FI111624B - Platform for a double beam gantry crane - Google Patents

Description

111624

BACKGROUND OF THE INVENTION The invention relates to a platform for a double-girder bridge crane for heavy nos-5 turntable equipment comprising at least eight crane wheels.

The lighter crane bridges for double girder cranes move on platforms with four crane wheels, while the crane bridges for heavy crane equipment move with eight wheels, each of which has 10 wheels in four wagons. The heaviest double-girder bridge cranes are supported on each crane base rail for up to four wagons, each with two wheels. In this case, the wheel weights are as uniform as possible for each end cross member. Thus, DE-OS 2 214 680 discloses a two-beam crane three-point crane bridge with eight wheels per rail. The two wheels are then always placed in one carriage. One rail is always provided with two carriages and one crane beam, whereas the other rail 20 has, in addition to two such crane wheeled carriages, a dumper which is operatively connected to the crane beam. Thus, both crane-bridge beams are supported statically at three points.

, 25 To ensure proper movement of the crane • On 1 rails, the wheels must be oriented exactly. In this case, it is essential that the bearings on the crane bridge are drilled very carefully, which again results in high machining costs.

30 The large dimensions of such a crane require that it be dismantled after its completion at the factory so that it can be transported to its intended place of use.

At this point, the present invention will assist.

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It is therefore an object of the invention to construct a double girder bridge crane so that the wheel bearings can be placed in a simple manner on the crane body and without high mechanical precision requirements for the chassis.

This object is achieved by the structural features set forth in the preamble of the first claim.

The distance between the crane wheels is so great that the load is evenly distributed.

10 The gantry crane is driven by wheels arranged in its four outer corners. The horizontal forces are transmitted by the support wagons located inside. In split end transverse beams, only simple through holes are required for connection to the support carriages. These through-holes 15 need not be subject to high requirements for the precision of mechanical machining. Counter-drilling and bearings for the wheels and outer wheel supports of the support cars can be made in the machining center regardless of the crane bridge. When the end transverse beams are split, the bridge crane is dimensioned for transport from the crane manufacturer to the site of use. When connecting the crane halves, only bolt connections to the intermediate wagons need to be made. Otherwise, advantageous transport dimensions are achieved in double-girder bridge cranes only by the use of expensive, specially arranged separation points.

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Preferred embodiments of the invention are set forth in the dependent claims.

The invention will now be explained in more detail by way of a structural example and with reference to the accompanying drawing. In it 30, Figure 1 shows a side view of a double-girder bridge crane and • »i>.

Figure 2 shows a side transverse and plan view of the end transverse beam of Figure 1.

The double-beam bridge crane 35 shown in Figures 1 and 2 comprises two beams 1a and Ib and end transverse beams 2 located on either side 3111624. The end transverse beams 2 again comprise two halves 2a and 2b. These end-beams friction beams 2a and 2b are welded to the respective beams 1a and Ib.

5 The double-girder bridge crane moves on its wheels 3 on rails 4 of the crane track. The drawing does not show an actuator nor any other details irrelevant to the present invention. In each of the beams la and Ib are arranged longitudinally rails 5 for a running cat.

The four wheels 3 at each angle are mounted in separate wheel housings 6a and 6b. These wheel housings 6a and 6b are fixed at one of the pivot points by the bolt connection 7 to the outer surfaces of the half-beams 2a and 2b of the end transverse beam 15 in the driving direction and further secured by screws 8. This pivot point is arranged to support the torque generated by the wheel pressure. The screws 8 are preferably screws or HV screws. The wheels 3 are placed in angular bearings 9. This structure and the required mounting head allow for an economical installation and trouble-free repair of worn wheels 3. These wheel housings 6a and 6b are also fitted with lifting structures 10 and a crane bumper 11.

Between both end transverse beam halves 2a and 2b 25, a support carriage 12 is provided. The length of this support carriage 12 is determined such that the wheel spacing 3 is such that the wheel loads are distributed as evenly as possible. The support carriage 12 is provided with articulated bolted joints 13 on both sides. These bolted joints 13 provide for the transfer of forces, including crane and running cat buffing forces, arising from crane travel movements.

