WO2015149752A1

WO2015149752A1 - Height adjusting unit for a support arm system, and corresponding support arm system

Info

Publication number: WO2015149752A1
Application number: PCT/DE2015/100128
Authority: WO
Inventors: Markus Neuhof; Sascha WIRBELAUER
Original assignee: Rittal Gmbh & Co. Kg
Priority date: 2014-04-03
Filing date: 2015-03-25
Publication date: 2015-10-08
Also published as: DE102014104743A1; DE102014104743B4

Abstract

The invention relates to a height adjusting unit for a support arm system, comprising a height-adjustable support arm (1) which has a circumferentially closed hollow profiled section (2) and a rotary bearing (3) at each opposing end. The rotary bearings (3) can be adjusted in the same direction on vertical rotational planes via an adjusting element (4) which extends through the hollow profiled section (2), and the rotary bearings (3) are eccentrically connected via a parallel guide rod (5) which extends parallel to the rotational planes. The adjusting element (4) has a threaded drive (6) with a threaded rod (7) and a threaded sleeve (8) which is screwed onto the threaded rod. Either the threaded rod (7) or the threaded sleeve (8) is connected to one of the rotary bearings (3) in an eccentric manner and at a distance from the parallel guide rod (5), and the respective other component, i.e. the threaded rod (7) or the threaded sleeve (8), is mounted in a fixed manner in the longitudinal direction of the component and in a rotatable manner about the longitudinal axis of the component.

Description

Height adjustment unit for a support arm system and a corresponding support arm system

The invention relates to a height adjustment unit for a support arm system and a corresponding support arm system. Such height adjustment units serve, for example, for adjusting the height of a control housing of a human-machine interface, for example a monitor.

From DE 41 11 408 A1 discloses a support arm for a computer case or the like is known, which is adjustable via a gas spring in the vertical plane. The gas spring acts in a force triangle, which is adjustable to a required load range.

DE 40 14 009 A1 describes a support arm equipment carrier for monitoring monitors, control panels or the like. This equipment rack is used for height adjustment and viewing angle adjustment of operating housings and the like. The viewing angle adjustment is realized via a swiveling head carrier. The vertical adjustability is achieved by means of two gas springs, which are arranged between two mutually displaceable in the longitudinal direction U-Profüen.

From DE 20 316 090 U1 a Tragarmsystem for receiving Handschraubera is known in which a linkage, which is arranged as a parallelogram, a vertical adjustment of the screwdriver is possible. The force for raising or lowering the screwdriver is optionally provided via a hydraulic cylinder or a pneumatic cylinder. This sits between the parallelogram bars and is controlled by a control unit. A similar parallelogram mechanism is also known from AU 2006 201 355 B2. DE 197 16 761 C2 describes a further height-adjustable support arm of similar design. Similar support devices also describe DE 10 2006 014 217 B3 and DE 10 2006 052 804 B4.

The support arm systems known from the prior art have the disadvantage that they do not achieve the degree of protection IP54 required for many industrial applications, which is due in particular to their open design due to the moving parts of the height adjustment unit. Another disadvantage is that the known systems usually have only a very limited cross section for cable management within the system. It is therefore the task of the To provide a height adjustment for a support arm system, which allows the production of support arm systems that reach the IP54 protection class. The system to be proposed should also provide for easy cable management with low mechanical stress on the cables.

This object is achieved by the height adjustment unit according to the invention with the features of claim 1. The dependent claims 2 to 10 each relate to advantageous embodiments of the invention.

The height adjustment unit according to the invention has a height-adjustable support arm, which has a circumferentially closed hollow profile and at opposite ends in each case a rotary bearing. The hollow profile is preferably formed in one piece. The pivot bearings are vertically adjustable over a vertically extending by the hollow profile adjustment member in vertical planes of rotation. The adjusting member has a parallel to the planes of rotation extending parallel guide rod, which connects the pivot bearings eccentric to their axes of rotation. The adjusting member further comprises a screw drive with a threaded rod and a threaded sleeve screwed thereon. Either the threaded rod or the threaded sleeve is connected to one of the pivot bearing eccentrically and spaced from the parallel guide rod. The respective other component of threaded rod and threaded sleeve is adjustable in its longitudinal direction and rotatably mounted about its longitudinal axis. This component, which can be displaced in its longitudinal direction and is rotatable about its longitudinal axis, can be coupled with a rotary drive for actuating the adjustment member for adjusting the height of the support arm, for instance via a shaft.

