DE8003299U1 - boom - Google Patents

Description

Re: registration number 50

/ Boom /

The invention relates to a boom, especially for radial drilling machines, which is guided horizontally in a boom housing.

With booms of this type, both a slight displacement with precise guidance and a secure clamping are required.

Attempts have now been made to reduce the effort required when moving the boom by reducing the frictional resistance keep it low by placing the boom in plain bearings has resulted in roles and through appropriate training of the boom its weight without affecting the flexural rigidity has reduced (DP 813474, DP 944593, DP 1477561), too an attempt was made to fix the clamping, partly by mechanical (DP 976137, DP 946501) resp. hydraulic or pneumatic means (G 66θ4564, DP 2044150) to make it safer.

However, none of these attempts were satisfactory because the boom is easy to develop due to the required flexural rigidity Limits were set and because the clamping, even with a combination of mechanical and hydraulic or pneumatic Means, usually acted on the roller bearing (DP 2O4415O) and was therefore unstable /

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Esslinger Bank 13498002 PostscheekljoVitojSiutt ^ art 132736: j! _:

HELLMUT MÜLLER

Dipl.-Jng.

Engineer office

73 Esslingsn-Liebersbronn Camererweg 39 (access: Stöckenbergweg 39) Telephone 0711/373133

and because even with a clamping with support of the boom on the boom housing (DP 946501) the effort is too great because special roles and support elements were required. It is also known (DP 1402999 and P 1477579) to provide this with magnets to relieve weight and / or to clamp the tool carrier (boom), whereby the tool carrier cooperates with a plate-like support element. However, this has the disadvantage that the plate serving as a support element was very large and therefore very expensive. In addition, the work was area very small because it only covered a small sector of the swivel area.

The invention was based on the task of using a suitable system to improve the ease of movement and / or the clamping of the Boom to increase without impairing its rigidity and also to reduce manufacturing costs. For this purpose, the boom housing serving as the support element, and not the tool carrier, is at least a unit is provided, which is used to apply the pressure of the boom to its guide and thus the displacement force to reduce. In addition, with the unit designed as a magnet, the boom can be reliably clamped without Load on the guide elements, which are therefore particularly light and cheap. For easy cleaning of the Ausiger and To enable the magnet surface and to make the guide elements accessible, the boom housing is expediently made in two parts, with an upper and a lower part.

Esslinger Bank 13498002 ■ PostscheeUI <oiito | äut ^ art 1357361 :::

HELLMUT MÜLLER '<·' · <·> TO 'Esslingen-Liftbersbronn

Dipi -Z) ng. Camererweg 39

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An exemplary embodiment of the invention is shown in FIG. 1 (longitudinal section) and FIG. 2 (cross section). Another exemplary embodiment is shown in FIG. 3 (cross section) and a variant thereof in FIG. K (partial cross section). The examples are described below: Fig. 1 and 21 A boom (i) rests with its underside (la) on the lower pair of rollers (3) · with its upper side (ib) on the upper pair of rollers (2) and on the sides on the Pairs of rollers (h) and is thereby guided in the direction of the arrow. The roller pairs (2), (3) and (4) are mounted on the boom housing (5). The boom housing (5) is fixedly or pivotably connected to a column, frame structure or the like (not shown). The boom (i) carries a tool carrier (not shown) and, in order to be sufficiently rigid, has a corresponding weight P, which rests on the lower roller pairs (3) and corresponds to the formula R = f *> · P J? influences the frictional force R, even if the coefficient of friction jatrt wi ani * r (^ - can be kept relatively low as a result of the rolling friction ) an aggregate (6) and / or (7) attached. The aggregate (6) is a magnet which is attached as an attracting magnet, ZB permanent magnet, at the top of the boom housing (5) »expediently vertically adjustable repelling magnet must be attached at the bottom of the boom housing (5). The unit (7) is attached to the underside of the boom housing (5) and uses compressed air to reduce the contact pressure P like an air cushion. and / or (7) the boom (i)

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Esslinger Bank 13498002 Postscheeltßofitojätut ^ art. 1312736! !! '.

