The present disclosure generally relates to railroad spikes and, more specifically, to wear plates of tray heads for a railroad spike dispenser.
Railroad spike machines are configured to drive railroad spikes into the ground to fix components of the railroad to the ground. Conventional railroad spike machines typically include a spike tray that stores the railroad spikes, an actuating device that drives the railroad spikes into the ground, and a tray head that transfers the railroad spikes from the spike tray to the actuating device. Over time, portion(s) of the tray head may wear down due to railroad spikes repeatedly sliding along surface(s) and/or edge(s) of the tray head. In turn, the tray head may need to be replaced in order for the tray head to properly feed railroad spikes to the actuating device that drives the railroad spikes into the ground. The maintenance costs associated with removing the worn-down tray head from the workhead and attaching a new tray head to the workhead may potentially be expensive.
The present disclosure summarizes aspects of the embodiments and should not be used to limit the claims. Other implementations are contemplated in accordance with the techniques described herein, as will be apparent to one having ordinary skill in the art upon examination of the following drawings and detailed description, and these implementations are intended to be within the scope of this application.
Example embodiments are shown of tray heads and wear plates for tray heads for a railroad spike dispenser.
An example disclosed tray head of a railroad spike dispenser includes a first wall defining a first sloped surface and a second wall defining a second sloped surface. The first wall and the second wall are parallel to and spaced apart from each other to at least partially define an inlet, an outlet, and a channel extending between the inlet and the outlet for a shank of a railroad spike. The example disclosed tray head also includes a first wear plate removably coupled to the first sloped surface and defining a first sloped wear edge along which a head of the railroad spike is to slide as the shank travels through the channel between the inlet and the outlet. The example disclosed tray head also includes a second wear plate removably coupled to the second sloped surface and defining a first sloped wear edge along which the head of the railroad spike is to slide as the shank travels through the channel between the inlet and the outlet.
In some examples, at least one of the first sloped wear edge and the second sloped wear edge is configured to engage the head of the railroad spike to prevent the railroad spike from falling through the channel. In some examples, to enable the railroad spike to slide from the inlet to the outlet, apexes of the first and second sloped surfaces at least partially define the inlet and nadirs of the first and second sloped surfaces at least partially define the outlet.
In some examples, the first and second wear plates are case hardened. In some such examples, the first and second wear plates include ferritic-nitrocarburized case-hardened steel. In some such examples, the first wall and the second wall include non-case-hardened material.
Some examples include a flange connecting the first wall and the second wall. The flange extends away from the first sloped surface and the second sloped surface to provide access to the channel.
Some examples include a base that is connected to the first wall. The base is configured to couple the tray head to a spike driving workhead of the railroad spike dispenser. In some such examples, the first and second wear plates are configured to be detachable from the first and second walls to enable the first and second wear plates to be replaced while the base remains coupled to the spike driving workhead of the railroad spike dispenser. Some such examples further include a guide support coupled to the base. The guide support is configured to guide the railroad spike from the outlet to feed the railroad spike to an actuating device of the railroad spike dispenser.
Some examples include pins that are configured to guide coupling of the first wear plate to the first wall and the second wear plate to the second wall.
Some examples include threaded fasteners configured to couple the first wear plate to the first wall and the second wear plate to the second wall. In some such examples, the first and second wear plates define through holes and the first and second walls define threaded holes. The threaded fasteners are configured to extend through the through holes and be received by the threaded holes to couple the first wear plate to the first wall and the second wear plate to the second wall. Further, in some such examples, the first and second wear plates define counterbore holes that are concentrically aligned with the through holes and extend from respective upper surfaces of the first and second wear plates to deter the threaded fasteners, when received by the threaded holes, from extending beyond the upper surfaces of the first and second wear plates. Further, in some such examples, the through holes are located adjacent to outer edges opposite the first and second sloped wear edges to deter the through holes from affecting movement of the head of the railroad spike along at least one of the first sloped wear edge and the second sloped wear edge.