Compared with the systems known from the prior art, the system according to the invention has the advantage that it has a wide payload range and does not require exact adjustment to an actual trailer load. As a result, with the system according to the invention, it is no longer necessary to provide an embodiment for a plurality of load areas, which on the one hand reduces the production outlay and, on the other hand, increases operating convenience. Since the system according to the invention is designed to be self-locking, it can be easily adjusted by appropriate adaptation of the lengths of parallel guide rod, screw and hollow profile to a desired stroke range, without thereby a Adaptation of the design of the aforementioned components would be required, which goes beyond the length adjustment.

The Höhenversteiiemheit invention thus enables embodiments in which the entire adjustment member is received in the interior of the support arm. In some embodiments, it is only necessary that a shaft for driving the screw drive protrudes from the support arm. However, many rotary unions are known from the prior art, which allow the removal of the shaft while maintaining the required IΡ- protection class. From DE 10 2008 057 816 B3 a rotary bearing is also known which achieves the required IP protection class.

In order to keep the torque low, which must be provided on the screw drive, to move the support arm under the load of a control housing attached to the support arm system, it is provided in one embodiment of the invention that the adjustment member further comprises a spring element attached via one of its two mutually adjustable ends to one of the pivot bearing and is mounted non-adjustable over the other end along its longitudinal direction. The spring element may for example be a gas spring or a gas tension spring. The screw drive is thus essentially load-free and can be designed with low self-locking.

In order to further facilitate the mounting of the height adjustment unit in the support arm system, it is provided in one embodiment of the invention that the adjustment member further comprises a one-piece articulated lever which is rigidly attached to one of the pivot bearing, the articulated lever a first bearing support for the parallel guide rod, a second bearing receptacle for the threaded rod or the threaded sleeve and a third bearing receptacle for the spring element.

In a particular embodiment of the invention, the spring element to a tensile and / or compression stage, which is selected in an attacking on the Tragarmsystem load so that no more than a certain maximum torque must be spent by the screw drive for a lifting movement of the support arm. In one variant, the spring element has an adjustable tensile and / or pressure stage. The use of a Screw drive in conjunction with a spring element that is tuned so that at a given load only a minimum torque must be used, has the advantage that the Höhenverstellemheit due to the friction losses in the overall system (for example in the pivot bearings.) Is self-locking at all expected loads and thus allowing a very comfortable maneuvering of different loads with the same support arm system.

In a further embodiment of the invention, the non-adjustable in its longitudinal direction component of threaded rod and threaded sleeve via a coupling element and a joint inclination adapter with a motor or manually and preferably via a crank driven shaft.

In this case, the coupling element and the joint inclination adapter can be accommodated in a housing, which is at least a cylindrical bolt which extends from an outer wall of the housing and is received in a rigidly connected to the Tragann rotational receptacle, is rotatably mounted about a horizontal axis of rotation ,

In yet another embodiment of the invention, the circumferentially closed hollow profile passes at its opposite ends in each case via a 90 ° elbow in the pivot bearing, wherein at least one of the angle pieces at its outer radius has a removable and sealingly mounted cover with an opening through which extends a motor or manually driven while driving for the operation of the screw through.

In yet another embodiment of the invention, the non-deformable in its longitudinal direction component of threaded rod and threaded sleeve via a bevel gear or a Hypoidantrieb is rotationally driven.

