A chuck for a machine tool includes a body rotatable about a rotation axis and defining a plurality of slots extending radially in the body, a plurality of jaws received in corresponding ones of the plurality of slots, the jaws being radially movable relative to the body between an inward position and an outward position, and for at least one of the plurality of jaws, a sealing layer disposed in the slot receiving the at least one of the plurality of jaws and sealing an interface between opposed lateral sides of the at least one jaw and a surface of the body defining the slot receiving the at least one of the plurality of jaws. A method of sealing an interface between a surface defining a slot of a chuck is also described.

Tool fitting device for a power tool, in particular a chipping hammer, including—a holding device for receiving and holding a tool shank, a retention element extending at least around a section or sections of the holding device, and a dust protection device for preventing the penetration of dust into the tool fitting device. The dust protection device includes at least one first dust stripping element, at least one fixing bead, and at least one sealing lip element, wherein the sealing lip element is positioned in front of the retention element in the axial direction. Dust protection device for use in a tool fitting device.

A protective device is provided that covers a drill chuck to protect it from dust or debris that may be released when a material is being drilled. The protective device has a mixed gasket comprising two sheets with fins that in their central part have independent movement where both are perforated (female type), while the other sheet contains caps (males) that are joined for better manufacturing, wherein said males are long so that they pierce the female holes and embed themselves in a base that is located directly in the protective device, allowing its adequate fastening.

The invention relates to a spindle (1) of a machine tool, in particular a machine tool for machining workpieces, as well as to other components of a machine tool for in particular automatedly maintaining and cleaning collet chucks. To this end, the spindle (1) has a connecting plate (100) for connecting the spindle (1) to a compressed air unit and a lubricant supply of a machine tool, a shank element (110) that can be displaced in the longitudinal direction (L) of the spindle (1) and is mounted in the connecting plate (100) of the spindle (1), as well as a spindle shank (121) that can be rotated in the circumferential direction (U) of the spindle (1), with a connecting piece (124) for connecting a connecting element (202) of a collet chuck (200) set up to receive a processing tool or a maintenance tool (300) to the spindle. The shank element (110) has a through hole (113) in the longitudinal direction (L) of the spindle (1), wherein the connecting plate (100) has a lubricant inlet (105) for connection to the lubricant supply, and at least one separate compressed air inlet (104) for connection to the compressed air unit. The connecting plate is set up to fluidically connect the through hole (113) of the shank element (110) to the at least one compressed air inlet (104) as well as the lubricant inlet (105).

The present invention provides a work piece chuck of manipulator in the field of mechanical technology. The chuck comprises a chuck sleeve and an ejector pin set within the chuck sleeve. An elastic clamping element is provided at the front end of the chuck sleeve. The ejector pin could move between a first position and a second position along the axial direction of the chuck sleeve. When the ejector pin is in the first position, the outer circumference of the ejector pin extrudes the clamping element to distort and expand outward to form an expansion state. When the ejector pin is in the second position, the outer circumference of the ejector pin is out of contact with the clamping element to restore the clamping element. The chuck has a number of advantages including firm connection, high reliability and high use value.

A dust-proof mechanism for chuck includes a fluid supply source, an inner space inside a chuck, and a discharge space in the chuck. A supply fluid is supplied to the inner space from the fluid supply source, and passes through the inner space as a pressurized fluid. Through the discharge space, the pressurized fluid is discharged to the outside of the chuck from the inner space.

A handling unit comprises: a collet integrally having a reference part, a plurality of elastic deformation parts connected to the tip side of the reference part, finger parts respectively connected to the tip sides of the elastic deformation parts, and a driven part that receives a driving force; a housing having a cylinder structure formed on the base end side or the outer circumferential side of the collet and provided with a fluid supply port and having a collet locking part that locks the collet at a locking position; and an operation body having a driving part that imparts a driving force to the driven part, a pressure reception part that receives the pressure of a fluid supplied from the fluid supply port, and a cylinder slide contact part that makes slide contact with the internal surface of the cylinder structure.

Tool fitting device for a power tool, in particular a chipping hammer, including a holding device for receiving and holding a tool shank, a tool cap, and a dust protection device for preventing the penetration of dust into the tool fitting device. The tool cap includes at least one receiving element and the dust protection device includes at least one protruding element corresponding to the receiving element, such that the tool cap and the dust protection device are able to be connected together in a form-fitting manner. Dust protection device for use in a tool fitting device.

A sealing part disposed between a claw opening-and-closing member and a support member. The sealing part includes a first contact part that is in contact with the claw opening-and-closing member, and a second contact part that is in contact with the claw opening-and-closing member at a position different from that of the first contact part.

A handling unit comprises: a collet integrally having a reference part, a plurality of elastic deformation parts connected to the tip side of the reference part, finger parts respectively connected to the tip sides of the elastic deformation parts, and a driven part that receives a driving force; a housing having a cylinder structure formed on the base end side or the outer circumferential side of the collet and provided with a fluid supply port and having a collet locking part that locks the collet at a locking position; and an operation body having a driving part that imparts a driving force to the driven part, a pressure reception part that receives the pressure of a fluid supplied from the fluid supply port, and a cylinder slide contact part that makes slide contact with the internal surface of the cylinder structure.