An automobile hub fixture includes a fixture body and a positioning apparatus. The fixture body includes a fixed platform and a plurality of clamping claws arranged at intervals in a circumferential direction of the fixed platform. The clamping claws are configured to clamp an outer rim of a hub. The plurality of clamping claws are connected to a driving member by using a linkage, and the driving member drives the clamping claws to radially move along the fixed platform. The positioning apparatus includes a movable platform slidably connected to the clamping claws. A positioning module configured to position an inner rim or the outer rim of the hub is mounted to the movable platform. The machining device includes a fixture, a machine tool, and a minimal quantity lubrication apparatus. The production line includes a machining device, a loading system, a loading and unloading manipulator, and a catching table.

A chuck mechanism operates a piston in a cylinder tube by using action of compressed air and opens and closes, by using a rod coupled to the piston, a pair of fingers, thereby gripping work W. The locking mechanism locks the fingers at work grip positions. The locking mechanism includes a first locking member, a second locking member, and a drive device. The first locking member is displaced when the pair of fingers are opened or closed. The second locking member retains the first locking member so as to lock the fingers at the work grip positions. The drive device relatively displaces the first locking member and the second locking member to locking positions and non-locking positions.

A retention chuck for glass pipes for machines producing glass containers is provided. The retention chuck has a central supply channel for the glass pipes, a plurality of adjustable clamping jaws arranged at the lower end of the supply channel and so as to be distributed around a centerline of the channel. The spacing of the jaws from the center line of the supply channel is adjustable by an actuation element. A coupling element couples the jaws to the actuation element. Guides guide the adjustment movement of the clamping jaws perpendicularly, radially inwardly relative to the center line.

A chuck mechanism operates a piston in a cylinder tube by using action of compressed air and opens and closes, by using a rod coupled to the piston, a pair of fingers, thereby gripping work W. The locking mechanism locks the fingers at work grip positions. The locking mechanism includes a first locking member, a second locking member, and a drive device. The first locking member is displaced when the pair of fingers are opened or closed. The second locking member retains the first locking member so as to lock the fingers at the work grip positions. The drive device relatively displaces the first locking member and the second locking member to locking positions and non-locking positions.

A retention chuck for glass pipes for machines producing glass containers is provided. The retention chuck has a central supply channel for the glass pipes, a plurality of adjustable clamping jaws arranged at the lower end of the supply channel and so as to be distributed around a centerline of the channel. The spacing of the jaws from the center line of the supply channel is adjustable by an actuation element. A coupling element couples the jaws to the actuation element. Guides guide the adjustment movement of the clamping jaws perpendicularly, radially inwardly relative to the center line.

A chuck device includes a connecting mechanism and a locking mechanism, where the locking mechanism includes a driving portion, a first locking portion and a second locking portion, where the first locking portion at least partially extends into a first receiving portion; and the second locking portion is rotatably connected to the first receiving portion through a second shaft. When the locking mechanism is in a first state, the second locking portion rotates along a first direction to drive a sleeve to bias against a biasing element and release a limitation on the first locking portion.

What is shown and described is a clamping device (1) with hub centering for attachment of an automobile wheel to the shaft of a balancing machine, with a contact flange (2) with several centering elements (3) guided in a radially moveable manner on the contact flange (2) for centering engagement in a centering hole of the rim, and with a clamping sleeve (4) guided in a moveable manner axially to the contact flange (2), wherein the clamping sleeve (4) and the centering elements (3) are kinematically coupled such that an axial movement of the clamping sleeve (4) leads to a radial movement of the centering elements (3). According to the invention, a provision is made that at least one tension lever (16) connected in an articulated manner to the clamping sleeve (4) and a centering element (3) is provided for the kinematic coupling of clamping sleeve (4) and centering element (3).