In one embodiment of the invention, the threaded rod and the threaded sleeve on a thread, which has a certain self-locking, preferably a trapezoidal thread. To facilitate the assembly of the height adjustment unit according to the invention in one

Support arm system is provided in an embodiment of the invention that the parallel guide rod has a push rod and a releasably and torsionally connected thereto receiving piece, wherein the parallel guide rod is rotatably mounted on the receiving piece to a first of the rotary bearing, and wherein the parallel guide rod via a receiving piece opposite end of the push rod is rotatably mounted on the above-described articulated lever to a second of the rotary bearing. The parallel guide rod has for attachment to the pivot bearings preferably attachment points whose distance corresponds to the rotational axis distance of the pivot bearing.

According to another aspect, the invention further relates to a support arm system using a height adjustment unit of the type described above, wherein the Höhenverstelleinheit is connected via a first of its pivot bearing with a first body and a second of its pivot bearing on a second body, and wherein the vertical planes of rotation of the Pivot bearing parallel spaced from a vertical pivot plane in which the support arm is height adjustable, are arranged. The Tragarmsystem is thus characterized by the fact that the planes of rotation of the pivot bearing and the pivot plane of the support arm, unlike the known from the prior Teclmik systems do not coincide, but paraliei offset from one another. It is thereby achieved that the assembly of the height adjustment, for example using mounting brackets and the like, which engage the pivot bearings, can be done largely arbitrary.

Since the height adjustment unit according to the invention is characterized by its universal applicability, the two bodies that connect the height adjustment unit are not limited to any specific embodiments. In one embodiment, the first body may be a rigid or movable mounting pillar of the support arm system mounted on a stud or building, such as a building wall, a building ceiling, or on a building floor, such as horizontal, vertical, or angled. The second body may be an electronic device, such as a man-machine interface, with a device housing to which the second pivot bearing is mounted.

In one embodiment, at least one of the rotary bearings is connected to the body associated with it via a 90 ° elbow rotatable about the axis of rotation of the rotary bearing. In front- Preferably, both pivot bearings are connected via a about the axis of rotation of the rotary bearing rotatable 90 ° - elbow with its associated body. Furthermore, the at least one rotary bearing can be connected to the support arm of the height adjustment unit by means of a further 90 ° angle piece rotatable about the axis of rotation of the rotary bearing, so that the two 90 ° angle pieces are connected to one another rotatably via the rotary bearing.

Further details of the invention will be explained with reference to the following figures. Showing:

1 shows a support arm system having a height adjustment unit according to a Ausführangss- form of the invention;

FIG. 2 shows the height adjustment unit according to FIG. 1 with transparent hollow profile and covers shown transparently;

FIG. 3 shows a detailed view of the screw drive according to FIG. 2;

Figure 4 is a detail view of the parallel guide rod according to Figure 2;

FIG. 5 shows a detailed view of the support arm according to FIG. 2 in the region of the upper pivot bearing;

Figure 6 is a detail view of the articulated lever according to Figure 2;

FIG. 7 shows a detailed view of the support arm according to FIG. 2 in FIG. Area of lower pivot bearing; and

FIG. 8 shows a cross-sectional view and a perspective view of the hollow profile according to FIG. 2. Figure 1 shows a section of a generic Tragarmsystem. The vertical profile in the upper left in the illustration according to FIG. 1 can be mounted, for example, under a building ceiling. At the opposite end at the bottom right in the illustration of Figure 1, for example, a control housing for a man-machine interface can be mounted. The invention relates to the marked with the reference numeral 1 support arm between the two pivot bearings 3, The pivot bearing are designed to ensure the required IP protection class in the manner and manner, as is known from DE 10 2008 057 816 B3.

FIG. 1 clearly shows that, with the exception of the shaft 17 and the crank 16, all moving parts of the height adjustment unit are accommodated in the interior of the support arm 1, which contributes significantly to achieving the ΪΡ protection class. The rotary feedthrough of the shaft 17 through the cover 23 of the angle piece 2.2 may be formed by means of elastic sealing elements.

