SE524885C2 - Support arm, especially for caravans, has support foot lowered or raised using shaft passed through axle hole - Google Patents

Abstract

The support foot is lowered or raised using a shaft (1) which can be passed through an axle hole (1) which has a stop surface (2) for a shaft surface (2). A support part (3) of the shaft prevents the shaft from being pulled out again.

Description

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Ica 50 55 60 65 70 75 80 85 90 524 885 screw: the nut (104) is moved with a control (R) in the manner schematically illustrated in Fig. 2a. The strut (105) can thus be angled relative to the strut (106), without the need for the screw (103) to be rotated. When in this way the support foot (108) has been moved to a partially extended position - a position touching or close to the ground - the running nut is locked at the screw. The support foot can then be brought down the last bit to the ground and pressed down against the ground, by turning the screw with a crank attached to the end of the screw rod (107).

The support leg in US 4,146,250 can be quickly adjusted with a control (R), in accordance with the illustration in Fig. 2b.

Two other quickly adjustable support legs are described in US 5,901,980 and US 5,042 779. These support legs are of a different type than the support legs in figkgz. The screw is not fixed in a horizontal position but is part of one of the struts which folds out to the ground. When the outrigger is folded in US 5,901,980, it is necessary, as far as we understand, to bring one hand to the ground to loosen and lift one of the struts. Although this support leg is simpler in construction than those in Fig. 2, it is more difficult to handle because the leg is lifted by hand, and is not operated with a conveniently placed control (R). The support leg in US 5,042,779 is particularly simple in construction, but also particularly cumbersome to handle because the screw is completely loosened and stored in a separate place.

FIGURES - DESCRIPTION Fig 1 ... Area of application.

Fig 2 ... State of the art.

Fig. 3 ... First embodiment.

Fig 4 ... Second embodiment.

Fig 5 ... Other shapes.

Fig 6 ... Primary constituents.

Fig 7 ... Use and function.

FIGURES - DESIGNATIONS ON DETAILS .Last.

..Ground.

..Force.

.Regulations.

..Screw bracket.

P- * DUWCTJZ 95 100 105 110 120 130 135 u u o | ~ n p -n u .n o c v w v. ~ U. v ».u 1 q .u h. u. f ~. . .- n n n n n n ua .av nu v ø - n. n n. - 1 I ß u »n v- u. n ~. . n v o. a u u v. u nu 1 »- H» o »_3_ lO2 ... vise. l03 ... Screw (threads on screw rod). lO4 ... Running nut. 105 ... Stag. lO6 ... Stag. lO7 ... Web nut. 108 ... Fot. 109 ... Guide rail. lO2R ... Control. l ... Klack. l '... Holes for the screw shaft; shoulder hole. 2 ... Heel surface. 2 '... Edge (surface for the heel to stop against). 3 ... Support (shaft pin or shaft sleeve). 3 '... Axle seat (seat for the supports (3, 7)). 4 ... Release section. 4 '... Barrier (eg bulge). 5 ... Handle. 6 ... Heel surface. 7.Support (shaft pin or shaft sleeve). 8 ... Release section. ll '... Part of shoulder shaft. l2 '... Part of shoulder hole. l3 ... Ridge or other profile of the heel. l3 '... Part of shoulder shaft; widening or other suitable heel profile (13). l4 ... Stop sprint or other stopping agent.

A ... Shoulder or joint.

A '... Shoulder or joint.

DESCRIPTION OF THE INVENTION - WHAT ACHIEVED BY THE INVENTION In view of the prior art described above, the following is particularly achieved by the invention. In general, a simple manual support leg for the construction is achieved with a control for quickly switching the leg between a storage position and a partially extended position (or a plurality of partially extended positions). In particular, unlike the support legs in fi 2, no extra, or special, controls are needed; a single rod with screw threads works BOTH as a control to quickly adjust the support leg AND as a screw for the nut. In that the necessary modifications of the simple type in Fig. 1b are otherwise also small, the invention entails a simplification compared with the support legs illustrated in Fig. 2. Despite the simplification, notably the double function of the control, an at least equal comfortable adjustment of the outrigger between the storage position and the partially extended position. The quick-adjustable support legs US 5,901,980 and US 5,042,779 are characterized as being simple, but support legs according to the invention need not be more complicated, although the operation of the support foot between the storage position and the partially extended position can be made much more comfortable.

DESCRIPTION OF THE INVENTION - EMBODIMENT [A first embodiment] An embodiment of the invention is shown in Fig. 3. First of all, just as on known support legs, there is a screw rod (102) with threads (103). Unlike known support legs, there is a specially designed section (102R) that can be seen as a kind of modification of, or adapter on, the bar (102). In the present example, the section (102R) has been formed by turning or milling a bar blank at two sections, obtaining the structures (2, 3, 4) and (6, 7, 8) and the handle (5). The screw bracket (101) has a specially designed hole (1 '): in principle a large hole (l1') and a small hole (l2 ') are drilled so close to each other that they coincide and form tips (4').