In some examples, the first wall defines a first groove on the first sloped and the second wall defines a second groove on the second sloped surface. The first groove forms a first slot when the first wear plate is coupled to the first wall and the second groove forms a second slot when the second wear plate is coupled to the second wall. The first slot is configured to receive a flat tool-head to enable the first wear plate to be pried from the first wall and the second slot is configured to receive the flat tool-head to enable the second wear plate to be pried from the second wall.
In some examples, each of the first sloped wear edge and the second sloped wear edge is concave. In some such examples, each of the first sloped wear edge and the second sloped wear edge includes at least one obtuse angle.
In some examples, the first wear plate and the second wear plate are asymmetrical with respect to each other. In some such examples, the first sloped wear edge is longer than the second sloped wear edge and is configured to extend beyond the second sloped wear edge adjacent the outlet. In some such examples, the first wear plate includes a shelf. The shelf is configured to be adjacent the outlet, extend beyond the second sloped wear edge, and provide a surface on which the head of the railroad spike is to rest adjacent the outlet prior to ejection from the tray head. In some such examples, a portion of the second wear plate adjacent the outlet has a greater height than an opposing portion of the first wear plate.
An example disclosed set of wear plates for a tray head of a spike dispenser includes a first wear plate configured to removably couple to a first sloped surface of a first wall of the tray head. The first wear plate defines a first sloped wear edge along which a head of a railroad spike is to slide when the first wear plate is coupled to the first wall and a shank of the railroad spike travels through a channel. The example disclosed set of wear plates also includes a second wear plate configured to removably couple to a second sloped surface of a second wall of the tray head. The second wear plate defines a second sloped wear edge along which the head of the railroad spike is to slide when the second wear plate is coupled to the second wall and the shank of the railroad spike travels through the channel. When coupled to the first and second walls, respectively, the first and second wear plates are configured to be parallel to and spaced apart from each other to at least partially define the channel.
In some examples, when coupled to the first wall and the second wall, respectively, at least one of the first sloped wear edge and the second sloped wear edge is configured to engage the head of the railroad spike to prevent the railroad spike from falling through the channel.
In some examples, the first and second wear plates are case hardened. In some such examples, the first and second wear plates include ferritic-nitrocarburized case-hardened steel.
In some examples, the first and second wear plates define through holes through which threaded fasteners are to extend to couple the first wear plate to the first wall and the second wear plate to the second wall. In some such examples, the first and second wear plates define counterbore holes that are concentrically aligned with the through holes and extend from respective upper surfaces of the first and second wear plates to deter the threaded fasteners from extending beyond the upper surface of the first wear plate when coupled to the first wall and the upper surface of the second wear plate when coupled to the second wall. In some such examples, the through holes are located adjacent to outer edges opposite the first and second sloped wear edges to deter the through holes from affecting movement of the head of the railroad spike along the first sloped wear edge and the second sloped wear edge.
In some examples, each of the first sloped wear edge and the second sloped wear edge is concave. In some such examples, each of the first sloped wear edge and the second sloped wear edge includes at least one obtuse angle.
In some examples, the first wear plate and the second wear plate are asymmetrical with respect to each other. In some such examples, the first sloped wear edge is longer than the second sloped wear edge. In some such examples, the first wear plate includes a shelf. The shelf is configured to extend beyond the second sloped wear edge and provide a surface on which the head of the railroad spike is to rest prior to ejection from the tray head. In some such examples, an end of the second wear plate has a greater height than a corresponding end of the first wear plate.
An example disclosed detachable wear plate for a tray head of a railroad spike dispenser includes a body. The body defines a lower surface configured to couple to a sloped surface of a wall of the tray head. The body also defines a sloped wear edge along which a head of a railroad spike is to slide when the lower surface is coupled to the wall and a shank of the railroad spike travels through a channel partially defined by the wall. The sloped edge is spaced apart from the lower surface.
In some examples, when coupled to the wall, the sloped wear edge is configured to engage the head of the railroad spike to prevent the railroad spike from falling through the channel.
