Latching separation system
Latching elements on a first structure are configured to securely engage corresponding bearings on a second structure, via a lateral member that drives all of the latching elements simultaneously. When engaged, or when disengaged, the system is in a stable state, requiring no active force by the controlling system to maintain the system in each state. Preferably, each latching element is coupled to the lateral member via a pinion that provides a mechanical advantage that substantially reduces the force required on the lateral member to effect the coupling or decoupling. Also preferably, the elements are formed from extruded aluminum forms, thereby providing for a relatively inexpensive and lightweight configuration that is particularly well suited for spacecraft applications.
1. A coupling device for coupling a first element to a second element, comprising:
a first structure that is configured to be attached to the first element, and includes a plurality of transverse-mounted bearings;
a second structure that is configured to be attached to the second element, and includes:
a plurality of latch elements that are configured to engage the plurality of bearings via a rotation of the latch elements,
a lateral member that is configured to provide the rotation of the latch elements via a lateral movement of the lateral member, and
a plurality of pinions that are each configured to couple each corresponding latch element to the lateral member, to facilitate the rotation of each latch element,
wherein each latch element of the plurality of latch elements includes a hook element that is configured to engage a corresponding bearing of the plurality of bearings and to apply a force that draws the first structure toward the second structure during the rotation of the latch element; and
wherein each pinion includes a tang that engages an adjacent latch element to urge the adjacent latch element toward a latch position during the lateral movement of the lateral member.
2. The coupling device of claim 1 , wherein each pinion of the plurality of pinions is pivoted about a bearing mounted on the second structure.
3. The coupling device of claim 2 , wherein:
the lateral member includes a first gear surface, and
each pinion includes a second gear surface that is configured to engage the first gear surface, to thereby provide a rotation of the pinion during the lateral movement of the lateral member.
4. The coupling device of claim 2 , wherein each pinion is coupled to each corresponding latch element by a roller bearing.
5. The coupling device of claim 1 , wherein the latch elements are configured such that, upon coupling with the bearings, lateral forces on the lateral member are substantially nil.
6. The coupling device of claim 1 , wherein
the first and second structures each include two lateral side walls,
the bearings extend between the side walls of the first structure,
the latch elements and the lateral member are contained within the side walls of the second structure, and
the side walls of the first structure abut the side walls of the second structure when the latch elements are coupled with the bearings.
7. The coupling device of claim 6 , wherein the side walls of the first structure and the side walls of the second structure are joined in compression when the latch elements are coupled with the bearings.
8. The coupling device of claim 1 , wherein the second structure includes a ball-bearing track within which the lateral member travels.
9. The coupling device of claim 1 , including a motor assembly that is configured to provide the lateral movement to the lateral member.
10. The coupling device of claim 9 , wherein the motor assembly includes:
one or motors that are configured to turn a ball screw; and
a ball nut assembly, rotatably attached to the ball screw, that is coupled to the lateral member by a link element, and is configured to extend the link element to provide the lateral movement as the ball screw is turned.
11. The coupling device of claim 1 , wherein the latch elements and the bearings are configured so as to facilitate alignment of the first and second elements as the latch elements are engaged with the bearings.
12. A system comprising:
a first element that includes a first structure that includes a plurality of transverse-mounted bearings;
a second element that includes a second structure that includes:
a plurality of latch elements that are configured to engage the plurality of bearings via a rotation of the latch elements,
a lateral member that is configured to provide the rotation of the latch elements via a lateral movement of the lateral member, and
a plurality of pinions that are each configured to couple each corresponding latch element to the lateral member, to facilitate the rotation of each latch element,
wherein each latch element of the plurality of latch elements includes a hook element that is configured to engage a corresponding bearing of the plurality of bearings and to apply a force that draws the first structure toward the second structure during the rotation of the latch element; and
wherein the first and second elements include one of:
a spacecraft and a launch vehicle;
two stages of a launch vehicle;
two halves of a launch vehicle's fairings;
two modules of a space station;
two sections of a payload; and
two sections of a fuselage.
13. The system of claim 12 , wherein each pinion of the plurality of pinions is pivoted about a bearing mounted on the second structure.
14. The system of claim 13 , wherein:
the lateral member includes a first gear surface, and
each pinion includes a second gear surface that is configured to engage the first gear surface, to thereby provide a rotation of the pinion during the lateral movement of the lateral member.
15. The system of claim 13 , wherein each pinion is coupled to each corresponding latch element by a roller bearing.
16. The system of claim 12 , wherein each pinion includes a tang that is configured to urge an adjacent latch element toward a latch position during the lateral movement of the lateral member.
17. The system of claim 12 , wherein
each of the first and second structures includes two lateral side walls,
the bearings extend between the side walls of the first structure,
the latch elements and the lateral member are contained within the side walls of the second structure, and
the side walls of the first structure abut the side walls of the second structure when the latch elements are coupled with the bearings.
18. The system of claim 17 , wherein the side walls of the first structure and the side walls of the second structure are joined in compression when the latch elements are coupled with the bearings.
19. The system of claim 12 , further including a motor assembly that is configured to provide the lateral movement to the lateral member.
20. The system of claim 19 , wherein the motor assembly includes:
one or motors that are configured to turn a ball screw; and
a ball nut assembly that is coupled to the lateral member by a link element, and is configured to extend the link element to provide the lateral movement as the ball screw is turned.