The support leg is used as follows. The figure shows a position where the section (3) of the rod is located in the lower hole (l2 '). If the leg in this position is loaded with a weight on top of the parts (109, 101), then the angle between the struts (105) and (106) tends to widen; the screw nut (104) then pulls the rod so that the heel surface (2) is pressed tightly against the edge (2 '). In that condition the support leg is secured: the weight on it must be overcome, so it is practically impossible to pull out the bar so that the cut-off (4) ends up in the position required for the bar to be pulled up, past the points (4 '). ), to the big hole.

However, in the state when the support leg is unloaded, the rod (102, 102R) can be moved by hand from the small hole (l2 ') past the narrow passage (4') up to the large hole (ll '). When the rod has been brought up to the large hole (l1 '), the rod is free to move in the axial direction along the profile (109). The rod can be inserted until the section (6, 7, 8) is flush with the hole (ll '). In the above n coq: .en »nu nu» nu. oua oc; 185 190 195 200 205 210 215 220 225 524 335 - n n - -. . .. ..- .ns -ø _5._ position, the rod, due to the milled-down section (8), can be moved past the points (4 ') down to the small hole (12'). When the rod is then turned, by means of a crank attached to the crank nut (107), the rod is pressed out until the lug (6) receives the back of the screw bracket (101) - the support leg is then secured. The latter condition is illustrated in Fig. 6a. In reverse order compared to the one just described: to loosen the leg, screw the rod to the release position shown in Fig. 6b; the rod can then be moved (without turning) out and in to the positions shown in Figs. 6c, 6d; the bar is then rotated until the leg is loaded and supports the load, shown in Fig. 6e.

[A second embodiment] Another embodiment is shown in Fig. 4. A sleeve is threaded on a rod (102) and fastened by means of pins (14). In particular, the sleeve has two ridges (13) which end abruptly, forming the surfaces (2) and (6).

The screw bracket (101) has a hole (1 ') widened in two places (13') to be able to accommodate the ridges (13). The screw bracket also has four bulges (4 ') near the edge of the hole. h When the leg is in the position shown in the illustration, and the support leg is loaded with a weight from above, the heel surface (2) is pressed against the edge (2 ') of the screw bracket (101).

On the other hand, when the leg is unloaded, by gripping the handle (5) you can pull out the rod (102, l02R) a little bit, enough so that the sleeve can be turned past the knobs (4 '). Thereby the ridges (13) enter the middle of the grooves (13 '), and the rod (102, 102R) can be inserted in the axial direction through the hole on the screw bracket. When the leg has been folded up, the sleeve can now be turned again so that the heel surface (6) ends up behind the front plate on the screw bracket; the rod is then screwed so that the lug presses against the plate (corresponding to the surface (2 ') but on the back). The back of the front plate of the screw bracket preferably has knobs corresponding to (4 '),' or the like, to secure the leg in the raised position. The method just described is illustrated, as well as the first example was done, with the pictures in Fig. 6.

[Adapter] The control (102R) can be an adapter mounted on the bar (102). A sleeve, as in the second embodiment, is an example. Another example of an adapter is given in Figs. If the release section is given a shape as in the first example, the shaft (A ') is suitably laid parallel to the normal on the surface of the milled groove (4).

In this way the rod can be folded at the joint (A ') when the rod uno »a un; o asgo ao a oc: oc: oooo oc: en a »235 245 250 255 260 265 270 275 anu" nu .u ~ unn nu - u... - nn - aauu ~. -. -.. a ~ - a . u -. ~ -... na... n ... - - 4 n - n. ann ~. a. a. - n.,.. aa is moved up or down between the large and the small hole; and then the joint (A) in Fig. 3 would not be necessary.

Note, however, that only the joint on the running nut is sufficient for the rod to be able to be angled so that it can be passed between the large and the small hole. [ßelbart slider] In order to prevent the slider (102R) from protruding outside the caravan (or whatever object the support leg is on), it can be made foldable or detachable. Two examples of how this could be done are shown in Fig. 5b and Fig. Sc.

DESCRIPTION OF THE INVENTION - GENERAL DESCRIPTION The invention comprises a control (102R) attached to the screw rod (102). The control (102R) is a modification of the screw rod (102) or an adapter that encloses or replaces part of it. Expressed in a further way, and as shown in Figs., The control takes the place of the threads on a section of the screw of the support leg in Fig. 1. Examples of such controls have been given in Figs. 3, 4, 5.

Three other examples are shown in Fig. 7. These support the general description of the invention - the components shown have been given stylistic forms to clarify the function of the parts; otherwise the specific forms are insignificant. The control (102R) has - regardless of embodiment - a lug (1), a heel surface (2), a support (3), and a release section (4). These four components serve to make the screw rod (102) switchable between an axially locked condition and an axially movable condition, relative to the screw bracket (101).

The control (102R) can be rotatable relative to the screw rod as in Figs. 7b, 7c. But it can also be fixed, rotatable relative to the screw rod, as in Fig. 7a. The control may also have moving parts as in Fig. 13, but it may also lack moving parts as in the other examples.