FIG. 2 shows a view into the interior of the support arm 1. It can be seen that the essential components of the adjusting member 4 are arranged completely in an upper region of the hollow profile 2, so that in the lower region of the hollow profile 2 sufficient space for the cable gland remains. The adjustment member 4 extends between the two pivot bearings 3 through the hollow section 2 therethrough. It has a parallel guide rod 5 which is eccentrically connected to the two pivot bearings 3. At the right in the representation pivot bearing 3, the parallel guide rod 5 is connected via a lever Gelerikhebel 10 with the pivot bearing. More specifically, the parallel guide rod 5 is eccentrically attached to the support arm 1 side facing a bearing part of the pivot bearing 3. For further details on the technical design of the pivot bearing 3, reference is made to DE 10 2008 057 816 B3.

The adjusting member 4 further comprises a screw 6 with a threaded rod 7 and a threaded sleeve 8 screwed thereon, wherein the threaded rod 7 is connected via the articulated lever 10 eccentrically and spaced from the parallel guide rod 5 with the right in the representation Drehiager 3. The threaded sleeve 8 is fixed in its longitudinal direction is fixed and mounted rotatably about its longitudinal axis. For this purpose, the threaded sleeve 8 is connected via a coupling (see FIG. 3) to a housing 18, which engages via bolts in rotary receptacles 21 and thus the immutability of the threaded sleeve 8 in the longitudinal direction. direction. On the other hand, the pivotability of the housing 18 about the horizontal axis of rotation of the bolts in the rotary mount 21 allows a relative angular displacement of the screw 6 to the hollow section. 2

The figure 2 can further recognize that the embodiment shown of the adjusting member 4 has a compact design, which allows below the Verstellgüeds 4 and within the hollow section 2 still sufficient space remains as a cable chamber. Because the cables routed through the hollow profile 2 can be guided to the rotary bearings 3 through the axis of rotation of the rotary bearings 3 or only slightly eccentrically thereto, they are only exposed to a low mechanical load.

The height adjustment unit shown is suitable for use in support arm systems where the height adjustment unit is mounted above a vertical mounting column for ceiling or floor mounting, or a horizontal wall-mounting assembly column. FIG. 1 shows an embodiment of a support arm system in which the height adjustment unit is fastened by means of a mounting pillar which comes vertically from above. The height adjustment unit can also be used in complex, multi-arm support arm systems. The height adjustment unit is furthermore suitable for directly on a machine, a control housing, a. Monitor or other human-machine interface to be mounted. This assembly can be done so well hanging as well as sessile.

The adjusting member 4 forms a compact unit which is fastened via simple screw connections to the rotary bearings or the hollow profile. This makes it possible that the V member can be easily replaced if necessary, for example, to convert to an embodiment with a larger adjustment range with reduced trailer load.

3 shows a detailed view of the screw 6. The screw 6 consists essentially of a threaded rod 7 and a threaded sleeve 8 screwed thereon. The threaded sleeve 8 is connected via a coupling element 14 with a joint inclination adapter 15. This serves for the angle compensation of the adjusting member 4 with respect to the crank 16. The coupling element 14 and the joint inclination adapter 15 are accommodated in a housing 18. This has on opposite outer sides 20 each one of this upwardly extending bolt 19. The bolts 19 ensure the Verschwenkbar- ability of the screw 6 to compensate for the lever arm adjustment due to the toggle lever 10th

4 shows a parallel guide rod 5, which has a receiving piece 25 and a push rod 24 received therein. The push rod 24 is formed substantially as a rectangular profile and screwed against rotation in a rectangular receptacle of the receiving piece 25. The receiving piece 25 and the receiving piece 25 opposite end of the push rod 24 have a passage bore for fixing the Paral lelführungsstange to the pivot bearings 3 (see Figure 2). The hole spacing of the passage bore just corresponds to the distance between the axes of rotation of the rotary bearing 3.

