EP3013730A1

EP3013730A1 - Lifting apparatus for lifting and lowering vehicles, loads or the like

Info

Publication number: EP3013730A1
Application number: EP14736694.2A
Authority: EP
Inventors: Dieter Benz
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-27
Filing date: 2014-06-27
Publication date: 2016-05-04
Anticipated expiration: 2034-06-27
Also published as: KR20160024951A; US20160122168A1; US20160145085A1; DE202013102803U1; CN105307969A; WO2014207218A1; KR102243716B1; CN105307969B; KR102271795B1; US10077178B2; US9714160B2; WO2014206668A1; US9701526B2; CN105452149A; CN105517945A; EP3013729B1; US20160137470A1; EP3013729A1; KR20160024950A; CN105517945B

Abstract

The invention relates to a lifting apparatus for lifting and lowering vehicles or the like, comprising a support (17) which is movable up and down and on which a load receiving means (18) is provided, said load receiving means (18) having at least one supporting arm (21). An articulated connection (24) is formed between the supporting arm (21) and an add-on part (71) and once the add-on part (71) is oriented in an angular position with respect to the supporting arm (21), the add-on part (71) and the supporting arm (21) are mountable and fixable with respect to each other by means of a toothed element (83), a blocking element (84) and a lock pin (73).

Description

Lifting device for lifting and lowering vehicles, loads or the like
The invention relates to a lifting device for lifting and lowering of loads, vehicles or the like with a movable up and down carrier on which a load-receiving means is provided, wherein the load-receiving means comprises at least one support arm or an attachment.
From DE 691 07 560 T2 a two-post lift is known which consists of two lifting columns and on the lifting columns movable up and down carriers. On each carrier two articulated arms are provided as pivotable support arms, which are pivotable and positionable with their load-receiving element below a vehicle to be lifted to the load receiving points located there. To secure the adjusted position of the support arms to the carrier, a locking device is provided, which is unlocked at a lowered support, so that the support arms are freely pivotable. Immediately after the start of a lifting movement of the carrier, the set positions of the support arms are fixed to the support by the locking device, so that the set Tragarmposition remains preserved to the vehicle. The locking device comprises a frusto-conical gear on which a complementarily formed frusto-conical sprocket for rotationally fixed fixing of the support arm can be placed. Between the support arm and the carrier, a pivotal connection is formed, which does not allow disassembly and replacement of the support arm to the carrier. Rather, a permanent connection is provided by the structural arrangement.
The invention has for its object to provide a lifting device for lifting and lowering vehicles, loads or the like, which a simple and quick attachment and fixation of an attachment to the carrier or the support arm and a simple adjustment of an angular position of the attachment to the support arm or Carrier allows.
This object is achieved by a lifting device according to the features of claim 1. Further advantageous embodiments are specified in the further dependent claims.
According to a first embodiment of the lifting device according to the invention, it is provided that between the carrier and an attachment or between the support arm and an attachment a hinge connection is formed, in which after aligning the attachment to the carrier or support arm in an angular position to each other and a subsequent positioning of a respective Longitudinal axis of at least one bore on the carrier or support arm and a longitudinal axis of at least one bore of the attachment a positive locking of the attachment to the support or support arm for maintaining the angular position is formed and the carrier and the attachment or the support arm and the attachment by a in the holes insertable locking pins are fixed to each other. This arrangement allows easy handling both for the exchange of different attachments on the carrier or the support arm as well as an adjustment of an angular position of the attachment to the carrier or support arm for subsequent lifting and lowering in particular of vehicles. Due to the positive locking of the attachment to the carrier or support arm additional locking of the pivot assembly is not necessary. Rather, a backup of this angular position can be achieved simultaneously with the positioning of the attachment to the support arm or carrier. The simple insertion of a plug pin to form the hinge connection and simultaneous positive locking a simple handling and an exchange or adaptation in the angular position of the attachment to the support or support arm is possible. This enables a robust mechanism that can withstand harsh workshop operation.
