Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
  • B60S9/14—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for both lifting and manoeuvring
  • B60S9/205—Power driven manoeuvring fittings, e.g. reciprocably driven steppers or rotatably driven cams

Definitions

• the invention relates to a lifting device with a mechanical, pneumatic, hydraulic or electric drive for four-wheel motor vehicles.
• the invention is therefore based on the object of creating a device that eliminates the defects mentioned and increases the mobile mobility of passenger cars in a confined space. Furthermore, the device should also be uncomplicated for the non-specialist, reliable for the driver and finally the device should be inexpensive to install in new and old vehicles.
• the invention is based on a lifting device with a mechanical, pneumatic, hydraulic or electric drive for four-wheel motor vehicles, the supporting moment of the lifting device being applied outside the center of gravity of the vehicle in such a way that when the lifting device supported against the roadway is actuated, two Vehicle wheels are lifted off the road.
• the invention consists in turning the vehicle at the point where the nub device is firmly attached to the lower load-bearing floor or frame of the vehicle, applying the respective supporting moment outside the center of mass of the vehicle in such a way that when the lifting device is actuated, the other two vehicle wheels are partially relieved and at least one of the partially relieved wheels is a driven wheel. With the driven wheel, it is then possible to rotate the motor vehicle on the spot.
• the two front wheels or the left front and left rear wheels or the right front and right rear wheels can be partially relieved.
• the lifting device when the lifting device is actuated, it is loaded with 60% to 80% of the vehicle weight and the partially relieved wheels with the residual load.
• the respective wheel suspension of the wheels lifted off the roadway is stroke-limited by a ratchet device with a mechanical, pneumatic, hydraulic or electric drive in such a way that only a small part of the wheel spring stroke becomes effective and that the ratchet device is automatically engaged and disengaged by the lifting device intervention is brought.
• the lifting device preferably has a support plate with a low-friction bearing turntable to keep the frictional torque small when turning the vehicle around the axis of rotation.
• the lifting device In the extended state, the lifting device is supported by a strut against the vehicle floor.
• the lifting device is advantageously locked automatically and can only be unlocked by turning the front wheels fully to the left or right.
• the lifting device can be locked or unlocked using limit switches on the steering linkage.
• a ratchet device can be provided for all wheels.
• FIG. 2 shows a top view of the lifting device without a drive motor from the direction of arrow II in FIG. 3,
• FIG. 3 shows a section through the lifting device without a drive motor along line III-III of FIG. 2,
• FIG. 4 shows a section like FIG. 3 through the lifting device with drive motor
• Fig. 5 shows the view of the vehicle floor with attached lifting device
• FIG. 6 shows a wheel suspension with a ratchet device for stroke limitation.
• FIG. 1 shows the view of the vehicle floor of a motor vehicle 1. If the force acting on the drive wheels 61, 62 of a motor vehicle 1, multiplied by the friction factor of the tires to the road, is smaller than an opposing restoring force in the form of braking or adhesion torques, then the motor vehicle 1 cannot move.
• the invention makes use of this technical fact by supporting the vehicle 1 with 60% to 80% of the vehicle weight against the roadway by a lifting device 4 mounted on the vehicle floor and described in FIGS.
• the point of application 2 of the lifting device 4 is preferably behind the vehicle's center of mass 3.
• the lifting device 4 In vehicles that are driven via the rear wheels 71, 72, the lifting device 4 is arranged next to the center of mass 3 parallel to the longitudinal axis of the vehicle at the support points 51 or 52. As a result, when the lifting device 4 is extended, the left pair of wheels 61, 71 or the right pair of wheels 62, 72 in a longitudinally parallel arrangement is partially or fully relieved. To drive a turn of the vehicle 1 about the pivot point of the lifting device 4, it is necessary here to lock the differential in the rear-wheel drive. This is expediently also done automatically by the lifting device 4, in that a mechanism or pneumatic, hydraulic or electric servomotors are controlled.
