Axle stabilizer for railway truck
AssigneePullman Standard Inc.
InventorsEugene R. Tylisz, Bradford Johnstone
Life of this patent
Estimating the term…
Abstract
An elastomeric pad placed in shear and having one portion or surface engaged with a portion of a railway car body and another portion or surface engaged by pivotal linkage means to a wheel housing dampens vibrations of a wheel and axle assembly which is resiliently mounted to the car body for rollingly supporting the car body. The pivotal linkage is elongated and connected to the wheel housing and the car body using spherical bearings to minimize wear. The linkage is attached at an angle of inclination to minimize strain on the elastomeric pad and linkage assembly caused by vertical travel of the railway car body due to varying weight loads.
Claims19
In a railway car having a truck, said truck having an axle having a pair of wheels and two end portions, each of said end portions being journaled for rotation in an axle housing, each of said axle housings engaging and supporting a resilient suspension member supportingly engaged with a car body of the railway car, an improved axle stabilizer comprising:
- first engagement means affixed to one of said axle housings;
- second engagement means affixed to said car body;
- resilient elastomeric movement absorption means affixed to said second engagement means;
- and
- linkage means having a first portion operatively associated with said first engagement means and a second portion operatively associated with said solid resilient movement absorption means, said linkage means being substantially rigid lineally for serving to retard said axle housing from oscillating horizontally with respect to said car body;
- the linkage means having a first end including first pivot means pivotally connected with the first engagement means and a second end having second pivot means pivotally connected with the resilient elastomeric movement absorption means;
- the first and second pivot means permitting pivoted movement of the linkage means in substantially a vertical plane whereby the linkage means transmits primarily the longitudinal movement of the axle housing to the elastomeric movement absorption means to prevent hunting of the axle and wheels and to reduce wear on the elastomeric movement absorption means;
- and
- said resilient movement absorption means including:
- a linkage connection portion connected with the second pivot means of the linkage means for movement therewith when the axle housing moves longitudinally;
- an intermediate portion connected with the linkage connection portion and extending therefrom in a direction generally perpendicular to said vertical plane;
- and
- a body connection portion being connected with the second engagement means to remain substantially fixedly positioned with respect to said car body, said body connection portion being connected with the intermediate portion and being positioned away from the linkage connection portion along said direction generally perpendicular to the vertical plane whereby longitudinal movement of the axle housing with respect to the car body is damped to prevent hunting of the wheels by the resilience in shear of the resilient movement absorption means throughout the range of vertical movement of the axle housing with respect to the car body responsive to varying loads on the suspension member.
An improved movement damping assembly for retarding movement of an axle housing of railway car truck with respect to the railway car car body, said damping assembly comprising an elastomeric pad having a first engagement means rigidly affixed to a portion of the railway car body, linkage attachment means affixed to a portion of said pad for placing said pad in shear between said first engagement means and said linkage attachment means, linkage means having a first and a second end, said first end being pivotally engaged with said linkage attachment means, and said second end being pivotally engaged with the axle housing of the railway car truck for enabling said axle housing to move vertically with respect to said car body and for retarding longitudinal oscillatory movement of said axle housing with respect to said car body to prevent hunting;
- and
- said linkage attachment means being positioned transversely of the first engagement means with respect to the linkage means whereby the pad damps longitudinal movement of the axle housing by the resiliency of the pad in shear;
- and
- said pad extending substantially horizontally between said linkage attachment means and said first engagement means whereby longitudinal movement of the axle housing is damped by the resilience of the pad in shear throughout the range of vertical movement of the axle housing with respect to the car body.
A movement controlling assembly for controlling movement of an axle housing of a railway car truck of a railway car with respect to a car body of said railway car, said controlling assembly comprising:
- an elastomeric pad having a first surface portion affixed to a car body engagement means, said car body engagement means being affixed to a portion of said car body of said railway car, said pad having a second surface portion affixed to a first linkage engagement means;
- second linkage engagement means being engaged with said axle housing;
- and
- linkage means extending between and engaged with each said first and second linkage engagement means to transmit movement of the axle housing to the elastomeric pad to damp longitudinal movement of the axle housing to prevent hunting;
- and
- said car body engagement means and said linkage means being spaced from each other in a generally horizontal direction transverse to the linkage means for placing the pad in shear therebetween;
- said elastomeric pad having an intermediate portion connecting the first and second surface portions and extending therebetween generally transversely with respect to the linkage means to damp the longitudinal movement of the axle housing by resilience in shear;
- and
- said intermediate portion extending substantially horizontally between the first and second surface portions whereby longitudinal movement of the axle housing with respect to the car body is damped by the resilience in shear of the pad throughout the range of vertical movement of the axle housing with respect to the car body.
