DE102021204948A1 - BEARING DEVICE AND SUPPORT ARM OF A MOTOR VEHICLE LIFTING DEVICE - Google Patents

Abstract

Bearing device 1, 10 for a support arm 100 of a motor vehicle lifting device with a bearing axis 50 for contacting a section of the support arm 100 of the motor vehicle lifting device, a connecting device 60 which is set up to connect the bearing axis 50 to a section of the support arm of the motor vehicle lifting device connect, and a spring element 70 which is adapted to store the bearing axis 50 movably.

Description

The present disclosure relates to a bearing device for a support arm (alternatively also referred to as a swivel arm) of a lifting platform (alternatively also referred to as a lifting device). Furthermore, the present disclosure also relates to a support arm which has such a bearing device. The lifting device is intended in particular for raising or lowering motor vehicles, it being possible for other lifting devices to be equipped with the bearing device or a support arm which has such a bearing device. It is technically advantageous that the bearing device makes it possible, among other things, to simplify the operability of the support arm with the bearing device, as will be explained in detail below.

Known swivel arms are designed to be telescopic and include several support arm or swivel arm extensions. The pull-out elements of a support arm are usually hollow and plugged into one another in such a way that the telescopic function can be implemented. Known Tragarmauszüge, such as those of the DE 202006007156 U1 described, and particularly those intended for higher load or tonnage lifts, however, require quite a high operating force for accurate positioning under the vehicle. This is due, among other things, to the fact that the weight of the support arm extensions is already quite high. Furthermore, the lifting points of the vehicles to be lifted are regularly difficult to access and far below the body.

Against this background, a solution is to be offered with which the required operating force of a support arm is reduced or the operating comfort for the user is increased, with operating safety not being impaired. This is solved by the appended claims, the dependent claims describing preferred embodiments.

One aspect of the present disclosure relates to a bearing device for a support arm of a motor vehicle lifting device (alternatively also referred to as a lifting device, lifting platform or the like). The support arm (alternatively: swivel arm) is telescopic and can preferably be provided to raise a motor vehicle, as is usual, for example, with pillar lifting platforms. The aforesaid bearing device comprises a bearing axle for contacting a portion of the support arm of the motor vehicle lifting device, i. H. preferred that the bearing axis can be adapted to be in contact with a portion of the support arm of the motor vehicle lifting device. Here it is noteworthy that the contacting or being in contact should be understood not only as a direct contact between the bearing axis and the portion of the support arm, but also an indirect contact between the bearing axis and the portion of the support arm from the present disclosure should be included. Furthermore, the contacting of the bearing axis can also be designed in such a way that the bearing axis supports or absorbs at least a partial force or part of the weight of the support arm and a possible loading of the support arm via direct or indirect contact with a section of the support arm. In other words, at least part of the weight of the support arm (or one or more pull-out elements of the support arm) can be derived as forces and/or moments primarily acting radially on the bearing axis by means of the bearing axis and the other components of the bearing device.

Furthermore, the bearing device can comprise a connecting device which can be set up to connect the bearing axle or the bearing device to a section of the support arm of the motor vehicle lifting platform. The connection is preferably designed to be detachable. Mechanically detachable or detachable should in particular include the options that non-destructive disassembly is possible, as z. B. is executable via a screw connection or other similar options. Furthermore, the bearing device can comprise a spring element which can be set up to support the bearing axis in an elastically movable manner. The movable mounting of the bearing axis can in particular be understood in such a way that the bearing axis can move relative to another component of the bearing device, e.g. B. to the connecting device, or with regard to the support arm itself. Elastic movability should include, in particular, that the bearing axis can be moved out of a reference position or a basic position and can return to it independently if, for example, a load or a load has been removed that leads to a (relative) movement of the spring element or .

The storage device makes it possible to design a telescoping support arm in such a way that the telescoping subsections (support arm extensions or extensions) can be easily moved relative to one another. In particular, the bearing axis can be in contact with a section of the support arm or a section of an extension of the support arm and easily roll and/or slide off this when the telescopic function of the support arm is used to lengthen or shorten the support arm. Because of the presence of the spring element, which occurs when the support arm is loaded, for example when a motor vehicle is lifted, in addition to the weight of the support arm itself, can preferably also be used to block the telescopic function of the support arm. This can be achieved, for example, by adjusting the spring force, in that the bearing axis performs a relative movement, for example when the support arm is loaded, due to the spring element, which leads to a large-area contact between the extension elements or extensions of the support arm and this contact enables a displacement or telescoping of the Pull-outs impeded or blocked. The lock can be achieved, among other things, due to the contact pressure of the extensions against each other and the frictional forces between the friction surfaces. In summary, the bearing device thus enables the provision of a support arm for a motor vehicle lifting device that can be operated more easily, in particular with regard to its telescopic function, since the operating force of the support arm is reduced and the ease of use for the user is thereby increased. The certainty that the telescopic function is not triggered unintentionally while the support arm is under load can also be ensured.