• FIG. 2 shows a plan view of the lifting device 4 from the direction of the arrow II in FIG. 3 and in FIG. 3 a section through the lifting device 4 along the line
• the lifting device 4 is in the retracted state.
• the lifting device 4 consists of two longitudinal beams 10, 11, two with the longitudinal beams 10, 11 firmly connected cross members 12, 13, two scissor arm pairs 81, 82; 91, 92 each provided at its outer ends with rotatable rollers 151, 152; 161, 162 are suspended within the U-profile of the crossbeams 12, 13 such that they can be rolled and pivoted, while the ends of the pairs of scissor arms 81, 82; 91, 92 are articulated to a disk plate 21.
• a turntable 22 is mounted pointing vertically downwards.
• the swivel arms 81, 91 are lift-actuated in that a hydraulic, pneumatic or electric motor 24, driven by the battery of the vehicle 1, sets a threaded spindle 23 with a right/left-hand thread in rotary motion and so via the swivel nuts 341, 342 the outer roller bearings 151, 152; 161, 162 the pairs of scissor arms 81, 82; 91, 92 inwardly, resulting in a scissor movement of the scissor arm pairs 81, 82; 91, 92 and thus to the vertical stroke of the platen 21 with the turntable 22.
• the lifting device 4 can be moved back into the rest position according to FIG. 3.
• the threaded spindle 23 is provided with a square 35,
• the front drive wheels 61, 62 must be steered fully to the left or fully to the right, depending on the desired pivoting direction. Only then do limit switches on the steering linkage (not shown in the drawings) release the mechanical, pneumatic, hydraulic or electrical actuation of the lifting device 4 for lifting the vehicle 1 . This lock is necessary so that the lifting device 4 remains locked during normal driving and cannot be extended. When the lifting device 4 is actuated into a position according to FIG.
• FIG. 6 shows a wheel suspension with a ratchet device 26 for limiting the stroke.
• the ratchet cable 201, 202 is firmly connected to a stronger tension spring 33 and moreover to the ratchet lever 26.
• the pulling movement of the ratchet cable 201, 202 moves the ratchet lever 26, which is pivotably mounted on the vehicle floor, into a latched position according to FIG. This means that the ratchet lever 26 latches the wheel suspension or the rear-wheel rigid axle 34, shown in simplified form in FIG.
• the partially relieved front wheels 61, 62 only remain in contact with the road with the small weight proportion of 40% to 20%, while the rear wheels 71, 72 lift off the road after only a small load stroke due to the spring stroke lock by limiting the effective stroke of the wheel springs 31 by the pawl 32 according to FIG. If the vehicle engine is now driven and the front wheels 61, 62 are driven by engaging a forward gear, the vehicle 1 attempts to move accordingly in the direction of the fully engaged steering.
• the front wheels 61, 62 spin, but at the same time a torque component is generated which is sufficient to turn the vehicle 1 about the lifting load point of the turntable 22 . It is thus possible to bring the vehicle 1 into any direction of travel when it is stationary at any time.
• FIG. 5 shows the arrangement of a complete lifting device 4 with a view of the vehicle floor from below.
• This is preferably a retrofit kit, in which the longitudinal beams 10, 11 are attached to the respective frame reinforcements 25, which are provided for coupling the accessory car jack.
• struts 30 are provided, as shown in FIGS connect it to the disk plate 21 in a lifting manner.
• the subject of the invention offers further advantages, for example as an additional parking brake and at the same time as an anti-theft device if, when the vehicle is parked, the lifting device 4 is extended so far that the turntable 22 is braced against the roadway, but the wheels 61, 62, 71, 72 are also in adhesive contact with stay in the lane.
• the lifting device 4 shown in FIGS. 2 to 5, which can also be retrofitted, can be significantly reduced in terms of materials and thus costs if the corresponding reinforcements on the vehicle floor or frame are taken into account from the outset in new vehicles.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6299200

Family Applications (1)

Country Status (5)

Families Citing this family (16)

Family Cites Families (15)

• 1986
  • 1986-04-22 DE DE19863613495 patent/DE3613495A1/de active Granted
• 1987
  • 1987-04-10 JP JP62502412A patent/JPH01502419A/ja active Pending
  • 1987-04-10 US US07/272,832 patent/US4955450A/en not_active Expired - Fee Related
  • 1987-04-10 WO PCT/EP1987/000196 patent/WO1987006548A1/de not_active Application Discontinuation
  • 1987-04-10 EP EP87902491A patent/EP0306487A1/de not_active Ceased

Non-Patent Citations (1)

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