In some examples, the body is case hardened. In some such examples, the body includes ferritic-nitrocarburized case-hardened steel.
In some examples, the body defines through holes through which threaded fasteners are to extend to couple the body to the wall. In some such examples, the body defines the through holes are counterbore holes that are concentrically aligned with the through holes and extend from an upper surface to deter the threaded fasteners from extending beyond the upper surface when coupled to the wall. In some such examples, the through holes are located along an outer edge opposite the sloped wear edge to deter the through holes from affecting movement of the head of the railroad spike along the sloped wear edge.
In some examples, the sloped wear edge is concave. In some examples, the sloped wear edge includes at least one obtuse angle.
For a better understanding of the invention, reference may be made to embodiments shown in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted, or in some instances proportions may have been exaggerated, so as to emphasize and clearly illustrate the novel features described herein. In addition, system components can be variously arranged, as known in the art. Further, in the drawings, like reference numerals designate corresponding parts throughout the several views.
While the invention may be embodied in various forms, there are shown in the drawings, and will hereinafter be described, some exemplary and non-limiting embodiments, with the understanding that the present disclosure is to be considered an exemplification of the invention and is not intended to limit the invention to the specific embodiments illustrated.
Example apparatus disclosed herein include detachable wear plates that are removably coupled to a body of a tray head. The tray head of examples disclosed herein is configured such that railroad spikes slide along the wear plates when being fed to the device that drives the railroad spikes into the ground. The wear plates are case hardened to increase durability of portions of the tray head along which railroad spikes slide along. Further, the body of the tray head is formed from rigid and weldable material that is not case hardened. The wear plates are case-hardened to increase the durability of the tray head, while the body is not case-hardened to reduce the manufacturing costs of the tray head. Further, the wear plates are configured to be replaced while the body of the tray head remains coupled to a workhead to reduce maintenance time associated with the tray head. Additionally, because the wear plates are able to be replaced without replacing the body, maintenance costs associated with the tray head are reduced.
Turning to the figures,
Turning to
Turning to
The tray head 100 of the illustrated example also includes pins 806 (sometimes referred to as first pins) that facilitate alignment of the wear plate 200 with the sloped surface 502 of the wall 500. In the illustrated example, the pins 806 (e.g., roll pins, dowel pins, etc.) are snugly inserted into pin holes 506 defined by the wall 500 along the sloped surface 502 such that ends of the pins 806 protrude from the pin holes 506. As illustrated in
Further, the wear plate 200 is configured to be easily decoupled from the sloped surface 502 of the wall 500 by an operator without damaging the wall 500. To detach the wear plate 200 from the sloped surface 502 of the wall 500, the fasteners 802a are removed from the threaded holes 504 of the wall 500. In the illustrated example, the wall 500 defines a groove 508 (sometimes referred to as a first groove) on the sloped surface 502. As illustrated in
Returning to
The tray head 100 of the illustrated example includes pins 808 (sometimes referred to as second pins) that facilitate alignment of the wear plate 300 with the sloped surface 602 of the wall 600. In the illustrated example, the pins 808 (e.g., roll pins, dowel pins, etc.) are snugly inserted into pin holes 606 defined by the wall 600 along the sloped surface 602 such that ends of the pins 808 protrude from the pin holes 606. As illustrated in
The wear plate 300 also is configured to be easily decoupled from the sloped surface 602 of the wall 600 by an operator without damaging the wall 600. To detach the wear plate 300 from the sloped surface 602 of the wall 600, the fasteners 802b are removed from the threaded holes 604 of the wall 600. In the illustrated example, the wall 600 defines a groove 608 (sometimes referred to as a first groove) on the sloped surface 602. As illustrated in
Returning to
During operation, the tray head 100 is coupled to a spike driving workhead of the spike dispenser. In the illustrated example, the flange 700 is configured to couple to the spike dispenser. For example, the flange 700 defines apertures 704 that are located along a face 706 of the flange 700. Fasteners (e.g., threaded fasteners) are configured to extend through and/or into the apertures 704 to couple the flange 700 to the spike driving workhead. Additionally or alternatively, the base 750 of the tray head 100 is configured to couple to another portion of the spike dispenser. For example, the base 750 defines apertures 752 that are located along a face 754 of the base 750. Fasteners (e.g., threaded fasteners) are configured to extend through and/or into the apertures 752 to couple the base 750 to the spike driving workhead.