Furthermore, the bearing device can also have an adjusting element. This adjusting element can be set up in such a way that when the adjusting element is moved or actuated, a reference position, which is preferably defined for the unloaded state of the support arm, ie a state in which the support arm only bears its own weight, can be changed. The reference position can be provided or defined, for example, between the bearing axis and the connecting device. Furthermore, it is preferred that the bearing axis can have a threaded hole in which the adjusting element can be arranged, in which case the adjusting element can be a screw or a threaded pin or the like. The actuation or movement of the adjustment element to change the reference position can then include, for example, turning the adjustment element in or out of or into the threaded bore of the bearing axle. Particularly preferably, by actuating the adjusting element, a distance between a part of the connecting device and the bearing axis can be increased or decreased, for example, so that the reference position can be set via this. It is technically advantageous that the adjustment element enables fine adjustment of the reference position of the bearing axis, which is advantageous with regard to ensuring a smooth telescopic function, since, for example, the reference position of the bearing axis can be set in the assembled state of the extensions of the support arm in such a way that the extensions of the Support arm in the unloaded state of the support arm have no (large-area) contact with each other and preferably only in the area of the bearing axis there is contact. In interaction with the spring element or its spring force and pretension, it can then also be adjusted so that the contact between the extensions is established when the support arm is loaded, in that the spring element yields correspondingly and thus deflects the bearing axis far enough from the reference position that the distance between the Excerpts to each other in the reference position of the bearing axis is overcome. Thus, both a very finely adjustable blocking function and a fine adjustment of the telescopic function are made possible for smooth executability in the unloaded state of the support arm. The adjusting element or the adjusting elements thus make it easier, in particular, to ensure that the telescope function runs smoothly in the unloaded state at any time and also subsequently after a certain period of operation, in that the distances between the extensions in the unloaded state can be set or readjusted with little effort using the adjusting element .

Furthermore, with regard to the aspect described above, it is preferred that the bearing axis has a cylindrical basic shape. The basic cylindrical shape can also be understood in such a way that several sections with different diameters can be provided in order to provide different functional areas along the longitudinal axis of the bearing axis. One or two ring-shaped rolling elements are particularly preferably provided on at least one or even more preferably on two sections of the bearing axis along its longitudinal axis, which can be arranged such that they can rotate relative to the bearing axis. The rolling elements are preferably provided for their outer surface to come into/stand in direct contact with a section of the support arm or a section of an extension of a support arm, so that the extension of the support arm can roll and/or slide along it when the telescopic function is carried out, as a result the extension or retraction of the support arm can be further simplified or made smoother. The rolling element or the rolling elements are particularly preferably a needle bearing or the like. The rolling elements particularly preferably take up only a partial section along the longitudinal axis of the bearing axis. The outer surfaces of the rolling elements also preferably represent the point or points with the largest diameter along the bearing axis, so that the section of the support arm or the extension of the support arm only comes into direct contact with the outer surface of the rolling element or elements when the Storage device is mounted on a support arm. the The rolling elements mentioned thus continue to increase the smooth running of the telescopic function and if roller or needle bearings or the like are used as rolling elements, the complexity of the bearing device does not increase either, since conventional bearing components can be used.

Furthermore, prestressing elements can also be provided in a bearing device according to the aspect mentioned above. The prestressing elements can preferably be set up to change or adjust a prestressing of the spring element(s). The prestressing elements can particularly preferably be washers or similar spacer elements, with which the length of the spring elements can be shortened in the reference position of the bearing axis in order to be able to set a corresponding prestress. Particularly preferably, the prestressing elements can be used to set a prestress in such a way that the spring elements do not yield any further than up to a predetermined end position of the bearing axis, even when the support arm is subjected to a maximum load. Likewise, the pretension can be set very finely by means of the pretensioning elements in such a way that even with a predefined minimum load on the support arms, which, for example, is greater than or equal to a predefined value above the dead weight of the respective extension or the support arm, it is reliably ensured that sinking or The load axis yields from the reference position in order to ensure contact between the extensions of the support arm in the load situation and to ensure that the telescopic function is blocked. The pretensioning elements thus allow the blocking function in particular to be adjusted more precisely and also to be adjusted at any time during operation if, for example, readjustment should become necessary due to wear.

The bearing device described above can preferably be a bearing device designed for compressive loads or a bearing device designed for tensile loads. This has the advantage that when mounting an extension within a support arm, which regularly has two end sections, a bearing device can be provided at each end section, in such a way that both a bearing device designed for compressive loads and a bearing device designed for tensile loads are installed can become; in such a way that the mechanical forces of the pull-out can be optimally absorbed.

With regard to the bearing device, which is designed for compressive loads, the connecting device preferably comprises a traverse element on which two bearing elements with a guide receptacle can be arranged. The two bearing elements are preferably each arranged on an end section of the traverse element, so that the bearing elements are arranged at a distance from one another and the traverse element can be arranged between the two bearing elements. Furthermore, the bearing axis is preferably arranged at a distance from the traverse element and is movably mounted in at least one direction of movement and preferably a single direction of movement. The direction of movement is preferably along a longitudinal axis of the bearing elements or along the guide receptacle of the bearing elements, so that a distance from the traverse element is increased or decreased depending on the load situation of the bearing axis. At least one or more spring elements is/are also preferably arranged between the traverse element and the bearing axis, which is or are compressed when the bearing axis moves relative to the bearing elements or their guide receptacles or the traverse element. The relative movement of the bearing axle is preferably caused by a load on the bearing axle or the rolling elements that can be arranged on the bearing axle, with the load acting in particular as a radial load. The radial load is triggered in particular by the dead weight of the support arm or its extensions and/or by a load on the support arm; for example when the support arm is used to lift a load.

