SU1164202A1 - Telescopic boom - Google Patents

Description

The invention relates to a telescopic crane booms, in particular, to the structures of the support devices of the sections of telescopic booms.

The purpose of the invention is to raise 5

convenience of operation.

FIG. 1 schematically shows a telescopic boom in the working position; figure 2 - the same .in the transport position; on fig.Z - section 10 aa in figure 1; figure 4 - section bB in fig.Z; in fig. 5 - node I ka fig, 1; figure 6 - section bb In Fig 5; 7. - type G figure 5. ·

The telescopic boom contains 15 supporting devices located on the shelves of sections, for example, pull-out section 1, each of which includes supporting elements 2 installed in housings 3> tank 4 with 20 lubricant, through pipe 5 connected to a lubricant supply system (not shown ), channels 6, connecting friction surfaces with a reservoir, 25 piston 7, rod 8 with stop 9, spring 10, stem stroke limiter 11 mounted on the 'surface 12 of the mating section, laid on guides 13, gaskets 14 of elm o-yn 30 rugogo material.

During operation of the telescopic boom, the inner movable section 1 periodically performs reciprocating movement relative to the surface 12 of the mating outer section, respectively, the elements of the friction unit of the telescopic boom move each other. 40

Automatic lubricant supply to the friction surface is carried out as a result of the impact of a pre-compressed spring 10 '45

(Fig.5) on the piston 7 when moving the movable section, the spring preload is provided in the transport position of the telescopic boom, when the stop 9 abuts 50 against the rod stroke limiter 11.

In the process of moving the telescopic boom section (Fig. 1), the spring 10 (Fig. 5) presses on the piston 7, as a result of which the latter, moving, affects the volume of lubricant in tank 4. Thus, a forced automatic lubricant supply from reservoir through channels 6 on the friction surface.

In the transport position of the telescopic boom (Fig. 2), with the movable section fully extended, the anvil stop 9 (Fig. 5) of the rod 8 abuts against the rod stroke limiter 11, as a result of which the piston 7 retracts to the extreme position corresponding to the initial displacement reservoir.

Due to the fact that the piston 7 and the spring 10 are retracted to a fixed position and the spring is in the compressed state, the automatic supply of the lubricant to the friction surface under the influence of the spring 10 stops.

When connecting the pipeline 5 with the lubricant supply system, an additional lubricant supply into the reservoir cavity is possible in the boom transport position, which can be controlled directly from the cab from the control panel of the crane installation.

In the absence of a lubricant support supply system for lubricants, an additional lubricant supply to the cavity of the tank, compensating for the amount of lubricant deposited on the friction surface, is carried out periodically with the movable telescopic boom section extended and the rod retracted to the extreme position, thereby establishing the initial working volume of the tank. In this case, after additional supply of lubricant into the cavity of the tank, the pipeline is closed with a screw cap.

1164202

10 11 d

Mr.-.- / // Ζ ” 7

FIG. 2

AA 2 3

Fig.Z

—12 7 1310 8 9

5

.1164202

FIG. 6

Claims (1)

TELESCOPIC BOOM,. containing fixed and sliding sections, supporting elements located between these sections, devices for lubricating the contacting surfaces of sections and supporting elements, including tanks: with channels, characterized in that that, in order to improve the convenience of operation, each tank is equipped with a spring-loaded piston to regulate the supply of lubricant to the contacting ones. the surfaces of the said sections and supporting elements with an abutment mounted on the end of its stem, and the boom is equipped with the stroke limiters of said piston; One of which is mounted on the top of the inner wall of the fixed section, and the other on the lower outer wall of the sliding section with the ability to interact with the piston stop, while the tank is made with a pipeline for supplying lubricant. (61) 05 > 1 1164202