Abstract
The invention relates to an adjusting device 2 for vehicles 1, in particular electric wheel chairs or rehabilitation vehicles, recumbent systems and nursing beds, comprising at least one mounting plate 3 and one support plate 4 with a lifting device 5 comprising at least two scissor mountings 20, which are arranged at the longitudinal side edge or in a corner region of the mounting 3 or support plate 4 each and are vertically adjustable by a driving means, wherein each scissor mounting 20 is formed as double scissors and includes a first, lower scissor element 21 and a second, upper scissor element 22 which are connected to each other at one end via a common rotation pin, and the lower scissor element 21 is connected at the other end to the mounting plate 3, and the upper scissor element 22 is connected at the other end to the support plate 4 via fastening means. In order to achieve a diagonal tilting of the adjusting device, according to the invention, the at least one fastening means consists of a bracket 35 connected to the support plate 4 and a fastening unit 30 axially movable with respect to the bracket 35 at which the ends of the upper scissor elements 22 of at least one scissor mounting 20 are hinged. By means of the bracket 35 and the fastening unit 30, an axial moveability in the longitudinal direction of the vehicle seat 13 is permitted so that no deadlock can occur even in extreme positions of the scissor mountings 20.
Claims
1. Adjusting device (2) for vehicles (1), in particular electric wheel chairs or rehabilitation vehicles, recumbent systems and nursing beds, comprising at least one mounting plate (3) and one support plate (4) with a lifting device (5), which comprises at least two scissor mountings (20) which are arranged at the longitudinal side edge or in a corner region of the mounting (3) or support plate (4) each and are vertically adjustable by a driving means, wherein each scissor mounting (20) is formed as double scissors and includes a first, lower scissor element (21) and a second, upper scissor element (22) which are connected to each other at one end via a common rotation pin, and the lower scissor element (21) is connected at the other end to the mounting plate (3), and the upper scissor element (22) is connected at the other end to the support plate (4) via fastening means, characterized in that at least one fastening means consists of a bracket (35) connected to the support plate (4) and a fastening unit (30) axially movable with respect to the bracket (35) at which the ends of the upper scissor elements (22) of at least one scissor mounting (20) are hinged.
2. Adjusting device (2) according to claim 1, characterized in that a bracket (35) with a fastening unit (30) is associated with the upper scissor elements (22) of at least one longitudinal side.
3. Adjusting device (2) according to claim 1, characterized in that the fastening unit (30) is shiftably mounted with respect to the bracket (35) in the direction of travel of the vehicle (1).
4. Adjusting device (2) according to claim 1, characterized in that the bracket (35) is directly connected to the support plate (4), preferably screwed to it, and includes a bore in which a guide rod (34) of the fastening unit (30) is received.
5. Adjusting device (2) according to claim 1, characterized in that the fastening unit (30) includes a base (31) with two parallel legs (32, 33) in which the bores are present to receive the guide rod (34).
6. Adjusting device (2) according to claim 1. characterized in that each scissor mounting (20) consists of two double scissors arranged in parallel with respect to each other.
7. Adjusting device (2) according to claim 5, characterized in that the two upper scissor elements (22) of one double scissor are rotationally movably hinged to the base (31) of the fastening unit (30), wherein each upper scissor element (22) has its own pivot point which coincides with the pivot point of the second scissor element (22) of the double scissors arranged in parallel.
8. Adjusting device (2) according to claim 1, characterized in that the fastening means, consisting of the bracket (35) and the fastening unit (30), is arranged at the longitudinal side of the adjusting device (2) which also provides a transverse shifting of the upper scissor elements (22), and/or that the fastening means, consisting of the bracket (35) and the fastening unit (30), is arranged at the longitudinal side of the adjusting device (2) which is opposite the transverse shifting.
9. Adjusting device (2) according to claim 1, characterized in that the scissor elements (21, 22) of one scissor mounting (20) are arranged in one offset plane each such that there is no contact.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In the drawings:
[0031] FIG. 1 shows, in a perspective view, a vehicle with an adjusting device for an existing seat,
[0032] FIG. 2 shows, in a side view, the vehicle known from FIG. 1,
[0033] FIG. 3 shows, in a side view, the vehicle according to FIG. 1 with a seating surface shifted to the front,
[0034] FIG. 4 shows, in a perspective view, the vehicle with a seating surface tilted backwards,
[0035] FIG. 5 shows, in a side view, a vehicle with an adjusting device and a longitudinal shiftability with respect to the mounting plate,
[0036] FIG. 6 shows, in a side view, the vehicle with the adjusting device in a position in which the mounting plate has been driven upwards to the maximum height, and
[0037] FIG. 7 shows, in a side view, the vehicle with an adjusting device with a diagonal tilting.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0038] FIG. 1 shows, in a perspective view, a vehicle 1 with an adjusting device 2, the vehicle being in this case, for example, an electric wheel chair in a very stable design. The adjusting device 2 consists of a mounting plate 3 and a support plate 4 between which the lifting device 5 is arranged. Underneath the mounting plate 3, there is the vehicle substructure 6 which, in this case, consists of a box-shaped housing 7 for accommodating the electronic system and batteries. At the housing 7. two large drive wheels 8 are fixed to motors via a shaft. The drive wheels 8 are in this case designed in a non-steerable manner, however, they are steered indirectly via the two independent motors which may be driven at different speeds. Two further, smaller wheels 9 are mounted in a fork-shaped retainer 10 by means of a rotation pin, the two wheels 9 being connected to each other via an oscillating axle 11 and the oscillating axle 11 being screwed to the box-shaped housing 7. The shown vehicle 1 is thus steered by the drive wheels 8, wherein the operator controls required for this may be integrated, for example, in the arm rests 12.
