초록 ▼

A pneumatically driven clamping device, in particular a machine vice, has a clamping member movable in the clamping direction in a stationary housing and an adjusting arrangement for coarse adjustment of the clamping member in the clamping direction with respect to the stationary housing. Between th

A pneumatically driven clamping device, in particular a machine vice, has a clamping member movable in the clamping direction in a stationary housing and an adjusting arrangement for coarse adjustment of the clamping member in the clamping direction with respect to the stationary housing. Between the adjusting arrangement and the clamping member in a drive housing there is provided a power amplifier with a primary element to which pneumatic pressure can be admitted, an abutment provided at one end of the power amplifier and connected to the adjusting arrangement, and a secondary element movable in the clamping direction at the other end of the power amplifier and acting on the clamping member. In the drive housing a wedge is provided which is movable transversely of the clamping direction of the power amplifier, is disposed between the secondary element of the power amplifier or its abutment and the respectively adjoining part to separate them in the clamping direction and is driven by a pneumatic piston and cylinder unit whose pressure chamber is connected in series with the pressure chamber of the primary drive element via a connecting duct and an adjustable excess-pressure valve arranged in this duct.

대표청구항 ▼

A fluid actuated clamping device, comprising a base, a clamping member supported for movement relative to said base in a first direction and having a first surface thereon, an element supported for movement in said first direction independently of said base and clamping member and having a second su

A fluid actuated clamping device, comprising a base, a clamping member supported for movement relative to said base in a first direction and having a first surface thereon, an element supported for movement in said first direction independently of said base and clamping member and having a second surface thereon, a wedge supported for movement in a second direction transverse to said first direction and having third and fourth surfaces thereon which converge substantially in said second direction and which respectively slidably engage said first and second surfaces, first fluid actuated means for effecting movement of said wedge in said second direction, power amplifier means cooperable with said base and said element for causing movement of said element relative to said base in said first direction, second fluid actuated means for actuating said power amplifier means, means for selectively supplying a pressurized fluid to said first fluid actuated means, means defining a connecting duct for supplying said pressurized fluid from said first fluid actuated means to said second fluid actuated means, and excess pressure valve means disposed in said connecting duct for obstructing fluid flow therethrough until said pressurized fluid supplied to said first fluid actuated means exceeds a predetermined value.