1. Field of the Invention
The present invention relates generally to mine rollers, and in particular to a system for remotely disconnecting a mine roller from a tactical vehicle.
2. Prior Art
Pushed mine rollers have historically been attached to the front of tactical vehicles, which are driven along a road surface or other areas suspected of containing mines or IEDs in order to prematurely detonate the mines before they can cause serious damage to the tactical vehicles and injure personnel. For example, the mine rollers have been mounted on M1 or M60 tanks modified with permanently attached mine roller mounting kits. Wheeled tactical vehicles, such as heavily modified Humvees, are more commonly used now, in part because they are lighter and more energy efficient.
Current mine rollers are typically released from the tactical vehicles by manually pulling two steel pins having cotter pins on either end to keep the pins retained in the pad-eyes of the mine roller system. The tongue load of the mine roller system (MRS) is applied to the pins, and a forklift or crane is often required to take off the tongue load as that the pins can be pulled manually, thereby disconnecting the MRS. Often, it is necessary to disconnect the MRS after a system failure or when the MRS is damaged by a mine or IED blast. This is especially troublesome during combat operations when personnel can be exposed to extreme danger while attempting to disconnect the MRS so they can evacuate the area in the vehicle. Thus, a need has been identified for a system that would allow operators to jettison the MRS from the vehicle remotely, e.g., from inside the vehicle, without exposing the operators to potentially dangerous enemy fire.
The invention is a remote jettison disconnect system (RJDS) for a mine roller. The typical mine roller has right and left arm pairs extending rearward from the mine roller for attaching to a tactical vehicle. The RJDS comprises two major assemblies: A mine roller assembly, which is attached to the arms of the mine roller; and a tactical vehicle assembly, which is attached to the tactical vehicle.
The mine roller assembly has an elongate strength member—typically a steel tube—with a pair of connection plates mounted thereon and spaced apart at a distance substantially equal to the center-to-center distance between the right and left arm pairs of the mine roller. The connection plates have through-plate apertures, and bolts are passed through the apertures and corresponding holes on the mine roller arm pairs to form a pivoting attachment of the mine roller to the connection plates.
The mine roller assembly has a pair of hitching plates mounted on the strength member at opposite ends thereof, a pair of J-hooking plates also mounted on opposite ends of the strength member, and a pair of dual function plates also mounted on the strength member at opposite ends. The hitching plates, J-hooking plates, and dual function plates all have rearward projecting sections with tapered arches that are sized and positioned to accept a pair of shafts installed on the tactical vehicle assembly, as discussed below. The arches of all six plats are laterally aligned with each other, i.e., the lateral centerlines of their arches are co-linear, so that they all will securely mount on the parallel co-linear pair of shafts on the tactical vehicle assembly when the RJDS is assembled Each dual function plate additionally has a rearward projecting upper section having a latch pin extending laterally therefrom for engagement with either a latch or a stop on corresponding plates on the tactical vehicle assembly.
The tactical vehicle assembly also has an elongate strength member—typically a steel tube—that is approximately the same length as the mine roller assembly strength member. Mounting plates are mounted on opposite ends of the strength member and have rearward projecting sections with mounting holes for mounting the strength member to corresponding support brackets on the tactical vehicle. A pair of shaft mounting plates are mounted on opposite ends of the strength member and have forward projections with horizontal through-plate apertures to accept corresponding parallel shafts.
A tetra-function plate is mounted on one end of the tactical vehicle assembly strength member. The tetra-function plate has a sloped inward curved inversion on its forward edge that forms a stop for accepting one of the latch pins on the mine roller assembly dual function plates. The tetra-function plate also has a horizontal through-plate aperture for accepting a corresponding shaft.
A latching assembly is mounted to the tactical vehicle strength member on the end opposite from the end where the tetra-function plate is mounted. The latching assembly has a modified shaft plate mounted to the strength member. The modified shaft plate has a horizontal through-plate aperture to accept one of the shafts. An actuator mounting panel is mounted on the modified shaft plate and has a latch inversion similarly sized and laterally aligned with the curved inversion of the tetra-function plate to accept the other latch pin.
A geared inverted plate is rotatably mounted to the actuator mounting panel adjacent to the latch inversion. The geared inverted plate has a finger-like extension which covers/closes the entrance to the latch inversion (and locks the latch pin in place when the system is assembled) when the geared inverted plate is rotated in one direction, and opens the entrance to the latch inversion (allows insertion of or releases the latch pin) when the geared inverted plate is rotated in the other direction.
A wheel gear is also rotatably mounted to the actuator mounting panel so that its gear teeth engage the gear teeth of the geared inverted plate. An electric actuator is coupled to the wheel gear and causes the wheel gear to rotate in response to electrical signals from a remote control box, thereby causing the geared inverted plate to rotate and its finger-like extension to retain/release the latch pin from the latch inversion.
