摘要:
In a driving arrangement for belt tensioners, a working chamber (32) is formed in a housing being assembled of several parts (10, 16), as well as an accommodation space (20) for a gas generator capsule (22), said space being in fluid connection with said chamber. The gas generator capsule (22) is encased by a sleeve (24) which is inserted in sealing contact between said parts (10, 16) of the housing in its accommodation space (20). A pre-chamber (26) is formed in the sleeve (24) opposite the bottom of said gas generator capsule (22).
摘要:
A rotary drive apparatus for a belt tensioner comprises a casing (10) in which a cylinder space (18) is formed, a generally circular disk-shaped rotor (14) mounted eccentrically therein having vanes (26) accommodated in radial slots (24) and a compressed gas source for pressurizing the chambers formed between the vanes, the rotor and the wall of the casing. The chambers are sealed off both with respect to each other and to the casing (10, 12) by a sealing system (30) on the rotor (14). The rotor (14) is mounted on said casing (10, 12) and is rotatable with respect to a shaft (16) and carries at least one pivotally mounted clutch pawl (32) which is engagingly positionable in a clutch toothing (34) on the circumference of said shaft (16).
摘要:
A vehicle steering wheel with an integrated gas bag restraining system comprises a plastic foam encased steering wheel body, whose hub part (18) is designed to receive a folded up gas bag (24). A cover (30) for the gas bag (24) is an integral component of the plastic foam case, in whose opening a housing body (40) is able to be inserted, wherein a pyrotechnic propellant charge and a fuse are arranged. The housing body (40) is secured on the one hand to the hub part (18) and on the other hand to the steering shaft.
摘要:
A drive device for a belt pretensioner is of the lamella motor type and its rotor (16) can be directly joined to the belt drum of a belt retractor. In the resting state the lamellas (20) are retracted into radial slots (18) of the rotor (16) so that they do not come into contact with the housing wall. At the radially inner end thereof the lamellas possess a larger pressurized area than at the outer end and on activation of the gas generator by the pressure built up by a blowout patch (54) at the outlet (30) they are thrust radially outward into sealing engagement with the wall of the housing (12).
摘要:
A belt pretensioner for vehicle safety belt systems is provided with a drive unit which comprises a pyrotechnic gas generator (12) and a piston and cylinder unit (16, 20). The piston (20) is arranged at a first end (161) of the cylinder (16) and is connected with a cable (22). By means of the gas pressure produced by the gas generator (12) the piston is accelerated towards the second, tapered end (162) of the cylinder (16). A sleeve-like insert (18) is arranged in the tapered cylinder end. The insert (18) has ribs and grooves alternating in the peripheral direction to offer sufficient room for plastic deformation.
摘要:
The invention relates to a belt pretensioner for vehicle safety belt systems comprising a pyrotechnic gas generator (12) and a piston and cylinder unit (16, 20) mounted in a housing block (14). The piston (20) of the piston and cylinder unit (16, 20) is arranged on a first end (161) of the cylinder (16) as well as being connected with a cable (22) and it is accelerated towards the second end (162), which has a constriction, of the cylinder (16) by the gas pressure produced by the gas generator (12). The piston and cylinder unit (16, 20) with the housing block (14) and the gas generator (12) mounted therein constitute a pivotally bearinged vehicle-sensitive inertial mass. In accordance with the invention a deformable member (46) is arranged on the piston (20) and on acceleration of the piston (20) is entrained towards the second end (162) of the cylinder (16) by the piston (20) and on impingement on the wall parts of the cylinder (16) constituting the constriction is plastically deformed.
摘要:
In a driver restraining gas bag system for vehicles a compressed gas container is arranged clear of the steering wheel and connected by way of a gas duct with an inflation opening of the bag for filling the gas bag arranged on the steering wheel hub. At its entry into the steering wheel the gas duct means is sealed off by an annular sealing gap between a first gap defining surface formed on the steering wheel hub and an oppositely arranged second gap defining surface on a wall, which is stationary in relation to the vehicle's bodywork, of the gas duct means without contact between these gap defining surfaces.
摘要:
In a vehicle safety belt system a gripping mechanism (16) is arranged at a webbing section (10) extending between a deflection fitting (12) and the belt retractor (14). In the rest condition the webbing is led freely between the oppositely disposed clamping elements of the gripping mechanism (16). The gripping mechanism (16) is connected via a pulling cable (38) to a pyrotechnic or mechanical belt tightener drive. The clamping elements are biased by springs against the webbing whereby a uniform contact on the latter is ensured.
摘要:
The tightening means for safety belt restraining systems is equipped with a pyrotechnical piston/cylinder tightening drive which is inserted via fitting parts engaging the piston on the one hand and the cylinder on the other hand into the force flow path of the safety belt system. The cylinder is formed in a cylinder block which is guided displaceably parallel to the axis of the cylinder on a bodywork-fixed or vehicle-seat-fixed guide member. The piston is formed at the one end of a shear-stressable piston rod and in the readiness position of the tightening means is inserted with the piston rod into the cylinder. At its other end the piston rod is supported at the guide part. The release is by means of a vehicle-sensitive mechanical trigger mechanism. Instead of a return blocking mechanism is return brake is provided which reduces the stress peaks in the belt system.
摘要:
The drive device of lightweight construction for restraining systems in motor vehicles, in particular safety-belt tightening means, comprises a pyrotechnical gas generator, the gases of which act on a working chamber. The working chamber comprises an outwardly leading relief path which is sealed by a closure element of a material which at a temperature which lies above the operating temperature range of the gas generator but which at the most is equal to the self-igniting temperature of the gas generator softens at least to such an extent that the closure element on ignition of the gas generator frees the relief path but which at temperatures beneath the operating temperature range of the gas generator has a mechanical strength such that the relief path remains sealed by the closure element under the gas action.