192 clutches and power-stop control – Transmission and brake – Torque-responsive brake
Patent
1999-06-09
2000-08-01
Marmor, Charles A
192 clutches and power-stop control
Transmission and brake
Torque-responsive brake
192 12BA, 192 17D, F16D 6702
Patent
active
060953128
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to an infinitely operating two-way adjusting device according to the preamble of claim 1.
From DE 36 08 858 A1 an adjustable and fixable stepped switching mechanism for adjusting the seat height or backrest rake of vehicle seats is known which has a first articulated arm serving as a frame in which a shaft is mounted which is connected rotationally secured to a second articulated arm, and a toothed setting wheel for adjustment as well as an operating arm with two entrainment members. Between the shaft and setting wheel there are two coil springs which resiliently adjoin a bush socket and are arranged in opposite directions and with play on each side adjoin the shaft through one end area and a stop rotationally connected to the setting wheel by the other end area. When the operating arm is swivelled, achieved by swivelling to and fro (`pumping`) a handle rigidly connected to the operating arm, the stop first strikes the coil spring which would lock rotation of the shaft in the same rotary direction, then during continued swivel movement unlocks this coil spring and transfers the further swivel movement to the shaft.
As a result of the toothed engagement between the entrainment members and the toothed setting wheel the self-locking stepped switching mechanism known from DE 36 08 858 A1 allows solely a stepped adjustment of the seat height or backrest rake. Furthermore as a result of its special method of functioning the known stepped switching mechanism does not allow any variation in the structural shape for different installation depths and transmission ratios of the force transfer from the operating lever to the shaft.
It is an object of the present invention to provide a self-locking stepped switching mechanism of the kind already mentioned which is capable of infinite adjustment and which can be manufactured cost-effectively and in different variations through a modular construction and the ability to use punched and deep drawn parts.
This is achieved according to the invention through the features of claim 1.
The solution according to the invention allows an infinite adjustment of the self-locking stepped switching mechanism and enables through the modular construction and the ability to use punched and deep drawn parts a cost-effective effective manufacture and different structural shapes to be produced for the different structural depths, surfaces and transmission ratios.
In order to produce a flat adjusting device having a minimal diameter the coupling device is mounted concentric with the brake device.
As an alternative the coupling device can be mounted coaxial and axially off-set relative the brake device. This embodiment is characterised by an overall small diameter and is particularly suitable for assemblies where there is restricted radial space.
In a further alternative the coupling device and the brake device can be mounted side by side and connected together through a positive locking connection device whereby a translation is produced between the drive and output side of the adjusting device which on the one hand minimises the play on the drive side of the adjusting device and on the other produces practically any type of transmission ratio between the drive and output side for adjusting the drive force or adjustment path.
An advantageous development of the solution according to the invention is characterised in that the infinitely operating stepped switching mechanism contains a resetting device which when the coupling device is blocked moves the drive element back into the starting position prior to the adjustment movement.
Resetting the drive element when the coupling device is blocked makes `pumping` easier in a setting of the drive element which is advantageous for the user, whereby the infinite adjustment allows any type of angular setting of the drive element.
One design of the coupling device is characterised by an entrainment member mounted coaxial with the drive axis of the drive element and by a drive spring, formed as a loop spring, embracing
REFERENCES:
patent: 4614257 (1986-09-01), Harada et al.
patent: 4778138 (1988-10-01), Yamada
patent: 4926987 (1990-05-01), Honma
patent: 4953676 (1990-09-01), Yamada et al.
patent: 5275262 (1994-01-01), Ojima et al.
Brose Fahrzeugteile GmbH & Co. KG Coburg
Marmor Charles A
Rodriguez Saul
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