Showing papers on "Torsion spring published in 1983"

Vehicle steering and suspension system

Abstract: A three-wheeled vehicle steering and suspension system including two support assemblies for two opposed front wheels pivotably mounted at opposite sides of the vehicle frame and operatively connected by a hydraulic cylinder arrangement actuated by the vehicle steering linkage for inducing opposed pivotal movement of the support assemblies during vehicle turning to cause leaning of the vehicle in the direction of turning. A biasing arrangement provides the operative connection between the hydraulic cylinder and the support assemblies for transmitting lean-actuating reciprocatory movement of the hydraulic cylinder to the support assemblies while yieldably permitting independent pivotal movements thereof. The biasing arrangement may include respective torsion bars fixed at respective ends thereof to the opposite ends of the hydraulic cylinder and at the other respective ends thereof to the support assemblies, the torsion bars being correspondingly rotated by the hydraulic cylinder to actuate the opposed pivotal movement of the support assemblies. A shock absorber is mounted on each torsion bar and extends therefrom to the respective support assembly for dampening independent movements thereof without creating resistance to rotation of the torsion bar by the hydraulic cylinder. Alternatively, the shock absorber may provide the biasing connection between the hydraulic cylinder and the support assemblies. An electro-hydraulic system actuates reciprocation of the hydraulic cylinder in direct relation to the degree of vehicle turning and to the vehicle speed.

Door handle for a vehicle

Abstract: An internal door handle assembly for operating a locking mechanism. The handle is assembled into a casing so that projections on either the handle or the casing fit into grooves in the other. A torsion spring biases the handle to its closed position. A lever arm of the handle is secured by a pin to a rod that operates the locking mechanism. Once assembled, the rotational angle of the handle is limited by abutting the casing.

Power steering "road feel"

Abstract: This "paper" discusses current power steering characteristics and considers why and how the characteristics should change for different driving conditions It then compares the different ways in which this can be done and considers the advantages and disadvantages of each, including some of the safety aspects It is mainly, but not exclusively, concerned with motor cars and is basically confined to the modern hydraulic power steering rotary valve which uses torsion bar springing Most of the illustrations relate to rack and pinion steering but, in a general sense, all that is said can be applied to other types of steering gear

Lock-up clutch of a torque converter

Abstract: The present invention discloses a lock-up clutch of a torque converter comprising a disc hub adapted to be connected slidably only in an axial direction to a turbine hub of a torque converter and having a radial flange, a pair of annular side plates disposed at both sides of the hub flange, torsion spring mechanisms disposed in openings and hollows in the hub flange and the side plates for connecting the side plates to the hub flange, each torsion spring mechanism having plural elastic members aligned in the disc circumferential direction in series with floating spacers therebetween, a friction portion provided on a radially outer portion of the side plate and adapted to be axially pressed to an inner surface of a front cover of the torque converter, and a forcing means for forcing and pressing the friction portion to the front cover.

Force motor with null centering and null position bias

Abstract: Motor (1) includes an internal torsion spring (30, 30') which provides for null centering of the rotor assembly (2) while minimizing bearing load reactions and related friction. Two such centering springs (30, 30') may be provided whereby in the event one spring should fail, the other spring will still be operative to perform the desired null centering function. Also, an internal leaf spring (38) interiorly of the rotor casing (3) absorbs the full stroke rotor inertia without part damage or deformation. The null position bias of a motor driven valve may be established by adjustment of a pair of set screws (53, 54) which adjust the rotor assembly off null without inducing undesirable friction. The stator electrical torque null of the motor may also be set by providing an adjustable eccentric pin (48) in the stator housing (22) which is engageable in a notch (50) in the rotor casing (3).

Measure tape and key chain combined device

Abstract: A tape measure and key chain combined device comprising a cover and rotating shaft having a spiral torsion spring and key chain pulley connected to the shaft with the tape measure connected to the spring so that the key chain and tape are rewound respectively. By pulling either the tape or the key chain, the spiral torsion spring contracts to allow the tape or key chain to be extracted from the cover for use and automatically recoils after use by the spiral torsion spring expansion.

Combination round coil spring and rectangular torsion coil spring assembly

Abstract: A core spring assembly combines the use of rows and/or columns of round coil springs with rows and/or columns of rectangular torsion bar coil springs, all interconnected in a top plane by a welded wire grid so as to create a spring core assembly for a bedding mattress or box spring. In one preferred form, the rectangular torsion bar coil springs are located about the periphery of the spring assembly while in another embodiment the rectangular torsion bar coil springs are all located in the center one-third of the spring assembly so as to increase the firmness of that center section of the unit.