An alternative embodiment of the invention provides that after positioning a respective longitudinal axis of at least one bore of the support or support arm and at least one bore of the attachment to each other, these are rotatably mounted to each other by inserting a pin and the attachment and the support or the support arm along a longitudinal axis of the plug pin are movable relative to each other, wherein in a setting position of the attachment to support or support arm, the attachment is freely pivotable and in a working position after an axial movement between the attachment and the support or support a positive locking is formed and a set angular position of Attachment is fixed to the carrier or support arm. In this embodiment according to the invention, a handling according to the first described embodiment can be carried out. Alternatively, it can also be provided that first the articulated connection is produced, followed by a relative movement between the attachment and support or support arm to form the interlocking locking takes place to the subsequently set angular position, which is secured by the positive locking. For example, it can be provided in this embodiment, that by adjusting the attachment manually relative to the support or support arm, an adjustment of the angular position of the attachment to the support or support arm and by a subsequent lowering of the attachment by gravity, the interlocking locking is taken. This allows an even easier handling for adjusting the angular position of the attachment to the support or support arm, without the locking pin is removed from the hinge connection. This embodiment has the advantage that to change the angular position, only the securing element is to be removed from the swivel assembly in order to release the positive locking by changing the position of the attachment in the vertical direction, and then by a rotational movement about a vertical longitudinal axis of the plug pin a adjust the new angular position of the attachment. Subsequently, for example, by a lowering movement of the attachment or a lifting movement of the carrier or the support arm, a positive locking and then an insertion of the securing element to maintain the positive locking done.
In the first embodiment of the positive locking, the blocking element has a holding section, in particular a clamp-shaped holding section, on which the at least one toothed element or the at least one pin element is preferably integrally formed. The blocking element can thus be advantageously formed as a simple punching or laser part, which by means of the holding portion on the support or support arm or the attachment in a simple manner, for example by clamping or pressing, can be fastened.
According to a first embodiment, the toothed element of the positive locking advantageously extends along an angular range for an adjustable angular positioning of the attachment to the carrier or support arm, wherein along the angle range an arc segment with a toothing is provided. In this case, the toothing element may also have two or more spaces for positioning the blocking element. For example, two to five spaces may be sufficient, which advantageously extend through an angular range of at least 10 ° to a maximum of 180 °.
The toothing element of the first embodiment of the positive locking is preferably plate-shaped and has adjacent to the toothing a bore through which the locking pin can be passed. As a result, additional centering of the toothed element to the longitudinal axis of the plug pin or the pivoting arrangement can take place. In addition, the toothed element opposite a fastening portion may be provided to fix the toothed element on the support or support arm, in particular load-receiving element of the support or support arm.
According to an alternative embodiment of the invention, it is provided that the positive locking is formed by two or more end faces arranged at an angle to a load-receiving element of the carrier or support arm, which engages positively on at least one contact surface or on complementarily shaped contact surfaces on the attachment. Thus, as an alternative to an additional blocking and toothing element, the load-receiving element itself as well as the attachment can be used for a positive locking. The end surfaces on the carrier or support arm and attachment are preferably aligned in a plane parallel to the longitudinal axis of the bore or of the plug pin and arranged radially to the longitudinal axis of the bore in the load-receiving element.
Another alternative embodiment for a positive locking between the attachment and the carrier or support arm is given by the fact that the at least one bore on the support or support arm, as well as on the attachment has an internal toothing and the locking pin is provided with an external toothing and insertion of the plug pin in the at least one bore of the carrier or support arm and the attachment a positive locking is formed. As a result, the use of an additional gear element and blocking element is unnecessary, since the tooth or pin elements are provided directly on the outer circumference of the plug pin and on the inner circumference of the at least one bore on the carrier or support arm and attachment.
A further advantageous embodiment of the alternative embodiment of the invention provides that the attachment has a fork-shaped connection piece and the carrier or the support arm has a plate-shaped load-receiving element, each with a bore for the locking pin. As a result, defined connection points can be created and various and various attachments can be arranged on the carrier or support arm.
A preferred embodiment provides that the fork-shaped connecting piece has a gap which comprises at least the thickness of the load-receiving element and the thickness of a locking element or blocking element. As a result, in accordance with the first embodiment of the invention, the load-bearing element of the support arm or carrier can be easily guided into the attachment part. Furthermore, it can preferably be provided that the fork-shaped connecting piece has a gap, which comprises at least the thickness of the load-receiving element and at least twice the thickness of a toothing or blocking element. Thereby, a relative movement between the load-receiving element and the fork-shaped connecting piece is possible, through which the positive locking can be solved without the locking pin is removed from the fitting of the attachment and the carrier or support arm. Thus, for example, with a lowered load bearing for adjusting the angular position of the attachment to the support or support arm, the attachment can be manually raised to subsequently pivot in the desired position and take the form-locking lock independently again by a subsequent lowering of the attachment.