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HELLMUT MÜLLER

Dipl.-3ng. Engineer office

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Camererweg 39

(Access: Stöckenbergweg 39)

Telephone 0711/373133

must be kept in suspension so that P and thus R would be approximately equal to 0, i.e. the force to move of the boom (i) becomes extremely low.

Another exemplary embodiment is shown in FIGS. 3 and h : the lower part of the boom housing (5a) is attached to at least 2 pairs of eccentric bolts (8) with 1 bearing body (9) each »movable in the axial direction of the eccentric bolt (8). The movement of the bearing body (9) is limited by springs (ii) with which each eccentric pin (8) is provided. The bearing bodies (9) each serve to accommodate a straight ball or roller guide (10), to which the boom (1) is assigned. The ball or roller guide (10) can absorb very large horizontally acting forces, but only small vertically acting forces and can therefore be carried out very easily and cheaply. Only a relative movement horizontally in the direction of the longitudinal axis of the arm (i) is possible between the bearing body (9) and the arm (1).

The boom housing upper part (5b) is detachably connected to the boom housing lower part (5a). The height-adjustable magnet (6) is attached to the upper part of the support housing (5b); its power is adjustable, at least in levels ^N. "weak" and "strong". At level "weak" the magnet (6) exerts such an attractive force on the boom (1) that its support P and thus the friction R in the ball - or roller guide (io) is reduced; the boom (1) still has a small distance s from the magnet (6) so that there is no contact Pressure of the springs (11) on the bearing body (9) is overcome and the boom (1) with the bearing body (9) in the axial direction of the eccentric bolt (8), expediently for

Esslinger Bank 13498002 ■ Postsdieel <l <(xito.Stutigart. 132756:

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HELLMUT MÜLLE R '"' '73 Csslincjtn-Lidljersbronn

Dipl.-Onq. Camererweg 39

(Access: Stöckenbergweg 39)

Engineer office _{Te | efon}

Prevention of fretting corrosion in a special guide (12), moved upwards until it comes into contact with Magnetic lamb he (6). The magnet (6) serves both as a support for absorbing the working pressure and for The boom (i) is clamped like a magnetic clamping plate. When the clamping is released, known means, not shown, such as counter magnet, Springs or firing pins. The backlash-free setting of the roller bearing (9) (1O) is achieved by Rotation of the eccentric bolt (8) causes the holes or approaches not shown for this purpose.

Flg.k shows a different type of fastening and adjustment of the bearing body (9) with ball or roller guides (1O). Here the bearing body (9) is firmly connected with a spring steel band (12). This steel band (12)

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is, horizontally in the direction of the arrow / by screws (15), connected to the boom housing lower part (5a); it holds the Lagerkörpsr (9) immovable in every horizontal direction and only allows a small vertical movement upwards, limited by bolts (16), which can be facilitated by a bead-shaped design (13) of the steel band (12). The steel band (12) with bearing body (9) allows a play-free adjustment of the ball or roller guide (1O) on the boom (1) by means of a screw (14).

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Claims (6)

• ■ · · • · β Hellmut Müller ί - · '· "".' '* "'. ''. EssiIngen - 6 claims 1. Boom, which is guided horizontally in a boom housing, characterized in that a unit in the boom housing (5) (6) (7) is installed, which strives to raise the boom (1) against its gravity and thereby reduce the contact pressure P to reduce its guide (3) (1O). 2. Boom according to claim 1, characterized in that the unit (6) consists of at least 1 magnet, which either attracts or repels arm (i), depending on the magnet at the top or the lower part of the boom housing (5) is installed. 3. Boom according to claim 1, characterized in that the unit (7) consists of nozzles that create a pressure difference through air flow in the upper and lower part of the boom housing (5), so that the boom (1) against its gravity being affected,- k. Boom according to claims 1 and 2, characterized in that the magnet (6) is attached to the boom housing (5) in such a way that a small air gap (s) is maintained between the boom (1) and magnet (6) so that when the magnet ( 6) the boom (1) rests directly on the magnet (6) or on a surface associated with the upper part of the boom housing (5). 5. Boom according to claim k, characterized in that the magnet (6) is attached to the upper side of the roller box (5), which receives the working pressure via the boom (i). 6. Boom according to claim 1 to 5, characterized in that the Boom housing (5) consists of 2 parts, upper part (5b) and lower part (5a).