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US 11,786,978 B2Granted
Hydraulic expanding chuck
AssigneeGuehring KG
InventorsBruno Teusch, Klaus Matheis
Life of this patent
Estimating the term…
Abstract
The invention relates to a hydraulic expanding chuck for gripping a tool, for example a drill or a milling tool, comprising: a clamping part having an expansion sleeve having a central receiving opening for receiving and clamping the tool; and a connection part, in particular having a HSK connection. According to the invention, the expansion sleeve has at least two pressure chambers, which are designed to run around the central receiving opening, which are arranged at an axial distance relative to one another, and which can bulge when the tool received in the central receiving opening is subjected to fluid pressure. The at least two pressure chambers are connected to one another by a fluid channel.
Claims19
A hydraulic expanding chuck for clamping a tool, the chuck comprising:
- an expanding bush, which comprises a centric receiving opening for receiving and clamping the tool, and
- a connecting part,
- the expanding bush comprising at least first and second pressure chambers, the first and second pressure chambers each annularly formed about the centric receiving opening, the first and second pressure chambers arranged at an axial distance from one another, and the first and second pressure chambers, when subjected to a pressure, can bulge out against a tool received in the centric receiving opening,
- the first and second pressure chambers are connected with one another by at least a first passage that is non-annular,
- a feed line is connected to the first pressure chamber and is indirectly connected to the second pressure chamber via the first pressure chamber,
- the expanding bush is a one-piece integral structure that defines the first and second pressure chambers, the first passage, and the feed line,
- the feed line extends from a first location, where the feed line connects to the first pressure chamber, to a second location,
- the first location is spaced axially a first distance from the second pressure chamber, the second location is spaced axially a second distance from the second pressure chamber, the second distance is larger than the first distance, the first location is spaced radially a third distance from an axis of the centric receiving opening, the second location is spaced radially a fourth distance from the axis of the centric receiving opening, the fourth distance is larger than the third distance, and the feed line has a substantially constant rate of taper from the first location to the second location.
5 more elements
A hydraulic expanding chuck for clamping a tool, the chuck comprising:
- an expanding bush, which comprises a centric receiving opening for receiving and clamping the tool,
- a connecting part,
- a setscrew,
- a sleeve-shaped screw element, and
- a sleeve-shaped elastic support element,
- the expanding bush comprising at least first and second pressure chambers, the first and second pressure chambers each annularly formed about the centric receiving opening, the first and second pressure chambers arranged at an axial distance from one another, and the first and second pressure chambers, when subjected to a pressure, can bulge out against a tool received in the centric receiving opening,
- the first and second pressure chambers are connected with one another by at least a first passage that is non-annular,
- a feed line is connected to the first pressure chamber and is indirectly connected to the second pressure chamber via the first pressure chamber,
- the expanding bush is a one-piece integral structure that defines the first pressure chamber, the first passage and the second pressure chamber,
- the feed line extends from a first location, where the feed line connects to the first pressure chamber, to a second location,
- the first location is at an axial extremity of the first pressure chamber, remote from the second pressure chamber,
- the first location is spaced a first distance from an axis of the centric receiving opening, the second location is spaced axially a second distance from the axis of the centric receiving opening, and the second distance is larger than the first distance,
- the setscrew forms a first axial stop for a tool to be clamped in the expanding bush, and
- the sleeve-shaped screw element pushes the sleeve-shaped elastic support element against the expanding bush.
11 more elements
A hydraulic expanding chuck for clamping a tool, the chuck comprising:
- an expanding bush, which comprises a centric receiving opening for receiving and clamping the tool,
- a connecting part, and
- a setscrew,
- the expanding bush comprising at least first and second pressure chambers, the first and second pressure chambers each annularly formed about the centric receiving opening, the first and second pressure chambers arranged at an axial distance from one another, and the first and second pressure chambers, when subjected to a pressure, can bulge out against a tool received in the centric receiving opening,
- the first and second pressure chambers are connected with one another by at least a first passage that is non-annular,
- a feed line is connected to the first pressure chamber and is indirectly connected to the second pressure chamber via the first pressure chamber,
- the expanding bush is a one-piece integral structure that defines the first pressure chamber, the first passage and the second pressure chamber,
- the feed line extends from a first location, where the feed line connects to the first pressure chamber, to a second location,
- the first location is at an axial extremity of the first pressure chamber, remote from the second pressure chamber,
- the first location is spaced a first distance from an axis of the centric receiving opening, the second location is spaced axially a second distance from the axis of the centric receiving opening, and the second distance is larger than the first distance,
- the setscrew forms an axial stop for a tool to be clamped in the expanding bush, and
- the setscrew can be actuated from the side of the connecting part.
9 more elements
Dependencies are inferred from the claim text.