Furthermore, it can preferably be provided that a releasable locking element acting on the plug bolt secures the working position of the attachment to the carrier or support arm. By introducing the securing element in the remaining space when taking the positive locking between the load-receiving element of the support arm or carrier and the connector, the set angular position can be secured so that a pivoting movement of the attachment to the carrier or support arm is not possible without removal of the securing element.
Subsequently, a free pivotal movement of the attachment to the support arm or carrier is possible, wherein the thickness of the securing element corresponds to the thickness of the blocking elements and Vezahnungselemente to ensure after removal of the securing element complete disengagement of the blocking elements of the teeth.
Furthermore, it is preferably provided that the securing element is designed as a releasable fastening means which can be arranged on or in the locking pin or the locking pin can be inserted into the fastening element. The securing element can preferably be arranged between the plate-shaped load-receiving element and the fork-shaped connecting piece. As a result, a compact and secure arrangement can be created.
According to a preferred embodiment of the invention it is provided that the locking pin after positioning of the attachment to the support arm or the carrier is inserted from above and forms a hinge connection. This also allows an additional securing of the bolt can be omitted, since in particular under a load acting on the attachment part of the bolt is not removable.
The invention and further advantageous embodiments and developments thereof are described in more detail below with reference to the examples shown in the drawings and explained. The features to be taken from the description and the drawings can be applied individually according to the invention individually or in combination in any combination. Show it:
FIG. 1 shows a perspective view of a lifting device forming a two-column lift,
2 shows a perspective view of an attachment to a support arm,
3 is a perspective view of an alternative embodiment of an attachment to a support arm to Figure 2,
FIG. 4 shows a perspective view of a further alternative embodiment of an attachment on a support arm to FIG. 2,
5 is a schematic view of a positive locking for positioning the angular position between the attachment and the support arm in Figure 4,
6 shows an exploded perspective view for explaining an assembly of an attachment to a support arm according to an embodiment in FIG. 4, FIG.
FIG. 7 shows a schematic view of an alternative embodiment of a form-locking latch to FIG. 5,
Figure 8 is a perspective view of an alternative embodiment of a hinge connection to Figure 5 and
FIG. 9 shows a further perspective view of the alternative embodiment according to FIG. 8
In Figure 1, for example, a two-post lift 11 is shown in perspective, which comprises two associated lifting devices 12. This lifting device 12 comprises a lifting column 14, which is firmly connected, for example, with a base plate 16 which is fixedly connected to a substrate. A carrier 17 is provided along a lifting axis 15 of the lifting device 11 movable up and down. The carrier 17 receives a load-receiving means 18. The load-receiving means 18 comprises a housing portion 19 which is at least partially closed, at the respective outer ends of which support arms 21 are pivotably received about a vertical pivot axis 22. These support arms 21 are formed, for example, telescopic and have the pivot axis 22 opposite load-receiving elements 23 and precautions to various support elements or attachments 71 (see Figure 2 ff.) Replaceable to arrange it.
The carrier 17 further receives a drive device 25. This may be formed electro-hydraulically, hydraulically or mechanically and has according to the illustrated embodiment, a hydraulic unit. This drive device 25 is monitored and controlled by a controller 26. For energy supply, for example, at least one accumulator 27 may be provided. The controller 26 operates advantageously wirelessly. In particular, a remote control may be provided to control the lifting devices 12. In particular, the two mutually associated and opposite lifting devices 12 wirelessly communicate with each other to ensure, for example, a simultaneous initiation of a lifting and lowering movement and a mutual monitoring of synchronization or the like. Alternatively, 12 supply lines and / or control lines may be provided between the two lifting devices, so that both control signals and a power supply are made possible by cable.