When the tray head 100 is coupled to the spike driving workhead, the tray head 100 enables a stream of railroad spikes (e.g., rail spikes, dog spikes, screw spikes, etc.) to flow, in an orderly manner, from the spike tray to the actuating device that is to drive the railroad spikes into the ground. Typically, a railroad spike includes a shank and a head at an end of the shank. The tray head 100, when coupled to the spike driving workhead, is positioned such that shanks of respective railroad spikes are fed from the spike tray and into the channel 900 of the tray head 100. For example, the shanks of railroad spikes (1) slide into the channel 900 through the inlet 902, (2) travel through the channel 900 between the inlet 902 and the outlet 904, and (3) exit the channel 900 through the outlet 904.
While the shanks of railroad spikes travel through the channel 900, the respective heads of the railroad spikes slide along the wear plates 200, 300. For example, the wear plate 200 defines an inner surface 210 (sometimes referred to as a first inner surface), the upper surface 206, and a wear edge 212 (sometimes referred to as a sloped wear edge, a first wear edge, or a first sloped wear edge) that is formed between the inner surface 210 and the upper surface 206. The inner surface 210, the upper surface 206, and the wear edge 212 are configured to engage a portion of the head of a railroad spike as the respective shank travels through the channel 900. That is, the head of a railroad spike is configured to slide along the inner surface 210, the upper surface 206, and/or the wear edge 212 of the wear plate 200 as the respective shank travels through the channel 900. Further, in some examples, the head of a railroad spike is configured to rest on the upper surface 206 and/or the wear edge 212 of the wear plate 200 to prevent the railroad spike from falling through the channel 900 while positioned between the inlet 902 and the outlet 904. That is, the upper surface 206 and/or the wear edge 212 is configured to engage an underside of the head of a railroad spike to prevent the railroad spike from falling through the channel 900.
Additionally, the wear plate 300 of the illustrated example includes an inner surface 310 (sometimes referred to as a second inner surface), the upper surface 306, and a wear edge 312 (sometimes referred to as a sloped wear edge, a second wear edge, or a second sloped wear edge) that is formed between the inner surface 310 and the upper surface 306. The inner surface 310, the upper surface 306, and the wear edge 312 are configured to engage a portion of the head of a railroad spike as the respective shank travels through the channel 900. That is, the head of a railroad spike is configured to slide along the inner surface 310, the upper surface 306, and/or the wear edge 312 of the wear plate 300 as the respective shank travels through the channel 900. Further, in some examples, the head of a railroad spike is configured to rest on the upper surface 306 and/or the wear edge 312 of the wear plate 300 to prevent the railroad spike from falling through the channel 900 while positioned between the inlet 902 and the outlet 904. That is, the upper surface 206 and/or the wear edge 212 is configured to engage an underside of the head of a railroad spike to prevent the railroad spike from falling through the channel 900.
In some instances, a continuous stream of railroad spikes are fed from the spike tray into the tray head 100. In turn, a plurality of railroad spikes hang from the wear plate 200 and/or the wear plate 300 and into the channel 900 in a single-file manner between the inlet 902 and the outlet 904. As one railroad spike exits the channel 900 through the outlet 904, each of the of railroad spikes within the channel 900 move one position closer to the outlet 904 and another railroad spike enters the channel 900 through the inlet 902.