The aforementioned connecting device with the spring element of the bearing device designed for pressure loading is a preferred example of realizing the basic technical function already explained above in a structurally less complex manner, including smooth operation of the support arm with high operating safety at the same time.

Furthermore, with regard to a bearing device designed for compressive loads, it is preferred that the adjusting element is connected to the bearing axis or can be releasably connected. Particularly preferred in such a way that a distance between the bearing axis and the traverse element can be adjusted by means of the adjusting element or by means of the actuation of the adjusting element. An imaginary/virtual longitudinal axis of the bearing axis and an imaginary/virtual longitudinal axis of the traverse element are particularly preferably arranged parallel to one another, while the spring element and the adjusting element are arranged along a cutting plane of the two imaginary longitudinal axes of the traverse element and the bearing axis, so that a distance between the Bearing axis and the truss element along the section just mentioned is arranged flat. This distance can preferably be changed by means of the adjusting element(s).

Furthermore, the traverse element can preferably have a connection section which can be set up to establish a detachable connection to an end section of the support arm of the motor vehicle lifting device. A detachable connection can be realized in particular by force-fitting and/or form-fitting connection techniques and enables a less complex, e.g. also subsequent mounting of the storage device on an extension of a support arm. Furthermore, the traverse element explained above can preferably be formed in two parts, so that a first traverse element can be connected to the named bearing elements and a second traverse element can be provided to establish the positive and/or non-positive connection between the traverse element, an end section of the support arm and the to produce the second truss element. In a two-part design of the truss element, d. H. if two traverse elements are provided, it is possible, for example, to carry out a simple clamp connection for mounting the storage device, which can be designed to be less complex and mechanically secure.

Furthermore, the bearing device designed for tensile loading can have a connecting device which can have a bearing plate on each end section of the bearing axis. The bearing plate can be connected to part of the end section of an extension of the support arm, in particular by means of a detachable fastening technique, and the bearing section can also have a guide for receiving one end section of the bearing axis. Furthermore, at least one spring element loaded in tension can be mounted or arranged on each bearing plate, it being possible for the spring element to be connectable to the bearing axis. In other words, the spring element that is subjected to a tensile load can carry the bearing axis, so that the force of its own weight and any other load acting on the bearing axis result in an elongation of the spring element. This example also enables a structurally less complex arrangement in order to provide the technical advantages of the storage device already discussed above.

Furthermore, the end sections of the bearing axle can each have a threaded hole in order to arrange an adjusting element therein, with which the relative position between the bearing axle and the bearing plate or its guide can be adjustable. Such a solution takes up very little space and thus the fine adjustment of the bearing axis reference position (or basic position) can be optimally offered.

The bearing plate can also accommodate a bearing axle receptacle that can be held by means of the spring elements, it being possible for a receiving section of the bearing axle receptacle to be designed to hold an end section of the bearing axle. The receiving section is preferably ring-shaped, so that an end section of the bearing axle can be inserted into it. This enables easy and reliable assembly.

Furthermore, one aspect of this disclosure includes a support arm for a motor vehicle lifting device, wherein the support arm can have at least one support arm receptacle, a center extension and an end extension. Preferably, the center extension and the end extension can be moved relative to the support arm receptacle (which for the sake of simplicity with regard to the description of the positioning, etc. of the storage device should also fall under the generic term of the support arm extension or extension) and along an imaginary longitudinal axis of the support arm and the End extension may also be slidable relative to the center extension to provide a telescoping function. With regard to the number of center drawers, both a single center drawer and multiple center drawers are possible within the scope of this disclosure. The center extension and also the end extension are mounted within the respective preceding component of the support arm, i.e. the first center extension is mounted, for example, within the arm mount, the second center extension is mounted within the first center extension and the end extension is mounted in a center extension, in such a way that these can be shifted against each other. It is likewise also possible for the center extension to be arranged outside of the arm mount rather than inside the arm mount, and for the end extension to be outside of the center extension. It is only decisive that a telescopic function of the support arm is produced by means of the support arm mount or the arm mount, the center extensions and the end extension. It is also possible that the support arm does not have a center extension and that the roller bearing described here is used; For example, a support arm can have only two segments, namely an arm receptacle and a final extension, and the support arm can thus also be telescoped and mounted on rollers. The support arm receptacle preferably also has the function of establishing a connection to the motor vehicle lifting device, as is customary in the art. The support arm according to this aspect also has a bearing device in each case on an end section of the receptacle or of the extensions. For example, with a support arm with an arm mount, a center extension and an end stop In addition, the configuration can be provided such that a bearing device designed for pressure loading is provided on an end section of the center extension facing away from the end extension and a bearing device designed for tensile loading is provided at an end section of the arm receptacle facing the center extension. If the central pull-out is now mounted in the support arm mount, the resulting forces are dissipated via the two named bearing devices into the support arm mount. This arrangement is preferably designed such that the bearing axis or its longitudinal axis of the bearing device designed for tensile loads is arranged below the central extension and the bearing axis of the bearing device designed for compressive loads is arranged mirror-inverted to the longitudinal axis of the central extension. In other words, an offset arrangement with respect to a longitudinal axis of the support arm of the bearing devices is preferred, which optimally ensures that the forces that arise are dissipated. Furthermore, it should also be pointed out once again that the spring elements are preferably designed in such a way or are set by means of prestressing elements and the reference position of the bearing axis is set in such a way that in an assembled state the extension is only in contact at the contact points of the bearing axis or its rolling elements with the other pull-out or the support arm mount when the support arm is unloaded and only supports its own weight. In the loaded state, on the other hand, the spring elements give way, preferably even at a predefined minimum force, so that contact occurs between the two extensions or the support arm receptacle, which are plugged into one another, which at least impedes or blocks further telescoping of the support arm.

