A method of maintaining first and second objects in a desired relationship. The method involves obtaining a fastener having a body with an elongate shank. The body has a head with a blocking surface. The shank is configured to engage a surrounding bore surface on or associated with at least one of the first and second objects to cause the shank to advance axially in a tightening direction while turned in one direction. The fastener body is engaged at a location spaced from the head to turn the shank in the one direction, thereby causing the shank to draw the head so as to move the blocking surface on the head towards a selected holding position relative to one of the first and second objects wherein the fastener is in a fastened state. The invention is also directed to the fastener construction.

An apparatus including a threaded member having a head, a shaft extending away from the head, threads disposed on at least a portion of the shaft, and a tip opposite the head. The head, tip, shaft, and threads are sized to pass through a hole in a structure such that the threaded member may be inserted into the structure. The apparatus further includes a tool for mounting to the threaded member that extends out of out the hole when the threaded member is located within the structure. The tool includes a connector that mounts to the tip of the threaded member and a flexible member that extends away from the connector and out of the hole when the threaded member is located within the structure.

The present application relates to the field of swapping batteries of electric vehicles, particularly to a quick locking-unlocking assembly. The present application aims at solving the problem in the prior art that each locking mechanism of current electric vehicle power battery has too many parts and sophisticated structure, occupying larger space and thus increasing cost in manufacturing the electric vehicles. The quick locking-unlocking assembly of the application includes: a first sliding block and a second sliding block slidably connected to the electric vehicle body, a retaining sheath fixed to the outer shell of the power battery, a first spring and a second spring for forcing the first and second sliding blocks to move closer to each other, a bolt capable of extending through the retaining sheath and the first and second sliding blocks, and a third spring forcing the bolt away from the vehicle body. Further, the bolt is provided with a cam, by rotating which the first and second sliding blocks are forced to separate away from each other. Thus, the bolt is able to leave the electric vehicle under effect of the third spring. Accordingly, the quick locking-unlocking assembly of the present application is simple in structure and convenient in operation.

An engine assembly for use with a gas turbine engine includes a first component, a second component, and a retention locking plug. The first component is formed to define a passage that extends into the first component. The second component is received in the passage defined in the first component. The retention locking plug extends into the first component and the second component to couple the second component with the first component.

A method of aligning a first body and a second body of a structure comprises orienting the first body so that first openings extend vertically and inserting indexing pins into the first openings. The method comprises orienting the second body so that the second openings extend vertically and aligning the second openings with the indexing pins. The method comprises moving the first body and the second body toward each other, while: allowing the first body and the second body to move relative to each other and applying a downward force to the indexing pins. The method comprises moving the first body and the second body toward each other until a first-body second surface contacts a second-body first surface, while applying the downward force to the indexing pins.

An apparatus for creating holes in a workpiece includes a knockout punch tool having a movable piston. The apparatus also includes a draw stud assembly having a connector attachable to the movable piston, a draw stud, and a quick connect mechanism including mating first and second thread segments on the connector and the draw stud, respectively. The connector and the draw stud are movable between a first relative orientation where the mating first and second thread segments are misaligned to permit axial movement between the connector and the draw stud, and a second relative orientation where the mating first and second thread segments are aligned and engaged to inhibit axial movement between the connector and the draw stud.

A method of aligning a first body and a second body of a structure comprises orienting the second body so that second openings extend vertically and orienting the first body so that first openings extend vertically. The method comprises aligning the first openings with the second openings so that a circumferentially closed contour, formed by each one of the first openings and a corresponding one of the second openings is large enough to receive a threaded portion of any one of the indexing pins with a clearance fit. The method comprises moving the first body and the second body toward each other and inserting the indexing pins into the first openings. The method comprises applying a downward force on the indexing pins, while allowing the first body and the second body to move relative to each other.

A display device including a frame, a pushing piece and a substrate is provided. The frame has a supporting platform and a through hole, and the supporting platform has a supporting surface, and the through hole penetrates through the supporting platform from the supporting surface. The pushing piece having a pushing surface is movably installed in the through hole. The pushing surface is close to the supporting surface while the pushing piece is in the through hole. The substrate is installed on the frame to cover the pushing surface and be connected to the supporting surface. When the pushing piece moves relatively to the through hole and protrudes from the supporting surface, the pushing surface pushes the substrate and separates the substrate from the supporting surface.

A method (1000) of aligning a first body (302) and a second body (304) of a structure (300) comprises: preparing indexing pins (100); orienting the first body (302) so that first openings (306) extend vertically; inserting the indexing pins (100) into the first openings (306); orienting the second body (304) so that the second openings (308) extend vertically; and aligning the second openings (308) with the indexing pins (100). The method (1000) also comprises: moving the first body (302) and the second body (304) toward each other, while: allowing the first body (302) and the second body (304) to move relative to each other and applying a downward force to the indexing pins (100). The method (1000) additionally comprises moving the first body (302) and the second body (304) toward each other until a first-body second surface (334) contacts a second-body first surface (332), while applying the downward force to the indexing pins (100).

A method (2000) of aligning a first body (302) and a second body (304) of a structure (300) comprises: preparing indexing pins (100); orienting the second body (304) so that second openings (308) extend vertically; orienting the first body (302) so that first openings (306) extend vertically; and aligning the first openings (306) with the second openings (308) so that a circumferentially closed contour (342), formed by each one of the first openings (306) and a corresponding one of the second openings (308) is large enough to receive a threaded portion (126) of any one of the indexing pins (100) with a clearance fit. The method (2000) further comprises: moving the first body (302) and the second body (304) toward each other; inserting the indexing pins (100) into the first openings (306); and applying a downward force on the indexing pins (100), while allowing the first body (302) and the second body (304) to move relative to each other.