The carrier 17 is sleeve-shaped or cartridge-shaped and surrounds the lifting column 14. In this arrangement, it is therefore provided that the drive spindle or the hydraulic cylinder for raising and lowering the carrier 17 is disposed within the lifting column 14. The hydraulic cylinder is supported on the one hand at a lower end of the lifting column 14 and the base plate 16 and engages the upper, inner end portion of the carrier 17. To guide the carrier 17 to the lifting column 14 guide elements 29 are provided therebetween, which may be formed, for example, as a roller or sliding elements or as a combination thereof. Between the lifting column 14 and the carrier 17 further comprises a fall arrester 32 is provided, by which after the activation of a lifting movement of the carrier 17, a deactivation or a Stromlosschaltung an adhesive magnet of the fall arrest occurs and a locking element makes a backup of the set stroke position.
An alternative embodiment of the lifting device 12 provides that the lifting columns have a U-shaped cross section, within which the carrier is guided movable up and down, wherein the at least partially closed housing portion 19 arranged analogously to the lifting device 12 according to Figure 2 on the carrier 17 is to the
Support arms 21 record.
In this illustrated embodiment, the support arm 21 is formed for example as an extendable support arm and consists of at least one Tragarmstück 58 which is inserted into a Tragarmkörper 52 and slidably mounted therein. This Tragarmkörper 52 has a box-shaped housing in the form of a square. On Tragarmstück 58 or as exemplified in the exemplary embodiment in Figure 1, on the second Tragarmstück 59, the load-receiving element 23 is arranged.
FIG. 2 shows a perspective view of the support arm 21 with a load-receiving element 23 arranged thereon, to which an attachment 71, for example in the form of an extension of the support arm 21, is attached. This attachment 71 has a U-shaped or fork-shaped receiving portion 72 which engages around the load-receiving element 23, which is preferably plate-shaped. The load-receiving element 23 has at its free end end faces 76, which are aligned parallel to the longitudinal axis 79 of a bore 78 in the load-receiving element 23 (Figure 1). For example, two V-shaped end faces 76 are provided to accommodate the attachment 71 in two predetermined angular positions can. In the bottom of the U-shaped receiving portion 72 at least one contact surface 80 is formed, which abuts at least one of the end surfaces 76 and after the insertion of a plug pin 73 in bores 81 of the receiving portion 72 and the bore 78 a positive locking 75 with respect to the angular position of the fixture 71st given to the support arm 21. Depending on the angularity of the mutually arranged end surfaces 76, the orientation of the attachment 71, whereby their orientation is influenced to the carrier 17 in the lifting column 14 takes place.
Alternatively, instead of only two end faces 76, a plurality of end faces 76 may also be provided, which are aligned at a predetermined angle to one another. Advantageously, the juxtaposition of the end faces 76 takes place at the same angle, so that each end face 76 acts on the contact surface or surfaces 80 in accordance with the angular position on the abutment surface 80 and the positive lock 75 is formed.
By this arrangement, a simple replacement of the attachment to the support arm 21 as well as a simple alignment in the angular position of the attachment 71 to the support arm 21 is made possible. It is sufficient only plugging the plug pin 73 for connection of the attachment 71 to the support arm 21 to form the hinge connection 24 and maintaining the interlocking locking 75th
The above-described embodiment applies analogously to the attachment of the attachment 71 directly to the carrier 17. Such an embodiment is provided, for example, when the attachment 71 serves as a holder or receptacle for a Radgreiferelement or a Radauflageelement or two on the carrier with spaced-apart attachments 71 for receiving a running rail. Furthermore, it may be provided that in a lifting device consisting of four lifting columns 14 each two adjacent lifting columns 14 are connected to a running rail, wherein the running rail are received by attachments 71 on the support 17 or the support arm 21 and the width of the lane by the distance of Rails or the respective opposite lifting columns 14 or by telescopic support arms 21 is adjustable.
The attachment 71 according to Figure 2 may further comprise a bore 74 which is spaced from the bore 78, for example, to use rubber pads or other load-receiving means, which are provided for attachment to load-receiving points of a vehicle.
FIG. 3 shows an alternative embodiment to FIG. This embodiment differs from the figure 2 that the U-shaped receiving portion 72 of the attachment 71 is rotated by 180 ° on the load-receiving element 23 is positioned. In this embodiment in Figure 3, in addition to the embodiment shown in Figure 2, for example, a telescoping arm 21 is shown in a retracted position, in which, for example, the first Tragarmstück 58 retracted in Tragarmkörper 52 and the second Tragarmstück 59 retracted in the first Tragarmstück 58. Alternatively, the load-bearing element 23 can be arranged directly on the support arm body 52 both in the embodiment according to FIG. 2 and in the embodiment according to FIG. 3, which is for example provided pivotably on the support 17 or can be provided directly on the support 17, in which case the load-receiving element 23 is preferably fixedly arranged on the carrier 17.
