SU574352A1 - Energy-absorbing steering column for vehicles - Google Patents

Description

one

This invention relates to a motor vehicle, in particular, to energy absorbing devices of safe steering columns.

The energy-absorbing, safety-safe steering wheel is known, consisting of rigidly connected with the telescopically displaceable parts of the steering control of the sleeve and the shaft of non-circular shape (in cross section), covered with the tensioned sleeve, as well as with longitudinal slotted through the ends through slots 1.

The disadvantage of such an energy absorbing steering column is the design complexity.

Also known is the energy absorbing steering column of the vehicle, made in the form of a coupling with holes and a longitudinal groove connecting the curved upper and lower parts of the steering shaft, the ends of which are not circular and parallel to its axis 2.

The disadvantage of this design is that when telling the curved parts of the steering shaft around the axis, perpendicular to the plane of the groove and to the spline holes of the coupling, a torque prevents the device from triggering, besides depending on the position of the tooth of the slit joint relative to the through groove The clutch compression load due to the clamping bolts is uneven.

The purpose of the invention is to reduce the torque that occurs during the telescoping of parts of the steering shaft.

For this, the coupling is made of two halves split in the axis axis of the shafts, forming guide rails for each part

shaft axially displaced toward telescoping.

FIG. 1 shows an energy absorbing device, a general view; in fig. 2 is a section along A-A in FIG. one; in fig. 3 - section BB on

FIG. one.

The curved upper 1 and lower 2 parts of the steering shaft, the ends of which are parallel to its axis, are connected by two curved plates 3, forming a clutch with guides of a non-circular (corresponding to the profile of the parts of the steering shaft) shape with a longitudinal through groove. Guide sleeves are axially displaced relative to each other. Nersd compression of the ends of the parts of the steering shaft

in the clutch, they should be covered with film 4, for example polyethylene, acting as a lubricant, which will compress the ends of the shaft with greater force for more reliable transmission of torque from the steering wheel and increase the stability of the axial shear forces at the nodes. To ease the weight of the coupling (while maintaining rigidity when crimping the ends of parts of the steering shaft), it has stiffening ribs (the cross section of the latter is shown in Fig. 3). Perpendicular to the coupling groove there are through holes for clamping bolts 5 with spring washer 6, nut 7, which is counter-clamped with washer 8. The device operates in the next nm way. After hitting the steering shaft, parts 1 and 2, overcoming the initial resistance caused by the installed tightening force of the bolts 5, begin telescoping, preventing the steering shaft from penetrating into the car’s interior when deforming the center part of the car and absorbing energy from the driver’s body pushing against the steering wheel. . The invention The energy absorbing steering column of a vehicle is made in the form of a coupling with holes and a longitudinal groove connecting the ejected upper and lower parts of the steering shaft, the ends of which are non-circular and parallel to its axis, which is In order to reduce the torque that appears during telescoping of the steering shaft parts, the coupling is made of two halves split in the axis axis of the shafts, forming guide rails for each shaft part shifted in axial direction towards the telescopes no. Sources of information taken into consideration and examination 1.US Patent N ° 3434368, cl. 74-493 1972. 2.Avtorskoe certificate of the USSR No. 455029, cl. In 62D 1/18, 1972.

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