FIG. 5 is a detailed view of the support arm according to FIG. 2 in the region of the left-hand angle piece 22 in FIG. 2. Here it can be seen that the housing 18 is inserted via its bolts 19 into rotary receptacles 21, as a result of which the pivotability already described with reference to FIG the housing 38 is ensured about a horizontal axis of rotation. Furthermore, it can be seen that the left pivot bearing 3 facing the end of the gas spring 9 in the region of the left angle piece 22 is rigidly connected to the support arm 1. x denotes the axis of rotation of the pivot bearing 3. In the joint inclination adapter 15 a while 17 is used, which is guided by the transparent cover 23 from the interior of the support arm 1 to the outside to be driven there, for example, via a crank or motor ,

In Figure 6, the joint piece 10 is shown in the embodiment according to the preceding figures. It is preferably designed as a one-piece component, for example as a die-cast component. It has, in addition mounting holes for the assembly of the hinge lever 10 to the pivot bearing 3 (see Figure 7) bearing receivers 1 1, 12, 13. The first bearing receptacle 1 1 serves for the rotatably mounted attachment of the parallel guide rod 5 (see FIG. 4). The second Lageraufhahrne 12 serves for rotatably mounted mounting of the threaded rod 7. The third Lageraufhahrne 13 serves for rotatably mounted mounting of the spring element 9, here a gas spring. FIG. 7 is a detailed view of the support arm 1 according to FIG. 2 in the area of the swivel joint 3 shown on the right in FIG. 2. The cover 23 is reproduced transparently for better illustration. It can be seen that the articulated lever 10 is screwed to the rotary bearing 3, for which purpose the rotary bearing 3 on a circular path around its axis of rotation has a system perforation of oblong holes and bores. The threaded rod 7, the Gaszugfeder 9 and the parallel guide rod 5 are connected via the bearing receivers 11, 12, 13 (see Figure 6) rotatably connected to the articulated lever 10.

8 shows a cross-sectional view and a perspective view of the Hohiprofils 2. The Höhenverstellemheit invention just allows the use of circumferentially closed, one-piece hollow profiles with high mechanical torsional stiffness, which can be easily prepared, for example, by the extrusion process. The profile 2 has no mutually movable profile halves, as is known for example from the prior art. and which problems in obtaining the required IP Sehutzklasse bring with it. In addition, in the present invention, the closed, one-piece hollow profile just for receiving compressive forces, while the adjustment member forms the tension system for receiving the tensile forces.

The features of the invention disclosed in the foregoing description, in the drawing and in the claims may be essential for the realization of the invention both individually and in any desired combination.

LIST OF REFERENCE NUMBERS

1 support arm 19 bolts

2 hollow profile 20 outer wall

3 pivot bearing 21 pivotal mounting

4 adjusting 22 angle piece

5 parallel guide rod 23 cover

6 screw drive 24 push rod

7 threaded rod 25 receiving piece

8 threaded sleeve x axis of rotation of the rotary bearing 9 spring element y axis of rotation of the housing 10 articulated lever

11 first bearing seat

12 second bearing seat

13 third bearing intake

15 joint inclination adapter

16 crank

17 wave

18 housing

Claims

claims

1. Höhenverstelleinheit for a Tragarmsystem, with a height-adjustable Tragann (1) having a circumferentially closed hollow profile (2) and at opposite ends in each case a rotary bearing (3), wherein the pivot bearing (3) via a through the hollow profile ( 2) ersteckendes adjustment member (4) are vertically adjustable in vertical planes of rotation, wherein the pivot bearing (3) via a parallel to the planes of rotation extending parallel guide rail (5) are eccentrically connected, wherein the adjusting member (4) has a screw drive (6) a threaded rod (7) and a threaded sleeve (8) screwed thereon, wherein either the threaded rod (7) or the threaded sleeve (8) with one of the rotary bearing (3) eccentrically and spaced from the parallel guide rod (5) is connected, and wherein the each other component of threaded rod (7) and threaded sleeve (8) is mounted in its longitudinal direction and unrotatable about its longitudinal axis rotatable.

