Connector connecting bolt, connector and connector assembly

摘要

A bolt (10) includes a flange (14) that bulges radially out near a head (12) at one axial end. The flange (14) contacts a second connector (60) at a proper connection to prevent further tightening. A stepped recess (16) is located between the head (12) and a screw portion (13), and is recessed sufficiently to fracture when an excessive tightening torque is applied. A retaining groove (18) is located between the stepped recess (16) and the screw portion (13) and is recessed radially inwardly and receives a retaining ring (80) for preventing detachment of the bolt (10) from a first connector (40) by contacting the first connector (40) before connection. Seal grooves (15) are located between the stepped recess (16) and the flange (14) for receiving seals (30) to be held in close contact with the first connector (40) in a liquid-tight manner at the time of proper connection.

主权项

1. Connector connecting bolts, each of the connector connecting bolts being mountable in a first connector and being connectable to a mating second connector, each of the connector connecting bolts comprising:
a head at or near a first axial end part; a screw portion at or near a second axial end part spaced from the first axial end part in an axial direction of the connector connecting bolt; a flange bulging radially out adjacent to the head and being engageable with the first connector when properly connected to prevent any further tightening of the bolt; at least one stepped recess between the first axial end part and the screw portion, and being recessed radially inwardly a sufficient amount to be fractured when an excessive tightening torque is applied; at least one retaining groove between the stepped recess and the screw portion in an axial direction and recessed radially inward for receiving a retaining member that contacts the first connector before connection of the first and second connectors for preventing detachment of the bolt from the first connector; and at least one seal groove between the stepped recess and the flange in the axial direction and recessed radially inward for receiving at least one seal to be held in close contact with the first connector in a fluid-tight manner at the time of proper connection, wherein a thickness of the flange in the axial direction is larger than a width of the seal groove in the axial direction so that the flange of one of the bolts is not insertable into the seal groove of another of the bolts for preventing damage to the seal groove.