To deter jamming or bending of the railroad spikes, each of the upper surface 206 of the wear plate 200 and the upper surface 306 of the wear plate 300 forms a slope to enable the railroad spikes to slide from the inlet 902 to the outlet 904 in an orderly manner. Further, if the railroad spikes do become jammed or bent within the channel 900, the flange 700 extends in a downward direction away from the sloped surfaces 502, 602 of the walls 500, 600 and the upper surfaces 206, 306 of the wear plate 200, 300 to provide access for an operator. For example, the configuration of the flange 700 enables an operator to unjam the railroad spikes by adjusting one or more railroad spikes within the channel 900 and/or removing a bent railroad spike from the channel 900. That is, the flange 700 is configured to protrude away from, instead of over, the channel 900 to enable an operator to unjam the tray head 100.
Once a railroad spike reaches the outlet 904 of the channel 900 of the tray head 100, an actuator drives the railroad spike to a device (e.g., a jaw) of the spike dispenser that drives the railroad spike into the ground. For example, upon reaching the outlet 904, a railroad spike is configured to rest on a shelf 228 of the wear plate 200 adjacent to the outlet 904. The guide support 400 and/or a retaining device (e.g., a hook) located below the guide support 400 are configured to further facilitate the railroad spike in remaining in place prior to being ejected from the tray head 100. The guide support 400 and the wear plate 300 also define a pathway 906 through which the railroad spikes are ejected from the tray head. An actuating device (e.g., a hydraulic single-acting actuator) that extends through a slot 402 defined by the guide support 400 is configured to actuate the railroad spike from the shelf 228 through the pathway 906 and, thus, eject the railroad spike from the tray head 100 to the actuating device that drives the railroad spike into the ground.
Overt an extending period of time, the guide support 400 may become worn down. Returning to
Further, the walls 500, 600 and the wear plates 200, 300 define the slopes of the tray head 100 that facilitate the railroad spikes in sliding from the inlet 902 to the outlet 904. As illustrated in
Turning to
Similarly, a body 318 of the wear plate 300 defines the lower surface 302, the upper surface 306, and the inner surface 310 extending between the lower surface 302 and the upper surface 306. The body 318 also defines the wear edge 312 between the upper surface 306 and the inner surface 310. The upper surface 306 and the wear edge 312 defined by the body 318 are concave to facilitate heads of railroad spikes to slide along the upper surface 306 and/or the wear edge 312 in an orderly manner. In some examples, the upper surface 306 and the wear edge 312 are curved to form the concave profile. In the illustrated example, the body 318 of the wear plate 300 defines obtuse angles 320 along the upper surface 206 and the wear edge 312 to define the concave profile. In the illustrated example, the body 318 defines an obtuse angle 320a (sometimes referred to as a first obtuse angle) that is formed between a portion 322a (sometimes referred to a first portion) and a portion 322b (sometimes referred to a second portion) of the upper surface 306 and/or the wear edge 312. The body 318 also defines an obtuse angle 320b (sometimes referred to as a second obtuse angle) that is formed between the portion 322b and a portion 322c (sometimes referred to a third portion) of the upper surface 306 and/or the wear edge 312. In other examples, the body 318 may be define more or less obtuse angles along the upper surface 306 and the wear edge 312 to define the concave profile.
To further facilitate the railroad spikes in sliding through the channel 900 of the tray head 100, the wear plates 200, 300 define the through holes 204, 304, respectively, such that the through holes 204, 304 and/or the fasteners 802 extending through the through holes 204, 304 do not interfere with the heads of the railroad spikes sliding along the wear plates 200, 300. For example, the wear plate 200 defines the through holes 204 to be located adjacent to an outer edge 224 that is opposite the wear edge 212. The through holes 204 are located away from the wear edge 212 to deter the through holes 204 from affecting movement of railroad spikes along the upper surface 206 and/or the wear edge 212. Similarly, the wear plate 300 defines the through holes 304 to be located adjacent to an outer edge 324 that is opposite the wear edge 312. The through holes 304 are located away from the wear edge 312 to deter the through holes 304 from affecting movement of railroad spikes along the upper surface 306 and/or the wear edge 312. Further, the wear plate 200 defines counterbore holes 226 that are concentrically aligned with the through holes 204 and extend from the upper surface 206 of the wear plate 200. The counterbore holes 226 are configured to house heads of the fasteners 802 received by the through holes 204 to deter the fasteners heads from extending beyond the upper surface 206 and affecting movement of railroad spikes along the upper surface 206 and/or the wear edge 212. Similarly, the wear plate 300 defines counterbore holes 326 that are concentrically aligned with the through holes 304 and extend from the upper surface 306 of the wear plate 300. The counterbore holes 326 are configured to house heads of the fasteners 802 received by the through holes 304 to deter the fasteners heads from extending beyond the upper surface 306 and affecting movement of railroad spikes along the upper surface 306 and/or the wear edge 312.