As already mentioned above, the present disclosure also includes a support arm that has only one arm mount and one end extension, so that the support arm can be made telescopic due to the mobility of the end extension and the roller bearings analogous to the described support arm with a center extension on the end extension and the arm mount can be attached.

A bearing device for a support arm is thus offered, which is also referred to as a roller bearing, which enables simplified operability of a correspondingly equipped support arm with high operating safety. A corresponding support arm is also described by this disclosure. The preferred modifications and options to the above-described aspects of the storage device and the support arm also provide further improvements, such as i.a. a particularly smooth movement of the drawers by providing smooth-running needle bearings or comparable bearings, a finely adjustable spring support that can be used to lower the drawer(s) under load and a finely adjustable bearing of the drawers by means of optional adjustment elements that ensure the smooth running of the Can further support telescopic function. Furthermore, the bearing device can be retrofitted to a support arm that is customary in the field, and assembly is less complex and less expensive. If not just one storage device is provided for each pull-out, which is also intended to be covered by this disclosure, but two in the manner preferably described above, then an optimal force support is ensured even when the support arm is extended far and u. also prevents the pull-outs from jamming into each other.

Various examples are described in detail below with reference to the figures. Identical or similar elements in the figures are provided with the same reference symbols. However, the disclosure is not limited to the described embodiment features, but also includes modifications of features of the described examples and combinations of features of different examples within the scope of the independent claims.

• 1 einen Tragarm gemäß einem Beispiel der vorliegenden Offenbarung;
• 2 einen vergrößerten Teilabschnitt des Tragarmes gemäß 1;
• 3 Teilexplosionsdarstellung der Lagervorrichtung gemäß 2;
• 4 eine auf Druckbelastung ausgelegte Lagervorrichtung 1;
• 5 eine Explosionsdarstellung der Lagervorrichtung 1 gemäß 4;
• 6a, b exemplarisch einen Tragarm mit eingezeichneten Kräften;
• 7a bis d Detailansichten des Tragarmes im Hinblick auf die Justierung der Lagervorrichtungen;
• 8a bis d Detailansichten des Tragarmes im Hinblick auf die Justierung der Lagervorrichtungen;

Show it

• 1 a support arm according to an example of the present disclosure;
• 2 according to an enlarged section of the support arm 1 ;
• 3 Partial exploded view of the storage device according to 2 ;
• 4 a compressive load bearing device 1;
• 5 an exploded view of the storage device 1 according to 4 ;
• 6a, b a support arm with the forces drawn in as an example;
• 7a until i.e Detailed views of the support arm with regard to the adjustment of the storage devices;
• 8a until i.e Detailed views of the support arm with regard to the adjustment of the storage devices;

1 1 shows an example of a support arm 100 according to the present disclosure, which in the case shown has a single center pull-out 120, which is shown as an example and is arranged within a support arm receptacle 110 and is provided such that it can be retracted or extended along an imaginary longitudinal axis of the support arm. Continue towards an end extension 130 is shown, which is arranged in this example within the single central extension 120, retractable or extendable and with which a pickup point or a pickup plate 140 is connected, which is adapted to contact with an object to be lifted, such as for example a motor vehicle. Furthermore, 110 connecting sections 111 are shown in an end region of the support arm receptacle, which are conventionally provided for a mechanical connection z. B. to be able to produce a stand or a column of the motor vehicle lifting device. Also in the representation according to 1 For example, on an end section of the support arm receptacle 110 opposite the connecting sections 111 (this end section is identified by reference numeral 102), a bearing device 10 that is subjected to a tensile load or is designed for a tensile load is mounted. This bearing device 10, which is designed for tensile loading, is releasably mounted by means of fastening means BF, which in this case can be screws, for example. Furthermore, a break-out in the area of a rear end section of the center pull-out 120, which is marked with the reference number 101, is drawn in, so that the view of a storage device 1 designed for compressive loads is exposed.

2 shows an enlarged section of the 1 in the region of the end section 102 of the support arm receptacle 110, on which a bearing device 10 designed for tensile loading is mounted by means of the fastening means BF. 2 FIG. 12 shows an isometric view in the assembled state, with the support arm receptacle 110 shown cut away. As can be seen, the bearing axle 50 is held in the assembled state by spring elements 71 designed for tensile loading, which are arranged on both sides of the bearing axle and are shown here as spiral springs by way of example, and a receiving section 14 which is connected to the tension springs 71. In the example, two spring elements 71 are shown on each side of the bearing axle 50, this number being an example and more or fewer spring elements 71 per side being able to be provided. The tension springs themselves are attached using screws S1 and S2 (or other comparable components) in an in 2 not visible end shield 11 mounted. Rolling elements 90, which are shown here as needle bearings, are also mounted on two sections of the longitudinal axis 50, so that on their outer surface there is contact with the in 2 Center pull-out 120, not shown, can be produced.