2. Höhenverstelleinheit for a Tragarmsystem according to claim 1, wherein the adjusting member further comprises a spring element (9) which is attached via one of its two mutually adjustable ends on one of the rotary bearing (3) and mounted on the other end along its longitudinal direction is non-adjustable,

3. Höhenverstelleinheit for a support arm according to claim 2, wherein the Versteil- member further comprises a one-piece component formed as articulated lever (10), the. one of the pivot bearing (3) is rigidly fixed, wherein the articulated lever (10) has a first bearing receptacle (11) for the parallel guide rod (5), a second bearing receptacle (12) for the threaded rod (7) or the threaded sleeve (8) and a third Bearing Aufnne (13) for the spring element (9).

4. Height adjustment unit for a support arm system according to claim 2 or 3, wherein the spring element (8) has a tensile and / or compression stage, the one at the

Tragarmsystem attacking load is selected so that for a lifting movement of the support arm (1) no more than a certain maximum torque through the screw drive (6) must be spent.

5. Höhenverstelleinlieit for a Tragarmsystem according to any one of the preceding claims, wherein the un in its longitudinal direction un adjustable component of threaded length (7) and threaded sleeve (8) via a coupling element and a joint inclination adapter (15) with a motor or manually and preferably via a crank (16) drivable shaft (17) is connected.

6. Höhenverstelleinlieit for a support arm system according to claim 5, wherein the coupling element and the hinge inclination adapter (15) are accommodated in a housing (18), which via at least one cylindrical pin (19) extending from an outer wall (20). of the housing (18) and in a with the support arm (1) rigidly connected to the rotary receptacle (21) is received, about a horizontal axis of rotation (y) is rotatably mounted.

7. Höhenverstelleinlieit for a Tragarmsystem according to claim 5 or 6, wherein the circumferentially closed hollow profile (2) via a respective 90 ° - elbow (22) merges into the pivot bearing (3), wherein one of the angle pieces (22) at its outer radius a removable and sealingly mounted cover (23) having an opening through which the shaft (17) extends therethrough.

8. Höhenverstelleinlieit for a support arm according to one of the preceding claims, in which the non-adjustable in its longitudinal direction component of the threaded rod (7) and threaded sleeve (8) via a bevel gear or a Hypoidan- drive is rotationally driven.

9. Höhenverstelleinlieit for a Tragarmsystem according to any one of the preceding claims, wherein the threaded rod (7) and the threaded sleeve (8) have a thread which has a certain self-locking, preferably a trapezoidal thread.

10. Höhenverstelleinlieit for a Tragarmsystem according to any one of the preceding claims, wherein the parallel guide rod (5) has a push rod (24) and a releasably and non-rotatably connected Aufhahmestück (25), wherein the Parallel guide rod (5) via the receiving piece (25) rotatably mounted on a first of the rotary bearing (3), and wherein the parallel guide rod (5) via a receiving piece (25) opposite the end of the push rod on the Gelenkhe- bel (10) according to Claim 3 is rotatably mounted on a second of the rotary bearing (3).

1 1. Support arm system having a height adjustment unit according to one of the preceding claims, wherein the height adjustment unit is connected via a first of its pivot bearing (3) with a first body and a second of its pivot bearing (3) with a second body, wherein the vertical planes of rotation the pivot bearing (3) spaced parallel to a vertical pivot plane, in which the support arm is height-adjustable, are arranged.

12. Support arm system according to claim 1 1, wherein the first body is a rigid or movable mounting pillar of the Tragarmsystems on a stud or building, such as a building wall, a building ceiling, or on a building floor, such as horizontal, vertical, or angled, is mounted.

13. Support arm system according to claim 11 or 12, in which the second body is an electronic device, such as a man-machine interface, with a device housing to which the second pivot bearing (3) is mounted.

14. Support arm system according to one of claims 1 1 to 13, wherein at least one of the pivot bearing (3) via a about the axis of rotation of the pivot bearing (3) rotatable 90 ° - elbow is connected to the associated body.

15. Support arm system according to claim 14, wherein the at least one pivot bearing (3) via another about the axis of rotation of the pivot bearing (3) rotatable 90 ° - elbow is connected to the support arm (1) of the height adjustment, so that the two 90 ° - contra angles via the rotary bearing (3) are rotatably connected to each other.