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A bearing in connection with a boom

A technology of bearings and sliding bearings, which is applied in the direction of linear motion bearings, bearings, shafts and bearings, can solve problems affecting the positioning accuracy of rock drilling machines, and achieve the effect of saving money in processing

Active Publication Date: 2008-11-26
EPIROC ROCK DRILLS AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Voids can affect positioning accuracy of rock drilling rigs

Method used

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  • A bearing in connection with a boom
  • A bearing in connection with a boom
  • A bearing in connection with a boom

Examples

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Embodiment Construction

[0026] Several embodiments of the present invention will be described below on the basis of the accompanying drawings.

[0027] Figure 1 shows one field of application of a support according to one aspect of the invention. A boom 1 of the type according to the invention is flexibly arranged (or configured) in relation to a carrying device 2 for the boom. The working cylinder body 3 is flexibly connected with the carrying device 2 and the cantilever, so that the cantilever 1 is vertical. At the end of the boom 1 an example of a rock drilling rig 4 operated by the boom 1 is shown. The rock drilling equipment is of a known type and it will not be described further here.

[0028] When manipulating and drilling the rock drilling equipment, the cantilever 1 needs to be extended to position the drilling equipment. For this purpose, the boom 1 is telescopically extendable and is equipped with an outer arm 5 and an inner arm 6 . The outer arm 5 comprises, for example, or consists o...

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Abstract

The invention discloses a bearing related to a telescopically extensible boom (1), comprising an outer arm (5) with a front end and an inner arm (6) which is arranged in the front end and can be moved axially inside the outer arm (5). The outer arm and the inner arm comprise square tubes. Flat surfaces of the inner arm (6) extend along corresponding flat surfaces of the outer arm (5), and the boom (1) has four longitudinal sides. The bearing comprises a bearing box (10) designed as a casing with four walls (10a to 1Od) which together form a square tube structure. The bearing box (10) comprises a plurality of sliding bearings (l1a to 11d, 12a to 12d) and is inserted into the front end of the outer arm (5) between the outer arm (5) and the inner arm (6). The sliding bearings (l1a to 11d, 12a to 12d) are arranged in the walls (10a to 1Od) of the bearing box (10) and are applied against the corresponding flat surfaces of the outer arm (5) and the inner arm (6), wherein the flat surfaces extend along each other. Arranged adjustment devices (15, 20, 17a to 17c) which are related to at least one wall (10a to 10c) and are axially arranged are used for adjusting the gap between at least one sliding bearing (11a to 11c, 12a to 12c) and the applied surfaces of the inner arm (6) and the outer arm (5).

Description

technical field [0001] The present invention relates to abearings associated with telescopically extendable booms. In particular, booms as described herein relate to booms associated with rock drilling machines for supporting rock drilling equipment. Background technique [0002] The use of a jib of the type described here is associated, for example, with a drilling rig which may comprise a carrying device provided with the jib described above on which rock drilling equipment is arranged. The carrying device may be provided with a plurality of such booms. Drilling rigs of this type are known and will not be described here. In order to increase the accessibility and reach of drilling equipment on such booms, a telescoping device is often used to make the boom extendable. Such devices are referred to herein as telescopically deployable. This means that the cantilever has two or more arms which are axially displaceable relative to each other. [0003] According to the prio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/02F16C25/02F16C29/12
CPCF16C29/02B66C23/707B66C23/701E21B7/02F16C25/02F16C29/12
Inventor F·萨夫
Owner EPIROC ROCK DRILLS AB
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