FIG. 4 shows an alternative embodiment of an attachment 71 for positioning and fixing an angular position to the support arm 21. In this embodiment, the positive locking 75 is deviating from the embodiment according to Figure 2 and Figure 3 is formed. This positive lock 75 for positioning the attachment 71 in an angular position to the support arm 21 comprises a toothed element 83, which cooperates with a blocking element 84. The toothed element 83 is positioned, for example, on an upper or lower side of the load-receiving element 23. The blocking element 84 engages, for example, in the U-shaped receiving portion 72 and is attached thereto. A view of the toothed element 83 and blocking element 84 is shown in isolation in Figure 5 in more detail. The toothed element 83 is preferably plate-shaped and, along an angular range for an adjustable angular position, has a toothing 83, which preferably comprises interspaces 86 which are arranged at regular intervals and which are formed by teeth 87. Adjacent to the toothing 85, a bore 88 is formed, which corresponds in diameter to the plug pin 73 or the bore 78 of the load-receiving element 23. The toothing 85 extends over an arc segment of at least 10 ° to preferably 180 °. At the end of each stop surfaces 89 are then formed, which limit the rotational position of the attachment 71 to the support arm 21.
With only one pin element 93 on the blocking element 84, the toothing 85 on the toothed element 83 can also be irregular.
Furthermore, for example, two fixing holes 91 are shown, through which the toothed element 83 can be fixed, for example, to an upper or lower side of the load-receiving element 23.
The blocking element 84 preferably has a tooth or a pin element 93, which is provided for positive engagement in one of the intermediate spaces 86. Adjacent to the toothed element 93 are support surfaces 94 which advantageously bear against end faces of the teeth 87 forming the intermediate space 86 in order to form an enlarged abutment and support surface for securing the angular position of the attachment 71 to the support arm 21. Furthermore, a holding section 96 is provided on the blocking element 84, which is preferably in the form of a clip, as shown in FIG. 5, which can be positioned according to FIG. 4 at the bottom of the U-shaped receiving sections 72 and is preferably fixable under pressure.
Figure 6 shows a schematic exploded view to illustrate a connection of the attachment 71 to the support arm 21. First, the attachment 71 is aligned in a predetermined angular position to the support arm 21. Subsequently, the attachment 71 is positioned to the support arm 21 so that the attachment 71 is fixed in the angular position by the positive locking 75. Subsequently, the plug pin 73 is advantageously inserted from above into the bores 81 and the bore 78 in order to secure the positive lock 75 and to fix the attachment 71 to the support arm 21.
It is preferably provided that on the attachment 71, a fork-shaped receiving portion 72 is formed and the load-receiving element 23 is plate-shaped, so that they can be used between the forked ends of the receiving portion 72. The distance of the forked ends or tabs of the receiving portion 72 corresponds at least to the thickness of the plate-shaped load-receiving element 23 and the thickness of the toothed element 83, so that a simple nesting is possible. Advantageously, the toothed element 83 with respect to the teeth 87 and the intermediate spaces 86 does not extend beyond an outer circumference of the load receiving element 23, which is arranged in the U-shaped receiving portion 72, so the one outer side of the load-receiving element 23 in the formation of the positive locking 75 at a Side surface of the pin member 93 rests and thus inadvertent release by an axial movement along the longitudinal axis 79 is prevented.
FIG. 7 shows an alternative embodiment of the positive lock 75 to FIG. This differs in that on the blocking element 84 adjacent to the pin member 93 further support surfaces 97 are formed, which follow the radius of the teeth 87 to form an enlarged support. In addition, can be done by the enlargement of the support surface 97, a restriction in the angular range for positioning of the attachment 71 to the support arm 21.
FIGS. 8 and 9 show in perspective an alternative embodiment of a hinge connection between an attachment 21 and a support arm 23 to FIG.
