Pick system for mining ploughs, in particular coal ploughs

A pick system for a mining plough comprising:

• at least one pick holder and at least one plough pick replaceably insertable in said holder,
• said holder having a working side confronting a mining face to be worked by said pick, a socket in said holder for releasably holding said pick with an interference fit, and an end stop for said pick,
• said pick comprising a shank insertable in said socket and a cutting tip extending from said shank to project from said working side of said holder,
• said holder and said pick being displaceable in operation in an operating direction transverse to said working side of said holder for working the mining face, and said holder having a leading face leading in said operating direction,
• said leading face having a lead-through opening through which said shank of said pick is insertable in an insert direction generally parallel to said working side until said shank engages said end stop, said pick also being removable from said socket through said lead-through opening in a direction opposite to said insert direction,
• releasable securing means for securing said pick against detachment when said pick has been inserted in said socket, and
• said socket in said holder has at least one bearing and guiding surface for said shank which is inclined at an oblique angle relative to said operating direction so that when said pick is removed from said lead-through opening said cutting tip of said pick is moved away from the mining face.

A pick system for a mining plough comprising:

• at least one pick holder and at least one plough pick replaceably insertable in said holder,
• said holder having a working side confronting a mining face to be worked by said pick, a socket in said holder for releasably holding said pick with an interference fit, and an end stop for said pick,
• said pick comprising a shank insertable in said socket and a cutting tip extending from said shank to project from said working side of said holder,
• said holder and said pick being displaceable in operation in an operating direction transverse to said working side of said holder for working the mining face, and said holder having a leading face leading in said operating direction,
• said leading face having a lead-through opening through which said shank of said pick is insertable in an insert direction generally parallel to said working side until said shank engages said end stop, said pick also being removable from said socket through said lead-through opening in a direction opposite to said insert direction,
• releasable securing means for securing said pick against detachment when said pick has been inserted in said socket, and
• said holder has an end face forming a rear boundary of said lead-through opening for said cutting tip of said pick and said end face provides said end stop and a rear face of said pick bears against said end stop, and said end and rear faces are formed as angled faces which lie in the same plane and extend at an oblique angle relative to said operating direction.

A pick system for a mining plough comprising:

• at least one pick holder and at least one plough pick replaceably insertable in said holder,
• said holder having a working side confronting a mining face to be worked by said pick, a socket in said holder for releasably holding said pick with an interference fit, and an end stop for said pick,
• said pick comprising a shank insertable in said socket and a cutting tip extending from said shank to project from said working side of said holder,
• said holder and said pick being displaceable in operation in an operating, direction transverse to said working side of said holder for working the mining face, and said holder having a leading face leading in said operating direction,
• said leading face having a lead-through opening through which said shank of said pick is insertable in an insert direction generally parallel to said working side until said shank engages said end stop, said pick also being removable from said socket through said lead-through opening in a direction opposite to said insert direction,
• releasable securing means for securing said pick against detachment when said pick has been inserted in said socket, and
• said securing means comprises a captive securing element on said pick, said securing element and said pick forming a single component for insertion into said holder, said lead-through opening of said holder includes a locking element comprising a locking shoulder which interengages with said securing element when said pick is inserted into said socket to secure said pick in said socket, said securing element comprises a snap-in latch element that is elastically deflectable between a latched position in which said latch element is latched on said locking element and an unlatched position.

A pick system for a mining plough comprising:

• at least one pick holder and at least one plough pick replaceably insertable in said holder,
• said holder having a working side confronting a mining face to be worked by said pick, a socket in said holder for releasably holding said pick with an interference fit, and an end stop for said pick,
• said pick comprising a shank insertable in said socket and a cutting tip extending from said shank to project from said working side of said holder,
• said holder and said pick being displaceable in operation in an operating direction transverse to said working side of said holder for working the mining face, and said holder having a leading face leading in said operating direction,
• said leading face having a lead-through opening through which said shank of said pick is insertable in an insert direction generally parallel to said working side until said shank engages said end stop, said pick also being removable from said socket through said lead-through opening in a direction opposite to said insert direction,
• releasable securing means for securing said pick against detachment when said pick has been inserted in said socket, and
• said securing means comprises a captive securing element on said pick, said securing element and said pick forming a single component for insertion into said holder, said securing element is displaceably arranged on said pick approximately at right-angles or obtuse angles relative to the insertion direction of said pick into said lead-through opening.

A pick system for a mining plough comprising:

• at least one pick holder and at least one plough pick replaceably insertable in said holder,
• said holder having a working side confronting a mining face to be worked by said pick, a socket in said holder for releasably holding said pick with an interference fit, and an end stop for said pick,
• said pick comprising a shank insertable in said socket and a cutting tip extending from said shank to project from said working side of said holder,
• said holder and said pick being displaceable in operation in an operating direction transverse to said working side of said holder for working the mining face, and said holder having a leading face leading in said operating direction,
• said leading face having a lead-through opening through which said shank of said pick is insertable in an insert direction generally parallel to said working side until said shank engages said end stop. said pick also being removable from said socket through said lead-through opening in a direction opposite to said insert direction,
• releasable securing means for securing said pick against detachment when said pick has been inserted in said socket,
• said securing means comprises a captive securing element on said pick, said securing element and said pick forming a single component for insertion into said holder, said lead-through opening of said holder includes a locking element comprising a locking shoulder which interengages with said securing element when said pick is inserted into said socket to secure said pick in said socket, and
• said shank including a supporting and guiding extension for engagement with said socket, said supporting and guiding extension having a front surface facing said operating direction, an end face opposite to said front surface and a recess formed between said front surface and said end surface, said recess accommodating said securing element, and said locking element on said holder projecting into said recess.