The more precise technical mode of operation results from the in 3 illustrated partial exploded drawing of the bearing device 10 designed for tensile loading.

the 3 shows specifically an exploded view of the side of the storage device 10, the elements and components of which can be identified in the figures and also below with the suffix "a" in the reference number. The parts and components of the other side of the storage device 10 that are not shown in the exploded view, which can also be identified in the figures and the following description with the suffix “b” in the reference number, are preferably designed analogously to the parts described in detail below. The description is therefore made in detail for only one page. The bearing device 10 can have a cover 15 which can be designed as a sheet metal element or plastic element and covers the components of the bearing device 10 described below. Furthermore, the 3 the bearing plate 11a, which on the one hand has bores for the fastening means BF and a centering pin ST1, so that the bearing plate and the cover 15 can be detachably fastened to the end section 102 of the support arm receptacle by means of a screw connection. In the direction of the imaginary longitudinal axis of the bearing axis 50, which is arranged perpendicularly to the longitudinal axis of the support arm or the end mount 110, the two tension springs 71 are located further inside the bearing plate 11a, which can be detachably connected to the bearing plate by means of screws S3 and S4 and which further hold a bearing axle receptacle 13a with the receptacle portion 14a. The bearing plate 11a is preferably filled in an angular shape, on the one hand to save material and weight and on the other hand to ensure that a section of the angular shape in which the guide 12a is arranged can hold the bearing axis 50 perpendicular to the longitudinal axis of the support arm receptacle. As shown, the end section 50a of the bearing axle 50 has a threaded bore GB into which the adjusting element 80, which in this case can be a pin or threaded pin, can be inserted or screwed. Similarly, the other side 50b also has a threaded hole GB (not shown), into which an adjusting element 80 can also be inserted.

Furthermore, the bearing axle 50 has a threaded section on which the rolling element 90 is arranged, like that shown on the assembled side or on the side of the non-exploded view 3 is pictured. Shifting or slipping of the rolling element 90 in the longitudinal direction can optionally be prevented by means of a pin ST2 or ST3. This pin can be an insert pin or a threaded pin. The end section 50a or 50b on the other side of the longitudinal axis 50 is arranged in the assembled state within the guide section 12a or 12b of the end shield 11a or 11b, so that the longitudinal axis 50 is movably mounted along the exception of the guide 12a or 12b is. The mobility of the longitudinal axis 50 relative to the guide 12 is made possible, inter alia, as follows: The receiving section 14 encloses the end section 50a or 50b of the bearing axis 50, with the end sections 50a or 50b being pushed or plugged into the annular receiving section 14 and these receiving sections 14 are part of the bearing axle receptacle 13a and 13b, respectively, which are held by the tension springs 71. The tension springs 71 are connected to the bearing plate 11 by means of the screws S1-S4, and a deflection of the tension springs 71 thus causes the bearing axis 50 to move along the guides 12a, b. In other words: Is applied to the in 3 visible part of the lateral surface of the bearing axle 50, i.e. the upper area in this illustration, a force is exerted in the radial direction and in particular perpendicularly to the longitudinal axis of the bearing axle 50, the tension springs 71 are guided and there is a movement of the longitudinal axis along the guides 12a or 12b instead. The movement can preferably be limited by means of a limitation 16a, b, which can be arranged as a projection or taper within the guide 12a, fb. The limitation 16 thus offers a defined end point for the (relative) movement of the bearing axis 50.

From the synopsis of 2 and the 3 it is thus evident that a movement of the bearing axle 50, which leads to an extension of the tension springs 71, has the result that the bearing axle 50 and the slide-out mounted on it (the one shown in Fig 2 and 3 is not shown, but in 1 ) drops, so that contact with the support arm receptacle or with the lower wall area of the support arm receptacle 110 is generated, which makes it difficult or impossible to pull it out. In the unloaded state, on the other hand, which corresponds in particular to a state in which only the weight of the extension rests on the bearing axis 50 or the rolling elements 90, the tension springs 71 hold the bearing axis 50 in the basic or reference position, in no (large-area) contact between the lower wall of the support arm receptacle 110 and an outer wall or outer surface of the drawer. This enables a smooth-running telescopic function or the ability to pull out or retract the pull-out, which is not shown.

Furthermore, the 4 a designed for a compressive load bearing device 1, wherein the 4 such shows in the unloaded state. the 5 then further shows an exploded view of the bearing device 1 according to FIG 4 . Concretely shows the 4 an end section 101 of a center extension 120 (shown in section), at the end of which a bearing connection section 121 on the extension side is integrally provided, this having a recess 122 in the corner area of the end section 101 and in the area of the recess 122 a substantially cross-shaped section 123 protrudes, the wing elements 123a and 123b. The function of shaping the cross-shaped portion 123 is in connection with the 5 to be explained further. Furthermore, it should also be made clear here that the suffixes “a” and “b” explained in connection with the figures described above can be used analogously and also the components of the bearing device 1, as in the case of the bearing device 10 subjected to tensile loads, on both sides of the bearing device accordingly are constructed so that only the components on one side are described as an example.