As referred to above, the pair of shafts are inserted into apertures in corresponding plates. Specifically, the first shaft passes through and is retained in the apertures in the forward projecting sections of the tetra-function plate and an adjacent shaft mounting plate; the second shaft passes through and is retained in the apertures in the forward projecting sections of the modified shaft plate and the other shaft mounting plate. When installed, the shafts are substantially parallel to each other and to the strength members, and they are substantially co-linear. Each of the shafts has an inboard flange and an outboard flange to retain the shafts in the apertures. Each shaft also preferably has a covering sleeve that reduces friction and wear on the shaft.
Typically, the remote control box is located within the tactical vehicle so that personnel can operate it, and, thus, control the electric actuator without exiting the vehicle to release the latch pin, thereby allowing the mine roller assembly (and an attached mine roller) to drop away from the tactical vehicle assembly under the force of gravity. In an exemplary embodiment, the remote control box is hard-wired to an electrical box which passes the control signals from the remote control box to the actuator. The electrical box also distributes electrical power from the vehicle to the actuator and also to electrical equipment on the mine roller.
When the RJDS is assembled, the laterally aligned tapered arches on the hitching plates, J-hooking plates, and dual function plates of the mine roller assembly engage and rest upon the shafts installed on the tactical vehicle assembly. One of the latch pins on a dual function plate on the mine roller assembly enters and abuts the stop formed by the sloped inward curved inversion of the tetra-function plate on the tactical vehicle assembly. The other latch pin enters the latch inversion of the actuator mounting panel, and is held therein by the finger-like extension when the curved geared plate is rotated to the closed position by the actuator.
The invention will become readily apparent by referring to the following detailed description and the appended drawings in which:
a is an enlarged view of the tactical vehicle mounting plate shown in
b is an enlarged view of the shaft mounting plate shown in
c is an enlarged view of the tetra-function plate shown in
a is a detail view of a hitching plate of the mine roller assembly illustrated in
b is a detail view of a connection plate of the mine roller assembly illustrated in
c is a detail view of a J-hooking plate of the mine roller assembly illustrated in
dis a detail view of a dual function plate of the mine roller assembly illustrated in
The invented remote jettison disconnect system (RJDS) provides in-cab release of a mine roller mounted to a tactical vehicle, thus eliminating the need for personnel to exit the vehicle and be exposed to hazardous conditions while disconnecting the mine roller. The system 10, as shown in
In the exemplary embodiment illustrated and described herein, the tactical vehicle elongate strength member 30 is a rectangular steel tube that is about three inches by about five inches, having walls with a nominal thickness of about three eighths of an inch.
Adjacent to and outboard of each tactical vehicle mounting plate 22 is a shaft mounting plate 40. Each shaft mounting plate 40 is mounted on the tactical vehicle elongate strength member 30, projecting forward, substantially horizontal to the ground. As shown in
Adjacent to and outboard of the left tactical vehicle shaft mounting plate 40 is a tetra-function plate 50. Each tetra-function plate 50 has an open base 52 for mounting on the tactical vehicle elongate strength member 30. Typically, the open base 52 is U-shaped so that the tetra-function plate 50 can drop down on the rectangular tube shaped steel beam 30. The tetra-function plate is secured with a base plate 57 that fastens the tetra-function plate to the tactical vehicle elongate strength member 30. An upper front edge portion 53 of the tetra-function plate 50 curves upward. A lower front edge portion 54 curves downward, forming a sloped inward curved inversion 56 with an open forward portion. The inversion 56 functions as a stop for the outward depending heavy duty latch pin 162 on a dual function plate 160 on the mine roller assembly 120. A lower front edge portion 58 of the tetra-function plate 50 has a through-plate aperture 59 for receiving and supporting a shaft 60. The middle 55 and upper 51 portions of the tetra-function plate 50 are normally used to mount an electrical box mounting plate 72 (see
The electrical box mounting plate 72 supports the electrical box 76 which is in communication with the remote control box 74 and the actuator 91. The control box 74 is typically located inside the cab of the tactical vehicle (not shown for clarity of illustration) and controls the actuator 91, via connections with the electrical box 76, to provide in-cab release of the mine roller assembly, thus eliminating the need for personnel to exit the tactical vehicle. The electrical box 76 effectively functions as a junction bow. It receives power from the tactical vehicle, distributes power to the actuator 91 as well as to the electronics on the mine roller itself, and distributes signals between the control box 74 and actuator 91.
As shown in
The shaft 60 is supported by a lower portion 88 of the modified shaft plate 80 having a through-plate aperture 89 for receiving and supporting the shaft. An entering upper portion 83 of panel 85 of inversion 96 is curved and sloped upward and lower portion 84 is curved and sloped downward. Similarly, an entering upper portion 83′ of plate 85′ of inversion 96′ is curved and sloped upward and lower portion 84′ is curved and sloped downward. The combined effect is that when the finger-like extension 97 is closed, resting on a stop bolt 81, the latch pin 162′ of mine roller assembly 120 will be snugly held by the latch 97. When the finger-like extension 97 is retracted, the latch pin 162′, under the gravitational force of the tongue pressure of the mine roller, will rotate and be jettisoned from the latch.