Torque detecting device

Abstract: PURPOSE:To make it possible to detect small torque highly accurately and to provide strength against large torque, by providing a tubular body, which is linked by a coupling structure that is provided with play and engaged and comprises a magnetic body that is fixed to both shafts; and covering the outer surface of the coupling part of a shaft to be measured. CONSTITUTION:Torque is applied to a shaft 10 to be measured. When the torque is relatively small, twisting moment acts on a tubular body 15 and a small diameter part 16b of a torsion bar 16, because engaging pawls 13 and 14 of two shafts 11 and 12 have plays. At this time, the twisting strength of said tubular body 15 and the small diameter part 16a of the torsion bar 16 are low. Therefore, the twisting amount is largely fluctuated with respect to the minute torque fluctuation, and the magnetostriction quantity yielded in the tubular body 15 is largely fluctuated. When relatively large torque is applied, the twisting moment also acts on the shafts 11 and 12, and the fluctuating rate of the twisting quantity of the tubular body 15 with respect to the fluctuation quantity becomes small.

Stripping device for cleaning conveyor belts, especially reversing belts

Abstract: 1. A wiping-off mechanism for the cleaning of conveyor belts, particularly reversible belts, with an axle in bearings located below the conveyor belt concerned to which axle are attached torsion spring arms with scraper blades at their ends, which are pressed in a dragging position against the return belt running in the backwards direction, characterized in that the scraper blades (5) are mounted, with interposition of torsion spring-couplings (7) having a torsional axis (8) transverse to the running direction of the belt, to the ends of the torsion spring arms (4) and thereby when the conveyor belt (1) is reversed in direction tip over from their dragging forward-running position into a dragging reverse-running position.

Wafer inverting apparatus

Abstract: PURPOSE:To invert a wafer in a vacuum device, by a method wherein a torsion spring is provided on a rotary support shaft of a jig, with one end of the spring secured to a fixed plate and the other to a movable plate, and the spring is wound by the movement of the movable plate to rotate the rotary support shaft. CONSTITUTION:A semi-annular chuck 2 has a leaf spring 4 in the circumferential direction and pawls 3, 5 on the inside thereof to clamp a wafer 1. A support shaft is provided with coils 9-11 constituting a series spring 8, one end of which is secured to a driving arm 12, the other end of which is secured to the chuck 2. When the arm 18 is rotated by a motor 20, a planetary 6 and the arm 12 are rotated in one body. The planetary 6 is engaged with a groove in a rail 24 to perform rotation and revolution for uniformly subjecting wafers to evaporation by means of electron beams. The motor 20 is suspended at the position where a plate 28 of a driving device 27 engages with a collar 14, and the plate 28 and the collar 14 are pushed down. By the movement of the arm 12, the chuck 2 is rotated through the torsion spring 8 to invert the wafer 1. The chuck 2 abuts against a stopper 31 of the planetary 6 and stops after a 180 deg. rotation. This constitution permits the wafer to be reliably inverted in a vacuum, so that the evaporation productivity is improved.

Power steering gear with variable rate torsion bar for optimized steering

Abstract: Vehicle power steering gear with a torsion bar whose stiffness is adjusted by an axially shiftable nut that provides a movable gripping point for one end of the torsion bar whose position determines the pliable length of the bar and the steering effort required to steer the vehicle.

Assembly comprising a frame, unsteered wheels and spring suspension of a motor vehicle

Abstract: The invention provides an improvement in an assembly comprising a frame for a motor vehicle, a pair of unsteered wheels disposed on opposite sides of the frame, and a spring suspension comprising a respective longitudinal control arm connected to each one of the wheels for constraining the wheel, each control arm having a hub, a respective bearing sleeve having one end secured to the frame and associated with a respective one of the control arms, the control arm hub being rotatably mounted in the associated bearing sleeve, the bearing sleeves having inner ends facing each other, a respective torsion bar associated with each wheel control arm for urging the control arm to a predetermined angular position about the axis of the associated bearing sleeve, the torsion bars having axes extending parallel to each other transversely to the direction of travel and the torsion bars being arranged one behind the other in this direction, and a respective anchor secured to the frame against rotation about the axis of an associated one of the torsion bars, one end of each torsion bar being fixed to the hub of the associated control arm and the other torsion bar end being fixed to the associated anchor. In the improvement, the anchors are concentrically mounted on the facing inner ends of the associated bearing sleeves and each anchor is a casting having a sprue eccentric with respect to the axis of the associated bearing sleeve, the other torsion bar ends being fixed in the eccentric sprues whereby the fixed other end of one torsion bar is offset from the fixed one end of the other torsion bar.