In addition, the 4 in this exemplary illustration, two spring elements 70, which in this example are springs or coil springs that can be subjected to pressure, and prestressing elements 2, which are each arranged on one end side of the spring elements 70 in order to be able to adjust the prestressing of the spring elements 70 by means of the height of the prestressing elements 2. The biasing elements 2 are optimally standard components such. B. washers, with different height. The spring elements 70 bear on the sides of the biasing elements 2, as in FIG 4 shown, against a traverse element 3, whose imaginary longitudinal axis is parallel and spaced from the imaginary longitudinal axis of the bearing axis 50 is arranged. A bearing element 4a or 4b is located at the side of the traverse element 3 and can be plugged into the traverse element 3, for example by means of a recess 7 within the bearing elements 4a or 4b. Another type of connection as well as a permanent material connection between the bearing elements 4 and the traverse element 3 is also covered by the disclosure. The bearing elements 4a and 4b are, as in the 4 shown, perpendicular to the imaginary longitudinal axis of the traverse element 3 and have guide receptacles 5a or 5b on an end region opposite the traverse element 3, which preferably can accommodate an end section 50a or 50b of the bearing axis 50 with a precise fit or with little play. The longitudinal extent of the guide receptacles 5a and 5b in the direction of the traverse element is preferably set up in such a way that a predefined maximum deflection of the bearing axis 50 is set or defined when the bearing axis 50 is subjected to a pressure load. The guide receptacles 5a and 5b can be, for example, U-shaped recesses within the bearing elements 4a and 4b. The bearing axle 50 as well as the spring elements 70 and also the prestressing elements 2, if such should be provided, are held in position, of which only sections in 4 visible adjustment elements 80, which are not in 4 Visible holes through the traverse element 3 are passed through and also by the biasing elements 2 and the spring elements 70 to be releasably secured within threaded holes B1 / B2 within the bearing axis 50. For this purpose, the adjusting elements 80 are preferably plug-in screws, threaded pins or the like. Depending on how far the adjusting elements 80 are screwed into or out of the bores B1 or B2 of the bearing axle 50, a reference or basic position of the bearing axle 50 can be set. This basic or reference position of the bearing axis 50 is preferably set in such a way that when the corresponding pull-out (here the central pull-out 120) is in the assembled state, the rolling elements 90 are arranged with their lateral surface at a predefined distance above the upper outer surface of the central pull-out 120.

the 5 12 now shows further details of the above-described bearing device 1 and, in particular, the exploded view clearly shows the adjusting means 80, which are designed as screws or threaded pins, and, as can be seen in the exploded view using the dash-dotted lines, through bores within the traverse element 3, are inserted through the washers 2 along the virtual longitudinal axis of the spring elements 70 into the bores B1 and B2 of the bearing axle 50. Furthermore, the 5 It is also clear that a coupling section 8 is arranged on both sides of the traverse element 3, which can be connected with a substantially U-shaped basic shape with a precise fit to the wing elements 123b of the cross-shaped section 123 of the center extension 120. In a preferred embodiment, in addition to the first traverse element 3, there is also a second traverse element 3a, as is the case with FIG 5 shows, which also has an end-side coupling section 8a, which can be positively connected to the wing elements 123a of the center extension 120. The second traverse element 3a can be connected to the first traverse element 3 by means of a screw connection comprising, for example, screws 9a, washers and spacer elements 9c and 9b and lock nuts 9d such that the cross-shaped section 123 of the center extension 120 can be connected in a non-positive manner.

the 6a and 6b now show an example of a support arm with a center pull-out 120, which is mounted by means of a bearing device 1 and 10 designed for compressive and tensile loads. The bearing device 1 designed for compressive loads is preferably arranged on an end section of the center extension 120 in such a way that the rolling elements 90 and the bearing axis 50 are in contact with an upper inner surface of the support arm receptacle 110, while a bearing device 10 designed for tensile loads is at one end section the Tragarmaufnahme 110 is arranged such that the bearing axis 50 and the rolling elements 90 are in contact with a lower outer surface of the center extension 120, as both the 6a as well as the 6b represent. These are in particular with regard to the storage device 1, which is designed for compressive stress, outbreaks in the drawings 6a and 6b according to the 1 intended.

