CZ303374B6 - Shiftable mechanism comprising ground wheel and intended particularly for transportation of structures - Google Patents

Abstract

In the present invention, there is disclosed a shiftable mechanism comprising a ground wheel, wherein the shiftable mechanism is intended for transportation of structures. The ground wheel (A) of the mechanism is fastened through the mediation of a cantilever bracket (B) on a thrust and radial bearing (6), wherein said thrust and radial bearing (6) is slidably mounted along with a thrust bearing (5) and a thrust bearing (5) upper plate (4) on a pivot pin (1). The pivot pin (1) forms a part of the structure being transported and is provided with a cam rotating about a fixed point (2) on the pivot pin (1) for height adjustment of the shiftable mechanism relative to a dead stop (7) fixedly coupled with the pivot pin (1).

Description

Technical field

The present invention relates to a displacement device arrangement for devices which require safe travel disengagement and subsequent displacement of the displacement device to a selected position relative to the device itself.

BACKGROUND OF THE INVENTION

The traveling wheels used so far are solved in two ways:

- The drive wheel is permanently loaded, the load capacity is limited by bearings and the drive is disengaged by the15 brake. The advantage is the simplicity of the solution. The disadvantage is the permanent load of the bearings and pins of the travel wheel. This results in a failure rate of this part and increased maintenance requirements or the need for significant oversizing at the expense of value, ie utility value.

- The travel wheel is moved together with the auxiliary pin and the thrust bearing from the travel position and the device itself rests on the auxiliary stop after the travel has been disengaged. The stop is mounted on the device outside the traveling wheel assembly. The main disadvantage of this solution is the large unloading of the wheel from its anchorage to the transported structure itself. Furthermore, the need for an auxiliary stop and the location of the wheel to be moved outside the plan of the transported structure.

SUMMARY OF THE INVENTION

These drawbacks are overcome by a sliding wheel which, unlike US6591449 or US4747I80, moves over a vertical pin which is part of the transported structure. This pin is both the ground and the pivot pin. The travel wheel connected to the axial-radial bearing is moved along this pin. The dual function of the vertical pin eliminates the need for an auxiliary stop. Moving itself is possible not only by eccentrics, but also by lever or hydraulic transmission, which depends on the specific application. Important is also the possibility of the structural placement of the movable travel wheel in the plan view of the transported structure and the subsequent possibility of adjusting the travel travel wheel after relieving it to the selected position.

Overview of the figure in the drawing

The drawing shows a side view of the housing of the transfer device showing the braked and released positions.

EXAMPLE 45

The vertical pin 1 of circular cross-section is a fixed part of the transported structure. A fixed point 2 is mounted on the vertical pin 1, which in the illustrated case carries an eccentric 3. The upper plate 4 of the thrust bearing 5, the thrust bearing 5 and the thrust bearing 6 are mounted slidingly on the vertical pin. and the wheel A itself. The vertical pin 1 is provided with a stop 7.

In the braked state, the silo F is directly transmitted by the vertical pin, despite the stop 7, to the plane of the base 0. Movements I .. II. and IH. they are not limited by any force. In the mobile state it is in the direction of movement IV. the force F is transmitted from the vertical pin I to the fixed point 2 by means of the eccentric 3 shown.

This displaces the upper plate 4 of the thrust bearing 5, and the thrust bearing 6 with the fixed cantilever B and around A along the vertical pin by the length L, the stop 7 being lifted above the plane 0.

Industrial applicability

The shifting device according to the invention can be used wherever occasional transport of heavy equipment is required, which must be stable in the operating position and where it is required to position the wheel itself in the desired position in the braked position. Examples include hospital beds, sports equipment and work tables for variable workplaces.

PATENT CLAIMS

Claims (1)

sports equipment or work tables for variable workplaces. 15 PATENT CLAIMS A transfer device comprising a traveling wheel and intended for transporting structures, the wheel (A) being fixed over the cantilever (B) to an axial-radial bearing (6), the axial-radial bearing 20 ko (6) being together with the axial bearing (5) ) and the upper plate (4) of the thrust bearing (5) is slidably mounted on the vertical pin (1), characterized in that the vertical pin (1) is part of the transported structure and is provided with a cam rotatable around a fixed point (2) on the vertical pin (1), for height adjustment of the transfer device relative to the stop (7) fixed to the vertical pin (1).