Flexible mounting for the forward end of a commercial vehicle cab

Abstract: Flexible mounting for the forward end (2) of a vehicle cab (1), in particular of commercial vehicles, by means of a torsion bar (14) as a spring element which is coaxially inserted into a transversely running support pipe (5) which is mounted on the vehicle frame (4) so as to swivel about a vehicle transverse axis (22) and to which the vehicle cab (1) is fixed by means of support arms (10, 11), the torsion rod spring (14) being attached by one end (16) in the support pipe (5) and by the other end (18) on the vehicle frame (4) with pretensioning, and in that shock absorbers (20, 21) acting parallel to the torsion rod spring (14) are connected in jointed fashion by one end to the vehicle cab (1) and by the other end to the support pipe (5) or to the vehicle frame (4).

Linkage mechanism for coupling two movable members

Abstract: A mechanism is disclosed to provide pivotal motion between two movable members. The mechanism includes a hemispherical yoke connected to one of the movable members. A center support is connected to the remaining movable member and is nested within the yoke and spaced apart therefrom. A set of four radially projecting torsion bars are connected to the yoke and center support. The torsion bars are substantially coplanar and define a cross-shaped configuration in plan. Four braces are provided to interconnect adjacent torsion bars. Preferably, each of the torsion bars is surrounded by a tubular segment which is affixed to the radially outer end of the torsion bars. Preferably the radially inner portion of the torsion bar is supported by a rotatable bearing. The subject mechanism is low in profile, easy to mount and dismount, and provides a degree of elasticity in the vertical axis.

Torsion bar vehicle door hinge assembly with hold open mechanism

Abstract: A door hinge assembly combined with a door holding device particularly for motor vehicles has a first and a second hinge member mounting the door for swinging movement between an open and a closed position, a torsion bar spring supported at one of the hinge members and having a load arm projecting over the height of the hinge member and directed parallel to the hinge axis and a pair of abutment rollers rotatively displaced against a spring disc which acts as a brake at the other of the hinge members located a distance from the hinge axis. The abutment rollers operate in cooperation with the load arm of the torsion bar to form a catch device for holding the door at least in the open position and the abutment rollers are formed with different diameters along their circumference and they are rotatably mounted about bearing axes, respectively, which are arranged spaced a distance from each other, which distance is less than the dimension of the larger diameter.

Steering power controller of power steering device

Abstract: PURPOSE:To both decrease axial length of a valve and eliminate the necessity for an oil groove introducing reaction force oil pressure, in a power steering device of rotary valve type, by flowing reaction force pressure oil in the interior of a worm shaft and transmitting the reaction force oil pressure to a reaction force generator mechanism. CONSTITUTION:The rear end side of a worm shaft 19 is constructed such that the peripheral surface is combined by a pin to an outer sleeve 23 fitted to a housing 16 while the internal peripheral surface is fitted to the point end part of an input shaft 24. An axially directional hole 34 and a through hole, communicated to said hole 34 and extended at a right angle with the axial direction, are provided in the point end side of the input shafr 24, and one end of a torsion bar 36 is coupled by a pin to the axially directional hole 34. Two steel balls 38 are fitted into the through hole 35 by interposing a coil spring 37. Reaction force pressure oil, flowing from a reaction force oil pressure generator to an oil inlet 22 and filling an internal space 33 of the worm shaft 19 and the through hole 35, flows little except a leak from the periphery of the steel ball 38 to a recirculation oil circuit, and the pressure is changed in accordance with a change of car speed. Accordingly, the steel ball 38 is pressed to a recessed part 40 in the worm shaft 19 by reaction force oil pressure and tension of the spring 37, to generate reaction force corresponding to a car speed.

Rotor blade for a horizontal-axis wind power installation

Abstract: Rotor blade arrangement for wind power installations having a horizontal axis consisting of an aerodynamically shaped, inherently linear, thin-walled hollow profile made from aluminium or plastic which is plugged, with or without precalculated torsion, onto a longitudinal spar, preferably in the form of a steel tube, which provides stability. The longitudinal spar is arranged near the profile nose upstream of the centre of pressure. The hollow profile can be packed with foamed material. The longitudinal spar is mounted in the longitudinal direction such that it can rotate in a hollow shaft against a spring resistance, with the result that, when a gust strikes, the profile rotates automatically out of the wind. The restoring springs of a plurality of rotor blades can be synchronised with one another to form a system which acts hydraulically. Legend 1 = Hollow profile 2 = Longitudinal spar 3 = Cavity packed with foamed material 4 = Longitudinal axis of rotation 5 = Centre of pressure 6 = Guide spring at blade tip 6a = Guide spring near hub 7 = Guide groove in hollow profile 8 = Tube shaft 9 = Bearing 10 = Torsion spring 11 = Hub flange