In contrast to the embodiment according to FIG. 4, the toothed element 83 is provided instead of on an underside of the load-receiving element 23 on an upper side of the load-receiving element 23 and correspondingly also the blocking element 84 on the attachment 71 , Between a bottom of the load-receiving element 23 and a tab of the receiving portion 72, a free space 100 is formed. This clearance 100 includes at least the thickness of the toothed element 83, so that when lifting the attachment 71 up the pin member 93 of the blocking element 84 is released from the gap 86 of the toothed element 83, so that the attachment 71 about the axis 79 pivotally and a new angular position to Support arm 21 or support is adjustable. By a subsequent lowering of the attachment 71 due to gravity, the positive locking 75 can be created by the pin member 93 in turn engages in a gap 96. The securing element 101 shown in FIGS. 8 and 9 can additionally be introduced, as will be described in more detail below, but this is not mandatory for the embodiment described above. It is only necessary that the free space 100 is configured in size such that the blocking element 84 is free relative to the toothed element 83 or vice versa. This embodiment has over the above-described embodiment in Figure 4 has the advantage that to change the angular position of the attachment 71 to the support arm 21, a complete release of the plug pin 73 from the bores 81 and 78 is not required. Rather, the removal of the securing element 101 and a relative movement of the attachment 71 along the longitudinal axis 78 and the load receiving element 23 to release the positive locking 75 is sufficient. Alternatively, in this embodiment, the locking pin 73 can be completely removed from the bores 81 and 78.
If the above-described embodiment is to be secured against unintentional changing of the set angular position, the securing element 101 can be used, which, for example, fills the free space 100, so that a relative movement between the attachment 71 and the support arm 21, in particular the connection piece 72, to the load-receiving element 23 Is blocked.
The fuse element 101 may be formed, for example, as a completely closed ring or as an open ring or the like. According to a first embodiment, it is provided that the retaining ring 101 is then detachable from the locking pin 73, as soon as the locking pin 73 is moved at least partially along the longitudinal axis 79, so that a peripheral surface of the plug pin 73 is led out relative to the securing element 101, so that the Securing element 101 can be removed freely from the intermediate space between the tabs of the connecting piece 72. Subsequently, the locking pin 73 is lowered again, so that subsequently the load-receiving element 23 and the attachment 71 are movable relative to each other along the longitudinal axis 79 and 82, respectively.
An alternative embodiment may provide that the fuse element 101 inserted plug-in pin 73 from the outside into the space or space 100 plugged or externally plugged onto the plug pin 73 or plugged into the socket pin 73 to a relative movement between the load-receiving element 23 and the cultivation 71 to lock.
For connection of the attachment 71 to the support arm 21 may also be provided in this embodiment, that the attachment 71 is aligned in the angular position to the support arm 21 and then the bores 81 of the attachment 71 are aligned with the bore 78 of the load-receiving element 23, wherein during alignment positive lock 75 is formed. Subsequently, the locking pin 73 is inserted, in particular from above and, if desired, the securing element 101 inserted into the free space 100, and the locking pin 73 passed through the securing element 101 and inserted into the lower bore 81. Alternatively, it can also be provided that the holes 81 of the attachment 71 are aligned with the bore 79, without a positive lock 75 is formed. Subsequently, the locking pin 73 is inserted. Subsequently, if desired, there is a relative movement between the attachment 71 and the support arm 21 to form the positive locking 75 to subsequently introduce the securing element 101, wherein the locking pin 73 is again partially moved up to the securing element 101 for passing the Positioning pin 73 or the securing element 101 is plugged or set or inserted on the locking pin 73.
The above-described embodiments based on the arrangement of an attachment 71 on a support arm 21 apply analogously for the connection of an attachment 71 to the carrier 17. Further, it is understood that the fork-shaped receiving portion 72 instead of the attachment 71 on the support arm 21 or support 17 is provided may be and the load-receiving element 23 is provided on the attachment 71.
The attachment 71 is used for load picking and acts on the load or the vehicle or the like. This attachment 71 may be a support arm which is connected to the carrier. It may be an extension, which may be equipped, for example, at the free end with a rubber plate or the like. It may be a wheel mounting plate or a wheel fork or a wheel gripper.
All of the features and embodiments described above are essential to the invention and can be combined as desired.

