TELESCOPIC MAST

Abstract

There is disclosed a telescopic mast including one or more telescopic members with parallel walls. One of two adjacent telescoping sections is narrower than the other of the two adjacent telescoping sections such that a telescoping section can be moved into and out of, respectively, of a surrounding telescoping section in a telescopic member. This surrounding telescoping section can be moved into and out of a further telescoping section in a further telescopic member. In the one telescoping section in a telescopic member there is provided a guide rail running in axial direction of the telescoping section. Between each of two adjacent telescoping sections in a telescopic member there is provided at least one spacer means arranged for keeping the telescoping sections apart and controlling their mutual movement. This means includes a mounting fitting fastened to the second telescoping section in a telescopic member and a flexible sleeve mounted in the mounting fitting. In the flexible sleeve is fitted a slide shoe that includes a pin for engaging the flexible sleeve, and a groove arranged for engaging the guide rail.

Claims

1. A telescopic mast comprising: at least two telescopic members (2) with parallel walls, each of the telescopic members including three adjacent telescoping sections, the first telescoping sections is narrower than the second telescoping sections, the first telescoping section configured and arranged to move into and out of the second telescoping section, the second telescoping section configured and arranged to be moved into and out of a third telescopic member; a guide rail positioned within one of the telescoping sections and running in an axial direction of the one of the telescoping sections; at least one spacer means arranged between each of the three adjacent telescoping sections, and configured and arranged for keeping the telescoping sections apart and controlling the respective mutual movement of the telescoping sections; a mounting fitting fastened to the second telescoping section; a flexible sleeve mounted in the mounting fitting; and a slide shoe mounted within the flexible sleeve, the slide shoe including a pin configured and arranged for engaging the flexible sleeve and a groove arranged for engaging the guide rail.

2. The telescopic mast according to claim 1, characterised in that the guide rail in each telescopic member is provided on an inwardly facing side of the one telescoping section, and that the mounting fitting is provided on an outwardly facing side of the second telescoping section.

3. The telescopic mast according to claim 1, characterised in that the flexible sleeve is made of a flexible material such that the slide shoe is configured and arranged to be displaced radially or axially relative to a central axis through the mounting fitting.

4. The telescopic mast according to claim 1, characterised in that the flexible sleeve includes a mounting hole configured and arranged for receiving the pin of the slide shoe, and the pin of the slide shoe is configured and arranged to rotate in the mounting hole.

5. The telescopic mast according to claim 1, further including three or more guide rails distributed along the periphery of each of the telescopic members.

6. The telescopic mast according to claim 5, further including, for each guide rail, two or more spacer means distributed in axial direction of the one or more telescopic members.

Description

DESCRIPTION OF THE DRAWING

[0033] The invention is described in more detail with reference to the drawing, wherein:

[0034] FIG. 1 shows a section through a telescopic member in telescopic mast according to the invention in which a guide rail interacts with a spacer means disposed on each their telescoping section in a telescopic member;

[0035] FIG. 2 shows a cross-section through one telescoping section with a guide rail running in axial direction of the telescoping section;

[0036] FIG. 3 shows a section through a spacer means intended for being provided on the other telescoping section in a telescopic member; and

[0037] FIG. 4 shows a schematic drawing of a telescopic mast mounted on a vehicle.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

[0038] FIGS. 1-3 show various sectional views of the same design.

[0039] FIG. 1 shows a telescopic mast 1 appearing with a section through a single telescopic member 2. The telescopic member 2 comprises a first telescoping section 3 and a second telescoping section 4. The telescoping section 4 has smaller dimension than the first telescoping section 3 such that the second telescoping section 4 can be moved in over the first telescoping section 3 in the telescopic member 2. It is possible to provide a third telescoping section 17 (see FIG. 4) around the shown telescopic member, or a further telescoping section (not shown), which is disposed within the shown telescopic member 2.

[0040] In the shown embodiment, the telescoping sections 3 are designed with oval cross-section. Alternatively, the telescoping section can be provided with other cross-sectional shapes, e.g. circular.

[0041] As it appears more clearly on FIG. 2, at an inner side 5 of the first telescoping section 3 there is provided a guide rail 6. The guide rail 6 runs in axial direction in parallel with a central axis of the telescopic member 2. The central axis is indicated by 7.

[0042] FIG. 3 shows a spacer means 8, which is also shown in FIG. 1. The spacer means 8 is intended for mounting on the other telescoping section 4. The spacer means 8 comprises a mounting fitting 9 provided with an inner cavity 10. In the cavity 10 a resilient sleeve 11 is provided. The resilient, elastic sleeve 11 has a hole 12. A pin 13 from a slide shoe 14 is received in the hole 12. The slide shoe 14 includes also a groove 15 dimensioned such that it can interact with the slide rail 6. The pin 13 is mounted rotationally in the hole 12 for rotation about a central axis 16 through the mounting fitting 9.

[0043] In the shown embodiment there is only one sectional view showing a mounting means 8. However, several mounting means 8 interacting with the guide rail 6 may be provided along the length of a telescopic member 2.

[0044] Moreover, in the telescopic member 2 there may be provided several guide rails 6 that are distributed along the periphery of the one telescoping section 3. This is not shown, but the guide rails 6 will be evenly distributed along the periphery in a number that may be three or more such that a centring of the second telescoping section 4 inside the first telescoping section 3 is achieved.

[0045] FIG. 4 shows that the telescopic member 2 is disposed inside a third telescoping section 17. The telescopic mast 1 is mounted on a vehicle 18. The vehicle 18 is provided with wheels 19, but may alternatively be provided with tracks. A payload 20 is provided at the top of the telescopic mast 1. This payload 20 may, for example, be antenna equipment, surveillance equipment, lamps, weapons or other equipment.