipping of the driven wheel 313 is prevented.

The support roller pair 319 is arranged on a downwardly extending arm 327 of the chassis carrier 301 and comprises two levers 328, which are verscherenkbar scissor-like manner via a pin 330. At the one end of the lever, the individual rollers 329 are rotatably arranged and at the other, opposite free end, the levers 328 are connected via a pressure mechanism 331 with each other. The pressing mechanism 331 causes pivoting of the lever 328 relative to each other so that the distance between the rollers 329 to each other and thus their contact pressure against the bottom 326 of the top plate 325 of the crane girder 311 is adjusted. In this way, the impeller 313 can be pulled with the desired contact force on or against the rail 312 to prevent slippage.

In the example shown, the pressure mechanism 331 consists of a screw connecting the two free ends of the levers 328 332, on which a coil-shaped Spring 333 is fitted, and a nut 334 to adjust the spring 333 in a suitable manner or to tension.

LIST OF REFERENCE NUMBERS

300, 400

Two rail trolley

301, 401

first chassis carrier

302, 402

second chassis carrier

303, 403

crossbeam

304, 404

hoist

305, 405

cable drum

306, 406

frame part

307, 407

frame part

308, 408

upper bottle

309, 409

cable end

310.410

load hook

311, 411

crane carrier

312.412

rail

313, 413

driven impeller

314.414

drive

315.415

Wheel

316.416

Wheel

317.417

Wheel

318.418

rope

319, 419

Pair of support rollers

320

wing

322

axles

323

swing axle

424

guide rollers

325

top plate

326

bottom

327

poor

328

lever

329

role

330

spigot

331

pressing mechanism

332

screw

333

feather

334

mother

A-A

intersection

B-B

intersection

C

distance

D

distance

H

height

K

center

S

gauge

V

traversing

W

Area of the load hook

X

line of sight

Claims (13)

1. Trolley running on two rails and having a hoisting unit (304, 404), in particular an overhead trolley running on two rails,
   having a first and a second running-gear carrier which are able to travel on respective rails (312, 412) by means of wheels (315, 415, 316, 416, 317, 417) and which form a 3-point support system,
   the first running-gear carrier (301, 401) being connected to the second running-gear carrier (302, 402) by a cross-member (303, 403) to which the hoisting unit (304, 404) is fastened,
   characterised in that the hoisting unit (304, 404) is fastened to the cross-member (303, 403) laterally, between the running-gear carriers, in such a way that the hoisting unit does not project substantially beyond the running-gear carriers in the upward direction, and in that the rope drum (305, 405) of the hoisting unit and a fastening which the hoisting unit has for the end of the rope (309, 409) are arranged on one side of the cross-member and a top block (308, 408) is arranged on the opposite side of the cross-member.
2. Trolley running on two rails according to claim 1, characterised in that the gearbox and/or the rope drum and/or the electrical control system of the hoisting unit (304, 404) are arranged on that side which is adjacent the second running-gear carrier (302, 402), in particular in a part of the frame (307, 407).
3. Trolley running on two rails according to either of claims 1 and 2, characterised in that the second running-gear carrier (302, 402) has one wheel (416), or two wheels (316, 317) spaced a short distance (D) apart.
4. Trolley running on two rails according to claim 3, characterised in that the wheels (316, 317) are connected to the running-gear carrier (302) by means of a rocker (320).
5. Trolley running on two rails according to one of the foregoing claims, characterised in that the first running-gear carrier (301, 401) is connected to the second running-gear carrier (302, 402) approximately centrally by means of the cross-member (303, 403).
6. Trolley running on two rails according to one of the foregoing claims, characterised in that the longitudinal extent of the first running-gear carrier is greater than that of the second running-gear carrier and the hoisting unit (304, 404) projects beyond the second running-gear carrier (302, 402) in the direction of travel (V).
7. Trolley running on two rails according to one of the foregoing claims, characterised in that horizontal guiding members (424), and in particular guiding rollers, are arranged at the ends of the first running-gear carrier (401).
8. Trolley running on two rails according to one of the foregoing claims characterised in that at least one wheel (313, 413) is drivable and, arranged on the underside (326) of the rail, there is at least one pair of friction rollers (319) which cooperate with the driven wheel (313) and which can be pressed against the underside (326) of the rail by having the distance between them set.
9. Trolley running on two rails according to claim 8, characterised in that the two friction rollers (319) making up each pair of friction rollers are arranged below the given wheel (313) and symmetrically to the axis of rotation of the wheel (313).
10. Trolley running on two rails according to claim 8 or 9, characterised in that each pair of friction rollers is fastened to the given running-gear carrier (301) by means of a supporting linkage.
11. Trolley running on two rails according to claim 10, characterised in that the supporting linkage comprises two two-armed levers (328) able to be pivoted about a common axis, a friction roller (329) being rotatably mounted at one free end of each lever (328).
12. Trolley running on two rails according to claim 11, characterised in that the other two free ends of the levers (328) of the supporting linkage are connecting together by means of a spring-loaded pressure-applying mechanism (331).
13. Trolley running on two rails according to claim 12, characterised in that the pressure-applying mechanism (331) comprises a screw or bolt (332) which connects the two free ends of the levers (328) together, and a compression spring (333) which can be fitted onto the screw or bolt (332) and which can be placed under load by means of a nut (334).

Images