Claims

Lifting device for lifting and lowering vehicles, loads or the like with a support (17) movable up and down, on which a load-receiving means (18) is provided, wherein the load-receiving means (18) at least one support (17) or support arm (21) , characterized in that between the carrier (17) or the support arm (21) and an attachment (71) a hinge connection (24) is formed, - in which after aligning the attachment (71) to the carrier (17) or support arm (21) in an angular position relative to each other and a subsequent positioning of a respective longitudinal axis (79) of at least one bore (78) on the carrier (17) or support arm (21) with a longitudinal axis (82) of at least one bore (81) on the attachment ( 71) a positive locking (75) of the attachment (71) to the support (17) or support arm (21) for maintaining the angular position is formed and the Täger (17) or the support arm (21) and the attachment (71) by a in the holes (78, 81) insertable pin (73) are fixed to each other, or in which after positioning of a respective longitudinal axis (79) of at least one bore (78) of the carrier (17) or the support arm (21) and a longitudinal axis (82) of at least one bore (81) to the attachment (71) to each other, these by inserting a plug pin (73) are rotatably mounted to each other and the attachment (71) and the carrier (17) or the support arm (21) along this longitudinal axis (79, 82) relative to each other are, in an adjusted position, the attachment (71) freely pivotable to the carrier (17) or support arm (21) and in a working position after an axial movement between the attachment (71) and the carrier (17) or support arm (21) is a positive Lock (75) is formed, by which fixes the set angular position of the attachment (71) to the carrier (17) or support arm (21).
Lifting device according to claim 1, characterized in that the positive lock (75) comprises a blocking element (84) with at least one tooth or a pin element (93) and a toothed element (83) into which the pin element (93) in a gap ( 86) between two teeth (87) of the toothed element (83) engages positively.
Lifting device according to claim 2, characterized in that the blocking element (84) has a holding section (96), in particular a clip-shaped holding section (96), on which the at least one pin element (93) is preferably integrally formed.
Lifting device according to claim 2, characterized in that the toothed element (83) along an angular range for an adjustable angular position of the attachment (71) to the support (17) or support arm (21) an arc segment with teeth (87) and interspaces (86) arranged therebetween. having.
Lifting device according to one of claims 2 to 4, characterized in that the toothed element (83) is plate-shaped and adjacent to the toothed element (83) has a bore (88) is formed, which is provided for receiving the plug pin (73).
Lifting device according to claim 1, characterized in that the positive locking (75) comprises two or more mutually arranged at an angle end faces (76) on the support (17), the support arm (21) or attachment (71), which at least one Abutment surface (80) on the support (17), support arm (21) or attachment (71) in adjustable angular positions abut one another, preferably wherein the end faces (76) in a parallel plane and radially to Längsache (79) of the bore (78, 81) are aligned.
Lifting device according to claim 1, characterized in that the at least one bore (78, 81) on the support (17), support arm (21) or attachment (71) has an internal toothing and the locking pin (73) is provided with external teeth and when inserting of the plug pin (73) into the bore (81, 78) a positive locking (75) is formed.
Lifting device according to claim 1, characterized in that the attachment (71) a fork-shaped connection piece (72) and the support (17) or the support arm (21) a plate-shaped load-receiving element (23) each having at least one bore (78, 81) for the Locking pin (73).
Lifting device according to claim 8, characterized in that a gap between the fork-shaped connecting piece (72) at least the thickness of the load-receiving element (23) and a toothed element (83) or blocking element (84) corresponds, and preferably a thickness of the load-receiving element (23) and the at least twice the thickness of the toothed element (83) or blocking element (84) corresponds.
Lifting device according to claim 1, characterized in that the working position of the attachment (71) to the carrier (17) or support arm (21) is secured by a releasable securing element (101) engaging the locking pin (73).
Lifting device according to claim 10, characterized in that the securing element (101) is designed as a detachable, in particular aufsteckbares, fastener, as a snap ring or mounting bracket, which auf auf or in the locking pin (73) or can be inserted or the locking pin (73) in the securing element (101) can be inserted and preferably can be arranged between the plate-shaped load-receiving element (23) and the connecting piece (72).
Lifting device according to claim 11, characterized in that the securing element (101) is provided as a spacer element for securing the positive locking (75), which is released after a partial removal or lifting of the pivot pin (73).
Lifting device according to one of the preceding claims, characterized in that the locking pin (73) after the positioning of the support (17) or support arm (21) to the attachment (71) from above into the bores (78, 81) is insertable and the articulated connection ( 24) is formed.