ELEVATION MAST ASSEMBLY Flashcards
(15 cards)
Elevation Mast Assembly: 12 Major Assemblies
- Telescopic Mast
- Interface Plate
- Adapter Plate Assembly
- Mast Harness Connectors
- Mast Protection Cover (MPC)
- Turret Drive Lock
- Locking Handles
- Slip Ring
- Elevation Drive Assembly (EDA)
- Mast Retainer Assembly
- Lower Mast Assembly
- Mast Switches and Harness
Telescopic Mast
(Upper Mast section)
The Telescopic Mast can be raised and lowered either electronically or manually. For mission critical protection, the mast harnesses are protected inside the telescopic mast in an armor tube assembly. The elevation nut and spindle shaft are lubricated through a grease fittings next to the mast harness connectors.
Mast Protection Cover (MPC)
The MPC provides added environmental protection and sealing for the telescopic mast and the inside of the vehicle against NBC attacks.
Interface Plate (Roof Flange)
The Interface Plate provides a mounting facility from the outside edge to the vehicle roof and from the inside edge to the ring bearing. The interface plate is armor steel complete with spall liner on the inside.
Adapter Plate Assembly
The Adapter Plate Assembly allows easy access to inside of upper mast section, spindle retainer lubrication, and provides electrical connection between all platform components and cable assemblies during full traverse of Elevating Mast. The Adapter Plate Assembly is the interface that allows the Elevated TOW System to be mounted to the Telescopic Mast
Mast Harness Connectors
The Mast Harness Connectors provide the electrical connections necessary to supply the proper voltage and electrical signals to operate Elevated TOW Assembly.
Turret Drive Lock
The Turret Drive Lock engages the ring bearing to lock the mast in azimuth position when set to LOCKED. When set to UNLOCKED it allows the turret to traverse by power or manual drive. The Turret Drive Lock must be in the “Locked” position prior to the raising or lowering of the ETS.
Interior Mast: Interior Mast
The Lower Mast Assembly provides housing for the electrical connections, inspection hatches allowing access to the internal components to perform inspections and maintenance, mount supports for the Locking Handles, and including the ring bearing which is the main bearing between upper chassis hull and elevating mast.
Interior Mast: Mast Switches and Harness
The Mast Switches and Harness assembly have two limit switches that provide signals for upper and lower mas position. A wire harness goes through right-hand inspection hatch and connects to the slip ring.
Interior Mast: Slip Ring
The Slip Ring provides the capability of supplying the Elevated TOW System with VOLTAGE, ELECTRICAL and VIDEO connections from the chassis to the components located in the in the ETS platform while allowing the ETS to rotate a full 360°.
Interior Mast: Locking Handles
The Locking Handles, when mast is in operating position, handles are used to lock and support ETS and to prevent backlash against lower mast when preloading the telescopic mast. The locking handle is preloaded by a hand wheel and secured by a safety pin once completely tightened. (three in total)
Mast Retainer Assembly
The Mast Retainer Assembly is located inside the bottom section of the Upper Mast Assembly. It is the internal component which connects the Upper Mast Assembly to the Lower Mast Assembly. It is also functions as the internal component where the locking handles support the Upper Mast Assembly when it is in the raised position.
Elevation Drive Assembly (EDA)
The Elevation Drive Assembly consists of a 170 Vdc motor connected to a gearbox with a tooth belt pulley.
The spindle shaft is driven by the belt to provide vertical movement of the telescopic mast section. The gearbox has a second output providing an option for manual drive using a wrench ratchet. The motor and gearbox mount assembly can be adjusted to position the pulley for correct belt alignment. The mount has a self-adjusting belt tensioner.
