Encapsulated bearing block design for adjustable hook latch
A latch mechanism includes a hook body having a hook body load bearing plate; a hook mechanism, the hook mechanism having a hook with a threaded shaft, the shaft defining a longitudinal axis with respect to the hook body; an adjustment mechanism configured to adjust an axial position of the hook with respect to the hook body; and a bearing block, the bearing block having a block load bearing plate disposed between the adjustment mechanism and the hook body load bearing plate, the bearing block including a first boss configured for engagement with the adjustment mechanism, a second boss configured for engagement with the hook body plate aperture, an inner diameter hole that allows the hook shaft threads to engage with the adjustment mechanism but provides suitable clearance within the second boss inner diameter to prevent the hook shaft threads from bearing out as required in Aerospace design.
1. A latch mechanism, comprising:
a hook body, the hook body having a hook body load bearing plate;
a hook mechanism, the hook mechanism having a hook and a shaft connected to the hook, the shaft defining a longitudinal axis with respect to the hook body;
an adjustment mechanism configured to adjust an axial position of the hook with respect to the hook body; and
a bearing block, the bearing block having a block load bearing plate disposed between the adjustment mechanism and the hook body load bearing plate, the bearing block including a first boss configured for engagement with the adjustment mechanism;
wherein the bearing block further comprises the first boss at an aft location configured to engage a recess that extends in an axial direction along the longitudinal axis into a first side of an adjustment nut of the adjustment mechanism and a second boss at a forward location configured to engage a plate aperture that extends axially through the hook body load bearing plate of the hook body;
wherein the adjustment mechanism is locked or maintained in a position by a lock mechanism defined by a protrusion and an aperture with respect to the bearing block and that selectively prevents rotation of the adjustment nut about the longitudinal axis wherein a sliding-fit tolerance between an inner diameter of the recess and an outer diameter of the first boss permits a set of associated components comprising the bearing block and the adjustment nut to remain tightly and precisely aligned in the axial direction along the longitudinal axis with minimal ability to move with respect to one another in a lateral direction with respect to the longitudinal axis.
2. The latch mechanism of claim 1 , wherein the hook body includes a plate aperture that extends in the axial direction through the hook body load bearing plate.
3. The latch mechanism of claim 2 , wherein the bearing block includes the second boss configured for engagement with the plate aperture.
4. The latch mechanism of claim 3 , wherein the second boss defines a second boss outer diameter, and the plate aperture defines a plate aperture inner diameter, the plate aperture inner diameter being within a press-fit tolerance of the second boss outer diameter.
5. The latch mechanism of claim 4 , wherein the press-fit tolerance is between one or two thousandths of an inch.
6. The latch mechanism of claim 1 , wherein the first boss is configured to engage the recess within the adjustment mechanism.
7. The latch mechanism of claim 6 , wherein the adjustment mechanism includes the adjustment nut configured for threaded engagement with the shaft.
8. The latch mechanism of claim 7 , wherein the bearing block includes the second boss, the second boss defining a second boss inner diameter and wherein the shaft defines a shaft outer diameter, the shaft outer diameter being within the sliding-fit tolerance of the second boss inner diameter.
9. The latch mechanism of claim 8 , wherein the sliding tolerance is between five and ten thousandths of an inch.
10. The latch mechanism of claim 8 , wherein the adjustment mechanism and the block load bearing plate are configured to provide the lock mechanism wherein the lock mechanism being configured to prevent rotation of the adjustment mechanism about the longitudinal axis.
11. A latch mechanism for an aircraft panel, comprising:
a hook body, the hook body including a plurality of longitudinal members, each of the plurality of longitudinal members extending in an axial direction with respect to the hook body, the hook body further having a hook body load bearing plate connected to the plurality of longitudinal members and being oriented perpendicular to the axial direction;
a hook mechanism, the hook mechanism having a hook and a shaft connected to the hook, the shaft extending in the axial direction with respect to the hook body;
an adjustment mechanism configured to adjust an axial position of the hook with respect to the hook body; and
a bearing block, the bearing block having a block load bearing plate disposed between the adjustment mechanism and the hook body load bearing plate;
wherein the bearing block further comprises a first boss at an aft location configured to engage a recess that extends in the axial direction along a longitudinal axis into a first side of an adjustment nut of the adjustment mechanism and a second boss at a forward location configured to engage a plate aperture that extends axially through the hook body load bearing plate of the hook body;
wherein the adjustment mechanism is locked or maintained in a position by a lock mechanism defined by a protrusion and an aperture with respect to the bearing block and that selectively prevents rotation of the adjustment nut about the longitudinal axis wherein a sliding-fit tolerance between an inner diameter of the recess and an outer diameter of the first boss permits a set of associated components comprising the bearing block and the adjustment nut to remain tightly and precisely aligned in the axial direction along the longitudinal axis with minimal ability to move with respect to one another in a lateral direction with respect to the longitudinal axis.
12. The latch mechanism of claim 11 , wherein the hook body includes a plate aperture that extends in the axial direction through the hook body load bearing plate.
13. The latch mechanism of claim 12 , wherein the bearing block includes a first boss comprising an aft boss configured to engage the recess that extends axially into the first side of the adjustment nut.
14. The latch mechanism of claim 13 , wherein the first boss defines a first boss outer diameter configured to engage an interior surface of the recess of the adjustment nut and the plate aperture defines a plate aperture inner diameter, wherein the plate aperture inner diameter and the outer diameter of the second boss define a press-fit tolerance.
15. The latch mechanism of claim 14 , wherein the press-fit tolerance is between one or two thousandths of an inch.
16. The latch mechanism of claim 15 , wherein the bearing block includes the second boss configured for engagement with the adjustment mechanism.
17. The latch mechanism of claim 16 , wherein the adjustment mechanism includes an adjustment nut configured for threaded engagement with the shaft.
18. The latch mechanism of claim 17 , wherein the first boss defines a first boss inner diameter, and the shaft defines a shaft outer diameter, the shaft outer diameter being within the sliding-fit tolerance of the first boss inner diameter.
19. The latch mechanism of claim 18 , wherein the sliding tolerance is between five and ten thousandths of an inch.
20. The latch mechanism of claim 19 , wherein the adjustment mechanism and the block load bearing plate are configured to provide a lock mechanism, the lock mechanism being configured to prevent rotation of the adjustment mechanism about the axial direction.