Further, the wear plate 200, 300 of the illustrated example are asymmetrical with respect to each other to further facilitate the railroad spikes in sliding between the inlet 902 and the outlet 904 in a controlled manner without jamming. For example, as illustrated in
Additionally, the wear plates 200, 300 of the illustrated example are formed of case-hardened material to deter the wear plates 200, 300 from being worn down over time by the railroad spikes. For example, the wear plates 200, 300 are formed of case-hardened steel, such as ferritic-nitrocarburized case-hardened steel. Further, the body 150 of the tray head 100, including the wall 500 and the wall 600, is formed from non-case-hardened material. For example, the body 150 is formed from low carbon steel, such as A36 steel, or other non-case-hardened material that is rigid and weldable. For example, the wear plates 200, 300 are case-hardened to increase the durability of the tray head 100, while the body 150 is not case-hardened to reduce the manufacturing costs of the tray head 100.
Over an extended period of time, portion(s) of the wear plate 200 and/or the wear plate 300 may wear down. For instance, (1) the upper surface 206, the inner surface 210, and/or the wear edge 212 of the wear plate 200 and/or (2) the upper surface 306, the inner surface 310, and/or the wear edge 312 of the wear plate 300 may wear down over time due to railroad spikes repeatedly sliding along such surface(s) and/or edge(s). The wear plates 200, 300 of the illustrated example are detachable wear plates that are configured to be replaced over time. That is, the wear plate 200 is configured be uncoupled from the wall 500 and replaced with new wear plate (e.g., a wear plate identical to that of the wear plate 200 before repeated use) if surface(s) and/or edge(s) of the wear plate 200 have worn down over time. Additionally, the wear plate 300 is configured be uncoupled from the wall 600 and replaced with new wear plate (e.g., a wear plate identical to that of the wear plate 300 before repeated use) if surface(s) and/or edge(s) of the wear plate 300 have worn down over time. Further, the wear plates 200, 300 are configured to be replaced while the body 150 of the tray head 100 remains coupled to the spike driving workhead to reduce maintenance time associated with the tray head 100. Additionally, because the wear plates 200, 300 are able to be replaced without replacing the body 150, maintenance costs associated with the tray head 100 are reduced.
In this application, the use of the disjunctive is intended to include the conjunctive. The use of definite or indefinite articles is not intended to indicate cardinality. In particular, a reference to “the” object or “a” and “an” object is intended to denote also one of a possible plurality of such objects. Further, the conjunction “or” may be used to convey features that are simultaneously present instead of mutually exclusive alternatives. In other words, the conjunction “or” should be understood to include “and/or”. The terms “includes,” “including,” and “include” are inclusive and have the same scope as “comprises,” “comprising,” and “comprise” respectively.
The above-described embodiments, and particularly any “preferred” embodiments, are possible examples of implementations and merely set forth for a clear understanding of the principles of the invention. Many variations and modifications may be made to the above-described embodiment(s) without substantially departing from the spirit and principles of the techniques described herein. All modifications are intended to be included herein within the scope of this disclosure and protected by the following claims.
This application claims the benefit of U.S. Provisional Application Ser. No. 62/833,570, filed on Apr. 12, 2019, which is incorporated by reference in its entirety.
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