In a railway car having a truck, said truck, having an axle having a pair of wheels and two end portions, each of said end portions being journaled for rotation in an axle housing, each of said axle housing engaging and supporting a resilient suspension member supportingly engaged with a car body of the railway car, an improved axle stabilizer comprising:
- first engagement means affixed to one of said axle housings;
- second engagement means affixed to said car body;
- resilient elastomeric movement absorption means having linkage engagement means thereon and being affixed to said second engagement means;
- and
- linkage means having a first portion having first pivot means pivotally engaged with first engagement means and a second portion having second pivot means pivotally engaged with said linkage engagement means on said resilient movement absorption means to damp movement of the axle housing for prevention of hunting;
- said first and second pivot means allowing pivoted movement of said linkage means in a generally vertical plane for enabling said axle housing to move vertically with respect to said car body with reduced wear on the resilient elastomeric movement absorption means and said linkage means being substantially rigid lineally for serving to retard said axle housing from oscillating horizontally with respect to said car body;
- and
- said first and second pivot means including spherical bearing means for reducing wear between said linkage means and said first engagement means and said linkage engagement means during lateral movement of said axle housing with respect to the car body;
- and
- said resilient movement absorption means including;
- a linkage connection portion connected with the second portion of the linkage means for movement therewith when the axle housing moves longitudinally;
- an intermediate portion connected with the linkage connection portion and extending therefrom in a direction generally perpendicular to said generally vertical plane;
- and
- a body connection portion being connected with the second engagement means to remain substantially fixedly positioned with respect to said car body, said body connection portion being connected with the intermediate portion and being positioned away from the linkage connection portion along said direction generally perpendicular to the generally vertical plane whereby longitudinal movement of the axle housing with respect to the car body is damped to prevent hunting of the wheels by the resilience in shear of the resilient movement absorption means throughout the range of vertical movement of the axle housing with respect to the car body responsive to varying loads on the suspension member.
In a railway car having a truck, said truck having an axle having a pair of wheels and two end portions, each of said end portions being journaled for rotation in an axle housing, each of said axle housing engaging and supporting a resilient suspension member supportingly engaged with a car body of the railway car, an improved axle stabilizer comprising:
- first engagement means affixed to one of said axle housings;
- second engagement means affixed to said car body;
- resilient elastomeric movement absorption means having linkage engagement means thereon and being affixed to said second engagement means;
- linkage means having a first portion engaged with said first engagement means and a second portion engaged with said linkage engagement means on said solid resilient movement absorption means;
- said linkage means having pivot means for enabling said axle housing to move vertically and laterally with respect to said car body and said linkage means being substantially rigid lineally for serving to retard said axle housing from oscillating horizontally with respect to said car body;
- and
- said resilient elastomeric movement absorption means comprising:
- a first portion connected with the linkage engagement means;
- a second portion connected with the second engagement means;
- and
- said linkage engagement means and said second engagement means being spaced from each other in a generally horizontal direction transverse to the linkage means for placing the resilient movement absorption means in shear therebetween;
- an intermediate portion connecting said first and second portions of the movement absorption means and extending therebetween generally transversely with respect to the linkage means to damp the longitudinal movement of the axle housing by the resilience in shear of the movement absorption means to prevent hunting;
- and
- said intermediate portion extending substantially horizontally between the first and second portions whereby longitudinal movement of the axle housing with respect to the car body is damped by the resilience is shear of the movement absorption means throughout the range of vertical movement of the axle housing with respect to the car body;
- and
- the first engagement means being positioned relative to the second engagement means so that the second portion of the linkage means is relatively higher than the first portion of the linkage means when the car is in lightest-load condition and the second portion is relatively lower than the first portion when the car is in its heaviest-load condition, thereby reducing longitudinal strain in the axle stabilizer due to vertical travel of the car body responsive to varying loads.
In a railway car having a truck, said truck having an axle having a pair of wheels and two end portions, each of said end portions being journaled for rotation in an axle housing, each of said axle housings engaging and supporting a resilient suspension member supportingly engaged with a car body of the railway car, an improved axle stabilizer comprising;
- first attaching means affixed to one of said axle housings;
- second attaching means affixed to said car body;
- resilient elastomeric movement absorption means affixed to said second attaching means;
- linkage attachment means connected with the resilient movement absorption means and extending therefrom generally away from the axle housing;
- linkage means having a first portion pivotally engaged with said first attaching means and a second portion pivotally engaged with said linkage attachment means for transmitting longitudinal movement of the axle housing to the resilient movement absorption means to prevent hunting of said truck;
- said linkage means being substantially rigid lineally for serving to retard said axle housing from oscillating horizontally with respect to said car body;
- and
- said linkage means extending from the first attaching means and away from the axle housing and pivotally engaging the linkage attachment means longitudinally beyond the movement absorption means to result in a longer linkage means for a given location of the movement absorption means thereby reducing the angular deflection of said linkage means relative to said first attaching means and said linkage attachment means and limiting resulting wear;
- and
- the resilient elastomeric movement absorption means extending between the linkage attachment means and the second attaching means in a substantially horizontal direction generally transverse to the linkage means whereby the longitudinal movement of the axle housing with respect to the car body is damped throughout the range of vertical movement of the axle housing with respect to the car body by the resilience in shear of the movement absorption means.
Dependencies are inferred from the claim text.