[0039] There are a seating surface 13 and a backrest 14 on the support plate 4, wherein the backrest 14 can be adjusted via an adjusting unit 15 with respect to its inclination. The backrest 14 is to this end mounted via a pivot point 16 in a pivoting manner. The arm rests 12 are located on both sides of the seating surface 13. The stable design of the vehicle 1 exhibits here already that this type of vehicles comprises a cross-country mobility and is moreover suited for heavyweight persons. Between the mounting plate 3 and the support plate 4, there is the lifting device 5 which consists, in the shown embodiment, of four scissor mountings 20 arranged in the corner regions. The construction of the scissor mountings 20 will become apparent from the following figures.
[0040] FIG. 2 shows, in a side view, the vehicle 1 known from FIG. 1 with the adjusting device 2 which is arranged between the mounting plate 3 and the support plate 4. This view reveals that the drive wheels 8 are each driven by a motor which is connected to the housing 7. The other, rear wheels 9 are fastened to a bracket 17 attached to the housing 7 via an oscillating axle 11.
[0041] FIG. 3 shows, in a side view, the vehicle 1 according to FIG. 1, wherein, compared to FIG. 2, the seating surface 13 with the backrest 14 is additionally shifted to the front in the direction of the front drive wheels 8. The adjustment of the sitting position is in this case effected, for example, via a linear drive which is located underneath the mounting plate 3.
[0042] FIG. 4 shows, in a perspective rear view, the vehicle 1 according to FIG. 1 with the lower vehicle's substructure 6 and the seating surface 13 with the backrest 14, wherein the support plate 4 has been lifted with respect to the mounting plate 3 in the front region with the aid of the lifting device 5. The lifting device 5 consists of altogether four scissor mountings 20 which each consist of four lower scissor elements 21 in double pairs and four upper scissor elements 22 in double pairs. Double pairs in this case means two individual scissor elements 21 arranged next to each other and behind each other. The lower scissor elements 21 are connected to the mounting plate 3 in two lower pivot points 23, and at the other end to the second scissor elements 22 in two pivot points 24. The second scissor elements 22 are connected to the support plate 4 in two upper pivot points 25. The connection of the scissor elements 21 and 22 is accomplished in the pivot point 24 via two rotation pins 27, 28, wherein two lower scissor elements 21 in double pairs each can be pivoted to the front and are connected to a rotation pin 27, while the two other scissor elements 21 in double pairs can be pivoted to the back and are connected to a further rotation pin 28. The upper scissor elements 22 are also connected to the pivot point 24 to the first rotation pin 27, so that these can be pivoted to the front, while the two other scissor elements 22 can be pivoted to the back and are connected to the other rotation pin 28. Both rotation pins 27, 28 are equipped with a spindle mount in the central region into which a threaded spindle 26 is screwed. The threaded spindle 26 has, at its both ends, opposed threaded sections, one being a clockwise thread and the other one a counterclockwise thread, so that in a rotation of the threaded spindle 26, the two rotation pins 27, 28 are moved away from each other or towards each other in the pivot point 24. It is obvious here from FIG. 4, that the scissor mountings 20 in the front region of the vehicle 1 are extended to such an extent that the seat surface 13 is lifted at the front. The two rotation pins 27, 28 of the pivot point 24 are closely arranged next to each other, so that the lower scissor elements 21 are nearly in a vertical position. The upper scissor elements 22 are slightly inclined rearwards. In contrast, the rear scissor mountings 20 are shown in their lowest position in which the two rotation pins 27, 28 of the scissor mountings 20 are arranged at a great distance. Due to the seat inclination, which corresponds to the inclination of the support plate 4, the upper scissor elements 22 of the rear scissor mountings 20 are pivoted and adapt to the position of the support plate 4. This position can also be taken from FIG. 5 below.