Below the support car 12, there are angular bearings 9 of the wheels 3 on both sides thereof. However, a pivot-35 bolt connection and a wheel 3 are provided vertically. However, this is not absolutely necessary 4 111624. Other arrangements are also possible which guarantee full operational capability.

Although the two-beam bridge crane at four corners; indeed, using wheel flanges or smooth wheels 5 in combination with vertical guide rollers mounted on wheel housings 6a and 6b, wheels 3 of the carrier trolley 12 could theoretically be made without track control elements. In the construction example, the wheels 3 were also provided with wheel flanges so that the same structure can provide an inexpensive spare part service.

Unlike already known crane platforms, where crane structure bearings have to be machined on large special machines, holes for pivot joints are required for both end transverse beam sides 15a and 2b, and the wheel bearings 6a and 6b have angular bearings and support bearings only. lastuamiskoneet.

After mechanical machining, both end-beam halves 2a and 2b can be welded to the main beams 1. There is no need for a detachable-20 connection, since the transport dimensions are advantageous due to the split structure.

The control ratio I / a set out in the relevant crane building ordinance DIN 15018 - Cranes, Principles for Steel Support Structures - where I tar-25 means track gauge and a track center distance, applies to four wheels 3 located at the corner of a double-girder bridge crane. For this purpose, the support carriage 12 and its bearings for bolted connections are preferably dimensioned depending on other dimensions.

30 Once the double-girder bridge crane has been completed at the site, the track gauge of the crane platform and crane track will be measured once more. If both dimensions exceed 1 specified tolerance, the track gauge of the crane is changed. Technical equipments are then used with equalizing discs between the wheel housing 6a and 6b and the wheel bearing, which are of similar strength.

Claims (7)

5 111624? 1. Chassis for a double-girder bridge crane with at least eight wheels (3), characterized in that the two end transverse beams (2) are divided in the area of their vertical center lines, and each end transverse beam half (2a and 2b) is provided with outermost respectively, with one hole for the bolt-10 connection (7 and 13) of the wheel supports, and the wheels (3) being separate wheel housings (6a and 6b) at the four outer corners of the two-beam bridge crane connected at one pivot point by bolt connection (7) 2), wherein the pivot point is arranged so that the torque generated by the pressure of the wheel-15 is supported by the clamping force and the separate wheel housings (6a and 6b) are further secured by a screw connection (8) and a support carriage is provided between the two transverse beam halves (2a and 2b). (12) as a second type of wheel support with ka a crane wheel (3) arranged in a row in the driving direction 20 and a pivot bolt joint (13) between the support carriage (12) and the end transverse beam half (2a and 2b) respectively. Platform for a double-girder bridge crane according to claim 1, characterized in that separate wheel housings (6a and 6b) are provided for the crane buffer (11) and the riser structures (10). Platform for a double-girder bridge crane according to claim 1, characterized in that the articulated connections (13) arranged between the support trolleys (12) and the end transverse beam halves (2a and 30 2b) are designed to transfer all the forces generated by the crane and the running cat. driving movements, including crane and running cat bumper power. Platform for double-girder bridge cranes according to claims 1 and 3, characterized in that in each of the support carriages (12) the axes of the crane wheel (3) and the bolt connection (13) are superimposed. Platform for double-girder bridge crane according to claims 1, 3 and 4, characterized in that the bolt connections (13) between the end transverse beam half (2a and 2b) and the support trolley (12) are designed to control the ratio i / a according to DIN 15018. for where I is the track width of the wheels (3) and a is the center distance of the track control, the center distance a of the outer crane wheels (3) is used. 6. A platform for a double-girder bridge crane according to claim 1, characterized in that, as a track control of the crane, also the horizontal guide rollers can be connected to separate wheel housings (6a and 6b). A platform for a double-girder bridge crane according to claim 1, characterized in that after the manufacture of the double-girder bridge crane at the place of use, technical means, known per se, for correcting the track gauge in a limited area are provided. 1 {7 f 111624