Furthermore, the two show 6a and 6b also a center of gravity, which is shown with M as the center of mass, and bearing or supporting forces, which are marked with bold arrows and F. When the support arm 100 is retracted, the supporting force FA is at its maximum and at most half the mass M (weight) of the support arm 100. When the support arm 100 is fully extended, as is possible during operation, the reaction force associated with FRL2 in 6b is marked, however, be a multiple of the mass of the support arm 100. Furthermore, it applies that when the support arm 100 is extended, the center of gravity of the mass M can be to the right of the bearing 10 or the bearing device 10, and the force that is identified by FRL1 is equal to the sum of the force FL2 and the mass M. This results in the following technical requirements with regard to the setting of the bearing devices 1 and 10 or their spring forces, which are solved in a technically advantageous manner by the present disclosure or the subject matter of the patent claims. In concrete terms, it should be noted that the bearing device 1, 10 should completely bear the weight of the unloaded support arm 100 with the mass M, so that smooth operability of the telescopic function of the support arm 100 can be ensured. However, for safety reasons, shifting or movement or execution of the telescopic function under load, for example when a vehicle is being raised, is not permitted. The inventors of the present disclosure have solved this in such a way that at a predefined load, which is greater by a predetermined amount than the mass M of the support arm 100, the bearing device 1, 10 settles mechanically, since the forces of the spring elements 70, 71 are exceeded or these are stretched or subjected to pressure so that they yield and a force is built up between the pull-out wall surfaces, which blocks the telescopic function. The predetermined amount can be less than one kilogram or particularly preferably a few kilograms, for example 1 to 10 kg or even more. With regard to the forces on the storage devices 1 and 10, which are not constant and vary depending on the position of the drawers, it should also be noted that the spring force must not be too small, otherwise the technical advantage of easy operability would not exist if the storage devices 1 and 10 the Could not keep mass of the unloaded support arm 100 or of its respective excerpt. On the other hand, if the spring force was too great, the individual extensions would be lifted or pushed up too much, so that the extensions would jam or jam, which would also impede the telescopic function.

It is also technically particularly advantageous with regard to operability and operational safety if the spring deflection of the spring elements 70, 71 can be mechanically limited and the spring force can be greater than the maximum mass M and optimally adjustable. This is achieved in the best possible way by the storage devices 1, 10 described above and the optional features.

the 7a until i.e and 8a until c then show further necessary considerations with regard to the design and dimensioning of the two storage devices 1 and 10. The 7a until 7d show the bearing device 10 designed for tensile loading 7b a partial section of the support arm 100 with partial representations of the support arm receptacle 100 shown in cutout, the central extension 120, the end extension 130 and part of the receptacle 140, wherein the bearing device 10 designed for tensile loading is attached to the support arm receptacle 110 in an end area by means of the fasteners BF and the Veneering 15 is shown partially broken away in order to show the underlying components of the bearing device 10 which is subjected to tensile loading or is designed. Further details will then be shown in the 7c and 7d the storage device 10, wherein in the 7c part of the bearing plate 11a is also drawn cut away in order to reveal the view of the spring elements 71, their fastening screws S3 and S4 and the support element 14 of the bearing axle 50. It is already evident in the 7c that the guide 12a is limited by means of the protrusions 16 in a predetermined maximum deflection point of the bearing axis 50, so that the bearing axis 50 cannot deflect beyond the position formed by the protrusions 16. Furthermore, the 7d the bearing plate 11a and the arrangement of the bearing axis 50 within the guide 12a, wherein in the 7d a part of the adjustment means 80, which is screwed or arranged inside a bore of the bearing axle 50, also becomes visible. The further the adjustment means 80 on the in 7d point shown exits the bearing axis 50, the further a distance between the bearing axis 50 and the screws S3 and S4 is preset (as a reference or basic position), so that a distance X above it, which is shown in 7a is shown, is adjustable between an upper outer wall of the center extension 120 and an inner wall of the support arm receptacle 110 such that there is no contact between these surfaces/walls.

Furthermore, the 8a until 8d the setting of the designed for compressive load storage device 1, wherein the 8a again the already in connection with the 4 and the 5 shown components of the bearing device 1 represents and 8b a part of the installation situation in the assembled state of the support arm 100. The 8c then shows the effect of an adjustment of the reference position of the bearing axis 50 by means of the adjusting means 80 based on the distance Y in the 8c is arranged or shown between an upper inner wall of the support arm receptacle 110 and an upper outer wall of the center extension 120 . Furthermore, an adjustment of the reference position of the longitudinal axis 50 also affects the distance Z, which the 8d shows between a lower inner wall and a lower outer wall of the support arm receptacle or the center extension. In the unloaded state, both distances Z and Y should be large enough that there is as little contact as possible between the mentioned surfaces of the extensions or support arm mount, in order to ensure that the telescopic function can be operated easily. This can be done easily and without great effort by means of a fine adjustment of the adjusting elements 80 .

In summary, a storage device 1, 10 and a telescoping support arm 100 with at least one such storage device 1, 10 are described here. The use of at least one bearing device 1.10 on a support arm 100 means that the telescopic function is smoother or easier to use and at the same time it is possible to block this function in order to produce maximum operating safety.

Reference List

1

Bearing device under pressure

2

biasing element

3, 3a

truss element

4a, b

bearing element(s)

5a, b

guide mount(s)

6

(threaded) bore

7

recess

8th

coupling section

9a-d

screw connection

10

Bearing device under tension

11a, b

end shield(s)

12a, b

Guides)

13a, 13b

Bearing axis mount

14

recording section

15

infatuation

16

boundary element

50

bearing axis

50a, b

End section(s) of bearing axle

B1, B2

threaded hole

60

connecting device

70

spring element

71

Spring element loaded on train

80

adjustment element

90

rolling element

100

Beam

101

End section of center pull-out

102

End section support arm mount

110

support arm mount

111

connecting sections

120

center pull-out

121

Drawer-side bearing connection section

122

recess

123

Cruciform Section

123a, b

wing

130

final statement

140

pickup point/plate

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 202006007156 U1 [0002]