[0043] FIG. 5 shows, in a side view, a slightly modified vehicle 1′ with an adjusting device 2. The vehicle 1′ consists of a vehicle substructure 6 with a housing 7 and a bracket 18 which is provided for receiving the steerable rear wheel 9. The front wheels 8, however, are not steerable. A mounting plate 3 is located on the vehicle substructure 6 and is provided for mounting the adjusting device 2. The adjusting device 2 consists of the lifting devices 5, i. e. the corresponding drive motors which drive the spindles 26. The spindles 26 here have two opposed threaded portions so that the scissor mountings 20, which are embodied as double scissor mountings, can be vertically traversed. The scissor mountings 20 here each consist of a lower scissor element 21 and an upper scissor element 22. The scissor mountings 20 are each arranged in double and are located one behind the other, but due to the length of the individual scissor elements 21, 22, it is ensured that an adjustment is possible independent of the adjacent scissor mountings 20. The lower scissor elements 21 are connected to the mounting plate in a non-depicted pivot point and have a rotation pin 27, 28 at the other end which forms the connection to the upper scissor element 22. Both the lower scissor elements 21 and the upper scissor elements 22 are here each connected to each other in pairs and can be vertically traversed via the drive motor via a threaded bracket which is reciprocated on the threaded spindle.
[0044] The upper scissor elements 22 are connected to a fastening unit 30 in a pivot point 25 in the shown embodiment, that is, the upper scissor elements 20 each in one single pivot point 25. The fastening unit 30 consists of a base 31 which includes two parallel legs 32, 33 on the end side. Between the legs 32, 33, a guide rod 34 is arranged which is fixed between the legs 32, 33 in a torque-proof manner. The guide rod 34 here rests in a bore of a bracket 35 which is firmly screwed to the mounting plate or otherwise fastened. By means of the fastening unit 30 and the bracket 35, there is a shiftability of the fastening unit 30 with respect to the mounting plate 4, so that a compensation movement is possible in the adjustment of individual scissor mountings 20. This compensation movement prevents a deadlock of the scissor mountings 20 even in extreme positions, for example, in a diagonal tilting of the support plate 4. FIG. 5 shows the support plate 4 in a slightly elevated position without there being any tilting.
[0045] FIG. 6 shows the vehicle 1′ with the adjusting device 2 according to the structure of FIG. 5 in a side view. In this case, the support plate 4 is represented in an elevated position which illustrates that by means of the lifting device 5, a height adjustment of the scissor mountings 20 is performed, in this case a uniform height adjustment, so that the support plate 4 is lifted parallel to the wheels 8, 9.
[0046] FIG. 7 shows the vehicle 1′ with the adjusting device 2 in a position of the mounting plate 4 showing a diagonal tilting. By means of the differently lifted scissor mountings 20, the support plate 4 is inclined both to the front and to the side, so that a diagonal tilting is provided. For the scissor mountings 20 not to block each other, in this case, a fastening means consisting of a fastening unit 30 and a bracket 35 is used, wherein the bracket 35, firmly connected to the support plate 4, receives the guide rod 34 which can move in the direction of travel, thus in the axial direction with respect to the bracket 35. Thus, the fastening unit 30 is shiftably mounted in a limited, but sufficient region, so that a deadlock of the scissor mountings 20 is prevented. The fastening unit 30 with the bracket 35 represents an additional structural unit which permits the shiftability in the longitudinal direction. The fastening unit 30 with the bracket 35 here only has to be provided on one longitudinal side of the mounting plate, while the opposite longitudinal side provides an axially stationary linkage of the upper scissor elements 22 to the support plate 4. On the opposite longitudinal side, only a pivoting moveability is required. It is ensured in this manner that the support plate 4 is fixed on one side, and an unintentional movement in the longitudinal direction is not possible. The longitudinal moveability by means of the fastening unit 30 and the bracket 35 is here preferably provided on the longitudinal side of the support plate 4, where a transverse shifting according to prior art is also provided. By these two shifting options, in any position of the scissor mountings 20, there is a moveability which prevents a deadlock of the scissor mountings 20 in case of a diagonal tilting.
LIST OF REFERENCE NUMERALS
[0047] 1, 1′ vehicle
[0048] 2 adjusting device
[0049] 3 mounting plate
[0050] 4 support plate
[0051] 5 lifting device
[0052] 6 vehicle's substructure
[0053] 7 housing
[0054] 8 drive wheel/rear wheel
[0055] 8 front wheel
[0056] 9 rear wheel
[0057] 10 retainer
[0058] 11 oscillating axle
[0059] 12 arm rest
[0060] 13 seating surface
[0061] 14 backrest
[0062] 15 adjusting device
[0063] 16 pivot point
[0064] 17 bracket
[0065] 20 scissor mounting
[0066] 21 scissor element
[0067] 22 scissor element
[0068] 23 pivot point
[0069] 24 pivot point
[0070] 25 pivot point
[0071] 26 threaded spindle
[0072] 27 rotation pin
[0073] 28 rotation pin
[0074] 30 fastening unit
[0075] 31 base
[0076] 32 leg
[0077] 33 leg
[0078] 34 guide rod
[0079] 35 bracket