Characteristic of the lug (1) is that it can be set to move freely axially through the shaft hole (1 '); in other words, it can be set so that it can be passed through the shaft hole.

On the other hand, whether it is cylindrical as in Fig. 7a or has a fin like Fig. 1p or several fins or is rectangular or has another reasonable shape is not significant. A 280 285 290 300 305 310 315 moving part which in Fig. 7c or more moving parts does not seem to constitute a limitation either. The heel surface (2) is the surface of the heel which, when the heel is set in this way, stops against the edge (2 ') of the screw bracket next to the shaft hole. The heel surface (2) is characterized by facing the screw; otherwise, the design of the heel surface (2) is not critical to the operation of the invention.

The support (3) is characterized in that it keeps the screw stably centered in the screw bracket (101). In the first example, in Fig. 5a, the support forms a shaft pin and the shaft seat (3 ') forms a bearing. In the other two examples, the support forms a shoulder sleeve and the shoulder seat holds the sleeve in place. The shape of the support (3) is therefore freer in the latter example compared to the first example.

The arrangement (4, 4 ') is characterized in that when the rod has been pulled out a bit, until the section (4) has come into position, the control can be moved past the barrier (4'). The section (4) has ended up in the position for releasing the control, when it is flush with the shaft hole; or, in other words, when it has taken the place of the aid. All shapes of the release section (4) and the barrier (4 ') which achieve that function are included in the invention. Different examples have been given in the different figures.

A control can have more than one such arrangement (1, 2, 3, 4). The support leg then receives a number of partially extended positions - extended positions from which the power screw can be used. Examples of applications are support legs for vehicles parked in uneven terrain or support legs suitable for different clearances on caravans.

To give the support leg the function of a secured raised position, the control can be provided with an arrangement (1, 6, 7, 8). The heel surface (6), the support (7), and the release section (8) can be designed in the same way as described above for the section (2, 3, 4). The only necessary difference is that the heel surface (6) is characterized by the fact that it faces from the screw (not towards the screw).

Claims (3)

f n u: nu a u .u n u n n va .. u nu u u u a n a u n »n n. w u - u n n o n - - n. I. u o n u n. .o ~ u n - .a-q 4 n - n a - I u v u .o ~ 1 _ - »n n - o n ~ n n. ~ - 0-0 nu .- PATENTKRAV A support leg of the screw jack type including a screw having support points in a screw bracket (101) and in a running nut (104), in particular comprising a control for quick adjustment of the support leg between a recessed position and at least a partially extended position, characterized by, that the control is a longitudinally narrow member which forms a continuation, along the screw shaft, of the screw; and that the control comprises a lug (1), the lug surface (2) facing the screw, adjacent to a support (3) adjacent to a release section (4): and that the shaft hole (1 ') of the screw bracket is shaped so that the lug can be obtained to pass through, or, can be made to stop against the screw bracket at the edge (2 ') of the shaft hole ~ in the stopped position the support rests against the shaft seat (3') formed by the edges of the shaft hole - and that the change from the stopped state of the lug to its axially movable condition comprises an axial movement of the control, the release section taking the place of the support in the shaft seat, in which position the control can pass unhindered past a barrier (4 ') on the screw bracket; resulting in a support leg that is quickly adjustable between a recessed position and a partially extended position. Support legs according to the preceding claim, characterized in that the lug (1) has a second lug surface (6) which faces from the screw and which adjoins a second support (7) which adjoins a second release section (8); and that the screw bracket, at the edge of its shaft hole, constitutes a stop for the second heel surface and the second support then rests against the shaft seat; and that the change from the stopped state of the lug to its axially movable state comprises an axial movement of the control, the second release section (8) taking the place of the support in the shaft seat, in which position the control can pass unhindered past the barrier on the screw bracket; resulting in a support leg that is quickly adjustable between a retracted position and a secured retracted position. Support legs according to one of the preceding claims, characterized in that the release section comprises a thinning of the slider in relation to the thickness of the slider at the adjacent support, and that the barrier consists of capes delimiting the shaft hole in a large hole and a small hole. I u uno ca en o nu ou øn-n nunavuunnn - na sa n. ~ ~~ u ø ununu - a - un I ~ v I nu an: unu u- .. nnacvwaoa I un nu unn ø 1 auu - nvuuu ' uno o. nu ..- ~ -. n. _9._. . Support legs according to one of the preceding claims, characterized in that the control is rotatable about the screw shaft in relation to the screw. . Support legs according to claim 4, characterized in that the slider has a cross-sectional profile which is suitable for insertion through the shaft hole when the slider is turned to suitable positions, but stops against the screw bracket when it is turned in other positions, relative to the screw. . Support legs according to one of Claims 4, or 5, characterized in that the lug comprises radially resilient parts which stop against the screw bracket, but which can be compressed - by gripping around the control - so that the lug can pass in through the shaft hole. . Support legs according to one of the preceding claims, characterized in that the slider can be removed or folded away, so as not to protrude beyond the object supported by the support leg, for example. Support legs according to one of the preceding claims, characterized in that the control has more than one partially extended position, in order to facilitate, for example, folding out where the ground surface is uneven.