摘要:
An apparatus for measuring and recording the angular position of the edges of axially extending grooves disposed on an inside cylindrical bore surface or outside cylindrical surface of a workpiece is characterized in that the apparatus includes a shoe, pressed into intimate contact with the surface over a zone of the shoe. The zone incorporates an orifice, extending away from the zone of intimate contact to a plenum chamber, to which fluid is supplied. Relative rotation between the workpiece and the shoe is produced. A measuring device measures the degree of restriction to flow of fluid from the orifice as the edges traverse the orifice during relative rotation. An angular positional measurement device measures relative rotation, such that relative angular positions of the workpiece are recorded at each relative rotational position corresponding to a predetermined degree of restriction of the orifice as successive edges of the grooves traverse the orifice.
摘要:
A machine for grinding the metering edge contours on edges of axially extending grooves of a power steering valve input-shaft by means of a cylindrical grinding wheel, the machine being constructed to hold and rotate the input-shaft and to increase and decrease cyclically the distance between the axis of the input-shaft and the grinding wheel several times during the revolution of the input-shaft to grind metering edge contours to produce symmetrical sets of clockwise and anticlockwise metering edge contours. The input-shaft is centrelessly supported by means of surfaces tangentially contacting the outside diameter of the input-shaft. Two such surfaces are axially displaced on either side of the ends of the grooves in the input-shaft and are arranged one on each side of the grinding wheel on that side of the input shaft adjacent the grinding wheel. Other of the support surfaces are arranged substantially at right angles to the first two support surfaces to constrain the input-shaft against motion in a direction parallel to the first two support surfaces. A pair of pressing members contacts the outside diameter of the input-shaft one each displayed axially on either side of the ends of the grooves and loaded so as to press the input-shaft in a direction generally towards the first two support surfaces.
摘要:
A front and rear wheel steering system for a vehicle has a front steer system (23, 25) and a rear steer system (21, 22) with a rear steer controller (12) functioning to set the rear steer angle in dependence upon front steer angle and vehicle speed. A low load capacity feedback device (14) functions to maintain a predetermined relationship between front and rear wheel steer angles with an overload protector (74, 77, 78) protecting the feedback device (14) from damage due to the application of loads above a predetermined level.
摘要:
A machine for grinding the outer metering edge contours (26) on the edges of the axially extending grooves (18) of a power steering gear input-shaft (10) in which a substantially cylindrical grinding wheel (40) whose working surface is dressed parallel to the axis of the input-shaft (10) effects the grinding, the distance between the input-shaft (10) and the grinding wheel (40) being cyclically increased and decreased several times during each revolution of the input-shaft (10) in such a manner that each outer metering edge contour (26) so ground has a form which is a mirror image of the form of at least one other outer metering edge contour (26) around the outside periphery of the input-shaft (10), characterized in that the angular velocity of the input-shaft (10) is varied cyclically in a manner co-ordinated with the cyclic increase and decrease of the distance between the input-shaft (10) and the grinding wheel (40) thereby substantially reducing the peak rate of stock removal per unit time compared with the peak rate that would occur if the angular velocity were constant and equal to the mean value of the cyclically varying angular velocity.
摘要:
A hydraulic power steering rotary valve of generally conventional construction characterized in that the on-center characteristics of the valve are governed by an arrangement of rolling elements and pairs of notched elements arranged to produce a detent action between the input shaft and the sleeve or driven member. One notched element of each pair is fixed to a carrier which is connected to the sleeve or driven member by a securing device. During assembly, the carrier is free to move under the influence of springs acting on the notched elements and thereby take up a position such that after completion of assembly the notched elements and rolling elements are precisely in the correct position to provide the required detent action.
摘要:
A rotary valve (1) for hydraulic power steering of vehicles with arcuate slots (9,10) in the sleeve (2) and slots (11) in input-shaft (3) of the valve (1) where some of the slots (10) in the sleeve (2) are formed to provide hydraulic fluid return ports (13) axially of the valve (1) between the sleeve (2) and the input-shaft (3) while the axial extent of adjacent sleeve slots (10) and input-shaft slots (11) is the same at their ends remote from the return ports (13).
摘要:
A rack and pinion steering gear in which the rack is supported under normal or lightly loaded conditions by one or more rolling elements bearing on a face or faces of the rack, the support being spring loaded to urge the rack into slack-free engagement with the pinion. A second support means providing plain bearing faces is arranged so as to be normally out of contact with the face of the rack opposite the teeth by a predetermined and adjustable amount, the structure being such that when higher forces are applied tending to separate the rack and pinion the spring loading of the first support is resiliently deformed to allow the rack to come into contact with the second support.
摘要:
A compact rack and pinion steering gear mechanism incorporating an overlapping or "piggy-back" configuration. A variable ratio embodiment incorporates a substantial ratio change with minimum complication of structure by providing relative lateral movement between the rack and pinion simultaneously with longitudinal movement of the rack.
摘要:
Apparatus for machining an angularly disposed array of slots (FIG. 7) concentric with the axis (85) of a bore of a valve sleeve (1) which has a sleeve holder (3) which is rotatably indexed for locating the arcuate position of each slot of the array, a cutting tool (5) positioned on the apparatus to cut a slot in the bore of the sleeve at each indexed location and a boring device (80, 81, 82, 83, 90) for forming the bore co-axially with the array of slots; the operation of the cutting tool (5) and boring device (80, 81, 82, 83, 90) taking place while the sleeve (1) is mounted in the one orientatioln in the holder (3).
摘要:
A mechanical function generating mechanism for a front and rear wheel steered vehicle is operable to generate a rear steer angle output as a function of front steer angle and vehicle speed inputs. The mechanism has a three dimensional cam with a cam surface and a contacting follower. The cam surface is traversed relative to the follower in a first direction in accordance with the front steer angle input and is traversed relative to the follower in a second direction substantially at right angles to the first direction according to the vehicle speed input. The follower is constrained to move in a third direction, determined by the shape of the cam surface, substantially normal to the first and second directions to generate the rear steer angle output.