Torsional vibration damper with friction segments

Abstract: The invention relates to friction segments between the cover plates and the hub disc of a torsional vibration damper which - inserted into the apertures in the cover plates - both produce the friction force and assume the guidance of the torsion springs. Guidance of the torsion springs in a manner which is substantially free from wear is thereby achieved; it is at the same time possible to produce high friction forces since the friction segments are arranged at a long distance from the axis of rotation. The friction segments can be manufactured as compound components, the friction material being applied to a punched base element consisting of sheet metal.

Vertical axis wind turbine with feathering vanes

Abstract: Each of the vertically extending blades 10 of the turbine 9 is pivotally mounted about a vertical axis passing through the blade and a torsion bar 11 for automatically restraining pivotal movement of the blade about its vertical axis is provided. The wind generator has good self starting characteristics and, as the velocity of the wind increases, each turbine blade 10 will pivot against its associated restraining torsion bar 11 from an initial position to a normal running position (at an angle of 0 to +5 DEG of the tangent). If the velocity of the wind increases above a maximum acceptable value, each blade 10 will pivot smoothly from the normal running position to a "feathering" position thereby ensuring that, as the velocity of the wind exceeds the maximum acceptable value, the rotational speed of the turbine 9 is not increased to an undesirable extent.

Control device for roll rigidity in vehicle

Abstract: PURPOSE:To improve the steering safety of a car, by forming a roll rigidity sharing ratio at the front wheel side so as to make it large automatically at sudden steerage in time of car driving at high speed, in case of vehicles provided with a stabilizer capable of varying torsional rigidity by means of a driving device. CONSTITUTION:A torsional rigidity variable stabilizer 10 pivotally attaches both symmetrical end parts 15L and 15R rotatably to a central part 15c of a torsion bar 15, and makes turning arms 18 to be coupled with each other by a connecting rod 19 connecting both these end parts 15L and 15R turn round by an actuator 20, while it rotates plate parts 17 of these end parts 15L and 15R as far as 90 deg., making the width direction turn to a vertical direction whereby torsional rigidity is heightened. In this case, a control device 30 receiving each output of a steering angle speed operation circuit 29 connecting a speed detector 23 and a steering angle detector 27 is installed. And, when it is above the specified car speed and yet more than the specified steering angle, an actuator 22 of a torsional rigidity stabilizer 10A at the front wheel side is operated, thereby making a roll rigidity sharing ratio at the front wheel side large enough.

Lumbar support adjusting apparatus

Abstract: A lumbar support adjusting apparatus has a release plate pressed against a ratchet by a compression spring for urging the release plate under uniform resilient forces, and biased to return in its direction of rotation by a torsion spring, preferably a spiral spring, having one end secured to a shaft and the other end to a support plate. The compression force of the compression spring, and the torsional force of the spiral spring can be set independently of each other. The release plate can turn the ratchet and can be angularly returned to its original position smoothly and reliably without fail.

Apparatus for supporting ribbon cassette

Abstract: PURPOSE:To easily attach and detach a ribbon cassette, by supporting a cassette holder between an upper position capable of attaching and detaching the ribbon cassette and an printing operable printing position with respect to a frame in a swingable manner. CONSTITUTION:A cassette holder 7 is arranged to an upper position shown by the broken line in the drawing and a ribbon cassette 15 is inserted into a storing part 7a from the rear side of the holder 7 through the space between an upper and a lower extended pieces 7b, 7c while the positioning piece 19 of the cassette 15 is brought into engagement with the piercing hole of the holder 7 and the engaging piece 18 is mounted by engaging the same with the rear side flange of the lower extended piece 7c while an engaging piece 12 is mounted by engaging the same with the rear side flange of the cassette 15. In the next step, the cassette 15 and the holder 7 is revolved to a counterclockwise direction against the spring force of a torsion spring 10 to be arranged to the printing position shown by the solid line in the drawing and an engaging protrusion is engaged with the torsion spring 10 from the lower part thereof to certainly hold the cassette 15 to a printing position.

An improved seat

Abstract: A seat comprises a seat carrier 4 and a back rest 5 pivotable relative to one another about an approximately horizontal axis 6. A gas compression spring 36 is provided for the return or restoring movement and for optional positional location. There is a further spring 34 against which, in the rearward pivoted end position of the back rest, a part of the back rest, seat carrier and/or gas compression spring abuts thereby acting as a buffer. The further spring may be a leaf spring (30, Fig. 1), a helical tension or compression spring or a torsion spring.

