US-12616977-B2 - Concave

US12616977B2US 12616977 B2US12616977 B2US 12616977B2US-12616977-B2

Abstract

The disclosure relates to a concave ( 20 ) of a cone crusher and/or gyratory crusher for installation inside a crusher head ( 30 ), wherein the concave ( 20 ) has a central longitudinal axis (M) extending in the longitudinal direction of the concave, wherein the concave ( 20 ) has a feed ( 24.1 ) for material to be crushed on its top (O) and a crushed material discharge area ( 24.2 ) on its opposite bottom (U), and wherein the concave ( 20 ) has a base part ( 21 ) having an outer clamping surface ( 28 ). In order to reduce the amount of parts and installation work, provision is made according to the disclosure for the base part ( 21 ) to have a support section ( 25 ) having fastening lugs ( 26 ) projecting radially outwards, wherein the fastening lugs ( 26 ) are disposed spaced apart from one another in the circumferential direction of the support section ( 25 ) by means of spacer areas, wherein at least one clearance is provided in each of the spacer areas, which clearances permit a penetration in the direction of the central longitudinal axis (M) from the bottom (U) in the direction of the top (O), and wherein the radially outward extent of the clamping surface ( 28 ) is greater, at least sectionally, than the radially outward extent of the fastening lugs ( 26 ).

Inventors

Otto Blessing
Lucas Scholz

Assignees

KLEEMANN GMBH

Dates

Publication Date: 20260505
Application Date: 20240103
Priority Date: 20230118

Claims (13)

1 . A device for installation inside a crusher head of a cone crusher and/or gyratory crusher, the device comprising: a concave including: a base part having a central longitudinal axis extending in a longitudinal direction of the concave, the base part having a feed opening at a top of the base part and a crushed material discharge opening at a bottom of the base part, the base part further including: a support section defined on the base part and including a plurality of fastening lugs extending radially outward relative to the central longitudinal axis, the fastening lugs being spaced apart from one another in a circumferential direction by spacer areas, each of the spacer areas including at least one clearance extending parallel to the central longitudinal axis; and an outer clamping surface defined on the base part below the support section, the outer clamping surface extending radially outward greater than a radially outward extent of the fastening lugs, at least in portions of the outer clamping surface; and a clamping element including a nut; wherein at least one of the fastening lugs includes a clamping element mount configured to hold the clamping element, the clamping element mount including a pressure surface facing downward towards the bottom of the base part, the pressure surface being configured to support the nut; and wherein the at least one of the fastening lugs includes an anti-rotation device adjacent the mount and configured to hold the nut on the mount in a rotationally secured manner.
2 . The device of claim 1 , wherein: a projection of the clamping surface parallel to the central longitudinal axis onto an imaginary plane perpendicular to the central longitudinal axis extends radially outward beyond a projection of the fastening lugs parallel to the central longitudinal axis onto the imaginary plane, at least in portions of the outer clamping surface.
3 . The device of claim 1 , wherein: the base part includes a circumferential inner crushing surface which at least in part tapers in a direction from the bottom towards the top of the base part.
4 . The device of claim 3 , wherein: the base part further includes a crushing surface extension adjoining the circumferential inner crushing surface by a stepped transition and extending upwards towards the top of the base part.
5 . The device of claim 3 , wherein: the circumferential inner crushing surface extends radially outward greater than a radially outward extent of the fastening lugs, at least in portions of the circumferential inner crushing surface.
6 . The device of claim 1 , wherein: the clamping element includes a clamping screw; and the clamping element mount includes an aperture for the receipt of the clamping screw of the clamping element, and a radially extending passage communicated with the aperture, the radially extending passage being configured to allow the clamping screw to move through the passage into or out of the aperture.
7 . The device of claim 1 , wherein: the clamping element includes a pressure piece and the clamping element is configured such that the pressure piece performs a translatory motion or a combined translatory and rotary motion when the clamping element is moved from an initial position into a clamping position.
8 . The device of claim 1 in combination with the crusher head, wherein: the crusher head includes a bearing part including a counter-surface facing a space encompassed by the crusher head, the clamping surface of the concave bearing against the counter-surface of the crusher head; the crusher head includes a plurality of supports facing the fastening lugs of the concave, the supports being spaced apart from one another in a circumferential direction by crusher head spacer areas; and further comprising a plurality of the clamping elements clamping the fastening lugs of the concave to the supports of the crusher head.
9 . The device of claim 8 , wherein: the crusher head includes a circumferential inner wall forming a feed opening for receiving material to be crushed; the bearing part of the crusher head protrudes from the inner wall toward the concave; and the supports are disposed at a distance from the inner wall inside the crusher head.
10 . The device of claim 8 , wherein: the crusher head includes a male thread on an outer surface of the crusher head, the male thread extending at least in part around the central longitudinal axis.
11 . The device of claim 8 , further comprising: a stop connection between the concave and the crusher head, the stop connection being configured to prevent rotation of the crusher head relative to the concave in at least one circumferential direction about the central longitudinal axis.
12 . A device for installation inside a crusher head of a cone crusher and/or gyratory crusher, the device comprising: a concave including: a base part having a central longitudinal axis extending in a longitudinal direction of the concave, the base part having a feed opening at a top of the base part and a crushed material discharge opening at a bottom of the base part, the base part further including: a support section defined on the base part and including a plurality of fastening lugs extending radially outward relative to the central longitudinal axis, the fastening lugs being spaced apart from one another in a circumferential direction by spacer areas, each of the spacer areas including at least one clearance extending parallel to the central longitudinal axis; and an outer clamping surface defined on the base part below the support section, the outer clamping surface extending radially outward greater than a radially outward extent of the fastening lugs, at least in portions of the outer clamping surface; and a clamping element including a nut; wherein at least one of the fastening lugs includes a clamping element mount configured to hold the clamping element, the clamping element mount including a pressure surface facing downward towards the bottom of the base part, the pressure surface being configured to support the nut; and wherein the mount includes a blocking piece configured to block radial displacement of the nut held in the mount.
13 . A device for installation inside a crusher head of a cone crusher and/or gyratory crusher, the device comprising: a concave including: a base part having a central longitudinal axis extending in a longitudinal direction of the concave, the base part having a feed opening at a top of the base part and a crushed material discharge opening at a bottom of the base part, the base part further including: a support section defined on the base part and including a plurality of fastening lugs extending radially outward relative to the central longitudinal axis, the fastening lugs being spaced apart from one another in a circumferential direction by spacer areas, each of the spacer areas including at least one clearance extending parallel to the central longitudinal axis; and an outer clamping surface defined on the base part below the support section, the outer clamping surface extending radially outward greater than a radially outward extent of the fastening lugs, at least in portions of the outer clamping surface; and a clamping element: wherein at least one of the fastening lugs includes a first screw mount; wherein the clamping element includes a connection section, a screw element and a nut; wherein the connection section includes two spaced apart pressure pieces and a second screw mount aligned with the first screw mount; wherein the nut is held below the at least one of the fastening lugs; and wherein the screw element is passed through the aligned first and second screw mounts and is screwed into the nut.