Each shaft 60, as shown in
In
As illustrated in
In the exemplary embodiment, the elongate strength member 130 is a rectangular steel tube that is about three inches by about five inches, having a nominal wall thickness of about three eights of an inch. The elongate strength member 130 is at least as long as the distance separating the left pair of arms 202 and the right pair of arms 202′.
Each of the connection plates 122,122′ are flanked outboard by hitching plates 140,140′, respectively. Each hitching plate 140,140′ is mounted to the elongate strength member 130, such that a hitching projection section 140P (see
Each of the connection plates 122,122′ are also preferably flanked in-board by J-hooking plates 150,150′, respectively. Each J-Hooking plate 150,150′ is welded to the elongate strength member 130 (shown in ghost with dashed lines in
In addition to the hitching plates 140′ and the J-hooking plates 150′ proximate to the right end of the mine roller elongate strength member 130, and the hitching plate 140 and the J-hooking plates 150 proximate to the left end of the mine roller elongate strength member 130, there is a pair of dual function plates 160,160′ located inboard of J-hooking plates 150,150′, respectively. As identified in
In the hitched position, the latch is closed, and the elongate strength members on both assemblies are about at the same height and the heavy duty latch pins 162,162′ are substantially parallel and directly above the corresponding shaft 60 on the tactical vehicle assembly 20. When latched, the mine roller assembly has a fixed position, and unlike a ball hitch where there can be wide horizontal rotational movement and some vertical rotational movement, all movement is locked out. The only movement that is allowed is at the pivot point between the mine roller assembly and the left pair of arms 202 and the right pair of arms 202′, where both pairs of arms are equally spaced and parallel, and both pairs have opposing pairs of connection holes 204,204′ that function substantially as horizontal bearings. Each pair of arms 202,202′ is connected to a corresponding connection plate 122,122′ on the mine roller assembly 120 using a heavy duty axle bolt 124,124′ that can be secured, for example with an axial pin having a handle 126,126′ that permits vertical rotational movement of the mine roller.
When assembled and in operation, the tactical vehicle assembly 20 is typically mounted to the front of a tactical vehicle by mounting plates 22,22′ so that the strength member 30 and shafts 60 are substantially parallel to the ground surface. The mine roller assembly 120 is attached to the tactical vehicle assembly 20 by placing the tapered arches 140S, 150S and 160S of the hitching plates 140,140′, J-hooking plates 150,150′ and dual function plates 160,160′, respectively, over corresponding exposed portions of the shafts 60.
When the mine roller assembly 120 is rotated and positioned so that the plates 140,140′, 150,150′, 160,160′ are substantially parallel to the ground and the tapered arches 140S, 150S, and 160S are facing downward, the shafts 60 support the weight of the mine roller assembly. Also when the mine roller assembly 120 is in this position, latch pin 162 is disposed within and abuts against the stop of inversion 56 of the tetra-function plate 50 and the other latch pin 162′ is disposed within latch inversion 96 of the latching assembly 90.
When an operator activates the actuator 91 via remote control 74 to rotate geared curved plate 94 so that the finger-like extension 97 moves into the closed position (as illustrated in
When it becomes necessary to release the mine roller—and the attached mine roller assembly 120—from the tactical vehicle, the operator simply uses the remote control 74 to activate the actuator 81 to rotate the geared curved plate 94 so that the finger-like extension 97 moves into the open position (i.e., so that it does not block the entrance of latch inversion 96). When this occurs, latch pin 162′ is released, allowing the mine roller assembly 120 to rotate and pivot about the bolts 124,124′ and the shafts 60 so that the plates 140,140′, 150,150′, and 160,160′ can rotate downward under the influence of the tongue weight of the mine roller into a substantially vertical position and the tapered arches 140S, 150S, and 160S can fall away from the shafts 60, thereby releasing the mine roller assembly 120 from the tactical vehicle assembly. Thus unencumbered by the mine roller, the tactical vehicle can evacuate the area, for example in an emergency situation.
It is to be understood that the foregoing description and specific embodiments are merely illustrative of the best mode of the invention and the principles thereof, and that various modifications and additions may be made to the invention by those skilled in the art without departing from the spirit and scope of this invention. For example, the elongate strength members can be other than rectangular tubes and can be made of a material other than steel. Additional plates can be added to the strength members to provide additional supporting structure, or one or more of the disclosed plates, such as the J-hooking plate, may be omitted to save weight as long as there is sufficient supporting structure to support the weight of the mine roller and maintain the mine roller assembly's position and attachment to the tactical vehicle assembly.
The invention described herein may be manufactured and used by or for the Government of the United States of America for Governmental purposes without the payment of any royalties.
Number | Name | Date | Kind |
---|---|---|---|
4723473 | Grinwald | Feb 1988 | A |
6026135 | McFee et al. | Feb 2000 | A |
6333631 | Das et al. | Dec 2001 | B1 |
6619177 | Hansen et al. | Sep 2003 | B1 |
20020017040 | French | Feb 2002 | A1 |