Testing apparatus for power steering device

Abstract: PURPOSE:To reproduce the state close to an actual vehicle and to test self-excited vibration caused by especially negatively inputted vibrations, by providing a pair of a spring type load absorbing device and a power steering device, and also providing two servo hydraulic actuators as positive and negative input vibrating devices. CONSTITUTION:When a switch is thrown to the positive input side, a servo hydraylic actuator 27 is actuated, a vibration input corresponding to a control signal is imparted to an input shaft 22, and a power steering device 20 is actuated. The power transmitted to a load absorbing device 11 through a rotary arm 15 is absorbed by a torsion bar 13, and self-excited vibration is reproduced. When the switch is thrown to the negative input side, a servo actuator 36 is actuated, and a reverse input is imparted to the steering device 20. Under this state, the actuator 27 is actuated through a torsion bar 23. Since the torsion bar 23 performs the absorbing action of the vibration imparted by a road surface, the self-excited vibration can be reproduced by the switching action under the state close to an actual vehicle.

Torsion spring adjusting tool and method

Abstract: A torsion spring adjusting tool comprises a hexagonal shank to one end of which are welded confronting plate portions which project longitudinally outwardly from said one end, the arrangement being such that wrench means engaging said hexagonal shaped shank can apply a twisting source to a portion of torsion spring extending between said confronting plates. The confronting plates have their confronting surfaces configured to provide obliquely exposed cylindrical passageways inclined at a substantial angle one to the other so that the tool is suitable either to right-hand or left-hand operation.

Movable electrical contact capable of accommodating devices exhibiting a plurality of different sizes

Abstract: An electrical contact assembly is provided which is capable of accommodating batteries for other electrical devices exhibiting a plurality of different physical sizes. A V-shaped contact arm having a hook-shaped member at one end thereof and a double torsion spring at the remaining end thereof is mounted to a battery housing surface. The double torsion spring end of the V-shaped member is mounted on a support post and is fixedly held in position such that the torsion spring does not freely rotate. The hook-shaped end of the V-shaped member is engaged by a second post adjacent to the first post so as to place the contact arm under tension. The tip of the V-shaped member thus forms an elbow which deflects to a greater or lesser degree depending upon the size of the electrical device to be contacted.

Method of forming and feeding torsion springs

Abstract: A torsion spring having a coiled portion and straight ends is formed on a spindle by a winding machine with the coiled portion being wound around the spindle. A transfer device for transferring the torsion spring to a spring feeding position in which the torsion spring is fed to a spring inserting device receives the torsion spring directly from the spindle and transfers it to the spring feeding position keeping the torsion spring in a predetermined orientation.

Wind power installation in a group system

Abstract: In the case of known wind power installations windmill sails were so arranged that the wind power wheels turned only in one direction. As a result the torsional forces were not adequately excluded; in addition the speed of rotation could not be controlled. These problems are resolved according to the invention in that a plurality of wind wheels in pairs rotate in opposing directions, which as a result reduce or cancel out the torsional forces. A centrifugal governor is fitted for controlling the speed of rotation. The centrifugal governor (9) transmits its action to the torsion bar (26); this produces an axial movement of the contact plate (21) and the connecting rods (22). The rods are connected by deflection to the stay bolts (25) of the blades (17) so that the blades can be turned about the axis line (24) and the narrow side of the blades thereby set against the direction of the wind. The wind power installation can be used to produce energy in widely varying contexts, both as a small power installation and as a large power installation.

Automatic tension adjusting mechanism for paper in printer

Abstract: PURPOSE:To provide the titled mechanism easy to operate and capable of avoiding troubles due to a failure in operation, by interlocking a tension-adjusting mechanism for a paper with a paper thickness adjusting mechanism so that an appropriate tension on the paper can be obtained by simply operating the paper thickness adjusting mechanism. CONSTITUTION:An eccentric cam 14 is rotated by a knob 17 to slightly rotate a gate hinge 13 with a hinge shaft 15 as a center, and a gate 17 is moved to change the distance between a printing hammer 2 and a platen 8 and that between the hammer 2 and a type belt 9. On the other hand, one end of each torsion spring 5 having the other end fixed to a shaft 6 is abutted against the lower end of each of paper-pressing plates 3, and the pressure exerted on the paper by the plates 3 is changed through changing the forces of the springs 5 by rotating the shaft 6. A belt 16 connects the cam 14 and the shaft 6 to each other.