Claims (17)

Bearing device (1; 10) for a support arm (100) of a motor vehicle lifting device - a bearing axis (50) for contacting a section of the support arm (100) of the motor vehicle lifting device, - A connecting device (60) which is set up to connect the bearing axle (50) to a portion of the support arm of the motor vehicle lifting device, and - A spring element (70) which is set up to mount the bearing axis (50) in a movable manner. Storage device according to Claim 1 characterized by an adjusting element (80) which is set up such that by means of an actuation of the adjusting element (80) a relative reference position between the bearing axis (50) and the connecting device (60) can be changed. Bearing device according to at least one of the preceding claims, characterized in that the bearing axis (50) has a threaded bore (B1, B2) in which the adjusting element (80) can be arranged, the relative reference position between the bearing axis (50) and the connecting device ( 60) by moving the adjusting element (80) in or out of the threaded bore (51) of the bearing axle (50). Bearing device according to at least one of the preceding claims, characterized in that the bearing axis (50) has a cylindrical basic shape and an annular rolling element (90) is arranged so as to be rotatable about the bearing axis (50). Bearing device according to at least one of the preceding patent claims, characterized by prestressing elements (2) which are set up to change a prestressing of the spring element (70). Bearing device according to at least one of the preceding patent claims, characterized in that the bearing device (1; 10) is a bearing device (1) designed for pressure loading or a bearing device (10) designed for tensile loading. Storage device according to claim 6 , characterized in that the connecting device (60) of the bearing device (1) designed for compressive loads has a traverse element (3) on which two bearing elements (4a, 4b) each having a guide receptacle (5a, 5b) are arranged at a distance from one another and one Mount the bearing axis (50) at a distance from the crossbar element (3) so that it can move in one direction of movement, with at least one spring element (70) being arranged between the crossbar element (3) and the bearing axis (50) which, when the bearing axis (50) moves relative to the Bearing elements (4a, 4b) is compressed. Storage device according to Claim 7 , characterized in that at least one adjusting element (80) is connected to the bearing axis (50), so that a distance (L1) between the bearing axis (50) and the traverse element (3) can be adjusted by means of the adjusting element (80). Storage device according to at least one of Claims 7 until 8th , characterized in that the traverse element (3) has a connecting portion (121) which is adapted to produce a detachable connection to an end portion (101) of the support arm (100) of the motor vehicle lifting device. Storage device according to at least one of Claims 7 until 9 , characterized in that longitudinal axes of the traverse element (3) and the bearing axis (50) are arranged parallel to one another and a longitudinal axis of the spring element (70) and the adjusting element (80) is arranged along a cutting plane of the two longitudinal axes. Storage device according to at least one of Claims 7 until 10 , characterized in that the traverse element (3) is designed in two parts and a first traverse element (3) can be connected to the bearing elements (4a, 4b) and a second traverse element (3a) for producing a positive and/or non-positive connection between the first Traverse element (3a), an end portion (101) of the support arm (100) and the second traverse element (3b) is formed. Storage device according to claim 6 , characterized in that the connecting device (60) of the bearing device (10) designed for tensile loading has a bearing plate (11a, 11b) on each end section (50a, 50b) of the bearing axis (50), which is connected to an end section (102) of the support arm (100) of the motor vehicle lifting device can be connected, the bearing plates (11a, 11b) each having a guide (12a, 12b) for receiving an end section (50a, 50b) of the bearing axle (50), and each having a spring element ( 71) is arranged on the end shields (11a, 11b), which can be connected to the bearing axle (50). Storage device according to Claim 12 , characterized in that the end sections (50a, 50b) of the bearing axle (50) each have a threaded bore (51) and an adjusting element (80) can be arranged therein, so that by changing the relative position between the adjusting element (80) and the bearing axle (50), a relative position between the Bearing axis (50) and the end shield (11a, 11b) is adjustable. Storage device according to at least one of Claims 12 until 13 , characterized in that on each bearing plate (11a, 11b) there is a bearing axle receptacle (13a, 13b) which is held by means of the spring element (71) and which has a receptacle section (14) for holding an end section of the bearing axle (50). Support arm for a motor vehicle lifting device comprising a support arm receptacle (110), at least one center extension (120) and an end extension (130), at least one center extension being arranged within the support arm receptacle (110) so that it can be displaced in its longitudinal direction and the end extension in a central extension in its Is arranged to be displaceable in the longitudinal direction, characterized in that the support arm receptacle (110) has a bearing device according to at least one of the Claims 12 until 14 and the center extension has at least one storage device according to at least one of Claims 7 until 11 having. Support arm for a motor vehicle lifting device comprising a support arm mount (110) and an end extension (130), the end extension (130) being arranged within the arm mount so that it can be displaced in the longitudinal direction thereof, characterized in that the support arm mount (110) has a bearing device at one end section according to at least one of the Claims 12 until 14 and the end extension (130) has at least one storage device according to at least one of Claims 7 until 11 having. Support arm according to Claim 15 or 16 , characterized in that the support arm has two bearing devices for supporting a center extension, which are arranged offset to one another with respect to a longitudinal axis of the support arm, or the support arm has two bearing devices for supporting an end extension (130), which with respect to a longitudinal axis of the support arm are offset to each other.

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