Description

RELATED APPLICATIONS The present application claims priority to German Patent Application Ser. No. DE 10 2023 101 145.6 filed Jan. 18, 2023, which is incorporated herein by reference. BACKGROUND OF THE DISCLOSURE Field of the Disclosure The disclosure relates to a concave of a cone crusher and/or gyratory crusher for installation inside a crusher head, wherein the concave has a central longitudinal axis extending in the longitudinal direction, wherein the concave has a feed for material to be crushed on its top and a crushed material discharge area at its opposite bottom, and wherein the concave has a base part having an outer clamping surface. Description of the Prior Art Cone crushers or gyratory crushers are used to crush mineral materials. They have a rotating and/or tumbling crushing body, which is disposed inside the concave. The outer crushing surface of the crushing body faces the inner crushing surface of the concave. During crushing operation, the mineral material filled into the crusher head is crushed between the mantle surface and the concave surface. The outer clamping surface of the concave is held on a crusher head. If the concave needs to be replaced, for instance due to wear, the concave can be detached from the crusher head. EP 2 758 176 (U.S. Pat. No. 9,566,585) describes a concave that is connected to the crusher head via a clamped connection having a segmented clamping ring. It is difficult to install this clamped connection, which also requires a large number of parts. From EP 3 317 018 B1 (U.S. Pat. No. 10,391,500) a concave that is inserted into a crusher head is known. The upper rim of the concave has protrusions that project radially outwards. The protrusions have bolt mounts through which the fastening screws are inserted and screwed into threaded sockets in the crusher head. The threaded connection is susceptible to damage, i.e., a secure fastening of the concave cannot always be guaranteed. SUMMARY OF THE DISCLOSURE The disclosure addresses the problem of creating a concave or a crusher assembly having such a concave for a cone crusher or gyratory crusher, which concave requires as few and simple components as possible and which concave permits simple installation and removal while being securely fastened at the same time. The problem relating to the concave is solved in that the base part has a support section having fastening lugs projecting radially outwards, wherein the fastening lugs are disposed spaced apart from one another in the circumferential direction of the support section by means of spacer areas, wherein at least one clearance is provided in each of the spacer areas, which clearances permit a penetration in the direction of the central longitudinal axis from the bottom in the direction of the top and wherein the radially outward extent of the clamping surface is greater, at least sectionally, than the radially outward extent of the fastening lugs. The problem relating to the crusher assembly is solved in that the concave is mounted inside the crusher head, wherein the crusher head has a bearing part, which has a counter-surface facing the space encompassed by the crusher head and against which counter-surface the clamping surface of the concave bears, in that the crusher head forms supports, which face the fastening lugs and which are disposed at a distance from one another in the circumferential direction, forming spacer areas, wherein passages are formed in these spacer areas, and in that the fastening lugs are clamped to the supports by means of the clamping elements. The crusher head can be moved towards the concave to install the concave. Supports of the crusher head can be guided through the openings of the concave. The crusher head can then be rotated relative to the concave until the supports are opposite from the fastening lugs of the concave. Finally, the concave can be clamped to the crusher head using suitable clamping elements in such a way that the clamping surface of the concave is pulled against a mating surface of the crusher head. The clamping elements shall be disengaged for removal. The crusher head can then be rotated around the central longitudinal axis relative to the concave until the supports reach the area of clearance between the fastening lugs. Finally, the crusher head can simply be lifted off the concave. This type of installation/removal is advantageously easy and simple clamping elements can be used. For load-optimized transfer of force, provision may be made for the projection of the clamping surface in the direction of the central longitudinal axis into a plane to jut out beyond the projection of the fastening lugs in the direction of the central longitudinal axis into this plane, at least sectionally. According to the disclosure, provision may be made for the base part to have a circumferential inner crushing surface, at least sectionally, which tapers in the direction of the central longitudinal axis from the bottom to the top,